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:
Mar. 30, 2004
Filed:
Sep. 20, 2002
Masashi Iwasawa, Otsu, JP;
Hiroyuki Ikeda, Otsu, JP;
Tsuyoshi Hatano, Otsu, JP;
Fumikatsu Sone, Otsu, JP;
Optex Co., Ltd., Shiga, JP;
Abstract
To provide an anti-thief security sensor assembly wherein an optical axis adjustment of a beam projector can be accurately achieved merely by physically opening a cover of a beam projecting unit while a cover of a beam receiving unit is not opened physically, the anti-thief security sensor assembly includes a beam projecting unit ( ) for emitting an infrared beam IR and having a projector cover ( A) mounted on a projector base ( A) so as to cover and protect a sensor circuit. This beam projecting unit ( ) includes an opening detecting switch ( ) for detecting the physical opening of the projector cover ( A) and a transmission request generating circuit ( ) operable in response to the detection by the opening detecting switch ( ) to output a received beam level transmission request signal B to the beam receiving unit ( ). The beam receiving unit ( ) for receiving the infrared beam IR from the beam projecting unit includes a level output circuit ( ) operable in response to receipt of the received beam level transmission request signal B to transmit to the beam projecting unit ( ) a level display signal C indicative of the amount of the infrared beam received by the beam receiving unit ( ).