GB652199A - Improvements relating to screw-jack and like mechanisms - Google Patents
Improvements relating to screw-jack and like mechanismsInfo
- Publication number
- GB652199A GB652199A GB33168/48A GB3316848A GB652199A GB 652199 A GB652199 A GB 652199A GB 33168/48 A GB33168/48 A GB 33168/48A GB 3316848 A GB3316848 A GB 3316848A GB 652199 A GB652199 A GB 652199A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screw
- nut
- jack
- socket
- axially
- 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
-
- 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
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
- F16H25/2472—Safety nuts
-
- 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
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2062—Arrangements for driving the actuator
- F16H2025/2093—Arrangements for driving the actuator using conical gears
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
652,199. Lifting-jacks. WILD & CO., Ltd., M. B., and BOUCHER, J. W. Dec. 23, 1948, No. 33168. [Class 78 (iii)] [Also in Group XXIV] In a screw jack, clamping means in engagement with the screw is adapted to co-operate with a part formed on or secured to the nut so that in the event of relative free axial movement of the nut and screw consequent upon stripping of the thread of the nut, the clamping means becomes wedged between the screw and the said part, thereby rendering the jack inoperative. Fig. 1 shows the application to a jack comprising a nut b axially movable along a screw a rotated by gear-wheels h. A member d engaging the screw is located in a socket c formed in the nut and is held in position by a cover e and secured against rotation by pegs g. In the event of stripping of the threads of the nut b, the nut slips axially to a small extent relatively to the screw whereby the member d becomes wedged between the socket and screw so as to stop rotation of the screw. The member d comprises two parts held together by a spring f. Fig. 2 shows the application to a jack comprising an axially-movable but non-rotatable screw a and a nut b rotated by gear-wheels h. The socket c is secured to the nut by bolts i and the member d is connected to the socket by a peg g.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB33168/48A GB652199A (en) | 1948-12-23 | 1948-12-23 | Improvements relating to screw-jack and like mechanisms |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB33168/48A GB652199A (en) | 1948-12-23 | 1948-12-23 | Improvements relating to screw-jack and like mechanisms |
Publications (1)
Publication Number | Publication Date |
---|---|
GB652199A true GB652199A (en) | 1951-04-18 |
Family
ID=10349430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB33168/48A Expired GB652199A (en) | 1948-12-23 | 1948-12-23 | Improvements relating to screw-jack and like mechanisms |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB652199A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3176963A (en) * | 1962-03-23 | 1965-04-06 | Joyce Cridland Co | Safety jack with auxiliary safety nut |
US3323777A (en) * | 1964-10-28 | 1967-06-06 | Duff Norton Co | Anti-backlash worm gear jack |
EP0297864A1 (en) * | 1987-07-03 | 1989-01-04 | John Charles Payne | Safety device |
EP0311478A1 (en) * | 1987-10-08 | 1989-04-12 | Rockwell Automotive Body Systems-France En Abrege:Rockwell Abs-France | Overload-protected screw jack for an adjustable device such as a seat |
EP2143974A1 (en) * | 2008-07-11 | 2010-01-13 | GymnalUniphy | Linear actuator, device for supporting a person, method for strengthening a linear actuator and safety element |
-
1948
- 1948-12-23 GB GB33168/48A patent/GB652199A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3176963A (en) * | 1962-03-23 | 1965-04-06 | Joyce Cridland Co | Safety jack with auxiliary safety nut |
US3323777A (en) * | 1964-10-28 | 1967-06-06 | Duff Norton Co | Anti-backlash worm gear jack |
EP0297864A1 (en) * | 1987-07-03 | 1989-01-04 | John Charles Payne | Safety device |
US4962674A (en) * | 1987-07-03 | 1990-10-16 | Payne John C | Safety device |
EP0311478A1 (en) * | 1987-10-08 | 1989-04-12 | Rockwell Automotive Body Systems-France En Abrege:Rockwell Abs-France | Overload-protected screw jack for an adjustable device such as a seat |
FR2621666A1 (en) * | 1987-10-08 | 1989-04-14 | Rockwell Cim | OVERLOAD SECURITY SCREW FOR A MOVABLE ELEMENT, SUCH AS A SEAT |
EP2143974A1 (en) * | 2008-07-11 | 2010-01-13 | GymnalUniphy | Linear actuator, device for supporting a person, method for strengthening a linear actuator and safety element |
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