| 摘要 |
998,484. Locking rotary elements. ARROW ELECTRIC SWITCHES Ltd. April 17, 1962 [April 19, 1961], No. 14761/62. Heading F2E. [Also in Division H2] A device responsive to predetermined shock values for moving a holding member from a predetermined position, e.g. from a locking position to a releasing position, comprises shock responsive means which are connected by a flexible element to the holding member, the arrangement being such that the holding member is moved from the predetermined position in response to a predetermined shock force value irrespective of the force direction. As shown, the spindle 29 of a rotary electric switch carries a latched member 28 which is normally prevented from rotating in one direction by a lug 26 which is vertically slidable in a housing formed by a pair of similar recessed members 10 and is urged towards the member 28 by a spring 21. A cable 14 passes through a central space between the members 10 being trained around a pulley 30 on the lug 26 and fixed pulleys 32, 34. The ends of the cable are secured by set screws 62 in masses 16, 18 arranged externally of the housing and abutting identical masses 36, 38 which are loose on the cable and accommodated in recesses within the housing. As a result, equal shocks delivered in any direction increase the tension in the cable by the same amount so that any shock exceeding a predetermined force value results in the lug 26 being withdrawn from the member 28 against the action of spring 21. The latter is adjustable by screw-and-nut means 22 to vary the responsiveness of the device. The lug 26 may be manually released, either by plungers 66 mounted on the device and interconnected by a manually-operated bar, or by the energization from a remote control point of solenoids 40, 50 which extend stepped armatures 42, 52 towards the masses 16, 18 against the action of springs 46, 56. The masses 16, 18 are engaged by the plungers or armatures, respectively, and moved to one of other of the dotted-line positions to pull the cable 14, so withdrawing the lug 26. Specification 587,059 is referred to. |
