GB188448A - Improvements in or relating to electrically-driven lifting gear - Google Patents

Improvements in or relating to electrically-driven lifting gear

Info

Publication number
GB188448A
GB188448A GB2435221A GB2435221A GB188448A GB 188448 A GB188448 A GB 188448A GB 2435221 A GB2435221 A GB 2435221A GB 2435221 A GB2435221 A GB 2435221A GB 188448 A GB188448 A GB 188448A
Authority
GB
United Kingdom
Prior art keywords
motor
band
brake
load
drum
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
GB2435221A
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.)
Siemens Schuckertwerke AG
Original Assignee
Siemens Schuckertwerke AG
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 Siemens Schuckertwerke AG filed Critical Siemens Schuckertwerke AG
Priority to GB2435221A priority Critical patent/GB188448A/en
Publication of GB188448A publication Critical patent/GB188448A/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
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/02—Driving gear
    • B66D1/12—Driving gear incorporating electric motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/01—Winches, capstans or pivots
    • B66D2700/0125—Motor operated winches
    • B66D2700/0141—Electrically actuated

Abstract

188,448. Marks, E. C. R., (Siemens- Schuckertwerke Ges.). Sept. 13, 1921. Alternating-current motors; motors, gearing for.-Comprises the use of epicyclic gearing between an alternating-current induction motor and the load, with the object of allowing the motor to function as a braking generator when the load drives the motor at more than its synchronous speed during gravity lowering. Motors of this type are controlled usually by inserting starting resistances in the circuit of the induced portion, which arrangement prevents the motor functioning satisfactorily as a brake in the manner stated above. In the present construction the resistances are omitted, and the motor is controlled at starting by the gradual release of a brake band 8, Fig. 2, on the winding drum and the gradual application of a brake 11 to the ring 10 of the transmission gear to produce a regulatable amount of slip of the ring. When the drum is freed from the band 8 and the ring is fixed by the band 11, the motor rotates at full lowering speed, and is free to function as a brake when the load overruns and drives it at more than this speed. Fig. 3 shows a modified arrangement of gear which permits the motor to run continuously in the same direction. When the brake bands 8, 14 are loose and the band 11 is tightened, the drum 6 revolves in the same direction as the central driving-shaft, but when the band 14 is tightened and the bands 8, 11 are loose, the planet gear rotates around the pinion 15 and the drum and driving-shaft revolve in opposite directions. Centrifugal masses may be arranged in parallel with the motor and utilised in a known manner to absorb surplus energy when the motor is running under light load, and give up energy when the motor is overloaded, thus preventing the load variations from reacting on the supply circuit.
GB2435221A 1921-09-13 1921-09-13 Improvements in or relating to electrically-driven lifting gear Expired GB188448A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2435221A GB188448A (en) 1921-09-13 1921-09-13 Improvements in or relating to electrically-driven lifting gear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2435221A GB188448A (en) 1921-09-13 1921-09-13 Improvements in or relating to electrically-driven lifting gear

Publications (1)

Publication Number Publication Date
GB188448A true GB188448A (en) 1922-11-16

Family

ID=10210356

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2435221A Expired GB188448A (en) 1921-09-13 1921-09-13 Improvements in or relating to electrically-driven lifting gear

Country Status (1)

Country Link
GB (1) GB188448A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1120092B (en) * 1957-05-17 1961-12-21 Und Eisengiesserei Dessau Veb Electric pulley block with a single or multi-stage planetary gear
FR2971242A1 (en) * 2011-02-08 2012-08-10 Batiment Service Ind Winch for fixing on mast of crane jib for handling e.g. equipment, at building site, has drum around which cable is wound, where drum is rotated by asynchronous electric motor supplied with alternating current

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1120092B (en) * 1957-05-17 1961-12-21 Und Eisengiesserei Dessau Veb Electric pulley block with a single or multi-stage planetary gear
FR2971242A1 (en) * 2011-02-08 2012-08-10 Batiment Service Ind Winch for fixing on mast of crane jib for handling e.g. equipment, at building site, has drum around which cable is wound, where drum is rotated by asynchronous electric motor supplied with alternating current

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