Abstract: An apparatus and method for properly aligning, coupling and cropping two stereoscopically complementary pictures which are positioned one above the other. Alignment and holding apparatus includes a base for supporting two stereoscopically complementary pictures, a detachable joining strip with two areas of pressure sensitive adhesive for joining two pictures which is placed in a fixed planar shield with a pair of opposed guide flaps with one non stick surface for holding the joining strip, and a flat, flexible, transparent alignment sheet with grid markings which overlays the pictures and includes cut out areas for manually accessing the pictures for adjusting one picture relative to the other.

Abstract: A stereoscope for viewing two stereoscopically complementary pictures which are positioned one above the other. The stereoscope includes a housing which has left and right front openings at the front of the housing and upper and lower rear openings at the back of the housing. A passageway leads from the left front opening to one of the rear openings and from the right front opening to the other rear opening. Optical elements, such as mirrors, are located within the passageways for directing a light image from one of the pictures through one of the rear openings to the left front opening and for directing a light image from the other picture through the other rear opening to the right front opening so that the observer sees the two images as superimposed and perceives the superimposed images as a single 3-dimensional picture.

Abstract: An electronic limit switch assembly including a sensor and a switching circuit controlled thereby contained in separate molded plastic housings. The sensor housing and the switching circuit housing are secured together with respective mating walls thereof in abutment and electrically coupled by leads protruding through the mating walls and protectively contained in a cavity in the mating wall of the sensor housing. A sensing coil is mountable for side sensing between a side wall of the sensor housing and an interior wall spaced therefrom defining a part of the cavity for side sensing and is also mountable for end sensing against an end wall opposite the mating wall and underlying the interior wall. Elements of the switching circuit are mounted on a printed circuit board and elongate conductive members secured to the board and connected with elements of the circuit protrude through mating holes in the top of the switching housing which function as terminal posts, heat sinks and circuit board mounts.