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. 28, 1993
Filed:
May. 29, 1991
Northern Telecom Limited, Montreal, CA;
Abstract
In a telephone alerter a transducer disc is held onto a printed circuit board by an annular housing which is detachable from the board. The housing has spaced feet which are received through apertures in the board and the housing is then rotated to engage the feet with one side of the board and hold the housing in position. The transducer disc is easily removed by rotating the housing in the opposite direction to withdraw it from the printed circuit board. Preferably, the disc is retained within the housing by an O-ring retainer which is compressed between the printed circuit board and the disc. Upon removal of the housing, the disc and retainer may then be immediately withdrawn from the housing.