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. 11, 1994
Filed:
Nov. 06, 1992
Applicant:
Inventors:
Takashi Naito, Kanagawa, JP;
Susumu Tosaka, Kanagawa, JP;
Assignee:
Sony Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340584 ; 340595 ; 340607 ; 340653 ; 364184 ; 371 14 ;
Abstract
An alarm device is provided with a temperature sensor for detecting an internal temperature of a magneto-optical disc drive unit having a cooling fan and a replaceable dust filter. When the internal temperature becomes higher than or equal to a predetermined temperature due to the breakdown of the fan or the silting of the filter, the alarm device indicates an abnormal condition of the drive unit by flashing an operation indicating lamp.