EP 0321383 B1 19930623 - DEVICE FOR DETECTING THE CUTTING HORIZON FOR WINNING MACHINES
Title (en)
DEVICE FOR DETECTING THE CUTTING HORIZON FOR WINNING MACHINES
Publication
Application
Priority
DE 3742753 A 19871217
Abstract (en)
[origin: US4992657A] The cutting horizon for mining machines, such as coal ploughs and roll loaders, in particular the position of the coal-rock interlayer, can be determined with the aid of light signals of selected wavelengths at reflection layers, at least one sensor head guiding iding dragging along the floor and having at least one optical waveguide bundle constructed as measured-value pickup and guided in a passage sealed with a crystal window being arranged on the mining machine and a transmitted and receving station being arranged on the machine body. For clear identification of the carbon-rock interlayer the passage (6) receiving the optical waveguide bundles (5,5') extends in the exit of the sensor head (3) at an angle of 30 DEG and the lower surface (13) of the crystal window (7) extends parallel to the floor (2).
IPC 1-7
IPC 8 full level
E21C 35/08 (2006.01)
CPC (source: EP US)
E21C 35/08 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE ES FR GB
DOCDB simple family (publication)
EP 0321383 A1 19890621; EP 0321383 B1 19930623; DE 3882028 D1 19930729; ES 2041825 T3 19931201; PL 160854 B1 19930430; PL 276460 A1 19890724; US 4992657 A 19910212; ZA 889430 B 19890927
DOCDB simple family (application)
EP 88630229 A 19881214; DE 3882028 T 19881214; ES 88630229 T 19881214; PL 27646088 A 19881216; US 28433788 A 19881214; ZA 889430 A 19881215