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. 27, 1980
Filed:
Jan. 09, 1978
Applicant:
Inventor:
Motohiro Gotanda, Inokashira, Mitaka-City, Tokyo, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ; H01H / ;
U.S. Cl.
CPC ...
340521 ; 200 6193 ; 335205 ; 340541 ; 340568 ;
Abstract
A key holding member of elongated shape having a rod of permanent magnet embedded therein or a sheet of permanent magnet adhered thereto, which, when put into its corresponding opening for receiving the key holding member in the key box provided at the front of a hotel or the like, comes close to a reed switch provided in the key box. In this manner the reed switch is rendered operative to close or open the electrical circuits connected to the reed switch so as to turn 'on' or 'off' a lamp which shows that the room is left absent and to cause an alarming device to alarm whenever the room is broken into or a fire starts in the room.