Patent GB-334263-A (GB)
Title: Improvements in or relating to electric remote control systems
IPC: H02J13/00
Filed: 1929-06-01
Abstract: 334,263. Reyrolle & Co., Ltd., A., Leeson, B. H., Anderson, W., and Lambert, D. E. June 1, 1929. Selective distant control and signalling systems.-An electric selective remote control system comprises the combination with two contact-making selectors disposed respectively at, the control station and at the controlled station and to which corresponding step-by-step movements are to be imparted, of a rotary controlling drum for each selector, the drum performing a series of sequential angular movements for each stepped movement of the selector, means being provided for ensuring the correct relationship between the movements of the two drums. Control of selectors, Figs. 1, 2, 3 and 5. At the control station a selector A to which stepby-step movements are imparted to bring it successively into a number of selected positions respectively associated with substation apparatus to be controlled, is provided with a peripherallyslotted disc A<3> adapted to be driven by two diametrically-opposite pins C<1>, C<2> on one side of a pin wheel C. The pins C<1> C<2> cause each stepped movement of the selector from one selected position to another to be made in two parts (half notch movements). The wheel C is also provided with pins C<3> - - C<8> arranged in two circular rows at different radii. These pins cooperate with a slot E<1> in a plunger bar E<2> moved radially by an escapement coil E, so that when the coil is energized the slot E<1> lies in the path of the pins in the inner row and when the coil is de-energized the slot is in the path of the outer row of pins. The pin wheel C is carried by the shaft of a rotary drum D which is under the influence of a spiral spring G<1>, Fig. 5, tending to rotate the drum. One end of the spring is fixed to a shaft G<2> carrying a worm wheel G<3> engaging teeth on the periphery of the wheel C. The outer end of the spring is attached to a cage G<4> provided with teeth engaging a worm wheel H<1> carried by a bracket H rotatably mounted on the shaft G<2>. The bracket H is normally acted upon by a spring H<3> to bring a contact H<2> between two fixed contacts J<1> in the circuit of a motor J. A worm J<3> on the motor shaft engages with the wheel H<1>. The arrangement is such that the motor acts to wind up the spring, the contacts H<2>. J' being opened when the force exerted on the wheel H<1> by the motor and the spring G<1> exceeds the tension of the spring H<3>. The substation is similarly provided with a selector a, a pin wheel c, a rotary drum d, an escapement wire e, spring-winding means g. In a modification the wheels C, c instead of being provided with pins for engagement in slots in the plunger bars E<2>, e<2>, are formed with slots for engagement with pins on the plunger bars. The control station apparatus is connected to the substation by two wires K, K'. The selector A is provided with a contact segment A5 coacting with a pair of spring contacts A6, the contacts A5, A6 being closed in all selected positions other than the normal zero position of the selector. The drum D has three contacts D<2>, D<4>, D<6> coacting respectively with pairs of spring contacts D<3>, D<5>, D<7>. Three hand-switches are provided at the control station, a switch M for step-bystep selection, a switch N for " express selection," and a switch L adapted to control the establishment of a metering circuit. The switch M operates contacts M<1> through a lever M<2>, one end of which normally rests against a spring-controlled flap M<3> carried by a disc M<4> on the shaft D'. Selection of apparatus at the controlled station, Figs. 1, 2, and 3. Depression of push M closes contacts M<1> and energizes the escapement coil E so that the bar E<2> moves to allow the pin C<3> to pass through the slot E', the drum D making a small angular movement until arrested by the pin C<4> engaging the bar. The push M being released, the coil E is de-energized so that the bar E moves inwardly to permit pin C<4> to pass through the slot E'. The drum makes a second angular movement until stopped by the pin C<5>, the pin C<1> at the same time causing the selector A to 'move through its first " halfnotch " movement. This closes contacts D, D<3> whereby a circuit is complete through the escapement coils E, e, the pilot wires K, K<1> and the drum contacts D<2>, D<3> and d<8>, d<10> Both plunger bars E<2>, e<2> move outwardly allowing both drums to rotate. The drum D is arrested almost immediately by means of the pin C<6>, but the drum d continues to rotate bringing a pin c<1> into engagement with a slot in the disc a<3> so that the substation selector a makes a " halfnotch " movement. The rotation of the drum d is arrested by means of pin c‹ and at the same time drum contacts d<8>, d<10> open to break the circuit to the coils E, e. The plunger bars then move inwardly allowing pins C<6>, c<6> to pass through the slots and the drums to rotate until arrested by the pins C<7>, c'. If the meter switch L has been operated the escapement coil circuit is broken and the drums and selectors remain at rest in their half-notch position. In this position contacts D<4>, D<5> and d<9>, d<10> are closed. If however the switch L is in normal position the coils E, e are again energized and the bars E<2>, e<2> act to allow passage of the pins C<7>, c<7>, but the drum D almost immediately stops due to pin C<8> and the drum d rotates until arrested by the pin c<8>, the pin c<2> at the same time driving the selector a through its second half-notch movement, at the end of which the contacts d<9>, d<10> are opened. The coils E, e are therefore again de-energized, so that the bars E<2>, e<2> move inwardly to allow passage of the pins C<8>, c<8>, the drums completing their rotation until arrested by the pins C<3>, c<5> in the normal zero position, and the selector A being driven through its second half-notch movement by the pin C2. The pin c<13> may replace the pin c<8>, if it is desired that the two selectors should perform their second half-notch movements simultaneously. For express selection the push N is provided, the contacts of which are in series with contacts A<5>, A<6>, D<6>, D<7>. Depression of the push N causes a series of selecting movements to be performed until the push is released or the normal zero position is reached. In a modification both stepby-step selection or express selection is obtained by a single hand-push, step-by-step selection being obtained by a depression and release movement and express selection by depressing and twisting the push. The invention is described in association with electric remote control systems in which metering circuits can be established when the selectors are in the half-notch positions. These systems form the subject-matter of the invention claimed in Specification 334,846, and are described in the abridgment of that Specification. Specifications. 307,379, 307,381, 307,383, 317,422, 333,172, and 334,264 also are referred to.