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US 4,284,857 AGranted
Tone generator
AssigneeLectron Products, Inc.
InventorsMichael Slavin, Irvin B. Rea, George S. Todd
Life of this patent
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AssigneeLectron Products, Inc.
InventorsMichael Slavin, Irvin B. Rea, George S. Todd
Estimating the term…
An electromagnetic tone generator having a pole piece adapted to be mounted on a circuit board and to be incorporated in the circuitry thereof, an electromagnetic coil sub-assembly adapted for mounting on a coil carrying portion of the pole piece and to be separately fastened electrically and physically to the circuit board, and a sound transducer sub-assembly including a housing defining a sound cavity and a diaphragm closing the latter and held by a retainer ring detachably fastened to the housing, the sound transducer sub-assembly adapted to be tested for sound prior to assembly and for mounting on and detachable connection with the pole piece, the retainer ring being detachably fastened to the housing so that in the disassembled condition of the sound transducer sub-assembly the ring is readily removable for replacement or servicing of critical parts of the sub-assembly, and in the assembled condition of the sound transducer sub-assembly the latter is held by the pole piece spaced from the circuit board to accommodate electrical components of the latter and with the diaphragm precisely spaced from the coil carrying portion of the pole piece.
In a tone generator of the type having
In a tone generator of the type having a casing provided with a sound cavity and a diaphragm mounted for free vibratory movement across and closing said cavity, the improvement comprising
A tone generator comprising
A tone generator comprising
Dependencies are inferred from the claim text.