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

Similar Documents

Publication Publication Date Title
GB403618A (en) Improvements in electromotor-driven lift operating mechanism
US2052201A (en) Combined electric and pneumatic brake apparatus
GB423235A (en) Improvements in braking mechanism for lifts
GB764788A (en) Electrical anti-skid mechanism for brakes
US2012747A (en) Vehicle braking system
GB1190880A (en) Improvements in Electromagnetic Brakes
US2130621A (en) Magnetic brake control
GB461755A (en) Improvements in or relating to regenerative control systems for electric traction motors
GB220145A (en) Improvements in or relating to braking systems for motor driven machinery operating on alternating current
US2081459A (en) Magnetic shoe brake
GB382661A (en) Improvements in or relating to the control of electric motors
GB494900A (en) Improvements in and relating to electric control for electric motors, steam engines and other prime movers
GB462235A (en) Improvements in control systems for electric traction motors
GB278754A (en) Improvements in electric motor control systems
GB506733A (en) Variable speed control of brake pressure
US2038185A (en) Compressor governor
US2173944A (en) Traction increasing device
GB251503A (en) Control of polyphase crane-driving or like motors
GB519697A (en) Improvements in or relating to electric motor control systems
GB420490A (en) Improvements in safety devices for moving stairways
GB486556A (en) Improvements in or relating to the braking and/or mooring of aircraft
GB399483A (en) Improvements relating to electric motor control gear
GB444662A (en) An improvement in or relating to alternating-current electric drives
GB495897A (en) Improvements in or relating to brake operating mechanisms
GB254383A (en) Improvements in the control of prime movers