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This invention relates to apparatus fordetecting and locating metallic ores, minerals, and the like. Y A Y A The object of the invention is to provide an apparatus of simple construction and arrangement for detecting and locating ores, minerals, or buried treasure.

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Image detecting apparatus and method for reading and or verifying the contents of sealed envelopes Abstract. This invention relates to reading and analyzing the contents of sealed mail.

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4 Sheets-Sheet 1 A. R. BARRINGER METHOD AND APPARATUS FOR THE DETECTION OF ORE BODIES Feb. 6, 1962 Filed June 16, 1958 NN QN Feb. 6, 1962 A. R. BARRINGER METHOD AND APPARATUS FOR THE DETECTION OF ORE BODIES Filed June 16, 1958 4 Sheets-Sheet 2 ANTHONY R. BARR/NGER m mlb..

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Device for Testing and Calibrating Treasure Hunting Metal Detectors US4644290 (365K) Metal Detector Audio Amplifier US4719421 (639K) ... Method and Apparatus for the Remote Detection of Ore Bodies Utilizing Pulses of Short Duration to Induce Transient Polarization in the Ore Bodies 1963 US3471773 (214K) Metal Detecting Device with Inductively Coupled Coaxial Transmitter and Receiver Coils 1969 ...

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1971-10-19· This invention relates to an electromagnetic prospecting apparatus for detecting electrically conductive buried ore bodies and, more particularly, relates to apparatus which is advantageously adapted for airborne use. It is a continuation in part of my copending application Ser. No. 632,656 Pat. No. 3,500,715.

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The list of Reginald Fessenden patents contains the innovation of his pioneering experiments. Reginald Aubrey Fessenden received hundreds of patents for devices in fields such as high-powered transmitting, sonar, and television.

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1987-10-27· An apparatus for ore sorting includes a neutron irradiator (12), and a detector assembly (14) for detecting gamma radiation emitted by irradiated lumps (21) of the ore.

(54) METHOD AND APPARATUS FOR


means specifically, to detect distribution of burdens, positions of the ore layers, coke layers, the mixture thereof and the layers of the cohesive ore, hereinafter

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A detector is a device that converts a high frequency radio signal into a low frequency audio signal that can be heard through headphones or amplified and played through a loudspeaker.


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