Abstract: This invention relates to a movement monitor that is suitable for detecting movement, and also provides an alarm should movement that is being monitored cease. The movement monitor is particularly suitable for use with humans or other living organisms where breathing movement is being monitored. In considering the use of the movement monitor on human infants, it is particularly useful for preventing death from Sudden Infant Death Syndrome. The movement monitor comprises a rigid base member for supporting the moving object which is being monitored, and is provided with a reaction means which is secured to the base member and arranged to extend over and be held in contact with the moving object. A transducer is placed between the rigid base member and the moving object such that when movement occurs, the reaction means causes force to be applied to the transducer.

Abstract: A housing is mounted interiorly of a door frame member and houses first and second switch members which move simultaneously in response to entry of a lock bolt end into a strike plate opening. A switch on the housing is in circuit with an indicating unit having illuminated door open and door locked signals and a power source. The first and second switch members are in sliding contact with one another and are displaced laterally away from the lock bolt as it moves to a door locking position. A projection on the first switch member is normally disposed in the strike plate opener.