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:
Apr. 18, 1989
Filed:
Jun. 06, 1988
William J Cauley, Washington, MI (US);
Cheatham T Dudley, Rochester, MI (US);
Other;
Abstract
An electrical receptacle for selectively receiving two prong polarized or three prong grounded electrical plugs while excluding non-polarized plugs and other foreign materials from being inserted into the receptacle apertures. The receptacle is provided with a body having an internal cavity containing an aperture shield and a locking bar. The aperture shield is biased to the closed position obstructing the receptacle aperture and is retained in the closed position by the locking bar. The locking bar shifts to the unlocked position upon the insertion of the polarized plug or a ground prong enabling the aperture shield to shift transversely to the open position in response to plug insertion.