Abstract: An automatic water replenishing system is designed for use with multiple dye vats used for tinting eyeglass lenses, but the broad principles of the invention could apply to other systems used for replenishing individual ones of plural vats or reservoirs with water or some other liquid. A rotary water distributor rotates about an arc when it is signaled by water level sensors that the water in a particular vat is low. As the rotary distributor reaches the low reservoir, the LED carried by the distributor actuates a photo transistor adjacent the particular reservoir that needs replenishing, causing the motor to stop and the water supply solenoid valve to be actuated, filling the reservoir until a brief period of time after the level sensor indicates a full condition to the central control system.

Abstract: A protection system for a video display terminal (VDT) is designed for two basic purposes, first, the blockage and absorption of EMF, ultraviolet and X-rays from the VDT, and second, the elimination of glare from ambient light directly impacting the eye and reflected from the screen VDT. The invention comprises a dark, dull enclosure which adjustably connects to the front of the VDT and has a first, lower reflector having a metal-based reflective surface absorb some harmful rays and reflects the visual image and some of the harmful rays from the VDT to a second, upper reflector having an organic-based reflective surface which reflects the visual light spectrum image forward, so that it can be viewed by persons sitting in front of the VDT while allowing the harmful higher-frequency radiation to harmlessly pass through the plastic material.

Abstract: A system is provided for tinting eyeglass lenses wherein the lenses are engaged in a frame which is both vertically reciprocated and simultaneously rotated about on an axis central to and orthogonal to the plane of the lens so that an annular gradient tint is produced darker at the outside edges of each lens and becoming progressively lighter toward the center, with the optical center of the lens either being completely clear or substantially lighter than the rest of the lens.

Abstract: An eyeglass lens tinting machine which utilizes a microprocessor-controlled stepping motor to carefully control the vertical oscillations of a support structure including a vertical shaft which mounts a horizontal boom which in turn supports an eyeglass lens holder. The lens holder is moved directly up and down (with substantially no horizontal components of movement) by the mechanism. The base which mounts the vertically sliding shaft which supports the boom also mounts the stepping motor and printed circuit board with the microprocessor controller on it. The tinting machine has two basic modes of operation, the solid tint mode in which the lens is lowered beneath the surface of dye in a dye vat and reciprocated completely immersed for a pre-set period of time to create an even, uniform tint.