GB449121A - Improvements in or relating to screw-thread cutting devices for lathes - Google Patents
Improvements in or relating to screw-thread cutting devices for lathesInfo
- Publication number
- GB449121A GB449121A GB2206235A GB2206235A GB449121A GB 449121 A GB449121 A GB 449121A GB 2206235 A GB2206235 A GB 2206235A GB 2206235 A GB2206235 A GB 2206235A GB 449121 A GB449121 A GB 449121A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screw
- thread cutting
- dogs
- driving member
- tools
- 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
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/02—Thread cutting; Automatic machines specially designed therefor on an external or internal cylindrical or conical surface, e.g. on recesses
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turning (AREA)
Abstract
449,121. Screwing; tapping. B.S.A. TOOLS, Ltd., Armoury Road, Small Heath, and OGILVIE, W., c/o B.S.A. Tools, Ltd., Montgomery Street, Sparkbrook, both in Birmingham. Aug. 3, 1935, No. 22062. [Class 83 (iii)] In screw-thread cutting devices wherein the die or tap-holder is rotated in the same direction as the work but at a greater speed for cutting, and is stopped for unscrewing, a detachable toolhead 14, Fig. 2, is provided comprising a constantly rotating driving member 12 provided with a clutch face or dogs 20, Fig. 3, a revoluble and longitudinally movable driven member 22 having dogs to engage the driving member, and under the action of a spring 28, the driven member being further provided with a clutch face 29 engaging a similar face on the fixed body part 30 which retards its rotation when moved to the left out of engagement with the driving member and serves to withdraw the screwing tool 25. Towards the end of a screw-thread cutting operation the longitudinal motion of the turret carrying the device is arrested, but the forward pull of the work on the tool continues and disengages the driving and driven members, moving the latter against the brake surface 30. A ring-shaped cam-member 32 which is thereby released is urged around by a peripheral spring 38 to force the driven member against the brake surface. The cam member is automatically re-set on retracting the turret by a stop 43 which engages a lever 45 projecting from the screw-cutting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2206235A GB449121A (en) | 1935-08-03 | 1935-08-03 | Improvements in or relating to screw-thread cutting devices for lathes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2206235A GB449121A (en) | 1935-08-03 | 1935-08-03 | Improvements in or relating to screw-thread cutting devices for lathes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB449121A true GB449121A (en) | 1936-06-22 |
Family
ID=10173284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2206235A Expired GB449121A (en) | 1935-08-03 | 1935-08-03 | Improvements in or relating to screw-thread cutting devices for lathes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB449121A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2405778A1 (en) * | 1977-10-11 | 1979-05-11 | Ruland Frederick | TAPPING DEVICE FOR MACHINE-TOOL |
-
1935
- 1935-08-03 GB GB2206235A patent/GB449121A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2405778A1 (en) * | 1977-10-11 | 1979-05-11 | Ruland Frederick | TAPPING DEVICE FOR MACHINE-TOOL |
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