US966824A

US966824A - Electrical signaling system.

Info

Publication number: US966824A
Application number: US54825810A
Authority: US
Inventors: Albert Goldstein
Original assignee: INTERNAT ELECTRIC PROT Co
Current assignee: INTERNATIONAL ELECTRIC PROTECTION Co; INTERNAT ELECTRIC PROT Co
Priority date: 1910-03-09
Filing date: 1910-03-09
Publication date: 1910-08-09
Anticipated expiration: 1927-08-09

Description

A. GOLDSTEIN.

BLEGTRI'GAL SIGNALING SYSTEM. AYPLIOATION FILED 1.13.9, 1910- 966,824. Patented Aug. 9, "1910.

0 6 I L a INVENTOH my M v v I v fi nnonurr WiT/IESSES:

UNITED STATES PATENT diaries,

ALBERT GOLDSTEIN, OF NEW YORK, N. Y., ASSIGNOR T INTERNATIONAL ELECTRIC PROTECTION COMPANY, A CORPORATION OF NEW YORK.

ELECTRICAL SIGNALING SYSTEM. I

Specification of Letters Patent.

Patented Aug. 9, 191th To a-ll whom 'it may concern:

Be it known that I, ALBERT GoLnsTEiN, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented a certain new and useful Improvement in Electrical Signaling Systems, of which the following is a specification.

The invention is acentral energy electrical signaling system, in which successive code signals may continue to be sent from a plurality of transmitters, notwithstanding an abnormal disturbance-such as a break in the eleptrical conditions of the circuit, and in which the transmitters are timed and their operation .rendered successive by electrical means! the said means here co1nprising thermostatic switches heated and so con trolled by the current on the circuit.

In the accompanying drawing Figure 1 is an electrical diagram, showing my invention by conventional symbols. Fig. 2 is a side elevation of one of the thermostatic switches.

Similar numbers and letters of reference indicate like parts.

Located at the receiving station is a source A of current, here shown as a split battery, which is grounded at G. At three distant stations are the transmitters T, T, T the 'line conductor between the stations being shown at- 1 and 25. At the receiving station are the magnets D, E respectively interposed in lineconductors 1, and each controlling a local circuit from battery L to the glow lamps P, Q, so that when either magnet vibrates its switch lever 07 or e to open or' close its local circuit, the signals will be translated by said lamps.

The metallic circuit proceeds as follows: From source A to magnet D, line wire 1, to transmitter T and therein to contact 2, heat switch arm S wire 3, switch n contact l, wire 5, switch 0, contact. 6, wire 7, heat switch arm S contact 8 and thence by wire 9, to transmitter T, and therein to contact 10, heat switcharm S, wire 11, switch a, contact 12, wire 13, switch 0, contact 14-, wire 15, heat switch arm S, contact 16 and thence by wire 17 to transmitter T and therein to contact 18, heat switch arm S wire 19, switch a, contact 20, wire 21, switch 0 contact 22, wire 23, heat switch arm S", contact 24 to fline wire 25, magnet. Eto source A, i

. as before.

with code wheel M, the detent it again 811- gages with said notch. The same result is produced through magnets WV", W of trans mitter T, and through magnets W*, 'W of transmitter T In order that the transmitters T, T, T may send in their signals successively, no matter inwhat order they may be operated, or whether. theybe operated simultaneously or otherwise, the following construction is provided: Magnet W .is ina shunt having terminals at contact point 8, and junction w. Magnet W is in a shunt having terminals at contact point 2, and junction y. Under normal conditions, as already described, contacts 8 and 2 are closed and magnets V and W are short-circuited, and accordingly 'deenergized. The hinged armature to then being retracted, the pallet tail 6 is locked, and the detent h engages in the notch of winding drum 2'. When, however, the lever o is depressed, circuit being opened at point 6 proceeds as follows: from wire 1 to contact 2, heat switch arm S coil on said arm, wire 28, wire 29, contact 30, switch n, con- .tact 31, switch n wire 32, coil of heat switch S heat switch arm 8, contact 8 and wire 9, The coils on heat switch arms S S now become heated by the current, thus producing unequal expansion of the thermostatic arms within them, and causing said arms to bend sufiiciently to open cir' cuit at contacts 2 and 8. rent to pa ss to the magnet shunts, thus energizing magnets W, \V and, causing in the manner already described, the release of code wheel M which, rotating in the usual way, sends signals over the line.

It is to be observed that code wheel .M

This enables cursends impulses by intermittently closing the'i 10 as for example, first, in transmitter T, sec-.

net W to junction 3 coil of heat switch S I contact 14, switch 0, wire 13, contact 12,

wire 28, wire 29, contact 30,, switch 71., contact 31, switch n wire 32, coil of heat switch S junction 02, magnet W to wire 9.

On the shaft of wheelM is a cam N having an insulating ring on its periphery. On this ring the bent over end of switch arm n bears while said wheel and cam are in rotation. In this way the arm a is raised together with arms a, 91 ,713, which are connected to arm n by intermediate bars of insulating material, thus opening circuit at contacts 30, 31 and 1, and closing circuit to ground G at contact 34:. When this is done the code wheel M controls the circuit to ground G, by operating switch arms m, m, connected by a bar of insulating material, to open and close contacts 35. and 36 which, by wire 37, contact 34 and switch it, connect to ground G.

In order to prevent a premature restoring of switch 0 to its original position, closing a. short-circuit by

wires

5 and 7 around the transmitter T, the switch 12. is provided, which-opens contact 4 in series with wire 5. I The construction of transmitters T and T is the same as that of transmitter T, with which they are connected in series in the metallic circuit. The heat switches S S of transmitters T, S S of transmitter T and S S of transmitter T are to be eon-.

structed so that the switch arms in each transmitter will operate at a different time 0nd, in transmitter T and third, in trans-' Initter T -when their coils areheated simultaneously. This maybe accomplished in a variety of known ways, as by proper tioning the resistances of the coils, or the cross sectional area or by selection of materials of the thermostatic elements, or by varying the normal pressures of the contacts-as 2 and 8in the several transmitters against the arms.

Assume now that the transmitter T be operated, the transmitters T, T will not operate, because thelow resistance circuit to ground G is only closed momentarily by switch m, and current then does not pass for along enough period of time to the coils of-the heat switches of transmitters T, T

to operate said switches.

So far I have described the operation of the system on normal circuit. I will now assume that a disturbance occurs in the electrical conditions on the line, say a break. If said break, say at Z, occurs on wire 1, then there will be two leads formed from th source A: namely (1) to magnet D, wire 1 to break; and (2) to ma et E,v

wire 25, contact 24, heat switch arm wire 23, contact 22, switcho wire 21, contact 20, switch it, wire19, heat switch arm S 'contact18, bywire 17 to transmitter T and therein contact 16,; switch arm S, wire 15,

: disturbance of electr switch it, wire 11, heat switch arm S conhand, the break occurs in wire 25, say at Z,

again there will be two leadsformed from source A: namely (1) to magnet D, wire 1 and so through the transmitters T, T, T but in the reverse direction to the second lead above "described, to break Z; and (2) to magnet E, wire 25 to break Z. It will be obvious that in either case, in order to operate any one of the transmitters, a ground must be provided at that transmitter. I will assume that the break is in wire 25- at Z, and that it is desired to, operate transmitter T. The. switch 0 is openedat contact 6, as already described, but because of the break nothing can happen unless a current path to ground is established. This I do by the following means. Connected to switch 0 by a-bar of insulating material is a switch 1 which conmeets with wire 1 by way of wire 45, switch 11/, contact 30, wire 29, wire 28, coil of heat switch, heat switch arm S and contact 2. .In the path of switch p is a contact 47 which connects with ground G" through the coil of heat switch S. Hence when switch 0 opens circuit at contact 6, it closes circuit at 47 and so connects wire 1 with ground.

The coil of heat switch S is made of very high resistance as compared to the coil of heat switch S -say 20,000 ohms to 20 ohms-so that although the two coils are in series,S*- only is heated. When heated, the thermostatic arm inclosed' in said coil establishes contact with point 44 which is connected with the coil of Sf? This short-dry cuits the greater part .of v the resistance offered by said coil, so that the increased current now passing through the coil of S is suflicient to heat the switch arm therein and cause said arm to open the shunt around magnet W at point 2, thus energizing said magnet and setting the code wheel M in operation in the manner already described. The reason for making the coil of heat switch S of very high resistance is to prevent signals sent from the other transmitters from being cut ofi' from the receiving station, as would happen if the ground provided for transmitter .T were of low resistance.

I claim:

1. The combination of a source of current, a metallic circuit, a plurality of transmitters in series therein, a plurality of translating devices controlled by said transmitters, means 'oper d by an abnormal Infidel conditions on the -mitters to operate successively.

2. The combination of a source of current, a metallic circuit, a plurality of transmitters in-series therein, a plurality of trans lane}; devices controlled by said transmitters, meansoperatedby an abnomnal dis turbance of electrical conditions onthe circuit for establishing two current leads,

one of said leads including a translating device and two or more transmitters,- means forcontrolling said included transmitters to, operate successively, and means for preventin'g mutant interference. of thecurrent inn pulses respectively sent. by said transmitters.

3. The combination of a source of current, a metallic circuit, a plurality of transmittors in, series therein, thermostatic circuit closers associated with each transmitter and controlling the same, the said thermostatic circuit, closers being relatively timed to cause said transmitters to operate successively, and translating devices controlled by said transmitters. a

In testimony whereof I have affixed my signature in presence of two witnesses.

' c ALBERT GOLDSTEIN.

Witnesses; t

GERTRUDE T. P01111212, MAY T. .MCGARRY.