US404519A - chase - Google Patents

Description

2 Shets-Sheet 2.

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S. A. CHASE. DUPLEX FIRE TELEGRAPH.

No. 404,519. Patented June 4, 1889.

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ATTORNEYS N4 PETERS. Pllolo-Lllhngraphcr, Washingum DI C.

UNITED STATES PATENT ()FFICE.

SIDNEY A. CHASE, OF EVART, MICHIGAN, ASSIGNOR- OF ONE-HALF TO 'WILLIAM R. MAPES, OF SAME PLACE.

DUPLEX FIRE-TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 404,519, dated June 4, 1889.

App m v filed September 11, 1888- Serial No. 285,114. (No modelil i class of fire and. analogous telegraphic systems of the non-interfering type, and its objects are, first, to provide a system of fire or police telegraphs of duplex type in which the signal is transmitted at the same instant of time by two independent lines or routes to a central or receiving station, or will be transmitted to either of two receivers located at said station in the event of either line breaking; second, to provide means for breakinga normally-closed shunt around the transmitter in the signaling-box, and at the same time connecting said transmitter to either of said lines or routes; and, third, to accomplish various features,which will be hereinafter noted in connection with the description of the system and its mode of operation. I accomplish these objects by the system of circuits and arrangement of parts hereinafter described, and particularly pointed out in the claims which follow this specification.

My invention will be fully understood by referring to the drawings which accompany the specification, and in which Figure l is a diagrammatic view showing the circuit-connections, together with a detail view of the operative parts of one of the signaling-boxes. Fig. 2 is a similar View with a modified form of signal-transmitter; and Fig. 3 is a detail view of the transmitter shown in Fig. 2, showing the several parts detached or separated.

In a prior application for a patent filed by me in the United States Patent Oflice April 9, 1888, hearing Serial No. 270,114, I have shown, described, and claimed an improved system of duplex fire or police telegraphs not substantially different in its general details of circuits and central-station apparatusfrom that shown in the present application, and the generic features of such system are shown and described here only to exemplify the operation of my improvements herein described and claimed.

I make no claim here to the system as a whole, the present application being directed to the specific features hereinafter claimed.

Referring to the drawings, WV W is a main or all-wire circuit connected normally through a shunt around each signal-transmitter in each outlying signal-box, and also to an electro-magnet M in the central or alarm station 0, and through a circuit-closer a .9, held closed by the armature-lever A.

WV IV are normally-open earth-wires connected through two independent receiving-re. lays or signal-receivers, preferably Morse penrecorders, or the same letters WV. W represent in dotted lines in both figures an all-wire,

return-circuit connected to the earth-wires W at each box, said wires being disconnected from earth when the all-wire circuit is used.

B A and B A are the signaling-batteries, located in the normally-open earth-circuits.

1, 2, 3, 4, and 5 are the signal-boxes.

B A is the primary signal. and circuit controlling battery, acting to hold the signal-circuit W IV closed at points 0/. s. r

a a are circuit-controlling springs, and p p are contacts for said springs, said parts beingadapted to contact under the action of armature-lever A on its back action under influence of its spring.

Gr is the primary or preliminary signal-instrument in a normally-open sh unt-circuit W to battery B A, open at p s.

The system as described so far is identical in its construction with that described and claimed in my prior application above referred to, and needs no furthermention here.

In the application referred to the signaltransmitter was so constructed and arranged that the same signal was transmitted first by one route and then the other alternately or successively, while in the present improvement I so arrange the signal-contacts on the two disks D D that the impulses go in both directions simultaneously, thus duplexing the signal on the recorders at the central station, or, in the event of two signals being turned in at the sameinstant, then one will go by one route and the other by the remaining routes, as described in my prior application.

The circuit is closed as follows: From bat tery B A through circuit'elosing springs s a, wire \V, magnet M, wire \V, boxes at 5, in the same manner as in box 1, where the route is by wires \V \V, to eircuit-slnmting springs C C',wires \V \W, out of box, and back through boxes 2 and 3 to the other pole of the battery. This holds armature-lever A up and leaves the shunt and signal-circuits W \Y open. The signal-transmitter, of the usual rotary spring-impelled type, has a handle L and an arm M with insulation atits end, and adapted, when the box is run down, to close the shunt ing-springs O 0, thereby shunting the sign alwheels D I) out of circuit.

A modified form of shnut-controller is shown in box 1, Fig. 2, in which the ordinary pulllever L is of bell-crank pat-tern and has connected to it a pivoted arm M, which in turn is connected to an arm F, carrying an insulating-block. lVhen the arm L is pulled down, the insulated block is thrust under the shunting-sprin U (1, thereby breaking the shunt and permitting the signal to go to the right and left over wire \V, as shown by arrows A A Fig. 3 shows in detail the signal-transmitter composed of three disks I) D D The cen tral disk D is of metal, and contacts continuously with the spring ll, while disks 1) l) have the signal disposed on their surfaces at the same side, and are connected electrically to disk I.) through the .common axle.

An examination of the drawings, Fig. 2, will reveal the circuit-connections,in which disk D transmits to the right and D to the left simultaneously if both wires \V V are intact.

The operation of the form shown in Figs 1 is as follows: On taking hold of handle L and rotating the transmitter in the direction of the arrow the arm M is carried to the left and the shunt through the box about the transmitter is broken. At the same time the magnet M at central station is demagnetized and the signaling-circuits closed from batteries 13 A 3 A through recorders or signal-recei vers R R, as described in my prior application. Signal-disks D l) commence to rotate on releasing handle L, and as the teeth of the transmitter pass beneath springs ll ll the current from batteries B A and B A is either earthed at E E E or sent by diverse routes through wires \V \V, the signal going in at the same time in both directions, or ii. either route be broken then by the one left intact.

The preliminary signal in gong G will. of course be sounded, as described in said prior application.

there be a slight difference in. time between the pulls. In the modified :torm shown in Fig. 2 the operation differs from that already described only in the fact that the contacts arin s C C are disconnected electricall b l s g the insulation on arm F.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-

1. In a system 01: fire-alarm or analogous signals, the combination of a two-way transmitter composed of two signal-disks having a character-signal on each disk. and contactsprings, with a normally-closed circuit shunting the transmitter and including in its circuit a circuit-closer and an electro-magnct located at a signal-reeeivin g station, the circuit-closer being held closed by the armature of the magnet, and one or morenormally-open signal-receiving circuits, including one or more signal-receiving instruments, the contact making and breaking devices representing the characteristic signals being located on the same side of the disks, so that both signals are transn'iitted simultaneously, or so that the signal is sent in by whichever of the two lines ren'lains intact, substantially as described.

2. A signal-transmitter for use in a duplex system of fire or analogous signals, consisting of three disks, two of which have a definite signal on the same side of their periphery, the third having constant metallic contact with an earth-circuit, while the others are connected by individual. contact-springs and normally-open main-line circuits running by diverse routes to a receiving-station, said main lines including receiving-instruments, substantially as described.

3. A signal-transmitter for use in duplex fire or analogous systems of signals, consisting of a mechanically-impelled motor geared to a signal-wheel composed of two signaldisks havingtwo characteristic signals-one on each diskand located between the same radial portions of said disks, in combination with two main-line circuits running by diverse routes to a signal-receivingstation,and a shunt around said transmitter, ineludin g a circuit-breaker normally held closed by an arm connected to the motorshaft, substantially as described.

4. In a duplex fire, police, or analogous sys tem of signals, the combination of the following elements: two reeeiving-instruments located in normally-open earth-circuits at a signal-receivin g station, an independent all-metallic circuit including one or more outlying signal-boxes and an electro-magnet and circuit-closer held closed by the armature of said magnet, a two-way signal-transmitter in each box connected to a normally-open. earthcircuit, and a shunt around said sigi'ial-transmitter held normally closed by a motor which propels the signal-transmitter, the latter having its duplicate signals in the same radial position, so that as it rotates duplicate located in normally-open earth-circuits, sub-.

stantially as described.

6. A signal-transmitter for use in a duplex system of fire, police, or analogous signals, consisting of two disks which have each a definite signal located on the same side of its periphery, having constant electric connection with an earth-circuit, and having open-circuit independent contact-springs, and circuit-connections bran chin g to closed main-line circuits running by diverse routes to a receiving-station, said main line containing receiving-instruments, substantially as described.

7. In a non-interfering fire, police, or analogous signaling system, a duplex signal-transmitter composed of two duplicate signalingdisks each having the same characteristic signal located on the same radial portion of its circumference, in combination with normally-open circuit signaling contact-springs and circuit-connections, an earth-circuit disk having a continually-closed ground-circuit connection, an automatic circuit-changer at the receiving-station, having earth-circuits and normally-open circui t-connections, whereby duplicate signals may be sent simultaneously to the receiving-station in opposite directions at every revolution of the signalingcircuit disks, substantially as described.

8. A signal-transmitter for use in a duplex fire, police, or analogous system of signals, consisting of a mechanically-impelled motor geared to a signal-wheel composed of two signaling-disks having duplicate signals on the same radial portions of their circumferences and continuous electric connection'with an earth-circuit, in combination with independent normally-open circuit signaling contactsprings and circuit-connections connected to opposite sides of a normally-closed shunt-cin cuit closer, connected in a metallic circuit shunting the transmitter, said circuit running to a central station, including an electro-magnet-ic circuit-changer and armature, and contacts and connections which connect independent earth-circuits, including receiVing-instru ments, whereby duplicate signals are transmitted simultaneously, substantially as described.

9. In a duplex fire, police, or analogous signaling system, the combination of the following elements: a main all-wire closed metallic circuit W, normally-open receiving earth-circuits WV, transmitter ground-circuits W with a series of duplex transmitters normally shunted out of the main circuit, but connected continually to earth-circuits, said transmitters composed of duplicate signaling -disks and continuity-preserving disks with definite signals located on the same radial portions of the circumferences of the transmitters, substantially as described.

SIDNEY A. CHASE.

lVit-nessesz E. O. CANNON, BARLow DAVIS.

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