Electrical/mechanical access control systems and methods

Details Electrical/mechanical access control systems and methods Electrical/mechanical access control systems and methods

1995-06-07

1998-10-20

Lindsey, Rodney M.

Locks

Operating mechanism

Using a powered device

70263, 70279, E05B 4900

Patent

active

058230270

ABSTRACT:
A retrofit electromechanical door knob assembly is adapted to fit within an aperture in a door in place of a conventional mechanical lock assembly. The retrofit door knob assembly is similar in appearance to a conventional door handle assembly, but includes a motor coupled to a latch, and suitable electrical and mechanical key inserts for receiving separate electrical and mechanical keys. Either a mechanical or an electrical key can unlock the latch. The electrical key insert includes a data probe within the handle for receiving the electrical key and a means for gripping an electronic key to allow a user to turn the handle with the key after the latch is unlocked by the motor, thereby withdrawing the latch.

REFERENCES:
patent: 4712398 (1987-12-01), Clarkson
patent: 4727369 (1988-02-01), Rode
patent: 4833465 (1989-05-01), Abend
patent: 4922736 (1990-05-01), Tanaka
patent: 5035450 (1991-07-01), Muller
patent: 5219386 (1993-06-01), Kletzmaier
patent: 5337043 (1994-08-01), Gokcebay
patent: 5437174 (1995-08-01), Aydin
patent: 5474342 (1995-12-01), Smith
patent: 5484180 (1996-01-01), Helmar
patent: 5490699 (1996-02-01), Uyeda

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