Locks – Special application – For closures
Patent
1990-03-22
1991-09-03
Wolfe, Robert L.
Locks
Special application
For closures
70142, E05B 6312
Patent
active
050441817
ABSTRACT:
A dropbolt lock having a pair of dropbolts movable between knuckles is assembled on a formed steel assembly plate which is attached to a base plate, the assembly plate providing the spaced knuckles. A cam operator operates the dropbolts between true dead lock positions. On the inside of the lock, a cylinder lock or a thumb turn may be assembled by a single screw. The cover is provided with attachment screws which are concealed by the locking bolt when in locked position.
REFERENCES:
patent: 1065848 (1913-06-01), Segal
patent: 1922043 (1933-08-01), Hines
patent: 3545799 (1970-12-01), Gertsfeld
patent: 3768284 (1973-10-01), Kent et al.
patent: 4530223 (1985-07-01), Oliver
patent: 4617811 (1986-10-01), Roop
patent: 4635455 (1987-01-01), Oliver
patent: 4688409 (1987-08-01), Oliver et al.
patent: 4719774 (1988-01-01), Newman
patent: 4813250 (1989-03-01), Yeh
patent: 4918953 (1990-04-01), Newman
patent: 4961330 (1990-10-01), Evans
Segalock--Hines Key-System Brochure form The New England Lock & Hardware Co.
Medeco High Security Locks Brochure for the D-10 Series High Security Dropbolt.
Field Peter H.
Roop Stevie C.
Medeco Security Locks Inc.
Wolfe Robert L.
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