GB721753A - Improvements relating to electromagnetically-operated step-by-step mechanisms - Google Patents

Improvements relating to electromagnetically-operated step-by-step mechanisms

Info

Publication number
GB721753A
GB721753A GB2323351A GB2323351A GB721753A GB 721753 A GB721753 A GB 721753A GB 2323351 A GB2323351 A GB 2323351A GB 2323351 A GB2323351 A GB 2323351A GB 721753 A GB721753 A GB 721753A
Authority
GB
United Kingdom
Prior art keywords
pawl
ratchet
wheel
stopping
driving
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
GB2323351A
Inventor
Horace Edgar Humphries
John Douglas Leslie
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.)
Siemens Brothers and Co Ltd
Original Assignee
Siemens Brothers and Co 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 Siemens Brothers and Co Ltd filed Critical Siemens Brothers and Co Ltd
Priority to GB2323351A priority Critical patent/GB721753A/en
Publication of GB721753A publication Critical patent/GB721753A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H63/00—Details of electrically-operated selector switches
    • H01H63/16—Driving arrangements for multi-position wipers
    • H01H63/18—Driving arrangements for multi-position wipers with step-by-step motion of wiper to a selector position
    • H01H63/20—Driving arrangements for multi-position wipers with step-by-step motion of wiper to a selector position using stepping magnet and ratchet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
    • H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
    • H01H51/08—Contacts alternately opened and closed by successive cycles of energisation and de-energisation of the electromagnet, e.g. by use of a ratchet
    • H01H51/082—Contacts alternately opened and closed by successive cycles of energisation and de-energisation of the electromagnet, e.g. by use of a ratchet using rotating ratchet mechanism

Abstract

721,753. Ratchet gearing. SIEMENS BROS., & CO., Ltd. Sept. 26, 1952 [Oct. 5, 1951], No. 23233/51. Class 80 (3). In an electromagnetically actuated ratchet gear the armature 12 pivoted at 13 has an extension 14 carrying in addition to a driving pawl 15 a stopping pawl 16 engaging the teeth of the ratchet wheel 5 to prevent over-running of the wheel. The stopping pawl is of substantially U-shape and engages the longer flanks of the ratchet teeth by an outer side face in a trailing manner. A retaining pawl 22 also engages the wheel to prevent reverse rotation. Both the driving and stopping pawl may be of spring strip material, the stopping pawl preferably being thicker or backed by a reinforcing member. Alternatively the driving pawl may be pivoted and subjected to spring pressure and may carry the stopping pawl as an extension of rigid or spring form.
GB2323351A 1951-10-05 1951-10-05 Improvements relating to electromagnetically-operated step-by-step mechanisms Expired GB721753A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2323351A GB721753A (en) 1951-10-05 1951-10-05 Improvements relating to electromagnetically-operated step-by-step mechanisms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2323351A GB721753A (en) 1951-10-05 1951-10-05 Improvements relating to electromagnetically-operated step-by-step mechanisms

Publications (1)

Publication Number Publication Date
GB721753A true GB721753A (en) 1955-01-12

Family

ID=10192323

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2323351A Expired GB721753A (en) 1951-10-05 1951-10-05 Improvements relating to electromagnetically-operated step-by-step mechanisms

Country Status (1)

Country Link
GB (1) GB721753A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926547A (en) * 1957-06-04 1960-03-01 Bendix Aviat Corp Pawl and ratchet mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926547A (en) * 1957-06-04 1960-03-01 Bendix Aviat Corp Pawl and ratchet mechanism

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