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. 01, 1990
Filed:
Jan. 24, 1989
Bryce L Hesterman, Orem, UT (US);
Other;
Abstract
A touch-controlled switch and alarm system for protecting electrically conductive objects. The touch switch automatically adjusts itself within a few seconds to a wide range of ungrounded conductive objects, is not triggered by AC power line transients or failures, has a back-up battery for operation during power failures, and is automatically triggered if the power plug is disconnected. A unique underdamped automatic gain control circuit allows a simple unidirectional trigger to sense both increases and decreases of capacitance to ground. The alarm includes a lock switch for arming and disarming the alarm, and status indicators to show whether or not the system has been armed or triggered. The lock switch itself is protected by the alarm system because the lock switch has an electrically conductive body which is connected to the touch switch along with the protected objects.