Patent GB-243041-A (GB)
Title: Improvements in or relating to remote control mechanism
IPC: F16C1/00
Filed: 1924-06-18
Abstract: 243,041. Barber, W. E. June 18, 1924. Bowden and like mechanism for controlling from a distance apparatus such as electrical instruments and switches, wireless apparatus, bombrelease gear or photographic apparatus on aircraft, engines and lighting equipment. A material known as hardened and tempered steel flexible shafting, consisting of a number of superposed windings of closely coiled wire, adjacent layers of which are wound in opposite directions, which is practically inextensible, is employed as the inner member of the mechanism to convey a push, a pull or rotation. The outer member consists of brass or other piping which can be. bent in any direction. The inner member 1, Fig. 3, is attached by means, of a head 12 on a ferrule 11, and a nut 15, or a split spring cap, to jaws 13 on the stem of a cylindrical slide 7 moving in a slotted guide 9. The outer member 2 terminates in a thimble 18 located in a lug 20 on the base plate 17 by a nut 21 having a shank 22 engaging a keyhole slot' in the lug. The slide is connected by a pin 3 and slot 4 to a hand-lever 5, or an operated lever, the movements of which are limited by nuts 43 and are indicated by a pointer 37 moving over a scale 38. In a modification, a hand-lever or an operated lever engages a slotted arm which projects from the slide through a slot in the guide tube, and in another form the hand-lever passes through a ball-shaped cross-head rotatably mounted in the slide. The lever may work in a gate and a spring detent may be provided to hold it in one or more predetermined positions. Fig. 11 shows in section a modification in which the slide is formed with cylindrical rack teeth 7<x> for actuation by a pinion 10 on a handle 23 which is provided with a scale. The handle may be rotated slowly through reduction gearing 40, 41, 42. A pin 26 on the slide moves in a slot to limit its movement'. As shown in Fig. 17 the inner member 1 is secured to a ferrule 11<x> square in cross-section, which is adjustably connected to the slide 7 by a nut 24 locked by a screw 31 to an operating-handle 23. The handle imparts a pull, a push or rotation to the member 1, the movement being limited by a pin 26 moving in an appropriately shaped slot 27. The outer member 2 terminates in a thimble 18<x> secured on the cylinder 9 by a set-screw 180. One operating-device may be arranged to act' on two Bowden mechanisms by providing a yoke on the slide to which two of the inner members are secured. Operating or operated devices may be arranged at intermediate positions in the mechanism as well as at the ends. As shown in Fig. 22, operating devices are arranged a. the positions X, Y, and an operated device at the position Z. A slide 7 at the. position Y is operated by a screw 230 and a nut 240 carrying a pointer 32, the screw being rotated by bevel or worm gearing 34. A similar operating device at t'he position X is connected to that at the position Y by an auxiliary mechanism 2" transmitting rotation. Irregular movement of the inner member may be obtained by means of a rotary cam formed with an appropriate surface to engage a pin projecting from the slide 7.