GB429741A - Change-speed gearing for lathes and other machine-tools - Google Patents

Change-speed gearing for lathes and other machine-tools

Info

Publication number
GB429741A
GB429741A GB3590834A GB3590834A GB429741A GB 429741 A GB429741 A GB 429741A GB 3590834 A GB3590834 A GB 3590834A GB 3590834 A GB3590834 A GB 3590834A GB 429741 A GB429741 A GB 429741A
Authority
GB
United Kingdom
Prior art keywords
discs
cam
stems
arrangement
gearing
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
GB3590834A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB3590834A priority Critical patent/GB429741A/en
Publication of GB429741A publication Critical patent/GB429741A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/02Driving main working members
    • B23Q5/04Driving main working members rotary shafts, e.g. working-spindles
    • B23Q5/12Mechanical drives with means for varying the speed ratio
    • B23Q5/14Mechanical drives with means for varying the speed ratio step-by-step
    • B23Q5/142Mechanical drives with means for varying the speed ratio step-by-step mechanically-operated
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q2705/00Driving working spindles or feeding members carrying tools or work
    • B23Q2705/02Driving working spindles
    • B23Q2705/06Mechanical drives with means for varying the speed ratio
    • B23Q2705/062Mechanical drives with means for varying the speed ratio for lathes
    • B23Q2705/064Mechanical drives with means for varying the speed ratio for lathes mechanically controlled

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

429,741. Controlling change speed gearing. HERBERT, SIR A., LLOYD, A. H., and HARRISON, H. T., c/o Herbert, Ltd., Canal Road, Edgwick, Coventry. Dec. 14, 1934, No. 35908. [Class 80 (ii)] Selector mechanism for controlling changespeed gearing for lathes and other machine tools comprises the twin rotary and contracting profile discs 40 described in Specification 382,784, but adapted for operating sliding gears instead of friction clutches. A driving- shaft 12 is adapted to be connected by a disc clutch 13 to a shaft 17 which drives on through a reversing-gear in series with three twospeed gears with sliding toothed change wheels. These three two-speed gears in series are controlled respectively by three stems 39, and eight forward speeds are effected by closing in on these stems the present profile discs 40. In a preselector arrangement shown, the discs 40 are held apart from the stems 39 while the gearing is in motion and are present from a turnable dial 50. A cam barrel 51 is then turned one revolution from a handwheel. A control collar 15 is first slid by a cam 53 against a disc brake 16 to arrest the transmission. A cam 52 then operates twin levers 43 in unison to throw towards each other collars 41 which press against the backs of the profile discs 40 through springs 42. The stems 39 are thus operated yieldingly towards the selected serial combination, and the gear teeth to be enmeshed have sharpened ends to facilitate change of mesh. The cam 53 then by moving the collar 15 engages the clutch 13 and the drive proceeds on the new ratio. The cam 52 then separates the twin collars 41 and discs 40. In a modified preselector arrangement, the cam barrel 51 is replaced by a trip lever. In another arrangement, the profile discs 40 are not withdrawn after closing in on the stems 39. This arrangement is not preselective since selection cannot be effected until the discs have been separated for the purpose. The profile discs may be contracted by suitable power means.
GB3590834A 1934-12-14 1934-12-14 Change-speed gearing for lathes and other machine-tools Expired GB429741A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3590834A GB429741A (en) 1934-12-14 1934-12-14 Change-speed gearing for lathes and other machine-tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3590834A GB429741A (en) 1934-12-14 1934-12-14 Change-speed gearing for lathes and other machine-tools

Publications (1)

Publication Number Publication Date
GB429741A true GB429741A (en) 1935-06-05

Family

ID=10382880

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3590834A Expired GB429741A (en) 1934-12-14 1934-12-14 Change-speed gearing for lathes and other machine-tools

Country Status (1)

Country Link
GB (1) GB429741A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103758946A (en) * 2014-01-22 2014-04-30 南通西马特机器制造有限公司 Single-handle operated 12-level gear shift mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103758946A (en) * 2014-01-22 2014-04-30 南通西马特机器制造有限公司 Single-handle operated 12-level gear shift mechanism

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