GB475164A - Improvements in slow motion operating gear particularly applicable to controllers for electric motors - Google Patents

Improvements in slow motion operating gear particularly applicable to controllers for electric motors

Info

Publication number
GB475164A
GB475164A GB1345836A GB1345836A GB475164A GB 475164 A GB475164 A GB 475164A GB 1345836 A GB1345836 A GB 1345836A GB 1345836 A GB1345836 A GB 1345836A GB 475164 A GB475164 A GB 475164A
Authority
GB
United Kingdom
Prior art keywords
pawl
spring
teeth
arm
engages
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
GB1345836A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1345836A priority Critical patent/GB475164A/en
Publication of GB475164A publication Critical patent/GB475164A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/04—Levers
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
    • G05G5/02—Means preventing undesired movements of a controlling member which can be moved in two or more separate steps or ways, e.g. restricting to a stepwise movement or to a particular sequence of movements
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G2700/00—Control mechanisms or elements therefor applying a mechanical movement
    • G05G2700/04—Control mechanisms limiting amplitude or adjusting datum position
    • G05G2700/06—Control mechanisms for holding members in a number of positions comprising a device to limit the control range
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G2700/00—Control mechanisms or elements therefor applying a mechanical movement
    • G05G2700/04—Control mechanisms limiting amplitude or adjusting datum position
    • G05G2700/08—Control mechanisms for locking members in one or more positions

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Mechanisms For Operating Contacts (AREA)

Abstract

475,164. Locking levers. MUDIE, A. B. May 12, 1936, No. 13458. [Class 80 (iii)] [Also in Group XXXVII] Slow-motion operating-gear, particularly for electric motor controllers, comprises an operating member 1 associated with a spring-pressed L-shaped pawl 5 having a part 15 which engages in succession the teeth 4 of a fixed rack whereby the pawl is rocked relatively to the member 1 to bring an abutment 16 on the pawl into a position in which it engages the next tooth 4 of the rack so as to act as a stop, the spring 11 operating, after each tooth has been passed to restore the pawl 5 to its original position and permit, continued movement of the member 1. The member 1, pivoted at 2, moves over a quadrant 3 provided with teeth 4 which are of ratchet form to permit a quick return movement of the member 1. The pawl 5, pivoted at 6 to the underside of the member 1, has an arm 9, and an.arm 10 at right-angles thereto, the spring 11 being attached to the arm 9 and adjustably anchored to a lug 13 on the underside of the member 1. A roller 15 on the pawl 5 engages the outer ends of the teeth 4 in succession to rock the pawl and cause the surface 16 of the arm 10 to engage the radial side of the next tooth 4 and act as a stop, until a slight backward movement allows the spring 11 to return the pawl. The spacing of the teeth, the proportions of the pawl, and the strength of the spring may be such that the motion of the member 1 is interrupted only if the operator attempts to move it too quickly.
GB1345836A 1936-05-12 1936-05-12 Improvements in slow motion operating gear particularly applicable to controllers for electric motors Expired GB475164A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1345836A GB475164A (en) 1936-05-12 1936-05-12 Improvements in slow motion operating gear particularly applicable to controllers for electric motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1345836A GB475164A (en) 1936-05-12 1936-05-12 Improvements in slow motion operating gear particularly applicable to controllers for electric motors

Publications (1)

Publication Number Publication Date
GB475164A true GB475164A (en) 1937-11-12

Family

ID=10023334

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1345836A Expired GB475164A (en) 1936-05-12 1936-05-12 Improvements in slow motion operating gear particularly applicable to controllers for electric motors

Country Status (1)

Country Link
GB (1) GB475164A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2664762A (en) * 1951-08-03 1954-01-05 Northrop Aircraft Inc Jet engine throttle control
US2793541A (en) * 1953-05-11 1957-05-28 M J Johnson Aircraft Engineeri Safety locked control handle with override

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2664762A (en) * 1951-08-03 1954-01-05 Northrop Aircraft Inc Jet engine throttle control
US2793541A (en) * 1953-05-11 1957-05-28 M J Johnson Aircraft Engineeri Safety locked control handle with override

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