GB429741A - Change-speed gearing for lathes and other machine-tools - Google Patents
Change-speed gearing for lathes and other machine-toolsInfo
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, 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
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
- B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
- B23Q5/12—Mechanical drives with means for varying the speed ratio
- B23Q5/14—Mechanical drives with means for varying the speed ratio step-by-step
- B23Q5/142—Mechanical drives with means for varying the speed ratio step-by-step mechanically-operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, 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
- B23Q2705/00—Driving working spindles or feeding members carrying tools or work
- B23Q2705/02—Driving working spindles
- B23Q2705/06—Mechanical drives with means for varying the speed ratio
- B23Q2705/062—Mechanical drives with means for varying the speed ratio for lathes
- B23Q2705/064—Mechanical 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.
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)
| 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 |
-
1934
- 1934-12-14 GB GB3590834A patent/GB429741A/en not_active Expired
Cited By (1)
| 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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