Electronic watch with an electronically operated sound producer

Claim 1

In an electronically powered watch having a watch casing, a dial attached to one side of said casing, an electronically powered watch movement located within said casing and connected to indicating means on the external side of said dial to indicate the time, an electronic alarm oscillator circuit located within said housing, an alarm switch coupled to said oscillator circuit and controlled by said indicating means, means actuable from externally of the watch casing to adjust the time of closing of said alarm switch, and a battery electrically connected to the watch movement and the alarm oscillator circuit, the improvements comprising: a. a middle frame attached to a side of said casing opposite said dial, said middle frame having a plurality of openings therethrough, one of said openings surrounding said battery, b. an irregular shape vibratory membrane attached to said middle frame so as to cover the unoccupied opening in said frame, said irregular shape vibratory membrane being located laterally adjacent to said battery; c. means attached to said vibratory membrane and electrically connected to said electronic alarm oscillator circuit so as to cause said membrane to vibrate and emit an audible sound upon an electric input from said alarm oscillator circuit; d. a rear cover attached to said case adjacent to said vibratory membrane and spaced therefrom, said rear cover having an opening therethrough coaxially with said battery to enable the removal of said battery therethrough, the junction of said case and said rear cover defining at least one radial discharge opening to allow passage of the audible sound therethrough; and e. a battery cover removably attached to said rear cover to close said opening therethrough.