DE229763C - - Google Patents

Info

Publication number

DE229763C

DE229763C DENDAT229763D DE229763DA DE229763C DE 229763 C DE229763 C DE 229763C DE NDAT229763 D DENDAT229763 D DE NDAT229763D DE 229763D A DE229763D A DE 229763DA DE 229763 C DE229763 C DE 229763C

Authority

DE

Germany

Prior art keywords

signal

pull

lever

arms

conveyor

Prior art date

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

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• 230000011664 signaling Effects 0.000 claims description 7
• 230000003287 optical effect Effects 0.000 claims description 4
• XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
• 239000003245 coal Substances 0.000 description 5
• 229910052742 iron Inorganic materials 0.000 description 4
• 230000004888 barrier function Effects 0.000 description 3
• 238000004880 explosion Methods 0.000 description 3
• 230000001681 protective effect Effects 0.000 description 3
• 238000005065 mining Methods 0.000 description 2
• 241000182341 Cubitermes group Species 0.000 description 1
• 230000001174 ascending effect Effects 0.000 description 1
• 230000008859 change Effects 0.000 description 1
• 230000000881 depressing effect Effects 0.000 description 1
• 230000002349 favourable effect Effects 0.000 description 1
• 238000004519 manufacturing process Methods 0.000 description 1
• 239000000463 material Substances 0.000 description 1
• 238000000034 method Methods 0.000 description 1
• 230000008569 process Effects 0.000 description 1
• 230000008439 repair process Effects 0.000 description 1
• 230000008054 signal transmission Effects 0.000 description 1