GB542724A - Improvements in or relating to pawl and ratchet devices particularly for brakes of motor vehicles - Google Patents

Improvements in or relating to pawl and ratchet devices particularly for brakes of motor vehicles

Info

Publication number
GB542724A
GB542724A GB32806/39A GB3280639A GB542724A GB 542724 A GB542724 A GB 542724A GB 32806/39 A GB32806/39 A GB 32806/39A GB 3280639 A GB3280639 A GB 3280639A GB 542724 A GB542724 A GB 542724A
Authority
GB
United Kingdom
Prior art keywords
pawl
bar
rod
brake
ratchet
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
GB32806/39A
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.)
GEORG ENGLEBREKT OHLSON
Original Assignee
GEORG ENGLEBREKT OHLSON
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 GEORG ENGLEBREKT OHLSON filed Critical GEORG ENGLEBREKT OHLSON
Publication of GB542724A publication Critical patent/GB542724A/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
    • F16D65/00—Parts or details
    • F16D65/38—Slack adjusters
    • F16D65/40—Slack adjusters mechanical
    • F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
    • F16D65/54—Slack adjusters mechanical self-acting in one direction for adjusting excessive play by means of direct linear adjustment
    • 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
    • F16B1/00—Devices for securing together, or preventing relative movement between, constructional elements or machine parts
    • 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
    • F16H25/2025—Screw mechanisms with means to disengage the nut or screw from their counterpart; Means for connecting screw and nut for stopping reciprocating movement

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

542,724. Pawl and ratchet mechanism. OHLSON, G. E. Dec. 22, 1939, No. 32806. Convention date, Jan. 2, [Class 80 (iii)] [Also in Group XXXIV] A ratchet and pawl device of the type comprising a screw-threaded ratchet bar so that the pawl may be displaced along the bar by rotating the bar as well as by a sliding action comprises a carrier having a tubular part 5 slidable on the screw-threaded ratchet bar 1 and a tubular guide 6 in which the toothed pawl 2 is slidable. The angle v between the guide and the bar is such that the pawl and carrier are self-locking relatively to the bar as regards movement in the direction of the arrow s. The device is particularly suitable for automatic slack adjusting mechanism for brakes. The Specification as open to inspection under Sect. 91 describes also automatic slack adjusting mechanism for, brakes comprising a pair of pawl devises 10, 12, such as above described adapted to engage the threaded bar 14 which is connected at one end 40 to the brake. The pawl 12 is pivoted at 30 to the forked end of a rod 28 connected to a pedal 26 and a pawl 10 is secured to a rod 16 provided with stops 22, 24 for co-operation with a fixed stop 20. In applying the brake the fall on the rod 28 is transmitted to the bar 14 and the brake by the pawl 12 and the pawl 10 and rod 16 are carried along by the bar 14. If the clearance between the brake shoes and the brake drum is excessive, the stop 22 engages the stop 20 so that the bar 14 slides relatively to the pawl 10. During release, the bar returns the distance determined by re-engagement of the stops 24, 20 and the pawl 12 slides on the bar under the action of the springs 36 until it abuts the pawl 10 as shown. The effective length of the bar and the rod 28 is thus shortened. The pawl 12 has a pin 60 that runs in a slot in the pawl 10. The stop 22 may be clamped to the rod 16 so as to yield under excessive force. Manual adjustment may be effected by rotating the bar 14, the connection 40 between the bar and a rod 38 connected to the brake permitting the rotation. In a modification, the bar 14 and rod 28 operate under pressure instead of in tension and the effective length thereof is lengthened to reduce the brake clearance. This subject-matter does not appear in the Specification as accepted.
GB32806/39A 1939-01-02 1939-12-22 Improvements in or relating to pawl and ratchet devices particularly for brakes of motor vehicles Expired GB542724A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE542724X 1939-01-02

Publications (1)

Publication Number Publication Date
GB542724A true GB542724A (en) 1942-01-26

Family

ID=20311615

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32806/39A Expired GB542724A (en) 1939-01-02 1939-12-22 Improvements in or relating to pawl and ratchet devices particularly for brakes of motor vehicles

Country Status (1)

Country Link
GB (1) GB542724A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2558958A (en) * 1946-03-09 1951-07-03 Houdaille Hershey Corp Brake lever structure
US2716352A (en) * 1950-08-31 1955-08-30 Rca Corp Adjusting and locking device
FR2300687A1 (en) * 1975-02-17 1976-09-10 Bromsregulator Svenska Ab FLUIDICALLY CONTROLLED CYLINDER AND PISTON GROUP

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2558958A (en) * 1946-03-09 1951-07-03 Houdaille Hershey Corp Brake lever structure
US2716352A (en) * 1950-08-31 1955-08-30 Rca Corp Adjusting and locking device
FR2300687A1 (en) * 1975-02-17 1976-09-10 Bromsregulator Svenska Ab FLUIDICALLY CONTROLLED CYLINDER AND PISTON GROUP

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