Patent GB-693184-A (GB)
Title: Remote control mechanism especially for vehicles with power transmission through fluid drives
IPC: F16H61/52
Filed: 1950-11-09
Abstract: 693,184. Linkwork; cams. KRUPP LOKOMOTIVFABRIK, F. Nov. 9, 1950 [Nov. 23, 1949], No. 27408/50. Class 80 (iii). In a remote control mechanism on a train of vehicles a receiver member on one vehicle is adapted to be moved precisely to one of a number of selected positions by a transmitter member on another vehicle which does not require corresponding precise adjustment. As shown in Fig. 1, continued movement of a lever 1 on one vehicle is transmitted to a receiving member 13 on another vehicle in a series of steps by a Bowden cable 2 and spring control devices 3, 5 arranged in the transmission. The device 3 merely comprises a spring link with a suitable strength spring 19, one end of which is connected to the lever 1 through the Bowden cable 2 and the other end is connected to a rod 12 of the device 5. This rod 12 .is coupled to the member 13 and has a collar 14 thereon which is acted upon by a series of successively stronger springs 6, 7, 8. The spring 6 is supported by a cup shaped member 15 which is urged against a fixed shoulder 17 of the casing of the device 5 by the spring 7 which spring is similarly supported by another cup shaped member urged by the spring 8 against another shoulder. When the lever 1 is moved to the left the rod 12 is moved towards the right together with the member 13 and compressing the spring 6 until the collar 14 abuts against the cup member 16. Movement of the rod 12 and member 13 then stops, the spring 19 of device 3 being compressed until it is strong enough to overcome the additional resistance of spring 7. The rod 12 and member 13 then move again until the spring 7 is compressed sufficiently for the cup member 15 to abut the cup member of spring 8 when another period of rest of rod 12 take place. Finally the spring 8 is compressed and a graph of movement shown horizontally in Fig. 2 against spring resistance is obtained. In a modified arrangement the connection from the lever 1 of one vehicle and the device 3 on the other vehicle is provided by electrical conductors with an electric follow-up control so that the operated member of device 3 moves in accordance with the movement of lever 1. The final receiver member 13 may actuate a control valve of a fluid-pressure servo device which may act on a governor sleeve to control the speed of a driving motor of the vehicle train or act to adjust the blades of a fluid transmission drive. In another modification, Figs. 4 and 5, the spring devices 3, 5 are replaced by a cam 67a on one vehicle which is operated by the lever 1 on the other vehicle through an endless belt or chain 80. The periphery of the cam is divided into sectors of increased radius 91, 88, 89, 90 alternating with sectors of constant radius 84, 85, 86, 87 so that the receiver member 13 is operated in a series of steps with dwell periods on continuous movement of lever 1. Thus precise adjustment of the lever 1 is not necessary to effect a step movement of member 13. In a further arangement a cam device on one vehicle is operated by a lever on the other and actuates through a fluid-pressure device a pair of spring devices 5 for controlling the adjustable blades of two separate fluid drive devices.