GB711693A - Improvements relating to winding mechanism for grab cranes - Google Patents

Improvements relating to winding mechanism for grab cranes

Info

Publication number
GB711693A
GB711693A GB598450A GB598450A GB711693A GB 711693 A GB711693 A GB 711693A GB 598450 A GB598450 A GB 598450A GB 598450 A GB598450 A GB 598450A GB 711693 A GB711693 A GB 711693A
Authority
GB
United Kingdom
Prior art keywords
drums
arm
shaft
spider
clutch
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
GB598450A
Inventor
Arthur Ernest Franklin
Fred Vernon Ingram
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.)
Priestman Brothers Ltd
Original Assignee
Priestman Brothers Ltd
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 Priestman Brothers Ltd filed Critical Priestman Brothers Ltd
Priority to GB598450A priority Critical patent/GB711693A/en
Publication of GB711693A publication Critical patent/GB711693A/en
Priority to MY5500010A priority patent/MY5500010A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
    • B66C3/12—Grabs actuated by two or more ropes
    • B66C3/125—Devices for control

Landscapes

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

Abstract

711,693. Winch clutches. PRIESTMAN BROS. Ltd. Feb. 15, 1951 [March 9, 1950], No. 5984/50. Class 78 (5) A grab crane is provided with two winding drums 1, 5 of equal diameter intended respectively for the closing and hoisting and for the opening and holding ropes and being mounted in line so that they may rotate independently of each other about the same axis, and a clutch 15 to connect the winding drums directly together so that they may be rotated together at the same speed about the said axis. Twin drums 1 (Fig. 1), freely mounted on shaft 3 are driven from motor 7 though chain 8, pinion 9 and spur wheel 10 secured to drums 1. Drums 5 and 6 secured to shaft 3 are driven from motor 11 through chain 12, pinion 13 and spur wheel 14 fixed to drum 5. Drums 1 and 5 may be interconnected through clutch 15. To shaft 3 (Fig. 2) is keyed spider 21 which carries clutch band 16 embracing extension 18 of drum 1, one end of said clutch band being pivoted at 20 to said spider and the other end of said clutch band being adjustably secured at 23 to arm 24, and said arm 24 being pivoted at 25 to the spider and being rigidly connected to arm 26 which is resiliently biassed at 27 and forms the means of operating the clutch band Arm 26, in turn, is operated by a foot pedal or solenoid 46 through crank arm 45, shaft 44. arm 43 and brake band 40, the latter being fixed at 41 and passing round brake drum 39, and the latter drum being freely rotatable on shaft 3 and carrying opposite lugs 36, 37 which operate said arm 26 through pin-and-slot means. Thus solenoid or pedal 46 causes brake band 40 to slow down brake drum 39 rotating with spider 21 at the speed of shaft 3. This relative rotation between brake drum and spider causes movement of lugs 36, 37 to swing arm 26 clockwise about 25 so that the clutch band. 16, usually slack, is tightened and drums 1 are clutched to shaft 3 and therefore to drums 5 and 6. In this way all four drums .are driven from either motor. Spider 21 is formed with adjustable pads which locate the clutch band. Specifications 264,327, [Class 80 (ii)], and 536,952 are referred to.
GB598450A 1950-03-09 1950-03-09 Improvements relating to winding mechanism for grab cranes Expired GB711693A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB598450A GB711693A (en) 1950-03-09 1950-03-09 Improvements relating to winding mechanism for grab cranes
MY5500010A MY5500010A (en) 1950-03-09 1955-12-30 Improvements relating to winding mechanism for grab cranes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB598450A GB711693A (en) 1950-03-09 1950-03-09 Improvements relating to winding mechanism for grab cranes

Publications (1)

Publication Number Publication Date
GB711693A true GB711693A (en) 1954-07-07

Family

ID=9806282

Family Applications (1)

Application Number Title Priority Date Filing Date
GB598450A Expired GB711693A (en) 1950-03-09 1950-03-09 Improvements relating to winding mechanism for grab cranes

Country Status (2)

Country Link
GB (1) GB711693A (en)
MY (1) MY5500010A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4838438A (en) * 1983-08-08 1989-06-13 Hitachi, Ltd. Crane and driving system therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4838438A (en) * 1983-08-08 1989-06-13 Hitachi, Ltd. Crane and driving system therefor

Also Published As

Publication number Publication date
MY5500010A (en) 1955-12-31

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