The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 1988
Filed:
May. 22, 1986
Martin Thaler, Chicago, IL (US);
Alan G Lewis, West Linn, OR (US);
David M Gresham, Chicago, IL (US);
View-Master Ideal Group, Inc., Beaverton, OR (US);
Abstract
A stereoscopic viewer comprises a housing having an advancing plate for supporting and advancing a disc-shaped carrying card for stereo images which are viewed through a pair of eyepieces in the housing. A trigger oscillates the plate to incrementally rotate the card and position sequential pairs of images in the viewing axis of the eyepieces. The trigger includes a depressible actuator vertically projecting through a top surface of the viewer, as it is held for viewing. The trigger comprises a cylindrical actuator portion projecting through the top surface of the housing, and a leg depending from the actuator portion which engages the advancing plate to oscillate it as the trigger is depressed. As the plate oscillates in a forward direction, a flat front face of a pawl on the plate engages a radial slot on the disc to rotate it. The pawl is slightly inclined in the direction of advance of the card to help hold the card flat against the plate during incremental advancement. A rear element of the viewer is completely translucent to allow a greater amount of light into the interior of the housing and permit viewing of the mechanical actuation of the viewer.