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Title: US4789220: Stereoscopic print viewer
[ Derwent Title ]

Country: US United States of America

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7 pages

Inventor: Kinnard, Wolcott; Wauwatosa, WI 53226

Assignee: None

Published / Filed: 1988-12-06 / 1987-04-24

Application Number: US1987000041989

IPC Code: Advanced: G02B 27/22;
Core: more...
IPC-7: G02B 27/04; G02B 27/22;

U.S. Class: Current: 359/473; 359/474; 359/476; 359/477; 359/817;
Original: 350/139; 350/140; 350/142; 350/143; 350/250;

Field of Search: 350/139,140,142,143,133,130,250

Priority Number:
1987-04-24  US1987000041989

Abstract: The improved stereoscopic print viewer provides a simple interoccular adjustment to permit maximum comfortable magnification. A new method of focusing and holding the prints gives minimum viewer size. A variable focus adjustment automatically locks in place. The method of holding the prints positions them in close optical alignment, and requires minimum size. Prints are provided with a notch mating with a boss in the print holder. Special print borders are provided for an improved stereoscopic "window". The lenses follow the optical system devised by Oliver Wendall Holmes, but fold compactly together when not in use, with each lens on a pivot with means to index it properly into a viewing position. Each lens can also be indexed further to provide a hand held magnifier with the power of one lens, or, by indexing the other lens to a matching position, twice the magnifying power is obtained. The entire assembly is mounted on a center plate which positions and holds the viewer elements and which acts as a light baffle to separate the stereoscopic pairs in viewing.

Primary / Asst. Examiners: Henry, Jon W.;

INPADOC Legal Status: Show legal status actions

Family: None

First Claim:
Show all 10 claims
I claim:     1. In a stereoscopic print viewer, a pair of magnifying lenses movably mounted to a structure, a center plate positioned between said viewer lenses to hold said structure, a means to move said lenses to fold flat upon said centerplate, a means to unfold said lenses back into viewing position, a means for holding a stereoscopic print pair in position to be viewed through said lenses, and a means to retract into said structure said means for holding said stereoscopic print pairs.

Background / Summary: Show background / summary

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Description: Show description

Forward References: Show 5 U.S. patent(s) that reference this one

U.S. References: Go to Result Set: All U.S. references   |  Forward references (5)   |   Backward references (6)   |   Citation Link

Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 3pp US774245  1904-11 Hermann   COLLAPSIBLE STEREOSCOPE.
Get PDF - 9pp US1194057* 1916-08 Murphy    
Get PDF - 6pp US1197679  1916-09 Stern   STEREOSCOPE.
Get PDF - 8pp US1257327  1918-02 Disney   STEREOSCOPE.
Get PDF - 3pp US1392327* 1921-10 Hattersley    
Get PDF - 5pp US2621562* 1952-12 Stone    
  * some details unavailable
Foreign References: None

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