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GB1458115A - Pulley blocks - Google Patents

Pulley blocks

Info

Publication number
GB1458115A
GB1458115A GB1806174A GB1806174A GB1458115A GB 1458115 A GB1458115 A GB 1458115A GB 1806174 A GB1806174 A GB 1806174A GB 1806174 A GB1806174 A GB 1806174A GB 1458115 A GB1458115 A GB 1458115A
Authority
GB
United Kingdom
Prior art keywords
ropes
pulleys
frame
pair
tensions
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
GB1806174A
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.)
OD POLT INSTITUT
Odessky Politekhnichesky Institut
Original Assignee
OD POLT INSTITUT
Odessky Politekhnichesky Institut
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 OD POLT INSTITUT, Odessky Politekhnichesky Institut filed Critical OD POLT INSTITUT
Priority to GB1806174A priority Critical patent/GB1458115A/en
Publication of GB1458115A publication Critical patent/GB1458115A/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
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/54—Safety gear

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

1458115 Equalizing tension in ropes ODES POLITEKHNICHE INST 25 April 1974 18061/74 Heading B8B A pulley block which is mounted on a jib crane comprises a pair of ropes 4, 5 attached to respective winch drums 11, 12, the ropes 4, 5 passing about respective pulleys 1 which carry a load-supporting hoisting member 2, and are attached at their ends to the crane structure 9, the pulley block further comprising means for equalizing the tensions in the ropes 4, 5, said means comprising a pair of pulleys 6 about which the ropes respectively pass, the pulleys 6 being mounted on a frame 7 movable in guides 8 fixed on the crane structure 9, buffer stops in the form of springs 10 being provided with a clearance # between the ends of the frame 7 and the ends of the guides 8. Under normal conditions a load is lifted or lowered by the drums 11, 12 which wind or unwind the ropes 4, 5, the tensions of the ropes 4, 5 being equalized by the translatory motion of the frame 7 and pulleys 6 within the clearances #. Should one of the ropes, e.g. rope 4, snap the pair of pulleys 1 and hoisting member 2 begin to fall, causing the frame 7 to move leftwards in Fig. 1 thereby contracting the relevant spring 10 which is compressed to thereby smoothly decelerate the movement of the frame 7 until the latter is stationary. The ropes 4, 5 also pass about a respective fixed pulley 13, 14 mounted on the crane structure 9. In the embodiment of Fig. 2 (not shown) the tension equalizing means comprises a pair of rollers (24) about which ropes (20, 21) are respectively entrained, the rollers (24) being rigidly interconnected so that their surfaces define a cylinder (25) which is threadedly mounted on a screw (22) which acts as a guide, buffer stops (26) which each consist of a fixed and movable plate (27, 28) with a spring (29) therebetween being provided towards the end of the screw (22) at a respective clearance (#) from the cylinder (25), and as the tensions of the ropes (20, 21) are being equalized the cylinder (25) moves along the screw (22) within the clearances (#). In this particular embodiment the pulley block is mounted on an overhead crane, but both the pulley blocks described may be used with hoisting devices other than cranes.
GB1806174A 1974-04-25 1974-04-25 Pulley blocks Expired GB1458115A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1806174A GB1458115A (en) 1974-04-25 1974-04-25 Pulley blocks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1806174A GB1458115A (en) 1974-04-25 1974-04-25 Pulley blocks

Publications (1)

Publication Number Publication Date
GB1458115A true GB1458115A (en) 1976-12-08

Family

ID=10105972

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1806174A Expired GB1458115A (en) 1974-04-25 1974-04-25 Pulley blocks

Country Status (1)

Country Link
GB (1) GB1458115A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462381A1 (en) * 1979-07-30 1981-02-13 Falcy Bernard Automatic multi-cable system tension balancing device - has wires passing over series of parallel fixed and floating rollers mounted in housing
DE3129882A1 (en) * 1981-07-29 1983-02-17 Stohrer-Doduco GmbH & Co, 7250 Leonberg Lifting device for surface practice
EP0088168A3 (en) * 1982-03-08 1984-07-18 Ateliers De Constructions Electriques De Charleroi (Acec) Societe Anonyme Safety device for the load-engaging mechanism of nuclear combustion elements
CN1101332C (en) * 1999-05-19 2003-02-12 马金祥 Antique suspended coffin hoisting method
CN106006208A (en) * 2016-07-18 2016-10-12 吴江福爱梁纺织有限公司 Yarn combining dynamic balance device
CN106006202A (en) * 2016-07-18 2016-10-12 吴江福爱梁纺织有限公司 Balanced yarn doubling system
CN115072608A (en) * 2022-05-23 2022-09-20 杭州华新机电工程有限公司 Platform lifting mechanism
WO2023011537A1 (en) * 2021-08-06 2023-02-09 广东博智林机器人有限公司 Suspension system and suspension emergency release method
CN116105455A (en) * 2023-03-06 2023-05-12 合肥华凌股份有限公司 Lifting components, storage devices and mobile refrigerators
CN116222124A (en) * 2023-03-06 2023-06-06 合肥华凌股份有限公司 Lifting assembly, storage device and mobile refrigerator
CN116336742A (en) * 2023-03-06 2023-06-27 合肥华凌股份有限公司 Lifting assembly, storage device and mobile refrigerator

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462381A1 (en) * 1979-07-30 1981-02-13 Falcy Bernard Automatic multi-cable system tension balancing device - has wires passing over series of parallel fixed and floating rollers mounted in housing
DE3129882A1 (en) * 1981-07-29 1983-02-17 Stohrer-Doduco GmbH & Co, 7250 Leonberg Lifting device for surface practice
EP0088168A3 (en) * 1982-03-08 1984-07-18 Ateliers De Constructions Electriques De Charleroi (Acec) Societe Anonyme Safety device for the load-engaging mechanism of nuclear combustion elements
CN1101332C (en) * 1999-05-19 2003-02-12 马金祥 Antique suspended coffin hoisting method
CN106006208A (en) * 2016-07-18 2016-10-12 吴江福爱梁纺织有限公司 Yarn combining dynamic balance device
CN106006202A (en) * 2016-07-18 2016-10-12 吴江福爱梁纺织有限公司 Balanced yarn doubling system
WO2023011537A1 (en) * 2021-08-06 2023-02-09 广东博智林机器人有限公司 Suspension system and suspension emergency release method
CN115072608A (en) * 2022-05-23 2022-09-20 杭州华新机电工程有限公司 Platform lifting mechanism
CN116105455A (en) * 2023-03-06 2023-05-12 合肥华凌股份有限公司 Lifting components, storage devices and mobile refrigerators
CN116222124A (en) * 2023-03-06 2023-06-06 合肥华凌股份有限公司 Lifting assembly, storage device and mobile refrigerator
CN116336742A (en) * 2023-03-06 2023-06-27 合肥华凌股份有限公司 Lifting assembly, storage device and mobile refrigerator

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee