US3257527A - Cartridge fuse having spacer disc - Google Patents

Cartridge fuse having spacer disc Download PDF

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Publication number
US3257527A
US3257527A US292057A US29205763A US3257527A US 3257527 A US3257527 A US 3257527A US 292057 A US292057 A US 292057A US 29205763 A US29205763 A US 29205763A US 3257527 A US3257527 A US 3257527A
Authority
US
United States
Prior art keywords
fuse
bore
spacer disc
spacer
elements
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 - Lifetime
Application number
US292057A
Other languages
English (en)
Inventor
Jacks Eric
Ollerton George William
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.)
English Electric Co Ltd
Original Assignee
English 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 English Electric Co Ltd filed Critical English Electric Co Ltd
Application granted granted Critical
Publication of US3257527A publication Critical patent/US3257527A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H01H85/12—Two or more separate fusible members in parallel
    • 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
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/044—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified
    • H01H85/045—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified cartridge type
    • H01H85/0458—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified cartridge type with ferrule type end contacts
    • 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
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/18—Casing fillings, e.g. powder
    • H01H85/185—Insulating members for supporting fusible elements inside a casing, e.g. for helically wound fusible elements

Definitions

  • the fuse elements are spaced at a predetermined distance from each other and from. the inside walls of the fuse body. In medium voltage fuses this is often accomplished by suitably positioning the elements at the fuse caps. However, in the case of fuses above 1000 volts the length of element required is suchthat it becomes advisable to provide additional support for the elements at intermediate points along their length and this is often achieved by winding the elements on a lstar-shaped former.
  • a disadvantage of this arrangement is that whilst accurate spacing of the elements from the fuse body wall is maintained, the spacing between the elements themselves is left to the judgment of the operative.
  • a cartridge fuse having a plurality of fuse elements includes at least one spacer disc mounted in the 4bore of the fuse body and means for locating said spacer disc or discs at a predetermined position or positions respectively along the length of the bore, holes or slots being provided in the spacer disc or discs for the location of a said fuse element lin each said hole or slot, the holes or slots being positioned so as to locate the fuse elements relative to each other and to the bore ofthe fuse body.
  • two or more said spacer discs are mounted in the bore of the fuse body, the 'spacer discs being fitted into the bore of the fuse body with an interlocking relationship which prevents rotation of the spacer discs about the axis of the fuse body bore.
  • the outer periphery of the spacer discs and the bore of the fuse body have a D-shape so as to provide said interlocking relationship.
  • FIG. 1 is a sectional elevation of one form of high voltage fuse according to the invention.
  • FIG. 2 is a sectional view on the line A--A in FIG. 1.
  • the fuse comprises a ceramic fuse body having a D-shapedbore.
  • the fuse body contains three ceramic liners 11 also of D-shape and having a thin Wall section in relation to the diameter of the liner.
  • the liners 11 are a sliding t in the fuse body 10 and serve to locate axially four ceramic spacer discs 12, two of which are disposed at the ends of the fuse body 10 and two at intermediate points along the length.
  • the spacersv 12 are annular members having a D-shaped outer periphery enabling the spacers to be 1ocated circumferentially in the fuse body bore and have a bore formed with radial slots 13 bearing a fixed relationship to the D-shaped periphery s-o that the slots in all the spacers are in alignment.
  • the fuse body bore contains quartz filling.
  • the fuse described above employs four spacers 12 with a ceramic liner 11 between each pair of spacers.
  • a single spacer is located at the centre of the fuse body. In this case the need for aligning spacers does not arise and the shape of the fuse body bore, the liners, and the spacers, is circular.
  • the distance between the spacers or, in the case of a single spacer, between the spacer and the end cap should not exceed four inches.
  • a cartridge fuse comprising a plurality of fuse elements having spacer disc means mounted in the bore of a fuse body and ⁇ including liner means for locating said spacer disc means at a predetermined position along the length of said bore, fuse element positioning means formed in said spacer disc means to locate said fuse elements relative to each other and to the bore of said fuse body, said spacer disc means having an external periphery irregularly shaped to correspond with a similar irregularly shaped cross-section of the bore of said fuse body to interlock and prevent rotation of said spacer disc means about the axis of said fuse body.
  • a cartridge fuse according to claim 1 wherein the locating means comprises a number of liners which are slidably mounted in the bore of the fuse body, at least one spacer disc being located between two said liners.
  • a cartridge fuse comprising a body having inner walls defining a hollow bore
  • each said disc being mounted between two adjacent liners and comprising a wall portion defining a like plurality of mutually spaced apertures through each of which extends a corresponding one of said fusible elements, each fusible element engaging, and being supported by, the said wall portion of the spacer disc.
  • each hollow liner and spacer disc has an outer periphery the shape of which is asymmetrical and matches the shape of the inner walls of said body.
  • a cartridge fuse comprising 10.
  • a cartridge fuse according to claim 9, comprising a tubular elongate -body of electrically insulating a plurality of said spacer discs, each ⁇ spacer disc and material having inner walls deining a cylindrical hollow liner having an outer periphery the shape of which bore, is asymmetrical and matches the shape of the inner walls two electrically conductive end caps respectively 5 of said body.
  • a cartridge fuse according to claim 10 wherein the and together closing said bore, space Within the Whole bore contains a quartz filling. a plurality of fusible elements extending through said bore and connected to and between the said end References Cite by the Examiner Caps, 10 UNITED STATES PATENTS a plurality of cylindrical liners surrounding said fusible elements and mounted Within, and in slidable en- 1447798 3/1923 McDonald r 20o-132 gagement with, the said inner walls of the body, and 1,946,553 2/1934 Sundt 20o-131 at least one electrically insulating spacer disc extending 2,090,220 8/ 1937 Moor ZOO-131 across said bore, each said disc being I nounted be- 15 2,337,504 12/1943 Strom 200 120 a 35161;ggz)I?(iiiiinghgeugligodpregses spaced 2809254 10/1957 Edsau u 20o-120 both from each other and said

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  • Fuses (AREA)
US292057A 1962-07-06 1963-07-01 Cartridge fuse having spacer disc Expired - Lifetime US3257527A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25962/62A GB1041216A (en) 1962-07-06 1962-07-06 Improvements relating to fuses

Publications (1)

Publication Number Publication Date
US3257527A true US3257527A (en) 1966-06-21

Family

ID=10236140

Family Applications (1)

Application Number Title Priority Date Filing Date
US292057A Expired - Lifetime US3257527A (en) 1962-07-06 1963-07-01 Cartridge fuse having spacer disc

Country Status (6)

Country Link
US (1) US3257527A (en:Method)
DE (1) DE1463105A1 (en:Method)
ES (1) ES289691A1 (en:Method)
FR (1) FR1361714A (en:Method)
GB (1) GB1041216A (en:Method)
NL (1) NL294995A (en:Method)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3801947A (en) * 1971-02-16 1974-04-02 Westinghouse Electric Corp Electric fuse with improved casing

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336521A (en) * 1981-03-11 1982-06-22 Kozacka Frederick J Electric fuse
CN105679622B (zh) * 2016-02-26 2017-10-31 广东中贝能源科技有限公司 一种石英砂熔断器及其制造方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL29192C (en:Method) *
US1447798A (en) * 1918-02-28 1923-03-06 Chicago Fuse Mfg Co Refillable cartridge fuse
US1946553A (en) * 1932-01-20 1934-02-13 Edward V Sundt Low-capacity fuse construction
US2090220A (en) * 1936-01-25 1937-08-17 Henleys Telegraph Works Co Ltd Electric fuse of the cartridge type
US2337504A (en) * 1940-09-19 1943-12-21 Westinghouse Electric & Mfg Co Current limiting fuse
US2809254A (en) * 1955-04-12 1957-10-08 Chase Shawmut Co Composite fusible protective device
US2898425A (en) * 1957-02-25 1959-08-04 English Electric Co Ltd Cartridge fuse links

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL29192C (en:Method) *
US1447798A (en) * 1918-02-28 1923-03-06 Chicago Fuse Mfg Co Refillable cartridge fuse
US1946553A (en) * 1932-01-20 1934-02-13 Edward V Sundt Low-capacity fuse construction
US2090220A (en) * 1936-01-25 1937-08-17 Henleys Telegraph Works Co Ltd Electric fuse of the cartridge type
US2337504A (en) * 1940-09-19 1943-12-21 Westinghouse Electric & Mfg Co Current limiting fuse
US2809254A (en) * 1955-04-12 1957-10-08 Chase Shawmut Co Composite fusible protective device
US2898425A (en) * 1957-02-25 1959-08-04 English Electric Co Ltd Cartridge fuse links

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3801947A (en) * 1971-02-16 1974-04-02 Westinghouse Electric Corp Electric fuse with improved casing

Also Published As

Publication number Publication date
ES289691A1 (es) 1963-12-01
NL294995A (en:Method)
GB1041216A (en) 1966-09-01
DE1463105A1 (de) 1969-01-02
FR1361714A (fr) 1964-05-22

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