Electric switch

Details Electric switch Electric switch

H - Electricity

01

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H01H 3/12 (2006.01) H01H 13/14 (2006.01) H01H 13/48 (2006.01) H01H 13/50 (2006.01)

Patent

CA 1147000

Abstract of the Disclosure A push-switch comprising a moving contact of partial- hemisphere-face-shaped resilient metal diaphragm which is disposed with its periphery on a pair of peripheral fixed contacts in a contacting manner and at its central part spaced above a central fixed contact. The metal diaphragm moving contact has an opening having at least a protrusion with respect to the opening; so that the opening allows air to pass at inversing and restoring motions of the central principal part of the moving contact, thereby preventing dust from being drawn onto the central fixed contact. The protrusion slides on and cleans the surface of the central fixed contact at each motion of the central part of the moving contact.

357845

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