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. 29, 2018
Filed:
Nov. 17, 2014
Desco Industries, Inc., Chino, CA (US);
Siarhei V. Savich, Chino Hills, CA (US);
Desco Industries, Inc., Chino, CA (US);
Abstract
A grounding monitoring device is disclosed herein. In a described embodiment, the grounding monitoring device comprises a wrist strap comprising a first conductive portion for providing a first discharge path between a human arm and a ground; and a second conductive portion electrically isolated from the first conductive portion for providing a different second discharge path between the human arm and the ground. The grounding monitoring device further comprises a bipolar control voltage generator for applying a first voltage at a frequency fto the first conductive portion and an opposite second voltage at the frequency fto the second conductive portion; and an electrical circuit for: receiving a first total signal from the first conductive portion; receiving a second total signal from the second conductive portion; and forming an output signal based on a differential and common mode gains of the electrical circuit. The grounding monitoring device further comprises a comparator for comparing a portion of the output signal that corresponds to the frequency fwith a first threshold value; and comparing a portion of at least one of the first total signal and the second total signal that corresponds to the frequency fwith a second threshold value; wherein an alarm signal is activated depending on the comparisons made by the comparator.