Knob attachment for door latch

Details Knob attachment for door latch Knob attachment for door latch

1976-08-09

1977-12-13

Frazier, Roy D.

Closure fasteners

Knob-attaching devices

29216915, 292DIG38, E05B 306

Patent

active

040625796

ABSTRACT:
A door latch makes use of moldable material for most of the individual parts with opposite roses adapted to interlock with each other and be held together with a single screw on the axial center line of the knobs and accessible from the outside. Prior to installation of the latch on the door each knob is subassembled with the corresponding rose by employment of an arcuate shoulder on an inner central portion of the knob which is rotated to a position of engagement with a complementary arcuate shoulder in the rose. Rotation inhibiting detents prevent accidental disassembly until the spindle is mounted in place and the spindle then locks the knob against disassembly as long as the latch remains mounted on the door.

REFERENCES:
patent: 325445 (1885-09-01), Regan
patent: 326920 (1885-09-01), Russell
patent: 538952 (1895-05-01), Donovan
patent: 542048 (1895-07-01), Giese
patent: 957837 (1910-05-01), Berry
patent: 1387888 (1921-08-01), Holt
patent: 2741502 (1956-04-01), Crandell
patent: 2764445 (1956-09-01), Cerf
patent: 3232653 (1966-02-01), Wilson
patent: 3580622 (1971-05-01), Morgan

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