GB558348A - Improvements relating to electromagnetic switches - Google Patents

Improvements relating to electromagnetic switches

Info

Publication number
GB558348A
GB558348A GB1504942A GB1504942A GB558348A GB 558348 A GB558348 A GB 558348A GB 1504942 A GB1504942 A GB 1504942A GB 1504942 A GB1504942 A GB 1504942A GB 558348 A GB558348 A GB 558348A
Authority
GB
United Kingdom
Prior art keywords
armature
carrying
shaft
knock
magnet
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
GB1504942A
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.)
CONTACTOR SWITCHGEAR Ltd
Original Assignee
CONTACTOR SWITCHGEAR 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 CONTACTOR SWITCHGEAR Ltd filed Critical CONTACTOR SWITCHGEAR Ltd
Priority to GB1504942A priority Critical patent/GB558348A/en
Publication of GB558348A publication Critical patent/GB558348A/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
    • H01H3/001—Means for preventing or breaking contact-welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/225—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member the supporting member being pivotable

Abstract

558,348. Electromagnetic switches. CONTRACTOR SWITCHGEAR Ltd., and RAYNER, H. Oct. 27, 1942, No. 15049. [Class 38 (v)] An electromagnetic contactor is provided with knock-off means which impart a sudden turning force to the rocking shaft 8a carrying the movable contact should the contacts fail to separate on de-energizing the magnet. In the form shown in Fig. 5 the shaft carrying the armature 2 has jaws 17 which engage with lost motion a portion 16 on the contact carrying shaft 8a. In modifications an auxiliary electromagnet such as 1b, Fig. 14, is energized simultaneously with the de-energization of the main magnet 1a and the movement of the auxiliary armature 2b serves to knock open the main armature 2a and the contact-carrying shaft 6 which is fixed to it should this not open in the normal way under spring or gravity action. In another modification, Fig. 12 (not shown) a pneumatic or hydraulic plunger is operated simultaneously with the de-energization of the contactor magnet and strikes against the armature to knock it into the off position.
GB1504942A 1942-10-27 1942-10-27 Improvements relating to electromagnetic switches Expired GB558348A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1504942A GB558348A (en) 1942-10-27 1942-10-27 Improvements relating to electromagnetic switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1504942A GB558348A (en) 1942-10-27 1942-10-27 Improvements relating to electromagnetic switches

Publications (1)

Publication Number Publication Date
GB558348A true GB558348A (en) 1943-12-31

Family

ID=10052131

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1504942A Expired GB558348A (en) 1942-10-27 1942-10-27 Improvements relating to electromagnetic switches

Country Status (1)

Country Link
GB (1) GB558348A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008000200A1 (en) * 2006-06-30 2008-01-03 Siemens Aktiengesellschaft Method and device for secure operation of a switch unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008000200A1 (en) * 2006-06-30 2008-01-03 Siemens Aktiengesellschaft Method and device for secure operation of a switch unit

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