GB222011A - Improvements in electric controlling-switches - Google Patents

Improvements in electric controlling-switches

Info

Publication number
GB222011A
GB222011A GB3249523A GB3249523A GB222011A GB 222011 A GB222011 A GB 222011A GB 3249523 A GB3249523 A GB 3249523A GB 3249523 A GB3249523 A GB 3249523A GB 222011 A GB222011 A GB 222011A
Authority
GB
United Kingdom
Prior art keywords
pawl
ratchet
voltage coil
return
controller
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
GB3249523A
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
Allmanna Svenska Elektriska 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 ASEA AB, Allmanna Svenska Elektriska AB filed Critical ASEA AB
Priority to GB3249523A priority Critical patent/GB222011A/en
Publication of GB222011A publication Critical patent/GB222011A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection

Landscapes

  • Control Of Direct Current Motors (AREA)

Abstract

222,011. Danielsson, D., and Allmõnna Svenska Elektriska - Aktiebolaget. Dec. 29, 1923. Controllers, actuating; controllers with no-volt release.-An electric controller 2 for starting a motor is operated in steps against a spring 10 through a ratchet and pawl 3 by means of a. handle 5. The first step from the off-position shown connects in circuit a no-voltage coil 8 which brings a non-return pawl 6 into engagement with the ratchet teeth. Subsequent oscillations of the handle, providing the no-voltage coil remains active advance the controller over any required number of steps. Failure of voltage takes both the non-return pawl and the operating pawl out of engagement with the ratchet and allows the. spring 10 to return the controller to its original position. An excessive current in the motor circuit acts through a relay 18 to cut out the no-voltage coil.
GB3249523A 1923-12-29 1923-12-29 Improvements in electric controlling-switches Expired GB222011A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3249523A GB222011A (en) 1923-12-29 1923-12-29 Improvements in electric controlling-switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3249523A GB222011A (en) 1923-12-29 1923-12-29 Improvements in electric controlling-switches

Publications (1)

Publication Number Publication Date
GB222011A true GB222011A (en) 1924-09-25

Family

ID=10339469

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3249523A Expired GB222011A (en) 1923-12-29 1923-12-29 Improvements in electric controlling-switches

Country Status (1)

Country Link
GB (1) GB222011A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2141587A (en) * 1983-06-13 1984-12-19 Technology Res Corp Resettable circuit closing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2141587A (en) * 1983-06-13 1984-12-19 Technology Res Corp Resettable circuit closing device

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