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:
May. 29, 1990
Filed:
Aug. 08, 1988
Hachiro Maeyama, Nara, JP;
Tsuyama Mfg. Co., Ltd., Osaka, JP;
Abstract
A pulsimeter comprises a pulse sensor portion including a light emitting diode and a photodiade, and a main body, the pulse sensor portion and the main body being connected through a cord. The main body includes a received light comparing circuit for comparing a quantity of light received by the photodiode with a predetermined valve, and a display device for displaying a result of the comparison. If there is no abnormality in the cord and the pulse sensor portion in normal condition is not in contact with a human body, the quantity of received light in increased to cause a light emitting diode of the display device to be turned on. On the other hand, if there is any abnormality in the cord or the pulse sensor portion, the quantity of received light is not increased and the light emitting diode is not turned on. While the pulsimeter in normal condition is being used, the light emitting diode is not turned on because of light transmission through the human body. However, if short circuit occurs in the cord, the received light comparing circuit is operated as if it is operated by an increase in the quantity of received light, causing the light emitting diode to be turned on.