Compact electric door opener

Details Compact electric door opener Compact electric door opener

1981-07-06

1984-09-18

Moore, Richard E.

Closure fasteners

Keepers

With movable dog, catch or striker

292DIG53, E05C 1900

Patent

active

044719833

ABSTRACT:
This disclosure depicts a novel compact electric door opener for use in a hollow metal door frame having an opening and two tabs adjacent the opening. The electric door opener comprises a housing, a solenoid contained within the housing, a conical spring attached to the solenoid, an armature pivotally attached to the housing and in contact with the conical spring. The armature has a latch engaging surface. A pivotable latch is attached to the housing and a portion of the latch contacts the latch engaging surface of the armature. The latch is restrained from pivoting by the armature except when the solenoid is energized. A temporary means for holding the housing and a means for securing the housing to the tabs of the door frame is also provided. The temporary means for holding the housing is removed after the means for securing has attached the housing to the tabs of the door frame.

REFERENCES:
patent: 3211850 (1965-10-01), Toepfer
patent: 3504511 (1970-04-01), Allen
patent: 3749435 (1973-07-01), Balzano
patent: 3819215 (1974-06-01), Fuss
patent: 3910617 (1975-10-01), Scalza et al.
patent: 4211443 (1980-07-01), Butts et al.

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