Modular buzzer with diaphragm molded into housing

Claim 1

A buzzer for providing an audible warning, comprising a housing including a rectangular base corresponding in size and shape to a standard dual-in-line electronic package configuration, said housing having side walls hermetically sealed to and extending from said base defining an elongated enclosure and a thin stiff top wall molded and sealed to said side walls opposite said base in spaced relation to said base, an U-shaped armature of magnetic material such as iron, said base having a recess receiving the bottom of said armature with the legs of said armature projecting upward within said housing, a striker arm secured to one of said legs and extending lengthwise of said housing directly beneath said top wall to a location above the other said leg, said arm being arranged to oscillate toward and away from said other leg and to strike said top wall to produce an audible sound, electronic oscillator circuit means including a board fitted over the bottom of said armature and about at least said other leg of said armature, said circuit means also comprising electronic components supported on said board including induction coils surrounding said other leg to induce current in said armature to cause oscillation of said arm, mounting pins projecting from said base according to standard dual-in-line package configuration, some of said pins being connected to said circuit means internally of said housing, and said pins being fastened to said board holding said armature in position between said base and said board.