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:
Mar. 08, 2016
Filed:
Sep. 12, 2013
Strata Proximity Systems, Llc, Sandy Springs, GA (US);
Larry D. Frederick, Hunstville, AL (US);
Strata Safety Products, LLC, Sandy Springs, GA (US);
Abstract
An integrated alarm device for a proximity detection system that is based on use of low frequency magnetic fields, to avoid conflicts in crowded work sites. A proximity detection system includes a magnetic field generator, and a personal alarm device. The personal alarm device includes an antenna configured to detect a magnetic field, a controller electrically coupled to the antenna, and a warning device electrically coupled to the controller. The warning device includes a sounder device and a shield, and the shield is adapted to attenuate EMI emitted from the sounder from reaching the antenna and/or from inducing current in electrical components in the personal alarm device.