Safety dead-bolt lock

Details Safety dead-bolt lock Safety dead-bolt lock

1983-11-07

1986-03-11

Moore, Richard E.

Closure fasteners

Operators with knobs or handles

70214, 292347, E05C 1300

Patent

active

045751412

ABSTRACT:
A safety dead-bolt lock adapted to be mounted on a door. The safety dead-bolt lock has a bolt and a rotatable bolt activator. A safety knob is adapted to rotate the bolt activator and thus extend and withdraw the bolt. The safety knob has a rotatable member engaged with the bolt activator and a stationary member adapted to be fixed to the door. A disengageable interlocking mechanism is adapted to prevent rotation of the rotatable member relative to the stationary member. Depressable tabs mounted in the rotatable member disengage the interlocking mechanism when depressed, allowing the rotatable member to be turned to withdraw and extend the bolt. The tabs are in such an arrangement and are so oriented that they are conveniently presented toward the hand of a user located on the side of the door on which the stationary member is mounted, but the hand of a person reaching from the other side of the door cannot readily assume the position necessary to depress the tabs.

REFERENCES:
patent: 793087 (1905-06-01), McVitty
patent: 1705340 (1929-03-01), Robert
patent: 2000111 (1935-05-01), Weis

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