Shock sensor switch
AssigneeGrant Design Limited
InventorJohn T. Grant
Life of this patent
Estimating the term…
Abstract
A vibration sensitive switch has a pair of spaced apart parallel contacts contained within a switch body and a movably supported tubular mass inside a chamber in the body. The mass is supported by conductive men, bets in the form of two pairs of contact bars secured at each end of the tubular mass and located between the two contacts so that both sets of bars are in electrical contact and resting on and between them by force of gravity. The contact bars are suitably arranged to cross each other at the axial center of the tubular mass and angled to provide a wedging action when at rest thus providing higher contact pressure than would normally be obtained.
Claims12
A vibration sensitive switch comprising a body part and a movable mass part, the body part including a pair of electrical contracts for connection in an electrical circuit, and the mass part including a bridging conductor for providing a bridging connection between the contacts which is interrupted when relative movement between the body part and the mass part occurs due to vibrations to be detected, wherein the bridging conductor comprises at least one pair of mutually inclined and electrically interconnected bars which form opposite sides of a wedge which is received in a receptacle defined by the contacts, the wedge being arranged to bear against opposite sides of the receptacle such that the mass part is supported with respect to the body part, and wherein the contacts and the bridging conductor are associated with interengaging surfaces of the wedge and the sides of the receptacle, whereby movement of the wedge out of engagement with the receptacle aides results in the interruption of the bridging connection.
Dependencies are inferred from the claim text.