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. 03, 1990
Filed:
Dec. 05, 1988
Jyoji Tsutsumi, Iwaki, JP;
Yoichi Hattori, Iwaki, JP;
Alps Electronic Co., Ltd., Tokyo, JP;
Abstract
A push-button switch of a water- and dust-proof structure wherein a good operating force charateristic is always assured. The push-button switch has a dummy terminal which is not to be directly soldered to a wiring pattern and is provided at a location of the push-button switch to which flux which appears when a terminal is being soldered to the wiring pattern does not come around. When the switch is soldered to a printed circuit board for the wiring pattern, flux may not possibly enter a gap between a case of the switch and the dummy terminal. After mounting of the switch on the printed circuit board, communication of air between inside and outside the case is assured by the gaps so that the inside of the case is maintained at an equal pressure with external air.