Orshansky Transmission Corporation

Techna Vision Incorporated

Robert W Millar

William H Weitzel

Theodore V Kachel

Ralph C Dawson

Robert L Griffith

Clarence F Rydeen

A spin coater suitable for spin coating spectacle lens molds with polymerizable coating composition. The spin coater includes a drawer which rotatably mounts at least one chuck thereon, which drawer is slidable between a front and rear position within a housing to sequentially allow application of a coating by the spinning chucks in the front chamber of the housing, followed by polymerization thereof in the rear chamber. Each chuck of the spin coater is provided with a mold seat defined by a ledge and adjacent lip, the lip automatically centering the mold in the seat axis by virtue of its dimensions in relation to the mold. The chuck also has a lengthwise resilient vacuum conduit, preferably in the form of a bellows, which has an open end which can sealingly engage against a seated mold, such that when a vacuum is applied through the vacuum conduit the mold is urged firmly against the ledge of the mold seat. A method of producing a coated spectacle lens, preferably using such a spin coater, involves providing two different abrasion resistent coatings on front and rear molding surfaces of a form, which coatings are only partially polymerized. The form is then filled with resin which is cured and the coated formed lens is separated from the form. The coatings on the lens are then preferably further polymerized by exposure to actinic light.

Spin coater

A fast-response three-way solenoid valve. A housing has three openings interconnected by a linear fluid pathway, with two chambers each disposed between two openings and having at least one valve seat per chamber. In each chamber a ball is movable toward and away from a valve seat to open and to close off the flow of fluid there. A separator pin is disposed, with clearance, within the linear pathway between the two chambers and bearing against both balls; when one ball is seated against its seat, the other ball is away from its seat. A solenoid has a plunger which moves upon energization of the solenoid, and a guide passage between the plunger and one chamber is aligned with both chambers and the balls. A plunger pin disposed in the guide passage bears against one ball on the side thereof opposite to the separator pin; the other end of the plunger pin bears against the plunger when the solenoid is energized. Movement of the plunger upon the energization of the solenoid causes the plunger to contact and move the plunger pin, in turn moving the balls and their separator pin, so that one ball is seated when the solenoid is energized, and the other ball is seated when the solenoid is de-energized.

Fast-response three-way solenoid valve

Growing community of inventors

San Diego, CA, United States of America

Robert W Millar