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US 4,395,608 AGranted
Safety switch assemblies
AssigneeK. A. Schmersal GmbH & Co.
InventorsKarl-Georg Eicker, Siegfried Schulz, Burkhart Seim
Life of this patent
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Abstract
An electrical interlock comprising a switch operated by a rotatable cam member coupled to the movable switch contacts by a longitudinally movable slider. Rotation of the cam member, which is contained within the same housing as the switch contacts, is caused by engagement, in slots in the periphery of the cam member, of an actuator mounted for movement relative to the switch housing.
Claims15
A safety switch assembly comprising:
- a housing;
- a stationary electrical contact mounted within said housing;
- an elongated slide member mounted for movement within said housing;
- a moveable electrical contact supported on said slide member adjacent a first end thereof;
- cam follower means affixed to said slide member adjacent the second end thereof;
- cam means supported for rotation in said housing, said cam means including a rotatable member having a cam track therein;
- and
- means coupling said cam means rotatable member to said cam follower means whereby said cam track is engaged by said follower means, said cam track being symmetrical with respect to said cam follower means when said cam means rotatable member is in a datum position, angular displacement of said cam means in either a clockwise or counter-clockwise direction from the datum position causing displacement of said slide means to thereby effect relative movement between said electrical contacts to alter the electrical condition of the switch assembly.
5 more elements
An electrical switch comprising:
- housing means, said housing means defining three serially arranged chambers;
- a slide member movably supported in said housing means and extending into all three chambers;
- at least a first stationary electrical contact positioned in a first of said housing means chambers;
- a movable electrical contact mounted on said slide member and located in said first chamber for cooperation with said stationary contact;
- means located in the intermediate of said chambers for establishing a flexible seal between said slide member and said housing means whereby said first chamber is rendered hermetic;
- cam means supported for rotation in the third of said housing means chambers;
- a cam follower affixed to said slide member and cooperating with said cam means whereby rotation of said cam means will impart longitudinal movement to said slide member to establish relative motion between said stationary and movable contacts whereby said switch may be selectively opened and closed;
- and
- actuator means, said actuator means in part extending into said housing means third chamber and imparting rotation to said cam means.
6 more elements
Dependencies are inferred from the claim text.