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:
Apr. 02, 1996
Filed:
Sep. 03, 1993
Frank Chalmers, South Porcupine, CA;
Robert Millions, South Porcupine, CA;
Placer Dome Inc., South Porcupine, CA;
Abstract
A communication system for use in a mine to provide two-way communication between a conveyance which moves in a mine and a communication network located in the mine. The system comprising: means for producing a signal indicative of the location of the conveyance in the mine; a plurality of repeaters situated in the mine and being coupled to the communication network; and a controller for controlling the repeaters and the controller being responsive to the signal and having means for activating the repeater which is proximate to the conveyance so that a communication link is provided between the conveyance and the communication network.