The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 16, 1977
Filed:
Nov. 15, 1976
Robert H Stewart, Tampa, FL (US);
Practical Systems, Inc., Tarpon Springs, FL (US);
Abstract
An alignment device of the type primarily intended for use in combination with an ophthalmic cylinder surfacing machine to insure proper optical axis alignment of the lens blank, to the lap, as it is being ground. The device includes a base member which is fitted into the lap-retaining table of the surfacing machine and a top member which is fitted onto the pins of the pin holder of the machine. An open circuit including an audible or visual signal is mounted within the base member, and electrical contacts for the circuit are disposed on the base's upper surface. Corresponding electrical contacts are disposed on the bottom of the top member so that when the top is placed in contiguous, overlying relationship to the base, if the alignment of the machine is properly adjusted, the electrical circuit will be completed resulting in either an audible or visual signal to the operator that the machine is ready for use.