GB2045370A - Centrifugal brake - Google Patents

Centrifugal brake Download PDF

Info

Publication number
GB2045370A
GB2045370A GB7846879A GB7846879A GB2045370A GB 2045370 A GB2045370 A GB 2045370A GB 7846879 A GB7846879 A GB 7846879A GB 7846879 A GB7846879 A GB 7846879A GB 2045370 A GB2045370 A GB 2045370A
Authority
GB
United Kingdom
Prior art keywords
shaft
spool
bush
spring
shoes
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.)
Withdrawn
Application number
GB7846879A
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.)
Skipper W B
Original Assignee
Skipper W B
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 Skipper W B filed Critical Skipper W B
Priority to GB7846879A priority Critical patent/GB2045370A/en
Publication of GB2045370A publication Critical patent/GB2045370A/en
Withdrawn legal-status Critical Current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
    • F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed

Landscapes

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

Abstract

The brake acts on a rotary shaft 1 to which is keyed a spool 5; two or more friction lined shoes 4 are pivoted in spool 5 and act on a stationary drum 2 under centrifugal force. This force is opposed by torsional load of a spring 8 which is varied according to the angular position of a bush 9 which is free to rotate on shaft 1. <IMAGE>

Description

SPECIFICATION Adjustable centrifugal brake The invention is shown on the accompanying sketch, and provides:- A rotatable shaft 1 which connected to the mechanism to be retarded in a suitable manner. A stationary brake drum 2 which has a bearing 3 to support shaft 1. Two (or more) friction lined shoes 4 pivoted in spool 5 which is keyed to shaft 1. The shoes have projecting pins 6 which protrude through elongated slots in spool 5. The pins 6 engage in grooves in member 7 which is free to rotate on shaft 1. A helical spring 8 is fixed at each end to member 7 and bush 9 which is free to rotate on shaft 1. One end of bush 9 has a series of radial grooves which engage on a pin 10 which is fitted in shaft 1. It will be seen that spring 8 acts in torsion and in addition applies force to member 7 in the direction of the arrow.
OPERATION As shaft 1 is rotated the shoes bear against drum 2 under the influence of centrifugal force.
This force is opposed by the torsional load of spring 8 which is varied according to the angular position of bush 9.
CLAIM
1. A centrifugal brake substantially as drawn having a rotatable shaft, a spool fixed to said shaft and a stationary brake drum encompassing spool.
One or more friction faced shoes pivoted in spool and engaging with a spring loaded spider member.
A spring anchor bush engaging with fixed bush.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (1)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    SPECIFICATION Adjustable centrifugal brake The invention is shown on the accompanying sketch, and provides:- A rotatable shaft 1 which connected to the mechanism to be retarded in a suitable manner. A stationary brake drum 2 which has a bearing 3 to support shaft 1. Two (or more) friction lined shoes 4 pivoted in spool 5 which is keyed to shaft 1. The shoes have projecting pins 6 which protrude through elongated slots in spool 5. The pins 6 engage in grooves in member 7 which is free to rotate on shaft 1. A helical spring 8 is fixed at each end to member 7 and bush 9 which is free to rotate on shaft 1. One end of bush 9 has a series of radial grooves which engage on a pin 10 which is fitted in shaft 1. It will be seen that spring 8 acts in torsion and in addition applies force to member 7 in the direction of the arrow.
    OPERATION As shaft 1 is rotated the shoes bear against drum 2 under the influence of centrifugal force.
    This force is opposed by the torsional load of spring 8 which is varied according to the angular position of bush 9.
    CLAIM
    1. A centrifugal brake substantially as drawn having a rotatable shaft, a spool fixed to said shaft and a stationary brake drum encompassing spool.
    One or more friction faced shoes pivoted in spool and engaging with a spring loaded spider member.
    A spring anchor bush engaging with fixed bush.
GB7846879A 1978-12-01 1978-12-01 Centrifugal brake Withdrawn GB2045370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7846879A GB2045370A (en) 1978-12-01 1978-12-01 Centrifugal brake

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7846879A GB2045370A (en) 1978-12-01 1978-12-01 Centrifugal brake

Publications (1)

Publication Number Publication Date
GB2045370A true GB2045370A (en) 1980-10-29

Family

ID=10501476

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7846879A Withdrawn GB2045370A (en) 1978-12-01 1978-12-01 Centrifugal brake

Country Status (1)

Country Link
GB (1) GB2045370A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6457569B2 (en) * 1999-10-27 2002-10-01 Otis Elevator Company Rotary actuated overspeed safety device
GB2354298B (en) * 1998-05-12 2002-12-04 Weatherford Canada Ltd Centrifugal backspin retarder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2354298B (en) * 1998-05-12 2002-12-04 Weatherford Canada Ltd Centrifugal backspin retarder
US6457569B2 (en) * 1999-10-27 2002-10-01 Otis Elevator Company Rotary actuated overspeed safety device

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)