GB403618A - Improvements in electromotor-driven lift operating mechanism - Google Patents

Improvements in electromotor-driven lift operating mechanism

Info

Publication number
GB403618A
GB403618A GB889932A GB889932A GB403618A GB 403618 A GB403618 A GB 403618A GB 889932 A GB889932 A GB 889932A GB 889932 A GB889932 A GB 889932A GB 403618 A GB403618 A GB 403618A
Authority
GB
United Kingdom
Prior art keywords
winding
motor
brake
motor current
energized
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
GB889932A
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.)
GRAHAM BROTHERS AB
Original Assignee
GRAHAM BROTHERS AB
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 GRAHAM BROTHERS AB filed Critical GRAHAM BROTHERS AB
Priority to GB889932A priority Critical patent/GB403618A/en
Publication of GB403618A publication Critical patent/GB403618A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
    • B66B1/32—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on braking devices, e.g. acting on electrically controlled brakes

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Stopping Of Electric Motors (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

403,618. Maintaining defined speeds of motors. GRAHAM BROS. AKTIEBOLAG, 34, Norr Malarstrand, Stockholm. March 24, 1932, No. 8899. Void [Abridged as open to inspection under Sect. 91 of the Acts, Sept. 17, 1932]. [Class 38 (iii).] A D.C. motor 4, Fig. 1, driving a lift is maintained at a constant slow speed, when the lift is approaching a landing at which it is to stop, by a brake 6 operated electromagnetically in accordance with the motor current. During normal running the brake is released by energization of a winding 13, 14. For slow speed operation the winding 13, 14 is de-energized, a winding 9, 10 is energized to assist a spring 15 to apply the brake and contacts 17 are opened so as to energize a winding 11, 12 with the motor current, the winding 11, 12 opposing winding 9, 10 and thus reducing the braking force upon increase of motor current. In one modification a three phase A.C. motor is used and the braking effect is reduced by a winding 31, 32, Fig. 2, connected in series with phase I. The supply to the windings may be rectified to reduce noise. In another modification an auxiliary motor is used either to produce or to reduce the braking pressure.
GB889932A 1932-03-24 1932-03-24 Improvements in electromotor-driven lift operating mechanism Expired GB403618A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB889932A GB403618A (en) 1932-03-24 1932-03-24 Improvements in electromotor-driven lift operating mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB889932A GB403618A (en) 1932-03-24 1932-03-24 Improvements in electromotor-driven lift operating mechanism

Publications (1)

Publication Number Publication Date
GB403618A true GB403618A (en) 1933-12-28

Family

ID=9861436

Family Applications (1)

Application Number Title Priority Date Filing Date
GB889932A Expired GB403618A (en) 1932-03-24 1932-03-24 Improvements in electromotor-driven lift operating mechanism

Country Status (1)

Country Link
GB (1) GB403618A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969180C (en) * 1948-10-09 1958-05-08 Elektro Mechanik G M B H Device for controlled braking of asynchronous motors, in particular for hoist and chassis drives
DE971900C (en) * 1949-08-17 1959-04-09 Siemens Ag Device for speed control of sub-synchronous drives, especially in crane systems
DE1178565B (en) * 1960-12-16 1964-09-24 Inventio Ag Device for controlling the braking process of elevators

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969180C (en) * 1948-10-09 1958-05-08 Elektro Mechanik G M B H Device for controlled braking of asynchronous motors, in particular for hoist and chassis drives
DE971900C (en) * 1949-08-17 1959-04-09 Siemens Ag Device for speed control of sub-synchronous drives, especially in crane systems
DE1178565B (en) * 1960-12-16 1964-09-24 Inventio Ag Device for controlling the braking process of elevators

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