Enclosure alarm system

Claim 1

An alarm system for association with an enclosure which is closed by the movement of a member of the enclosure relative to the remainder of the enclosure to give an audible alarm upon an improper entry into the enclosure by an opening movement of the enclosure member but will be silent upon a proper entry into the enclosure by an opening movement of the enclosure member, said alarm system comprising: a casing member for association with the enclosure, means mounted within said casing member for providing a source of direct current; audible alarm means mounted within said casing member and electrically connected in series to said direct current means; deactivating switch means operatively positioned on the casing member and available for actuation exteriorly from said enclosure and electrically connected in series with said alarm for interrupting the circuit from said direct current means to said alarm means to thereby permit authorized entry into the enclosure by an opening of the enclosure member when desired; and a pressure responsive switch means mounted on the enclosure for direct engagement with and depression by the enclosure member to open said pressure responsive switch means when the enclsoure member is in a closed position, thereby placing said alarm means in a deactivated state, said pressure responsive switch means, upon an improper movement of the enclosure member to an open position, closing the circuit between said direct current means and said alarm means, so that such improper opening movement of the enclosure member without a prior deactivating of the alarm by a positive actuation of said deactivating switch means will cause the activation of the audible alarm system to give and continuously maintain an audible noise until the deactivation thereof is initiated by a positive actuation of either the deactivating switch means or the pressure responsive switch means.