Doorbar system

Details Doorbar system Doorbar system

1975-05-21

1976-09-14

Nunberg, Casmir A.

Closure fasteners

Clamps

Ring

70 19, 220315, 292259R, 292260, 292DIG24, 292DIG53, 292DIG54, E05B 1300, E05C 1302, E05C 1918

Patent

active

039803287

ABSTRACT:
Improvement in a doorbar device for barring the door of a doorway, the doorway having doorjambs and a door therefor, the door having a doorknob, the doorbar device comprising a doorknob constructed to be affixed to the doorjambs of the doorway to extend across and bar the door from being opened, the doorbar device also comprising a mechanism for applying a force upon the doorknob to prevent turning thereof.

REFERENCES:
patent: 284961 (1883-09-01), Hill
patent: 327373 (1885-09-01), Yarnall et al.
patent: 390130 (1888-09-01), Longenecker
patent: 1163478 (1915-12-01), Snow
patent: 2331150 (1943-10-01), Whiting

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