US2329466A - Call transmitter - Google Patents

Description

Sept. 14, 1943. H. w. GOFF 2,329,466

CALL TRANSMITTER Filed Dec. 17, 1940 6 Sheets-Sheet l FIG. 2

/Nl ENTOR H. W GOFF 4ZZI Y CALL TRANSMITTER Filed Dec. 17, 1940 FIG} 6 Sheets-Sheet 2 Sept. 14, 1943. H. w. GOFF CALL TRANSMITTER Filed Dec. 17, 1940 6 Sheets-Sheet 5 lNl/E/V TOR FIG. 6

h! w GOFF 31% 3 mm? ATTORNEY Sept. 14, 1943. H. w. GOFF 2,329,46

CALL TRANSMITTER FIG.

FIG. /3 I o 5/, a 5 2 9 5 2 L 0 000000 I 000 DOOOQ 0Q A 000000000 00000 00 x W N N L N /v 52 x /Nl EN7'OR I y h. w GOFF A T TORNE K Sept. 14, 1943. H. w. GOFF 2,329,466

CAL-L TRANSMITTER Filed Dec. 1'7, 1940 6 Sheets-Sheet 6 F/G. /5A FIG. I58

FIG. /7

INVENTOR H W GOF F A T TORNE Y M sat. 1 2,329,466

I STATES- :PATENT OFFICE CALL TRANSMITTER Harold W. Golf; Manhasset, N. Y., assignor to Bell Telephone Laboratories, Incorporated, New York, N. Y., a corporation of New York Application: December 17, 1940, Serial No. 310,452 8' Claims; (01.179 90) This invention relates to'tel ephone call transmitter devices.

The'object of the invention is to combine a call transmitter of the; repertory: dial type with acall Fig. 14 is a detail view showing the digit defining elements resetting mechanism in position for resetting such elements followingvthe transmission of the call;

Fig. 15A is a side view thereof showing a numtransmitter of the key-controlled type in a single 5 her of digit defining elements in the operated unit usinga common pulsing mechanism. position and the resettin mechanism positioned In the drawings: v for the repeating of a call;

Fig. 1'. is a planv view-showing the pointer in Fig. 158 is a view showing the digit defining position for the transmitting of a call setby the elements in reset position as efl'ected by the manoperation-otthekeys; 'ual operation of a handle placed at the front. of

Flg.2is'a'1ront view; the casing housing the transmitter operating Fig-L 3 is atop assembly view of the call transs' mechanism; mitter operating mechanism shown with the cas- Fig. 16 is a modification of the pulsing mechingv in section; anism; and

Fig; ii'sa partial front view showing-the'cards Fig. 17 is a view of one Of the code elements on which the namestotthesubscribersare printed used in connection with the repertory mechanism for indicating, in cooperation with the pointer, shown in adjusted position on its supporting the operation of one 01. the code elements comshaft. 7 prised in the repertory mechanism, the pointer. In the call transmitter of the invention, a plubeing. shown in position associating the pulsing 20 ity o key members K1, K2, K3, K4,.K5, K6, K1. mechanism with the key-controllodidlgit setting Ks, K9 and K10 are pivoted on a common shaft i l mechanism; r shown in Figs. 3, 5, 6 and 7 Journaled in theup- Fig.5 is'ai right si'dervi'ewgshownwith portions right extending arms a and d1 of a U-shaped of the casing cut away on line 5-5iofFig. 3; support l2 secured to a base I3 by a plurality of Fi .6"isa-verti'ca1cross-sectibnai view takenon screws II. The keys etc., are provided line 66 of Fig. 5; with downwardly extending arms I6, best seen in Fig. 7 is aright'side view showing a number of Figs. 5, 7 and 10, engaging a comb element l5 operating parts in section taken on line 7-1 of serving for holding the keys K1, K2, etc., in spaced Fig. 3; relation to each other and at predetermined en- Fig. 8 is a partial view of the key-controlled gaging points along a bar I9 provided for a purcall setting mechanism v shown in: normalv nonpose which will be hereinafter described in detail,

' operated position, a number of operating parts retractile springs I! being provided for normally being shownipartly -in.sectiom, holding the keys K1, K2, etc., in normal non- Fig. 9 is a partial view of th key-controlled operated position as defined by stops afforded by call. setting mechanism shown with, atnumber of lug members I8 formed with the arms 16 of the parts in their operated positions; keys abutting against the comb element l5.

' Fig..10;-is, a: partial: left" side. view: showing the The keys K-l, K2, etc., areprovided with arms Y, pulsing mechanismin the-operat'edposition with Y2, Y3, Y4, Y5, Y6, Y1, Ya, Y9 and YlO Of different the baseLand the;v casing shown! in section; lengths disposed in engageable relation with the Fig; 11 is. apartial view; showing; the pulsing 49 bar 19 having arms such as bi and 019 secured to and shunting springs, inoperative relation with a shaft 20, the bar I!) being disposed at an angle the cams actuated by the test pawl operating relative to the length of shaft 20 to form in c0- mechanism, a member of operating parts. being operation with the arms Y, Y2 and Ya, etc., of the shown insectionzt'alenon line il -H ofFig. 1Q; key members Kl, K Ks, etc., a difierential mech- Fig. 12 isapartial view showing the star-wheel anism for imparting angular movements to shaft and the mechanism operati g the: test pole, a 20' which ar proportional to the numerical values num o perating parts e g S wn in section of the keys to perform a function which will be takenon 1ih 0f is= hereinafter described in detail.

Fi 1 s a developed v of the wheel The shaft 20 is journaled on the arms a and a1 porting die t definins'elementi n m r of 50 of U-shaped support. l2 and on the upright eX- roups of dig de n elements being Shown tending support 2| secured to the base l3 by a operated so as to-form the'int'erdigitsspacesbenumber of screws 22 and to one end of shaft 20 tween the digit defining elements forming the is securely mounted a lever member 23 best seen telephone call designation to be transmitted; in Figs. 3, 5, 6, 8 and 9 to the free end of which is pivoted one end of a connecting rod 24, while the ment of connecting rod other end of this rod connects with the arm portion of a yoke-like shaped member 26 pivotally mounted at the free end of laterally extending arms b and bi formed with a lever 28, best seen in Figs. 3, 5, 7, 8 and 9, in turn mounted for pivotal reciprocating movement on a bearing or hub 29 laterally extending from an upright supporting member or flange 30 secured to the base |3, while the yoke member 26 serves for pivotally mounting a spring pressed pawl 21 in engageable relation with a plunger 35 mounted in the hub 29. The pivotal movement of the yoke 26, and thereby the movement of pawl 21 as for actuating the lunger 35, is limited upon the downward move- 24 as effected by the operation of the key members K1, K2, K3, etc., by an arm 31 formed with the yoke 26, abutting against the arm b of lever 28 and upon the upward movement of connecting rod 24 as effected by the tension of a retractile spring 33 by an extension ea: of pawl 21 abutting against a projection 36 of arm b1 best seen in Figs.- 7, 8 and 9 on which the yoke 26 is pivoted, the spring 33 having one of its ends hooked to the arm 23 and its other end to a stud st laterally extending from supporting flange 30.

Lever 28 is held in normal position against the tension of retractile spring 33 by a lug 32, best seen in Figs. 3, 5, 6 and 7, while a springpressed pawl 3| mounted at the free end of lever 28 is normally held disengaged from the teeth of ratchet wheel 38 due to theengagement of a lug Li carried by this pawl with the stop lug 32 and the tension of spring 33 holding this lever against the stop 32.

According to the mechanism abovedescribed, the operation of any one of the key members, as K for example, from its normal position shown in Fig. 5 to its operated position shown in Fig. '7 is effective to impart an angular movement to the shaft and lever 23 carried thereby through the engagement of its arm YlO with the bar l9, while the movement of lever 23 is in turn effective to impart a pivotal movement to the yoke 26, the extent of which is determined as above described by the arm 31 of this yoke engaging the arm of lever 28 on which this yoke is pivotally mounted.

The pivotal movement of yoke 28 from the position shown in Fig. 8 to the position shown in Fig. 9 is effective to move the pawl 21 for imparting a longitudinal movement to the plunger 35 to a point wherein the pawl 21 is caused to slip over this plunger for releasing it and thereby" permitting its return movement in a manner and for a purpose which will be hereinafter described in detail, while the continued movement of lever 23 following the operation of plunger 35 is effective to impart a pivotal movement to lever 28, on hub 29, which movement causes the pawl 3| carried thereby to fall on the ratchet wheel 38 and inefiectively move over a number of teeth thereof corresponding to the numerical values of the-operated keys, 1. ten teeth plus a nume her of teeth corresponding to an interdigit space as INT in the code disc CD shown in Fig. 17 or the interdigit spaces N between groups of digit dcfiningelements as indicated diagrammatically in Fig. 13,, thus rotating this ratchet wheel in a direction indicated by the arrow shown in Figs. 5 and 7 upon the return movement of lever 28 to normal under the tension of retractile spring 33 when the pawl 3| is againdisengaged from the ratchet wheel 38 and the lever 28 arrested by its engagement with the stop lug 32 while the pawl 21 is caused to reengage the plunger 35 as shown in Fig. 8 by thetension of its own retractile spring.

A shaft 39 is supported by upright supports 40 and Al and bya supporting flange 4|c best seen in Figs. 3 and '1 and on the right disposed end of this shaft in position concentric to plunger 35 is mounted for free'rctation thereon a plate PL having an arcuated lug portion'OP normally engaging" the free end of a lever LX securely mounted on a shaft 92 to perform a'function which will be hereinafter described in detail and on shaft 39 adjacent the plate PL are mounted the ratchet wheels 38 and 38 secured to 'each other for rotation as a unit, the wheel 38 being as above described engaged by the pawl 3| carried by the lever 28.

The plate PL is formed with two laterally extending lug portions 43 and 44 for pivotally mounting an arm 45 in operative relation with the plunger 35 while an arm 46, best seenin Figs. 5, '1, 8 and 9 formed with this plate, is provided for pivotally mounting the spring-pressed pawls 48 and 49, the pawl 48 engaging-the ratchet wheel 38a while pawl 49 engages a ratchet wheel 50, the latter being secured to a wheel 5| keyed to the shaft 39 to which a plurality of code discs as CD shown in Fig. 13 are mounted there being one hundred and twenty teeth formed with each ratchet wheel 38, 38a and 50, respectively,

On wheel 5|, at the periphery thereof, is mounted a plurality of longitudinally movable digit defining elcments'in the form of pins 52 which may be moved from normal position shown in-Fig. 8 to operated position shown at A in Figs. 9 and 15a for controlling the operation of the pulsing mechanism which is of the type described in Patent 2,036,037, issued to H. W. Goff, March 31, 1936. The longitudinal movement of the pins 52 as for setting a call by the operation of key member K1, K2, K1, etc., is effected by a plunger member 53 of rectangular cross-section slidably mounted in a guide formed at.

the free end of plate'PL and shown in Figs. 3, 5, 6, 7, 8,and 9; while a retractilespring 54 is provided for returning this plunger to normal position following each operation of arm 45 as effected by plunger 35, the width of plunger 53 being equal to the width of the interdigit portion INT of code disc CD in turn equal to live pins 52 in wheel 5| for moving such groups of pins collectively in response to each key depressed in the setting of a call designation to form the so-called interdigit spaces between each of the groups of pins 52 whichiremain unoperated and which like the notches N in the code disc CD Iorm'the digits of thetelephone call. designation to be transmitted.

The plate PL is held in normal position against the stop lug 32 by a retractile spring 42 and is moved step by step for positioning the plunger 53 in operative relation with the pins 52 depending upon the operation of the key members K1, K2, K3, etc., through the rotation of ratchet wheel 38 by pawl 3| and the consequent rotation of ratchet wheel 38a .engaging'the pawl 48 carried by the arm 46 of plate PL while a pawl 49, also pivotedon arm 46 of plate PL, engages the ratchet wheel 5|l secured to the wheel 5| for holding the plate PL in its advanced position against the tension of its retractile spring 42.

The upright member 40 is provided'with a plurality of laterally extending studs 56, best seen in Figs. 8, 9; 14, 15A and 15B, on which is slidably mounted a disc 51, having a hub portion CP which will be hereinafter described in detail, coil,

springs 62 on stud 56 being provided for normally holding the disc 51 in spaced relation with thepin 52 and thereby the forked lever 60 in position wherein the roller 63 carried thereby rests against a disc 64 keyed to the shaft 39 and having a cam portion 65 provided for normally engaging the roller 63 for imparting the pivotal movement to forked lever 60 and thereby a sliding movement to the disc 51 on stud 56 for returning the operated pins 52 in normal position shown in Fig. 8, following each turn of the shaft 39 and wheel I, that is, following each call transmitting operation.

The turning of handle YX from the position shown in Fig, 2 to the position marked REPEAT, V

the movement of shaft ST and the crank pin 6| is effective to impart adownward movement to the forked lever 69 for moving it from the position shown in Fig. 14 to the position shown in Fig. 15A for positioning the roller 63 out of the path of cam 65 so that the disc 51 is not operated and the pins 52 are not returned to normal following the complete turn of 'shaft,,39 and that of wheel 5I, thus permitting repeating a call set by the operation of the key members by the simple operation of a handle 66 as for tensioning a motor spring ina manner which will be hereinafter described in detail, while the movement of shaft ST by the operation of handle YX from the position marked REPEAT to the position marked RESET is efiective to move a lever SL secured to the shaft ST from the position shown in Fig. A to the position shown in Fig. 15B for imparting a pivotal movement to the forked lever 60 which in turn imparts a sliding movement to the disc 51 on stud 56 and against the tension of retractile springs 62 for returning the operated pins 52 to normal position.

A cross-bar CA shown in Figs. 3, 8, 9, 15A and 15B is formed integrally with the discs 64 both secured to the shaft 39 and serve for keying the code discs CD to this shaft while affording means for readily aligning these code discs in a common starting position relative to a test pawl 98, best seen in Figs. 3, 7 and 10, the function of which will be hereinafter described in detail.

The shaft 39, the code discs CDand the wheel 5| keyed on this shaft are rotated by a motor spring mechanism comprising the handle lever 66 shown in Figs. 1, 2, 3, 5 and 6 having a clutch element 61, best seen in Fig. 3, engaged with its complement clutch element 68 formed with a gear sector 69. The movement. of handle 66 and that of gear sector 69 from its normal position against the stop S1 to its operated position against the stop S2, best seen in Figs. 3 and 5', is effective to tension the motor spring 10, the latter having one of its ends hooked on. the gear sector 69 and its other end secured to tne gear sector supporting spindle 1I, the latter extending laterally from.

the supporting flange The gear sector/69 meshes with a pinion 12, shown in Figs. 3 and 5, mounted for free rotary movement with a ratchet wheel 12a as a unit on a shaft14 journaled in flange 39 and on an upright support 15 secured to the base I3 by a number of screws SC. A gear 15 also mounted for free rotation on shaft 14 is provided with two spring-pressed pawls 11 and 18 shown in Figs. 3 and 5 engaging the ratchet wheel 12a so that the returnmovement of handle 66 and that of gear sector 69 under the tension 5 of motor spring-10 is effective to rotate the gear 15 through the engagement of pawls 11 and 18 with the ratchet wheel 12a. The rotary movement of gear 15 is transmitted to the shaft 14 through a pinion 19 mounted for rotation with a gear 80 as a unit on a spindle 8I laterally extending from the supporting flange 30 while the gear I8 meshes with a pinion 82 keyed on the shaft 14. The angular movement of gear sector 69 as defined by stops S1 and S2 being such, relative to the speed ratio of pinion 12, gears 15 and 80, and pinions 19 and 82, as to impart to shaft 14 under the tension of motor spring 19 thirty turns for each operation of the handle 66.

On shaft 14 is securely mounted a gear I60 engaging a pinion I6I carried by the spindle I62 of a centrifugal speed governor I63 shown in Fig. 3 provided for controlling the operation of the pulsing mechanism when operating under the tension of motor spring 10. Shaft 14 is operatively connected to a second shaft 84 as'shown in Figs. 3, 6, '7 and 10 by the meter gears 85 and 86 and on shaft 84 is keyed a worm 81 disposed in engagement with a worm wheel 88 keyed to the shaft 39 on which the code discs CD are mounted. The speed ratio between the worm 81 and worm wheel 88 being of the order of 30 to 1 so chosen for a purpose which will be hereinafter described in detail.

On shaft 84 is mounted a wheel 89, best seen in Fig. 12, of the type disclosed in Patent 2,036,031 above mentioned having four cam portions P1, P2, P3, P4 engaged by a spring-pressed lever member 90, seen in Figs. 3, 6, 'Zand 10, and on this lever rests one arm m of an angular-shaped lever 9IA, the other arm of which serves in cooperation with a similar arm 9Ia shown in Figs. 3, 6, 7

' and 10 for mounting'a bar 93 of inverted U- shaped cross-section in parallel relation to shaft 39. Levers 9| and 9Ia are keyed to a shaft 92 journaled in upright supporting-flanges 30 and M0, while a retractile spring G, coiled around shaft 92, holds the arm m of angular lever 9I in operative relation with the arm I9 resting on the cam wheel 89.

reciprocated once for each cam P1, P2, P3 and P4, of wheel 89 or 4 30 120 reciprocating movements for each turn of code disc CD and once for each pin 52 mounted on wheel 5I keyed on on shaft 39. The reciprocating movement of bar 93 is imparted to a downwardly extending lever member 94, best seen in Fig. 10, held in, operative relation with the bar 93 by a spring 95 and to the free end of lever 94 is mounted the test g pawl 96. On a spindle 91 is pivotally mounted another downwardly extending arm 98 shown in Figs. 6, '1, f0, 11 and 12, having a projection 99 'formed therewith abutting against the upward extending arm of angular lever 9| under the tension of a spring I00, best seen inFig. 10, for imparting reciprocating movement to an arm 98 in phase with the operation of test pawl 96 as effected by the rotation of cam wheel 89 for moving combined segmental members IOI, I02, I03 and I04 of insulating material in position for actuating pulsing and shunting contacts P and S, respectively, under control of the pins 52, which may be set by the operation of the .key members K1,v K2, K3, etc., or'that of code disc CD in the manner described in the above-mentioned According to this mechanism the bar 93 is 4- asaaeee patent; a stationary cam cm, best seen in Figs. 7, 10 and 11, being provided for returning each segment IOI, I02, I03 and I04 to normal position following the operation of spring P and S.

The arm 94 carrying the test pawl 96 is mounted for free pivotal reciprocating movement on a nut I06, Figs. 3, 5, 6 and 10, engaging a. lead screw I01. This lead screw is journaled on the top portion of upright members 30 and 4 lo while the nut I is formed with two lug portions I08 straddling a bar I08 securely mounted on the upright supporting members 30 and Me so as to prevent the rotation of the nut I during the rotation of lead screws I01 and thereby causing the movement of arm 94 and the test pawl 35 carried thereby in selective operative relation with the code discs CD on shaft 38 or the digit defining elements 52 on wheel 5|.

A second lead screw III shown in Figs. 3, 5, 6, 7 and i0 journaled in supporting flanges 30 and He is operatively connected to lead screw IN by gears H2, H3, respectively, and on lead screw III is mounted a nut H4 having a yoke shaped member H5 secured thereto and extending between rails H6, best seen in Figs. 4, 5 and 7, forming receptacles forcards I20 and I2l on which subscribers names having the telephone designations represented by the code discs CD are inserted and on the card I20 in addition to subscribers names are printed, as shown in Figs. 1 and 2, the words Key operated in registry with which the pointer or index I I1 carried by the yoke H5 is moved for associating the test pawl 96 with the digit defining elements 52 on wheel 5|, the rotation of lead screws I01 and I II being effected by a manually operable knob I I0 secured .to one end of lead screw I01.

A glass window I22 is clamped to the underside of the front end of casing I23, as shown by clips CLl shown in Figs. 5, '7 and in superposed relation to the cards I20 and I2I which are removable from their receptacles I through openings I30 and I3I, shown in Fig. 4, while the casing I23 is secured to the base I3 by a plurality of screws SCS, shown in Figs. 3, 5, 6 and '7, such casing having projections I30 forming a cradle serving for receiving the telephone handset HS, shown in Figs. 1 and 2.

In the modification of the pulsing mechanism, as shown in Fig. 16, the shaft 84 carries two quadruple cams 88 and 80b disposed angularly from each other on this shaft an angular distance of 45 degrees, while a lever I5I hich is pivoted on lugs extending from the base I3 is disposed for operation by the rotation of cam 83b and another lever I50 secured to a shaft 52 is disposed for operation by the rotation of cam 89. On shaft 82, which is journaled on lugs extending from the base I3, is secured a lever 94 to which the test pawl 96 is mounted for cooperation with any one of the code discs CD or with the digit defining elements 52 as the case may be. A spring I52 normally holds the lever I50 in operating relation with the cam wheel 89 and thereby the test pawl 98 in coacting relation with the code disc CD, which may be selected while lever 94 is provided at its free end with a stud I53 of insulating material disposed in engageable relation with a contact spring I54. Similarly, the lever I5l is provided at its free end with a stud I55 of insulating material disposed in engageable relation with a contact spring I56, theinsulating studs I53 and I55 being such as to permit the closure of the contact springs I54 and I58 when the lever I50 rides over one of the points of cam 80 while the lever IN is engaged between two oi the cam points or cam 08b.

According to the pulsing mechanism of the invention due to the contact springs 04 and I55 5 being caused to alternately move away and toward each other simultaneously with the consequent quick closure and opening of the springs, as effected by the operation of cam 85 and 891) under control of the test pawl 96 and code discs 10 CD, or under control of this test pawl and the digit defining elements 52 on wheel H, a high degree of accuracy in the transmitting of pulses is obtained.

In a typical call, setting and transmitting operation of a telephone call designation by the operatlon of the key members K1, K2, K1, etc., sup posing that it is desired to establish a talking connection with the subscriber having the call designation 0352952 for example, the manual operation of knob H0 is effective to move the index H1 in registry with the mark Key operated printed on the card I20 while positioning the test pawl 86 in cooperating relation with the digit elements 52 which may be moved from normal position, shown: in Fig. 0, to the'position shown at A in Figs. 3 and 9, by the operation of the keymembers K1,K2, Ks, etc; I'he operation or key K10, the first digit oi the telephone call designation 0352952 above mentioned, is eflective to impart a rocking movement to the bar I3 for pivoting the shaft 20 and thereby imparting a movement to the arm 23 against the resistance of retractiie spring 33. The downward movement or arm 23 and that or connecting rod 24 is eflectlve to impart a pivotal movement to yoke 26 for moving the plunger 35 through its engagement with the pawl 21 from the position shown in Fig. 8 to the position shown in Fig. 9 wherein the pawl 21 is caused to slip over this plunger for permitting its return movement to normal during the continued operation of the key and that of lever 28 which is operated upon the engagement of arm 31 of the yoke with the arm I) of lever 28, the angular movement of this lever from its normal position against the stop lug 22-,

Fig. 7, being equalto fifteen teeth of ratchet wheel 38 with which the pawl 3| carried by this lever engages.

The pivotal movement of the yoke 28 and the consequent longitudinal movement of plunger 35 is efiective to impart a pivotal movement to arm 45 for moving the plunger 53 mounted at the free end or plate PL for moving a group at pins 52 from the position shown in Fig. 8 to the posi- 5 tion shown in Fig. 9, that is, in engageable relation with the test pawl 55, the width of plunger 53 being as above described equal to five pins 52 on wheel 5I.

The return movement of key Km as effected by the tension of retractiie spring 33 acting on lever 23 is effective to return the yoke 26 from the position shown in Fig. 9 to the position shown in Fig. 8 and returns the lever 28 to normal upon the engagement of arm ea: of pawl 21 with the lug 36 extending from the arm bl or lever 28,

to the plate PL through the engagement of pawl 48 with the ratchet wheel 38a.

The plate PL and the arm 45 pivoted thereon are now in the position shown in Fig. 5 and the lever 28 in normal position against the stop lug 32 with the pawl 3| disengaged from ratchet -each operation of the handle 66.

now in normal position. The operation of key K3, the second digit of the telephone call designation above mentioned is eifective to operate the yoke 26 for imparting a pivotal movement to arm 45 for actuating the plunger and thereby moving a second group of pins 52 in engageable relation with the test pawl 96 and imparts an angular movement to lever 28 which is proportional to the numerical value of the key, 1. e., equal to eight teeth of ratchet wheel 38, five of which are moved by the plunger 53 to form the interdigit space between the digits and 3 or between any other train ,of pulses comprised in a given call designation, the pawl 49 in cooperation with ratchet wheel 50 holding the plate PL in each advanced position against the tension oi its retractile spring 42 above mentionedl Upon the complete setting of the call designation 0352952, as shown diagrammatically in Fig. 13, which is effected in the manner described in connection with the operation of key members K10 and K3, the operation of handle 66 and that of the gear sector 69 from the position against the stop S1 to abutting relation againstthe stop S2, best seen in Fig. 5, is effective to rotate pinion I2 and the ratchet wheel 12a one turn while tensioning the motor spring 10 which upon the release of handle 66 by the operator is effective to rotate the shaft I4 through the engagement of pawls I7 and I6 carried by gear with the ratchet wheel La. The rotation of shaft I4 as eifected by the gear train which comprises the gear 15 in engagement with pinion I9 which is mounted for rotation with the gear 80 and the engagement of this gear with pinion 82, keyed to the shaft 84, the speed ratio being as above described thirty turns of shaft I4 for each turn of pinion 12 as imparted by the gear sector 69 in its movement from stops S1 to S2.

The rotation of shaft 14 is imparted to shaft 84 by the meter gears 85 and 86 and to shaft 39 in the direction indicated by the arrow in Fig. 10

by the worm 81 and the worm gear 88 having thirty teeth so as to make a complete turn for The rotation of shaft 64 and the four-point cam wheel 89 keyed thereon is effective to impart pivotal reciprocating movement to the bar 93 and thereby to the lever 94 and test pawl 96 at a rate of one reciprocating movement for each and in phase with the pins 52 in the wheel 5|, that is, 120. Upon the rotation of shaft 39 and the passing of the five pins which have been set by the operation of key Km in the path of test pawl 96, the reciprocating movement of this pawl and, therefore, that of 1ever 98 connected thereto is prevented and the insulating segments l0I, I02, I03 and I04 are rotated in a path ineffective relative to'pulsing and shunting contacts P and S, re-

spectively However, upon the passing of the first pin of the ten pin group representing the digit 10 in registry with the test pawl 96, this pawl is permitted to move according to the movement of the cam wheel 89 to cause the pivotal movement of lever 98 for moving one of the insulating cam segments IUI, I02, I03 and I04 as the case may be in the path of the pulsing contact P and shunting contact S for operating them, and the operation of the test pawl 96 is repeated foreach pin in the digit 10 until the first and the succeeding pins of the interdigit group which have been set by the operation of key IQ pass in registry with the test pawl 96 for preventing its operation and this operation is repeated for each succeeding digit and interdigit period in the transmitting of the call as in this example 0352952, by the operation of pulsing and shunting springs P and S as above mentioned.

In the transmitting of a telephone call designation having seven digits as for example 0352952, it is to be noted that the number of pins used for setting such a call designation is thirty-six pins for the digits of the call designation plus thirtyfive for the interdigit pins making a total of seventy-one pins out of a total of one hundred and twenty pins in the wheel 5I so that the movement of the test pawl 96 must be prevented immediately following the transmitting of the last i digit, i. e., 2 as in the call designation 0352952. According to the present invention, the plate PL which, as above described, is held in each advariced position during the setting of the call against the tension of its retractile spring 42 when the wheel 5I is in normal position, the rotation of this wheel as effected by the tension of spring I0 causes the return movement of plate PL to a point wherein the projection OP' engages with the end of lever LX secured to shaft 92 for holding the test pawl '96 from operation by the cam wheel 89, the engagement of projection OP with lever LX being timed to occur immediately following the last pulse of the digit transmitted have been formed as shown in Fig. 17, for example, the knob III) is rotated for moving the pointer II! in registry with the name of the called subscriber, the movement of knob H0 and pointer Ill actuated thereby being effective to position the test pawl 96 in operative relation with the code discs CD formed to represent the call designation corresponding to the name indicated by pointer I I1. Under this condition the operation of handle 66 is effective to tension the motor spring 66 for actuating the pulsing spring P and the shunting spring S under control of the code discs selected in a manner similar to that described in the patent above mentioned.

I is understood that minor changes may be made in the combined repertory and key-controlled call. transmitter mechanism of the invention without departing from the scope of the invention. i

What i claimed is: if

1. A call transmitter comprising a plurality of code discs, a set of key members, digit defining elements set by the operation of said key members, a pulsing mechanism, and manually operable means for operatively associating said pulsing mechanism with said discs selectively and said digit defining elements for transmitting calls either according to the operation of the selected code discs or according to the digit elements set by the operation of said key members.

2. A call transmitter comprising a plurality of code discs, a wheel having longitudinally movable digit defining elements, a common pulsing mechmember. I

3. In a call transmitter, a shaft, a plurality of code'discs and a wheel keyed to said shaft, 9.

plurality of digit defining elements disposed in a row on said wheel, a pulsing mechanism geared to said shaft, said mechanism having a test pawl, a manually operable knob for moving said test pawl in operative relation with said digit defining elements in said row and said code discs selectively, a set of key members for moving groups of said digit defining elements in operative relation with said test pawl for negativing predetermined operation thereof, and motor means for actuating said shaft for sending a call according to the selected position of said test pawl relative to said code discs and said elements.

4. In a calltransmitter, a rotatable shaft, a plurality of code discs, and a wheel keyed to said shaft, said wheel having a plurality of movable digit defining elements mounted thereon, a contact, an actuating mechanism for said contact having a test pawl, a set of key members for moving said elements in position for setting a call, and manually operable means for operatively associating said test pawl with said code discs and the elements set by the operation of said key on members selectively for transmitting series of pulses according to the call set by the operation of said key members and the selective operation of said manually operable means upon the rotation of said shaft.

:"i. In a call -i;ransmltter, a base, a set of key members, a shaft mounted for rotary reciprocat i'ng movement dn said base, a bar secured to said shaft at an angle relative to the length thereof, said key members having arm portions of dif= ferent lengths operatively engaging said bar for imparting angular movements to said shaft cor responding to the numerical value of said key members, a lever carried by said shaft, a pair of supports secured to said base, another shaft mounted for unidirectional movement on said supports, a wheel secured to said shaft at one end thereof, a plurality of longitudinally movable pins disposed in a circular row on said wheel, an upright support having a bearing portion, a plate pivoted on said shaft movable in a plane parallel to said wheel and having a plunger disposed in engageable relation with said pins, another plunger mounted in said bearing portion, an arm pivoted at one end of said plate and having its other end disposed in engageable re lation with the plunger carried by said plate, said arm being disposed for operations by the movement of the plunger in said bearing portion, another arm mounted for pivotal movement on said bearing, a yoke pivotally mounted on the last-mentioned arm, a rod operatively conmeeting the first=rnentioned arm to said yoke, and a pawl carried by said yoke for moving the second-mentioned plunger for operating the secend-mentioned arm for changing the position of a number of said pins on said wheel group by group for setting a call comprising a plurality of digits upon the successive operation of said key members.

6. In a call transmitter a pulsing cam, a contact operable by the movement of said cam, a rotatable shaft, a plurality of code discs and a wheel supported by said shaft, a plurality of digit defining elements mounted on said wheel, a test pawl, manually operable means for moving said test pawl in coacting relation with said wheel and said code disc selectively, a mechanism for imparting a pivotal reciprocating movement to said test pawl in each of said selective coacting relations, one reciprocating movement for each of said pins on said wheel, said digit defining elements being normally positioned in a path out of coacting relation from said test pawl, a mechanism actuated by said test pawl to cause the operations of said contact by said cam, a set of key members operable for positioning groups of said digit defining elements in coacting relation with said test pawl for setting a call, an index member, name cards, a manually operable mechanism for moving said index on said name cards for indicating the selected position of said test pawl relative to said code discs and said wheel and motor means for actuating said shaft for transmitting such call.

7. In a call transmitter, a pulsing mechanism having a test pawl, a shaft geared to said mechanism, a cam and a wheel keyed on said shaft, a plurality of pins mounted on said wheel and movable longitudinally for association with said test pawl, a set of numbered key members operable for moving groups of said pins in such association for controlling the operation of said pulsing mechanism upon the rotation of said shaft, a pair of supports for said shaft, one of said supports having projections extending perpendicularly thereof, a disc mounted for sliding movement on said projections and disposed for engaging said pins, said disc having a collar portion, a crank shaft, a forked lever having one end pivoted on said crank shaft and engaging the collar portion of said disc, a roller mounted at the free end of said forked lever and normally positioned for engaging said cam upon a move ment of the latter for returning said pins to nor mal position through the operation of said disc, following the transmission of the call set by the operation of said key member, a handle for rotating said crank shaft for moving said roller out of engagement from said cam to render the movement of the latter ineffective relative to said disc for permitting repeating said call, the movement of said handle in another position resetting said pins in normal position independently of said cam.

8. In a call transmitter, a pulsing, contact, a test pawl, a rotatable shaft, 9. wheel, actuating means for imparting pivotal reciprocating movement to said test pawl, a ratchet wheel keyed on said shaft, a plurality of operable digit defining elements mounted on said wheel, a mechanism for moving said elements in coacting position with said test pawl for controlling the operation of said contact, said mechanism comprising a set of key members, a pivoted shaft, a bar and an arm secured to said shaft, said key members having means cooperating with said bar for imparting angular movements to said arm proportional to the numerical values of said key members, an upright support having a bearing, another arm mounted for pivotal movement on said bearing, a yoke pivoted on the secondmentioned arm, a rod operatively connecting the first-mentioned arm and said yoke for imparting movement to said yoke and to said secondmentioned arm upon the operation of each of said key members, a pair of ratchet wheels mounted for rotation as a unit on said rotatable shaft, said second-mentioned arm having a pawl engaging one of said wheels, a plate mounted on said rotatable shaft having a pawl engaging the other ratchet, wheel of said unit whereby the movement of said second-mentioned arm is imparted to said plate another pawl carried by said plate engaging the first-mentioned ratchet for holding said plate in each advanced position relative to said wheel, a plunger carried by said plate positioned relative to a number of said elements upon each operation of said plate, a mechanism actuated by the pivotal movement of said yoke for moving said elements in coacting relation with said test pawl for setting a call, and

retractile spring for returning said plate to normal position during the transmitting operation of such call.

HAROLD W. GOFF.

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