Portable fire alarm

Claim 1

In a self contained temperture sensitive fire alarm of the type wherein a sound producing means is actuated by a pressurized fluid released from a reservoir when a seal is broken as a result of fusion of a fusible plug at a preselected temperature, the improvement comprising: a cover for mounting on the underside of a substantially horizontal surface by means of a pivotal mounting at one end thereof and said fusible plug at the opposite end thereof; and a reservoir, housed within said cover and having a valve seal and associated plunger and striker means, for pivotal mounting on said horizontal surface at a position adjacent said fusible plug so that, upon fusion of said fusible plug as a result of a rise in ambient temperature to said preselected temperature, said cover and said reservoir pivot away from each other, under gravity, to a substantially vertical position in which said plunger contacts said striker means thereby depressing said plunger so as to break said valve seal and release said fluid.