Patent GB-190626148-A (GB)
Title: Improvements in or relating to Controller Systems chiefly for Electrically Propelled Trains or Vehicles
Filed: 1906-11-19
Granted: 1907-05-23
Abstract: 26,148. Siemens Bros. Dynamo Works, Ltd., Jenkin, C. F., and Lydall, F. Nov. 19.. Motor control systems; switches.-A controller system for electric trains and for other purposes is provided with means for enabling different types of switch arrangements to be actuated from the same master controller through the same train wires. The connexions on a car A are shown in Fig. 1, and include the coils S<1> .... S<5> of singleacting switches connected between train wires 1 .... 5 and earth. This is followed by a car B with coils C<1> .... C<6> of switches acting two at a time. These coils are connected. to the contacts c, c<1> of auxiliary switches a<1> ..... a<5>. operated by solenoids b connected between the train wires 1 ... 5 and earth. When the controller on the car A is moved to energize the coil S<1> and so close its switch, the first solenoid b on the car B is energized through the train lead 1. This closes the switch a<1>, completing the circuit of the switch coils C', C<2> between the conductor C<x> and earth, and so operating the two switches. Interlocking devices may be used to prevent switches operated by coils C', C<2>, C<3>, from closing together if both train leads 1, 2 happen to be energized momentarily. If the car B runs first and carries the controller, the connexions are made as shown in Fig. 2. The controller being on car B, energizes the train wires 1 .. 6 and switch coils C' ... C<6>, two at a time. Auxiliary switches a' ... a<6> on tne car A are operated by solenoids connected between the train wires and earth. The outer switches a', a<6> have a single pair of contacts, and the others a<2>, . . . . a<5>, have each two pairs, connected, as shown in Fig. 2, to the coils S' ... S<5> of signal-acting switches. When the controller is moved to energize the train leads 2, 3, the coils C<2>, C<3> are energized to operate their switches, and on the car A the auxiliary switches a<2>, a<3> are closed by their coils. These switches together close the circuit of the coil S<2> between the conductor ex and the ground, so operating the switch. Thus, while the switches C<1> ... C<6>, Fig. 2, are operated two at a time, the switches S' ... S<5> are operated one at a time. The arrangements shown in Fig. 3 may be substituted for those shown in Fig. 1. Choking-coils k<1> ....k<5> are connected between the switch coils C' ... C<6>, the middle point of each choking-coil being connected to a train wire. When train wire 3, for example, is energized, a current flows through the two halves of the coil k<3> in opposite directions, to energize the switch coils C<3>, C<4> . The inductance of the other choking- coils is sufficient to prevent a large enough current from flowing to operate the other switches. Choking-coils may be also substituted for the auxiliary switches, in Fig. 2, by connecting the coils across the train wires,- and the middle of the coils to the switch-operating coils Another method by which the switches on the car B can be controlled from car A is to provide the intermediate switches C<2>,... C<5> with two coils, each coil being connected in series with a coil of the next switch, as shown in Fig. 5. The converse arrangement to energize one switch from two train wires consists in providing the electro-magnets with two coils, both of which must be energized to operate the switch. Such a switch is shown in Fig. 7 with two coils M, a plunger M<1> moving opposite a projection M<2>. The invention may be applied to arrangements in which four or more switches are used at a time, or for train control arrangements worked by electro-pneumatic means.