Closure fasteners – Braces – Portable
Patent
1988-09-30
1989-11-28
Moore, Richard E.
Closure fasteners
Braces
Portable
E05C 1918
Patent
active
048832979
ABSTRACT:
An inclined security brace for a door extends from the door knob to the floor and has telescoping parts that are extended and retracted by an electric motor. A horizontal arm keeps the brace in an inclined position when the brace is retracted. The motor is activated by radio controls having a circuit that controls the direction of retraction or extension. When the extension operation causes the brace to engage the floor an over load of the electronic motor occur and this over load is sensed by the circuit to stop the motor. When the retraction operation results in the telescoping parts reaching a mechanical stop the over load is again sensed by the circuit to stop the motor. Preferably the same transmitted signal is used for retraction and extension and a flip-flop in the circuit automatically alternates extension and retraction. The brace prevents entry to a room by pass keys.
REFERENCES:
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patent: 3124382 (1964-03-01), Strother
patent: 4019765 (1977-04-01), Nichola
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patent: 4456291 (1984-06-01), Brogie
patent: 4483558 (1984-11-01), Van Meter
patent: 4602255 (1986-07-01), Kitagawa et al.
patent: 4607253 (1986-08-01), Wooten et al.
Brelsford Harry W.
Moore Richard E.
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