Buzzer

Details Buzzer Buzzer

1976-10-06

1977-09-20

Pitts, Harold I.

Communications: electrical

Audible indication

Diaphragm

340396, 340392, G01K 912

Patent

active

040500667

ABSTRACT:
A buzzer comprises an annular magnet, a coil disposed at the inside of the magnet, a vibration plate disposed above said magnet, a core inserted into the central opening of said coil and with its one end facing said vibration plate, a case and a yoke. Said magnet said vibration plate and said yoke are held by the magnetic attraction of the magnet.

REFERENCES:
patent: 3950744 (1976-04-01), Stephens

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