GB875483A - Improvements in or relating to overload release devices - Google Patents

Improvements in or relating to overload release devices

Info

Publication number
GB875483A
GB875483A GB484757A GB484757A GB875483A GB 875483 A GB875483 A GB 875483A GB 484757 A GB484757 A GB 484757A GB 484757 A GB484757 A GB 484757A GB 875483 A GB875483 A GB 875483A
Authority
GB
United Kingdom
Prior art keywords
output
input
axially
overload release
pawl
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
GB484757A
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.)
Campbell & Isherwood Ltd
Original Assignee
Campbell & Isherwood 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 Campbell & Isherwood Ltd filed Critical Campbell & Isherwood Ltd
Priority to GB484757A priority Critical patent/GB875483A/en
Publication of GB875483A publication Critical patent/GB875483A/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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D43/00—Automatic clutches
    • F16D43/02—Automatic clutches actuated entirely mechanically
    • F16D43/20—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure
    • F16D43/202—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure of the ratchet type
    • F16D43/204—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure of the ratchet type with intermediate balls or rollers
    • F16D43/206—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure of the ratchet type with intermediate balls or rollers moving axially between engagement and disengagement

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)

Abstract

875,483. Overload release clutches. CAMPBELL & ISHERWOOD Ltd., and MEREDITH, J. Feb. 12, 1958 [Feb. 13, 1957], No. 4847/57. Class 80 (2). In an overload release clutch of the kind in which an axially slidable member 14, in helically splined engagement 13, 15 with axially fixed input and output members 12, 16 respectively, can, under overload, overcome with a snap action a spring-loaded ball arrangement 22, 23 to move axially left and break the splined drive connection 15 with the output member 16 only, resetting means comprise a pawl 28 on the member 14 permanently engaging an output mounted ratchet 33 to prevent backward movement of the member 14 relative to the load whilst the input member 12 is rotated backwards by a pawl-carrying handlever (not shown) engaged with an input mounted ratchet 31. The backward input rotation acts through the helical spline 13 to move the member 14 axially back to the right to re-engage the output helical splines 15. The ratchet ring 33 is helically splined on the output member to turn and slide with the member 14. The torque-supporting loading of the axially movable member 14 comprises an adjustably spring-loaded centre ball 23 engaging outer balls 22 bearing in a chamfer 21 in the member 14 to produce the required snap disengagement. The leftward movement of the centre ball 23 moves left a rod 38 which engages an offset bore in a member 35 to pivot the latter which operates a switch 32 which may control an alarm or may serve as a relay for stopping the driving motor. The input member 12 is secured to a driving sprocket 10 and the output 16 to a shaft 11 driving a winch. Specifications 636,404 and 733,742 are referred to.
GB484757A 1957-02-13 1957-02-13 Improvements in or relating to overload release devices Expired GB875483A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB484757A GB875483A (en) 1957-02-13 1957-02-13 Improvements in or relating to overload release devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB484757A GB875483A (en) 1957-02-13 1957-02-13 Improvements in or relating to overload release devices

Publications (1)

Publication Number Publication Date
GB875483A true GB875483A (en) 1961-08-23

Family

ID=9784914

Family Applications (1)

Application Number Title Priority Date Filing Date
GB484757A Expired GB875483A (en) 1957-02-13 1957-02-13 Improvements in or relating to overload release devices

Country Status (1)

Country Link
GB (1) GB875483A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3260334A (en) * 1964-07-13 1966-07-12 Ling Temco Vought Inc Overrideable ball clutch
US4155275A (en) * 1976-09-15 1979-05-22 Devanney Raymond H Controlled torque output tool
WO1989011167A1 (en) * 1988-05-02 1989-11-16 Nippon Antenna Company Limited Device for automatically expanding and contracting antenna

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3260334A (en) * 1964-07-13 1966-07-12 Ling Temco Vought Inc Overrideable ball clutch
US4155275A (en) * 1976-09-15 1979-05-22 Devanney Raymond H Controlled torque output tool
WO1989011167A1 (en) * 1988-05-02 1989-11-16 Nippon Antenna Company Limited Device for automatically expanding and contracting antenna
US5155496A (en) * 1988-05-02 1992-10-13 Nippon Antenna Company Limited Device for automatically expanding and contracting antenna

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