Composite window for a vehicle entrance door

Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils

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Details

2441293, G02B 718, B64C 114

Patent

active

043581820

ABSTRACT:
A composite window for a vehicle entrance door includes means for affording a downward view while the door is closed. The window includes an outer pane having two substantially parallel plane surfaces, an inner pane having a plane surface facing the outer pane and spaced therefrom. The opposite surface is formed with a prism which extends either partly or entirely over its surface. Additionally, the opposite surface of the inner pane may be provided with a concave surface forming a concave lens which enhances the effect of the prism.

REFERENCES:
patent: 650209 (1900-05-01), White
patent: 1678479 (1928-07-01), Patten et al.
patent: 1683951 (1938-09-01), Buttron
patent: 1808208 (1931-06-01), David
patent: 1883296 (1932-10-01), Johnson
patent: 1907800 (1933-05-01), Harrington
patent: 2708136 (1955-05-01), Norris
patent: 3038756 (0000-01-01), Heimer

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