|5457437||Sparking free circuit of electric horn|
An electric horn which comprises a diaphragm held at its peripheral portion in a housing of the horn and having an armature attached to a middle portion thereof; an electromagnet having a coil and disposed adjacent to the armature in an opposed relationsh...
|4968971||Method of spot welding parts of an electromagnetic bell unit|
A miniaturized electromagnetic bell unit suitable for use with an alarm clock and the like is provided. The bell unit of the present invention is characterized in that it is miniaturized in such a way that a yoke to which a coil and a bell hammer are atta...
A warning buzzer having an armature arranged to strike the wall of the cavity formed by the buzzer housing to increase the sound emitted thereby. The buzzer includes terminals molded in a base with one terminal having a coil core and magnetic return leg f...