Patent GB-145722-A (GB)
Title: Apparatus for the transmission of rotary movements from a distance with synchronously acting transmitter and receiver
IPC: F41G5/06
Filed: 1920-07-02
Abstract: 145,722. Krupp Akt.-Ges., F. July 26, 1916, [Convention date]. Mountings.-Relates to electric arrangements for transmitting definite angular movement to a distance, and consists in moving the receiver to agree with adjustment of the transmitter either simultaneously or after the lapse of any desired period. The apparatus is particularly applicable to controlling the carriage of a gun which may be required to remain at rest, as for loading, during adjustment of the transmitter. The transmitter comprises a single winding A to which leads C supplying alternating current are connected at adjustable points by a rotatable brush carrier B having contact brushes b<1>, b<2> co-operating with slip rings A<2>, A<3> connected to the leads, and brushes b<3>, b<4> respectively connected to brushes b<1>, b<2> and adapted to wipe over the segments of a commutator A<1> connected to the winding A as shown. Leads D are connected to the winding A at three equally spaced points, and convey current to three-phase windings E, Q of the stators of auxiliary and main receiving devices respectively. The rotor of the auxiliary receiver has a coil P receiving current from the leads C. The rotor F of the main receiver has a threephase winding receiving current from three equally spaced points of a winding G in an auxiliary transmitter situated at the receiving station, this auxiliary transmitter being similar to the transmitter A, B, and having a rotatable brush carrier H, the slip rings being connected to the leads C through a cut-out J<1>. The rotor F drives a wheel F<1> gearing with a wheel K which moves the gun carriage, and also drives a wheel M having a second set of internal teeth M<1>. The shaft n<1> of the rotor P drives a wheel N concentric with the wheel M'. Between, and gearing with, the wheels N, M' is a planet wheel R carried on a member n<2> capable of rotation on the shaft n<1> and having a pointer S making corresponding movement over a dial T. When the cut-out J' is closed, rotors F and P move simultaneously with adjustment of the transmitter arm B, which may, in the application described, carry a sighting telescope to be directed on the target. The ratios of the gear-wheels are so chosen that under these conditions the wheel R does not move round the shaft n<1> and the pointer S remains in the zero position. When it is desired that the gun carriage shall remain at rest, cut-out J' is opened. Adjustment of the arm B then effects movement of the rotor P, but the rotor F remains at rest. Wheel M<1> being stationary, rotation of the wheel N causes the wheel R to travel round the wheel M' and the pointer moves from the zero position. When it is desired to effect corresponding adjustment of the gun carriage, cut-out J' is closed and the arm H is manipulated so that rotation of the rotor F brings the pointer back to the zero position. This adjustment can be made whether the arm B of the transmitter is at rest or rotating. A modification is described in which the rotor windings F are connected to the leads D, the windings E being omitted, and the winding G of the auxiliary transmitter serving also as the stator winding.