GB521370A - Improvements in or relating to grinding and abrading machines - Google Patents

Improvements in or relating to grinding and abrading machines

Info

Publication number
GB521370A
GB521370A GB3339438A GB3339438A GB521370A GB 521370 A GB521370 A GB 521370A GB 3339438 A GB3339438 A GB 3339438A GB 3339438 A GB3339438 A GB 3339438A GB 521370 A GB521370 A GB 521370A
Authority
GB
United Kingdom
Prior art keywords
wheel
rest
plunger
bar
finger
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
GB3339438A
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.)
F E ROWLAND AND Co Ltd
FREDERIC EDGAR ROWLAND
Original Assignee
F E ROWLAND AND Co Ltd
FREDERIC EDGAR ROWLAND
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 F E ROWLAND AND Co Ltd, FREDERIC EDGAR ROWLAND filed Critical F E ROWLAND AND Co Ltd
Priority to GB3339438A priority Critical patent/GB521370A/en
Publication of GB521370A publication Critical patent/GB521370A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • B24B47/18—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces for rotating the spindle at a speed adaptable to wear of the grinding wheel

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

521,370. Grinding-machines. ROWLAND & CO., Ltd., F. E., and ROWLAND, F. E. Nov. 17, 1938, No. 33394. [Class 60] Electrically-driven machines of the type in which the work is applied to the wheel by hand have the rest interconnected with change speed gearing and with a finger adapted' to make contact with the wheel and with switch mechanism so that on the one hand the wheel cannot be driven at an unsafe speed and on the other cannot continue to be driven at an uneconomical speed after the wheel diameter has become reduced. The rest 28, is movable towards and from the wheel centre on a bracket 27 adjustable vertically on the frame, and as the rest is reset from time to time following the wheel as it becomes reduced in diameter, a cam projection 33, Fig. 7, eventually engages the plunger 32 of a switch 31 and stops the driving motor. When the belts have been shifted on the line pulleys to give the next higher speed, the motor having a pivoted mounting 21 for this purpose, the movement of the belt forks 36, through links 44, 45 and bell crank 43 moves a slide 29 carrying the switch away from the projector 33 to permit a further range of inward adjustment of the rest. The bell crank is connected through bevel gearing 41 to an arm 46 linked to the finger 48, so that the finger is moved towards the wheel and prevents the belts from being moved more than one step on the cone pulleys. To prevent the motor from being restarted after backward movement of the rest to an unsafe distance from the wheel a bar 49 carried by links 50 rests on the switch plunger 32 and if such movement be attempted the frictional engagement between the bar and plunger will cause the bar to ram the plunger down. A catch and resetting finger may be provided for the bar accessible only from within the frame. The machine as shown has two motors driving separate but aligned shafts 13 each carrying a wheel 17 mounted in antifriction bearings 18 on a fixed sleeve 15 through which the driving- shaft passes with clearance, drive being communicated to the wheel at 19. One motor may drive the two spindles, independent belt tensioning being provided for by means such as jockey pulleys.
GB3339438A 1938-11-17 1938-11-17 Improvements in or relating to grinding and abrading machines Expired GB521370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3339438A GB521370A (en) 1938-11-17 1938-11-17 Improvements in or relating to grinding and abrading machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3339438A GB521370A (en) 1938-11-17 1938-11-17 Improvements in or relating to grinding and abrading machines

Publications (1)

Publication Number Publication Date
GB521370A true GB521370A (en) 1940-05-20

Family

ID=10352362

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3339438A Expired GB521370A (en) 1938-11-17 1938-11-17 Improvements in or relating to grinding and abrading machines

Country Status (1)

Country Link
GB (1) GB521370A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2430843A (en) * 1944-04-08 1947-11-11 Defiance Machine Works Inc Machine tool spindle
US2629976A (en) * 1949-06-04 1953-03-03 Vinco Corp Grinding wheel spindle
US2860354A (en) * 1955-05-13 1958-11-18 Pittsburgh Plate Glass Co Mountings for rotary brushes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2430843A (en) * 1944-04-08 1947-11-11 Defiance Machine Works Inc Machine tool spindle
US2629976A (en) * 1949-06-04 1953-03-03 Vinco Corp Grinding wheel spindle
US2860354A (en) * 1955-05-13 1958-11-18 Pittsburgh Plate Glass Co Mountings for rotary brushes

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