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:
Dec. 05, 1989
Filed:
Sep. 09, 1988
Thomas D Coe, Boxford, MA (US);
Q A Technology Company, Inc., Hampton, NH (US);
Abstract
A probe for providing electrical contact to electrical circuits during the testing thereof. There is a tubular housing having an open end and a generally closed end with a main portion extending from the generally closed end towards the open end and a retaining and sliding bearing portion adjacent the open end having a diameter small than the main portion. A probe plunger is disposed in the tubular housing and has a cylindrical inner portion which is a slide fit and disposed within the main portion of the tubular housing and a cylindrical outer portion of a diameter smaller than the inner portion and forming a shoulder with the inner portion at a point of meeting. The outer portion of the plunger passes through the retaining and sliding bearing portion and has an outside diameter which is a slide fit to the inside diameter of the retaining and sliding bearing portion. A longitudinally compressible bias spring is disposed between the generally closed end of the tubular housing and the inner portion of the probe plunger under a pre-loading for biasing the probe plunger towards an extended position.