GB160302A - Improvements in or relating to alternating current electric control mechanism for cranes or other hoisting gear - Google Patents

Improvements in or relating to alternating current electric control mechanism for cranes or other hoisting gear

Info

Publication number
GB160302A
GB160302A GB3273219A GB3273219A GB160302A GB 160302 A GB160302 A GB 160302A GB 3273219 A GB3273219 A GB 3273219A GB 3273219 A GB3273219 A GB 3273219A GB 160302 A GB160302 A GB 160302A
Authority
GB
United Kingdom
Prior art keywords
hoisting gear
motor
cranes
relating
alternating current
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
GB3273219A
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.)
Herbert Morris Ltd
Original Assignee
Herbert Morris 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 Herbert Morris Ltd filed Critical Herbert Morris Ltd
Priority to GB3273219A priority Critical patent/GB160302A/en
Publication of GB160302A publication Critical patent/GB160302A/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
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/22—Control systems or devices for electric drives
    • B66C13/23—Circuits for controlling the lowering of the load
    • B66C13/26—Circuits for controlling the lowering of the load by ac motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/08—Electrical assemblies or electrical control devices for cranes, winches, capstans or electrical hoists
    • B66C2700/081—Electrical assemblies or electrical control devices for cranes, winches, capstans or electrical hoists with ac motors

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

160,302. Morris, Ltd., H., and Weston, W. N. Dec. 31, 1919. Electric plant.-Slow hook-motions of crane or other hoisting gear operated by an alternating- current motor are obtained, when desired, 'by means of a centrifugal brake brought into operation by a solenoid. The motor F drives the hoisting gear J and also one member 0 of a friction clutch, the other member K being geared to a centrifugal brake N. Normally, when the load tends to drive the motor as in lowering, the motor accelerates to its synchronous speed. When a slower lowering speed is required the clutch, K, 0 is closed by a solenoid P and the centrifugal brake comes into action to slow down the motor.
GB3273219A 1919-12-31 1919-12-31 Improvements in or relating to alternating current electric control mechanism for cranes or other hoisting gear Expired GB160302A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3273219A GB160302A (en) 1919-12-31 1919-12-31 Improvements in or relating to alternating current electric control mechanism for cranes or other hoisting gear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3273219A GB160302A (en) 1919-12-31 1919-12-31 Improvements in or relating to alternating current electric control mechanism for cranes or other hoisting gear

Publications (1)

Publication Number Publication Date
GB160302A true GB160302A (en) 1921-03-24

Family

ID=10343180

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3273219A Expired GB160302A (en) 1919-12-31 1919-12-31 Improvements in or relating to alternating current electric control mechanism for cranes or other hoisting gear

Country Status (1)

Country Link
GB (1) GB160302A (en)

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