Abstract An electrically operated sound generator includes a casing housing a solenoid. A fixed contact is positioned within the casing and is engageable by a movable contact carried by the armature of the solenoid. The fixed and movable contacts are in the energizing circuit of the solenoid, so that when a current is supplied to the sound generator the armature of the solenoid is caused to vibrate, as the energizing circuit of the solenoid is made and broken through the fixed and movable contacts, thereby generating sound. The fixed contact is carried by a deformable metal strip one end of which projects from the casing of the sound generator. In order to effect tuning of the sound generator the projecting end of the strip is moved to deform the strip to alter the position of the fixed contacts relative to the solenoid.
An electrically operated sound generator including a casing, a solenoid housed within the casing and including an armature, a deformable metal strip extending within the casing, a fixed electrical contact carried by said deformable metal strip, a movable electrical contact movable with said armature, means connecting the fixed and movable contacts in circuit with the solenoid, so that when electrical current is supplied to the generator the armature is caused to vibrate as the circuit of the solenoid is made and broken, thereby generating sound, and, said deformable metal strip including a portion which projects from the casing so as to facilitate deformation of said metal strip to alter the position of said fixed contacts, and thereby effect tuning of the sound generator.
Claim 2
Dependent Claim
123 words
An electrically operated sound generator including a casing, a solenoid housed within the casing and including an armature, a deformable metal strip extending within the casing, a fixed electrical contact carried by said deformable metal strip, a movable electrical contact movable with said armature, means connecting the fixed and movable contacts in circuit with the solenoid, so that when electrical current is supplied to the generator the armature is caused to vibrate as the circuit of the solenoid is made and broken, thereby generating sound, and, said deformable metal strip including a portion which projects from the casing so as to facilitate deformation of said metal strip to alter the position of said fixed contacts, and thereby effect tuning of the sound generator.
Claim 3
Dependent Claim
32 words
A sound generator as claimed in claim 1 wherein the end of the strip remote from said projecting portion is shaped to define an electrical terminal on the exterior of the casing.