NIOSHTIC-2 Publications Search

Short range trapped miner locator.

Authors
Webb WE; Church RH
Source
US Pat 4,491,971 1985 Jan; :1-4
NIOSHTIC No.
10001466
Abstract
A short range, low power, radio wave transmitter which acts as a miner locator. The transmitter is incorporated with the cap lamp circuitry for the miner. It utilizes the same self-contained power source and its wire connection thereto acts as the transmitter's antenna. No action on the miner's part is necessary in order to begin the transmission which may be on a specific identifying frequency for each miner. An electronic crowbar circuit may be used to conserve power for the transmitter by cutting off power to the cap lamp should the voltage across the self-contained power source fall below a preset level. This enables the transmitter to function for several days by reducing the load on the power source.
Keywords
Mine safety; Underground miners; Mining industry; Emergency equipment; Communications equipment
Publication Date
19850101
Document Type
Patent
Fiscal Year
1985
NIOSH Division
TURC
Source Name
United States Patent 4,491,971
State
AL
Page last reviewed: July 15, 2022
Content source: National Institute for Occupational Safety and Health Education and Information Division