Smoke and heat detector alarm

DETAILED DESCRIPTION This invention relates generally to the field of alarm systems, and more particularly, is directed to a self-contained alarm system that is equally responsive to the presence of smoke and to the presence of heat to function both a compressed gas powered horn and an electrically power buzzer alarm.
The alarm device of the present invention includes a self contained energy source which may be in the form of a conventional compressed gas tank containing an easily compressed gas in liquid form such as "Freon" gas.
A lever controlled valve connects to the gas tank outlet and feeds two separate gas conduit systems, each system of which leads to a separate sounding device, such as gas operated horn of the type capable of producing an alarm signal of 115DBa.
A heat sensitive, fusible element is employed to normally retain the valve lever in the closed position.
One of the gas conduit systems receives directly gas from the valve when the lever is released upon fusing of the fusible element which is designed to melt at a predetermined elevated temperature, for example, 136.
degree.
F.
or 174.
degree.
F.
, depending upon the predetermined conditions of use.
Interposed in the second gas conduit system is a conventional solenoid operated valve which is normally closed but which may be moved to its open position upon triggering of a self contained smoke detection device.
The smoke detection device may be of any well known, approved type such as a photoelectric cell smoke detector or an ionization products of cumbustion smoke detector.
Thus, the combination smoke and heat detector of the present invention is completely self contained and is equally responsive both to the presence of the predetermined elevated temperature and to the presence of a sufficient concentration of smoke.
The smoke detection device also includes an electrical buzzer and an electrical circuit which is normally open.
Release of the valve lever upon melting of the fusible element causes the electrical circuit to close to thereby function an electrical alarm signal such as a buzzer