Multiple switches for elimination of camera failure modes

Abstract

A camera is provided that includes a door which is selectively movable between an open position and a closed position and a release which is movable between a home position and an away position for selectively retaining said door in said closed position. Door position, release position and film sensors each have at least two states for determining the position of the door and release and for determining presence of film in the camera. The sensors are disposed within an electric circuit for allowing operation of the camera as a function of the states of the sensors. The release is selectively displaceable from the home position for retaining the door, to the away position for releasing the door and the camera is operable only when the door position sensor is disposed in a state corresponding to the door being closed, the release position sensor is disposed in a state corresponding to said release being in the home position and the film sensor is disposed in a state corresponding to film being present in the camera. A film position sensor determines whether film is disposed in a film plane of the camera and maintains operation of the camera uninterrupted by the electric circuit as long as the film position sensor indicates that film is disposed in the film plane.