The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 20, 1976
Filed:
Jan. 15, 1975
Philip H Haselton, Short Hills, NJ (US);
Frederick W Geils, Fair Lawn, NJ (US);
Detex Corporation, New York, NY (US);
Abstract
There is disclosed a latchbolt assembly which replaces conventional rectilinear latchbolt movement with dual direction swinging movement to reduce binding forces and which uses two independently operable dead latches in association with the dual swinging motions of the latchbolt. To facilitate release, as by key or panic bar actuation, the load of the latchbolt mass and friction is substantially eliminated by coupling the release system to one of the dead latches and thereafter utilizing camming action derived from the opening of the door to swing the latchbolt out of its keeper. Thus hard pressure against the door will not hamper the release. The second dead latch is operated by a latch feeler finger which frees the latchbolt only when the door is open thereby to facilitate relatching by swinging into the keeper as the door closes.