GB531235A - Improvements in and relating to electrical contacts - Google Patents

Improvements in and relating to electrical contacts

Info

Publication number
GB531235A
GB531235A GB2060439A GB2060439A GB531235A GB 531235 A GB531235 A GB 531235A GB 2060439 A GB2060439 A GB 2060439A GB 2060439 A GB2060439 A GB 2060439A GB 531235 A GB531235 A GB 531235A
Authority
GB
United Kingdom
Prior art keywords
boron
hydrogen
per cent
tungsten
mallory
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
GB2060439A
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.)
Duracell Inc USA
Original Assignee
PR Mallory and Co Inc
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 PR Mallory and Co Inc filed Critical PR Mallory and Co Inc
Priority to GB2060439A priority Critical patent/GB531235A/en
Publication of GB531235A publication Critical patent/GB531235A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material

Abstract

531,235. Alloys; cementation. MALLORY METALLURGICAL PRODUCTS, Ltd. (Mallory & Co., Inc., P. R.). July 15, 1939, No. 20604. [Classes 72 and 82 (i)] [Also in Group III] Electric contacts, particularly for ignition systems are made of tungsten containing up to 1 per cent. of boron. Tungsten with a boron content of for example 0.5 per cent. may be made from a mixture of the powders by ball milling, pressing, heating, and swaging into rods from which the contact discs are cut; or tungsten contacts may be heated to 1200-1500‹C. in an atmosphere of a mixure of hydrogen and boron hydride made by heating magnesium powder with boron oxide in hydrogen and decomposing the resulting magnesium boride with hydrochloric acid diluted with hydrogen at 50‹C. Small quantities of other elements such as 1 per cent. of molybdenum may also be present.
GB2060439A 1939-07-15 1939-07-15 Improvements in and relating to electrical contacts Expired GB531235A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2060439A GB531235A (en) 1939-07-15 1939-07-15 Improvements in and relating to electrical contacts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2060439A GB531235A (en) 1939-07-15 1939-07-15 Improvements in and relating to electrical contacts

Publications (1)

Publication Number Publication Date
GB531235A true GB531235A (en) 1940-12-31

Family

ID=10148679

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2060439A Expired GB531235A (en) 1939-07-15 1939-07-15 Improvements in and relating to electrical contacts

Country Status (1)

Country Link
GB (1) GB531235A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983000945A1 (en) * 1981-09-11 1983-03-17 Western Electric Co Apparatus including electrical contacts

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983000945A1 (en) * 1981-09-11 1983-03-17 Western Electric Co Apparatus including electrical contacts
EP0074630A2 (en) * 1981-09-11 1983-03-23 Western Electric Company, Incorporated Apparatus including electrical contacts
EP0074630A3 (en) * 1981-09-11 1985-05-22 Western Electric Company, Incorporated Apparatus including electrical contacts

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