Electric bell having a mechanism for supporting electromagnetic

Details Electric bell having a mechanism for supporting electromagnetic Electric bell having a mechanism for supporting electromagnetic

1997-08-25

1999-06-01

Lefkowitz, Edward

Communications: electrical

Audible indication

Electronic

3403921, 3403961, 3403982, 116148, G08B 300

Patent

active

059091690

ABSTRACT:
An electric bell includes a base having two walls extended upward from the central portion for forming a casing. The walls each includes an upper portion having one or more projections. Two spring leaves are secured on the base. An electromagnetic unit is engaged into the casing and engaged between the walls and retained in place by the projections. The electromagnetic unit includes a coil and a stem slidably engaged in the coil for allowing the stem to be driven by the coil to strike onto the spring leaves. The electromagnetic unit may be secured in place without additional tools and fasteners.

REFERENCES:
patent: 4912453 (1990-03-01), Aizawa et al.
patent: 4968971 (1990-11-01), Aizawa et al.

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