Solenoid operated doorbell

Details Solenoid operated doorbell Solenoid operated doorbell

1988-05-09

1989-09-05

Orsino, Joseph A.

Communications: electrical

Audible indication

Percussion-type sound producer

340384E, G08B 300

Patent

active

048642754

ABSTRACT:
Doorbell mechanism that employs only one solenoid to achieve both single tone and double tone operation. The solenoiod has a split coil with the full coil being employed for double tone operation and a portion of the coil being employed for single tone operation.

REFERENCES:
patent: 2290717 (1942-07-01), Swanson
patent: 2659074 (1953-11-01), Alexander
patent: 2820913 (1958-01-01), Christy
patent: 3246321 (1966-04-01), Doggart

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