US1036056A - Impulse-transmitter. - Google Patents

Description

C. R. A'ST IMPULSE TRANSMITTER.

APPLIGATIOH NLRB IBB. 15, 1911.

Patented Aug. 20, 1919.

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G2 TJSTHL UJPULSE TRANSMITTER.

APPLICATION FILED FEP. 15, 1911.

Patented Aug. 20, 1912 C. R. AUSTIN.

IMPULSE TRANSMTTER.

APPLICATION FILED 125.15, 1911.

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CHARLES R. AUSTIN, OF LGS ANGELES, CALIFORNIA, ASSIGNOB, TO SOUTHERN CALI- FORNIA MANUFACTURING COMPANY, F LOS ANGELES, CALIFORNIA, A CORPORA- TION OF CALIFORNIA.

IMPULSE-TRANSMITTEB.

Specification of Letters Patent.

Patented Aug'. 20. 1 912.

Application led February 15, 1911. Serial No. 608,818.

l Angeles, in the county of Los Angeles and State of California, have invented a new and useful Impulse-Transmitter, of which the following is a specification.

This invention relates to a dial operated impulse transmitter for telephone systems, and the main object is to furnish a more perfectv electric impulse and to produce the impulses consecutively'otl uniform character. '.lhe ordinary impulse transmitter is operated mechanically and involves a spring and governor which are liable to vary somewhat inoperation, both as to time and character; while, in the present invention the mechanism of the impulse transmitter i-s operated electrically and exactly measures each impulse, so that. all impulses are substantially uniform and in more perfect time.- This enables the switch to be operated much faster and withgreater accuracy. Any inequalities in the impulse affects both the impulse transmitter and the switch, whereby the members sent out by the impulse transmitter will necessarily correspond with that setby the switch. Another advantage is that there `is no return movement ot' the manually operated indicating arm which, when onceplaced on a certain number, will stay on that number and repeat the same unless reset at another number.

Another object is to produce automatic ringing, whereby thev operator sets thc indicating arm at the number to be called, the dial mechanism then automatically transmits the required impulses to properly set the switch andwhen the switch is set, the dial mechanism automatically sendsl the ringing current over the line for a definite period, at the conclusion ot which the ringing stops, this operation taking place without attention of the operator, except. the setting of the indicating arm at the number to he called.

Referring to the drawings: Figure l is a front elevation. Fig. 2 is a plan view. Fig. 3 is a rear elevation. Fig. 4 is a section on line act-c4 in Fig. 3. l `ig1 5 is a diagrammatic view showing the manner of connecting the instrument in a system. Fig. (3

diagrammatic view showing the dial member separated from the switch member. Fig. 7 is a sectional view on line aci-x7 Fig. 6.

1 designates an angle iron to which is attached a bracket 2 by means of screws 3, and screwed in the bracket 2 is a stud 1. A shaft 5 has one end journaled in the stud 4 and its other end journaledin the upright arm G of the bracket 2. series of contacts 7 are clamped between two rings 8, being` linsulated therefrom by rings of insulation 9, the rings 8 being secured to the angle iron 1 by screws 10 and to arm 6 by screws 11, which screws pass through a supporting plate 12, the inner ring 8 being separated from the plate 12 by sleeves 18. Secured to the supporting` plate 12 is a dial 111 being attached by screws 15. i

Rigidly attached to the shaft 5 is a ratchet lwheel 16 and attached to the shaft 5 is abrush 17 which, as shaft 5 revolves, wipes the contacts 7. The brush 17 has a disklike hub 18 and a wiping spring 19, which passes through and is held by ring 8, and makes electrical Contact wit-h the disk 18 of the brush 17 when the latter is in any position. The dial 14: has a series of holes 20 arranged .in a circle and numbered from one to titty, or as many, more or less, as may be required, according to the capacity the instrument is to have, the designating number of the hole being shown .inclosed in a circle 21 and arranged opposite every fifth hole. .lournalcd in the supporting plate 12 is a shaft 22 to which is attached an arm 23 and riveted to the arm 23 is a spring 24 on which a handle 'lhe inner end ot' the handle has a plug 2G adapted to fit loosely in any ot' the holes 20 and being held firmly in any hole in which it is placed by the tension of spring 24, thus preventing the arm 23 and shaft 22 from turning accidentally. ly pulling the handle 25 out until the plug 26 is t'ree from the hole in the dial, the handle and its carrying arm 23 can be revolved in an arc over the face of the dial, allowing the plug 26 to be placed in any of the holes 20. -Fixed to the shaft 22 at the back ot the dial 14 are three brushes 27, and 20. '.lhese brushes at the pointwhere they are attached to the shaft are larger than the shaft.,- thus forming a dislililte hub or rim which projects as a iange from the shaft.. lhree wiping springs 2Q,

31 and 32 are' attached to the supporting plate 12 by a screw 33 and insulated therefrom@ and from each other byfinsulation 34. The three wiping'springs 30, 31 and 32, respectively, make contact with the thrcedisklike hubs of the wipers 27, 28 and 29, irrespective ot the angular position of the latter.

An electric magnet 35 supported on the t angle iron 1 has an armature 36 pivoted at pivoted at 47 and having an arm 48 which normally rests against the pawl 43. A spring 49 causes the armature 46 to hold both pawls 43 and 41 out of engagement with the ratchet wheel 16, exceptwhen the magnet45 is energized and armature 46 is attracted. The arm 48 has an extension 50 which controls two electrical contact springs 51 and 52. A stop pin in the ratchet 16 normally rests against a pin 54 in the vso bracket` 2, -being held there by the tension of a spring 55 whichfencircles shaft 5 and forces the ratchet wheel 16 inwardly, also causing brush 17 to rest on contact a,

' revolved until the plug or jack 26 can be In operation, to call a number by means of the dial, the handle 25 is pulled out until spring 24 rests against the arm 23 and then placed in the hole 2O in the face of the dial corresponding to the number to be called. As the arm 23 is thus revolved, the hub contacts 27, 28 'and 29 turn therewith and contact 27 comes to rest on a contact 7 correspending to the number of the jack in which the plug 26 is placed. The hub contact28 y rests on a Contact 7 (preferably the second) tollowing that on which contact 27 rests, while the contact 29 rests on a contact 7 following that on which the contact 28 rests, but removed therefrom by a number of kintervening contacts. 7, depending on the length ot' ring to be given, which is determined by properly adjusting the angular relation of the contact-.29 to the contacts 27 and 28. A key 56 is then pressed which locks itself down and connectsthe dial by a relay 57 to a trunk and energizing release ymagnet 45, the circuit being made from battery b, through wire 45d to wire 45/ to wire '45b to wire 45a, through the winding of release magnet 45, through wire 60 to wire 59 to relay 57, and through the windings-there-V of to wire 58 to key 56 to ground and from ground to battery Za. Battery current now l fiows through wie 45 to resistance R, through Wire 83 and Wire 83 to contact 57 u of relay 57 (the armature of relay 57 being up), thence through wire -57b to sleeve side ot' trunk. Relay 57 and release magnet 45 are now energized and their armatures are up. Release magnet 45 on becoming energized` allows pawls 43 and 41 to engagethe ratchet 16 and close contacts 51, 52. Cir.

cuit is then made from battery b through wire 45d to armature45f which is down, through wires 61, 62 to contact 63 vof vibrating relay C, and through the contacts 63, 64 of the latter, through winding of magnet C, thence through Wires 66 and 76 to contacts 52 and 51 of magnet 45 to wire 67 to ground. This starts relay C vibrating and sends pulses of current from middle contact 63 of relay C to top Contact 65 of same, through wire 68 to magnet 35, to wire 69 to ground, and also through left hand contact ot' relay D and wires 70 and 71 to contact-72 of relay 57, to wire 73 land tip of trunk line. Each pulsation'from relay-C passing through' Wire 68 thus energizes mag net 35 and causes pawl 41 acting on ratchet 16 to move brush 17 `one contact, also passes out on .the trunk line to set up' the trunk switch TS one contact, so that for every contact that brush 17 is set up, the brushes of ther trunk switch are set up correspond ingly. The construction of the trunk switch TS and the circuits which connect it with the dial operated impulse transmitter form no part of the presentinvention, but comprise the subject matter of a companion application of mine filed March 16th, 1911, serial No. 614,948.-

In Fig. 1, the arm 23 of the dial is set in the ninth hole (the first being 0), and the movable contact 27 rests on the corresponding contact 7. When the vibrating relay C has given eight impulses, contact 17 will rest on the same contact as the movable con` tact 27 and the brushes of the line switch will rest on the ninth set of contacts, a'circuit now being established as follows, from battery b, wires 45d, 45, ,45", 45e to brush 17 to contact 27, through wire 74 to winding of relay D, through wire 75 and Awire 76, to

contacts 51, 52, and wire 67' to ground, thus energizing -relay D. -The relay D on becoming energized attracts its contact 77 and breaks the connection betweenvwires 68 and 70, thereby opening the connection from vibrating relay C to the trunk line and stopping the brushes of the trunk switch and connects wire 70 with wire 78 and through the medium of contacts 79 of relay E with wire 80, to winding of relay B, thence through wire 75, wire 76, contacts 51 and 52 to ground, which connects directrbattery through contacts of relay B, wire 61, contact 81 of relay D, and wire 82, to wire '83 ot trunk line, thereby shunting out resistance R and locks itself up by connecting its Winding to battery through its own contact, by reason of its coils being energized 'and back 'to generator (l.

insecte through Wire 45g, which holds its contact 45h closed. Armature 77 now being attracted breaks connection of Wire from Wire 68,

preventing further impulses from being sent over the line from relay (l.

If subscribers line is busy7 the circuit Will be closed through his instrument and the battery current on the sleeve side of the trunk passing` through subscribers line and instrument comes back on tip of trunk, through Wire 73, Contact 72, Wires 7l and 70, to Contact 77 of relay D, through Wire 78` contact 79, wire 80, thence to Winding ot relay B, thence through Wires 7 76, to contacts 51 and h2, thence to ground, thus venergizing relay B which attracts its armature a' and lights lamp 84 through thefolloiving circuit: Battery current from Wire 45"vv passes to wire 84, thence to lamp ,84, contact 75a, Wire 75, wire 76 to contacts 51, 52, Wire 67 to ground. lighted indicates to operator that 'the line is busy; relay B also opens battery to vibrat- -ing relay C rendering it inoperative and preventing ringing on a busy lino. A subscribers line .not being in use, brush 17 continues movement until it makes a contact with contact 28, when battery current from brush 17 flows to contact 2S through wire 28a to relay E and through'wire 28h to contact 75a of relay B, thence through wires 75, 76 and contacts 5l and 52 to ground. Relay E becoming energized locks itself up bv closing its own contacts to battery from its Winding 'through Wire 175g and also opens connection trom wire SO to relay E and connects ringing current to wires 78 and 70 and trunk line. 'The circuit for ringing which is thus made is from generator G, wire g to contact 75), wire 78, 'Contact 77, n'ire 70, Wire 7l to contact 73 and wire 73 ot the trunk line, thence by any suitable circuits through the subscribers instrument Brush i7 continlt in motion traveling- 5 across the several 'intcrveiringcontacts 7 until it roaches contact 2l-l, when battery current from brush 17 passing., to contact i?l, through Wire 25) to coils ofthc restoring magnet lP to ground.

lencrgizes coils l?, which releases liey 56.

Releasing lrev 5o opens contact through release magnet. l5 and relay 57. ARelease magnet 45 on becoming doinergizcd diseugages pawls il and stil from ratchet lo and brush l?, drops bar-l( to normal position, also con tarts ot' release magnet #l5 being open, break ground circuit for relays ll, li and .il and restores everything to normal position. Relay 57 dropping back disconnects the impulse transmitter from trunk.

A brief summary ot the operation is as follows: Upon pushing the button 5G, relay 57 and release magnet ft are energized and the latter starts the vibrating switch C Wnich operates during the travel o' brush The lamp S4 beingi 17 from the starting point. lllfhen brush i7 reaches the contact 27, relay l) is energized and it" line is busy, relay B will be ener gized, also. lighting lamp 8l. Upon brush t7 reaching contact 28, relay E is energized which starts the ringing current over the line whichv continues until brush 17 reaches contact :29, whereupon the hey is aut-ornati -cally released by coils F and all parts are Athe dialmember separated from the :switch member. The construction of the two parts as'separated is unchanged, While thecoir tacts 7 areV connected with the associatedl contacts 7, by 'Wires w. Unly few of the wires 'w shonn; the rest being omitted tor clearness ot illustration.

liVhat ,it claim is:

l. A dial, an indicator movabler into :various positions thereon, a switch member with stationary contacts in definite relation to the dial, a movable contact having delinite relation to said indicator and movablev into contact with any of said stationary contacts, a traveling brush adapted to travel along and contact with any oit said stationary contacts, a magnet With means for ad vancingr said brush 'one contact each time said magnet is energized, and means for intermittently energizing said magnet 'to move said lnush Yto the Contact on which said movable Contact rests.

2. A dial, an indicator movable into various positions thereon, a switch member with stationary contacts in definite relation to the dial, three movable contacts having definite relation to said indicator and mov- .able into contact with three correspondingly spaced stationary contacts, a traveling brush adapted to travel along and contact with aniv ot said stationary contacts, a magnet with means tor advancing said brush. one contact. each time said magnet energized, means tor intermittently energizing said magnet. and'means lor restoring said brush lo normal position upon its reaching the third movable Contact.

il. fr dial, an indicator movable into various positions thereon, a switch member with stationary contacts in Llcl'inite relation to the dial, three movable contacts haring dclinite relation to said indicator and movable into contact with three correspondingiyY spaced stationary contacts, a traveling brus i adapted to travel along and contact with any of said stationary contacts, a magnet with means for advancing said brush one contact each time said magnet is energized, means for intermittently energizing said magnet, means for restoring said brush to `pawl, a vrelease magnetfor releasing said pawl, and ai vibrating relay connected with the operating magnet.

5. A dial with a series of holes, an indicating arm movable over the dial and provided .with means for engaging any of said holes to retain the indicating arm in vposition, a switch member provided with a series of stationary contacts, a shaft operated by said indicating armfa plurality of movable contacts carried by said shaft and movable finte engagement-with any of the stationary contacts, a brush adapted to travel along said stationary cont-acts, another shaft to carry said brush, means for 'intermittently actuating thelatter shaft in one direction, and means for nioif'ing the latter shaft in reverse direction when said actuating means is released.

6. A dial, an indicating arm movable over the dial, means for detachably holding the indicating arm in position on the dial, a series ot" movable contacts operated by said indicating arm and movable into engagement with any of the stationary contacts, a brush movable across the stationary contacts,

4 a shaft carrying said brush, a ratchet wheelv on said shaft, a .pawl for operating said ratchet, an Aoperating magnet for actuating said pawl, a release magnet fork releasing said pawl, and spring means for restoring said ratchet, shaft and brush to normal position when said pawl is released.

7. Al dial, an' indicating arm movable over the dial, a plurality oit movable contacts 'operable by the indicating arm overthe s'tationary contacts, eacbof saidmovable contacts having a/fiange at its inner end, a plurality of wipers engaging the respective flanges, a brush rotatable over the stationary contacts, ashatt carrying saidg brush, an operating magnet with means for actuating said brush in one direction, a release magnet -for releasing` saidf actuating mea-ns, and

leased.

v8. ln` combination, 4two terminals at least A one off which is rotatable to alter the disy tance between said terminals, a Vmember f movable from one terminal to the rotatable terminal, means for moving said member, and means coact-ing with said member for producing a definite number of electric impulses corresponding to the distance between said points during the, movement of said member toward the variable terminal.

9. In combination, means including a v Vmember movable through an are for producing a number of electric impulses in definite relation to its travel, a contact rotati'iblyA adjustable to various positions in said are, and means for stopping said impulses when said member reaches and makes contact with said adjustable Contact.

10.'In combination, meansv including member movable through an arc for producing a number of electric impulses in definite relation to its travel, a contact adjustable to various positions -in said arc, means for's'topping said impulses when said meinber reaches and makes contact with said ad justable contact, another contactadjustable beyond the first contact, and means for maintaining a ringing current during the travel of said member from the first mentioned contact to the latter contact.

11. ln combination, means including a member movable through an are forproducing a number of electric impulses in definite relation to its ti'avel,'a contact adjustable to lvarious positions in said arc, means for stopping .said impulses when said member reaches and makes Contact with said adjust able contact, another contact adjustable be yond the first contact, means for maintaind ing a ringing current during the travel of said member from the first mentioned coni tact to the latter contact, and means operating when the member reaches'the latter contac't for returning said member. to normal position. l.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 18th day. of January, 1911.

`CHARLES R. AUSTIN.

In presence ofl G. T. HAGKLEY, FRANK L. A. Girar-IAM.

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