US1317152A - blessing - Google Patents

Description

I. G. BLESSING.

' SAILING DEVICE FOR AUTOMATIC TELEPHONE SYSTEMS.

VM rucmmn man Nov.22. 19|s.

1 ,3 1 7, 1 52 Patented Sept. 30, 1919.

2 SHEETS-SHEET I.

APPLICATION FILED NOV. 22,1916- Patented Sept. 30,1919.

ZYSIIEETS-SHEET 2.

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UNITED STATES PATENT OFFICE.

l JOHN G. IBLESSING, OF CHICAGC, ILLINOIS, ASSIGNOR TO AUT'OMATICVELECTRIC COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS.

CALLING DEVICE FOR AUTOMATIC TELEPHONE SYSTEMS.

To all whom it may concern:

Be it known that I, JOHN G. BLussING, a citizen ol the United States of America', and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Calling Devices for Automatic Telephone Systems of which the follmving is a specification.

lii y invention rela-tes in general to calling devices, or impulse senders as they are sometimes termed, for use at the substations in an automatic Jtelephone system, and the principal object of the invention is to coinbine a calling device and a desk telephone in one instrument in order to form a more compact and eilicient substation set than has hitherto be-en available.

The foregoing and other useful objects are attained in a manner and through means lwhich will be fully described and explained hereinafter reference being had to the aeconipanying drawings.

In the drawings, Figure 1 is a vertical cross section of a desk type telephone embodying the princi ples of my invention, Fig. 2 is a horizontal cross section taken on the line Z, Fig. 3 shows a mounting plate contained in the base and carrying the impulse sending mechanism proper, Figs. 4 and 5 show details of the said mechanism, Fig. 6 is a front view in perspective showing the sliding finger hole dial, Fig. 7 is a detail shdwing of the dial locking device, and Fig. 8 is a circuit diagram.

Referring now particularly to Figs. 1, 2, and 7, the base 2 is preferably a metal stamping of the form shown in Fig. 1. heavy metal ring 9, which is turned down to a smaller diameter at its upper end, has its lower end fitted inside the base and secured thereto by brazing. Theupright frame is made of a: tube 8 which is fitted over the upper end of the ring 9 and which is also brazed or soldered to the ring. The tube 8 is cut away in front and in back leaving only two upright portions 13 and 14, seen clearly in Fig. 7, which support at the to a transmitter head 5. A plate 15 exten s from the ring 9 to the transmitter head 5 and is in line with the front edges of the uprights 13 and 14, to which it may be soldered or brazed, and which in addition to strengthening the frame, afords a means for mounting the receiver hook and also serves as a Specileation of Letters Patent.

Patented Sept. 30, 1919.

runway for the slidable linger hole dial, as will appear more clear] y hereinafter.

The slidable setting member, herein for convenience termed a dial, comprises a curved segmentl'?, which is cut from a tube of slightly smaller diameter than the tube 8, and which is secured to two metal blocks 18 and 19. The back plate 20 is secured to the blocks 18 and 19 by short screws two of which may be seen in Fig'. 1. A glass plate 21 is clamped between the blocks 18 and 19 and the back plate 20 and has affixed to its rear surface a card bearing the usual. series of digits from 1 to 0. The dial as a whole is adapted to slide up and down between two flanges 6 and 1G on the plate 15, a segment of the ring 9 beingl cut away at il 1 to permit the lower end of the dial to pass through. The dial is held in place by the outer tube 4 which fits closely over that portion of the tube 8 which has not been cut away and which has an opening in front of the dial, as is'best seen in Fig.' 6. The outer casing is completed by the cap 24 which fits down over the transmitter head 5 and the tube 4.

The receiver hook passes through a slot in the cap 24 and is pivoted to the plate 15 by means of a screw 32. Just inside the cap 24 the hook rests on a lug 33 attached to a vertically slidable rod 34 by means of which the ntaet springs 3G, ,37, and 38 are controlled. The lower end of the rod 34 is turned down as at 39 and passes through a hole in the rin 9. When the receiver is removed the hoo i is raised under the influence of a spring which is compressed between the larger diameter of the rod 34 and the ring 9.

Referring now more particularly to Figs. 3, 4, and 5, the base plate 3 may be mounted within the base 2 in any suitable manner, being, however preferably secured to the ring 9 by means of two screws 40 and 41. The senneireular fiber ring 44 carries the terminals 45 which afford a means for connecting the conductors of the usual flexible cord with the instrument wiring. Also mounted on the plate 3 are the impulse springs 42 Aand 43 and the hook springs 36, 37 and 38. The mechanism for controlling the impulse springs 42 and 43 comprises a shaft 48 which is clamped between the mem bers 46 and 47 and secured 4to the plate 3 by means of screws 54 and 55. The shaft 48 b elcesiwtieii werme- 'be t the said ring.

carries n drum wheel 49 which has u hub 50 nponwvhichis mounted n. loose ratchet Wheei 51. The fiber impulse Wheel is rigidly secured -to the ratchet 51. Motion -is transmitted from the drum Wheel 49 to the imulse Wheel 52 by means of a, pawl 54 which 1s adapted to engage'the teeth in the ratchet 51. The relation of these pnrts may be readily Yunderstood from. Fig. 5. The dru-ni wheel 49 is hollow und contains ir clock spring 53 which is fa'st'ened t one end to the shaft 48 and et the other end to the wheel-49.

The yimpulse sendin mechanism which has 'justibeendes'biib is controlled or set tliefslidihg-dil throii h 'connecting dey scribedv yIn 1 isfseeifef cylinderf which 'passes througi the 'hble in riiig ali'd"'is"sui`te'bly secured Between 4.the cylinder 56 and the plate 15 there is slidably mounted 'firr'ieiriber 27 which has at its upperend n right angle bend i'secnred to the hub 26, end t'its lovveil end'zrtongiie which pro e'cts :throught slot 7 in the plete 15 en" supports'the finger hole 'dinlll Lateral movement' of the member 27 above is preventedb'y the erosspiece 57, shown in QFig. 7; 'slot 12 is eut-"in ring '9' to permit the passagcoffthe tongue"29. Motionis enihunietedfrom the slidi member 27 and mechanical relation of the various parts oi my improved ceiling device, l will now proceed to explain the iminner in which tlnl seine is operated.

The function of u. device of thisI rlniratcter, :is is Well known, is to produce series o-IE breaks or interruptions in the sulisi'ntion line circuit corresponding to the difi'in'ent digits in :L called number. Bearing this feet in mind und with occasional references to the circuit diagram of Fig. is, the explanation of the operation muy be proceeded with.

W hen the receiver is on'the hook, which is theiiorrnel condition, the contact s rings 37 'zi-ndBS :trein enga ement, wherey the ringer Klis connected in'bridge of the line conductors 71,es see'n in.Fig. 8. Vlfheiiiin'4 this conditionV the substation is ready to receive calls.

When the receiver is removed to initiate :L cell, the rod 34 is raised by the spring 35, whereby the Contact springs 37 and 38 nre seperated :ind the former spring brought into engagement with Contact spring 3G. As the result of the shifting of these Contact springs the ringer K is disconnected and the seriell)v connected receiver R and transmitter T ere bridged across the line conductors in the lusuel manner. In addition to shifting the switching Springs, the rod 34, by means of tl 'e lug 33, disengages the lever 61"of the dial locking device the projection 63. The removal of the receiver, then, places the circuits et the substation 'in condition for talking and" unlocks the dial. At the eziehange, in the vmore g'enerally 'used systems, the"1eni0val"of the receiver at' one of the substations is followed by` the'automatic operation of preliminary trunking eppnretus whereby the calling 'line is eXtended'to an idle selector switch.

The calling subscriber will non7 proceed to Amanipulate his calling device in accordance with the first digit of the desired number, which will be assumed to 'be the digit 5. `The operati-on is'as follows: The linger is placed in the finger hole of the dial corresponding to thedigit 5 and the dial is pulled down until thefinger strikes the stop 80,"after which the linger is Wi'th'- drewn to permit the dial to return to normal. When the dial is pulled down it cerres with it the sliding member 27',V whichin turn, operates to, unwind the steel ribbon 28 rfrom the drum'irvheel 49, thereby turnu ing the latter to tension the clock spring 5'3. Additionally 'the piston 25 i's forced down in the cylinder 56 end'some of the air in' the cylinder i's'fforeed out ast the tapered screw 60. The' drum whee 4'9`is of rsuch diameter thttt when (the dial is ulled for the"'di'git 5 thes'eid wheel' Will be rotated by lthlunwlndiig" of""the" Iibbon 28 e suiiicnt distnce'to eeuse'the awl 54 to pesve teethf'the retehet whee 51. New

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when the dial is released by the linger of the operator, the drum wheel 49 is returned to normal by the clock sprin 53, thereby winding up the ribbon 28 an raising the dial until the tongue 29 reaches the top of the slot 7. As the drum Wheel returns to normal the pawl 54 engages the last tooth of the ratchet wheel past which it 'was rotated whence it follows that the return movement of the drum Wheel is accompanied by the rotation of the ratchet wheel. Since the teeth on the impulse wheel 52 are spaced the same as the teeth on the ratchet wheel 5l it will be obvious now that on the return of the drum wheel to normal the impulse wheel will separate the impulse springs l2 and 43 five times to cause tive brea s or interruptions in the line circuit. The speed at which the impulses are transmitted may be varied by adjusting the tapered screw 60 which regulates the admission of air to the cylinder 56.

The selector switch at the exchange having operated responsive to the interruptions just produced in the line circuit, the calling subscriber may now proceed to manipulate his calling device in accordance With succeeding digits of the desired number whereby additional series of interruptions are produced in the line to cause the successive operations of other automatic switches to complete the required connection. 1t is understood that each time a digit is pulled on the dial, the paWl on the drum wheel is rotated past a corresponding number ot teeth on the ratchet wheel, so that the number of impulses transmitted will in every case correspond to the digit called.

It will be seen from the foregoing that I have made radical changes and improvements in calling devices of the general character described, whereby a calling device and a desk telephone are combined to form an, exceedingly compact and eilicient substation telephone set. Departures may be made from the exact structure disclosed, and I do not, therefore, wish to lilnit myself to the precise form shown in the drawings, b-ut desire rather to include and have protected by Letters Patent all modifications of my invention which may hereafter be devised, limited only by the scope of the appended claims.

What I claim as my invention is:

1. In a substation telephone set, the combination with a rotary impulse sender, of a longitudinally movable setting member, and connecting means whereby said sender may be variably controlled through the medium of said setting member.

2. In a substation telephone set, the combination with a rotary impulse sender, of a single setting member movable only in a strai ht line for variably controlling said impu se sender,I and means for translating the linear movement of said setting member into a. rotary movement of the said sender.

3. In a substation telephone set, a line circuit, a rotary device for interrupting said circuit, and means Afor controlling said device comprising a longitudinally movable finger hole dial.

4. In a substation telephone set, a lino circuit, a spring controlled wheel, a single longitudinally movable setting member adapted when operated to rotate said wheel from its normal position against the tension. of its controlling spring, and an impulse sending device variably actuated by said Wheel on its return to normal to produce interruptions in the said line circuit.

5. In a substation telephone set, the combination with a desk telephone having an upright tubular casing, ot a rotary impulse sender, and a setting member for said sender slidably mounted inside said casing.

6. In a substation telephone set, the combination with a desk telephone having an upright tubular casing, of a rotary impulse sender, and a setting member for said sender mounted inside said casing and having a series of finger holds disposed on a line parallel thereto.

7. In a substation telephone set, the combination with a desk telephone having an upright tubular casing, of a rotary impulse sender, and a setting member for said sender movable on a line parallel lo the said casing.

8. In a substation telephone set, lthe combination with a desk telephone having an upright tubular casing, of a rotary impulse sender, a manually operable controlling member for said sender disposed within the said casing, an opening in the casing in front of the said member, and linger holds in the said member accessible through said opening.

9. In a substation telephone set, the coinbination with a desk telephone having a base and an upright frame, of an impulse sender in the base of said telephone, and a setting member for said sender slidably mounted on said frame.

10. In a substation telephone set, the combination with a desk telephone having a base and an upright frame, of an impulse sender in the base of said telephone, a setting member for said sender Slidably mounted on said frame, and means for communieating the movement of said setting member to the said sender.

l1. In a substation telephone set, the combination with a desk telephone having a base and an upright frame, of an impulse sender in the base of said telephone, a sliding setting member mounted on said frame, and means for controlling said sender through the medium of said setting member.

12. In a substation telephone set, the combination with a desk telephone having a base and an upright frame, of an impulse sender in the base of said telephone, a yn ianually operable setting member slidably I Iiol'mtel on said frame, and mechanical. connecting means between the said setting member and the said sender.

13. In a substation telephone set, the combination with a rotary impulse senderLof a setting member for said sender mounted independent thereof, and Yflexible connecting means lwhereby the said sender lmay Abe controlled through the medium of said setting member.

y111. In a substation telephone set,`the`eon1 binatibn with a line circuit, of a ,rotary iin- `pulse sender for producing nterrupti ns in said 1i e, and an air controlled'speeegovernor igor lsaid sender.

15. In a substation telephone set` the combination with a line circuit, of a rotary im pulse sender for producing interruptions in said line, and a retarding device compris ing an air cylinder and piston for regulating the rate at which said interruptions are produced.

16. In a substation telephone set, the combination with a rotary impulse sendin device, of a manually operable contro ling Gopiel of tllm patent myay be obtained for member therefor movable only in a .straight line, and lookin n'ieans for said controlling member control ed by the receiver hook.

17. In a Calling device, a rotary impulse sending mechanism, and a manually operable controlling member provided with finger iqIlcls arranged in a straight line.

1 n a substation telephone set, a desk telephone having a base and an upright tubular casing, an impulse, sender within the said base, a rectangular opening in the said casing, and a controlling member for said sender disposed within the said easing behind tlie said opening.

19. In a substationI telephone set, a desk telephone having a, base and an upright tubular casing, an impulse sender Within the said base, a rectangular opening inthe said casing, a controlling member for said sender disposed within the said casing behind the said opening, and a plurality of finger holds in the said controlling member.

Signed by 111e at Chicago, Cook county, 'i

State of Illinois, this 14th day of November, 1916.

JOHN G. BLESSING.

give `cents each, by addressing the Commissioner of Patents, Washington, D. 0. A I

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