GB616683A - Improvements relating to electrical protective devices - Google Patents

Improvements relating to electrical protective devices

Info

Publication number
GB616683A
GB616683A GB2843046A GB2843046A GB616683A GB 616683 A GB616683 A GB 616683A GB 2843046 A GB2843046 A GB 2843046A GB 2843046 A GB2843046 A GB 2843046A GB 616683 A GB616683 A GB 616683A
Authority
GB
United Kingdom
Prior art keywords
gap
metal
disc
spark
electrodes
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
GB2843046A
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.)
RONALD WILLIAM SILLARS
Metropolitan Vickers Electrical Co Ltd
Original Assignee
RONALD WILLIAM SILLARS
Metropolitan Vickers Electrical 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 RONALD WILLIAM SILLARS, Metropolitan Vickers Electrical Co Ltd filed Critical RONALD WILLIAM SILLARS
Priority to GB2843046A priority Critical patent/GB616683A/en
Publication of GB616683A publication Critical patent/GB616683A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00—Details of spark gaps
    • H01T1/16—Series resistor structurally associated with spark gap

Landscapes

  • Coating By Spraying Or Casting (AREA)
  • Spark Plugs (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)

Abstract

616,683. Protective arrangements. HAMILTON, A., SILLARS, R. W., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Sept. 23, 1946, No. 28430. [Class 38 (iv)] A protective device for low voltage apparatus comprises a spark-gap formed over a surface of silicon carbide material. A flat plate of the material may be interposed between electrodes so that the periphery of the plate forms the spark-over surface. A metal tape as wide as the desired gap may be wound for one turn around the cylindrical surface of a disc or rod and removed after the disc or rod has been metal sprayed. Electrodes of metal foil may be pressed the surface of the material so that their edges are in contact with it and are separated by the desired gap. A disc of the material of the thickness of the gap desired may have its faces sprayed with metal up to the edges, or be clamped between overhanging metal plates, or both. The material referred to is described as a non-linear resistance material composed of a pressed and sintered mixture of carborundum with clay or other binding material and the effect is to increase the gap required for 250 volts to between .005 and .010 inch.
GB2843046A 1946-09-23 1946-09-23 Improvements relating to electrical protective devices Expired GB616683A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2843046A GB616683A (en) 1946-09-23 1946-09-23 Improvements relating to electrical protective devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2843046A GB616683A (en) 1946-09-23 1946-09-23 Improvements relating to electrical protective devices

Publications (1)

Publication Number Publication Date
GB616683A true GB616683A (en) 1949-01-25

Family

ID=10275505

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2843046A Expired GB616683A (en) 1946-09-23 1946-09-23 Improvements relating to electrical protective devices

Country Status (1)

Country Link
GB (1) GB616683A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2919371A (en) * 1954-04-22 1959-12-29 Vickers Electrical Co Ltd Spark-over protective devices for low voltage electrical apparatus
US2960632A (en) * 1955-09-01 1960-11-15 Vickers Electrical Co Ltd Electrical spark-over protective devices
US3087093A (en) * 1959-05-13 1963-04-23 Mallory & Co Inc P R Capacitor protection

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2919371A (en) * 1954-04-22 1959-12-29 Vickers Electrical Co Ltd Spark-over protective devices for low voltage electrical apparatus
US2960632A (en) * 1955-09-01 1960-11-15 Vickers Electrical Co Ltd Electrical spark-over protective devices
US3087093A (en) * 1959-05-13 1963-04-23 Mallory & Co Inc P R Capacitor protection

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