Power operated door guard

Closure fasteners – Braces – Portable

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

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:
patent: 2709615 (1955-05-01), Barnes, Jr. et al.
patent: 2898140 (1959-08-01), Gislason
patent: 3124382 (1964-03-01), Strother
patent: 4019765 (1977-04-01), Nichola
patent: 4199179 (1980-04-01), Curry
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.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Power operated door guard does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Power operated door guard, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power operated door guard will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-578208

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.