GB627559A - Improvements in braking mechanisms - Google Patents

Improvements in braking mechanisms

Info

Publication number
GB627559A
GB627559A GB485246A GB485246A GB627559A GB 627559 A GB627559 A GB 627559A GB 485246 A GB485246 A GB 485246A GB 485246 A GB485246 A GB 485246A GB 627559 A GB627559 A GB 627559A
Authority
GB
United Kingdom
Prior art keywords
brake
piston
valve
pressure
cylinder
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
GB485246A
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.)
HUGH HERBERT FOSTER
General Electric Co PLC
Original Assignee
HUGH HERBERT FOSTER
General Electric Co PLC
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 HUGH HERBERT FOSTER, General Electric Co PLC filed Critical HUGH HERBERT FOSTER
Priority to GB485246A priority Critical patent/GB627559A/en
Publication of GB627559A publication Critical patent/GB627559A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/24—Operating devices
    • B66D5/26—Operating devices pneumatic or hydraulic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/03—Mechanisms with latches or braking devices in general for capstans, hoists or similar devices as well as braking devices actuated electrically or by fluid under pressure
    • B66D2700/035—Fluid operated braking devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

627,559. Fluid-pressure controlled brakes. GENERAL ELECTRIC CO., Ltd., and FOSTER, R. T., [Representative of FOSTER, H. H.]. Feb. 15, 1946, No. 4852. [Class 103 (i)] In a brake control system in which the brake is normally applied by fluid pressure acting on a first piston at one end of a slidable member connected to the brake, when the fluid pressure acting on a second piston at the other end of the member is reduced, the chamber of the first piston is directly connected to the pressure source and contains a third piston which carries a weight and is normally supported by the pressure fluid but which engages the slidable member to apply the brake if the fluid pressure fails. As shown, cylinders 8, 9 of pistons 6, 7 at the ends of a member 5 connected to a brake operating lever 2 are connected respectively to an oil pump 15 and to a control valve 21 which is also connected by pipe 19 to the pump. A pneumatic accumulator 27 provides a reserve of liquid under pressure. A piston 11 slidable in the cylinder 9 carries a weight 12 and is normally displaced from the piston 7 as shown by the fluid pressure a valve 16 being opened by the piston to byepass the pump when it reaches a predetermined height. A pressure relief valve of usual kind may replace the valve 16. The valve 21 is controlled by a manually operated floating lever 24 which is connected to the member 5 to give a follow-up action. Assuming the pistons to be in the raised position, downward movement of the lever 24 connects the cylinder 8 to the sump 17 through pipe 25 and a throttle valve 26, so that the member 5 descends under the pressure in cylinder 9 to apply the brake. When the lever 24 is raised the cylinder 8 is connected to the supply pipe 14 by the valve to release the brake. Should the oil pressure fail when the brake is off, the piston 11 moves downwards to abut on the member 5 so that upon subsequent operation of the valve 21 to vent the cylinder 8 the brake is applied by the weight 12. A hand or other pump may be arranged between the sump 17 and the lower end of the member 5 to enable the brake to be released when the main supply has failed. The pistons 6, 7 may be of equal areas, a reducing valve being arranged in the connection to the upper cylinder. The brake may be used for winding engines.
GB485246A 1946-02-15 1946-02-15 Improvements in braking mechanisms Expired GB627559A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB485246A GB627559A (en) 1946-02-15 1946-02-15 Improvements in braking mechanisms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB485246A GB627559A (en) 1946-02-15 1946-02-15 Improvements in braking mechanisms

Publications (1)

Publication Number Publication Date
GB627559A true GB627559A (en) 1949-08-11

Family

ID=9785016

Family Applications (1)

Application Number Title Priority Date Filing Date
GB485246A Expired GB627559A (en) 1946-02-15 1946-02-15 Improvements in braking mechanisms

Country Status (1)

Country Link
GB (1) GB627559A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1208860B (en) * 1963-09-28 1966-01-13 Siemens Ag Pressurized, single-axis travel and safety brake, especially for conveyor machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1208860B (en) * 1963-09-28 1966-01-13 Siemens Ag Pressurized, single-axis travel and safety brake, especially for conveyor machines

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