GB562248A - Improvements in or relating to screws and nuts - Google Patents
Improvements in or relating to screws and nutsInfo
- Publication number
- GB562248A GB562248A GB15792/42A GB1579242A GB562248A GB 562248 A GB562248 A GB 562248A GB 15792/42 A GB15792/42 A GB 15792/42A GB 1579242 A GB1579242 A GB 1579242A GB 562248 A GB562248 A GB 562248A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spanner
- nuts
- screws
- nut
- engagement
- 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
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 230000000630 rising effect 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
- F16B23/0076—Specially shaped nuts or heads of bolts or screws for rotations by a tool causing slipping of the tool in loosening rotation, i.e. disabling unscrewing unless another tool is used
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
562,248. Screws and nuts. SULZER FRERES SOC. ANON. Nov. 9, 1942, No. 15792. Convention date, Dec. 9,1941. [Classes 89 (i) and 89 (ii)] Screws and nuts have heads so formed that a spanner can be employed to loosen but cannot be used to tighten them. A nut has a wavy edge 1 to permit screwing up by hand. Projections 6 rising from the nut have flats 7 for engagement by an open jawed spanner in the direction of the arrow 3. If the.spanner be turned in the reverse direction, cam surfaces 8 effect the disengagement of the spanner and nut A modified form is illustrated in which screw head has a recess for unscrewing engagement by a hexagonal wrench.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH562248X | 1941-12-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB562248A true GB562248A (en) | 1944-06-23 |
Family
ID=4520381
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB15792/42A Expired GB562248A (en) | 1941-12-09 | 1942-11-09 | Improvements in or relating to screws and nuts |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH225018A (en) |
FR (1) | FR891717A (en) |
GB (1) | GB562248A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2777353A (en) * | 1952-10-30 | 1957-01-15 | Robert W Willis | Screw socket construction having tool guiding means formed therein |
US4125051A (en) * | 1977-06-09 | 1978-11-14 | Illinois Tool Works Inc. | Tamperproof fastener |
GB2149872A (en) * | 1983-11-17 | 1985-06-19 | Peter John Gill | Tamper resistant fasteners |
ES2353182A1 (en) * | 2010-09-10 | 2011-02-28 | Ridelin S.L. | Tightening element for electrical connector. (Machine-translation by Google Translate, not legally binding) |
WO2015005478A1 (en) * | 2013-07-12 | 2015-01-15 | 日東精工株式会社 | Fastening tool with tamper-proof drive hole |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1057395B (en) * | 1956-06-07 | 1959-05-14 | Kellermann Fa Rudolf | Over-rotation protection for head screws or nuts |
-
1941
- 1941-12-09 CH CH225018D patent/CH225018A/en unknown
-
1942
- 1942-11-09 GB GB15792/42A patent/GB562248A/en not_active Expired
- 1942-11-09 FR FR891717D patent/FR891717A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2777353A (en) * | 1952-10-30 | 1957-01-15 | Robert W Willis | Screw socket construction having tool guiding means formed therein |
US4125051A (en) * | 1977-06-09 | 1978-11-14 | Illinois Tool Works Inc. | Tamperproof fastener |
GB2149872A (en) * | 1983-11-17 | 1985-06-19 | Peter John Gill | Tamper resistant fasteners |
ES2353182A1 (en) * | 2010-09-10 | 2011-02-28 | Ridelin S.L. | Tightening element for electrical connector. (Machine-translation by Google Translate, not legally binding) |
WO2015005478A1 (en) * | 2013-07-12 | 2015-01-15 | 日東精工株式会社 | Fastening tool with tamper-proof drive hole |
JP2015017685A (en) * | 2013-07-12 | 2015-01-29 | 日東精工株式会社 | Fastener with tamper-proof drive hole |
Also Published As
Publication number | Publication date |
---|---|
CH225018A (en) | 1942-12-31 |
FR891717A (en) | 1944-03-17 |
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