Abstract: A color changer (20) comprising a component hue saturation filter (30) including an elongated flexible substrate (32) having a surface with a gradient axis (GA) and which includes a graded portion (G) supporting a uniform concentration of a selected hue filtering material (50) distributed in a continuously graded average density in beam-size areas around points along the gradient axis. The component hue saturation filters may be embodied in separate substrates positionable in parallel planes to be intersected serially by a beam of light. Alternately, dual-hue filters (68) may be formed by two primary hue component filters embodied in respective substrates each also embodying duplicate third primary hue component filters producing the same effects. Saturations of each selected hue of light appear evenly distributed in the output beam without the need for color components to be further commingled.

Abstract: A stage light projector including an electronically controlled lens system capable of independently positioning two lenses of a triplet lens system to focus light from different selected back focal plane distances to project images having different selected sizes upon a screen or stage at a selected distance.

Abstract: A lighting system aperture mechanism formed by a movable carriage including a frame with openings for aperture means. The frame is moved to position a selected opening around a beam of light, and an aperture means disposed in the selected opening may be rotated as desired to produce special effect patterns in the beam of light.

Abstract: The invention relates to a method and apparatus for detecting human eye defects, particularly detection of refractive error. The invention operates by recording on color film the eye reflex which occurs when eyes are exposed to a flash of light. The photographs are compared with predetermined standards, to detect eye defects. As shown in FIGS. 1 and 2, the base structure of the ocular screening system (10) is folding interconnect structure (12), comprising hinged sections (14), (16), and (18). Attached to one end of structure (12) is head positioning station (24) which comprises vertical support (26), a head positioning bracket (28) having one end attached to the top of support (26), and two head positioning lamps (33) to verify precise head positioning. At the opposite end of interconnect structure (12) is a camera station (34) with camera (38), electronic flash unit (44), and blinking fixation lamp (46), for photographing the eyes of persons being evaluated.

Abstract: A suspension bridge has a first deck supported from a pair of suspension cables by hangers and a second deck independently supported from a pair of suspension cables by hangers. The two parallel decks are separated by a gap whose width is not less than that of either of the decks and is preferably three or more times the width of a deck. The decks are joined at intervals along their length by stiff transverse girders 22 and intervening diagonal shear braces so that the two decks behave essentially as a single rigid body in regard to torsional movement. This results in very high aerodynamic damping of both torsional and bending modes of oscillation.

Abstract: A device for stabilizing structures such as chimneys and like stacks against transverse oscillation, comprising a mass connected to the structure by a pendulum suspension so as to oscillate in a direction transverse to the axis of the structure. The pendulum suspension includes a damper. The oscillation frequency of the mass/pendulum/damper assembly is matched to the natural frequency of the structure's vibrations, whereby the latter are attenuated. The mass may be in the form of a ring, suspended from the top of the structure by at least three pendulum/damper units spaced around the periphery. The units may also include springs or other devices to modify the natural frequency of oscillation of the device. In one version of the invention the mass comprises a first ring suspended from the structure, and a second ring similarly suspended from the first ring.