GB530280A - Improvements in and relating to screws - Google Patents
Improvements in and relating to screwsInfo
- Publication number
- GB530280A GB530280A GB1800639A GB1800639A GB530280A GB 530280 A GB530280 A GB 530280A GB 1800639 A GB1800639 A GB 1800639A GB 1800639 A GB1800639 A GB 1800639A GB 530280 A GB530280 A GB 530280A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screw
- thread
- work
- screws
- steele
- 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
- 238000010079 rubber tapping Methods 0.000 abstract 2
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
- F16B25/0021—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being metal, e.g. sheet-metal or aluminium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
- F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
- F16B25/0047—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the ridge being characterised by its cross-section in the plane of the shaft axis
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
530,280. Self-tapping screws. STEELE. V. W., and STEELE, W. H. June 20, 1939, No. 18006. [Class 83 (iii)] A self-tapping screw has the shank composed of a leading part 4 of diameter slightly less than that of the hole into which it is to be inserted and a following portion 5 of smaller diameter than the portion 4. The two portions may merge into each other at 6, 7 or may be separated by a step. The thread 8, which may be single or multiple, increases uniformly or otherwise from the start 10 to a point 9, after which it remains parallel. The screw may have a plain portion between the threaded part and the head, this plain portion being adapted to engage an enlarged hole in the work and having a diameter equal to or greater than the tops of the thread 8. The forward end of the screw may extend beyond the end 10 of the thread and may be tapered as at 11 or pointed. The screws may be screwed directly into the work or may co-operate with unthreaded nuts and may be partly or wholly hardened. According to the Provisional Specification the portions 4, 5 may be united by an inclined shoulder which will have the effect of removing the thread formed in the work when the screw is reversely rotated, thereby allowing removal of the screw.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1800639A GB530280A (en) | 1939-06-20 | 1939-06-20 | Improvements in and relating to screws |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1800639A GB530280A (en) | 1939-06-20 | 1939-06-20 | Improvements in and relating to screws |
Publications (1)
Publication Number | Publication Date |
---|---|
GB530280A true GB530280A (en) | 1940-12-09 |
Family
ID=10105002
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1800639A Expired GB530280A (en) | 1939-06-20 | 1939-06-20 | Improvements in and relating to screws |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB530280A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3172170A (en) * | 1961-09-18 | 1965-03-09 | D B Frampton & Company | Composite wood panel |
EP0207862A1 (en) * | 1985-07-05 | 1987-01-07 | LAURENT INDUSTRIE S.A. Société dite: | Threaded bar like a screw and process for making the same |
DE19611678A1 (en) * | 1995-04-06 | 1996-10-10 | Otto Ziel Schraubenfabrik Gmbh | Screw for chipboard panels, with single or multi-hand thread |
-
1939
- 1939-06-20 GB GB1800639A patent/GB530280A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3172170A (en) * | 1961-09-18 | 1965-03-09 | D B Frampton & Company | Composite wood panel |
EP0207862A1 (en) * | 1985-07-05 | 1987-01-07 | LAURENT INDUSTRIE S.A. Société dite: | Threaded bar like a screw and process for making the same |
FR2584464A1 (en) * | 1985-07-05 | 1987-01-09 | Laurent Sa | THREADED ROD, SUCH AS A SCREW, AND METHOD FOR MANUFACTURING THE SAME |
DE19611678A1 (en) * | 1995-04-06 | 1996-10-10 | Otto Ziel Schraubenfabrik Gmbh | Screw for chipboard panels, with single or multi-hand thread |
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