| 摘要 |
966,585. Retractive switches; cam-operated switches. A. C. WICKMAN. June 27, 1962 [July 5, 1961], No. 24218/61. Heading H2B. [Also in Division F2] A rotary switch mounted at the end of a gearshift lever 16 (see Division F2) comprises a hand lever 18, Figs. 2, 3, and a slotted hub 25 of insulating material turned about the axis of the gearshift lever so that a spring-biased pawl 31, connected to air energized insulated wire 28, can enter a slot 35 in the hub and contact a conducting knob support 24 screwed on to the end of the gearshift lever, itself connected to earth. The pawl 31 co-operates with the slot 35 and with an abutment on the hub 25 to limit the angle through which the hand lever 18 may be turned. In a modified form, the hand lever 18 and rotary switch mechanism are mounted by a universally tiltable ball-and-socket connection 56, 59, Fig. 10, at the end of the gearshift lever 16, a spring 60 biasing the ball &c. to the position shown. When the hand lever 18 &c. is tilted against the bias of the spring 60 relatively to the gearshift lever 16, the lower end 63 of the ball member 63 engages a contact ring 62 energized through an insulated wire 64 and mounted within the gearshift lever by means of an insulating ring 61. As a modification, the ball-andsocket connection 56, 59 can be replaced by a transverse pivot passing through the centre of the ball at right angles to the lever 18. In another modification, Fig. 9 (not shown), the hand lever 18 is fast with a shaft extending down the centre of the gearshift lever and acting at its lower end through a cam upon electrical contacts. |
