Abstract: An armature, a method for producing the armature and a mold for molding the same are so configured that the coil pitch of each of phase coils is set to a value of 125% or less of the pole pitch, the gap between the respective phase coils of any one of layers is so disposed as to face the intenral space of each of the phase coils of the other layer being contact with that layer, and the registering face of the mold for molding the periphery of the armature is so formed as to be parallel with the axial direciton of the armature.

Abstract: A mold for forming coreless armatures having an upper mold and a lower mold. The lower mold has a mold cavity for receiving a shaft capable of supporting windings of a coreless armature. An elastic ring plate is placed between the upper and lower molds and is adapted for being compressed therebetween. The elastic ring plate is further adapted to contact terminal ends of the windings as they extend outside of the mold cavity, and to seal said mold cavity with the terminal ends extending therefrom.

Abstract: An armature, a method for producing the armature and a mold for molding the same are so configured that the coil pitch of each of phase coils is set to a value of 125% or less of the pole pitch, the gap between the respective phase coils of any one of layers is so disposed as to face the intenral space of each of the phase coils of the other layer being contact with that layer, and the registering face of the mold for molding the periphery of the armature is so formed as to be parallel with the axial direction of the armature.

Abstract: A microphone device arranged to be built in a superminiature tape recorder is disclosed. The device includes a casing portion of a tape recorder, a face member fixed on the casing portion and having a plurality of sound inlet holes, a first metallic support member supported by the face member for isolating vibrations of relatively low frequency, a second support member supported by the first support member for isolating vibrations of relatively high frequency, and a microphone body supported by the second support member in operative relation to the face member. A pair of bare conductive wires lead out of the microphone body, and each has a diameter of 0.15 mm or less.

Abstract: A connecting device for use in a tape recorder comprises a plug member arranged to be connected to an external load and includes a conductive sleeve, a conductive tip provided therein and a movable pin projecting at the end portion of the tip. The device also includes a jack member provided on a housing of an electrical apparatus, including a contact segment provided to contact with the sleeve of the plug tip, switching contact segments provided to separate from each other by action of the tip, and another contact segment provided to contact with the pin so as to supply source voltage to the external load through the pin of the plug member.

Abstract: A bearing device of a capstan shaft for use in a tape recorder including a capstan shaft, a bearing member for supporting the capstan shaft, and a flywheel secured to the capstan shaft, a part of the secured portion being positioned in a tape cassette.