E - Fixed Constructions – 21 – C
Patent
E - Fixed Constructions
21
C
262/48
E21C 47/02 (2006.01) E02F 7/04 (2006.01) E02F 9/20 (2006.01) E21C 35/08 (2006.01) E21C 47/00 (2006.01)
Patent
CA 1247664
Abstract of the disclosure The invention relates to an apparatus for work- ing deposits by the open-cast working process with a self- propelled chassis, with a cutting cylinder mounted ver- tically adjustably thereon to cut away the deposit to a given depth, and with a loading apparatus for the material cut away, in which one or more photosensors I and II are provided at the height of the cut-away surface of the deposit, which react to the light reflected by the dep- osit and control the vertical adjustment of the cutting cylinder. The sensors preferably consist of a photo- transmitter and a photoreceiver which are arranged juxta- posed and preferably operate with a light wavelength in the infra-red range. The invention further relates to the special photosensor arrangement in which the photosensor is arr- anged in, and at a distance from the lower end of a hollow element open at the bottom, arranged preferably vertically behind the cutting cylinder, and a compressed air supply is provided preferably in the upper part of the hollow element, whereby dust and dirt are kept away from the photosensor.
501183
Fetherstonhaugh & Co.
Wirtgen Reinhard
LandOfFree
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