GB164855A - Improvements in or connected with cutter bars of cutting machines for use in mining coal and other minerals - Google Patents
Improvements in or connected with cutter bars of cutting machines for use in mining coal and other mineralsInfo
- Publication number
- GB164855A GB164855A GB785420A GB785420A GB164855A GB 164855 A GB164855 A GB 164855A GB 785420 A GB785420 A GB 785420A GB 785420 A GB785420 A GB 785420A GB 164855 A GB164855 A GB 164855A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cutting machines
- bar
- minerals
- cutter bars
- mining coal
- 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.)
- Expired
Links
- 239000003245 coal Substances 0.000 title 1
- 229910052500 inorganic mineral Inorganic materials 0.000 title 1
- 239000011707 mineral Substances 0.000 title 1
- 238000005065 mining Methods 0.000 title 1
- 230000007423 decrease Effects 0.000 abstract 1
- 230000007425 progressive decline Effects 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
- E21C25/10—Rods; Drums
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
164,855. Mavor & Coulson, Ltd., and Mavor, S. M. March 17, 1920. Coal-cutting machines.-In a machine with a tapered cutter bar provided with two helical fins each having a thrusting face approximately at right-angles to the axis of the bar, the pitch of the fins decreases progressively in a regular or varying manner with the progressive decrease in diameter of the bar. In one form, the pitch is variable only at the end portions of the bar, and is constant in the intermediate portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB785420A GB164855A (en) | 1920-03-17 | 1920-03-17 | Improvements in or connected with cutter bars of cutting machines for use in mining coal and other minerals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB785420A GB164855A (en) | 1920-03-17 | 1920-03-17 | Improvements in or connected with cutter bars of cutting machines for use in mining coal and other minerals |
Publications (1)
Publication Number | Publication Date |
---|---|
GB164855A true GB164855A (en) | 1921-06-17 |
Family
ID=9841061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB785420A Expired GB164855A (en) | 1920-03-17 | 1920-03-17 | Improvements in or connected with cutter bars of cutting machines for use in mining coal and other minerals |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB164855A (en) |
-
1920
- 1920-03-17 GB GB785420A patent/GB164855A/en not_active Expired
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