Latch or lock set and method of manufacture thereof

Details Latch or lock set and method of manufacture thereof Latch or lock set and method of manufacture thereof

1975-04-30

1977-08-16

Moore, Richard E.

Closure fasteners

Knobs

E05C 1900

Patent

active

040422682

ABSTRACT:
Manufacture of latch or lock set by cutting, from an extrusion of indefinite length, a portion sufficient to constitute a door lever; creating a rectangular-section barrel at one end of said portion, said barrel having a right-cylindrical recess therein; placing a square-section hollow insert in said recess, said insert having laterally directed tongues; assembling said door with a back plate so that the barrel extends through the back plate; connecting a lever-biasing spring both to the barrel and to the back plate; and securing the lever to the back plate by means of a combined D-plate and locking washer which has an aperture therein which is complementary to the barrel section, said D-plate locking washer also having lugs angled to permit them to slide along the barrel in one direction and to cause them to dig into the barrel to prevent movement in the opposite direction along the barrel.

REFERENCES:
patent: 3345103 (1967-10-01), Parkin et al.

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