Abstract: A pushbutton switch capable of conversion from alternate action operation to momentary operation includes a housing, an elongated slider with a heart-shaped cam groove, a removable alternate action stop member, and a helical compression spring. The removable alternate action stop member is in the form of a rigid wire with an upturned pivot leg, a downturned detent leg parallel to the pivot leg and a crosspiece . The upturned pivot leg extends upward through a pivot hole in an upper tongue of the housing and the detent leg extends downward into the heart-shaped cam groove in the slider. A top opening in the housing communicates with the pivot hole and provides an area for side-to-side swinging movement of the crosspiece as the slider moves along a longitudinal axis and the lower end of the detent leg follows the heart-shaped cam groove. A raised cover connected to the upper tongue covers a portion of the top opening and protects the stop member from damage during assembly or use.

Abstract: A push-button sensor switch for controlling and indicating the output of an integrally mounted sensor element is disclosed. The switch includes a frame having a contact stack mounted thereto and which is under the control of a reciprocating plunger extending therefrom. A hollow push-button head housing is attached to the end of the plunger for reciprocal movement therewith. A signal surface member is mounted to the frame and extends into the housing and is visible from a window at the end of the housing. A light sensitive resistor sensor is mounted within a recess in the body of the signal surface member and is therefore located a given fixed distance from the contact stack. A pair of shutters are pivotally mounted within the housing adjacent the window and are engaged by the signal surface member to rotate in response to relative movement of the housing with respect to the signal surface, thereby to alternately conceal and expose the sensor.