A remote alarm module and an alarm system. The remote alarm module has a base which defines a passage. A transient generator is joined to the base. The transient generator is generally non-conducting of electricity after transmission of a single electric transient following the connection of the transient generator to an electrical circuit. A switch has a body and a lever. The body is joined in rigid relationship to the base. The switch has a first terminal and a second terminal. The first termi...

A redundant alarm system including a central controller that interfaces with a first alarm, a second alarm, a visual indicator and an acoustic sensor. When an alarm condition exists, the controller activates the primary alarm causing the primary alarm to generate an audible first alarm signal. The audible first alarm signal is transmitted from the primary alarm to the acoustical sensor. The acoustical sensor detects the audible first alarm signal and transduces the audible first alarm signal int...

The present invention relates to an earthquake alarm that functions as an awakening and early warning mechanism which provides an audio and visual warning to a possible earthquake. The device is comprised of a free-standing arm which rests against an adjustable rod which can be manipulated to make the arm more or less sensitive to vibrations, The arm, which is pivotally mounted within a case, swings downwardly through a slot in the case when vibrations comparable to the vibrations of an earthqua...

A helmet is supplied with a personal alarm safety system (PASS) that detects the absence of motion by the wearer. This usually indicates that the user is unconscious or otherwise incapacitated. Also in the helmet is an automatic activation means which turns on the PASS system as soon as the wearer puts on the helmet. Other features such as visual alarm and inactivation means are included in the preferred embodiment.

A child alarm device consists of a guardian's transmitter and a child's receiver. The transmitter is held or carried by the guardian. The receiver is mounted inside a backpack worn by the child. If the child wanders out of range of the guardian's transmitter, after a short delay an audible alarm is triggered in the child's backpack automatically. One of the child's alarms can be triggered manually by the guardian. As an optional "Panic Button", the child can also trigger an alarm himself by disc...

An alarm clock controls the supply of electrical power to a first outlet mounted on the clock housing and receiving a plug-in external electrical device to periodically change the state of the electrical device in response to an alarm time signal. A second controllable outlet is also mounted on the housing for receiving a second plug-in external electrical device. Selectible steady or pulse power is provided to the second outlet. A receiver detects power line carrier signals on the incoming elec...

An alarm padlock (10) comprising a shackle (12) having a long leg (14) and a short leg (16). A body (18) is provided. A facility (20) in the body (18) is for mounting the shackle (12) in a reciprocal movement between a closed position and an extended open position, in which the short leg (16) of the shackle (12) is outside of the body (18) and the long leg (14) of the shackle (12) can swivel within the body (18). A latch mechanism (22) in the body (18) engages with the short leg (16) of the shac...

An intruder alarm system in which intrusion into an enclosed space is detected as a change in the air pressure in the enclosed space uses a microcomputer to monitor the enclosed space by way of a sensor such that changes in air pressure are compared with a reference set at spaced intervals in dependence upon the ambient air pressure, whereby false alarms caused by changes in the weather are avoided.

A wearable alarm, which can be in the form of a religious cross, jewelry or decorative article or the like, normally found on the user's person, which, through simple sliding action, achieves completion of a contained electrical circuitry and the energization of an audible signaling device. Entry to the operative components may be achieved in any manner, depending on the article in which the alarm is presented and, additionally, the audible alarm varied to provide a warning at any preselected di...

An alarm mechanism for an alarm clock has an alarm hand and an hour hand mounted coaxially with respect to each other, and slideably contacting hub portions of the alarm hand and the hour hand are formed with cam grooves and cam pawls respectively. The cam grooves and cam pawls are positioned with the same positional relationship with respect to the hub portions of the alarm hand and hour hand so that at a preselected alarm time, the cam grooves and cam pawls cooperatingly engage one another to ...