Closure fasteners – Bolts – Sliding
Patent
1976-10-08
1978-01-31
Frazier, Roy D.
Closure fasteners
Bolts
Sliding
F05C 116
Patent
active
040712702
ABSTRACT:
A mortise lock operated by a two-directional inner knob and an outer lever handle has means within its case to limit rotation of the outer lever handle in one direction. An auxiliary hub spring also contained in the case and associated with the outer rollback hub provides additional yieldable resistance to rotation of the lever handle in said one direction to compensate for the movement of the lever handle which results from its radially offset center of gravity. The auxiliary hub spring also provides additional reactive torque to compensate for increased mechanical advantage attained through utilization of a lever handle.
REFERENCES:
patent: 606246 (1898-06-01), Russell
patent: 1564463 (1925-12-01), Best
patent: 1857684 (1932-05-01), Flynn
patent: 2262133 (1941-11-01), Blessin
patent: 3708191 (1973-11-01), Hegedus
patent: 3811717 (1974-05-01), Floyd et al.
Sargent and Company--Drawing No. 81-2516 Tab of 1-14-63.
Sargent and Company--Drawing No. 81-0249 of 5-20-68.
Sargent and Company--Drawing No. 81-2605 of 5-31-68.
Sargent and Company 8100 Series Parts Catalog of 6-66.
Sargent and Company--1965 Condensed Catalog, p. 11, Found in 1965, Sweet's Architectural File, Section 19e/sar.
Emhart Industries Inc.
Frazier Roy D.
Holko Thomas J.
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