Locks – Special application – For closures
Patent
1976-11-05
1978-01-17
Frazier, Roy D.
Locks
Special application
For closures
70403, 292138, 292244, 292288, 292DIG46, E05B 6508, E05C 1918
Patent
active
040685063
ABSTRACT:
A hidden or concealed lock for sliding windows, door panels and the like, employing a concealed hollow tubular locking sleeve that is positioned entirely inside of an aligned opening passing through the interior frame of one of said windows and into the frame of the other window. The locking sleeve is manipulated into and out of locking position by a small rod shaped key member that is coaxially insertable into the locking sleeve from outside the window after passing through the small opening in the window frame. Both the locking and key members and openings are made small and unobstrusive; and are located for concealment in differing locations. These features prevent an unauthorized user from either locating the lock, determining its mode of operation; or unlocking the windows or panels without access to the special key.
REFERENCES:
patent: 1050692 (1913-01-01), Resch
patent: 1461554 (1923-07-01), Raffay
patent: 1580611 (1926-04-01), Kirkpatrick
patent: 1632482 (1927-06-01), Kroells
patent: 1897196 (1933-02-01), Hunt
patent: 2098048 (1937-11-01), Kistner
patent: 2120788 (1938-06-01), Riccelli
patent: 2537049 (1951-01-01), Glatt
patent: 3288510 (1966-11-01), Gough et al.
patent: 3642315 (1972-02-01), Alpern
Frazier Roy D.
Holko Thomas J.
Levine Alfred B.
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