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:
Jun. 08, 1976
Filed:
Jul. 03, 1975
Applicant:
Inventor:
George Peters, Brooklyn, NY (US);
Assignee:
Lawrence Peska Associates, Inc., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E05B / ;
U.S. Cl.
CPC ...
3402 / ; 200 6166 ;
Abstract
A door lock carries an alarm and battery. The lock includes a tumbler system for cooperating with a serrated key. At the rear end of the key slot are located a pair of switches. One switch is normally open and is closed by the insertion of the key. The other switch is normally closed and includes a mass of iron on the switch wiper to be attracted by a magnet embedded in the key for opening the switch. The alarm, battery and switches are connected in a series circuit to cause the alarm to sound when a nonmagnet-bearing key is inserted in the key slot.