Abstract: A low-cost, easy to manufacture and maintain pressure responsive switch. The switch includes a pressure responsive diaphragm made from latex rubber that is mounted in a housing base. An annular groove in the housing base communicates with an annular shoulder in a housing cover to compress an O-ring for forming upper and lower chambers, sealing the housing and securing the diaphragm.

Abstract: A sensing edge is provided for causing a door to open by actuating a device upon force being applied to the sensing edge. The sensing edge includes an elongate outer sheath with a first strip of resiliently compressible material affixed to one of the inner surfaces. A first strip of flexible, electrically conductive material is affixed to the strip of resiliently compressible material. A second strip of flexible, electrically conductive material is supported on the opposite inner surface of the outer sheath. The second strip of conductive material faces the first strip of conductive material, with a space being provided between the first and second strips.

Abstract: A continuous linear contact switch is provided. The continuous linear contact switch includes first and second resilient strips, each having first and second longitudinal edges, an outer surface and an inner surface. The respective first and second longitudinal edges of the first and second resilient strips are joined to each other at first and second seams along an entire longitudinal length thereof. Beads are located along the seams on the inner surfaces of the first resilient strip so that the first resilient strip remains generally flat and the second resilient strip is arched to form an inner cavity between the generally flat first resilient strip and the arched second resilient strip. A first flexible, electrically conductive strip is located on the inner surface of the first resilient strip. A second flexible, electrically conductive strip is located along the inner surface of the second resilient strip, spaced from the first flexible, electrically conductive strip.