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:
Nov. 21, 1989
Filed:
Aug. 01, 1988
Burton L Siegal, Skokie, IL (US);
Electro-Technic Products, Inc., Chicago, IL (US);
Abstract
A manual apparatus for testing the vacuum of an evacuated vial. A cylindrical test enclosure having an access opening in the wall thereof is provided for the vial. A rotatable sleeve surrounds the enclosure and has a like access opening in registration with and rotatable to be in alignment with the access opening of the test enclosure. When the two access openings are rotated out of alignment, high voltage radio frequency power is applied to the exterior of the vial, and an intense flash of light occurs next to the vial to cause ionization of gas within the vial. The ionization current which results is indicative of the value of the vacuum within the vial.