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:
Oct. 06, 2015
Filed:
Feb. 15, 2013
Tien-ming Chou, Taichung, TW;
Tien-Ming Chou, Taichung, TW;
Other;
Abstract
A tilt switch includes a housing defining a chamber and including a frusto-conical inner wall surface having a cone angle which is less than or equal to 90 degrees, and a tapered bottom inner wall surface that defines a bottom end of the chamber, that tapers downwardly from a bottom end of the frusto-conical inner wall surface and that forms a cone angle which is greater than 90 degrees. A light emitter and a light receiver are disposed respectively at two opposite sides of the chamber. A rolling element is rollable in the chamber between blocking and unblocking positions, where the rolling element blocks and unblocks light emitted from the light emitter, respectively.