Locks – Operating mechanism – Using a powered device
Patent
1987-12-28
1990-02-20
Smith, Gary L.
Locks
Operating mechanism
Using a powered device
70214, 70207, 70215, 70285, E05B 4900
Patent
active
049015451
ABSTRACT:
An electromechanical locking device completely contained within a doorknob which can be a part of a usual lockset or retrofitted on an existing lockset which requires entry of an access code or entry of both an access code and use of a mechanical key for operating the lock. The code is entered on a keypad exposed on the knob and supplies a signal to a computer powered by batteries. A correct match of the input code to a code stored in the computer will actuate a motor operated cam to release a mechanical interlocking pin enabling the lock cylinder to be rotated to the unlocked position. Both visual and audible signals may be provided in the doorknob as to the power level of the batteries and ready condition of the lock. The mechanical interlock pin is disengaged automatically from the lock cylinder upon the power level of the batteries dropping to a predetermined level requiring only mechanical key operation of the lock.
REFERENCES:
patent: 1238134 (1917-08-01), Greif
patent: 1270372 (1918-06-01), Breirather
patent: 1530861 (1925-03-01), Standen
patent: 1695518 (1928-12-01), Watson
patent: 2059678 (1936-11-01), Briggs
patent: 2449711 (1948-09-01), Milligan
patent: 2700886 (1955-02-01), Welch
patent: 3123995 (1964-03-01), Russell et al.
patent: 3395557 (1968-08-01), Berkowitz
patent: 3447347 (1969-06-01), Kawamura
patent: 3494157 (1970-02-01), Coker, Jr.
patent: 3529454 (1970-09-01), Fish
patent: 3616667 (1971-11-01), McGourty
patent: 3670538 (1972-06-01), Curry
patent: 3764859 (1973-10-01), Wood et al.
patent: 3787812 (1974-01-01), Armstrong
patent: 3894417 (1975-07-01), Taniyama
patent: 4027508 (1977-06-01), McGourty
patent: 4148092 (1979-04-01), Martin
patent: 4308732 (1982-01-01), Hau
patent: 4393672 (1983-07-01), Gelhard
patent: 4452059 (1984-06-01), Sornes
patent: 4458512 (1984-07-01), Gelhard
patent: 4637237 (1987-01-01), Witkowski et al.
patent: 4656851 (1987-04-01), Leek et al.
patent: 4745784 (1988-05-01), Gartner
patent: 4748833 (1988-06-01), Nagasawa
patent: 4763937 (1988-08-01), Sittnick, Jr. et al.
patent: 4770012 (1988-09-01), Johansson et al.
patent: 4799371 (1989-01-01), Duncan
Bacon Michael E.
Keith Roger C.
Morneweck Scott W.
Simon Arvin B.
Dino Suzanne L.
Rising Star Technologies (a partnership)
Smith Gary L.
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