US528075A - The morris pctehs co - Google Patents

Description

(No Model.)

H. A. CHASE COMBINBD'TELBPHONIGAND SIGNA'LING SYSTEM m: dams brins co., Nm-ouwe.. WASHING-ron1 n. c,

UNTTED STATES PATENT @FFME- HENRY A. OHASE, OE BOSTON, MASSACHUSETTS, ASSIGNOR To ALBERT wATTs, OE SAME PLACE.

COMBINED TELEPHONIO AND SIGNAL'ING SYSTEM.

SPECIFICATION forming part of Letters Patent No. 528,075, dated October 23, 1894. Application tiled June 25, 1894.l Serial No. 515,588. (No model.)

To all whom t mrty'corwen:

Be it known that I, HENRY A. CHASE, residing in Boston, in the county of Suffolk and- State of Massachusetts, have invented an Improvement in a Combined Telephonie and Signaling System, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

f This invention relates to a combination telephone and signaling system, and has for its object to provide an efcient and less expensive system, in which the use of extra batteries for the telephone and ground taps or connections through condensers, such as now commonly employed in signaling systems employing the telephone as an auxiliary, may be dispensed with, thereby avoiding disturbances from earth currents and obtaining a superior telephonic service in connection with a signaling system. This result is achieved by the employment of a telephone transmitter of that class known as the carbon transmitter, which, in accordance with this invention, is connected in a branch or shunt circuit around the signal transmitting apparatus, and by means of a circuit controller in the main line, which, when opened, brings the shunt circuit into effective operation,'to place the telephonie apparatus in speaking connection with a telephonie apparatus at a distant point or station. The circuit controller governing the main line may and preferably will be employed as a support for the telephone receiver. In the present instance, I have represented the telephonie apparatus as used in conjunction with a signaling system comprising a `substation and a main station, the substation being represented as provided with a signal transmitting apparatus comprising two break wheels, one to indicate the number of the box or substation and the other to indicate the telephone signal for said box or substation, the main station comprising a relay and a local circuit controlled by said relay and including a register magnet and a bell magnet. The signaling system may be employed for any desired or required purpose, such for instance, as fire, police, messenger service, &c., and to facilitate description, I will hereinafter refer to the signaling system as a police signaling system.

Figure l is a diagram of circuits representing a combinedtelephone and signaling system embodying this invention, thesystem being shown in condition for communication by telephone, and Fig. 2, a like diagram of circuits showing the combined system in its normalcondition, that is, with the telephone `more snbstations located at distant points and which are `usually signal boxes. In the `present instance, the signaling transmitting apparatus A is shown as comprising two break wheels a afmounted upon a suitable shaft a2, which in practice, is driven by clock work or othersuitable motor mechanism, such as now commonly employed in police and lire alarm signal .boxes and not herein shown.. In the present instance, the break wheela is provided with teeth t3-of suitable number to indicate the box number 36, while the break wheel os is provided with like teeth 01.3 to indicate the box number, and with an additional tooth 0,4 forming two substantially long breaks to indicate a` telephone signal. The break Wheels a and a as herein represented have co-operating with them two contact springs a5 a6 connected by wires a7 as to terminals a am, with which co-operates a switch or lever (1,12 included in the main line circuit wire (L13. The shaft a2 has cooperating with it the contactlspring 0,14 also included in the main line wire als. The main `line Wire als, which may be supposed to `be the positive wire, is connected to the positive pole of the battery B,which in `practice is located in the main station A', andthe negative pole ofthe said battery has connected to it` the other main line wire aw.

In accordance with this invention, the main line wire als has included in it at the signal transmitting apparatus, a circuit controller B', herein shown as a hooked lever b, vwhich may be supposed to be the well-known hooked lever upon which the telephone receiver b is suspended, the said lever forming one member of the switch B and co-operating with a contact or terminal b2forming the other member of thesaid switch. The main line a18 at the receiving station A is provided with a like circuit controller B2 herein shown as comprising a telephone hook if' and a terminal b2, The main line als as herein represented further includes at the receiving station a relay b3, governing a local circuit L, which in the present instance is shown as including the electro-magnet b4 of a register R, a bell operating magnet b5, and a local circuit b, one pole of the battery b" being connected by the wire 197 to a back stop b3 for the armature b9 ofthe relay h3, and the other pole of the battery b being connected by wire bm to the said armature.

In accordance withthis invention, the signaling system thus t'ar described has co-operating with it at the transmitting and receiving stations, telephonic transmitting and receiving apparatus, which are included in the main line circuit under conditions to be hereinafter described, so as to afford speaking communication between the said substation and main station.

The telephonic apparatus at the transmitting station comprises a telephonic receiver or handphone b and a transmitter c, which may and preferably will be substantially.

such as shown and described in United States Patent No. 250,250, dated November 29, 1881, and commonly known as the I'Iunning transmitter.

The transmitter c and the handphone b are included in a branch or shunt circuit around the signal transmitting apparatus A, one terminal c of the transmitter being connected by wire c2 to the main line cl3 on one side of the transmitting apparatus A, and the other terminal c*c5 of the said transmitter being connected by wire c4 to one terminal c5 of the handphone, the other terminal c( being joined by wire c7 to the main line cl3 on the other side of the transmitting apparatus A and beyond the circuit controller B.

The telephonic apparatus at the receiving station comprises a transmitter c and a hand-l phone b, which are included in a shunt around the circuit controller B2, the terminal c of the' transmitter ca being joined by wire c2 to the wire cl3 on one side of the switch B2, and the terminal c3 being joined by wire c@ to the terminal of"n of the handphone, the other terminal c6 of which is connected by wire c7 to the main line als on the other side of the switch or circuit controller B2.

The transmitters c and ca are commonly made of two terminal plates or diaphragnis with an interposed body ot' comminuted carbon, and when these transmitters are included in a line circuit the resistance ot' the lineis materially increased, so that under normal conditions, the line circuit may be maintained operative for signaling purposes withseems out being interfered with by the said resistance, the presence of which for signaling purposes may be disregarded.

In Fig. 2, the system is represented as in condition for transmittingabox number from the substation A to the receiving station A', which box number will be received and recorded upon the register R. If it is desired by the operator at the substation A to hold telephonic communication with the operator at the main station A', the circuit controller or switch o, at the substation is moved from the terminal a and brought into engagement with the terminal d10, and when in this condition, the signaltransmitting apparatus may be operated to transmit the telephone signal indicated by the break wheel a', which will be received at the main station upon the register, and in the present instance, also upon the bell, which telephone signal in the present instance will comprise the box number and two substantially long dashes, but instead of this particular manner ot identifying the telephone signals, any other suitable or desired character may be employed.

When the operator at the substation has transmitted the signal indicated by the break wheel a', he opens the main line 0,13, which, in the present instance, may be done by simply removing the handphone bfromits hook b, so as to permit the spring d connected to the said hook to withdraw it from contact with its co-operating terminal b2, and the operator at the central or main station, upon the receiptof the telephone signal, also opens the main line at the receiving station, by removing the handphone b' from its hook b, thereby permitting the spring cZto withdraw the said hook from engagement with its terminal bh. The opening of the main line at the transmitting station as just described, throws the shunt circuit including the telephone transmitter c and receiver 1? into active or effective condition, that is, into active circuit relation with the transmitter and receiver ca and ZJ at the central station, which are also included directly. in the line by the opening of the switch B2. When the circuit connection thus described, is established, communication may be held between the station A and substation A and vice versa, and the mainline circuitis at the same time maintained intact for the reception of any signal from any other box or substation connected in the line.

The telephonic circuit may be traced as followsz-from the positive pole of the battery B, by wire als, through the relay b3, thence by the wire cla, handphone bt, wire c4, transmitter ca, wire 02a, main line als, wire c7, handphone b', wire c4, transmitter c, wire c2, to the line a, thence through the movement of the next adjacent box and return wire C05 to the negative pole of the battery B..

In some instances, it may be desirable to reduce the resistance in the main line circuit by short circuiting the relay, which may be IOO ITO

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accomplished by means of a circuit controller,

which may be made after the manner of any graphic key, but which also may be an ordinary push button. The circuit controller consists of the movable member e and the stationar member or terminal e the member e being connected by wire e2 to the main line als on one side of the relay b3, and the terminal e being connected by wire e8 to the` battery B and preferably to only a portion of the battery. IVhen it is desired to cut out the relay b3, the operator at the central station may press upon the member e of the circuit controller so as to bring itin contact with the terminal e', in which case the circuit connection will be made through this manually operated circuit controller instead of through the relay b3.

In ,the combined telephonie and signaling system herein shown, it will be noticed that the telephonie instruments, both transmitter and receiver, are included in the main line to form a part thereof when telephonie communication between stations is desired, and by so doing, a very considerable saving in the cost and maintenance of the combined system is effected, inasmuch as the eXtra batteries now commonly employed in telephonic systems and also the ground taps or earth connections through condensers are dispensed with, so that a superior service is obtained, owing to the fact that disturbances from earth currents are avoided. v In" the present instance, I have represented the hooked levers b and ba as moved in one direction by the springs d and d', but I do not desire to limit my invention in this respect as the said levers may be positively moved by hand to open the main line, and while I prefer to make the telephonie supporting levers b and b as partof the circuit controllers for the main line, I do not desire to limit myself in this respect, as the said main line may be provided with other forms of circuit controllers, and a separate support for the telephonie receivers disconnected from the main line may be employed.

1. In a combined telephonie and signaling system, the combination of the following in-Y strumentalities, vizz-a main line circuit provided With a source of electric supply, a signal transmitting apparatus, and with a signal receiving apparatus included in the main line, a normally closed circuit controller included in the main line at the signal transmitting apparatus, a shunt circuit around the said controller, a second normally closed circuit controller in the main line at the signal receiving apparatus, a shunt circuit around the second circuit controller, a telephonie apparatus comprising a transmitter and a receiver in circuit with each other and included in the shunt circuit at the transmitting station under control of the circuit controller at 'the transmitting station, and both transmitter and receiver being supplied with current from the main line source of supply, a second telephonie apparatus in the shunt circuit at the receiving station under control of the circuit controller at the receiving station, for the purpose specified. y

2. In a combined telephonie and signaling system, the combination of the following instrumentalities, vizz-a main line circuit provided with a source of electric supply, a signal transmitting apparatus, and with a signal receiving apparatus included in the main line, a normally closed circuit controller included in the main line at the signal transmitting apparatus, a shunt circuit around the said controller, a second normally closed circuit. controllerin the main line at the signal receiving apparatus, a shunt circuit around the second circuit controller, a telephonie apparatus comprising a transmitter and a receiver in circuit with each other and included in the shunt circuit at the transmitting station under control of the circuit controller at the transmitting station, and both transmitter and receiverbeing supplied with current from the main line source of supply, and a second telephonie apparatus at the receiving station comprising a transmitter and a receiver incircuit with each other and included in the shunt around the circuit controller at the receiving station, for the purpose specified.

3. In a combined telephonie and signaling system, the combination of the following instrumentalities, vizz-a main line circuit provided with a source of 'electric supply, a signal transmitting apparatus included in the said circuit and comprising a break wheel and a co-operating pen, and a relay at the receiving station, a normally closed circuit controller included in the main line at the signal transmitting apparatus, a shunt circuit around said controller, and asecond normally closed circuit controller in the main line at the signal receiving apparatus, a shunt circuit around the second controller, a telephonic transmitter and receiver in circuit with each other and included in the shunt circuit at the transmitting apparatus, and both transmitter and receiver being supplied with current from the main linesourceof supply, and a telephonie transmitter and receiver at the receiving station in circuit With each other and included in the shunt circuit at tho said receiving station, and both being supplied with current from the main line source of supply, substantially as described.

In testimony whereof I have signed. my name to this specification in the presence of two `subscribing Witnesses.

HENRY A. CHASE.

Witnesses:

JAS. H. CHURCHILL, J MURPHY.

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