GB639035A - Improvements in or relating to hand or power fed boring bars - Google Patents
Improvements in or relating to hand or power fed boring barsInfo
- Publication number
- GB639035A GB639035A GB1183348A GB1183348A GB639035A GB 639035 A GB639035 A GB 639035A GB 1183348 A GB1183348 A GB 1183348A GB 1183348 A GB1183348 A GB 1183348A GB 639035 A GB639035 A GB 639035A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nut
- boring
- pawl
- bar
- lead
- 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
- B23Q9/00—Arrangements for supporting or guiding portable metal-working machines or apparatus
-
- 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
- B23Q2709/00—Portable machines or devices for the cylindrical bores of valve bodies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
Abstract
639,035. Portable boring-bar machines. WARD, M. M. April 30, 1948, No. 11833. [Class 83 (iii)] A boring-bar 10 of the kind which is fed by means of a nut 27 mounted on a lead-screw 22, the nut being rotated by pawl-and-ratchet mechanism including a toothed wheel 28 rotating with the nut, and the pawl 36 being reciprocated by an eccentric 31 on the boring- bar, is characterized in that the lead-screw is held against rotation by readily releasable. locking means, the pawl is arranged to be rendered easily inoperative, and means are provided for resisting rotation of the nut, so that the boring-bar can be fed by rotating the leadscrew. The locking means comprises a pin 50 movable into or out of a recess in a graduated dial 49 provided on the lead-screw, the dial co-operating with an index on a bracket 24 to indicate the amount of feed. The means for resisting rotation of the nut comprises a spring- pressed plunger 43 adapted to enter the spaces between the teeth of the wheel 28. The pawl 36 forms part of a spring-pressed plunger 35 mounted in a carrier' 29 and carrying a pin 38 engageable with either of two perpendicular grooves 39, 40 in the carrier so that the pawl can be readily disengaged from the wheel 28. The boring-bar is journalled in a frame 16 movable along the lead screw. In a modification, Fig. 6 (not shown), a friction brake is provided between the nut and the frame.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1183348A GB639035A (en) | 1948-04-30 | 1948-04-30 | Improvements in or relating to hand or power fed boring bars |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1183348A GB639035A (en) | 1948-04-30 | 1948-04-30 | Improvements in or relating to hand or power fed boring bars |
Publications (1)
Publication Number | Publication Date |
---|---|
GB639035A true GB639035A (en) | 1950-06-21 |
Family
ID=9993558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1183348A Expired GB639035A (en) | 1948-04-30 | 1948-04-30 | Improvements in or relating to hand or power fed boring bars |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB639035A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6721367B1 (en) * | 1998-11-10 | 2004-04-13 | Matsushita Electric Industrial Co., Ltd. | Base station apparatus and radio communication method |
-
1948
- 1948-04-30 GB GB1183348A patent/GB639035A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6721367B1 (en) * | 1998-11-10 | 2004-04-13 | Matsushita Electric Industrial Co., Ltd. | Base station apparatus and radio communication method |
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