GB702991A - Improvements in or relating to electric over-load devices - Google Patents

Improvements in or relating to electric over-load devices

Info

Publication number
GB702991A
GB702991A GB2266250A GB2266250A GB702991A GB 702991 A GB702991 A GB 702991A GB 2266250 A GB2266250 A GB 2266250A GB 2266250 A GB2266250 A GB 2266250A GB 702991 A GB702991 A GB 702991A
Authority
GB
United Kingdom
Prior art keywords
bosses
springs
protected
salt solution
circuit
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
GB2266250A
Inventor
Thomas Henry Price
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB2266250A priority Critical patent/GB702991A/en
Publication of GB702991A publication Critical patent/GB702991A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/02—Liquid resistors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Elimination Of Static Electricity (AREA)

Abstract

702,991. Electromagnetic switches. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. June 20, 1951 [Sept. 14, 1950]. No. 22662/50. Class 38(5) [Also in Group XL(c)] An electric over-load device primarily for the protection of high voltage and high power valves against damage due to internal discharges, comprises at least one reactance made of or incorporating springy conductive material arranged to be distorted against its natural springiness by the current to move it away from a fixed contact to insert resistance into the protected circuit. In the figure, the device comprises an insulating rod 1 carrying metal bosses 2 with interposed light phosphor-bronze or other metal helical springs 3, which normally press lightly against the bosses. The springs and bosses are connected in series in the circuit to be protected by terminals 8 and brackets 6 supporting the rod 1 within a casing 4 containing a salt solution 5. In the event of an overload, the excess current flowing through the springs causes them to contract and break contact with the bosses 2, the gaps thus formed being bridged by the salt solution so inserting resistance into the protected circuit.
GB2266250A 1950-09-14 1950-09-14 Improvements in or relating to electric over-load devices Expired GB702991A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2266250A GB702991A (en) 1950-09-14 1950-09-14 Improvements in or relating to electric over-load devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2266250A GB702991A (en) 1950-09-14 1950-09-14 Improvements in or relating to electric over-load devices

Publications (1)

Publication Number Publication Date
GB702991A true GB702991A (en) 1954-01-27

Family

ID=10183066

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2266250A Expired GB702991A (en) 1950-09-14 1950-09-14 Improvements in or relating to electric over-load devices

Country Status (1)

Country Link
GB (1) GB702991A (en)

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