Daniel R. Smith
Electrician at Santa Cruz Blvd, Santa Barbara, CA
License number
Colorado 12068
Issued Date
Aug 19, 1994
Renew Date
Mar 1, 2007
Expiration Date
Feb 28, 2009
Type
Journeyman Electrician
Address
Address
323 Santa Cruz Blvd, Santa Barbara, CA 93109
Professional information
Power Operated Door Guard
US Patent:
4883297, Nov 28, 1989
Filed:
Sep 30, 1988
Appl. No.:
7/251316
Inventors:
Daniel R. Smith - Santa Barbara CA
International Classification:
E05C 1918
US Classification:
292339
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.