GB244825A - Improvements in electrical fuses - Google Patents

Improvements in electrical fuses

Info

Publication number
GB244825A
GB244825A GB2244024A GB2244024A GB244825A GB 244825 A GB244825 A GB 244825A GB 2244024 A GB2244024 A GB 2244024A GB 2244024 A GB2244024 A GB 2244024A GB 244825 A GB244825 A GB 244825A
Authority
GB
United Kingdom
Prior art keywords
copper
mixture
finely divided
added
vapour
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
GB2244024A
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.)
HENRY PHILIP LAWTON HIGMAN
Original Assignee
HENRY PHILIP LAWTON HIGMAN
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 HENRY PHILIP LAWTON HIGMAN filed Critical HENRY PHILIP LAWTON HIGMAN
Priority to GB2244024A priority Critical patent/GB244825A/en
Publication of GB244825A publication Critical patent/GB244825A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/38—Means for extinguishing or suppressing arc
    • H01H85/42—Means for extinguishing or suppressing arc using an arc-extinguishing gas

Landscapes

  • Fuses (AREA)

Abstract

244,825. Higman, H. P. L. Sept 23, 1924. Fusible cut-outs.-To extinguish or prevent the formation of arcs the fusible conductor is surrounded bv a substance which is normally inert but explodes by chemical reaction with the metallic vapour into which the conductor is converted on a heavy overload. Preferably the fuse consists of a copper wire which passes through a tube containing a mixture of finely divided lime with about 5 per cent of finely divided calcium carbide; one or two drops of water being added to provide a little free acetylene. When the fuse blows the copper vapour and calcium carbide provide the explosion, the lime serving to dissipate and cool the arc-forming metallic vapours. Such fuses are also suitable for ordinary overload protection, the copper then combining quietly with the carbide to form a high resistance tube. To increase the explosive action a little nitro-cellulose or similar explosive may be added to the mixture.
GB2244024A 1924-09-23 1924-09-23 Improvements in electrical fuses Expired GB244825A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2244024A GB244825A (en) 1924-09-23 1924-09-23 Improvements in electrical fuses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2244024A GB244825A (en) 1924-09-23 1924-09-23 Improvements in electrical fuses

Publications (1)

Publication Number Publication Date
GB244825A true GB244825A (en) 1925-12-23

Family

ID=10179386

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2244024A Expired GB244825A (en) 1924-09-23 1924-09-23 Improvements in electrical fuses

Country Status (1)

Country Link
GB (1) GB244825A (en)

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