Door knob construction

Details Door knob construction Door knob construction

1976-04-16

1977-10-11

Foss, J. Franklin

Locks

Special application

For control and machine elements

70370, 70451, 70461, 292347, 292352, E05B 6310, E05B 304

Patent

active

040528685

ABSTRACT:
A door knob is machined from solid stock to provide a tubular neck, an intermediate portion which is internally recessed to reduce its wall thickness, and a solid-section end portion having a large axial end opening which provides tool access for recessing the mid-portion and clears the pin tumbler lobe of a key-removable core mounted in the knob sleeve with its key plug concentric with the knob. The end opening has an axially-outward facing shoulder and an adjacent radially-inward opening groove. A knob locating, bevelled-edge ring lies against the shoulder with its edge partially closing the mouth of the groove. An end face member having a peripheral bevelled skirt is pressed into the end opening and against the edge of the ring so as to deform the skirt outward into the groove and thereby secure both the end face member and the ring in the knob. The end face member may have an opening for a core mounted in the knob sleeve, or for other usual knob accessories, or may completely close the end of the knob.

REFERENCES:
patent: 1938112 (1933-12-01), Schlage
patent: 2301751 (1942-11-01), Schlage
patent: 2719424 (1955-10-01), Rayburn
patent: 2848264 (1958-08-01), Lynch
patent: 2976073 (1961-03-01), Russell et al.
patent: 2998274 (1961-08-01), Russell
patent: 3077100 (1963-02-01), Gerlach
patent: 3096115 (1963-07-01), Patriquin et al.
patent: 3190091 (1965-06-01), Russell et al.
patent: 3413829 (1968-12-01), Russell

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