GB525137A - Improvements in spark quenching arrangements for use in telephone or like systems - Google Patents

Improvements in spark quenching arrangements for use in telephone or like systems

Info

Publication number
GB525137A
GB525137A GB488739A GB488739A GB525137A GB 525137 A GB525137 A GB 525137A GB 488739 A GB488739 A GB 488739A GB 488739 A GB488739 A GB 488739A GB 525137 A GB525137 A GB 525137A
Authority
GB
United Kingdom
Prior art keywords
disc
quenching
casing
spark
metallized
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
GB488739A
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.)
SIDNEY ARTHUR WICKERSON
Automatic Telephone and Electric Co Ltd
Original Assignee
SIDNEY ARTHUR WICKERSON
Automatic Telephone and Electric 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 SIDNEY ARTHUR WICKERSON, Automatic Telephone and Electric Co Ltd filed Critical SIDNEY ARTHUR WICKERSON
Priority to GB488739A priority Critical patent/GB525137A/en
Publication of GB525137A publication Critical patent/GB525137A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/102—Varistor boundary, e.g. surface layers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
    • H04M1/745—Protection devices or circuits for voltages surges on the line

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Fuses (AREA)

Abstract

525,137. Arc-rupturing devices. AUTOMATIC TELEPHONES & ELECTRIC CO., Ltd., and WICKERSON, S. A. Feb. 14, 1939, No. 4887. [Class 38 (v)] [Also in Group XXXV] A spark - quenching and excess - voltage protection device for light-current signalling and control systems consists of a solid body of material, such as a mixture of silicon carbide with carbon and/or tungsten or molybdenum agglomerated under pressure, made up in the form of a disc 10, Fig. 3, moulded within a synthetic resin casing and provided with tags 8, 9 electrically connected with the disc as by soldering to the opposite spray metallized surfaces of the discs or to local metallized spots on the same side of the disc, Fig. 9. The moulded casing has projections 13 on one face and corresponding recesses 14 on the other so that a number of units can be nested together and held by a single fixing. In the multiple arrangement shown in Fig. 9 where the quenching circuits are between the local metal spots on on side and the wholly metallized surface on the other side of the disc, the tags are held in electrical connection by clamping the halves of the casing together by means of rivets. To deal with continued overvoltage, the connection to the quenching disc is taken through a screw having a tip of fusible material which melts as the disc heats up and disconnects the circuit both of the spark quench device and the circuit to be quenched. Specification 515,805, [Group XXXV), is referred to.
GB488739A 1939-02-14 1939-02-14 Improvements in spark quenching arrangements for use in telephone or like systems Expired GB525137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB488739A GB525137A (en) 1939-02-14 1939-02-14 Improvements in spark quenching arrangements for use in telephone or like systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB488739A GB525137A (en) 1939-02-14 1939-02-14 Improvements in spark quenching arrangements for use in telephone or like systems

Publications (1)

Publication Number Publication Date
GB525137A true GB525137A (en) 1940-08-22

Family

ID=9785719

Family Applications (1)

Application Number Title Priority Date Filing Date
GB488739A Expired GB525137A (en) 1939-02-14 1939-02-14 Improvements in spark quenching arrangements for use in telephone or like systems

Country Status (1)

Country Link
GB (1) GB525137A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258635A (en) * 1963-10-25 1966-06-28 Protector wiring device
US4799125A (en) * 1986-09-05 1989-01-17 Raychem Limited Circuit protection arrangement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258635A (en) * 1963-10-25 1966-06-28 Protector wiring device
US4799125A (en) * 1986-09-05 1989-01-17 Raychem Limited Circuit protection arrangement
US4807081A (en) * 1986-09-05 1989-02-21 Raychem Limited Circuit protection arrangement

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