US2935934A - Printing mechanisms - Google Patents

Description

May 10, 1960 P, .wlLLlAMS ETAL PRINTING MECHANISMS 4 Sheets-Sheet 1 Filed June 23, 1958 21 INVENTORS PAUL H. WILLIAMS ALBERT J.GREEN ROBERT E. SCHAEFER HAROLD A. LONG V in l .33

May 10, 1960 w s ET AL 2,935,934

PRINTING MECHANISMS Filed June 23, 1958 4 Sheets-Sheet 2 III Illll I lll l llgilllilllflgfllllill11!; I

INVENTORS A PAUL H. WILLIAMS ALBERT J. GREEN ROBERT E.SCHAEFER HAROLD A. LONG TZIR ATTORNEYS May 10, 1960 P, w A s ETAL 2,935,934

PRINTING MECHANISMS Filed June 23, 1958 4 Sheets-Sheet 3 270' ll-imih INVENTORS PAUL H. WILLIAMS ALBERT J. GREEN ROBERT E. SCHAE FER HAROLD A. LONG BY f M BAI QB May 10, 1960 p, w ET AL 2,935,934

PRINTING MECHANISMS Filed June 25, 1958 4 Sheets-Sheet 4 W FIGJI J INVENTORS PAUL H. WILLIAMS ALBERT J. GREEN ROBERT E. SCHAEFER HAROLD A.LONG

' ted Stats PRINTING MECHANISMS Application June 23, 1958, Serial No. 743,842

10 Claims. c1. mi e-s This invention relates to improvements in type-setting and printing mechanisms.

The invention is disclosed, applied to machines of the type shown in United States Patents No. 1,865,147, issued to Bernis M. Shipley on June 28, 1932, and No. 2,625,- 322, issued to Frank B. Moser on January 13, 1953.

It is an object of the present invention to provide a printing means for printing off a special ribbon containing magnetic ink, whereby data can be printed on record material which is later adapted to control a magnetic pick-up device to read data from the record material.

Another object of the invention is to provide a self- .contained printing mechanism which is controlled from the dilferential mechanism of a machine of the type shown and described in the above-mentioned patents, and which type is controlled by electric circuits set in the machine of said patents.

A specific object of the invention is to provide a printing means which acts to uniformly transfer the magnetic ink from a ribbon to the record medium.

A specific object of the a invention is to provide a printing platen which is not only given a blow to strike the type carrier, but also shifted sidewise as the blow is given to set up a friction action between the ribbon and the type carrier, to obtain uniform prints.

With these and incidental objects in View, theinvention includes certain novel features of construction and combinations'of parts, a preferred form or embodiment of which will be hereinafter described with reference to the drawings which accompany and form a part of this specification.

Of said drawings:

Fig. 1 is a sectional view taken through the printing section of the printing mechanism.

Fig. 2 is a detail view showing the cam for operating the ribbon feed.

Fig. 3 is a detail view of a means for locking out the symbol-printing type carrier during certain operations of the machine.

Fig. 4 is a sectional view taken through the mechanism for controlling the setting of the printing wheels.

Fig. 5 is a detail view of the machine release mechanlsm.

Fig. 6 is a detail view of a part of the mechanism shown in Fig. 7.

Fig. 7 is a detail view of the printing platen mechanism.

Fig. 8 is a front elevational view, showing the typesetting connections from the electrical controls shown in Fig.4.

Fig. 9 is a front elevational view of certain of the mechanism shown in Fig. 1.

Fig. 10 is a detail view showing the switching mechanism, together with a part of the mechanism located in the accounting machine, for controlling the setting of the type wheels.

R 2,935,934 Patented May 10, 196i) Accounting machine switch setting mechanism As is well known, in machines of the type shown and described in the above-mentioned patents, an indicator link (Fig. 10) is adjusted under control of dilferen- I ing machine keyboard. The connection isnormally for the purpose of setting indicators through a segment 17, to indicatethe amount entered into the machine. The indicator segment 16 has attached thereto a rack 18, which meshes with a pinion 19, carried on a bracket 20, supported by the back frame of the accounting machine. The bracket 20 carries a stud 22, on which the pinion 19 rotates. The bracket 20 also supports a shaft 23, on which a gear 24 is rotatably mounted. The gear 24 is connected to a switch arm 25 (Fig. 11) for even-numbered digits, and to a switch arm 26 for odd-numbered digits. These arms 25 and 26 are shown diagrammatically in Fig. 11. The switch arms 25 and 26 close circuits by means of contacts Z7, as is well known in the art.

When an odd-numbered digit, such as the digit 1, is entered, the switch arm 26 is arrested when it comes into contact with the contact 27-1 (Fig. 11). When the digit 2, for example, is entered, the switch arm 25 comes to rest on the contact 27-2 (Fig. 11). These switches control the setting of corresponding data in the printing mechanism in a manner to be described hereinafter.

An aliner 28 (Fig. 10) is pivoted on a shaft 29 and is secured to, an arm 30, which is operated by a notched arm 31 during each machine operation to maintain the segment 16 and the switch and in a set position during the machine operation.

Printer-operating mechanism The printer is operated by a motor 35 (Figs. 4 and 5) independently of the operation of the accounting machine. The motor 35 is provided with an armature 36, on which is mounted a pulley 37 (Fig. 5). The pulley 37 operates a second pulley 38, by a belt 39. Secured to the pulley 38, and mounted on a shaft 40, is a gear 41. The gear 41 meshes with a gear 42 connected to a pinion 43 mounted on a stud 44. The pinion 43 meshes with a gear 45 rotatably mounted on a stud 46, and connected to the gear 45 is a pinion 47. The pinion 47 meshes with a gear 48, to which one member 49 of a clutch is secured.

When during the operation of the machine the motor 35 is released for operation, the clutch member 49 is rotated clockwise (Fig. 5). When it is desired to operate the printer, a solenoid 5b is energized to withdraw a link 51 and rock a clutch control pawl 52 clockwise (Fig.

5). The lower end of the clutch pawl 52 engages a toe on a clutch pawl 53, which is spring-urged, by a spring 54, to engage the clutch member 49. Normally, the clutch pawl 52 prevents the spring 54 from rocking the clutch pawl 53. However, when the solenoid 50 is energized to rock the pawl 52 clockwise, it withdraws the lower end or" the pawl 52 from engagement with the toe on the pawl 53, whereupon the spring 54 rocks the pawl 53 clockwise to engage one of the shoulders on the clutch member 49, in the manner well known in the art. The pawl 53 is pivotally mounted on a disk 55, secured to the printer cam shaft 56 (see also Fig. 4). At the end of the cycle of operation, a spring 57 (Figs. 4 and 5) returns the clutch pawl 52 into the path of the toe on the pawl 53, and therefore, when the toe comes into engagement with the lower end of the pawl 52, it is rocked out of engagement with the clutch member 49.

Type-wheel-setting mechanism project through side frame 72 and into a left side frame Each ring gear 62 is con- 73, as illustrated in Fig. 8. nected to a ring gear 75 through the square shaft 63. The ring gears 75 are located between the frames 72 and 73 and mesh with a differentially-settable disk 76 (Fig. 4). The differentially-settable disk 76 is provided with a stud 77, on which a latch pawl 78 is pivoted. The latch pawl is provided with a stud 79, which projects into a notch in a driving segment 80. A driving segment 80 is provided for each type-wheel-setting mechanism, and the driving segments are all pinned to a shaft 81, on which the differential disks 76 are rotatably mounted. Also secured to the shaft 81 is a segment 82, meshing with'a segment 83 pivoted on a shaft 84 carried between the frames 72 and 73. The segment 83 is provided with two anti-friction rollers 85, which engage with cam plates 86 on the cam shaft 56.

When the cam shaft 56 is rotated, the cam plates 86, cooperating with the rollers 85, rock the segment 83 first counter-clockwise (Fig. 4) and then back clockwise to its normal position. Counter-clockwise movement of the segment 83 rocks the segment 82 clockwise, thus rocking the actuators 80 clockwise. Clockwise movement of the actuators 80, through the stud 79 and the pawl 78, rocks the differential setting member 76 clockwise until it is arrested by a pawl 87 or 88, in a manner described hereinafter. The pawls 87 and 88 are moved into the path of movement of shoulders 94 at a proper time, as will be described, and arrest the differential disk 76, thus causing the latch pawl 78 to rock counter-clockwise on the stud 77 and move a stud 89 thereon into a notch 90 of be positioned to engage contact 2 (Fig. 11).

an alining and locking bar 91, carried on a pair of rods The pawls 87 and 88 are moved into the path of movement of the shoulders 94 on the differentially settable disk 76, under control of the amount differential switches, shown in Fig. 10, of the accounting machine. When the differentially settable disk 76 is actuated, it will actuate the gear 75 a like extent and, through the square shaft 63 and the ring gear 62, adjust the type wheel 60 in accordance with the setting of the differentially settable disk 76. As before mentioned, a differentially settable mechanism is provided for setting each type wheel 60.

The pawls 87 and 88 are rocked under control of the switch (Fig. 10) when a switch arm 25 or 26 is positioned in accordance with the value of the key depressed on the accounting machine keyboard. The pawl 87 is pivotally mounted on a stud 95 and is spring-urged, by a spring 96, to urge the free end of the pawl 87 into the path of movement of the shoulders 94- on the differentially settable disk 76. Normally, the spring 96 cannot rock the pawl 87, inasmuch as the pawl is restrained by the armature 97 of the solenoid 98, which engages a shoulder on the pawl 87. When the solenoid is energized according whereas the, solenoid 102 is energized under control of the odd-numbered digit keys. The purpose of providing the two pawls 87 and 88, for arresting the differentials 76, is to provide more time for permitting the pawl 87 or .4 88 to drop into position in the path of movement of the shoulders 94. By providing separate pawls for the even and odd numbers, a greater spacing of the shoulders 94 on the differentially settable member 76 is possible.

To control the time of energization of the solenoids 98 or .1132, a scanning switch 105 (Figs. 4 and 11) is provided. The scanning switch is mounted on a pair of studs 106 and 107, carried by the side frame 71. The rotor 108 of the scanning switch 105 is rotated on a stud 109. The rotor 108 of the scanning switch 105 is secured to a gear 115, meshing with a gear 116, rotatably mounted on a shaft 117, and the gear 116 meshes with teeth of the segment 82. Also meshing with the gear is a pinion 114, rotatably mounted on a shaft 118, and the pinion 114 is secured to a gear 119 in mesh with a gear 128. The gear 12! is mounted on a shaft 121 and is also connected to a rotor 122 of a switch 123 supported on rods 124 and 125.

When the differentially settable member 76 is adjusted according to the value of the key depressed in the accounting machine, the rotors 108 and 122 move to a corresponding position. It will be noted that the rotor 122 moves twice the distance of the rotor 108. This is to give sufficient time for the rotor 108 to be properly set before the rotor 122 is set. The difference in extent of rotation is effected by gearing down the movement.

of the rotor 122 by the pinion 114 and the gear 1.19.

Referring now to the circuit diagram in Fig. 11, and assuming that a 2 key has been depressed in the amount bank of the accounting machine, the switch arm 25 will Now then, when the scanning switch rotor 188 reaches the 2 position, a circuit will be closed between the 2 position of the rotor in the accounting machine and the 2 position in the scanning switch 105. The rotor 108 is connected to all of the contacts in the switch 123, and therefore, when the rotor 122 contacts a live contact in the switch 123, the circuit will be closed through the solenoid 98 after a control switch 138 is closed. The control switch is closed at the proper time during the machine operation. Assuming that the digit 2 has been set up on the accounting machine keyboard, the circuit will be as follows:

From one side of the power line 131, the circuit is closed through switch 130, rotor 122 of the scanning switch 123, to switch contact and lead 136, bus bar 137, lead 1328, switch rotor 168, line 132, contact 27-2, switch arm 25, line 133, through the solenoid 98, line 134, to the other side of the power line.

Fig. 11 also shows a circuit for the odd-numbered digits and is illustrated with the 1 entered in the accounting machine. In this condition, the circuit will be closed through the line 1311, switch 130, rotor 122, bus bar 137, line 138, rotor 188, line 140, contact '271, switch arm 26, line 141, solenoids 102, back to the other side 135 of the power line.

Fig. 11 shows only the two circuits; that is, the circuit for connecting the odd number, or 1, digit, and the circuit for connecting the even number, or 2, digit. Each digit from 1 to 9 is provided with a separate circuit, such as the circuits 1'32 and 148. The two circuits shown have been shown as illustrations and have been limited to these two circuits for the sake of simplicity.

When no key is depressed in a key bank, the switch arms 25 and 26 are arrested in zero position by a mechanical means and not through solenoids, as in the case of digits 1 to 9. To effect the zero setting of switch arms 25 and 26, a stud 311 is provided on each differentially settable disk 76 (Fig. 4) and is located in a position wherein it strikes the surface 142 of the locking bar 91, when the disk 76 reaches Zero position.

' Type wheel aliner 7 After the type wheels 60 have been adjusted, an aliner 145 (Fig. 1), mounted on the shaft 146, is rocked to of rollers 149 are mounted on a cam arm 150,"'pivoted on a shaft 151. The lower end of the cam arm 150 is connected to a link 152, pivoted to a ring 153, mounted on a disk 64 on the transmission line 65. The ring '153 is provided with a bifurcation 154, engaging a stud 155 on a bell crank 156, pivoted on a shaft 157. The bell crank 156 is provided with a roller 158, which is held in engagement with the back side of the aliner arm 145 by a spring 161 stretched between a stud on the link 152 and a stud 161 on the lower end of the cam arm 150.

When the cam shaft 56 is rotated, the cam arm 150 is rocked counter-clockwise (Fig. 1), thus pulling on the spring 160 and, through the spring 168, moving the link 152 rightwardly and rocking the ring 153 counter-clockwise (Fig. 1) to rock the bell crank 156 clockwise to press the roller 158 against the aliner arm 145, to move the aliner tooth 147 into engagement with a notch in the type wheels 60, and positively lock the type Wheels in set position.

The connection between the cam arm 1'50 and the link 152 is flexible, and the spring 160 maintains, normally, a stud 161 in the left-hand end of a slot 162 of the link 1'52.

Ring gear aliner The ring gear 62 (Fig. 1) is also alined in a set position by an aliner 165 (Fig. l), pivoted on a stud 166. The aliner 165 is provided with a roller 167, which is impinged between a spring-actuated arm 1'68 and an arm 169 by a spring 178. Both arms 168 and 169 are pivoted on a shaft 164. The lower end of the arm 169 has pivoted thereto a link 171, which in turn is pivoted to a cam arm 172, on the shaft 151, and which is provided with rollers, similar to the rollers 149, which coact with cam plates (not shown) similar to the cams 148; The link 171 and the cam arm 172 are r siliently held in home position by aspring 163.

When the shaft 56 is rotated, the respective cams rock the arm 172 counter-clockwise (Fig. 1) about the shaft 151, thus raising the link 1'71 and rocking the arm 169 counter-clockwise against the pull of the spring 163. Counter-clockwise movement of the arm 169, through the spring-actuated arm 168, engages the roller 1-67 and rocks the aliner 165 into engagement with alining notches in the ring gear 62. As the cam reaches home position, the spring 1 63 restores the arm 172, the link 1711, and the arm 169 to home position to withdraw the aliner 165 from engagement with the ring gears 62.

Printing mechanism After the type wheels 60 have been properly set and alined, the printing mechanism is actuated to impinge a tape against the record, upon which the printing is to take place, and the type wheels. The tape used in the printing mechanism is shown and described in the copending application Serial No. 733,141, filed by Theodore Maierson et al. on May 5, 1958. The tape shown in said application is one in which magnetic material in a binder is applied in a stippling manner to a thin backing web made of strong film materal, such as Mylar, which is a polyethylene terephthalate, of a thickness of approximately .0005", and the coating has a profusion of closelyspaced specks of ink caused by the stippling, which specks are practically invisible to the unaided eye because of their small dimensions and close proximity. The

186, with which a plurality of feed pawls 187 engage. The feed pawls 187 are mounted on a rocking plate188 and are spring-urged into engagement with the ratchet disk 186. The plate 188 is rotatable about the center of the rewind spool and has, at its upper end, a stud 189 engaging in a slot 190 of a feed link 191. A spring 192 maintains the stud 189 in the left-hand end of the slot 190 and tends to move the link 191 into its left-hand position. The right-hand end of the link 191 is pivoted on a stud 193 mounted on a cam arm 194, pivoted on the beforementioned shaft 151 (see also Fig. 2). The upper end of the cam arm 194 is provided with a roller 195, which is engaged by a cam plate 196 to move the link 191 toward the left and rock the plate188 counter-clockwise (Fig. 1), atwhich time the feed pawls ratchet over the ratchet disk 186. During the return stroke of the cam arm 194, as the cam arm moves to its home position, the cam 196, operating on the roller 195, restores the link 191 rightwardly back to its home position, thus rocking the feed plate 188 clockwise, during which time the feed pawls 187 engage the ratchet disk 186 and rotate the rewind spool one step;

The usual feed control device is provided, which comprises a feeler 200 (Fig. 1) normally lying against the outer diameter of the tape on the rewind spool. As the spool increases in diameter, the feeler 200 is rocked counter-clockwise around the stud 201, whereupon a stop member 202 is moved around the stud 281. The stop member 202 is formed to coact with a stud 203 on the feed plate 188, so that the feed plate 188 is rocked counter-clockwise an extent determined by the position of the stop member 202. As the diameter of the rewind roll increases, the feeler 200 is moved outwardly and moves a higher portion of the plate into the path of the stud 203, thus limiting the extent of rocking movement of the feed plate 188. The outer edge of the stop member 202 is developed to cause the extent of feed of the film to be the same, no matter what the diameter of the rewound film may happen to be. A spring 204 normally holds the feeler 208 against the outer diameter of the rewound film.

Printing hammer mechanism The printing platen is so constructed that, as the platen strikes the ribbon and the type wheel, the platen is given a slight sidewise movement to in effect rub the magnetic ink material onto the record material, by sliding it slightly across the face of the type character. Also, the platen is constructed to dwell on the type at the time of impact. This is necessary,'inasmuch as an ordinary blow does not make uniform impressions of the magnetic material on the record material. A separate platen 210 is provided for each type wheel. The platens 210 are slidably mounted in a frame 211 (Fig. 7), and a shoulder 212 thereon is normally held in engagement with a bar 213 carried by a yoke 214. A spring 215 holds the shoulder 212 against the bar 213. The yoke 214 comprises two arms 214 connected by the bar213. The arms 214 are secured to the rotatable shaft 216 and support a rod 217 between them, and therod 217 is engaged by plates 218, loose on the shaft 216. A spring 219, connected to each arm 218, normally'maintains the arms 218 in engagement with the rod 217. The arms 214 have rearwardly-extending fingers 220, carrying a rod 221 between them. The rod 221 extends into a bifurcated arm of a cam follower arm 222, pivoted on the shaft 151. The upper end of the cam follower arm is provided with a roller 223, normally held in engagement with a cam 224 by a spring 225. The cam magnetic coating in the binderis called magnetic ink,

224 is secured to the cam shaft 56. Also formed onjthe cam follower arm 222 is a flange 226, engaging the outer periphery of the earn 224 at certain times, in the manner presently described.

Each arm 218 is provided with an upstanding finger 230, each of which is engaged by an arm 231, pivoted on a shaft 232. The arms 231 are connected by a bail 233 (see Fig. 6). A spring 234, connected to each one of the arms 231 and to a stud 235 inthe framework of the machine, maintains-the arms 231 in engagement with the end.

of the fingers 231. Loosely mounted on the shaft .232is a hammer 236, one for each printing wheel. The hammers 236 are arranged side by side, as shown in Fig. 9. The upper end of the hammer 236 is enlarged to provide extra weight to give the hammer a needed mass, as hereinafter described. The hammer 236 is provided with an insert 237, which is set in resilient material 238, such as rubber. The purpose of the rubber insert 238 is to provide an increase in contact time against the ribbon; that is, to increase the time during which pressure is exerted against the ribbon to obtain a better imprint from the magnetic ink. Tests have shown that a quick blow by the hammer does not transfer sufiicient magnetic ink to obtain usable impressions.

There are four factors contributing to the successful printing for use by a pick-up device when the records are fed through an analyzing machine, which are as follows:

(1) The mass of the hammer, which is obtained by properly weighting the head of the hammer 236;

(2) The force applied by the spring 234;

(3) The velocity of the hammer 236; and

(4) The resilience of the rubber insert 238.

When these four factors are properly balanced, a certain dwell and pressure is applied at the point of impact.

When the cam shaft 56 rotates clockwise, the periphery of the cam plate 224 acts on the roller 223. Just prior to the time that the printing is to be effected, the roller 223 moves from contact with the periphery of the cam plate 224 and rides over a notched section 239 (Fig. 7).' At this time, the flange 226 rides on the periphery of the cam plate 224, and, as the notched section 239 moves out from under the flange 226, the spring 225 whips the cam arm 222 clockwise, thus rocking the yoke 214, including the two fingers 220, the rod 221, and the arms 214, counterclockwise (Fig. 7) to lower the bar 213 attached to the arms 214 to free the platen 216, and at the same time withdraw the ends 236 of the arms 218 from beneath the finger 231 of the hammer-operating yoke. At this time, the strong springs 234, acting through the bail 233, whip the hammer 236 counter-clockwise, impelling the insert 237 against the top of the platen 210, and driving said platen down against the type 60. The lower end of the platen 210 is slightly beveled, as at 240, and therefore, as the platen is engaged with the type as above described, the lower end of the platen is cammed sidewise a slight extent, due to the action of the bevel 240 on the type carriers and the sliding fit of the platen 210 in the frame'211. This sidewise shifting causes a rubbing action on the printing film, to rub the magnetic material onto the record material, which, taken with the dwell at the time of impact, 'causes a good print to be made on the record material.

After the impression has been made, the hammers 236 are restored to their normal position by a rod 245 (Figs. 1, 3, and 7), carried on the upper end of a pair of arms 246, secured to a shaft 232. Also secured to the shaft 232 is a pinion 247, meshing with a segment 249 on a shaft 251. A similar pinion, which meshes with the teeth of a segment 250, is mounted on the opposite end'of'the shaft 232. The segments 24? and 250 are pinned to the shaft 251. A spring 252 normally tends to rotate the segments 249 and 250 clockwise, but is limited in its movement by the engagement of a roller 253 on the segment 250 with the upper end of a cam arm 254. Se-

cured to the cam arm 254 is a roller 255, which is held in engagement with a. cam 256, on the cam shaft 56, by the spring 252. The cam arm 254 is pivoted on the shaft 151. Action of the spring 252 against the upper end of the arm 254 maintains the roller 255 in engagement with the cam 256. Rotation of the cam 256 when the cam shaft 56 is operated permits the cam arm 254 to rock clockwise, thus permitting the segments 249 and 250 to rock clockwise, to rock the pinions 247 counter-clockwise to move the rod 245 counter-clockwise, thus permitting the hammers to operate in the manner above described. After the hammers have completed their printing operation, the cam 256 reverses movement of the cam arm 254. thus rocking the segments 24-; and 250 counterclockwise, and rotating the arms 246 and the rod 245 clockwise back to their home positions, during which time the rod 245 engages the hammer arms 236 and restores them against the action of the strong springs 234. At this time, the ends 230 of the arms 218 again move beneath the arms 231 to maintain the hammers 236 in the restored, or cocked, position.

The printing mechanism also includes a platen 260 (Fig. 3), for printing a special symbol. During certain operations, it is desired to suppress the printing of this symbol. The symbol-printing platen 260 is provided with a shoulder 261, which may be engaged by a finger 262. The finger 262 is secured to a shaft 263, to which an arm 264 is also secured. The finger 262 and the am 264 are normally depressed by a roller 265 on the lower end of the arm 246, above described, but in the normal position the roller 265 engages the upper end of the arm 264 to maintain the'finger 262 in the position shown. However, when the rod 245 is moved to release the printing hammer, the roller 265 is removed from contact with the arm 264. If at this time the platen 260 is still in its upper position, the finger 262 can move beneaththe shoulder 261 and prevent operation thereof by its respective hammer 236. Movement of the finger 262 is controlled by a manually-set lever 268 pivoted on a shaft 269. An

aliner 270 is spring-urged to maintain a stud 271 in engagement with the alining notch on the segment 268 by a spring 271. The segment 268 is provided with teeth meshing with a ring gear 273. The ring gear 273 is connected to a disk 259 by a square shaft 63 and pinions thereon. The disk 259 has a notch 274 in its periphery.

A stud, 275 lies adjacent the periphery of the ring 273 and is held in such contact position by a spring 276. The stud 275 is carried on a lever 277 pivoted on a shaft 278 and is connected to the arm 264 by a link 279.

As before described, the roller 265 normally holds the arm 264 depressed and, through the link 279, holds the lever 277 in a position wherein the stud 275 cannot enter the notch 274. As soon as the machine begins its operation, the roller 265 is rocked away from above the arm 264, thus freeing the arm 264 to the action of the spring 276.

If the lever 268, together with the segment formed thereon, is moved far enough to move the notch 274 into the path of movement of the stud 275, the spring 276 moves the stud 275 into the notch, thus raising the link 279, rocking the arm 264 and the finger 262 to move the finger 262 underneath the shoulder .261. T hereupon, after the hammer 264 for the symbol-printing platen is released, the platen cannot move, since the finger 262 locks it against such movement. In this case, no symbol will be printed.

When the check or other record-receiving material is placed onthe slip table 183, feed rollers 300 and 301, together with other feeding mechanism, move the record material into proper position to receive the impression. This mechanism is not described herein, inasmuch as it forms a part of a separate application, where it is fully described.

While the form of mechanism shown and described herein is admirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to confine the invention to the former embodiment disclosed herein, for it is susceptible of embodiment in various other forms.

What is claimed is: V

1. In a machine of the class described, the combination of a type carrier, a platen engageable with the type carrier to cause printed impressions to be made, a hammer to strike the platen to force the platen against the type carrier, a guide to guide the platen intoengagement with the type carrier, the engaging surface of the platen being beveled at an angle to the direction of movement of the platen, said bevel causing the platen to shift sidewise to set upa rubbing action against the type carrier, and power means to drive thehammer against the platen.

2. In a' machine of the class described, the combination of a type cam'er,.a platen engageable with the type carrier to cause printed impressions to be made, a hammer to strike the platen to force the platen against the type carrier, a guide to guide the platen into engagement with the type carrier, the engaging surface of the platen being beveled at an angle to the movement of the platen, 3 said bevel causing the platen to be shifted sidewise to set up a rubbing action against the type carrier, and power means to drive the hammer against the end of the plat-,

en opposite the beveled end thereof. 7

3. In a machine of the class'described, the combination of a type carrier, a tape coated with magnetic ink, a platen engageable with the tape and the type carrier to cause printed impressions to be made, a hammer to strike the platen to force the platen against the tape and the type carrier, a guide to guide theplaten into engagement with the tape and the type carrier, the engaging surface of the platen being beveled at an angle to the movement of the platen, said bevel causing the platen to be shifted sidewise to set up arubbing'action against the tape and the type carrier, and power means to drive the hammer against the platen.

4. In a machine of the class described, the combination of a type carrier, a tape coated with magnetic ink, a platen engageable with the tape and the type carrier to cause magnetic printing impressions "to be made on record material, a hammer to strike the platen to force the platen against the tape, the record material, and the type carrier, a guide to guide the platen into engagement with the tape, the record material, and the type carrier, the engaging surface of the-platen being beveled at an angle to the movement of the platen, said bevel causing the platen to be shifted sidewise to set up a rubbing action against the tape tothereby rub the magnetic ink onto the record material, and power means to' drive the hammer against the platen.

5. In a machine of the class described, the combination of indicator setting mechanism, a type carrier, difand the said control means to control the extent ofmovement of the type carrier, a tape covered with magnetic ink, a platen engageable with the tape and the type carrier to cause magnetic impressions to be made on record material, a hammer to strike the platen to force the platen against the tape and the type carrier, a guide to guide the platen into engagement with the tape and the type carrier, the engaging surface of the platen being beveled at an angle to the movement of the platen, said bevel causing the platen to move sidewise to set up a rubbing action against the tape, the record material,

and the type carrier, to cause a magnetic print to be made upon the record material, and power means to drive the hammer against the platen.

6. In a machine of the class described, the combination of a rotatable type wheel, aplaten engageable with the type wheel to cause printed impressions to be made, a hammer to strike the platen to force the platen against the type wheel, a guide to guide the platen into engagement withthe type wheel, the engaging surface of the platen being beveled at an angle to the direction of movement of the platen, said bevel causing the type wheel 4 the type wheel, a guide to guide the platen into engage '10' to receive a slight rotary movement to thereby set up a rubbing action against the type wheel, and power means to drive the hammer against the platen.

7. In a. machine of the class described, the combination 'of a rotatable type wheel, a platen engageable with the type wheel to cause printed impressions to be made, a hammer to strike the platen to force the platen against ment with the type wheel, the engaging surface of the platen being beveled at an angle to the direction of movement of the platen, said bevel causing the type wheel to receive a slight rotating movement to thereby set up a rubbing action against the type wheel, and power means to drive the hammer against the end of the platen' opposite the beveled end thereof.

8. In a machine of the class described, the combination of a type wheel, a tape coated with magnetic ink, a platen engageable with the'tape and the type wheel to cause printed impressions to be made, a hammer to strike the platen to force the platen against the tape and the type wheel, a guide to guide the platen into engagement with the tape and the type wheel, the engaging surface of the platen being beveled at an angle to the movement of the platen, said bevel causing the type wheel to receive a slight rotating movement to thereby set up a rubbing action against the tape and the type wheel, and power means to drive the hammer against I the platen. r

9.. In a machine ofthe class described, the combination of a'rotatable type carrier, a tape coated with magnetic ink, a platen engageable with the tape and the type carrier to cause magnetic printing impressions to be made on record material, a hammer to strike the platen to force the platen against the tape, the record material, and the type carrier, a guide to guide the platen into engagement with the tape, the record material, and the type carrier, the engaging surface of the platen being beveled at an angle to the direction of movement of the platen, said bevel causing the platen engaging and rotating the type wheel to set up a rubbing action against the tape to thereby rub the magnetic ink onto the record material, and power means to drive the hammer against the platen.

10. In a machine of the class described, the combination of indicator setting mechanism, a type carrier, differential means to control the positioning of the type carrier, connections between the indicator setting means and the said control means to control the extent of movement of the type carrier, a tape covered with magnetic ink, a platen engageable with the tape and the type carrier to cause magnetic impressions to be made on record material, a hammer to strike the platen to force netic print to be made upon the record material, and

power means to drive the hammer against the platen.

References Cited the file of this patent UNITED STATES PATENTS 1,277,119 Quigley Aug. 27, 1918 1,360,379 Dyer *Nov. 30, 1920 2,251,162 Payne July 29, 1941 2,791,310

Jones May 7, 1957

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