Door with a shutter device

Details Door with a shutter device Door with a shutter device

1985-07-22

1987-02-24

Downey, Kenneth

Movable or removable closures

Registerable opening in facially opposed closure and barrier

49171, E06B 702

Patent

active

046446877

ABSTRACT:
A door with shutter device, having a door panel provided with a plurality of through holes, and a shutter panel moveably disposed to overlap the door panel, the shutter panel having a plurality of through holes of the same size, configuration and arrangement as the through holes of the door panel. The shutter panel is urged by a spring to remain at a closed position where the through holes of the shutter panel are out of alignment with the through holes of the door panel. Operating means is provided to selectively move the shutter panel from the closed position to an open position where the through holes of the shutter panel are aligned with the through holes of the door panel so that one can see the object or person at the otherside of the door without opening the door, through the through holes.

REFERENCES:
patent: 374105 (1887-11-01), Wilson
patent: 1613913 (1927-01-01), Snyder
patent: 3946523 (1976-03-01), Hebda

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