GB1412134A - Lifts associated with stairs - Google Patents

Lifts associated with stairs

Info

Publication number
GB1412134A
GB1412134A GB4810772A GB4810772A GB1412134A GB 1412134 A GB1412134 A GB 1412134A GB 4810772 A GB4810772 A GB 4810772A GB 4810772 A GB4810772 A GB 4810772A GB 1412134 A GB1412134 A GB 1412134A
Authority
GB
United Kingdom
Prior art keywords
lift
signals
motor
detector
track
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
GB4810772A
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.)
PROJECT DESIGN CO REDCAR Ltd
Original Assignee
PROJECT DESIGN CO REDCAR 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 PROJECT DESIGN CO REDCAR Ltd filed Critical PROJECT DESIGN CO REDCAR Ltd
Priority to GB4810772A priority Critical patent/GB1412134A/en
Publication of GB1412134A publication Critical patent/GB1412134A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
    • B66B9/06—Kinds or types of lifts in, or associated with, buildings or other structures inclined, e.g. serving blast furnaces
    • B66B9/08—Kinds or types of lifts in, or associated with, buildings or other structures inclined, e.g. serving blast furnaces associated with stairways, e.g. for transporting disabled persons

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Automation & Control Theory (AREA)
  • Structural Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

1412134 Controlling lifts PROJECT & DESIGN CO (REDCAR) Ltd 14 Jan 1974 [19 Oct 1972] 48107/72 Heading B8L A system for controlling the starting and stopping of a lift movable along a track associated with stairs, wherein oscillating electromagnetic flux signals emitted from an emitter coil on the lift, are received by a detector extending along the track, and are amplified to control the lift motor. The detector is terminated adjacent the ends of the track causing automatic cut off of signal, and hence motor, at the track limits. The control signals for up and down movements of the lift are isolated from each other, either by having two spaced emitter and detector arrangements, or by having one detector with two emitters of different frequency or polarity signals, or by having one emitter capable of emitting signals of different frequency or polarity, in conjunction with two detectors. The emitting of signals is controlled by a manually operated switch or switches on the lift, the signals ceasing as the switch or switches are released. Upon termination of the signals, a D.C. injection braking system is automatically operated within the electric lift motor. The lift is raised and lowered by a cable wound on a drum driven by the motor through a worm reduction gear-box, which worm acts as a brake once the motor has been stopped.
GB4810772A 1972-10-19 1972-10-19 Lifts associated with stairs Expired GB1412134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4810772A GB1412134A (en) 1972-10-19 1972-10-19 Lifts associated with stairs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4810772A GB1412134A (en) 1972-10-19 1972-10-19 Lifts associated with stairs

Publications (1)

Publication Number Publication Date
GB1412134A true GB1412134A (en) 1975-10-29

Family

ID=10447419

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4810772A Expired GB1412134A (en) 1972-10-19 1972-10-19 Lifts associated with stairs

Country Status (1)

Country Link
GB (1) GB1412134A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140299391A1 (en) * 2011-08-15 2014-10-09 Ferno-Washington, Inc. Patient transport devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140299391A1 (en) * 2011-08-15 2014-10-09 Ferno-Washington, Inc. Patient transport devices

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee
PCNP Patent ceased through non-payment of renewal fee