GB1283245A - Improvements in control circuits for electric hoist blocks - Google Patents

Improvements in control circuits for electric hoist blocks

Info

Publication number
GB1283245A
GB1283245A GB5145969A GB5145969A GB1283245A GB 1283245 A GB1283245 A GB 1283245A GB 5145969 A GB5145969 A GB 5145969A GB 5145969 A GB5145969 A GB 5145969A GB 1283245 A GB1283245 A GB 1283245A
Authority
GB
United Kingdom
Prior art keywords
brake
energize
control circuits
electric hoist
motor
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
GB5145969A
Inventor
Stanley Jack Phipps
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 GB5145969A priority Critical patent/GB1283245A/en
Publication of GB1283245A publication Critical patent/GB1283245A/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
    • B66C15/00—Safety gear
    • 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
    • B66C2700/084—Protection measures

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control And Safety Of Cranes (AREA)
  • Control Of Multiple Motors (AREA)

Abstract

1283245 Control of A.C. motors HERBERT MORRIS Ltd 15 Oct 1970 [21 Oct 1969] 51459/69 Heading H2J A hoist block is driven by a motor M associated with a brake B which is applied when its coil is de-energized. During hoisting operation, relays m and D operate to energize the brake and the motor simultaneously over contacts B<SP>1</SP> and c<SP>1</SP>. When the load is to be lowered, relay D is initially energized to release the brake and contacts d close after a time delay to energize relay m<SP>1</SP> and energize the motor over contacts c<SP>2</SP>.
GB5145969A 1969-10-21 1969-10-21 Improvements in control circuits for electric hoist blocks Expired GB1283245A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5145969A GB1283245A (en) 1969-10-21 1969-10-21 Improvements in control circuits for electric hoist blocks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5145969A GB1283245A (en) 1969-10-21 1969-10-21 Improvements in control circuits for electric hoist blocks

Publications (1)

Publication Number Publication Date
GB1283245A true GB1283245A (en) 1972-07-26

Family

ID=10460112

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5145969A Expired GB1283245A (en) 1969-10-21 1969-10-21 Improvements in control circuits for electric hoist blocks

Country Status (1)

Country Link
GB (1) GB1283245A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108545618A (en) * 2018-06-30 2018-09-18 福州宝井钢材有限公司 A kind of linkage of crane three sound-light alarm control device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108545618A (en) * 2018-06-30 2018-09-18 福州宝井钢材有限公司 A kind of linkage of crane three sound-light alarm control device

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees