Safety edge switch
First Claim
1. A safety edge switch of the type having an elastic hollow body with a hollow chamber presenting interior conductive surfaces which develop a switching pulse when brought into mutual contact, characterized by said elastic hollow body (1) having at least two strip-like electrically conductive projections (2) with conductive surfaces extending into said hollow chamber and at least one opposing surface thereon which is electrically conductive and extends along the interior of said hollow chamber whereby switching pulses occur upon mutual contact of said conductive surface of at least one of said projections and said opposing surface.
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Accused Products
Abstract
Safety edge switch for power-actuated devices such as roller gates, roller grilles, lifting platforms and working platforms as well as for securing movable objects and machines having a hollow elastic profile, which exhibits, at least on its inner side, surfaces that are electrically conductive by virture of admixtures of conductive substances, such as carbon black, graphite and metal powder, mutual contact of the electrically conductive surfaces leading to a switching pulse. The hollow body exhibits in the interior at least two strip-like, electrically conductive projections and at least one opposing surface, likewise electrically conductive, guided along the hollow body, by which means contacting between the electrically conductive surfaces is improved. The use of multiple electrically conductive projections insures adequate electrical contact between the conductive projections and the opposed conductive surface even when the operating force is applied from various directions.
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Citations
12 Claims
- 1. A safety edge switch of the type having an elastic hollow body with a hollow chamber presenting interior conductive surfaces which develop a switching pulse when brought into mutual contact, characterized by said elastic hollow body (1) having at least two strip-like electrically conductive projections (2) with conductive surfaces extending into said hollow chamber and at least one opposing surface thereon which is electrically conductive and extends along the interior of said hollow chamber whereby switching pulses occur upon mutual contact of said conductive surface of at least one of said projections and said opposing surface.
Specification