US3317689A - Cartridge fuses with non-porous arc-quenching material - Google Patents

Cartridge fuses with non-porous arc-quenching material Download PDF

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Publication number
US3317689A
US3317689A US355603A US35560364A US3317689A US 3317689 A US3317689 A US 3317689A US 355603 A US355603 A US 355603A US 35560364 A US35560364 A US 35560364A US 3317689 A US3317689 A US 3317689A
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US
United States
Prior art keywords
mass
fusible elements
end caps
barrel
cartridge
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
US355603A
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English (en)
Inventor
Saudicoeur Louis Joseph
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.)
Lucien Ferraz et Cie SA
Original Assignee
Lucien Ferraz et Cie SA
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 Lucien Ferraz et Cie SA filed Critical Lucien Ferraz et Cie SA
Application granted granted Critical
Publication of US3317689A publication Critical patent/US3317689A/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
    • H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
    • H01H69/02—Manufacture of fuses
    • 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
    • H01H85/0456—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 knife-blade 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
    • 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
    • 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
    • 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
    • H01H85/0013—Means for preventing damage, e.g. by ambient influences to the fuse
    • H01H85/0017—Means for preventing damage, e.g. by ambient influences to the fuse due to vibration or other mechanical forces, e.g. centrifugal forces

Definitions

  • the present invention relates to cartridge fuses of the kind comprising fusible Wires or strips embedded within a mass of arc quenching material between two end caps which carry appropriate contact devices, such as blades or tags.
  • the fusible elements are embedded in a moulded mass of compact solid mineral silicate. Such a mass is substantially unaffected by the temperatures which the fusible elements may reach in normal operation and even if some kind of reaction takes place it only leads to the formation of a highly insulating glass.
  • the cartridge fuse according to the invention may be manufactured by first disposing the fusible elements and the end caps in the outer tubular body or barrel, by injecting thereinto a plastic mass of aqueous sodium silicate and in thereafter heating the cartridge at about 150 C. for eliminating the excess of water. The mass then sets in the form of a compact hard solid body.
  • Pure pulverulent silica may conveniently be added as a filler to the aqueous silicate before proceeding to the injection step.
  • the pulverulent silica may be introduced into the outer barrel before the injection step.
  • FIG. 1 is a longitudinal section of a cartridge fuse according to this invention, comprising an outer barrel.
  • FIG. 2 is a longitudinal section of a modified embodiment having an inner cavity filled with an arc quenching fluid.
  • the contacting blades 1 are formed integral with cylindrical end caps 2 which are fixed by radical screws such as 3 at both ends of an outer tubular body or barrel 4 made of an appropriate insulating material.
  • the end caps 2 comprise inner central bosses 5 on which are soldered the ends of fusible elements 6, such as silver strips.
  • the outer barrel 4 has a lateral hole 4a through which a plastic mass of mineral silicate has been injected into the said outer barrel.
  • This mixture has set in the form of a compact solid body 7 in which the fusible elements are wholly embedded and are thus fully protected against shocks, vibrations or accelerations. Further the silicate mass 7 is unaffected by the temperatures to which the fusible elements may be brought in normal operation, and in any case it could only be transformed into a highly insulating anhydrous glass-like substance without producing any carbon deposit between the end caps 2.
  • the injection hole 401 is of course sealed by the silicate mixture itself. It is besides obvious that this hole could also be provided in one of the end caps 2.
  • the crosssection of the outer barrel may be circular, square, rectangular, polygonal, or of any other shape, as desired.
  • the cartridge fuse of FIG. 2 is substantially similar to the embodiment of FIG. 1, but it comprises an inner cavity 8 with a canal which opens laterally through the outer barrel 4, the fusible elements 6 being exposed in the said cavity.
  • This cavity 8 has been filled with an arc quenching fluid, such as sulphur hexafluoride SP and it has been sealed by means of a plug 9.
  • an arc quenching fluid such as sulphur hexafluoride SP
  • the cavity 8 may be realized by means of a small wax core moulded on the fusible elements 6 and disposed in the outer barrel together with these elements. When the silicate mass has been injected and has set, this core is easily eliminated by fusion.
  • the sulphur hexafluoride could be contained in a small glass bulb disposed in the central zone of the cartridge and which would break or burst under the action of heat when the fusible elements melt.
  • a cartridge fuse comprising an open-ended insulating outer tubular barrel having a lateral hole; two electrically conducting end caps, each secured to one end of said barrel so as to define an intermediate inner space therein; electrically conducting fusible elements connecting said end caps with each other within said inner space; and a compact, solid and non-porous mass of a watersoluble mineral silicate embedding said fusible elements and substantially filling said inner space and lateral hole to prevent relative shocks and vibrations of the cartridge fuse assembly.
  • a cartridge fuse comprising an open-ended insulating outer tubular barrel; two electrically conducting end caps, each secured to one end of said barrel so as to define an intermediate inner space therein; electrically conducting fusible elements connecting said end caps with each Patented May 2, 1967- other within said inner space; and a compact, solid and non-porous mass of a Water-soluble mineral silicate embedding said fusible elements and substantially filling said inner space, said mass having formed therein a substantially central cavity in which said fusible elements are exposed, and said cavity being filled with an arc-quenching fluid.
  • the tubular barrel and the non-porous mass having registering holes therein through which the arc-quenching fluid is introduced, and a plug insert sealing said registering holes to retain said fluid in said inner space.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuses (AREA)
US355603A 1963-04-05 1964-03-30 Cartridge fuses with non-porous arc-quenching material Expired - Lifetime US3317689A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR43523A FR83398E (fr) 1963-04-05 1963-04-05 Perfectionnements aux fusibles électriques

Publications (1)

Publication Number Publication Date
US3317689A true US3317689A (en) 1967-05-02

Family

ID=9694364

Family Applications (1)

Application Number Title Priority Date Filing Date
US355603A Expired - Lifetime US3317689A (en) 1963-04-05 1964-03-30 Cartridge fuses with non-porous arc-quenching material

Country Status (5)

Country Link
US (1) US3317689A (fr)
CH (1) CH413062A (fr)
DE (1) DE1294529B (fr)
FR (1) FR83398E (fr)
GB (1) GB1010128A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050134422A1 (en) * 2003-12-19 2005-06-23 Okuniewicz Richard J. MEDIUM VOLTAGE FUSES: sheathed element reduces I2t energy during short-circuit operation
US20150340188A1 (en) * 2014-05-22 2015-11-26 Littelfuse, Inc. Porous inlay for fuse housing
US20160141140A1 (en) * 2014-05-22 2016-05-19 Littelfuse, Inc. Insert for fuse housing
RU191172U1 (ru) * 2019-03-20 2019-07-29 Федеральное государственное автономное образовательное учреждение высшего образования "Крымский федеральный университет имени В.И. Вернадского" Плавкий предохранитель
EP4657486A1 (fr) * 2024-05-29 2025-12-03 Littelfuse, Inc. Tampon de matériau de remplissage moulé pour dispositifs fusibles

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967228A (en) * 1975-10-09 1976-06-29 General Electric Company Electric current limiting fuse having a filter disposed in one end cap
DE2928822A1 (de) * 1979-07-17 1981-02-05 Siemens Ag Hochspannungs-hochleistungssicherung
GB8519601D0 (en) * 1985-08-05 1985-09-11 Dubilier Plc Time-lag fuses
FR2632449B1 (fr) * 1988-06-07 1990-09-14 Ferraz Procede pour la realisation de fusibles electriques a sable agglomere

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190220483A (en) * 1902-09-19 1903-07-23 Oliver Leopold Peard Improvements in Electric Safety Fuses.
US1266479A (en) * 1916-09-18 1918-05-14 Victor G Jensen Fuse.
US1270335A (en) * 1914-12-17 1918-06-25 Edmund O Schweitzer Fuse device.
US1480225A (en) * 1921-09-08 1924-01-08 Western Electric Co Electrical cut-out
US1614014A (en) * 1925-01-08 1927-01-11 Thomas E Murray Electric fuse
US1873339A (en) * 1927-04-02 1932-08-23 Edmund O Schweitzer Fuse
US1965239A (en) * 1930-10-22 1934-07-03 Hill George Leslie High potential fuse
US2223959A (en) * 1937-05-04 1940-12-03 Gen Electric Current limiting fuse
US2337504A (en) * 1940-09-19 1943-12-21 Westinghouse Electric & Mfg Co Current limiting fuse
US2493434A (en) * 1946-03-21 1950-01-03 Joslyn Mfg And Supply Company Method of manufacturing fuse links
US2539261A (en) * 1949-11-26 1951-01-23 Pennsylvania Salt Mfg Co Fuse
US2837614A (en) * 1953-10-19 1958-06-03 Mc Graw Edison Co Protectors for electric circuits
US2866040A (en) * 1957-09-13 1958-12-23 Gen Electric Low-voltage current-limiting fuse
US3005074A (en) * 1959-02-26 1961-10-17 Mc Graw Edison Co Circuit interrupting devices
US3166656A (en) * 1960-04-04 1965-01-19 Driescher Spezialfab Fritz Cartridge fuse

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB369550A (en) * 1929-10-08 1932-03-24 Philips Nv Improvements in or relating to fuses for high voltages
DE631359C (de) * 1934-03-25 1936-06-18 Siemens Schuckertwerke Akt Ges Elektrische Schmelzsicherung

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190220483A (en) * 1902-09-19 1903-07-23 Oliver Leopold Peard Improvements in Electric Safety Fuses.
US1270335A (en) * 1914-12-17 1918-06-25 Edmund O Schweitzer Fuse device.
US1266479A (en) * 1916-09-18 1918-05-14 Victor G Jensen Fuse.
US1480225A (en) * 1921-09-08 1924-01-08 Western Electric Co Electrical cut-out
US1614014A (en) * 1925-01-08 1927-01-11 Thomas E Murray Electric fuse
US1873339A (en) * 1927-04-02 1932-08-23 Edmund O Schweitzer Fuse
US1965239A (en) * 1930-10-22 1934-07-03 Hill George Leslie High potential fuse
US2223959A (en) * 1937-05-04 1940-12-03 Gen Electric Current limiting fuse
US2337504A (en) * 1940-09-19 1943-12-21 Westinghouse Electric & Mfg Co Current limiting fuse
US2493434A (en) * 1946-03-21 1950-01-03 Joslyn Mfg And Supply Company Method of manufacturing fuse links
US2539261A (en) * 1949-11-26 1951-01-23 Pennsylvania Salt Mfg Co Fuse
US2837614A (en) * 1953-10-19 1958-06-03 Mc Graw Edison Co Protectors for electric circuits
US2866040A (en) * 1957-09-13 1958-12-23 Gen Electric Low-voltage current-limiting fuse
US3005074A (en) * 1959-02-26 1961-10-17 Mc Graw Edison Co Circuit interrupting devices
US3166656A (en) * 1960-04-04 1965-01-19 Driescher Spezialfab Fritz Cartridge fuse
US3196521A (en) * 1960-04-04 1965-07-27 Driescher Spezialfab Fritz Fuse cartridge

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050134422A1 (en) * 2003-12-19 2005-06-23 Okuniewicz Richard J. MEDIUM VOLTAGE FUSES: sheathed element reduces I2t energy during short-circuit operation
US20150340188A1 (en) * 2014-05-22 2015-11-26 Littelfuse, Inc. Porous inlay for fuse housing
US20160141140A1 (en) * 2014-05-22 2016-05-19 Littelfuse, Inc. Insert for fuse housing
US9607799B2 (en) * 2014-05-22 2017-03-28 Littelfuse, Inc. Porous inlay for fuse housing
US9892880B2 (en) * 2014-05-22 2018-02-13 Littelfuse, Inc. Insert for fuse housing
RU191172U1 (ru) * 2019-03-20 2019-07-29 Федеральное государственное автономное образовательное учреждение высшего образования "Крымский федеральный университет имени В.И. Вернадского" Плавкий предохранитель
EP4657486A1 (fr) * 2024-05-29 2025-12-03 Littelfuse, Inc. Tampon de matériau de remplissage moulé pour dispositifs fusibles

Also Published As

Publication number Publication date
FR83398E (fr) 1964-07-31
CH413062A (fr) 1966-05-15
DE1294529B (de) 1969-05-08
GB1010128A (en) 1965-11-17

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