GB932709A - Improvements in or relating to brakes - Google Patents

Improvements in or relating to brakes

Info

Publication number
GB932709A
GB932709A GB1063960A GB1063960A GB932709A GB 932709 A GB932709 A GB 932709A GB 1063960 A GB1063960 A GB 1063960A GB 1063960 A GB1063960 A GB 1063960A GB 932709 A GB932709 A GB 932709A
Authority
GB
United Kingdom
Prior art keywords
shoe
force
brake
lever
roller
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
GB1063960A
Inventor
Daniel Cowan Johnson
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB1063960A priority Critical patent/GB932709A/en
Priority to BE601694A priority patent/BE601694A/en
Publication of GB932709A publication Critical patent/GB932709A/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
    • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D51/46—Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action
    • F16D51/66—Self-tightening brakes with pivoted brake shoes, i.e. the braked member increases the braking action an actuated brake-shoe being carried along and thereby engaging a member for actuating another brake-shoe
    • 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
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/24—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member
    • F16D55/46—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member with self-tightening action

Landscapes

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

Abstract

932,709. Self-servo brakes. NATIONAL RESEARCH DEVELOPMENT CORPORATION. March 7, 1961 [March 25, 1960], No. 10639/60. Class 103 (1). In a self-servo brake of the type wherein the movement of a primary shoe incident to frictional engagement with a drum or other braking surface is utilized to force a secondary shoe or shoes into engagement with the braking surface, means is provided whereby negative feed-back is applied to the operating force on the primary shoe. In the diagrammatic form illustrated in Fig. 1, a primary shoe A and a secondary shoe B co-operate with a braking surface X which may be a disc or drum. A force F is applied via a roller R to the shoe A which is capable of movement in the direction of movement of surface X. Roller R is carried by a lever arm E of a bell-crank, the other arm E<SP>1</SP> of which is engaged by the shoe B which is also capable of movement in the direction of movement of surface X. Frictional drag of shoe A is transmitted by a lever C and link D to the shoe B to apply shoe B with a greater force than shoe A, while the drag of shoe B gives a reduced feed-back force acting on the roller R in the opposite direction to force F via the lever arms E, E<SP>1</SP>. As applied to a drum brake, Fig. 3, the bell-crank comprising arms E, E<SP>1</SP> is pivoted on a bearing E<SP>2</SP> and acted on by a force in the direction of arrow F by an hydraulic cylinder (not shown). Lever arm E carries roller R engaging floating shoe A which has a roller A<SP>1</SP> at its trailing end engaging a lever H journalled on the axis of the brake. A cam H<SP>2</SP> rotates with the lever H and operates a lever J pivoted at J<SP>1</SP> and connected by a link J<SP>3</SP> to the floating shoe B. The opposite end of shoe B carries a roller B<SP>1</SP> acting on the arm E<SP>1</SP>. The Specification includes formulµ to show that the brake can be made to give a gain of five over a simple brake and yet be two and a half times less sensitive to changes of the coefficient of friction during braking than the simple brake, while the movement of the applying force for a given degree of braking is about one-third of that of the simple brake, allowing more mechanical advantage to be employed in the transmission from the brake pedal.
GB1063960A 1960-03-25 1960-03-25 Improvements in or relating to brakes Expired GB932709A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1063960A GB932709A (en) 1960-03-25 1960-03-25 Improvements in or relating to brakes
BE601694A BE601694A (en) 1960-03-25 1961-03-23 Brake improvements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1063960A GB932709A (en) 1960-03-25 1960-03-25 Improvements in or relating to brakes

Publications (1)

Publication Number Publication Date
GB932709A true GB932709A (en) 1963-07-31

Family

ID=9971562

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1063960A Expired GB932709A (en) 1960-03-25 1960-03-25 Improvements in or relating to brakes

Country Status (2)

Country Link
BE (1) BE601694A (en)
GB (1) GB932709A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456102A (en) * 1978-11-10 1984-06-26 Josef Peitz Overrunning wheel brake

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456102A (en) * 1978-11-10 1984-06-26 Josef Peitz Overrunning wheel brake

Also Published As

Publication number Publication date
BE601694A (en) 1961-07-17

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