Download PDF Info Publication number US801583A. ... Authority US United States Prior art keywords machine coal rod cutting fender 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 ...
Coal cutting machine Download PDF Info Publication number USA. ... Authority US United States Prior art keywords machine frame pedestals elements drum 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 ...
US862831A US344656A USA US862831A US 862831 A US862831 A US 862831A US 344656 A US344656 A US 344656A US A US A US A US 862831 A US862831 A US 862831A Authority US United States Prior art keywords coal machine cutting machine bar cutter Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
2. To increase the coal output of a face. Advantages of a Coal Cutting Machines were: Straight and systematic advance at the whole face Because of the systematic advance of the whole face, systematic roof supprots can be set to provide a uniform subsidence of the roof beds behind the moving face. This is important in longwall face.
Download PDF Info Publication number ... COAL CUTTING MACHINE Filed Aug. 16, 1927 5 Sheets{Sheet 2 7 O 7, 930 E. F. MULLER 1,777,621 . COAL CUTTING MACHINE Filegl Aug. 16, 192 3 ShQQtQSHOQt 3 The present invention relates to certain{ new and useful linprovem'entsin coal cutting;
A coal cutting machine has a rotary cutter drum mounted on a machine adapted to travel the length of a coal face, the drum has picks mounted thereon for cutting coal from the face, and includes at least one electrically operated sensitive pick engaging the coal face and to produce an electric signal proportional to the cutting force on the pick.
Download PDF Info Publication number ... 167857A US A US A US A US A US A US A Authority US United States Prior art keywords machine coal chain apron cutting Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. ... cutting process ...
coal cutting machine machine 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 Lifetime Application number USA Inventor Hubert L Smith Original Assignee Hubert L ...
ELECTRIC MININGMACHINERY, WITH SPECIAL REFERENCE TO THE APPLICATION OF ELECTRICITY TO COALCUTTING, PUMPING, AND ROCKDRILLING. (INCLUDES PLATES AND APPENDIX). Authors: L B ATKINSON, C W ATKINSON. Source: Minutes of the Proceedings of the Institution of Civil Engineers, Volume 104, Issue 1891, 1 Jan 1891 (89113) COAL. CUTTING. MACHINERY.
US438446A Coalcutting machine Google Patents Coalcutting machine . Download PDF Info Publication number US438446A. US438446A US438446DA US438446A US 438446 A US438446 A US 438446A US 438446D A US438446D A US 438446DA US 438446 A US438446 A US 438446A Authority US United States
Publication Publication Date Title. US830586A Coalcutting machine. USA Drilling apparatus. US292927A Index head foe milling machines. USA Lathe attachment.
ISBN: 60th Annual Conference and Expo of the Institute of Industrial Engineers 2010 Cancun, Mexico 59 June 2010 Volume 1 of 5
US450971A Coalcutting machine Google Patents Coalcutting machine . Download PDF Info Publication number US450971A. ... Authority US United States Prior art keywords machine track arm coal wheels Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal ...
The Dasco Pro 3/4 in. x 12 in. Concrete Chisel is designed to break up concrete floors, sidewalks and paving slabs when an air hammer would be impractical. The target guard provides protection for your hand from glancing blows and missed hits. Meets or exceeds ANSI standards. Made in the USA. For breaking up concrete floors, sidewalks, and ...
US594898A Coalcutting machine Google Patents Coalcutting machine . Download PDF Info Publication number US594898A. US594898A US594898DA US594898A US 594898 A US594898 A US 594898A US 594898D A US594898D A US 594898DA US 594898 A US594898 A US 594898A Authority US United States
Cutting angle From the large number of studies conducted over the year it has been established that the minimum energy consumption in coal cutting is achieved for cutting angles of 55650. But the bits fitted on most winning machines have cutting angle between 66850 and sometimes more.
Mechanical cutting. Our comprehensive range of mechanical cutting equipment offers effective solutions for a wide range of underground mining and construction applications, including rapidentry roadway development, demanding production settings without drilling and blasting, as well as boring of ore passes and ventilation shafts.
The CoalCutting Machine described in the present paper has been worked daily or nightly for nearly two years at the Platt Lane Colliery of the Wigan and Whiston Coal Co., in a seam of coal known by the name of the "Pemberton Little Coal" or "Pemberton Yard Mine."
USA US337845A USA USA US A US A US A US 337845 A US337845 A US 337845A US A US A US A US A US A US A Authority US United States Prior art keywords coal cutting machine pawl barrel machine Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
Coalcutting machine Download PDF Info Publication number USA. ... Authority US United States Prior art keywords machine shaft coal tunnel truck 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 ...
misc{etde_78946, title = {Selection procedure of coal cutting machine} author = {Singh, T N} abstractNote = {Selection of equipment for cutting of coal is undergoing radical modification with optimisation of energy requirement, cutting array and design of bits. An experimental study was undertaken to define power requirements for ploughing and shearing of coal by a particular geometry of ...
US409870A Coalcutting machine Google Patents Coalcutting machine . Download PDF Info Publication number US409870A. US409870A US409870DA US409870A US 409870 A US409870 A US 409870A US 409870D A US409870D A US 409870DA US 409870 A US409870 A US 409870A Authority US United States
Download PDF Info Publication number USA. ... 1952 H. G. LEWIS COAL CUTTING AND LOADING MACHINE 5 SheetsSheet 3 Filed July 22. 1949 Harold G. Lewis Patented May 6, 1952 COAL CUTTING AND LOADING MACHINE Harold G. Lewis, Peytona, W. Va., assignor of thirtythree and onethird per cent to Jesse C. Clendenin and thirtythree and onethird ...
DASCO is a family owned company, helping families in need of home medical equipment since 1987. Our home office is located in Westerville, Ohio with several branches throughout Ohio, West Virginia, Kentucky, Indiana, Michigan and Texas to serve you. DASCO was established in 1987 by Don Seeley and is now owned by his children, Jason and Rachel.
100% (1) 115 views 19 pages Cutting Machines Uploaded by Dinesh dhakar Copyright: © All Rights Reserved Flag for inappropriate content of 19 Cutting Machines Introduction There have been several different types of cutting machine developed over the years, but "shearers" and "ploughs" have proved to be the most successful,
The first chain coal cutting machine was invented in Coatbridge in 1871 by John Alexander of the iron and coalmasters William Baird and Company. This kind of coal cutter works much like a chainsaw, with sharp metal teeth attached to a moving chain.
US928056A Coalcutting machine. Google Patents Coalcutting machine. Download PDF Info Publication number US928056A. US928056A USA USA US928056A US 928056 A US928056 A US 928056A US A US A US A US A US A US A US 928056 A US928056 A US 928056A
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