Abstract: An electrical switch construction having a housing provided with an acutuator for causing movement of a movable switch blade relative to an overtravel compensating fixed switch blade, the fixed switch blade being secured to a rigid terminal carried by the housing and having an extension thereof that is disposed in the path of movement of the fixed switch blade to limit movement thereof in one direction.

Abstract: A control device having an actuator housing and a differential pressure responsive housing secured together so that a certain change in differential pressure in the pressure housing will cause a movable part thereof to move to a new certain position thereof and cause a lever arrangement in the actuator housing to operate an actuator therein. An actuating pin extends between the housings and has opposed ends respectively engaging the movable part of the pressure housing and the lever arrangement of the actuator housing to translate movement therebetween, the ends of the pin not being attached to the movable part and lever arrangement. A tubular bearing means is secured to the pressure housing and telescopically receives the actuating pin therethrough, the tubular bearing member being in fluid communication with the pressure housing so as to provide a fluid bearing for the actuating pin.