US2399961A - Operating phonograph over communication circuits - Google Patents

Description

y 1946- H. R. VAN DEVENTER 2,399,961

OPERATING PHONOGRAPH QVER COMMUNICATION CIRCUITS v Filed Jan. 15, 1944 3 Sheets-Shet l Fig-.2-

y H. R. VAN DEVENTER 2,399,961

OPERATING PHONOGRAPH OVER COMMUNICATION CIRCUITS Filed Jan. 15 1944 3 Sheets-Sheet 2 iqzE- y 7, 1946- H. R. VAN DEVENTER 2,399,961

OPERATING PHONOGRAPH OVER COMMUNICATION CIRCUITS Filed Jan. 15, 1944 I 3 Sheets-Sheet 3 I i l 89 I6 as 5 66 7%; 93 90 -||0 J09 FEE Q :09 H I2 Invenfor Harry R WznDevenfer- L2 Jfforngr S Patented May 7, 1946 OPERATING PHONOGRAPH OVER COM'MUNICATION CIRCUITS Harry R. Van Deventer, New York,-,.N. Y. Application January 15, 1944, Serial No. 518,346

48 Claims.

This invention relates to operating phonographs over communication circuits, and has for an object the provision of means operable over such circuits for connecting a phonograph thereto and either supplying via the circuit the necessary current for directly operating the phonograph motor, or (if a spring-wound motor or the like is used) supplying current via said circuit to wind the spring motor.

Another object is to provide circuits and instrumentalities in combination that will enable phonographs to be connected to lines terminating in the usual exchange equipment wherein the motors for the phonographs can be operated by current from a source located at the exchange and supplied. the phonograph motor via the cord circuits in the exchange when same are connected to the line circuit.

Figure 3 is a diagram of an alternate arrangement embodying the invention;

Figure 4 is a diagram of an alternate arrangement embodying the invention;

Figure 5 is a diagram'of the circuit connections of a cord circuit that may be used to connect telephone lines-shown in other figures;

Figure 6 is a diagram of the circuit connections f using a mechanical motor to operate the phono- 1 graphs when applied to a telephone system;

Figure 7 is a diagram of the circuit connections of a cord circuit that can be used to operate the A further object is to provide circuits and able a telephone and phonograph to be operated conjointly on the same line circuit when connected to the exchange equipment now in common use, and where the motor for operatingthe phonograph is energized by current supplied via the telephone line.

instrumentalities in combination, that will en- Other objects will be apparent from the following specification wherein by way of illustration preferred embodiments of the invention are disclosed. It will be apparent however that once the inventive concept herein disclosed is understood,- many modifications will be apparent; their as limitative but as defined in the appended claims.

It will be understood that by the term communication circuit" is meant a ciruilt, Inch as a telephone circuit or any other circuit'over which speech or signals are transmitted, and over which such signals and operating current for the phonographs may be separately or simultaneously transmitted. Such lines have certain normal charac teristics which might be interfered with by the disturbances created by the"phonograph motors connected thereto. Therefore, means are herein disclosed for filtering out such disturbances by means of filters connected to the motors and the circuits whereby the normal characteristics of the circuits are preserved.

illustrations therefore are not to be considered winding motors shown in Figures 6 and 8;

Figure 8 is a diagram of the circuit connections using a mechanical motor to operate the ph0n0 graphs when applied to a telephone system, and, Figure 9 is a diagram of the circuit connections of a telephone instrument and phonograph combination embodying the invention.

Inthe prior U. 8. Patent Number. 2,332,359, dated October 19, 1943, and U. S. application Serial Number 509,544, and flied on November 9, 1943, are shown phonographs that may be connected to telephone lines to transmit and record speech thereover. As shown in this patent and application, the phonographs are operated by motors connected to a local source of current, such as the electric lighting circuit on the subscriber's premises where the phonograph is located usually adjacent the subscriber's telephone. Withsuch an arrangement the operation of the device is dependent upon the current supply which is often not under the control of the teleequipment. a

I In many cases where it is desired to use phonographs on telephone lines, no electric current is available. This is especially true in isolated rural communities. With the system herein disclosed the phonographsare operated by current that may be supplied over the telephone lines, thus placing all of the apparatus and the current sup- 7 ply therefor under the control of the telephone company.

It will be understood that the telephone line wires Li, L2 inthe fi ures may connect to the In the accompanying figures:

Figure l is a diagram 01' the circuit connections and arrangement of devices therein when the ment embodying the invention;

usual central oflice e ipment in common use. Such equipment in the case of a so-called common battery system includes the usual line and cut-ofl relay, line lamp, Jacks, .etc., all of which may be of any desired and known type. Such oilices have switchboard cord circuits for connecting the various lines, and these may be of any known type, it being one of the objects of this invention to provide circuits and instrumentalities for use at the telephones and phonogra hs which will require very slight, if any, changes in the central ofllce equipment. Line and cord circuits are shown in Patent Number 2,332,359 heretofore mentioned.

In Figure 1 the numeral Ill denotes within the dotted lines a conventional telephone instrument having a signal device such as ringer S, a condenser C, receiver R, transmitter T, hook switch H, and induction coil I. The hook switch H is moved from normal open circuit position to closed circuit position by an arm ll shown diagrammatically in the figure as operated by a cam l2,

driven by the phonogra h motor is, which also operates the record table l4, carrying record i5, which when contacting reproducer It, produces sound which issuing from II, impinges upon the adjacent transmitter T, and is transmitted over line Ll, L2, in the usual manner. Thus the phonograph is 'operatively connected to the circuit Ll, L2.

The phonograph motorgenerally denoted by the numeral l3 isof any desired type, and as shown diagrammatically drives the record table l4 at any desired speed. The shaft of this motor makes a predetermined number of revolutions during which cam l2 operates arm II, the cam being geared or otherwise suitably driven. -As the details of construction of such devices are well known, they are not herein shown in detail, and in the Figures 2, 3 and 4. the motor, turntable,

' record, reproducer and other parts, as shown in Figure 1, are diagrammatically shown at. I3 as a motor winding only, for the sakeof simplicity.

The foregoing briefly describes an acoustically coupled telephone-phonograph combination as more fully described in copending application before mentioned, and such a combination can be used with any of the circuits herein described. Should it be desired to use an electric phonograph, then the circuits of same are shown in Patent Number 2,332,359 hereinbeiore mentioned, and such electric phonographs may be used with any of the circuits shown herein. 7

Adverting to Figure 1, the numeral l1 denotes the means for connecting the phonograph and its motor to the line circuit Ll, L2. This may be a. suitable relay responsive, to ordinary ringing current, or it may comprise contacts on the ringer S of the telephone instrument as shown in the Patent Number 2,332,359 aforesaid, or mechanism moved by the ringer armature as shown in the application aforesaid. It is sumcient to state here that the means I! is responsive to alternating current, the condenser 18 in series therewith making it opaque to direct current.

An operator impressing ringing current on line Ll, L2 willoperate themeans II, which closes contacts i9, as long as energized. This establishes a path for current from line Ll via conductor 20, through the winding of motor I3, via conductor 2|, through contacts is, through manual switch 22 to L2. This will cause a slight operation of the motor l2.

- The operator rings several times on the line, or

if the machine ringing is used, the means ll will be operated a number of tlmes say four, for a period of say one and one-half seconds on and one and one-half seconds "off" each time.

Each time the device ll operate it closes a circuit through motor l3, and each operation of the motor I2 moves cam l2 driven thereby until arm ll, resting on this cam, is raised sufliciently to close contact 28 to complete a circuit around contacts l9, so that the motor l3 will'now operate continuously throughout its cycleoperating on the current flowing over line Ll, L2 from the central ofllce battery until cam I2 drops arm II to open contact 23, whereupon the motor stops. As soon-as contact 23 is closed thereby connecting motor l2 across the line Ll, L2, the supervisory signal in the operator's cord is extinguished in the usual manner; this is also brought about by the operation of arm ll connecting the telephone to the line, which telephone is also disconnected when arm I I is in the non-operating or "at rest" position shown in the figure.

From the foregoing it will be seen' that the operations performed by the operator, when calling on a telephone line equipped with a phonograph, do not differ in any way than when calling on a line not so equipped, and that the phonograph instrument at the subscribers station is entirely the contact 23 has closed, the operator cannot sto the phonograph, which must then complete its cycle, the record i5 being revolved suillciently to deliver the desired message while cam I2 makes one revolution.

Should it be desired to have the operator stop as well as start the phonograph-often desirable when recording-the arrangement shown in Figure 2 may be used, and the control means 24 is any suitable form of step-by-step or off and "on" relay which, on receiving an impulse of current, will close contacts 25, and on th next impulse, will open them. Here assuming the switch 22 to be closed, upon the operator ringing on line L, L, the device 24 will close its contacts 25, thereby establishing a circuit from Ll via. conductor 20 through winding 13 of the phonograph motor. through contacts" 25 and contacts 25 via conductor 21 and switch 22 to L2. This starts the phonograph which continues to run until the operator again rings on the line L, L, and operates the device 24 to move its contacts 25 to open or off position.

Should the record l5 become exhausted so that the recorder or reproducer arm 28 must be reset, the contacts 25 are broken when the arm reaches the end of the record and the phonograph is thereby stopped and will remain inoperative until arm 28 is reset. As soon as it is moved, if the device 24 is in the on position, the motor l3 will begin'to operate, but the subscriber can prevent this by manually resetting the device 24 by pressing the usual reset button 29. As the construction of such step-by-step relays are well known, the device 24 is not here described in detail.

The operation of the telephone instrument in connection with Figure 2 is the same as'with Fi ure 1, except the arm Ila in'steadof being operated like the arm ll, Figure 1, by a cam on the phonograph motor, may be operated by a magnet 30 which is always energized when the phonegraph is in operation. Thus with the arrangement shown in Figure 2, the operator can start and stop the phonograph, the motor of which is operated by current flowing over the line Ll, L2.

The circuit, Figure 2, obviously cannot be used with machine ringing, for successive applications of ringingcurrent would cause the device 24 to alternately open and close its contacts, but may in use.

- ringing. Here'the relay 3| has a winding ila in series with condenser il across the line Li, L2, and a locking winding, iib also across'the line in series with the motor ll, the normally Open contacts 32 and the lower contact 33 of the cam arm I I. When the operator rings on the line (switch 22 being closed), relay Ii closes contacts 32 and the line current flows through the motor i3, winding lib and the lower contact II. holding the relay contacts 32 closed. This starts the motor, revolving cam i2 and raising arm II from contact 33 which opens the circuit through winding lib of relay 3| which releases its contacts 32-. As 33 breaks contact with arm' ii, the latter closes contact 34 which maintains the circuit from Ll to L2 through the motor windings it, and the motor continues to operate until cam i2 moves arm ii to open contact 34 The operation of the telephone hook switch H,

is as previously described in connection with Fi ure 1.

In Figure 4 is shown a circuit embodying a time-delay relay of any suitable type which closes immediately upon application of current thereto, but remains closed whether further energized or not for some predetermined time-say thirty seconds during which time the phonograph may either deliver or record a message.

In this figure the relay 35 has an armature or moving member 36 attached to a dash-pot or other 'known' timedelay device ll. As many such relays are known; the showing here is diagrammatic. This relay will, when energizedby the operator ringing on the line, close contact 38 thereby establishing a circuit through the motor winding l3 and supplying same with current from lines Li, L2. I

The telephone hook switch II is operated as previously described in connection with Flgure 1.

The circuits previously described show apparatus for use on ordinary common battery telephone lines where the usual common battery voltages and amperage is available at the telephone for operating the phonograph motors it, which only operate when the phonographs are actually As the phonograph-motors are connected to the talking circuits while the latter are in use, some motor noise may occur unless noise suppressors commonly termed fllters" are applied. These may be placediin any of the circuits herein described and are shown in Figured where 39, 40 denote suitable choke coils in the motor circuit which may in addition have the condenser 4| therein as shown. Any other suitable filtering or noise-suppressing means may be employed to prevent the operation of the motor from ailecting the talking circuits.

In some installations it may be desirable to employ a higher voltage to the telephone lines than that usually available in telephone exchanges in order to supply suitable current to the phonograph motors, and this may be accomplished'with a minimum change in the central ofllce equipment by the arrangement shown in Figure 5. Here a switch key 42 is connected as shown so that normally the regular exchange battery 43 is connected to plug 44. when key is operated, it substitutes the higher voltage battery with its attendant-relays etc., for the regular battery 43. The relays or repeating coils associated with battery 45 are suitable Ior use with the voltage of said battery. The supervisory lamp 46 is not switched by'key 42, but when the latter is operated, a resistance 41 is placed in series with the lamp to compensate for the increased voltage. No attempt'is made in Figure 5 to show any detailsoi thecord circuit, operators telephone, etc., as these do not relate to the inventive concept disclosed in. this figure, and their arrangement may be varied within wide limits.

The busy test is preserved on lines in which plugs such as 44 are used, as the resistance 41R preserves the continuity of the sleeve circuit S of the plug through the lamp 46 with relay 46R in any position. Resistance 41 merely protects the lamp 46 from the increased voltage when battery 45is used. Resistance 41R is sufiicient to totally extinguish the lamp 46 while preserving the continuity of the sleeve circuit for busy test purposes.

In the case of magneto exchanges and where the telephones are of the local batterytype, the provision of special cord circuits like Figure 5 with the usual bridged supervisory ring down drop 48 in series with a condenser 49 across the cord will enable any of the circuits Figures 1 to 4 inclusive to be operated. For magneto ex changes the supervisorylam'p' 46,-resistance 41 and the accompanying supervisory relay 46R are not required, the latter being replaced by a proper impedance coil. Also whenthe telephones are for magneto service usinghand generators ,for signalling. theexchange it is well "to provide the generator .50 vwith a pushbuttonilQFigure the generator being connectedbetween Li and the lower contact 52 =o'fthls 'pushbutton so that when signalling central .thesub'scriber will not as commonly used in so-called automatic exchanges.

It will be observed that in all cases the subscriber can signal the exchange operator while. a special cord circuit such as that shownin Figure 5 is in use. In a commonbattery ofllce, if

the subscriber raises and lowers the hook switch H on the telephone, the supervisory signal lamp 46 will flash. In a magneto omce, the subscriber operates the magneto generator 50, Figure 4, while pressing the button 5i, and thereby operates the signal 48 in the cord circuit. The key 42 may be equipped with a pilot light 53 which is on when,the key is thrown and off when it is restored to normal. I

While telephone apparatus is shown in Figures 1 to 5 inclusive, it will be understood that other 1 communication apparatus such as telegraph or facsimile apparatus can be used, the inventive concept being broadly the use of the line circuit for at least two purposes; to wit, as a communication channel and simultaneously therewith supplying via the same channel, the operating current for the phonograph instrument. At times the channel is also used to control the operation of the phonograph; i. e., to connect and slight modifications in the disconnect it from the line circuit. Changes in the instrumentalities such as relays, condensers, etc., necessary when other than telephone apparatus is used are well understood and are therefore not described herein.

In some systems it may be desirable to operate the phonographs by a -mechanical motor such as the .usual spring motor often used with portable phonographs. I

Referringto Figure 6, a mechanical motor, for example a spring motor-is diagrammatically shown at 54, As the construction of such motors is well known, it is not shown in detail. Such motors have a'control mechanism for starting and stopping the motor, such as the lever 55 normally held in the stop position by spring 58. The motor may have a winding key (not shown) whereby it maybe wound by hand in the sary in open position by the spring 52. Armature 6| engages and moves the lever 55 to the on" position whichgpermits the motor 54 to operate and shaft 68 revolved thereby operates any suitable mechanism such as the gear train 54 to cause cam 65 to release arm 86 to engage contact 81 thereby completing a circuit through battery 58 and winding 89 on relay 5], the armature 6| of which holds the control lever 55 in position while the motor 54' continues to operate the desired length of time determined by the revolutio of cam 65.

When cam 5 opens the locking circuit at 81, the armature 6| is released and the control lever 55 released thereby moves to the "oil" position and the motor stops. While the motor is at rest, contact 61 is open.

While the motor 54 is in operation, it rotates shaft I8 of the record table I4 as shown in F18- ure 1 and the phonograph operates as previously described, being operatively connected to the line circuit Ll, L2, as the hook switch H of the telephone is permitted to move to closed circuit position by the upward movement of the cam arm 86, which operates in this respect same as the cam arm ll of Figure 1.

When the subscriber uses the hand generator 80, push button 59 may be pressed to open contact 58 and close contact II so that the relay 5'! is disabled and will not operate to place the phonograph in service on outgoing calls. If the contacts 58, 59 and 'II are in the hand generator shunt, then the mere act of turning the generator crank will be suilicient and the telephone can be used without the phonograph.

On party lines the control means such as relay 51 may be a Gill selector, or any type of selector relay responsive to code or other impulses, such for example as the relay shown in the copending application Serial Number 456,157, flied on August 26th, 1941, so that the phonograph will respond only when the particular telephone where it is located is called,

Figure 6 shows a magneto telephone and line. If the line is connected to a common battery exchange, the telephone circuits will be modified accordingly, battery 58 may be omitted and the conductors 12, I3 connected to LI and L2 respectively. Of course the hand generator 88 and pushbutton- 59 are omitted as unnecessary, and condenser C and ringer S are connected in series across the line LI, L2, conductor I4 then being connected to LI Y The foregoing descriptlon ot Figure 6 presupposes that the phonograph motor 54 is hand wound. If the subscriber fails to wind it periodicalLv. the phonograph will not operate, and it is desirable to have the winding or the phonograph under the control of the central oilice operator where it can be attended to as a matter of operating routinesay between 2:00 and 3:00 a. m., or at such other time as the telephone line is not liable to be in use. This may be accomplished by the additional equipment now to be described in connection with Figure 6 wherein at I5 is shown an electric motor connected by suitable gearing indicated at I5 with the winding wheel II oi the spring motor 54 having the release pawl Il which releases the wheel 'I'I when the spring of the motor 54 is sufliciently wound. Such electric-spring combinations are in common use on home phonographs. By applying current to motor I5 it will win the spring in 54, and may be so designed as to require a very small current for its operation. It may be designed to operate for a period of fortyfiv minutes to wind the spring in 54 sufilciently to permit the phonograph to deliver or record sufllcient messages so that it need not be wound but once in 24 hours, and as this winding is done when the telephone or phonograph is not in use, there is no danger of motor-noise interfering with the transmission over line LI, L2.

Themotor I5 is connected across lines Ll, L2,

' in series. with contacts I8 of a relay 8!! having a winding 8| in series with a condenser 82, contacts 58, 59 and lines Ll, L2 as shown. To operate motor I5, the operator rings on line LI, L2 in the usual manner, using some other frequency than is used to operate ringer S. For example, if 16 cycle current is used for the ringer S, the relay 88 may be operated by 66 cycle current. This obviates starting the phonographwhen operating motor I5.

When relay 88 closes its contacts. a holding or looking circuit is established for direct current from Ll over conductor 82 to the cam arm '83, contact 84 locking winding 85 and contact 86 to L2. This holds relay 88 closed until cam 81 operates to open contact 84. Cam 8! is connected to the gearing I6 inany suitable manner and forms a second control device, so that when it operates, the holding circuit remains closed long enough for motor I5, which is operating the while, to fully wind the spring of motor 54. The pawl I8 permits the motor 15 to overrun should the spring be partially wound when the motor I5 starts. The motors 54 and I5 together form a "motor means" for operating the phonograph.

When relay is released, it opens the circuit through motor I5 as well as through its own hold- Relay 51 may then be operated by 33 cycle current and 80 by 66 cycle current. By this means the operator has independent control of the teleindicate when the winding operation is com- Plated. This is shown in Figure 7 where 88 is a suitable source of current for the motor'15, and W is a supervisory relay controlling the pilot lamp which is illuminated as long as the plugdl is connected to a line and a motor 15 is in operation thereon. p

The subscriber can signal the central ofllce when the cord circuit, Figure 1, is in use, This may be accomplished by providing relay 88 with an armature 92 which will not close when armature 98 closes, but will only close when the subscriber removes his receiver R from the hook H, thereby increasing the current flowing through relay 89. Lamp 04 will then be illuminated and by moving the hook up and down, the subscriber can attract the attention of the operator..

Another method whereby the subscriber can signal the operator is to operate the pushbutton 59, Figure 6, thereby opening the circuit through the motor 10 and flashing lamp 90 to attract the operators attention. Thus the motors 15 can be wound without making itimpossible for the subscriber to get the operator the while.

Figure 8 illustrates an arrangement whereby when the springwound motor 54 requires rewinding it will automatically connect the electric m0". tor 10 to the line, wind itself and restore the circuits tonormal. This is accomplished by mounting a contact devicesuch as the cam 01 to be driven by the gear train 63 on motor 54 in such a manner that the cam will make one revolution with one winding of the spring of motor 54. When the motor spring is about exhausted; that of cam 01 operates the contact 09 bridged across the contacts 05 of relay 80. This causes relay 80 to close its contacts thereby starting motor 15 as described in connection with Figure 6. Lobe 00 may pass by the contacts but as relay 80 looks in, the motor 15 will operate until cam 81 driven by the winding gear train 10 (shown in Figure 6 and indicated by dotted lines, Figure 8) operates to break the normally closed contact 84 thereby releasing the relay 80 by opening .the circuit through locking winding 85 thereof, thereby opening the motor circuit at 19. The phonograph impressed on the line by the interrupter I00 in series with devices such as the centrifugally operated switches Ill and I02, and a resistance impedance or repeating coil winding I03. The operator therefore knows when listening on the line,

If it should'be supervisory lamp will light and the operator may take down the plug.

' The tone-signal will not be heard on the lineshould the phonograph operate as the circuit is opened at I02 when the phonograph shaft E3 is rotating. The circuit is open at Nil when the motor 15 is not operating, so when the operator 7 rings on the line, operating relay 51 and the phonograph as previously described in connection with Figure 6, the tone circuit is inoperative.

Figure 8 is in all respects not specifically described, same as Figure 6. If used on magneto lines, some local source of current must be avail able if the automatic'self-winding feature :Iust

described is desired. This may be a connection to the local lightingcircuit or a suitable battery.

connected at I04, I05, the wires 82 and L2--I being cut as shown at x. .In the event this is done, the tone circuit may be completed to LI, L2 inductively by winding I00 on the same core as the tone signal winding I03 and therefore coupled thereto. ".he condenser I01 makes this circuit opaque to direct current.

The details of construction of the phonograph instrument per se are not described, as it is obvious that the phonographcan be used .for recording or reproducing or both; that is to say, if equipped with a talk-out record it will first deliver a message before recording one. Such a phonograph instrument'is described in detail in Patent Number 2,261,420 dated November 4, 1941,

' and as the instant application is limited to the .is to say, when it should be rewound, the lobe 0B circuits and instrumentalities necessary to control the phonograph, the construction of the latter is not described in detail. e I

Therefore the phonograph may be termed a "sound'device and is so referred to in some of the appended claims, this term defining a phono: graph that will record or reproduce or both.

Also in the claims, the telephone instrument of any character may be referred to as a sub set" Also, it will be obvious, as shown in Figure 9, that without departing from the spirit of the invention herein disclosed, the phonograph mechanism may be completely divorced from the telephone sub-set or other transmitting device.

In Figure 9, by way of illustrating a transmitting device associated directly with thephonograph, the numeral I08 denotes ,a complete subset of any suitable type such as shown at I0, Figure 1. -The phonograph equipment is the same as shown in Figure 1, except that the arm I I operates a switch I09 instead of operating the switch hook H of the sub-set. This places a transmitting device such as the transmitter I I0 across the line Ll, L2, instead of the transmitter T, Figure 1. .In all other respects the operation of the ap-" paratus, Figure 10, is the same as that shown in the preceding figures.

Should the circuit LI, L2 be a magneto line, the transmitter H0 would be provided with a local battery and connected to the line via an inthat a honograph is being wound, and may duction coil in the usual mannen'as shown diagrammatically between the dotted lines III.

The device between the dotted lines II2 may therefore form a unit adapted to be connected to a line circuit and operated independently of any other device such as the telephone I00 connected thereto, and in accordance with the circuit arrangement shown in any of the preceding figures.

What is claimed is: 1. A communication circuit, a telephone transmitter connected thereto, a phonograph including an electric motor, means operable over said circuit for connecting said phonograph and motor thereto and a source of current connected to said circuit for continuously operating said moor while same is connected to said circuit.

2. A communication circuit, a telephone transmitter connected thereto, a phonograph including an electric motor, means operable over said circuit for connecting said phonograph and motor thereto and a source of current connected to said circuit for continuously operating said motor and said transmitter while same are respectively connected to said circuit.

3. A communication circuit, a telephone transmitter connected thereto, a phonograph including an electric motor, means operable over said circuit for connecting said phonograph and motor thereto, a source of current connected to said circuit for continuously operating said motor while same is connected to said circuit, and means controlled by a predetermined number of revolutions of said motor for disconnecting same from said circuit.

4. A communication circuit, a telephone transmitter connected thereto, a phonograph including an electric motor and having a record and translating means therefor, means operable over said circuit for connecting said phonograph and said motor thereto, a source of current connected to said circuit for continuously operating said motor while same is connected to said circuit, and means 6. A communication circuit, a telephone trans-' mitter connected thereto, a phonograph includ ing a motor, means responsive to alternating current flowing in said circuit including a relay having a winding connected thereto, a second winding on said relay, a normally open contact adapted to be actuated by the operation of said relay and in series with said second winding, 8. phonograph having a motor winding in series with said second winding on said relay and said circuit, switching means operated by said motor for opening the circuit through said second winding of said relay and re-establishing said circuit .to place said motor winding directly across said cir- .cuit, said means being operable by a predeter-' mined number of revolutions of said motor for opening said last re-established circuit.

'7. A communication circuit, a telephone trans- -mitter connected thereto a phonograph including an electric motor, means operable over said circuit for connecting said phonograph and motor thereto and a source of current connected to said circuit for continuously operating said motor while same is connected to said circuit, said means including a time delay device whereby the length or time said phonograph and motor are in operation is predetermined.

- 8. A communication circuit, a telephone transmitter connected thereto, a phonograph including a motor, means operable over said circuit for connecting said phonograph and motor thereto, a source of current connected to said circuit for operating said motor, and filter means connected said communication circuit and under control or said cord circuit for connecting said motor to said communication circuit and means for operating said motor including a source or current supplied to said communication circuit via said cord circuit.

10. The combnation as claimed in claim 9 wherein said first means includes a device responsive to alternating current supplied via said cord circuit.

11..I'he combination as claimed in claim 9 wherein the application or said source or current also supplies a communication device connected to said communication circuit.

12. In a communication system having a common battery for supplying communication instruments with operating current, connecting cord circuits, lines having communication devices. connected thereto and adapted to be connected by said cord circuits, phonographs having motors, means associated with said phono graphs whereby current applied thereto via said cord circuits and lines will connect said motors to said lines, and switching means in said cord 4 circuits for connecting a second common battery to said lines to supply the motors connected thereto with operating current.

13. In a communication system having a central oflice switchboard including a connecting cord circuit, aline having a communication instrument connected thereto and adapted to be connected to said cord circuit,- a phonograph having a motor, means associated with said phonog'raph whereby current applied thereto via said cord circuit andline will connect said motor to said line, and means for supplying current to said cord circuit for operating said motor.

14. The combination as claimed in claim 13 wherein said last means includes the winding of a supervisory'device connected to the cord circuit.

15. The combination as claimed in claim 13 wherein said last means includes a switching device having a supervisory pilot signal operated thereby to indicate when said cord circuit is connected to supply current to said motors.

16. A communication circuit, a sound device including a mechanical motor, control means connected to and operable by current flowing in .said circuit for starting and stopping said motor, and means operated by said motor to cause said control means to stop said motor after a predetermined number or revolutions thereof.

17. A communication circuit, a sound device including a spring motor, control means including an electrical device having a winding connected to said circuit and adapted to be energized by current flowing therein, a second winding-on said electrical device serially included in a circuit including a source or current and a normally'closed contact adapted to be opened by the operation of said motor, and means controlled by said electrical device for starting and stopping said motor.

18. A communication circuit, a sound'device including a spring motor, control means including an electrical device having a winding connected to said circuit and adapted to be ener-. gized by current flowing therein, a second winding on said electrical device serially included in a circuit including a source of current and 9. normally closed contact adapted tobe opened by the operation of said motor, means controlled by said gized by current flowing therein, a second winding on said electrical device serially included in a circuit including a source of current and a normally closed contact adapted to be opened by the operation of said motor, means controlled by said electrical device for starting and stopping said motor, a transmitting apparatus adapted to be connected and disconnected from said communications circuit by the operation of said motor, a signal device connected to said communications circuit, and means connectable to said circuit for separately operating said control means and said signal device.

- 20. A communication circuit, transmitting ap paratus connected thereto including switching mechanism whereby the transmitting apparatus may be connected to said circuit, a sound device including a mechanical motor, means operated by said motor for operating said switching mechanism, a control device connected to said circuit and arranged to cause said motor to operate said sound device, means controlled by the operation of said motor for actuating said control device to stop said motor in timed relation to the operation of said first means, means operable to send a signalling current out over said circuit, and

switching. means associated with said, last means for preventing current therefrom from operating said control device. I

21. A circuit, a phonograph including a spring p motor, means operable over said circuit for'connecting said phonograph thereto, an electric motor connected to said spring motor to wind the spring thereof, and control means for operating said electric motor by current supplied thereto over said'circuit.

*22. The combination as claimed in claim 21 v wherein said control means includes a relay connected to said circuit and operable by current flowing therein.

23. The combination as claimed in claim 21 wherein said control means includes a relay operable'by current flowing in said circuit and having a locking winding operable by another current flowing in said circuit, contacts in circuit with said winding, and a second controldevice connected to said locking winding and operated by said electric motor.

24, A circuit, a sound device including a spring motor, meansfor operatively connecting saidv device to said circuit, an electric'mot'or connected to said spring motor to wind the spring thereof, control means for connecting said electric motor to said circuit to be operated by current flowing therein, said means including a relay operable by current flowing in-said circuit, a locking circuit including a winding and contacts on said relay, and a second control means connected to said looking circuit for disconnecting saidelectr'ic motor. and operated thereby.

25. A circuit, a sound device including a spring motor, means for operatively connecting said device to said circuit, an electric motor connected to said spring motor to wind the spring thereof,

gearing between said motors including an overrun device, control means for connecting said electric motor to said circuit to be operated by current flowing therein, and a second control means for disconnecting said electric motor operated thereby. w

26. A circuit, a sound device including a spring motor, means for operatively connecting said dovice to said circuit, an electric motor connected to said spring motor to wind the spring thereof, gearing between said motors including an overrun device, control means for connecting said electric motor to said circuit to be operated by current flowing therein, and a second control means operated in timed relation to said electric motor for dis-connecting same from said circuit.

27. A circuit, a sound device including a spring I motor, means for operatively connecting said device to said circuit, an electric motor connected to said spring motor to wind the spring thereof, gearing between said motors including an overrun device, control .means for connecting said electric motor to said circuit to be operated by current flowing therein, said means including a relay having a winding connected to said circult, a holding circuit for said relay including a winding thereon and a contact controlled by said relay, and meanscontrolled by said electric mo-.

tor for disabling said holding circuit to release said relay and thereby disconnect said electric motor from said first circuit.

- 28. In combination, line circuits each havingv a transmitting apparatus and an associated phonograph, said line circuits terminating in a central oflice, motor means at said phonographs for operating same; means located at said phonographs and controllable from said central oflice for operatively connecting said phonographs to said line circuits, means including switching instrumentalities applicable to any line circuit in said central ofllce for operating said first means, and means partly at said phonographs and partly at said central office for supplying current to the motor means at said phonographs from a source of current located at the central ofllce.

29. In combination, line circuits each having a transmitting apparatus and an associated phonograph, said line circuits terminating in a central office, motor means for operating each phonograph, means at each of said phonographs and controllable over the line circuit associated therewith for operatively connecting said phonograph to said line circuit, means at said central oflice applicable to anyline circuit therein for operating said flrst means, a. source of current at said central ofllce, and means at said central oflice applicable to any line circuit therein for supplying said current thereto and to the motor means connected in circuit therewith.

30. In combination, line circuits each having a' transmitting apparatus and an associated phonograph, saidline circuits terminating in a central oilice, motor means for operating each phonograph, means at each'of said phonographs and controllable over the line circuit associated therewith for operativelyconnecting said phonograph to said linecircuit, means at said central oiflce applicableto any line circuit therein for operat-- ing said first means, a source of current at said cable to any line circuit therein for supplying a said current thereto and to the motor means connected in circuit therewith, and-means operated by a predetermined number of revolutions of a part of said motor means for disconnecting said phonograph from its associated line circuit.

with for operatively connecting said phonograph to said line circuit, means at said central oflice applicable to' any line circuit therein for operating said first means, a source of current at said central oflice, means at said central omce applicable to any line circuit therein for supplying said current thereto and to the motor means connected in circuit therewith, and'means operated by a predetermined number ofrevolutions of a part of said motor means for disconnecting said motor means from its associated line circuit.

32. In combination, line circuits each having a transmitting apparatus and an associated phonograph, said line circuits terminating in a central omce, motor means for operating each phonograph, meansat each of said phonographs and controllable over the line circuit associated therewith for operatively connecting said phonograph to said line circuit, means at said central ofllce applicable to any line circuit therein for operating said first means, a source of current at said central oiiice, means at said central oflice applicable to any line circuit therein for supplying said current thereto and to the motor means connected in circuit therewith, means operated by a predetermined number of revolutions of a part of said motor means for disconnecting said phonograph from its associated line circuit, and means operated by a predetermined number of revolutions of a part of said motor means for disconnecting said motor means from its associated line circuit.

33. In combination, a line circuit, a transmitting device, a phonograph having a spring motor, means connected to said line circuit and operable by current flowing therein for releasing said spring motor to drive said phonograph, means operated by said spring motor for connecting said transmitting device to said line circuit, an electric motor connected to said spring motor to wind the spring thereof, and means controlled by said spring motor for connecting said electric motor to said line circuit to be operated by current flowing therein.

34. In combination, a line circuit, a transmitting device, a. phonograph having a spring motor, means connected to said line circuit and operable by current flowing therein for releasing said spring motor to drive said phonograph, means operated by said spring motor for connecting said transmitting device to said line circuits, an electric motor connected to said spring motor to wind the spring thereof, means controlled by said spring motor for connecting said electric motor to said line circuit to be operated by current flowing therein, and means controlled by said electric motor for disconnecting same from said line circuit.

35. In combination, a line circuit, a transmitting device, a phonograph having a spring motor, means connected to said line circuit and operable by current flowing therein for releasing said 2,896,961 central oflfice,'means at said central oflice applispring motor to drive said phonograph, means operated by said spring motor for connecting said transmitting device to said line circuit, an electric motor connected to said spring motor to wind the spring thereof, and meansconnected to said line circuit and operable by current flowing thereover for connecting said electric motor to said line circuit whereby said motor is operated by current flowing over said circuit.

36. In combination, a line circuit, a transmitting device, a phonograph having a spring motor, means connected to said line circuit and operable by current flowing therein for releasing said spring motor to drive said phonograph, means operated by said spring motor for connecting said transmitting device to said line circuit, an electric motor connected to said spring motor to wind the spring thereof, means connected to said line circuit and operable by current flowing thereover for I connecting said electric motor to said line circuit whereby said motor is operated by current flowing over said circuit, and means controlled by the operation of said electric motor for disconnecting same from said line circuit.

37. The combination as claimed in claim 36 wherein the means controlled by the operation of the electric motor for disconnecting same from the line circuit includes a relay having a locking winding in circuit with contacts operated by the movement of the electric motor, said relay having a contact controlling the line circuit through the motor. l

38. The combination as claimed in claim 36 wherein the means controlled by the operation'oi the electric motor for disconnecting same from the line circuit includes a relay having a locking winding in circuit with contacts operated by the movement of the electric motor, said relay having a contact controlling the line circuit through the motor, and said rela having a winding connected to said line circuit whereby said 'relay may be operated by current applied thereto via said line circuit.

39. In combination, a line circuit, a transmitting device, a phonograph having a spring motor, means connected to said line circuit and operable by current flowing therein for starting said motor and connecting said transmitting'device to'said line circuit, an electric motor connected to said spring motor to wind the spring thereof, and means operable when said spring motor is at rest and said electric motor i in operation forming a tone circuit for impressing a signal-tone on said line circuit.

40. The combination as claimed in claim 39 wherein said last means includes switches operated by said motors.

41. In combination, a line circuit, a transmit ting device, a phonograph havin a spring motor, means connected to said line circuit and operable by current flowing therein for starting said motor and connecting said transmitting device to said line circuit, an electric motor connected to said spring motor to wind the spring thereof, and means operable when said spring motor is at rest and said electric motor is in operation forming a tone circuit for impressing a signal-tone on said line circuit, said last means including centrifugal switches operated by said motors.

42. The combination as claimed in claim 39 wherein said last means include switches operated by said motors and serially included in said tone circuit with an interrupter driven by said electric motor, said tone circuit being coupled to aseaoei said line circuit to impress a signal-tone thereon while said electric motoris in operation.

43. The combination as claimed in claim 39 including means for rendering laid tone circuit inoperative when said electric motor has wound the spring of said spring motor to a predetermined tension. 3

44. In combination, a line circuit, a transmitting device, a phonograph havin a spring motor. means connected to said line circuit and op rable by current flowing therein for starting said motor and connecting said transmitting device to said line circuit, an electric motor connected to said spring motor to wind the sprin thereof, means connected to said line circuit for starting said,

electric motor, and means for impressing a signal tone on said line circuit while said electric motor is operating. 1

45. In combination, a line circuit, a transmitting. device, a phonograph having a spring motor, means connected to said line circuit and operable by currentflowins therein for starting said motor and connecting said transmitting device to. said line circuit, an electric motor connected to said spring motor to wind the spring thereof, means connected to said line circuit for starting said electric motor, means for impressing a signal tone on said line circuit while said electric motor is operating, and means controlled by said spring motor for disconnecting said signal tone from said line circuit while said spring motor is in operation.

46. In combination, a line circuit, a graph having a spring motor, an electric motor connected to said spring motor to wind the spring thereof, a source or current for operating s id electric motor, means controlled by said sprin motor for connecting said-electric motor to said source or current, and means controlled by said electric motor for disconnecting same from said source or current.

47. In combination, a line circuit, a. phonograph having a, spring motor, an electric motor connected to said spring motor to wind the spring thereof, a source of current for operating said electric motor, means controlled by said spring phonomotor for connecting said electric motor to said source 0! current, means connected to and operable by current in said line circuit for connecting said electric motor to said source of current, and means controlled by said electric motor ior disconnecting sam from said source of current.

48. In combination, a line circuit, a. phonograph having a sprin motor. an electric motor connected to said spring motor to wind the spring thereof, a source of current tor operating said electric motor, means controlled by said spring motor for connecting said electric motor to said source of current, means connected to and operable by current in said line circuit for connecting said electric motor to said source oi! current including a relay having a winding connected to-said, line circuit and a lockin winding in a locking circuit connected to said source of current, and means controlled by said electric motor ior opening said relay and disconnecting said electric motor from said current source.

HARRY R. VAN DEVENTER.

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