Composite window for a vehicle entrance door
AssigneeThe Boeing Company
InventorsRobert B. Hayes, Arturo Pompei
Life of this patent
Estimating the term…
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.
Claims5
A composite window for an entrance door of an airplane including at least one substantially air-tight door comprising:
- a. an outer pane of a transparent material and having two substantially parallel plane surfaces;
- b. an inner pane of a transparent material, said inner pane having a first surface facing said outer pane and spaced from said outer pane and being shaped to provide a concave negative lens having substantially the same area as said inner pane, and said inner pane having an opposite surface, at least a portion thereof forming a prism oriented to afford a view outside the airplane in a predetermined direction;
- and
- c. means for sealing at least said outer pane substantially air-tight to the door.
A composite window for an entrance door of an airplane including at least one substantially air-tight door comprising:
- a. an outer pane of a transparent material and having two substantially parallel plane surfaces;
- b. an inner pane of a transparent material, said inner pane having a first surface facing said outer pane and spaced from said outer pane, and said inner pane having an opposite surface, at least a portion thereof forming a prism extending over the entire area of said opposite surface and oriented with its broad base in a substantially downward direction oriented to afford a view outside the airplane in a predetermined direction;
- c. means for sealing at least said outer pane substantially air-tight to the door;
- and
- d. alignment means provided on said inner pane for orienting said prism in a predetermined slightly forward or slightly aft direction.
A composite window for an entrance door of an airplane including at least one substantially air-tight door comprising:
- a. an outer pane of a transparent material and having two substantially parallel plane surfaces;
- b. an inner pane of a transparent material, said inner pane having a first surface facing said outer pane and spaced from said outer pane, and said inner pane having an opposite surface, at least a portion thereof forming a prism oriented to afford a view outside the airplane in a predetermined direction;
- and
- c. means for sealing at least said outer pane substantially air-tight to the door;
- both of said panes being disc-shaped and having a circular outline.
A composite window for an entrance door of an airplane including at least one substantially air-tight door comprising:
- a. an outer pane of a transparent material and having two substantially parallel plane surfaces;
- b. an inner pane of a transparent material, said inner pane having a first surface facing said outer pane and spaced from said outer pane, and said inner pane having an opposite surface, at least a portion thereof forming a prism oriented to afford a view outside the airplane in a predetermined direction;
- and
- c. means for sealing at least said outer pane substantially air-tight to the door;
- both of said panes having a substantially elongated and oval outline.
A composite window for an entrance door of an airplane including at least one substantially air-tight door comprising:
- a. an outer pane of a transparent material and having two substantially parallel plane surfaces;
- b. an inner pane of a transparent material, said inner pane having a first surface facing said outer pane and spaced from said outer pane, and said inner pane having an opposite surface, at least a portion thereof forming a prism oriented to afford a view outside the airplane in a predetermined direction;
- and
- c. means for sealing at least said outer pane substantially air-tight to the door;
- said inner pane having a first surface shaped to provide a concave negative lens, said lens having substantially the same area as does said inner pane;
- said prism having an index of refraction of about 1.49 and an inclination of substantially 28 degrees and having a line of sight making an angle of approximately 45.degree. with the normal to said opposite surface and providing an angle measured between a normal to said parallel plane surface and the ray from said line of sight to the outside of approximately 73 degrees.
Dependencies are inferred from the claim text.