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:
Jan. 05, 2010
Filed:
Jun. 20, 2006
Raymond Chan, Hong Kong, CN;
Raymond Chan, Hong Kong, CN;
IDT Technology Limited, Hong Kong SAR, CN;
Abstract
A lap counter for use by a swimmer, has a case for attaching to the swimmer, and a compass sensor housed in the case for providing an output signal which changes between opposite directions along which the swimmer swims back and forth. An operating circuit includes a processor programmed to distinguish the change in the output signal of the compass sensor between the opposite directions to identify a reversal in direction of swimming by the swimmer and to count laps, each lap being based on two successive reversals in direction. The processor may also be programmed to distinguish the change in the compass sensor output signal to detect a rise above an upper threshold and a subsequent fall below a lower threshold, or vice versa, to identify, a wave in the output signal that represents a swimming stroke of the swimmer and to count the strokes.