US1533207A - Printing telegraphy - Google Patents

Description

April 14, 1925.

H. PFANNE-NSTIEHL PRINTING TELEGRAPH! Filed Jan. 31. 1923 '7 Sheets-Sheet l April 14, 1925.

' 'H, PFANNENSTIEHL PRINTING TELEGRAPHY Q 0 x3 0 w? o Q PRINTING TELEGRAPHY Filed Jan. 31. 1923 H. PFANNENSTIEHL April 14, 1925.

ApriI14, 1925. 1,533,207

. H. PFANNENSTIEHL PRINTING TELEGRAPHY Filed Jan. 31. 1923 '1 She tsggg et 4 o o I H O I! n 2 0 O 9/ 94 2 25/ /79 76 o April 14, 1925. 1,533,207

H. PFANNENSTIEHL PRINTING TELEGRAPHY Filed Jan. 31. 1923 7 Sheets-Sheet 6 Q 67 5% a 69 f7", (Q 75 69 6 69 62 63 W April 14, 1925. 1,533,207

' H. PFANNENSTIEHL PRINTING TELEGRAPHY Filed Jan. 31. 1923 7 Sheets-Sheet 7 )4 5 .25 /9/ Hi i: :1. .11 36 3U 'Tlctters' of the Patented Apr. 14, 1925.

UNITED STATES PATENT OFFICE.

HARRY P FANNENSTIEHL, OF MAPLEWOOD, NEW JERSEY, ASSIGNOR TO WESTERN ELECTRIC COMPANY, INCORPORATED, OF NEW YORK,

NEW YORK.

N. Y., A CORPORATION OF PRINTING TELEGRAPHY.

Application filed January 31, 1923.

10 raphy. and particularly to printing telegraph receiving printers, in which the characters of the message are printed in page form.

An object of the invention is a receiving printer which is efficient and reliable 'lll operation and one which 1s comparativelv inexpensive to manufacture.

In accordance with the preferred form of the invention, there is provided a re- 20 ceiving printer having a stationary platen and a type carrying mechanism which is arranged to be moved transversely of the platen, and which is rotated positively to a printing position by the actionof a selecting mechanism under the control of a translating mechanism.

The translating mechanism comprises a single clecti'o-rcsponsive device responsive to line current impulses for releasing aplu- ::o ralitv of selecting elements which have power-coniinuiiicated thereto from a continuously running motor through a friction clutch during their selection followed by a: positive drive connection, and subsequently 'controlling their position. These selecting f elements are both rcvolvable and horizontally movable and have arranged individua-l 'thereto a tripping finger which has lYi'ff()Ptl'tll'lVt! l)()SltlOl1S and which are rejio.ita incd in the selected position determined 3 by the electrimcsponsivc device until the chh i'ai' -t'crcf the selection is changed. Each 'oi tll'cse lingers controls the rotation of a .li 't t throii'glifan angle of 180, the cumiin'hage' arrangement to a type-wheel 7 The type-Wheel shaft carries the t)l ?t--\i"lieel which has the characters arranged thereon in a single row, that is, the

alphabet are arranged on sub- -staiitial.l v one-half of'the type-wheel, while the g r P tu t n marks and other of which is translated by means Serial No. 616,020.

special characters occupy the remaining portion thereof. The type-wheel is capable of being rotated in either direction and through the shortest arc to bring the desired character into printing position with respect to a printing hammer which is operated upon the movement of a universal bail for causing the impression of the aligned type on the printing medium.

The auxiliary operations, such as line feed, carriage return, shift and unshift are accomplished by the use of auxiliary selecting members which are moved in accordance with the positioning of the corresponding tripping fingers.

A better understanding of the invention may be had from the following description, taken in conjunction with the accompany ing drawings wherein an embodiment of the invention is illustrated.

Referring now to the drawings, Fig. l is a plan view of the receiving printer constructed in accordance with the embodiments of the present invention. Fig. 2 is a front elevation of the mechanism of Fig. 1. .Fig. 3 is a front elevation of the receiving printer with a portion of the mechanism removed for the sake of clarifying the drawing. Fig. 4 is an end elevation with the cover removed. Fig. 5 is a perspective of a portion of the selecting and translating mechanisms. Fig. 6 illustrates the method of positioning the selecting rods. Fig. 7 is a plan view of a portion of the auxiliary selecting mechanism. Figs. 8, 9. 10 and 11 illustrate positions assumed by the auxiliary selecting elements for performing their alloted function. Fig. 12 is a detailed view showing the method of releasing a shaft which controls the rotation of the type-wheel from the portion carrying the letters to the portion carrying the figures, punctuation llHH'liS and other special characters. Fig. 12- is a view of the mechanism of Fig. 12 except the mechanism in this figure is shown in its operative position. Fig. 14 is a detail View showing the manner of connecting the tripping fil1- gers with their corresponding selecting rods such that they are operated sequentially but function on their associated apparatus siniultaneously. Fig. 15 illustrates the man.

loo

' printing bail. Figs. 22 and 23 areudetail .studies showing the space cut-out and no her of operating a tripping finger for causing the operation of either the carnage return or the line feed mechanisms. Figs. 16 and 17 are sectional views showing the manner of releasing and stopping the shaft with which the selecting elements rotate. Fig. 18 is a perspective of a portion of the drivin gears. Fig. 19 is a detail study showing the type-wheel carrying mechanism and the rinting hammer with its operating bail. ig. 20 illustrates the manner of rotating the type-wheel shaft. Fig. 21 is a detail study showing a portion of the gearing mechanism and the operating cam which controls the movement of the printing positions of the printing mechanism. Fig. 24 is a detailed view of the positive clutch. Fig. 25 is a sectional view showing the spacing mechanlsm. F1g. 26 is a plan view of the ribbon advancing mechanism in one of its operative positions. Fig. 27 is a plan view'or ribbon advancing mechanism in another of its-operative positions. Fig. 28 is a detail view of the ribbon advancing mechanism looking from the right of Fig. 27. Fig. 29 is a sectional view taken along the broken line 29-29 of Fig. 2. Figs. 30 and 31 show two positions of the lever. 'arrangement for positioning the type-wheel so. that the characters P and 6 respectively will be in a printing position. Fig. 32 is a sectional view taken along the broken line 3232 of Fig. 3. Fig. 33 is a sectional view taken along the broken line 3333 of Fig. 3.

Fig. 34 is a diagrammatic view showing the circuit connections with the use of a line relay. Fig. 35 illustrates an alternative arrangement of Fig. 34.

'Referring to Figs. 2 and 3, preferably the latter, a front view of the printer il lustratingthe arrangement of a plurality of pivoted levers 5, 6, 7, 8 and 9 is shown. Each of these levers has its pivotal point so arranged that the distance through which they 'move is different, that is, upon the movement of the lever 5 in either a downward or upward direction, a member 10 will be moved through a given distance. Likewise, if the lever 6 is caused to move in either a downward or upward direction due to the movement of the connecting links 12 or 13, the member 10' will be moved through a distance greater than that caused by the movement of the lever 5.

' By arranging these levers in this manner,-

the various combinations of steps necessary for rotating a type-wheel from one position to another, so that the different characters carried thereby may be brought into a printing position, are attained. It is thus seen that one of the ba-rs is designed to move the type-wheel through a distance of which has slots cut therein corresponding" to each of these bars so that an easy movement thereof, with the least possible amount of friction, results.

As shown in Fig. 32, which is a cross section taken along the line 32-32 of Fig. 3, the bars or connecting links are secured to the pivoted levers ,so that for each movementof the bars 14, 15, 16, 17 and 18, a resultant movement of the link 12will be brought about corresponding to the distance through which the associated bar is moved. The manner ofv connecting the links 19 and 20 with the pivot, to which the pivoted.lever 5 is connected, differs somewhat from thatjust described and which is il-.

lustrated in Fig. 33. Between the plate 21 and a surface of the lever 5, there is a washer 23 which holds this lever out of engagement with the member 21. The bar 20 hasone end formed in the shape of a hook which fits over the end of the pivoted lever 5 while it is held in position by the enlarged portion of the link or bar 19, the whole combination being held in position by means of a pin or fastening means 24.

The member 10, which is moved upon the movement of the links, as will be-described be moved in a vertical direction. As shown more in detail hereinafter,is arranged to in Figs. 3 and 20 the member 10 has cut on one side thereof teeth which are arranged to engage the teeth, of a pinion 28 carried bya shaft 25, journaled in upone edge thereof which engage the teeth in the pinion 28. Similarly, this rack 30 is held in contact with the teeth onthe pinion 28 by means of a roller 31. As shown in Fig. 20, one end of the rack 30 extends into a hollow member 32 which tion of the operation, the rack 30 will have to work against the force exerted by the spring 33, thereby providing a more positive action and permitting of the more ac-f,

of various depths, there being a tooth on the opposite side of each of the types. The teeth in the rim of the wheel 38. individual to each of the characters, are all of the same width and depth. The other teeth are pro vided for permitting various auxiliary operations, such as spacing without printing, etc. These teeth are also provided for the purpose of enabling the accurate centering of the type-wheel with respect to the printing mechanism and the printing medium. prior to the actual engagement of the printing hammer with the type-wheel. Since it is sometimes desired to cause the spacing of the type carrying mechanism without cansing the printing of a character. the depths of the teeth are not the same. Thus. as will be more clearly described hereinafter, the printing mechanism, owing to the depth of the teeth in the rim of the wheel 38. is not permitted to go to its fullest extent for engaging the type-wheel, but, on the other hand, the mechanism is so arranged that the spacing mechanism will be operated.

Fixed to the Wheel 38 is a type-wheel 39. on one side of which the various characters are embossed. The manner of mounting the type-wheel 39. which is provided with inwardly extending portions. is such that upon engagement of the printing mechanism, a portion of the wheel will be moved forward and upon its release will be quickly restored to its normal position. For preventing the printing or smudging by the characters, adjacent to the one being printed. at flexible steel shield 40 is secured to the bearing of the shaft 37 such that it is dis posed between the type-wheel and the ink ing ribbon. The bevelled gear 35 and the -shaft 37 are each rotatably mounted on a tit) fork ot a Y-shapcd member -15 which is horizontally movable along a shaft 46. Likewise arranged with respect to the shaft 16 is a printing hammer 47, both the Y-shaped member and the printing hammer -17 being integral with a movable carriage 44. The carriage 44, as Will be described more in detail hereinafter, is arranged to be moved from left to right in'a step-by-step motion under the tension of a spring and returned to its extreme left-hand position for the commencement of a new line of printing upon the transmission of a special group of impulses that is termed the carriage return mechanism.

The selecting mechanism shown in Fig. 5 comprises a single selecting magnet having a pair of oppositely disposed coils 5t and 52 which are supported on a frame 53. The coils 51 and 52 are arranged when energized to effect the movement of a pivoted armature 54 to which there is secured at one end thereof a bevelled extension 55. Since it is oftentimes desirable to connect the magnet directly in circuit with the line, an extension pin 43 is secured to the armature 54: and is adapted to serve as a fastening means for a spring 56 which extends between the extension pin 43 and an upright 57 secured to the base of the printer mechanism. One end of the spring 56 is fastened to a rotatable member 58 fixed in the 'upright 57, thereby permitting the adjustment of thetension exerted on the armature 5%.

Normally, when the selecting magnet is used without the biasing spring 56, the armature 54 lies in a central position to the coils 51 and 52 so that the bevelled extension is in a position central to a pair of deflecting fingers 4S and 49. These deflecting fingers 48 and 49 serve to guide the ends of a plurality of selecting rods 60. (51. 6:3. (33 and 64 upon their rotation in the path of the bevelled extension 55. As shown in Figs. 1 and 5, the selecting rods (30 to (34 extend horizontally across the back of the machine and have the extreme right end thereof bent at an angle of approximately in). These selecting rods 60 to 64 inclusive are arranged concentrically about a shaft 59 which has power communicated thereto from a continuously rotating motor and which is arranged to effect the rotation of the selecting rods. Each of these selecting rods arranged to occupy either of two operative positions and is arranged to be deflected to one side or the other of a stationary locking vane 65 due to the positioning of the bevelled extension 55 carried by the arn'iature 54. It is thus seen that when once the selecting rods are positioned to one side or the other of the stationary locking vane 65, they will be retained in the position set until a subsequent selection which requires the same to be placed in the other of their operative positions. Thus, it it is desired to position any one of the selecting rods either to the right or left of this locking vane, and in which position they will be in an operative position with respect to the other mechanlsm of the printer, the armature 51 must be moved so that the bevelled extension lies in the path of the projection on the selecting rod next to engage this part to either the left or the right of the vane .65 depending upon which of the coils 51 or 52 is energized. Accordingly, the selecting rod will be moved a distance equal to the thickne s Jan of the vane 65 which distance is suflicient to permit of the satisfactory operation of the mechanism.

Individual to each of the selecting rods 60 to 64 inclusive and rigidly secured thereto are operating cams or tripping fingers 66, 67, 68, 69 and 70 which are of the shape shown in Fig. 14 and although the rods to which they are secured are operative successively, they will function on the associated mechanism simultaneously. Fixed to each of the tripping fingers 66 to 70 inclusive is a circular plate 75, beneath which and movable therewith are a plurality of auxiliary selecting bars 76, 77, 78, 79, 80,

81, 82, 83, 84 and 85 supported on rollers 86.

The selecting bar 80 is provided with a horizontal extending portion 87 so that for certain positions of the other selecting bars, the free ends thereof, rather than rest on the roller 86, will engage the extension 87, thereby setting up a condition identical to that as if they were raised or piled up on the roller 86, as shown in Fig. 8.

In order that the selecting rods may be revolved for successively positioningthe various cams or tripping fingers in accordance with the energization of selecting magnet for the desired character to be printed or for selecting purposes, the selecting rods to 64 inclusive are rotatable but freely movable in a horizontal direction in the bifurcated portion of a spoke-shaped member 88 which is rigidly secured to the driving shaft 59. The driving shaft 59 has power communicated thereto from a continuously running motor 93 through a worm gear 94 secured to the shaft of the motor and a drivinglpinion 95. The pinion 95 is secured at one extremity of. an operating shaft 96 which extends from the back to the front of the machine and upon which there is arranged a plurality of driving gears. Secured intermediate the ends of the shaft 96 is a bevelled gear 98 normally tending to rotate due to the frictional engagement (thereof with the friction discs 99 disposed on each side thereof and having associated therewith driving members which are rigidly secured to the shaft 96. The bevelled gear 98 engages a similar gear 97 secured to the end of theshaft 59 opposite to that to which the spoke-shaped member 88 is socured. In mam-m way the normal pressure between'the friction discs 99 and" the bevelled gear 98, plate 100 with a horizontally projecting portion having the free end thereof bifurcated and a spring 101 disposed intermediate the plate 100 and a distance nut 102 are provided. Thus by varying the pressure on the spring 101, a corresponding variation in the pressure existing between the various parts with which it is associated is effected.

During a portion of the revolution of the bevelled gear 97 especially during-the period that the selecting rods 60 to 64 inclusive are bemg posltioned to one side or the other of the vane 65 depending upon the energiza- =tion of the selecting magnet 50, the load on providing this positive drive connection between the respective shafts, a toothed wheel 105 is rigidly secured to the shaft 96 which is adapted to be engaged b a flexible spring 106 carried by the gear 97, as shown more clearly in Fig. 24. The spring 106 is arranged with respect to the wheel 105 so that the engagement of the free end of this spring with the teeth of the wheel 105 occurs at the proper moment, that is, the time when the greatest load is applied to the shaft 96.

Also secured to the shaft 59 is anirregularly-shaped stop arm 110 best shown in Figs. 16 and 17 which during the non-rotation of the shaft 59 engages an extension on a gnember 111 pivoted to a stationary member 112. One end of the member 111 engages the bifurcated end of a rotatable bar 114 pivotally secured to a plate 115 towhich there is also pivoted a latch 116. This latch 116 is normally held in position by a spring 121 secured to a portion thereof and the plate 115. The under-surface of the latch 116 has a notch cut therein which is adapted to receive one end of the bar 114, thereby retaining the extension on the member 111 in the path of the stop arm 110. By this arrangement, the shaft 59 will be normally held against rotation and will be started upon the initial energization of the selecting magnet 50 for, as shown in Figs. 16 and 17, i

the armature 54 of this magnet is in operative relation to the latch 116. Accordingly,

when the electromagnet 50 is energized in the proper direction, the armature 54 Stl'lkGS' against the latch 116, thereby raising one end thereof and causing the bar 114 to disengage the notch on the under surface of this latch for removing the extension on the. member 111 out of the path of the stop arm 110. As previously stated, power is continuously applied to the shaft 59 through a suitable. friction clutch. Consemiently, this shaft will be at this moment released and will continue to revolve until it is again stopped by the engagement of the stop arm 110 with the extension carried by the mem her 111.

Just prior to the completion of the cycle of rotation of the shaft 59 and due to the engagement of the member 111 with the irregular surface of the member 110, the

member 1111 together with the bar 114will be restored to their normal position, thereby lacing the extension on the member 111 in the path of rotation of the stop arm 110. By this arrangement, the shaft 59 will be started into operation at the beginning of each signal riod and will be automatically stopped fol owing the positioning f the selecting rods necessary for the positioning of a character on the type wheel in alignment with the printing medium and the rinting mechanism for effecting the printmg of the desired character.

In order to compensate for local starting time of the selecting mechanism, it is highly desirable that some means he provided whereby the time between the release of the selecting rods for rotation and the engage ment of the first rod with the bevelled extension on the armature 54 may be varied. In the present invention, this feature is accomplished by the provision of an arm secured to one end of the rod 113 and arranged in a manner such as to be capable of rotation. The member 118 may be locked in its set position by means of a screw 119. Thus when it is desired to vary the time interval between the release of the stop arm 110 and the engagement of the first selecting rod with the bevelled extension on the armature 54, it only becomes necessary to loosen the screw 119 and rotate the member 118 to a position which gives the de sired result.

Referring again to Fig. 5 extending across the back of the machine and in front of the tripping fingers 66 to is a plate 125 on which there is mounted a plurality of U-shaped members 126 and 127. Pivotally mounted in the U-shaped members 126 and 127 and arranged such that the free ends lie side by side are release latches 128 and 129, one being pivoted to the upper part of the. U-shaped members 126 and 127 while the other is pivoted to the lo er portion thereof and are thus operated independent of the other. in order that the release latches 128 and 12!) will be held normally in a positibn for operation, a suitable spring, such as 130 is fastened between each pair of release latches. The release latches 128 and 129 are arranged to be moved out of the path of the projection carried by a shaft individual thereto by the cams or tripping fingers 66 to 70 inclusive dependingupon the position of the corresponding selecting rod and are arranged, as will be more clearly described hereinafter, to permit of the rotation of the corresponding shaft through a half cycle or an angle of 180.

Corresponding to each of the pair of release latches and extending horizontally from the back to the front of the machine are operating shafts 135, 136, 137, 13 8, 139, Ht 141 and 142. Each of these shafts with the exception of 135 and 136, as more clearly shown in Figs. 2 and 3, have secured at their front ends rectangular shaped pieces 143,.

144, 145, 146, 147 and 148 to which the respective connecting links 14, 15, 16, 1-7, 18 and 22 are connected.

At a point intermediate the ends of each of these shafts there is positioned a gear wheel 151, the teeth of which engage the teeth in the corresponding gear wheel secured to the adjacent shaft. Disposed on each side of thesegear wheels is a disc of friction material 152 and 153, the former of which is secured by means of a plate 154 having a horizontal extending portion, the free end of which is bifurcated and is secured in place by a distance nut 155. -In order that the pressure between the disc 152 and the gear wheel 151 may be varied, a spring 156 is placed intermediate the plate 154 and the distance nut 155. Thus, by varying the position of the distance nut 155 on the associated shaft, the tension of the spring 156 may likewise be varied. Disposed on the opposite side of the friction disc 153 is a gear wheel 157 which is rigidly secured to the associated shaft. This gear wheel 157 has teeth arranged thereon for but a small portion of its circumference for the purpose, as will be more clearly described hereinafter, of forming a positive drive connection between the driving means and the shaft with which it is associated.

Referring now for the moment to Fig. 18, beneath each of the gears 151 is an idler gear 158 fixed to a shaft sup orted by two horizontally extending mem ers 159 and 160 and engaging the teeth in the gears 151. The idler gears are held firmly in engagement with the teeth in the respective gears by a spring 161 secured at a point intermediate its ends in a manner to exert an upward pull on the shafts to which the idlers are secured. Power is communicated to the gears 151 and the idlers 158 and their associated parts, as shown in Fig. 1, through a gear 165 rigidly secured to the shaft 96 for driving the gears 151 to an'intermediate gear 156 which serves to reverse the direction of rotation of these gears with respect to the main driving gear 165. It is thus seen that since power is continuously su plied to the shaft 96 from the continuous y running motor 93, these gears will likewise be continuously revolved but owing to the engagement of the projection on one end of each of the respective shafts with either of the latches 128 or 129, these shafts are prevented from rotating but will, however, rotate the instant they are released due to the frictional association of these gears with the friction discs 152 and 153. Consequently, when these shafts are released and reach the point when the greatest load is applied thereto. the toothed v'hcels 157 are brought into place and form a positive drive connection for the associated shafts. Suclr an arrangement eliminates any slippage in the friction clutches and provides 21. ,Disposed on one face of the gear wheel 170 is a disc of friction material 173 which also engages a second gear wheel 174 and which has teeth formed thereon for; only a small portion of its circumference for providing a sitive drive connection between the idler 170 and the teeth thereof. To the opposite face of the gear wheel 174, there is rigidly secured a circular plate 175 having a depressed portion and having secured thereto a cam 177 which normally tends to rotate due to its engagement with a friction disc 178 which is rotated with the shaft 96 due to its engagement by a metal disc 179 having a horizontally extending portion, one end of which is bifurcated to receive the locking screw of a distance nut 180. As previously described in connection with the friction clutches, a sprin 181 is disposed between the circular plate 179 and the distance nut 180 for varying the pressure exerted on the friction disc 178. The cam 177 with its associated parts is held against rotation by its engagement with a projecting portion of a rod 185 which extends across the back of the machine and which is arranged to be op erated upon the operation of any one of the release latches 129. As shown in Fig. 5,

positioned beneath each of the release latches 129 is an arm 186 carried by the shaft 185 and arranged to be operated upon the operation of any one of these release latches. Ac-

' cordingly, when any one of these release latches is operated, the corresponding arm 186 is, depressed for, causing the rotation of rod 185 andconsequently the removal of the projection thereof out of the path of the cam 177. \Vhen this condition exists, the cam 177 with its associated parts is free to rotate by power communicated to the driving shaft 96 from the continuously running motor 93.

When the extension on the rod 185 is moved out of the path of the cam 177, this I cam, together with the gear 17 0 is free to rotate and since power is communicated to the friction clutches 173 and 178, the gear 170 will be rotated until the extension on the rod 185 again engages the, cam 177. Following the releaseof gear 17 0 and the earn 177, as is more fully shown in Fig. 21 and 1' following the positioning of the levers 5, 6,

' secured to one extremity thereof to move in- 7, 8 and 9, depending upon the particular selection chosen, the disc 174 allows the arm 190 together with its associated roller a downward direction, thereby causing :1

bevelled gear 192 which has its teeth meshed with a slmilar bevelled gear 193 secured to the rod 194. As shown in Fig. 2, there is secured to the rod 194 and rotatable therewith an operating bail 195 which has a portion thereof in alignment with a rojecting part of the printing hammer 47. en the rod 191 is allowed to move in a downward direction, the bail 195 through the bevelled gears 192 and 193 is caused to move in a direction such that the bail 195 causes the printing hammer to engage the aligned type for causing the impression of the desired character. However, before the printing of the desired character is effected, apart of the printing hammer 47 whichhas its surface bevelled engages the walls of a tooth in the rim of wheel 38 for correctly aligning the type wheel with respect to the extreme end of the printin hammer 47. As pre viously described, t e wheel 38 is provided with variously shaped teeth. Those individual to the characters are, however, of the same shape so that upon the engagement of the bevelled portion of the printing hammer 47 with the walls of any of these teeth, any slight displacement of the type wheel 39 will be corrected.

Referring now for the moment to Figs.

2 and 25 there is shown a mechanism for causing the spacing of the type carriage between letters and words, and the restoration of this type carriage to its left-hand position for the commencement of a new line of printing. The type carriage 44 is mounted 203 and'an operating pawl 204. The former engages the teeth of the stationary rack 200 for holding the carriage 44 in the set position, while the latter engages the teeth of the rack 201 and serves to cause the advancement of the carriage 44 a distance equal to that of one tooth. As shown'in Fig. 2, attached to the rack 201 is a bell crank lever 207 havin its free end in the path of an arm 206 which is secured to shaft 19].. Upon each rotation of the shaft 191 the bell cranklever 207 under the action of its retractile spring is moved to the left whereupon pawl 204 engages the next succeeding tooth in rack 201. Following the printing operation, arm 206 again engages the free end of bell crank lever 207 for moving rack 201 to the right. Accordingly the carriage 44, owing to the engagement of pawl 204 with a tooth in'rack 201 is moved tothe right a space equal to one tooth, in which position it will be held independent of the action of pawl 204, as hold pawl 203 has by this time engaged the next succeeding tooth. In spacing'between words, it is necessary that the printing mechanism be made ineffective. In the present invention, this is accomplished, as reviously described,- by the arrangement of the teeth in the wheel 38 such that when one of these teeth is brought into alignment with the printing Hammer 47 the travel thereof is limited to such an extent that no printing results in its operation. However, the distance through which the rod 191 rotates is sufiicient to cause the operation of the spacing mechanism.

The carriage 44 which is moved from left. to right step by step under the tension of a spring 205 may be restored to its lefthand position for the commencement of a new line of printing by the transmission of a special series of impulses for ermits ting the rotation of shaft 136. iecured to this shaft 136 is a cam 209, each half of which is identical to permit of the same operation during each half revolution thereof. Arranged in operative relation to this cam 209 is an operating bar 211 which is normally in engagement with the vertically movable bar 202. lVhen the shaft 136 is released for rotation by the operation of the auxiliary selecting elements 81 to 85 inclusive such that the enlarged portions 226 are aligned, as shown in Fig. 10. Cam 228 is effective for causing the operation of the release latches associated therewith for permitting the rotation of shaft 136. As the shaft 136 rotates, the cam 209 raises the operating bar 211 to a point where the pawls 203 and 204 are disengaged from theteeth in the racks 200 and 201. Inasmuch as the type carriage 44 is moved from left to right under the tension of a spring, the instant the pawls disengage the teeth in the respective racks, the type carriage will be restored -to normal under the action of spring 205. In order that the bar 202 will he held in a position such that the pawls are prevented from engaging the teeth in the racks 200 and 201 before the carriage has been restored to its extreme left-hand position, a locking member 212 is provided at the extreme left-hand end of bar 202. Consequently,- when this bar is moved vertically, it is engaged by a notch in the inner side of member 212 and held in that position until the carriage is restored to normal. To lessen the jar on the type carriage upon its return to its normal position under the action of spring 205, a spring-pressed plunger 213 is arranged in the -path of the carriage and serves as a buffer for the carriage. lVhen the plunger 213 is moved due to force applied thereto by the return of the. carriage, the locking member 212 is moved to a position such that it disengages the bar 202 and allows it to be restored to its normal position under the ac'lion of 1 retractile spring.

Extending between the uprights 26 and 27 is a shaft 215 upon which the plat roll 216 is mounted and which has secured at each of its ends knobs for permitting the manual rotation thereof. Associated with the platen roll 216 are suitable springpressed rollers for firmly gripping the printing medium 217 as it is fed around the platen roll. Also secured to the shaft 215 is a bevelled gear 218 which has its teeth meshed with a similar gear 21.). The latter gear is mounted on one end of a vertically extending shaft 220 to which there is also secured a bevelled gear 221. The bevelled gear 221 likewise meshes with the teeth of a bevelled gear 222 carried by shaft 135. The arrangement of the teeth on the bevelled ears 221 and 222 is such that for each half revolution of the shaft 135 the platen roll 216 will be rotated a distance sutiicient to move the paper through what is usually termed a double space.

In or er to permit the rotation of the platen roll by hand without causing the rotation of the bevelled gear 219 and its associated shaft, gear 219 is provided with teeth on only a portion of its periphery. This feature is best shown in Fig. 29. As shown in this figure, the gear 219 is springpressed from the upright 27 by means of a coiled spring 223. Following the rotation of the platen roll 216 to advance the paper 217 to position an unprinted area before the printing mechanism, the gear wheel 219 is rotated to a point such that none of its teeth are meshed with those of the bevelled gear 218. Consequently, the platen roll 216 may be rotated freely by hand without endangering the other mechanism.

Referring to Figs. 12 and 13 controlled by selecting rod '62 which carries the cam or tripping finger 68 is an operating cam 230. The operating cam 230 is pivoted to a cii= .cular disc 235 and is arranged to he moved to one of two operative positions by a connecting link 231 extending from the rod 62 to the operating cam 230. For rendering the operating cam 230 effective,- a pivoted bell crank lever 232 is provided. Upon the positioning of the auxiliary selecting members 76 to 80 inclusive in either of the positions shown in Figs. 8 or 9, the cam 230 upon its continued rotation is locked by the hell crank lever 232 and causes the operation of release latches 233 or 234 depending upon its position. It is to be noted here that the release latches 233 and 234 are supported in a manner similar to that described in conne:-tion with release latches 123 and 120. Like the release latches 123 and 129, release lltl ' the discs 75 with which they are associated to such a position, the bell crank lever 232 will be fulcrumed onthefree end of the member 76 so that, upon rotation of the selecting rod 62 together with the cam 230 controlled thereby, this cam will engage the opposite end of the bell crank lever 232 thereby causing the operation of either the release latch 233 or 234, depending upon. whether the selecting rod 62 is positioned to theright or left of the locking vane 65.

Upon the operation of either of these re lease latches, shaft 142 is permitted to revolv through an angle of 180, thereby im-v parting to the block 148 a similar degree of rotation, and consequently causing the movement of link 22 and the operating lever 9 to a position whereby the type-wheel shaft will be rotated for causing a similar rotation of the type-wheel. The angle through which the type-wheel is moved for this particular operatlon is such that it will be shifted from the portion carrying the letters of the alphabet'to the portion upon which the figures, punctuation marks and other special characters are formed or vice versa, de-

pending upon which one of the release.

' riage without causing the impression of a with the type wheel 39.

character and in one distinct operation the auxiliary member 79 with its extension 87 is arranged so thatwhen the members 7 6, 77, 78 and 80 are in the position shown in Fig. 9, it is not necessary to effect the movement of all of these members but only requires the movement of the member '79 by its corresponding discs. \Vhen the members are positioned, as shown in Fig. 13, on the extension 87 rather than the roller 86, a condition similar to that just described will exist upon the rotation of the rod 62 together with its operating cam 230. For this condition, the type-wheel is rotated to a position where a tooth of the wheel 38 which is of a depth sufficient to permit the operation of the spacing mechanism but does not allow the engagement of the printing hammer Accordingly, the type wheel will be shifted from the portion carrying the figures and punctuation marks to the portion upon which the letters are formed and at the same time the carriage 44 will be advanced a distance equal to the space of one tooth. From the above descrip tion, it is apparent that by means of such-an arrangement, the type-wheel will be shifted through a relatively large angle with one distinct operation. o

The mechanism for advancing the inking ribbon continuously as illustrated in Figs. 4, 26 and 27, comprises a pair of ribbon spools 240 and 241 upon which the inking ribbon 242 is wound and which are arranged on the top of the printer mechanism, as shown in Fig. 1. The ribbon spools 240 and 241 are revolvably supported by arms 248 individual thereto. Individual to each of the spools 240 and 241 are gear wheels 244 and 245 respectively which serve upon the engagement thereof with the teeth in a worm gear 246 securedto a shaft 247 to cause the advancement of the inking ribbon. Secured to one end of the shaft 247 is a bevelled gear 248, the teeth of which mesh with those of a corresponding bevelled gear 249 which is secured to a shaft 250 driven from the continuously rotating shaft 96 through bevelled gears 251 and 252. As shown in Fig. 28, the shaft 247 is mechanically locked in a position whereby the teeth of the worm gear 246 mesh either with the gear wheels 244 or 245 depending upon the position of the end of this'shaft with respect to an extending portion'236 of the vertically supported member 254. For preventing the accidental movement of this shaft from its two operative positions, a spring-pressed member 253 pivoted to the vertical member 254 is provided but which may be readily moved so as to permit the positioning of the shaft 247 in either of its two operative positions.

Attached to the worm gear 246 is a projection or shoulder 255 which under normal conditions is unrestrained against rotation but which is arranged to be held against. rotation upon the movement of pivoted. levers 256 and 257. Each of these levers has a'slot cut in one end through which the inking ribbon is designed to pass but which is not large enough to permit the passage of a button 259 secured near each end of the inking ribbon 242. Thus, when the button 259 engages the slot in the member 256, the extension 255 produces a cam action whereupon the worm gear 246 is caused to disengage the teeth of the gear wheel 245 the member 256 will be rotated a distance suflicient to cause the lower extremity of this member to engage the shoulder 255, thereby causing the worm gear 246 to disengage the teeth in the gear 245 and engage those of the gear wheel 244 or reversing the direction of travel of the inking ribbon. Immediately following the disengagement of the button 2-59 with the lever 256, this lever will be restored to its normal. condition under the action of a retractile spring 286. It is to be noted also that the free end of the shaft 247 for the condition just described has been moved from a position below the projection'236 to a position above this projection or the position shown in Fig. 28.

The receiving printer hereinbefore described is operated preferably by various combinations of five selecting current units and by an additional impulse preceding the selecting units for a condition that may be termed the distributing connecting mechanism for operation. Impulscs may arrive over the line and pass through a line relay 260, as shown in. Fig. 34, which has both front and back contacts. To the front and back contacts, the windings of coils 51 and 52 of the electromagnet are connected. In some cases, it may be advisable to eliminate the line relay and use but one set of windings of the selecting magnet 50, as best shown in Fig. 35, and normally bias the armatureof the selecting magnet by the use of the coiled spring 56.

1 The operation of the printer mechanism described hereinbefore relative to a particular type selection and the operations incident thereto are. as follows:

For the sake of clearness, let it be assumed that it is desired to select and print the character P. Further assume that the character P comprises the following selective current units; no current, current, current, no current and current. Also assume that the type-wheel 39 is in a position for printing the letters of the alphabet.

Preceding the above selecting units, it is necessary to transmit a starting unit which in the present case amounts to opening the line circuit whereby the line relay 260 is'deenergizcd, thereby causing the energization of the coils 51 of the selecting magnet 50. The energization of coils 51 of the selecting magnet 50 causes the reversal ot' the position of the armature 54 whereby the release latch 116 is rotated about its pivot, thereby effecting the disengagement of the bar 114 with the notch on the under-surface of this release latch. The

releascof the barll l causes the member 111 to be rotated about its pivot a distance suflicient to move the extension on this member outof the path of the stop arm 110 secured to the shaft 59. The instant the member 111 is moved in this manner, the shaft 59, together with the stop arm 110, is free to rotate since, as previously described. po-wer is communicated to this shaft from the continuously running motor 93 through friction clutches associated with the bevelled gear 97.

The first selecting unit of the combination selected being no current, the line relay 260 remains (leenergizcd, thereby maintaining the coils 51 of the selecting magnet 50 energized until the position of the armature of line relay 260 is again reversed. The shaft 59, together with the selecting rods 60 to 64, inclusive, now being rotated causes the project on on each of these rods to successively engage the bevelled extension 55 on the armature 54. Inasmuch as the coils 51 are, for the particular selection chosen, energized the armature 54 will be in a position whereby the projection on the selecting rod will be moved .to the right of the locking vane upon the continued rotation thereof for causing a similar displacement of the cam or tripping finger 66 with re spect to the release latches 128 and 129 or, in other words, being in a position upon its continued rotation to operate the release latch 128. Upon the transmission of the second selected unit which consists in applying tothe line 261 a source of current, the line relay 260 will be energized whereby the coils 51 of selecting magnet 56 will be deenergized, while coils 52 of this magnet are energized for reversing the position of its associated armature. Thus, the bevelled extension 55 will be moved to the right so that upon the engagement of the projection on the selecting rod 61 with this bevelled extension, it will be deflected to the left of the locking vane 65, and consequently moving the selecting rod 61 and the cam or tripping finger 67 a distance equal to the width of this locking vane. The next selecting unit being current, line relay 260 will remain energized, thereby retaining the armature 5t in its extreme right-hand position. Accordingly, the projection on the selecting rod 62. lilre that of 61, will be moved to the left of the locking vane 65. For the next selecting unit, line relay 260 will be deenergized for causing the movement of the selecting rod 63 in a manner identical to that described in connection with the movement of the selecting rod 60. The last selecting unit consists in applying current to the line, thus causing the energization of coils 52 and the reversal of the position of armature 54. Upon the engagement of the projection on the selecting rod 61 with the bevelled extension 55, the rod 64 will be moved to the right and retained in this position until the character of a subsequent selection is changed.

Following the positioning of the selecting rods in the manner just described, the cams or tripping fingers 66 to 70 inclusive will be in a position just about to operate the corresponding release latch at which time the flexible spring 106 carried by the bevelled gear 97, as shown more clearly in Fig. 24, will be approaching the teeth in the gear wheel 105. During the operation of the release latches 128 and 129, it is necessary to provide a positive drive connection between the shaft 59 and the shaft 96 as at latches 128 and 129 is designed to be released only by the operating cam or tripping fingers 66 to 70 inclusive when the corresponding selecting rod is moved either to the right or left with respect to the lock-. ing vane 65, the shafts 137 to 141 will be released for rotation simultaneously upon the engagement of the tripping fingers 66 to 70 with the release latch restraining the respective shaft against rotation. The position of the release latches just prior to their engagement with their corresponding release latches, is shown more clearly in Fig.- 14.

In this'case, the shafts 137 to 141 will be rotated through an angle of 180 due to the frictional engagement of the friction discs 152 and 153 with the continuously running gear 151, thereby moving the operating levers 5, 6, 7, 8 andv 9 to the position shown in Fig. 30.

For the first few degrees of rotation of shafts 137 to 141 inclusive, no appreciable load is applied to the friction clutches but is only noticeable for approximately 150 of each half cycle of rotation, that is, between the first and the last 15 of rotation, during which considerable slippage takes place between the several gears and the friction discs owing to the increased load resulting in the movement of the connecting levers. To obviate this condition, a positive drive is effected between the respective parts by the use, as previously described,

1 of gear wheels 157 which have teeth formed v 158, thereby establishing a positive drive on the periphery thereof for only a portion of the circumference. Thus,- during the period of increased load, the teeth in the gear wheel 157 engage those in; the idlers connection for lessening the load on the friction clutches individual to the respective gears 151 and giving a more positive "action.

The movement of the operating levers 5, 6, 7, '8 and 9 causes the movement of rod 10 and, consequently, the rotation of shaft 25, through the pinion 28,; which, in turn, rotates thebevelled gears 35' and 36 to a point where the portion of the type-wheel 39 -carrying the character P is in alignment with the printing medium 217 and the printing hammer 47.

now rotated, the depressed port-ion of disc 175 is brought into alignment with the free end of operating member 190, whereupon rod 191 is rotated. However, just prior or about the time when the member 190 is engaging the depressed area on the disc 175, the teeth on the wheel 174, as previously described, engage the idler .171 and provide what may be termed a positive drive-con- .nection for rotating the cams whereby a more positive action is produced on the rod 191. The rotation of the rod 191 imparts 4 to the rod 194 through bevelled gears 192 and 193 a light rotary movement whereby the printing bail 195 moves to cause the movement of the printing hammer 47 into engagement with the type-wheel for effecting the impression of the character P on the printing medium.

Before the character is printed, however, the type-wheel 39 will be aligned with the bevelled extension carried by the printing hammer 47 due to the engagement thereof with the sides of the teeth cut in the rim of the wheel 38, as was previously described.

As the rod 191 is rotated, arm 206 is likewise rotated for "causing the movement of hell crank lever 207 which moves the rack 201 to the left and allows pawl 204 to engage .the next succeeding tooth so that upon the restoration of arm 206 to normal, rack 2 01'will be moved to the right and carries with it under the tension of. carriage return spring 205 the type carriage 44. As previously described, the type carriage 44 is prevented from returning with the rack 201 by the engagement of pawl 203 with the teeth of the stationary rack 200. For this condition the holding pawl 203, Fig. '23, is moved from the full line position to the dotted] position 203 Accordingly, the type carriage is moved for providing spacing between letters.

As the stop. arm 110, together with the shaft 59, continues its rotation and just prior to the completion of the cycle .of rotation thereof, the portion 117 of the member 111 engages theirregular surface of the stop arm 110, thereby causing the restoration of the release latch,116, the operating bar 114 and the member-111 to their nor-' 1 has completed its cycle lecting rods with the exception of the one carrying the cam or tripping finger 68 to be positioned to the left with respect to the locking vane 63. With such a setting of the selecting rods, the auxiliary selecting members 7 6, 77, 78 and 80 will be in a position so that the free ends thereof will be arranged, as shown in Fig. 8. It is, of course,- understood that the stop arm 110 has been released for rotation, as was described in connection with the positioning of the type-wheel 39 for the printing of the character P. As the shaft 59 continues to rotate following the setting of the selecting rods in the manner just described, the lower end of the bell crank lever 232, Figs. 12 and 13, engages a surface of the member 76 which has been positioned in this mariner by the setting of the selecting rods 60 to 64 inclusive due to the engagement of the lower portion of the bell crank lever'232. In this manner, the cam 230, controlled by .the selecting rod 62, is caused to be rotated about its pivot and since the selecting rod 62 is in its extreme right-hand position, the

latch 234 will be operated upon the engage- -ment of the cam 230 therewith so that the shaft 142 will be free to rotate until arrested by the engagement of the extension thereof with the released latch 233 (positi-oned at an angle of180 from the released latch 234. The shaft 142 will thus be revolved in a mannersimilar to that described in connection with the other shafts 137 to 141. Due to the cumulative effect produced by the positioning of the operating blocks 143 to 148, rack 10 will he moved a distanre sufficient to impartto the shaft 25 a rotary motion through the pinion 28 such that the type-wheel 39 will be rotated through an angle to position theportion of the type wheel carrying the figures or other special characters 'in alignment with the printing mechanism. \Vith the type wheel in its present position, both printing and spacing of the carriage is present as the printing bail 195 is not permitted to go its fullest extent due to the alignment of one of the shallowercut teeth with the end of the printing hammer 47. For this condition the holding pawl 203 onlymoves from the full line position of Fig. 23 to the dotted position 203 not far enough to engage the next succeeding tooth.

Following the positioning of the type ,wheel 39 in the manner just described, as-

sume that it is desired to print the numeral 6. The following set ofv selecting units would be transmitted:

No current, current, no current, current andno current. The 'eIectromagnet 5O in responding to these impulses, positions the selecting rods upon their rotation in a manner whereby the selecting cams-or tripping fingers 66 to 70 inclusive are in a position with respect to the locking vane 65 so that upon'the operation of the corresponding release latch the shafts 137 to 141 will be rotated so that the rectangular blocks secured at one end thereof, will assume the position shown in Fig. 31. VVith the operating levers 5, 6, 7, 8 and 9'in the position shown in this figure, the type'wheel 39 will be rotated through the movement of the shaft 25 to a point-- such that the numeral 6 will be in alignment with the projection on the printing hammer 47. The printing of the numeral 6 is effected in a manner similar to that described in connection *Wltll the printing of the character P. Likewise, the movement of the type carriage to effect spacing between characters is effected in a similar manner. A further description of the operation of the system in this respect is, therefore. considered unnecessary.

If it is desired to unshift the type wheel from the portion on which the numerals or other special characters are formed to the portion carrying the letters of the alphabet, the following series of selecting units must be transmitted:

Current, current, current, current and current. As before, the selecting rods 60. 61, 63 and 64 will be positioned to the left with respect to the locking vane.65. Likewise. the selecting rod 62 will be positioned to the left with respect to the locking vane 65. The selecting rod 62 being moved to the left, the cam 230 operates upon the engagement thereof with the bell crank lever 232 to the arrangement of the auxiliary selecting members 76, 78, 79 and 80 to a position whereby the extension 87 of the rod 79 is moved such that itrests on the roller 86. The release latch 233 will be opera-ted upon the .continued rotation of the selecting rod. Consequently. the shaft-142 will be revolved until arrested by the release latch 234. Due to the member 79 when this member 79 is in its position. selecting rods are rotated and due to the engagement of the bell crank lever 232 with the end of the auxiliary member 76, which is now raised,-the cam 230 will be caused to engage the release latch 233. Consequently,

extreme right-h and the shaft 142 will be free to rotate through an angle of 180 upon the operation of the release latch 233. In a manner similar to that just described, the type wheel 39 will be rotated through a relatively large angle,

that is, the portion of the type wheel carryiug the letters of the alphabet will be positioned in alignment with the printing mechanism. Likewise, the rod 191 through the movement of which the printing bail 195 is operated for moving the printing hammer 47, is rotated. However, for this selection, the type wheel 39 is in a' position whereby the wheel 38 is positioned such that one of the shallower cutteeth is in alignment with the projection on the printing hammer 47 and prevents the printing hammer from engaging the type wheel. The distance through which the printing hammer 47 is moved for this particular condition is, however, sufficient to permit the rotation of the arm 206 and the operation of the bell crank lever 207 so that the rack 201 is moved to the right and carries with-it the type carriage 44. Accordingly. the type carriage is moved to the right a distance equal to the space of one tooth.

Assume now that it is desired to return the type carriage 44 to the left for the commencement of a new line of printing. In this case, the selecting rods 60 to 64 inclusive will be positioned such that the auxiliary selecting members 81 to 85 inclusive are in a position such that the enlarged portions 126 are piled up as shown in Fig. 10. Accordingly, as the selecting rods 60 to 64 continue their rotation, bell crank lever 262 is operated for causing the movement of pawl 228 to a position such that it operates the corresponding release latches 128 and 129. The operation of either of these release latches permits the rotation of shaft 136, on one extremity of which there is secured the cam 209, the shaft 136 being rotated in a manner similar to that described in connection with the rotation of shafts 147' to 142 inclusive. The cam 209 is rotated through an angle of 180 for causing an upward movement of the rod The movement of the rod 211 upward- Thus, as the printing mechanism.

raises the bar 202 to a point where pawls 203 and 204 disengage the teeth in the racks 200 and 201 whereupon the carriage 44 is returned to its left-hand position or the position shown in Fig; 2 by the action of the carriage .return spring 205. As previously stated, the bar 202 is held operated by holding latch 212 until the carriage has been returned to its extreme left-hand position at which time plunger 213 is operated for causing the release of the holding latch 212 and the restoration of bar 202 to its normal position under the action of a retraotile spring.

Now to effect line feed or the rotation of the platen 216 to position an unprinted area of the paper 217 before the printing mechanism, it is necessary that a series of selecting units be transmitted for causing the positioning of the selecting'rods 60 to 64'with respect to the locking vane 65 such that the auxiliary selecting members 81 to 85 inelusive will be positioned, as shown in Fig.

11. With the auxiliary selecting members 81 to 85 in the position shown in Fig. 11,

bell crank lever 263 is operated upon the continued rotation of the selecting rods for causing the operation of pawl 229. The operation of pawl 229 causes the operation of either of the release latches 128 or 129 for releasing the shaft 135 for rotation. As the shaft 135 normally tends to rotate by power communicated thereto from a continuously rotating motor 93 through a friction clutch, this shaft will be rotated through an angle of 180 or. until the extension thereof engages one or the other of the release latches 128 or 129. The rotation of the shaft 135 imparts to the vertically extending shaft 220 a rotary movement whereby the beveled gears 218 and 219 are rotated for causing the rotation of shaft 215, and conse' quently the platen 216 to a position where the paper 217 is moved such that an unprinted area is now presented before the It is to be noted that during the operation of the carriage return and line feed mechanisms, it is necessary that cut-out mechanism for the printing mechanism and the spacing mechanism be provided in order to prevent the printing of characters and the spacing of the carriage on these operations. As previously described, these functions are prevented by the positioning of the wheel 38 for these operations to a position where the printing hammer gaging the type wheel 39 and the holding 'pawl 203 engaging the next succeeding tooth.

Although the invention has been disclosed and described in connection with a particular type of telegraph receiving mechanism, it is, of course,

47 is prevented from enunderstood that variations may be made without departing-from the spirit and scope of the invention.

The invention claimed is:

1. In a printing telegraph receiver, a traveling type carriage having a type carrying means movable therewith, means for se' lectively operating said type carrying means comprising a plurality of rotatable selecting members arranged to occupy either of two positions, means for retaining said members in their actuated position 011 subsequent selections until the character of the previous selection is changed, means responsive to sclecting units for permitting the members to be positioned in predetermined combinations with respect to said retaining means, and means controlled by said selecting members for selectively operating said type carrying means.

2. In a printing telegraph receiver, a traveling type carriage having atype carrying means movable therewith, means for selectively operating said tvpe carrying means comprising a plurality of rotatable and llOIlzontally movable selecting members arranged to occupy either of two positions, a locking vane for retaining said members in their actuated position, an electromagnet having an armature with a bevelled extension for causing said selecting members to be deflected to one side or the other of said locking vane depending upon the energizations of said electromagnet, and means controlled by thepositioning of said selecting members for selectively operating said type carrying means. I

3. In a printing telegraph receiver, atraveling type carriage having a type wheel movable therewith, means for selectively positioning-said type wheel comprising a plurality of selecting elements capable of rotation througha complete cycle arranged to occupy either of two selectable positions, means tending normally to rotate said elements, electromagnetic means operative for permitting the rotation of said elements and the subsequent positioning thereof in predetermined combinations, and means controlled by the setting of said selecting elements for effecting the positioning of said type wheel to bring the desired character into printing position.

.4. In a printing telegraph receiver, a traveling type carriage having type carrying means movable therewith, means for selectively operating said type carrying means con'iprising a plurality of selecting elements capable of rotation through a complete cycle and arranged to occupy either of two positions, members carried by each of said elements. means tending normally to rotate said elements, a single electromagnet operative for causing the release of said elements, and-a subsequent positioning having a type wheel movable means for selectively positioning said type' character into thereof whereby said members are set in predetermined combinations, and means cootrolled by said members for selectively operating said type carrying means.

. 5. In a printing telegraph receiver, a travelling type carriage having a rotatable type wheel movable therewith, means for selectively positioning said type wheel comprising a member movable througl'i varying distances, actuating means therefor consisting of a set of rotatable shafts, connecting levers movable in accordance with the rotation of said shafts, and means linked with said connecting levers and said member for transmitting the cumulative effect of said shafts whereby said member is moved a predetermined distance to selectively position the desired character in a printing position. a

6. In a printing telegraph receiver, a traveling type carriage having a type wheel movable therewith, a member movable through varying distances, actuating means therefor comprising av set of rotatable shafts, means tending normally to rotate said shafts, connecting levers movable in accordance with the rotation of said shafts, and means for selectively releasing desired ones of said shafts whereby the cumulative effect of the shafts is transmitted by said levers to cause a corresponding movement of said member to position the desired character carried by said type wheel in a printing position.

In a printing telegraph receiver, a traveling type carriage having a type wheel arranged to be selectively rotated to a printing position, means for selectively positioning said type wheel comprising a set of rotatable shafts, rotatable in an invariable direction, each arranged by a half revolution thereof to impart a definite and characteristic degree of rotation to said type wheel, and means selectively operable to permit a half revolution of selected ones of said shafts to produce a desired cumulative rotation of said type wheel.

8. In a printing telegraph receiver, a stationary platen, a travelling type carriage therewith,

wheel to bring av desired printing position with respect to said platen comprising a set of rotatable shafts. each arranged by a half revolution thereof to impart a definite and characteristic degree of rotation to said type wheel, a pair of stops for each shaft for holding said shafts against rotation in either of two diametrically opposite positions, means tending normally to rotate said shafts and selecting mechanism 'under the control of line impulses for tripping selected ones of said stops and permitting a half rotation of the shafts associated therewith whereby a

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