A transparency viewing device includes a floor supported stand which is vertically adjustable to locate a horizontal arm and a housing thereon at the desired elevation. The housing within which the transparency or color slide is temporarily positioned includes a light diffuser to illuminate the slide which is viewed through a housing supported lens. A reflector is carried by a housing platform in a manner permitting in a wide range of universal adjustment for purposes of reflecting available lig...

Apparatus for viewing superposed stereographic images each presented in a different color, comprising a color television receiver having a dual dichroic polarizing filter over the viewing screen, and a pair of spectacles having orthogonally polarized lenses for viewing the screen through the filter.

A viewing screen, as for use in rear projection television and the like, is provided with enhanced contrast by selectively placing dark lines upon the viewer surface. The dark lines can be placed: orthogonal to lenticules in the viewer surface; in the grooves between, and forming, the lenticules; or both.

Apparatus for viewing the interior of a working chimney so that smoke patterns and the condition of the chimney walls can be continually monitored without the need of discontinuing the operation of a connected stove. The viewing apparatus is rendered airtight so that a fire extinguisher operably connected thereto can fire dry chemicals directly into the chimney in the event a chimney fire is detected.

There is disclosed an image orientation and projection system for use with stereoscopic viewing and projection systems. The preferred embodiment utilizes a stereoscopic viewing system of one or two prisms, preferably each having a plano face and an opposite face bearing a plurality of spaced-apart, straight and parallel V-grooves. Reflective surfaces are positioned in relation to said prisms to permit the employment of left and right stereoscopic images in their normal (left - right) and unrever...

A lockable control box for a television is designed to have the television plug attached to a timer. A programmable control panel is used to regulate the hours the television is able to be turned on, and the control box comes equipped with three specially designed security features. The first of these is a plug lock which prevents electrical plugs from being disconnected from the control unit. Secondly, a lockable door is provided so as to prevent the unit from being reprogrammed except by a per...

A periscope structure is mounted to a door assembly to accommodate individuals restricted relative to standing, wherein the periscope structure is vertically adjustable and is arranged for ease of mounting to the associated door structure employing a mounting housing organization.

An angular viewing device is taught which enables the viewer to see, while looking downward, objects and scenery in front of him, to the right and left and also above and below the horizontal plane of the viewer's eyes. The viewing device and all of its reflective surfaces or mirrors are housed in a casing which is waterproof and also highly aerodynamically wind-resistant. The device is primarily for use as an optical visual aid for mounting on the handle bars of bicycles for forward vision purp...

An optical viewing system is described which permits viewing through a microscope at a more comfortable and advantageous angle. The device of the invention attaches between the body of the microscope and the eye piece and can be either rigid in its configuration or adjustable to permit varying angles of view. Various optical systems ca be employed within the viewing device of the invention to preserve optical integrity.

An oblique viewing system is attachable to a microscope to selectively obtain a perpendicular view (along the optical axis of the microscope) and oblique views of surfaces of objects under inspection. The attachment is connected to the microscope's objective end by a coupling on a housing containing the viewing system. The system includes a folding mirror and an oblique viewing mirror, spaced from the folding mirror and having its reflecting surface facing the object under inspection. A latching...