GB2020487A - A reed contact unit - Google Patents

A reed contact unit

Info

Publication number
GB2020487A
GB2020487A GB7918909A GB7918909A GB2020487A GB 2020487 A GB2020487 A GB 2020487A GB 7918909 A GB7918909 A GB 7918909A GB 7918909 A GB7918909 A GB 7918909A GB 2020487 A GB2020487 A GB 2020487A
Authority
GB
United Kingdom
Prior art keywords
magnetic
contact
contacts
contact unit
increase
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.)
Granted
Application number
GB7918909A
Other versions
GB2020487B (en
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.)
STANDEX ELECTRONICS Ltd
Original Assignee
STANDEX ELECTRONICS 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 STANDEX ELECTRONICS Ltd filed Critical STANDEX ELECTRONICS Ltd
Priority to GB7918909A priority Critical patent/GB2020487B/en
Publication of GB2020487A publication Critical patent/GB2020487A/en
Application granted granted Critical
Publication of GB2020487B publication Critical patent/GB2020487B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/64—Protective enclosures, baffle plates, or screens for contacts
    • H01H1/66—Contacts sealed in an evacuated or gas-filled envelope, e.g. magnetic dry-reed contacts

Landscapes

  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)

Abstract

A magnetically actuatable reed contact unit has two electrodes extending into an hermetically sealed enclosure to overlap at a contact region and at least one of the electrodes is provided with an enlarged end portion so as to increase magnetic mass at the contact region and thereby increase contact forces during actuation and in the closed position of the contacts. In this way the magnetic circuit of the contact unit can be constructed independently of the mechanical deflection system thus allowing the use of special magnetic materials for the contact element which do not have to have the required physical characteristics for glass to metal sealing. The elements of the contacts can be selected to fulfil a particular function of the switch such as magnetic holding when a hard magnetic material is used, high sensitivity when a highly permeable magnetic material is used, a soft iron for low remanence and a permanent magnet for normally closed contacts. <IMAGE>
GB7918909A 1978-03-14 1979-05-31 Reed contact unit Expired GB2020487B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7918909A GB2020487B (en) 1978-03-14 1979-05-31 Reed contact unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1005978 1978-03-14
GB7918909A GB2020487B (en) 1978-03-14 1979-05-31 Reed contact unit

Publications (2)

Publication Number Publication Date
GB2020487A true GB2020487A (en) 1979-11-14
GB2020487B GB2020487B (en) 1982-11-03

Family

ID=26247216

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7918909A Expired GB2020487B (en) 1978-03-14 1979-05-31 Reed contact unit

Country Status (1)

Country Link
GB (1) GB2020487B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2342779A (en) * 1998-08-14 2000-04-19 Jacek Spoczynski Sealed magnetic switch
GB2436639A (en) * 2006-03-29 2007-10-03 Rupert Stephen Fane De Salis Electrical switch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2342779A (en) * 1998-08-14 2000-04-19 Jacek Spoczynski Sealed magnetic switch
GB2436639A (en) * 2006-03-29 2007-10-03 Rupert Stephen Fane De Salis Electrical switch

Also Published As

Publication number Publication date
GB2020487B (en) 1982-11-03

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Legal Events

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

Effective date: 19920531