Patent GB-461351-A (GB)
Title: Control arrangements for variable speed gearing of motor vehicles
IPC: F16H59/04
Filed: 1935-07-08
Abstract: 461,351. Actuating switches. FLEISCHEL, G. July 8, 1935, No. 19498. [A Specification was laid open to inspection under Sect. 91 of the Acts, June 16, 1936.] [Class 38 (v)] [Also in Group XXIV] A selector distributer switch D for controlling vehicle change-speed gearing of the kind using magnetic clutches or brakes comprises sets of separate and alternativelyused distribution elements m and d, Fig. 1, which are connected to the gear box by a multiple cable 4 and cooperate with wipers 25<m> and 25d respectively. In changing up, the operative wiper 25m moves from one to another of the riband terminals m. In changing down, the wiper 25d is operative and this moves from one to another of the riband terminals d, which are spaced more widely so as to free the engine to facilitate this changing down. The change of effectiveness between the wipers 25<m> and 25d is made by reversing the direction of turning of a control knob E. This is turned in the direction of the arrow to change up which brings a finger 22<m> on a conducting disc 16 fast on the shaft 1 of the knob E into contact with a projection 23<m> on an insulating disc 24 loose on the shaft 1. The projection 23<m> is in conducting connection through a riband 24m with the wiper 25<m>, and so, as the knob E is turned clockwise, a battery 10 is connected through brushes 15 and the wiper 25<m> to the selector terminals m in succession. When the knob E is turned the other way, the finger 22<m> leaves the projection 23<m> and the disc 16 turns freely with lost motion until a changing-down finger 22d makes contact with a projection 23d connected through a riband 24<d> with the wiper 25d which is thus in connection with the battery and makes different electric currents selectively as it sweeps over the selector terminals d. There is described with reference to Fig. 2 (not shown), a switch for a gear-box in which magnetic clutch and brake elements are excited in pairs. In this there are two sets of riband terminals m and two changeup pillar wipers 25<m>, and two sets of riband terminals d and two change-down pillar wipers 25d. In Fig. 5 is shown an arrangement with the two sets of riband terminals m alternating in radial direction with two sets of terminals d. There are two ball change-up wipers 25m connected through a riband 24<m> on the insulating disc 24 with the same conducting " projection " 23<a> engaged by a ball finger 22<m> carried round by the conducting disc 16 as it turns with the shaft 1. The distributers d and wipers 25d are also duplicated, there being a single ball finger 22d. This device so far is the selector distributer D shown in Fig. 3 of Specification 459,718, [Group XXIV]. The distributer D in the present arrangement is adapted to be actuated by a handle E<1> with a follow-up electric servomotor A. Thus when the handle E<1> is moved from the reverse position R, Fig. 6, to position II for second speed, it is retained there by a suitable lock 14 and current arriving by a wire w crosses by a stud 9 on the handle to a semicircular electric terminal 18<m>. This completes a circuit 5<m>, Fig. 5, to the servomotor A so that the shaft 1 and disc 16 &c. turn clockwise of Fig. 6 until the terminal 18<m> also carried by the shaft 1 moves clear of the stud - 9 and the parts stop with the stud 9 over a gap 18 between the terminal 18<m> and a like and similarly acting terminal 18<d> for changing down, the motor A turning the reverse way when the current arrives by a lead 5<d>.