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. 31, 2016
Filed:
Nov. 26, 2014
Stolar, Inc., Raton, NM (US);
Larry G. Stolarczyk, Raton, NM (US);
Igor Bausov, Raton, NM (US);
Stolar, Inc., Raton, NM (US);
Abstract
An underground mine communications upgrade comprises an independent VHF-UHF band to MF band repeater-transceiver translator (RTT) and loop antenna added to a conventional miner's cap-lamp and helmet. VHF/UHF band communications with nearby conventional handsets are translated to medium frequency (MF band) communications that couple mine-wide to copper-core life-lines in all the entries. Such life-lines also do well supporting ultra low frequency (ULF), through-the-earth (TTE) communications with the surface above. Roof mounted borehole MF band ULF RTT's are coupled to the dual-frequency life-lines and bridge the MF band communications on the life-lines with the ULF communications on the life-lines. The MF band radio traffic primarily consists of digital packetswitch communications. Both the cap-lamp and borehole RTT's translate between the types of modulation used on the VHF/UHF band handsets, and also the types of modulation used on the ULF TTE surface communications, with the MF band digital packetswitch communications.