Abstract: A timer mechanism including a base piece, a top piece, a rod, and a spiral spring. The base piece includes an inner hub forming a threaded surface and a central passage. The top piece includes an inner post that a central passage and a threaded surface for engaging the inner hub. The rod is slidably disposed within the central passages and is selectively coupled to the top piece. The spiral spring is coaxially wrapped about the inner hub and terminates in a leading end connected to the top piece. The top piece is rotatable relative to the bottom piece to a raised position in which energy is stored by the spiral spring. The spiral spring rotates the top piece in an opposite direction, causing the top piece to wind relative to the bottom piece, forcing the rod downwardly for depressing a camera shutter release button.

Abstract: A camera to be used with a film advance motor and/or a self timer, comprising a main body part having an engageable portion, and a single-piece multi-adapter fixture having an engageable portion constructed to be connected with the engageable portion of the main body part to secure the single-piece multi-adapter fixture to the main body part, having another separate portion constructed to hold the film advance motor, and having another separate portion constructed to hold the self timer, in order to support the film advance motor and/or the self timer on the main body part to permit the camera to be used either with the film advance motor or the self timer or with the film advance motor and the self timer.