COLIN G KEEFER
Real Estate Commission in Wilkes Barre, PA

4967045, Oct 30, 1990

Jan 2, 1990

7/459477

Colin R. Keefer - Shavertown PA

Harrison Electronic Systems, Inc. - Wilkes Barre PA

H01H 1314

200296

A normally-closed pin switch mountable on a vertical wall and adapted to open only when actuated by a movable closure member. The switch includes a metal bracket defined by a generally-rectangular mounting plate having mounting holes adjacent either end thereof and a ledge cantilevered from the upper edge of the plate at its midsection whereby the bracket may be secured to the vertical wall to position the ledge in a horizontal plane. Integral with the ledge and projecting therebelow is a hollow metal cylinder whose upper end registers with a port formed in the ledge and whose lower end acts as the fixed contact of the switch. Slidably received in the cylinder is a plunger rod of insulation material, the lower section of the rod extending through the lower end of the cylinder and terminating in a contact acting as the movable contact of the switch. The rod is spring-biased to normally urge the movable contact into engagement with the fixed contact to close the switch. The upper section of the rod projects above the port so that when pressed in by the movable closure member, the rod is then axially displaced to effect disengagement of the contacts and thereby open the switch.