US1035354A - Signal-transmitter. - Google Patents

Description

W. KAISLING. SIGNAL TRANSMITTER. APPLIGATION FILED MAR. 21, 1910v 1,035,354 1 Patented Au 13, 1912.

3 SHEE TSSHEET 1.

, W. KAISLING.

SIGNAL TRANSMITTER.

- APPLICATION FILED MAR. 21, 1910 1,035,354. Patented Aug. 13, 1912.

3 SHFETSSHEET 2.

W. KAISLING.

SIGNAL TRANSMITTER.

APPLICATION FILED MAR. 21, 1910. ii ,@35,35 1, Patented Aug. 13, 1912.

s SHEETS-SHEET s.

BiF'IEZI'W UNITED STATES PATENT OFFICE.

WILLIAM 'xalsmzvc, or cmoaco, ILLIivoIs, ASSIGNOR To A CORPORATION or & SUPPLY COMPANY,

KELLOGG, swrrcrzs'oani) ILLINOIS.

SIGNAL-TRANSMITTER.

Specification of Letters Patent.

I Patented u 13,1912.

Original application filed lay 3, 1907-, Serial No. 371,641. Divided and this application filed March 21,.

To all whom it may concern:

Be it known'that I, WILLIAM KAISLING, a citizen of the United States, and resident of Chic-ago, county of Cook, State of Illinois, have invented certain newand useful Improvements in Signal-Transmitters, of which the following is a specification.

The present invention relates to signal transmitters of the type commonly employed in automatic and semi-automatic telephony for the purpose of transmitting current impulses to 'direct ively operate associated switch mechanism.

The principal object of the invention is to provi e a device of this sort which shall be certain and eflicient in operation, simple in construction and economical to manufactrated and described ture.

The present application is a division of my application Serial N 0.371541, filed May 3, 1907, for a telephone support, and the invention herein claimed is accordingly illusas part of a telephone desk-stand in which the transmitter forms the base for a standard which carries the transmitter and switch-hook at its upper end.

The many features. and'advantages of the' transmitter structure herein described will be better understood upon reference to the following detailed description taken in connection with the accompanying drawing, and the scope of the invention will be ar ticularly pointed out in the appended claims. In the drawing, Figure 1 is an elevation of a desk-stand embodying as part of its structure a signal transmitter'constructed in accordance with my invention, parts being shown in section and brokenaway for clearness; Figs. 2 and 3 are detail views illustrating the .connection between the transmitter and the standard or pedestal; Fig. 4 is a plan viewof the base showing a portion of the finger-hold mechanism in detail and the standard in section, the section being takenon a of Fig. 1; Fig. 5 is a bottom plan view of the call mechanism as viewed after the removal of the bottom plate of the basal casing; Fig. 6 is a side elevation of a control magnet employed insuch mechanism; Fig. 7 is a detail'view illustrating the switchhook contacts and the actuating means thereillustrating ing and construction; Fig. 14 s a diagram tail views of, a

plane indicated by the line a-a' 1910. Serial No. 550,663.

ciated gearing, the control magnet therefor, and a condenser; Fig. 11 is a vertical section of the b b-b of Fig. of the arrows; tailed view cry of the Fig. 11 is. an enlarged deshowing a portion of the periphfeatures of. the governor mount,

of a portion of an automatic telephone cir-,

cuit, illustrating particularly the electrical- I I connections to the apparatus other figures; and Figs. 15

modified finger-hold mechanism, the

shown, in the construction of section of Fig.

l 5 being taken on a plane indicated by thev line 050 of Fig. 16.

Throughout these views,

refer to like parts. p y

Referring to the drawing in detail, it will be observed that the desk-stand includes a like characters of certain spring-contact a view similar to Fig. supporting plate .removed, showing the governor and its assoase and its contained mecha-- nism, taken on a plane indicated by the line 5 and viewed 1n the direction base; Figs. 12'andl3 are views and 16 are dc-j baseA, which is preferably circular, a stand-v ard B, preferably extending from the center of said base, a transmitter C cured to the upper end of the standard, and a switch-hook D pivotally secured to the standard B near'its upper end and operatively connected to the mechanism contained in the base A. The transmitter C maybe of any .preferred construction and in itself pivotally sethe weight of the upper portion of the structure and to permit the passag of the con motion between the switch-hook .and the mechanism in the base 4 and preferably com I 'PIISGS an inner metallic tube 10, an outer.

tube 11 of rubber, ebonite or other suitable vided with a suitable opening or passagel t through which leads may extend from the,

transmitter terminals to the interior of the I standard B, from which point theyare led through the base, as hereinaftermore particularly pointed out. The upper end of the cap 12' is provided with a transverse pin which is rigidly secured to the cap, preferably by means of screws 17 and the plate 18 and the adjacent portion of the transmitter shell 15 are arranged to tightly engage the pin 16 to thereby provide a frictional connection between the transmitter and the standard so that the transmitter will remain in any'position to which it is moved by the user of the instrument.

The shell 15 is composed of springy material which is punched out in the manner indicated in Fig. 2 to provide a bearing surface for the pin 16; and the plate 18, which in the present case is more rigid, is provided with a similar bearing for the pin 16; but these bearing surfaces are so constructed that, Without subjecting the shell 15 to flexure, the portions'of the plate and shell on either side of the pin 16 will not come into engagement with each otherwhen the parts are assembled, but, by means of the screws 19, the shell 15 and plate 18 are drawn together and the adjacent portions of the shell 15 are thereby flexed slightly and a good frictional engagement between the pin and its clamping members is thereby obtained. 'In the present instance, the upper end of the cap 12 is of spherical form and enters a'circular opening in the shell 15 and the plate 18. Obviously, this same frictional effect might be obtained by modifying the structure herein disclosed in many ways which will be obvious to persons skilled in this art. The cap 12 is preferably secured to the inner metallic tube 10, by means of a screw 20 which also extends into a threaded opening in the bracket 21, which in turn is again secured to the under side of the adjacent portion of the'cap 12 by screws 22.- This bracket serves as a support for the switcl1- hook D whichis pivoted thereto at the point 23. The switch-hook extends. through a suitable opening 24 in the opposite wall of the standard, and a connecting rod 25 is secured to the switch-hook at a point adjacent to this opening and extends downward through the interior of the standard into operative relation with the call mechanism in the case A, as will be hereinafter more fully pointed out,

' The metal bracket 13 at the lower end of the standard B is secured to one side of the center of the base A, preferably by screws 26, to the top of the ,top plate 27 of the basal casing. By this arrangement, the lower end of the standard overhangs the center of the base and sufficient space is left between it and the top of the plate 27 for the passage of a plate 28 which forms part of the finger-hold mechanism by which the signal mechanism within the case is actuated The portion of the bracket 13, which is secured to the plate 27, also serves to limitably secured in place by bolts 39.

the movementof the finger-hold mechanism by enga ing at its opposite sides the opposite sides of the plate 28. The finger-hold mechanism includes, in addition to the plate 28, an arcuate plate 29 having a downward projecting flange adapted to rest upon a similar arcuate plate 30 whose flange extends into close proximity to the top of the plate 27. The plate 30 is provided at its top with a series of openings 31 and its flange is notched at 32 so as to allow the passage of a stop-pin 33 when the finger-hold fingerslcver .is held normally by a spring 37 1 so that its stop project-ion 36 lies in the outer portion of the opening 31. When in this position, as clearly indicated by the dotted line extending through the stop-pin 33, the stop portion will not engage t.hepin 33 when the finger-hold mechanism is operated, but itwill be apparent that whenever any particular linger-lever is pressed by the finger for the purpose of operating the finger-hold mechanism, its stop projection will be movedinto the inner portion of the opening 31- and nism is moved far enough. In addition to into a path which will cause it to engage the stop-pin 33, provided the finger-hold mechathe plates 29 and 30, the plate 29 is covered Y by an escutcheon plate 38 which is prefer- This escutcheon plate is adapted to hold in place'a card or other device on which designations, corresponding to the finger-hold lovers, are marked. In the operation of the mechanism, as is usual in such devices, the

lever opposite the particular designation wanted is pressed by the finger in order to rotate the finger-hold mechanism, and the extent of this movement in each instance is determined by the particular finger-lever depressed, since the displaced lever is the one which engages the stop-pin 33, I

The top plate 27 of the base A forms the mainsupporting plate for the mechanism contained within the base, andas clearly illustrated in the drawing, this mechanism is supported through the agency of four supporting posts 40, 41, 42, 43, which are firmly secured to the top plate in any preferred manner and extend downward into close proximity to the upper face of the bottom plate 44 of the casing. Suit-able screws, passingthrough the case from the bottom and threaded into the lower ends of these posts, serve to hold the parts together.

flange 46, both of which engage the peripheral wall 47 of the casing and firmly hold it in plape. lVith this construction, a substantia ly dust-proof casing is provided.

For the purpose of providing a suitable guide for the electrical conductors entering the base A, the wall 47 is cutaway slightly so as to enable a guide-ring 48 to be used. This guide-r-ing 48 and a second guide-ring 49 are struck up out of a strip of metal which is held in place between the plate .27 and the upper ends of the posts 40, -41, as clearly indicated in Figs. order to still further increase the stability of the structure from lowering its center of gravity, the bottom plate 44.- is struck up so as to provide a groove 50 at its extreme outer edge; and into this groove, is inserted a strip 51 of leather, felt, or like fibrous material which, when the stand is in use, engages the supporting surface upon which the stand may be resting and tends to prevent its slipping or its ready rotation in case of accidental movement, as by the engagement of the clothing with the hook-levers The mechanism, contained within the casing formed by the plates 27, 44 and 47,,

comprises, in general, gear mechanism which is located between the plate 27 and an auxiliary supporting plate 52, and contact mechanism which is mounted on the lower side of said auxiliary supporting plate. For the purpose of operatrvely connecting the finger-- hold mechanism located above the plate 27 and the gearing located below said plate, a hollow shaft 53 is provided. This shaft is Journaled in'the plates 27 and 52 and is provided with an opening throughout its length, through which the lower end of the rod 25, connected, as previously described, to switchhook D, extends into operative relation with a set of spring contacts s which is supported near the outer edge of the auxiliary supporting plate 52. This set includes spring- con tacts 54, 55, 56, 57, 58, which are'suit-ably insulated from each other and provided with proper connection terminals. As clearly illustrated in Fig. 7, contact 56 is longer than its fellows and it is this contact which 1S engagedby nections of the contacts. In order to prevent electrical contact belween the rod 25 and contact 56. the latter is providedwitha suit-able insulating button 59, which the end of the rod 25 is adapted toengage. The upper end of the shaft 53 is secured to the tinger-hold frame 28 in any suitable manner as by means of the collar 60 and the nut 61 cooperating therewith. The lower end of the shaft carries an actuating or impulse wheel I 62, provided with 5, l0 and 11. In

over. that which results.

.ing wheel 62 and located so the rod 25 to vary the con-- a series 'of teeth 63 arranged in the manner indicated in Fig. 5, which is rigidly secured thereto so as to partake of the movement of the shaft and the linger-hold mechanism. The shaft 53 is also provided with a driving-spring 64 which is secured at one end to the shaft, and at its opposite. end to a case 65 which in turn is secured to the auxiliary plate 52. With this arrangement, the movement of the finger-hold mechanism places the'spring under tension and it tends to return the shaft 53 and its associated parts to normal position,

which is that illustrated in Fig. 4, in which the right side of the bracket 13 and the left side of the plate 28 are in engagement.

In addition to the set of contacts 8 located on the under side of the auxiliary plate 52, said plate carries three other sets, designated respectively s s 8 Each of these is separately mounted upon the auxiliary plate 52,

preferably by means of screws, and each can be readily removed for purposes of inspection or repaiiz- The set 3 comprises spring contacts 66, 67, rigid contact 68, and a supporting plate 69. The supporting plate 69 terminates in a flanged end which serves as the means of securing the set of contacts to the plate 52 and it supports an insulating strip which separates it from the conta'ct 68 and also supports the insulation which separates the. contacts 66,, 67. Contact 66 is longer than its fellows and is normally engaged bya pin 70 carried upon the actuatas to maintain the contacts 66, 67, 68 out of engagement. Due to the inherent tension of contact 66, however, as soon as the wheel 62 is moved from normal, these contacts are broughtinto engagement. The sets of contacts 8 .9 are substantially identical and each comprises a rigid supporting strip 71, a fixed contact 2, a spring-contact 73, and a pivoted actuating member 74. The supporting strip 71 is provided with a flange by which the set is secured to the auxiliary plate 52 and it also has a laterally extending lug 75 between which and the bottom "flange is pivoted the actuating member 7-1. This member is provided with a tension spring which is coiled about its pivot 76 and normally tends to hold it against the stop-pin 77. A block of insulation 78 serves as a spacer between the member 74 and the spring-contact 7-5. The strip 71 and contacts 72, 73, sulated from each other and the contacts are provided with suitable connection terminals. The tension of the spring-contacts 73 is such as to normally maintain contacts 72, 73 in engagement.

The actuating member 74; is provided near its free end with lugs 79 between which is pivoted a triangular engaging. member 80. This engaging member is so constructed that upon the movement of the actuating wheel 62 in the direction of the arrow in Fig. 5, it will rock about its pivot without separating contacts 72, 73; but upon the reverse movement of thewheel these contacts will be disengaged and engaged upon the passage of each tooth. This action is clearly illustrated in Figs. 5, 8 and 9. As shown in Fig. 8, upon the forward movement, the portion of the member 80, which normally lies in engagement with member 74, is moved out of engagement and the their subsequent engagement may be increased by adjusting the position of the set upon the plate 52 so as to move the member 80 nearer the shaft 53, and may be de-- creased by adjusting the set so as to move said member farther from said shaft. In order that themember 80 will return to its normal position after movement to the positionillustrated in Fig.- 8, it; is provided with a small returning spring 80 which is preferably spirally wound about its pivot In order to decrease the friction between the parts, the portion of the member 80, which engages the teeth of the wheel 62, is provided with an anti-friction roller 82. Obviously, changes may be made in the details of this mechanism without departing from the spirit of-the invention.

In order to regulate the speed of the actuating wheel 62; the shaft 53' isoperatively connected to agovernor 83. Any preferred type of governor may be employed for this purpose and in the present instance I have illustrated a centrifugal governor of theball type. As clearly illustrated: in Fig. 12', the governor sha'ftis journaled between thetop plate 27 and a bridgei84swhich unites the supporting posts 42', &3 and which is. adapted to be adjusted through theagency of nuts 85, 86, threaded upon'sa-id posts; In;

the action of the governor, as the balls flyoutward, they tend to depressthe disk 87 downward in opposition to-theupward pull of the springs 8& The disk 8-? is adapted to engage friction blocks 89 of ebonite, rubber or other suitable material, carried by the bridge 84. As clearly illustrated in Fig. 13, the position of the:lower bearing-of the shaft of the governor may be nicely adjusted bymeans of the screw 99- threaded into the bridge 84 and retained in the desired position by the lock-nut 911.

The pinion 92" on the shaft of the govshaft 53 and its associated parts is retarded the finger-hold mechanism prior to the re-' 'its armature mechanism, the initial opera:

into engagement with the teeth of the gear wheel 95. Upon the movement of the arm 96 in the direction of'the arrow in Fig. 10, the pawl 97' slips out of engagement with the teeth and readily passes over them with: out actuating the gear-wheel 95; but upon the return movement, caused by the drivingspring 64, the motion of the arm 96 is communicated to the train of gearing and thereby to the governor. By the engagement of the disk 87 with the friction blocks 89 of the governor, the return m'ovemeht of the so as to .provide' a proper interval of time between the successive operations of the actuated spring-contacts. In order to prevent the manipulation of moval of the receiver from the switch-hook D, an electromagnet 98 is mounted between the main and auxiliary supporting plates 27 and 52 in a position to control, through tion of the shaft 53. This electromagnet has an angular armature 99 which is normally. held in a retracted position by a spring 100 and which coiiperates with an obstructing arm 101 to control the movement of the arm 96. The end ofthe arm 101 extends downward so. as to lie normally in the path of mowementof the pin 102 forming, inthe present instance, an extension of the pivotal pawl 9.7 but when the armature is at- -tracted, this arm 101 is thrown out of engaging, position and thearm 96 may be freely rotated; This electromagnet is conveniently disposed with reference to the other' parts of the mechanism and may be readily gotten at for purposes of, repair or substitution. As clearly illustrated in Fig. 10, the condenser 103 OfthQSHbSCI1be1' S set may be conveniently locatedonthe opposite side of the shaft 53 from the. electromagnet 98 in compact relation with the va;r1ous parts of the mechanism and clamped against the top. plate 27 by a screw-103 threaded through the auxiliaryplate- 52.

For convenience in making electrical connections to the various parts of the apparel- .tus, a bridge 104 of insulating material is arranged between the supporting posts 40', v 41, to the opposite side of the shaft 53- from;

the bridge 84 and provided with aseries. 012' 130 extending the from the standard B to the contacts on the registering opening-105 'the former being indicated in dotted lines madebet-ween the various contacts and these termmals and external connections may be made at any time with these terminals. In telephone transmitter leads bridge 105, theyare preferably led through a channel. 105 extending through the bracket 13 atxthe base of the standard and a in the top plate '27,

in Fig. 4, and the vlatter'bein g partially shown in Fig. 5.: r

In order to illustrate one application of the:.invention, I have provided Fig. 14 in which the various elements of the mechanism. heretofore described are diagrammatically illustrated. According to this diagram, the substation, which is designated M, is connected by line limbs P, S, with automatic switch-mechanism at the exchange, designated N Asfar as possible in this diagram, the same reference characters are used as heretofore, in order to connect the parts of the. difierentfigures with the diagram. In operation, a party at substation M, desiring to obtain connection with a line running to some other substation, first removes his receiVerlOG from. the switch-hook I), thereby interrupting the normal circuit between contactsfi i, 5?,v and closing a circuit between contacts 57. 58. In the mechanical construction, this is brought about through the agency of the rod 25 which extends down through the standard and the hollow shaft into "engagement with the sprlngcontact 56. ll'hile the receiver is on the hook, the contacts are vin the position illustrated in Fig. 7; but upon removing the receiver, contacts 56, 58 come into engagement. The closingof contacts 57, 58 completes a circuit from the live pole of the battery I3 at the central otlice. through rela 107, line'limbP, contacts 72. 73 of set .9 transmitter contacts 53, 57. winding of electromagnet 98, contacts 72, 73 of set 3 line. limb S, relay 108. through battery 13 to the grounded pole of battery 13. The closing of this circuit energizes clectromagnet 9 8 at the substation to attract its armature 99 andthereby unlock the impulse wheel 62 and the connected finger-hold mechanism to allow the same to. be manually" operated. The closing or. the circuit also energizes relays 107;:iiid 10S ofthe switchmechanism at the "cen; oilice. I, The energiZa-tion of these relaysiopenscontacts 109,.110-of the circuit for thei release magnet. RM, and the energizationi'of, the same. relays opens contacts 111,112 nd 'closes'contactsll fi, 11 1. VVit-h the contac L servedi ftha t a circuit for. primary magnet PM ie s'ffem h irap e calling party new of the contacts 72, 73 of "HUPHlSCS will momentarily decnergize relay in this position itwill be ob-- of the battery 65 .B throughlthe'winding of said-magnet to 'e'nergizatio'n of the secondary open contact 111, and hence through closed contact 114 to ground. A similar circuit extends from the live pole of the battery B through the winding of secondary magnet SM to open contact 112, thence through closed contact- 113 to ground. In this it willbe seen that the momentary denergization of relay 107' will momentarily energize primary magnet PM and a momentary denergization of relay 108 will momentarily energize the secondary magnet SM. The switch structure -is of the usual type employed in automatic systems in which the wipers are moved to a desired bank contact by partaking of movements in two directions, a primary direction and a secondary direction. In the diagram, the wipers 115, 116 represent two of the wipers of such a switch which are adapted to receive their primary movements by the repeated momentary energizations of primary magnet PM, and their secondary movements by the similar energizations of secondary magnet SM, and to be restored to normal at the end of conversation by the energization of release magnet RM. In this diagram, contact 117 is the contact of an off-normal switch which is adapted to be closed uponthe first primary movement of the switch parts. Such switches are well known in the art and it seems un-- necessary to refer to them more specifically.

Having now. removed the receiver and thereby unlocked the calling mechanism, the mechanism to transmit the impulses necessary to make the desired connection. Although there is but one switch shown, it will be understood that in the use of the invenactuat es his finger-hold tion in automatic or semi-automatic systems,

of switches connection. to transmit there will ordinarily be a series set in operation in making each Assuming that it is desired first Y six impulses over the line, the sixth fingerlever from the bottom, as seen in Fig. st, will be depressed and the frame 28 carried around until the stop projection 36 on the depressed leYcr engages the stop-pin This movement will be far enough to carry six teeth 63 of the actuating wheel 62 beyond the engaging member 80 of the set 8 of the spring-contacts; then upon the removal of the finger from the engaged lever, the actuatingwheel 62 will be returned by the spring 6%; and during its return movement, the contacts "4'2, 73 of the set 8 will be broken six times, followed by a single break set .9. The six 107 six times and thus momentarily energize primary magnet Phi-six times and thereby step the wipers 115, 11G six steps in a; primary direction. The single followin impulse will deen'ergize electromagnet 108 once with a consequent momentary single magnet SM.

It will be seen from the diagram andmechanical drawing-that the first movement of the impulse wheel 62 will ground the line limbs PS at the substation by way of contacts 66, 67, 68. Thus the energizing circuits for the relays 107, 108 will then exi tend from the live poles of the batteries B B over the line limbs P and S, respectively,

to this ground. I v

It will be understood that the switch con- 'struction, diagrammatically illustrated, is suchthat' the single impulse, following the six impulses, will start wipers 115, 116 in a secondary direction and they will continue this movement. until an idle trunk is found. Since-the extension of the calling partys circuit through other switches calls for the same operation of the calling mechanism, it will be unnecessary to go further into a detailed description of such operation. Aftereach operation of the actuating wheel 62, the ground is removed from the line limbs and the contacts of each set s s, are returned to normal.

At the end of conversation, the restoration of the receiver to its hook restores the con; tacts 54, 55, 56, 57, 58, to their normal position, thus interrupting the circuit through relays 107, 108 simultaneously, and thereby through their contacts 109, 110, completing a circuitfor the release magnet RM from the live pole of battery B through the winding of said magnet, oii-normal contact 117 and contacts 109,110, to ground, thereby restoring the switch parts to normal.

It is believed that this diagram, although fragmentary, will make the operation of the subject-matter of the invention perfectly clear without going further into the description of the'operation of the system in which said device is intended to be used.

From the above description, it will be seen that I have devised a signal transmitter which is capable of use in various relations other than as part of a desk-stand structure and which has many features capable of use in other relations. It will be apparent also that many alterations and modifications may be made in the structure here-in disclosed without departing from the spirit and scope of my invention. For example, the arcuateframes 29 and 30 of the finger-hold mechanism may be combined in a single plate 29, as shown in Figs. and 16, which serves as the sole support for the modified finger-levers 35', whose inner ends are not turned downward as in the case of levers 85,

but lie in the same plane as the outward extending ends. These levers are adapted to cotiperate. with the stop-pin 33, as in the case of the levers 35, but are retained in' their normal positions by the coiled spring. 37. Likewise, other changes may be made. I thjrefore do not wish to be limited to the member, a finger-hold for actuating said lever.

specific disclosure of the structure and its use, but aim to cover by the terms of the appended claims all reasonable modifications and adaptations.

What I claim as new and desire to secure by Letters Patent of the United States. is

1. A call device comprising a movable member, a finger-hold for actuating said member, and means operated b the engagement of the finger with the nge'r-ho d to determine the extent of movement of said member.

2. A call device com risin a movable member, a plurality of ngerolds for actuating said member, and means operated. by the engagement of the finger with each finger-hold to permit the movementof said member a distance corresponding to the particular finger-hold engaged.

3. A call device comprising a movable member, a part movable from normal b the pressure of the finger upon the fingerold and a stop. lying in the path of movement of said part when in its abnormal position. 4

4. A call device com risin a movable member, a plurality of erolds for actuating said member, a part associated with each finger-hold, movable from normal by the pressure of the finger upon the finger hold, and a stop lying in the path of movement of said parts when in their abnormal positions.

5. A call device comprising .a movable member, a finger-hold for actuating said member including a --lever movable from normal under the pressure of the finger independently of said member, and a stop 1ying in the path of movement of the pressed 6. A call device comprisin a movable member, a plurality of fingerolds for actuating said member, each including a lever movable from normal under the pressure of the finger independently of said member,

and a stop lying in the path of movement of no the pressed levers.

7. A call device comprising a supporting plate, a contact-actuating member rotatably mounted on one side of said plate, a fingerhold member rotatably mounted on the op: =1-1 posite side of said plate and operatively connected to said contactactuating member, finger-holds formed by levers pivoted to and projecting outward from said fingerhold member and having a limited m0ve----I20 ment from normal under the pressure of the finger, and a stop mounted on said plate in the path of movement'of the pressed levers.

8. In a call device, a finger-hold device comprising'a punching having a top and a downward projecting flange. and finger-levers pivoted at the under side of said top adjacent to said flan e and projecting outward through suita le openings in said flange.

' pivoted at l and their and a downward pro ecting and gear mechanism 9. In a call device, a finger-hold device comprising a punching having a top and .a downward projecting flange, finger-levers the under side of said top adjacent to said flange and projecting outward through suitable openings in said flange, andsprings for holding said levers normally in the same relative position.

10. In a call device, the combination of a supporting plate, a stop-pin secured thereto and a finger-hold device pivotally mounted on oneside of said plate, said finger-hold device comprising a punchi having a top ange provided with a series of openings, a series of fingerlevers pivoted to the under side of said top adjacent to said flange and having their outer ends projecting through said openings inner ends normally lying adjacent to the path of movement traversed by said stop and severally movable into said path upon the application of pressure to said outer ends, and springs tending to hold saidlevers in their normal positions.

'11. In acall device, the combination of a supporting plate, a stop pin projecting from one side thereof and a finger-hold device pivotally mounted on the same side of said plate as said stop-pin, said finger-hold device comprising a punching having a top and a flange projecting downward on all sides of said punching into close proximity to said'plate, and finger-levers pivoted to said punching on thannder side ofsaid top within the space formed by said fiangean having their outer ends projecting suitable openings in said flange.

12. A call device comprising a frame including a main supporting plate, finger-hold me'chanism pivoted to one side of said plate, spring and gear mechanism located adjacent to the opposite side of said plate, and spring contacts and actuating means therefor accessibly supported on said frame more remotely from said plate than said spring and gear mechanism.

13. A. call device comprising two substantially parallel supporting plates, lingerdiold mechanism pivoted to the outer face of one of said plates, a main central shaft spring located between said plates and opcrativcly connected by said shaft to said linger-hold mechanism, and spring contacts and actuating means therefor located on the outer face of the other of said plates, said actuating means being opcratively connected by said shaft to said spring and gear mechanism.

1-4. A call device comprising a main supporting plate, finger-hold mechanism pivotcd to the: ouler t'ace of said plate, supporting posts extending outward: from the ;oppos'te side of said main plate, an auxiliary supporting plate carried by said posts and spaced from said main plate, spring and through gear mechanism located between said plates and operatively connected to said fingerhold mechanism, spring contactsand actuating neans therefor located on the outer face of sald auxiliary plate and operatively connected to said spring-and gear mechanism, a bridge uniting said posts and contact tcrminals mounted upon said bridge. 15. A call device comprising a main supporting plate, finger-hold mechanism pivoted to the outer face of said plate, supporting posts extending outward from the opposite side of said main plate, an auxiliary supporting plate carried by saidv posts and spaced from said main plate, spring and gear mechanism located between said plates and operatively connected to said fingerhold mechanism, spring contacts and actuating means therefor located on the outer face of said auxiliary plate and operative connected to said spring and gear mechanism, a bridge uniting said posts, and a governor lccatedbetween said bridge and main plate and operatively connected tosaid spring and gear mechanism.

16. A call device comprising a main sup porting plate, finger-hold mechanism pivoted to the outer face of said plate. supporting posts extending outward fromlhe opposite side of said main plate, an auxiliary supporting plate carried by said posts and spaced from said main plate. spring and gear mechanism located between said plates and operatively connected to said fingerhold mechanism, spring contacts and actuating mechanism therefor located on the or face of said auxiliary plate and operative-1y connected to said spring and gear mechanism, a bridge uniting two of said posts, contact terminals mounted on said bridge. a second bridge also uniting two of said posts, and a governor located between said second bridge and-said main plate and operativcly connected to said spring and anism.

1?. In a call device, the combination of a toothed actuating member, a yielding contact member laterally movable relative to said toothcd member, and pivoted engaging means between said members whereby the movement of said actuating member in one direction actuatcs said contact member, tooth by tooth. and by its movemcnt'in the opposite direction coiiperates with said pivoted member whereby it fails to actuate said contact member.

18. In a call device, the combination of a toothed actuating wheel, a yielding contact member laterally movable relative to said trothed member, and pivoted engaging means between said members whereby the movement of said actuating wheel in one directicn actuates said contact member, tooth by tooth, and by its movement in the opposite direction cooperates with said pivoted gear mocl1-- contacts normally held out of engagement tween said shaft and plate, means for windmember whereby tact member.

19. In a call device, the combination of a toothed actuating member, a yielding-contact member laterally' movable relative to said toothed member, a pivoted engaging member so shaped and-pivotally mounted upon said contact member as to transmit the movement of said actuating member to said contact member upon the movement ofsaid actuating member in one direction only.

20. In a call device, the combination of a toothed actuating member, a yielding contact member, a triangular engaging member pivoted at one corner to said contact member, normally engaging said contact member at another corner and having its third corner lying in the path of movement of the teeth of said actuating member.

21. In a call device, the combination of a toothed actuating member, a yielding contact member, a triangular engaging member pivoted at one corner'to said contact member and'having a second corner adapted to engage said contact member and its third corner adapted to be engaged by the teeth of the actuating member, a spring for yieldingly holding said engaging member so as to cause said second corner to engage said contact member, and an anti-friction 'roller located at the third comer of said engaging member.

22. A call device comprising a supporting plate, a shaft journaled in said plate, a spiral driving spring acting between said shaft and plate, means for winding up said spring, means for governing its unwinding, an actuating Wheel mounted on said shaft, a pin projecting from its surface, spring it fails to actuate said con- 1 by said pin and brought into engagement upon the rotation of said wheel from normal, and contacts secured .to said plate at opposite sides of said wheel and operatively related thg to.

23. A ca 1 device comprising a supporting plate, ,a hollow shaft journaled in said plate, a,spiral drivingj=spring acting being up said spring, means for governing its unwinding, an actuating wheel mounted on said shaft, contacts secured to said plate at opposite sides of said wheel and operatively related thereto, additional spring contacts, and actuating means extending through said hollow shaft into operative relation to said additional spring contacts.

24. A call device comprising a supporting plate. a hollow shaft j'ournaled in said plate. a spiral driving spring acting between said shaft and plate, means for winding up saidspring, means for governing its unwinding, an actuating wheel mounted on said shaft on the'opposite side of said plate from said driving spring, a pin projecting from the an operating member having a series of.

movable finger-hold members, a stationary stop with which said finger-hold members will engage when in operating position and thereby limit the movement of the operating member. e

26. In a device of the character described, an operating member having a series of resilient finger-hold .members adapted to bepressed out of their normal 'position by the finger of the operator, and a stationary stop located out of the normal path of the resilient members, said resilient members being adapted to engage said stop when pressed.-

out of their normal position and thereby Emit the movement of the operating mem- 27. In a device of the character described, a revoluble operating member having a series of spring fingers adapted to be engaged by the finger of the operator when used, a

stop member adapted to be engagedby the spring fingers when pressed from their nor-- mal position, thereby limiting a revoluble movement-,ofthe opera-ting member.

28. A'callingdevice comprising two substantially parallel supporting plates, finger holdmechanism located at the outer surface of one of saidplates, spring and gear mechanism located between said plates, spring contacts and a toothed actuating Wheelv therefor located on the'outer face of the other of said plates, and a main central shaft extending through said plates and rigidly secured to. said finger holdmechanism, spring, and actuating wheel.

29. A calling device including a revoluble dial having a series of finger holds, a stop, and means associated with each of said finger holds for engaging said stop to limit the movement of said dial according to the'engaged finger hold.

30. In a deviceas described, a main frame, a shaft, a notched segment on said shaft, an electric switch, adapted to be intermittently operated by each successive notch passing a given point, a head on said shaft by which said shaft may be manually oscillated, press-. able stop keys in said head, and a stop-cooperating with said pressable keys to limit the movement of said notched segment, substantially as specified.

31. In a device as described, a main frame,

c an omillating said keys shaft, a notched segment thereon, an e ectric switch, means for operating said switch by each of the respective notches of said segment, pressable stop keys and a stop limiting the movement of said segment whereby a predetermined number of notches will be broughtinto operative position, substantially as specified.

32. In a device as 'described, a main frame, an oscillating shaft, a notched segment carried b said shaft, an electric switchadaptsuccessively operated by the respective notches of said segment, being adapted to move in one direction independent of said switch, a motor returnin said segment in operative engagement wit switch and a seriesof pressable stop limiting the notched segment to" a predetermined number of operating engagements with said switch,- substantially as specified.

33. In adevice as described, a main frame,

I i an oscillating shaft, a notched segment on m it this "tut my be obtained for five cents each, by addressing" the Washington, D. G.

sa shaft, an electric switch, a head on said aha whereby said shaft may be oscillated in one direction, pressable stop keys in said I head and a stop with which said keys engage said segment to limit the oscillation of said shaft and segment, a motor adapted to return said segment, an electric switch, interengaging means between said segmentand switch whereby said segment. Wlll move independmoved in the contrary direction, substantially 'fas specified, I

3-1. In-a device as described, a main frame, an oscillating notched vse ent therein, an electric switch, a lever a apted to operate said switch, a reversible pawl pivoted to said lever and engaging said notched segment,

ent of said swlt'ch in one direction, but will I intermittently operate said switch when and riding freely over said notches 'as the segment moves in one direction and means to limit the pivotal movement of said pawl in its reverse position. whereby said pawl in riding over the notches of said'segment will cause a corresponding lever, substantially as s ified;

In witness whereof, my name this 16th da of.March, 1910.

WIL IAM.KAISLING. Witnesses:

CAROLYN WEBER, CARRIE E. ANDERSON.

moveinent of the hereunto subscribe v

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