Abstract: A dimmer control device is disclosed which determines when to switch a voltage level supplied to a light fixture comprised of a plurality of light bulbs by monitoring the phase relation between an input voltage and input current. When the phase relation is within acceptable tolerance limits, external control inputs to lower, i.e., dim, or raise the illumination level are accepted and processed. The dimmer control device further compensates for warmup and startup transistions by directing input voltage through relays that provide full voltage until desired voltage/current phase relation is established within acceptable tolerance levels. And further provides for a full voltage output when a failure or abnormal conditions are determined.

Abstract: A dimmer control device is disclosed which determines when to switch a voltage level supplied to a light fixture comprised of a plurality of light bulbs by monitoring the phase relation between an input voltage and input current. When the phase relation is within acceptable tolerance limits, external control inputs to lower, i.e., dim, or raise the illumination level are accepted and processed. The dimmer control device further compensates for warnup and startup transistions by directing input voltage through relays that provide full voltage until desired voltage/current phase relation is established within acceptable tolerance levels.

Abstract: An apparatus for light curing of an adhesive resin coating on a continuous string-like linear product is shown. It consists of an elongated chamber having a light reflective inner side wall and removable end caps. The product coated with the adhesive resin is passed through the chamber through transverse slots formed in the end caps. The ultraviolet curing light is injected into the chamber by a light guide inserted through the peripheral side wall. Nitrogen gas may be also passed through the chamber to enhance the curing process of the resin.

Abstract: This coupling device is for coupling a light guide such as a light wand to a light source for photocuring purposes. It enhances the curing ability of the photocuring system at lower wavelength of light while at the same time provides thermal isolation between the lamp housing and the light wand.