Patent GB-404961-A (GB)
Title: Improved device for effecting and maintaining remote or distant control of rail motor trains and for other purposes
IPC: B60L15/34
Filed: 1932-07-08
Abstract: 404,961. Remote-control systems. WAKLEY, W. J., Molewood House, Hertford. July 8, 1932, No. 19403. [Class 40 (i).] In a remote-control system for the gear box or throttle of a vehicle driven by an internal-combustion engine, movement of a control lever in one direction causes the gear or throttle opening to be electrically selected whilst movement of the control lever in a direction at right angles to the first movement causes pneumatic power to effect the required change of gear or throttle. The invention is described as applied to a gear changing mechanism. The motor is automatically declutched during the gear changing operation. Construction of transmitter. The transmitter is shown in Figs. 1-4. The control handle 49 fits into a socket 58 which is rotatable about shaft 52 and about shaft 55. The handle moves in a gate of the form shown in Fig. 4 and when pressed forward into recesses 51 marked b, c, d, e, the contact member 72 completes circuits through fixed contacts 71 for the position control magnets. The movement of the handle about shaft 52 also drives, through lost motion gearing, the wiper 67 which, when the handle is pressed into its recess to complete a control, engages one or other of the contact pairs 74, 88 or 75, 87 which determine the " up " or " down " movement of the gearing. The gate is cut away in the neutral position a so that the handle can be withdrawn and inserted into sleeve 78 to move member 84 into contact with either 85 or 86, completing the circuits for the backward or forward drive. Construction of receiver. The receiver is illustrated in Figs. 5, 6, 7. When one of the magnets 128-131 is energized its armature, through linkage 132, 133, moves the pin 135 into the line of the sliding member 118. This member is connected to two pistons mounted in cylinders on either side of the casing 119, the two pistons corresponding to up or down movement. One piston 115a and cylinder 113 only is shown. The block 118 is shown in Fig. 6 in its neutral position, and if the pressure medium is now allowed to enter tube 112, the piston 115a is forced along cylinder 113 driving block 118 until it is held by an operated pin 135, the gear changing function being performed through a member such as 136. Instead of providing two cylinder assemblies a single cylinder 113 can be provided with means for applying pressure to either side of the piston 115a, as required. Operation of the system. A typical circuit diagram showing two control positions A and two motor control units B is indicated in Fig. 9. The member 84 having been moved to make either contact 85 or contact 86, corresponding to forward or backward drive, the handle is moved to bring 72 into contact with the required stud b-e and the handle is pressed forward making either 87 or 88, corresponding to an up or a down gear change. Magnet 108 or 109 energizes to control the entry of pressure medium into the cylinder, as 113, and the relative magnet 128-131 corresponding to the position of 72, energizes to place its stop-pin into the path of the block 118. If the throttle of the engine is to be operated, the controlling slot or gate, Fig. 4, should be of a sinuous instead of a notched form.