Patent GB-379419-A (GB)
Title: An improved electrically operated resonance device for the control of definite operations
IPC: H02K7/065
Filed: 1931-06-11
Abstract: 379,419. Electric remote control systems. LANDIS ET GYR SOC. ANON., 1, Hopstrasse, Zug, Switzerland. June 11, 1931, No. 17035. Convention date, June 12, 1930. [Class 40 (i).] An electric device for remote control of operations such as, for example, switching operations, and changing over in multiple tariff meters, comprises resonance spring driving mechanism actuated by currents of different frequencies and each mechanism acting on a separate controlling mechanism which effects a definite operation at the end of its period of actuation. In the construction shown in Fig. 1, three controlling mechanisms for performing three operations are provided, each mechanism comprising a freely-mounted wheel 1, 1<1> or 1<11>, a detent lever 2, 2<1>, or 2<11> and a detent wheel 3, 3<1>, or 3<11>. Each wheel such as 1 is adapted to be connected by a spring such as 13 to an associated gear wheel such as 11. The detent wheels are fixed to a shaft 26 carrying a contact segment 27 and adapted on release of the wheels, to be driven by mechanism 25 which may be a Ferraris motor or a resonance spring driving mechanism. The segment 27 is engaged successively by springs 28, 28<1> connected to relay change-over coils 29, 30, of a three-tariff motor. These coils are connected to one conductor 33 of the signalling channel, the other conductor 32 being connected to a spring 28<11> which bears on the hub 31 of the segment 27. With the apparatus in the position shown a circuit is complete through the relay coil 30. Assuming that the resonance spring driving mechanism 15<11>, 16<11> is rendered operative, the gear wheel 11<11> and the disc 1<11>, which are initially in positions similar to those of the wheel 11<1> and disc 1<1>, are rotated until eventually a pin 6<11> on the disc engages a projection 4<11> on the frame 5, rocking the latter to raise the detent levers 2, 2<1>, 2<11>. Lever 2 releases the detent wheel 3 so that the driving mechanism 25 operates to turn the shaft 26 and its contact segment 27. At the same time, the projection 7 on the lever 2 is raised out from a notch 8 on the disc 1, permitting the disc to be turned by the energy stored up in spring 13. When the pin 6<11> on the disc 11" passes the projection 4<11> the detent levers are lowered, the lever 2<11> engaging the periphery of the wheel 3<11> while the shaft 26 is being turned. The disc 11<11> has a, limited movement determined by the width of the notch 8<11>, the spring 13<11> being stressed after this limit has been reached. When the abutment 23<11> rests against the end of the lever 2<11> the rotation of the shaft 26 and the contact disc 27 is stopped. By this time the spring 28<1> is out of engagement with the disc so that the coil 30 is de-energized, resulting in a change over of the meter from one to another tariff. In a similar manner the operation of the resonance spring drive 15, 16 causes the shaft 26 to turn until the segment 27 has just engaged the spring 28, causing the relay coil 29 to be energized, and the operation of the drive 15, 16, causes coil 30 to be energized, as in the position shown. In the construction shown in Fig. 2, each disc and associated gear wheel for example 1<11> and 11<11> are rigidly connected together and a spring 37<11> connects the disc to the shaft 17. Each gear wheel is provided with a pin such as 39 for engagement with an abutment 38. Movement of the disc 1 through its associated spring drive causes the pin 6 to engage the projection 4 and raise the frame 5 carrying the detent levers 2, 2<1>, 2<11>, whereby the shaft 26 is allowed to rotate. When the frame falls back to normal position the projection 7 falls into the notch 8 in the disc 1 and the lever 2 engages the periphery of the wheel 3 until finally it engages the abutment 23, preventing further movement of the shaft 26. Further movement of the disc 1 causes the pin 39 to engage the abutment 38, stopping the rotation of the wheel 1, the spring drive running idle. When the spring drive comes to rest, the spring 37 reverses the original movement of the disc 1 until the pin 6 engages the projection 4. In the construction shown in Fig. 3, two different operations are to be performed. The controlling wheels 1, 1<1> have projections 42, 42<1> respectively, for engagement with projections 41, 41<1> on detent levers 2, 2<1>. When the disc 1<1> is engaged by its resonance spring drive (not shown), the projection 42<1> eventually comes into contact with the pin 41<1> whereby the lever 2<1> is lifted to release the detent wheel 3<1>. The shaft 26 is then turned until the abutment 23 engages the lever 2. The end 43 of the lever is then moved clear from a pin 44 so that the disc 1 is free to move when its resonance spring drive comes into operation.