GB581942A - Means of uniting a screw with a driver - Google Patents
Means of uniting a screw with a driverInfo
- Publication number
- GB581942A GB581942A GB771844A GB771844A GB581942A GB 581942 A GB581942 A GB 581942A GB 771844 A GB771844 A GB 771844A GB 771844 A GB771844 A GB 771844A GB 581942 A GB581942 A GB 581942A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screw
- convergence
- grooves
- angle
- uniting
- 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
- 230000001154 acute effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
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
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
- F16B23/0023—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially cross-shaped
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Connection Of Plates (AREA)
Abstract
581,942. Screws and screwdrivers. DEHN, F. B. (Phillips Screw Co.). April 25, 1944, No. 7718. [Class 89 (ii)] [Also in Group XXIII] The conical socket in a screw head 5 has alternate straight tapering ridges and grooves and the end of the screwdriver 1 has corresponding ribs and plates 2, 3, the angle of convergence of the opposite edges of the ribs being slightly more acute than the angle of convergence of the opposite side walls of the grooves to produce a binding effect between the engaging portions. Specification 446,714 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB771844A GB581942A (en) | 1944-04-25 | 1944-04-25 | Means of uniting a screw with a driver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB771844A GB581942A (en) | 1944-04-25 | 1944-04-25 | Means of uniting a screw with a driver |
Publications (1)
Publication Number | Publication Date |
---|---|
GB581942A true GB581942A (en) | 1946-10-30 |
Family
ID=9838421
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB771844A Expired GB581942A (en) | 1944-04-25 | 1944-04-25 | Means of uniting a screw with a driver |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB581942A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2684526A (en) * | 1951-07-06 | 1954-07-27 | Hoover John Dean | Method for backing off broken studs |
-
1944
- 1944-04-25 GB GB771844A patent/GB581942A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2684526A (en) * | 1951-07-06 | 1954-07-27 | Hoover John Dean | Method for backing off broken studs |
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