GB521611A - Improvements in chain coal cutting machines for use in mines - Google Patents

Improvements in chain coal cutting machines for use in mines

Info

Publication number
GB521611A
GB521611A GB3402438A GB3402438A GB521611A GB 521611 A GB521611 A GB 521611A GB 3402438 A GB3402438 A GB 3402438A GB 3402438 A GB3402438 A GB 3402438A GB 521611 A GB521611 A GB 521611A
Authority
GB
United Kingdom
Prior art keywords
sleeve
spring
chain
screw
post
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
Application number
GB3402438A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NORMAN JAMES MUSCHAMP
Original Assignee
NORMAN JAMES MUSCHAMP
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NORMAN JAMES MUSCHAMP filed Critical NORMAN JAMES MUSCHAMP
Priority to GB3402438A priority Critical patent/GB521611A/en
Publication of GB521611A publication Critical patent/GB521611A/en
Expired legal-status Critical Current

Links

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
    • E21C25/22—Machines slitting solely by one or more cutter chains moving unidirectionally along jibs
    • E21C25/28—Chains or chain guides
    • E21C25/30—Chain guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/14—Arrangements for stretching the chain saw

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

521,611. Coal-cutting machines. MUSCHAMP, N. J. Nov. 23, 1938, Nos. 34024/38 and 23064/39. [Class 68 (i)] Relates to chain jibs for coal-cutting machines having fixed and movable parts, an interposed spring unit allowing limited reciprocatory movement of the movable part, and means associated with the spring unit for adjusting tension of the chain. In Fig. 1, the jib body is slidable on a post E to which is bolted a sleeve A containing a spring C pressing on an inner sleeve B with a flange F or abutments limiting its movement into the sleeve A; the flange F bears against the integral or attached head H of a screw G engaging a phosphor-bronze nut in the jib body. The movement allowed is insufficient to allow the chain to leave the chain race or driving sprocket. The arrangement of the parts may be reversed, or the sleeve A may be omitted, the spring C and sleeve B then being received in a recess in the post E. In Fig. 3, the spring unit is carried by the jib body, the screw G is held against rotation by a block on its outer end, and adjustment is effected by a nut H. The screw may be protected by a sleeve attached to the nut H and passing through the special unit. In another form, the jib body is fixed to the post E and has a slidable outer end between which and the body, the spring unit and adjusting means are arranged. The spring units may be packed with grease, or two spring units may be provided one on each side of the adjusting screw or each provided with an adjusting screw.
GB3402438A 1938-11-23 1938-11-23 Improvements in chain coal cutting machines for use in mines Expired GB521611A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3402438A GB521611A (en) 1938-11-23 1938-11-23 Improvements in chain coal cutting machines for use in mines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3402438A GB521611A (en) 1938-11-23 1938-11-23 Improvements in chain coal cutting machines for use in mines

Publications (1)

Publication Number Publication Date
GB521611A true GB521611A (en) 1940-05-27

Family

ID=10360409

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3402438A Expired GB521611A (en) 1938-11-23 1938-11-23 Improvements in chain coal cutting machines for use in mines

Country Status (1)

Country Link
GB (1) GB521611A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532981A (en) * 1946-02-09 1950-12-05 E C Atkins And Company Chain saw frame
FR2692516A1 (en) * 1992-06-18 1993-12-24 Stihl Andreas Cutting device for a chain motor saw.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532981A (en) * 1946-02-09 1950-12-05 E C Atkins And Company Chain saw frame
FR2692516A1 (en) * 1992-06-18 1993-12-24 Stihl Andreas Cutting device for a chain motor saw.

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