Security viewing device

Details Security viewing device Security viewing device

1975-05-05

1976-08-10

Corbin, John K.

350174, G02B 2504

Patent

active

039738353

ABSTRACT:
A security viewing device which provides a viewer on one side of a door with a view of a caller whether he is standing directly outside the door or concealing himself to one side. The device includes a housing in which is mounted a stationary rotating periscope having an eye piece for the user at one end. The opposite end of the periscope is provided with two viewing ports facing in axial and radial directions. An inclined one way reflecting surface is mounted in the periscope adjacent the radial viewing port. The periscope with the two viewing ports end is enclosed in a clear plastic bubble with a portion of its top (northern) inner side darkened in opaque black. When the radial port is positioned upward or facing north, the user looks straight ahead through the one way reflecting surface and the axial viewing port at the caller. If the caller has stepped to one side, the periscope is rotated clockwise or counter clockwise until the radial viewing port clears the darkened area of the bubble so that the caller may be seen through the radial viewing port via his reflection in the inclined mirror.

REFERENCES:
patent: 2262203 (1941-11-01), Redstone et al.
patent: 3514188 (1970-05-01), Blosse et al.
patent: 3910676 (1975-10-01), Fojtik et al.

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