Motor bell alarm

Details Motor bell alarm Motor bell alarm

1990-01-26

1990-11-13

Orsino, Joseph A.

Communications: electrical

Audible indication

Percussion-type sound producer

340392, 340398, 340402, 116157, 116159, 116160, G08B 300, G10K 1064, G10K 100

Patent

active

049704907

ABSTRACT:
A motor bell alarm comprises an electric motor and a linkage by which the rotational motion generated by an electric motor is translated to a longitudinal oscillating motion so as to cause a plunger coupled to the linkage to cyclically strike a shell, thereby creating a ringing sound. The volume and clarity of the ringing sound are enhanced by minimizing the time in which the plunger is in contact with the shell and by minimizing the rest mass that is in contact with the shell as it is struck by interposing a lost-motion connection between the plunger and the linkage to the electric motor, whereby upon and after striking the shell the plunger is mechanically uncoupled from the lever.

REFERENCES:
patent: 4153898 (1979-05-01), Larime
patent: 4286259 (1981-08-01), Ishii
patent: 4360800 (1982-11-01), Ishii

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