GB652199A - Improvements relating to screw-jack and like mechanisms - Google Patents

Improvements relating to screw-jack and like mechanisms

Info

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
Application number
GB33168/48A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JOHN WESTLEY BOUCHER
Mb Wild & Co Ltd
Original Assignee
JOHN WESTLEY BOUCHER
Mb Wild & Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JOHN WESTLEY BOUCHER, Mb Wild & Co Ltd filed Critical JOHN WESTLEY BOUCHER
Priority to GB33168/48A priority Critical patent/GB652199A/en
Publication of GB652199A publication Critical patent/GB652199A/en
Expired legal-status Critical Current

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.
GB33168/48A 1948-12-23 1948-12-23 Improvements relating to screw-jack and like mechanisms Expired GB652199A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (7)

* Cited by examiner, † Cited by third party
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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