Miniature acceleration switch
First Claim
1. A miniature acceleration switch, comprising:
- a hollow, cylindrical, electrically conductive casing closed at one end and open at its other end to define a cylindrical chamber therein;
a massive spherical member rollable axially in said chamber;
a header closing said other end of said casing, said header having a lead wire extending axially through an insulator into said casing;
an electrically conductive ring surrounding said lead wire and secured to said other end of said casing;
a lightweight piston movable axially in said casing;
an electrically conductive contact member carried by said piston; and
a coil spring extending axially in said casing, one ned of said spring contacting said ring, and another end of said spring contacting said contact member, so that said coil spring in normally expanded position holds said contact member, spaced from said lead wire;
whereby a force of acceleration directed axially of said casing causes said spherical member to move said piston and said contact member into contact with said lead wire.
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Accused Products
Abstract
This miniature normally open circuited acceleration switch has a hollow cylindrical casing closed at one end. Its other end is closed by a header having an insulated axial lead wire extending inwardly of the casing, and an electrically conductive ring secured peripherally to the casing. Inside the casing is an internally conical guide sleeve in which is a freely rollable massive ball. A lightweight cup-shaped piston in the guide sleeve carries a contact member spaced by an expanded coil spring from the lead wire. The ball impinges on the piston when a sufficient axially directed force of acceleration is applied to the casing, even if a simultaneous laterally directed force of acceleration is applied thereto. The piston moves axially against the spring bias such that the contact member contacts the lead wire to close the normally open circuited switch.
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Citations
12 Claims
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1. A miniature acceleration switch, comprising:
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a hollow, cylindrical, electrically conductive casing closed at one end and open at its other end to define a cylindrical chamber therein; a massive spherical member rollable axially in said chamber; a header closing said other end of said casing, said header having a lead wire extending axially through an insulator into said casing; an electrically conductive ring surrounding said lead wire and secured to said other end of said casing; a lightweight piston movable axially in said casing; an electrically conductive contact member carried by said piston; and a coil spring extending axially in said casing, one ned of said spring contacting said ring, and another end of said spring contacting said contact member, so that said coil spring in normally expanded position holds said contact member, spaced from said lead wire; whereby a force of acceleration directed axially of said casing causes said spherical member to move said piston and said contact member into contact with said lead wire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification