Safety knob

Details Safety knob Safety knob

1978-12-13

1981-03-03

Moore, Richard E.

Closure fasteners

Knob-attaching devices

Swinging

E05C 2100

Patent

active

042536901

ABSTRACT:
A safety knob for preventing unauthorized persons, such as small children, from operating the knobs in a given direction; but enabling even the unauthorized persons to operate the knob in the opposite direction.

REFERENCES:
patent: 401003 (1889-04-01), Burns
patent: 711838 (1902-10-01), Fader
patent: 962448 (1910-06-01), Miller
patent: 1516152 (1924-11-01), Dumont
patent: 3428351 (1969-02-01), Volk

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