Safety edge switch
First Claim
1. A safety edge switch for power-actuated devices such as roller gates, comprising:
- a hollow rubber profile (1) including a tubular basic body part (2) with a hollow interior, a knife-edge rib part (5) within said interior, said rib part and said tubular basic body part presenting confronting contact surfaces which are electrically conductive and, when brought into contact, are operable to cause a switching pulse, said rib part (5) and said tubular basic body part (2) being rendered wholly electrically conductive by their being comprised of an admixture of conductive substances and an electrically conductive wire (6) disposed within one of said parts.
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Accused Products
Abstract
A safety edge switch for power-actuated devices such as roller gates, roller grilles, etc., and lifting platforms, working platforms and the like, as well as for the guarding of machines or spaces, for example as safety flooring, with a hollow rubber profile (1) within which there is a knife-edge rib (5), the surface of the rib and the opposing surface of the hollow rubber profile being made electrically conductive and the mutual contact of the surfaces leading to a switching pulse. The requisite conductivity of the hollow rubber profile is achieved by virtue of the fact that the rib (5) and the main part of the hollow rubber profile (1) are made wholly electrically conductive, the conductivity arising through the admixture of conductive substances such as carbon black, graphite, metal powder and the like. The rib and the main part of the hollow rubber profile are insulated from each other by virtue of the fact that ordinary nonconductive rubber is present between these parts. The conductivity in the rib of the main part of the hollow rubber profile (1) can be enhanced by means of electrically conductive wires ( 6) of metal, carbon fibers or graphite fibers and the like.
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Citations
17 Claims
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1. A safety edge switch for power-actuated devices such as roller gates, comprising:
a hollow rubber profile (1) including a tubular basic body part (2) with a hollow interior, a knife-edge rib part (5) within said interior, said rib part and said tubular basic body part presenting confronting contact surfaces which are electrically conductive and, when brought into contact, are operable to cause a switching pulse, said rib part (5) and said tubular basic body part (2) being rendered wholly electrically conductive by their being comprised of an admixture of conductive substances and an electrically conductive wire (6) disposed within one of said parts. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A safety edge switch for power-actuated devices such as roller gates, comprising:
a hollow rubber profile (1) with a hollow interior, a knife-edge rib (5) within said interior, said rib and said hollow rubber profile presenting confronting contact surfaces which are electrically conductive and, when brought into contact, are operable to cause a switching pulse, said rib (5) and a main part of said hollow rubber profile (1) being rendered wholly electrically conductive by their being comprised of an admixture of conductive substances, a mounting strip (3) molded onto said hollow rubber profile (1) and an electrically conductive wire (7) disposed within said mounting strip (3). - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
Specification