Closure fasteners – Bolts – Sliding and rotary
Patent
1977-02-22
1978-07-25
Frazier, Roy D.
Closure fasteners
Bolts
Sliding and rotary
49450, 292147, 292288, 292DIG47, E05C 502, E05D 1306
Patent
active
041025458
ABSTRACT:
A safe and tamper-resistant lock assembly for sliding glass doors and the like for securely locking a slidable door in a closed or partially opened position. The lock assembly includes a specially configured bracket which is mounted upon the stationary frame assembly of the door unit. The bracket has an inverted J-shaped channel and an elongated wall defining a plurality of apertures including one aperture which is positioned to overlie an aperture in the slidable frame of the door when the door is in a closed position and another aperture which is positioned to overlie the aperture in the slidable frame when the door is in a partially opened position. A specially configured locking key is provided with a cylindrical shank having an arcuate locking cam for lockably engaging the inverted J-shaped channel of the bracket when the shank is inserted into the aperture in the slidable frame and into one of the apertures in the bracket. Desirably, a specially designed impact-resistant grommet is provided for snap-fitting engagement into the aperture in the slidable frame of the door.
REFERENCES:
patent: 74718 (1868-02-01), Piersons
patent: 368595 (1887-08-01), King
patent: 447068 (1891-02-01), Dixon
patent: 579246 (1897-03-01), Wallenstein
patent: 698742 (1902-04-01), Scharnweber
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patent: 1244725 (1917-10-01), Gadke
patent: 1622791 (1927-03-01), Lang
patent: 1760398 (1930-05-01), Coleman
patent: 2735707 (1956-02-01), Sylvan
patent: 3869887 (1975-03-01), Zeit
patent: 3930678 (1976-01-01), Alexander
Elgin-Macor, Inc.
Frazier Roy D.
Holke Thomas J.
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