US3196521A - Fuse cartridge - Google Patents

Fuse cartridge Download PDF

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Publication number
US3196521A
US3196521A US56722A US5672260A US3196521A US 3196521 A US3196521 A US 3196521A US 56722 A US56722 A US 56722A US 5672260 A US5672260 A US 5672260A US 3196521 A US3196521 A US 3196521A
Authority
US
United States
Prior art keywords
link
shell
mold
core
bodies
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
US56722A
Other languages
English (en)
Inventor
Hollmann Fritz
Emmerich Hans
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.)
Fritz Driescher KG Spezialfabrik fur Elektrizitatswerksbedarf GmbH
Original Assignee
Fritz Driescher KG Spezialfabrik fur Elektrizitatswerksbedarf GmbH
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 Fritz Driescher KG Spezialfabrik fur Elektrizitatswerksbedarf GmbH filed Critical Fritz Driescher KG Spezialfabrik fur Elektrizitatswerksbedarf GmbH
Priority to US461661A priority Critical patent/US3317690A/en
Application granted granted Critical
Publication of US3196521A publication Critical patent/US3196521A/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49107—Fuse making

Definitions

  • end plates or caps are each provided in addition with a T-shaped appendage projecting radially outward beyond the periphery of the insulator to be engaged by an insulating handle for inserting the cartridge in and removin it from a socket without danger of touching live parts.
  • the object of the invention is to provide a fuse cartridge of the kind referred to, requiring only a minimum of individual parts for fuses of the said kind, their a sembly requiring no auxiliary equip sent and only a minimum of manual labor.
  • the terminals which are subject to some mechanical stress, become quite firmly seated in the wall of the cast casing, especially when provided with rough spots, recesses or projections located Within the casing wall.
  • the appendages with T-shaped or hammerhead ends for engaging a handle may be attached to the terminals in conventional manner, and likewise imbedded in casing material except for their exposed outside ends.
  • the new type of fuse cartridge alternatively permits insertion of these appendages in the casing wall, advantageously in thickened parts thereof, in such manner that fz fllliifizl Patented July 27, 1965 they do not touch the terminals themselves and are thus electrically insulated from them.
  • a fuse of the kind described may be fabricated in various ways involving, in each instance, the consecutive formation of two bodies of nonconductive material in nested relationship about that part of the aforedescribed unit which includes the fusible link and the adjoining ends of the two terminal members.
  • One method consists in that the link and terminals fixedly joined thereto are molded in an arc-quenching agent, with addition of a small quantity of binder that will not impair porosit and after the binder has set, the resulting molded quencher core and inner portions of the terminals projecting therefrom are enveloped with cast casing material in a suitably larger mold.
  • Another method giving equally good results but more efficient in some cases, consists in that the outer casing or shell is centrifugally cast in a mold fitted with the link and terminals fixedly joined thereto, and thus at the same time united to the live parts, and after the casing material ie. a cyntheti resin) has set, the resulting casing is filled with qunching substance through a cored or drilled in the former case, two molds are required to make the fuse cartridge, one having a smaller cavity to receive only the link and terminals directly connected thereto.
  • a suitable device consists of a mold receiving the link and terminals and having two projecting gudgeons on the same centenine as the cartridge, by means of which the mold is rotatably mounted in a frame; this frame in turn is rotationally driven about a shaft perpendicular to the centerline of the gudgeons, and has a disk which is centered on its axis of rotation and on which rolls a friction disk fixed on one of the gudgeons of the mold.
  • Centrifugal casting devi es are likewise conceivable i which the mold is rotated on more than two axes. With correct choice of speeds of rotation about each axis, these will afford an especially uniform casing wall, and many variations in distribution of material may be obtained by varying these speeds. However, experience has shown that molds rotatin on only two mutually perpendicular axes will definitely afford adequate uniformity of Wall thickness, and also, by regulation of speeds, permit the formation of enlarged deposit of material at the points where the fuse is exposed to greater mechanical stress. For their simplicity of construction, therefore, such devices would generally be preferred.
  • FIG. 1 shows a top view of a prefabricated link assembly
  • FIG. 2 shows a front view of the same
  • FIG. 3 shows a cross section of a mold in which the said assembly is being imbedded in quenching medium
  • FIG. 4 shows a cross section of a mold for casting a casing
  • FIG. 5 is a pictorial view of the final product of the foregoing operations
  • FIG. 6 is a pictorial view of a device for centrifugal casting of a hollow cartridge casing
  • FIG. 7 is a front view of the same.
  • FIG. 8 is an end View of the same.
  • FIGS. 1 and 2 The assembly in FIGS. 1 and 2 consists of two terminals 1 and 2, in the form of knife-like contact tabs, to each of which a lateral appendage 3, 4 is attached. These appendages, whose hammerhead extremities extend beyond the confines of the fuse cartridge, serve to couple a manipulating handle with the finished cartridge. At their confronting ends, terminals 1 and 2 are connected by two fusible links 5 and 6. Between appendages 3, 4 and the points of attachment of the links 5, 6, the terminals 1, 2 have recesses 7 to be locate-d within the casing wall of the finished fuse cartridge.
  • the mold of FIG. 3 consists of two halves 8 and 9, for casting the core of porous arc-quenching material 10 enveloping the links 5, 6. These two halves accommodate the terminals 1 and 2, with appendages 3 and 4, and provide a cavity in the shape of the inner core around the links 5, 6 and their points of attachment to terminals 1 and 2. A part 11 in half 8 serves to admit quenching substance with a small quantity of binder added.
  • the mold of FIG. 4 for casting the casing or shell 12 similarly consists of two parts 13 and 14, accommodating the portions of terminals 1 and 2 projecting from the casing, and forms a cavity greater by the wall thickness of the casing than the core 10.
  • the shell 12 integrally formed in this mold embraces the conductor members 1, 2 received therein.
  • the mold 13, 14 may be modified so as to enlarge its cavity at the inner portions of the terminals, so that a fuse cartridge cast in it may have somewhat the form represented in FIG. 5.
  • the mold 15 receiving the prefabricated unit of FIGS. 1 and 2 has a cavity, around links 5, 6, conforming to the shape of a cartridge casing of the kind shown in FIG. 5.
  • the mold 15 is provided with two gudgeons 16 and 17 on the same centerline as the fuse, and these are mounted in a frame 18.
  • the frame 13 is supported by two gudgeons 19, 20, for rotation about an axis perpendicularly bisecting the centerline of gudgeons 16, 17, and can be driven in the direction of the arrow (FIG. 8).
  • frame 18 On one side, frame 18 has a disk 21 which turns with it about its axis of rotation and upon which there rolls a friction disk 22, non-rotatably mounted on gudgeon 16 of mold 115 but longitudinally adjustable thereon for example along a track 23 (FIG. 6).
  • the mold 15 has a cylindrical boss 24, directed into the cavity and visible in FIG. 8, for coring a hole to be afterwards used to introduce comminuted quenching material into the casing for forming the core 10 of FIGS. 2 and 3.
  • the mold 15 may in addition he provided with a closable port (not shown) for introduction of a predetermined quantity of synthetic resin serving as the cast-
  • a closable port not shown
  • the shell 12 formed within the mold 15 is anchored to intermediate portions of the terminal memhers 1, 2 just beyond the ends joined to the fusible link 5, 6 which are to be imbedded in the porous core 10.
  • a method of making a cartridge fuse comprising the steps of producing a conductive unit including a pair of spaced-apart elongated conductor members having confronting ends joined by a fusible link, and consecutively forming two bodies of nonconductive material in nested relationship about said link and said confronting ends, one of said bodies being a porous inner core of arc-quenching material completely enveloping said link and said confronting ends, the other of said bodies being an integrally molded one piece shell of synthetic resin closely surrounding said core in direct contact with the entire core surface while letting outer extremities thereof project outwardly from the shell, the molding of said shell being carried out in a split mold having a cavity accommodating said link and said confronting ends, upon a gripping of said outer extremity between separable parts of the mold, with an all-around clearance corresponding to the combined thickness of said shell and said core.
  • a method of making a cartridge fuse comprising the steps of producing a conductive unit including a pair of spaced-apart elongated conductor members having confronting ends joined by a fusible link, and consecutively forming two bodies of nonconductive material in nested relationship about said link and said confronting ends, one of said bodies being a porous inner core of arcquenching material extending around said link and said confronting ends, the other or" said bodies being an integrally molded shell of synthetic resin formed before said core and closely enveloping said core and embracing said conductor members while letting outer extremities thereof project outwardly from the shell, the step of forming said shell including placing aid conductive unit with the exception of said projecting extremities in a rotatable mold, partly filling said mold with moldable synthetic UNITED STATES PATENTS 1,862,317 6/32 Ringwald 200-420 1,875,031 8/32 Landau.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuses (AREA)
US56722A 1960-04-04 1960-09-19 Fuse cartridge Expired - Lifetime US3196521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US461661A US3317690A (en) 1960-04-04 1965-06-07 Fuse cartridge

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DED33033A DE1202892B (de) 1960-04-04 1960-04-04 Sicherungspatrone
DED34704A DE1296693B (de) 1960-04-04 1960-11-10 Verfahren zum Herstellen von Sicherungspatronen
DED0035316 1961-02-01

Publications (1)

Publication Number Publication Date
US3196521A true US3196521A (en) 1965-07-27

Family

ID=27209695

Family Applications (2)

Application Number Title Priority Date Filing Date
US56722A Expired - Lifetime US3196521A (en) 1960-04-04 1960-09-19 Fuse cartridge
US84769A Expired - Lifetime US3166656A (en) 1960-04-04 1961-01-25 Cartridge fuse

Family Applications After (1)

Application Number Title Priority Date Filing Date
US84769A Expired - Lifetime US3166656A (en) 1960-04-04 1961-01-25 Cartridge fuse

Country Status (7)

Country Link
US (2) US3196521A (xx)
CH (3) CH381312A (xx)
DE (2) DE1202892B (xx)
FI (1) FI40397B (xx)
IT (1) IT699995A (xx)
LU (2) LU39090A1 (xx)
NL (3) NL272345A (xx)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3317689A (en) * 1963-04-05 1967-05-02 Ferraz & Cie Lucien Cartridge fuses with non-porous arc-quenching material
US3319027A (en) * 1965-01-26 1967-05-09 Chase Shawmut Co Encapsulated fuse structure for polyphase circuits
US3337705A (en) * 1964-01-27 1967-08-22 Chase Shawmut Co Fusible protective device
US3368047A (en) * 1967-06-19 1968-02-06 Westinghouse Electric Corp Fuse having a sand core
US3654696A (en) * 1970-01-29 1972-04-11 Bernard Wechsler Method for manufacturing electric fuses
US3914863A (en) * 1972-05-04 1975-10-28 Gerald Wiebe Method of forming a fuse

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3317690A (en) * 1960-04-04 1967-05-02 Driescher Spezialfab Fritz Fuse cartridge
US3268698A (en) * 1963-08-12 1966-08-23 Westinghouse Electric Corp Electrical apparatus comprising sulfur hexafluoride and organic insulation with anhydrous calcium sulfate
US3358064A (en) * 1964-03-24 1967-12-12 Vitramon Inc Encapsulating molding composition and method for molding the same
US3838375A (en) * 1973-01-29 1974-09-24 Gen Electric Current limiting fuse
DE2928822A1 (de) * 1979-07-17 1981-02-05 Siemens Ag Hochspannungs-hochleistungssicherung
US4313099A (en) * 1980-01-03 1982-01-26 Mcgraw-Edison Company Current limiting fuse having aluminum sulfate arc-quenching filler
US5670926A (en) * 1995-06-08 1997-09-23 General Electric Company High-voltage fuse having a core of bound silica sand about which fusible elements are wound
EP1162640A1 (de) 2000-06-07 2001-12-12 Abb Research Ltd. Löschmedium zum Löschen von Lichtbögen
US6642833B2 (en) 2001-01-26 2003-11-04 General Electric Company High-voltage current-limiting fuse
FI117587B (fi) 2004-06-18 2006-11-30 Nethawk Oyj Menetelmä, laite ja tietokoneohjelmatuote tiedonsiirtoyhteyksien monitorointiin
DE102013208135B4 (de) 2013-05-03 2023-11-09 Robert Bosch Gmbh Batterie mit Überladungsschutz

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1862317A (en) * 1927-12-23 1932-06-07 Schweitzer & Conrad Inc Fuse
US1875031A (en) * 1928-11-10 1932-08-30 Gen Chemical Corp Machine for making wax bottles
US1934459A (en) * 1928-03-23 1933-11-07 Gen Electric High vacuum fuse
US2493434A (en) * 1946-03-21 1950-01-03 Joslyn Mfg And Supply Company Method of manufacturing fuse links
US2681398A (en) * 1953-03-27 1954-06-15 Chase Shawmut Co Fluid-tight fuse structure
US2740187A (en) * 1955-03-07 1956-04-03 Chase Shawmut Co Methods of assembling fuses
US2830156A (en) * 1956-12-21 1958-04-08 Jr Arthur A Burgess Shock and vibration resistant fuse
US2847707A (en) * 1956-01-23 1958-08-19 Walter J Maker Apparatus for encapsulating articles in a plastic coating
US2892061A (en) * 1958-07-24 1959-06-23 Chase Shawmut Co Fuses with fulgurite suppressing means
US2895031A (en) * 1958-07-24 1959-07-14 Chase Shawmut Co Fusible protective devices
US2940161A (en) * 1955-10-11 1960-06-14 Western Electric Co Methods of making encapsulated electrical devices
US2946092A (en) * 1958-08-04 1960-07-26 Barr Rubber Products Company Apparatus for rotationally distributing a liquid charge within a mold

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE412490C (de) * 1923-07-13 1925-04-23 Elfa Elektrotechnische Fabrik Schmelzeinsatz mit veraenderlichem Querschnitt und mit Umpressung aus Isoliermaterial
US1935885A (en) * 1930-01-15 1933-11-21 Telefunken Gmbh Electrical apparatus
US1947085A (en) * 1931-09-22 1934-02-13 Westinghouse Electric & Mfg Co Electrical apparatus
US2328825A (en) * 1941-09-25 1943-09-07 Schweitzer & Conrad Inc Arc-extinguishing means
US2768264A (en) * 1953-04-28 1956-10-23 Rostone Corp Arc-suppressing device
US2816990A (en) * 1954-09-24 1957-12-17 Westinghouse Electric Corp Circuit breaker
US2948930A (en) * 1955-08-09 1960-08-16 Biwax Corp Method of potting electrical equipment
US2949641A (en) * 1956-06-26 1960-08-23 Whitney Blake Co Electrical connector manufacture
US2941905A (en) * 1957-04-05 1960-06-21 Westinghouse Electric Corp Filled organopolysiloxane coating for electrical members
US2866038A (en) * 1957-05-09 1958-12-23 Chase Shawmut Co Current-limiting fuses with increased interrupting capacity
US2961514A (en) * 1959-01-19 1960-11-22 S & C Electric Co Circuit interrupter
US3030597A (en) * 1958-02-28 1962-04-17 Westinghouse Electric Corp Insulated electrical apparatus

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1862317A (en) * 1927-12-23 1932-06-07 Schweitzer & Conrad Inc Fuse
US1934459A (en) * 1928-03-23 1933-11-07 Gen Electric High vacuum fuse
US1875031A (en) * 1928-11-10 1932-08-30 Gen Chemical Corp Machine for making wax bottles
US2493434A (en) * 1946-03-21 1950-01-03 Joslyn Mfg And Supply Company Method of manufacturing fuse links
US2681398A (en) * 1953-03-27 1954-06-15 Chase Shawmut Co Fluid-tight fuse structure
US2740187A (en) * 1955-03-07 1956-04-03 Chase Shawmut Co Methods of assembling fuses
US2940161A (en) * 1955-10-11 1960-06-14 Western Electric Co Methods of making encapsulated electrical devices
US2847707A (en) * 1956-01-23 1958-08-19 Walter J Maker Apparatus for encapsulating articles in a plastic coating
US2830156A (en) * 1956-12-21 1958-04-08 Jr Arthur A Burgess Shock and vibration resistant fuse
US2892061A (en) * 1958-07-24 1959-06-23 Chase Shawmut Co Fuses with fulgurite suppressing means
US2895031A (en) * 1958-07-24 1959-07-14 Chase Shawmut Co Fusible protective devices
US2946092A (en) * 1958-08-04 1960-07-26 Barr Rubber Products Company Apparatus for rotationally distributing a liquid charge within a mold

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3317689A (en) * 1963-04-05 1967-05-02 Ferraz & Cie Lucien Cartridge fuses with non-porous arc-quenching material
US3337705A (en) * 1964-01-27 1967-08-22 Chase Shawmut Co Fusible protective device
US3319027A (en) * 1965-01-26 1967-05-09 Chase Shawmut Co Encapsulated fuse structure for polyphase circuits
US3368047A (en) * 1967-06-19 1968-02-06 Westinghouse Electric Corp Fuse having a sand core
US3654696A (en) * 1970-01-29 1972-04-11 Bernard Wechsler Method for manufacturing electric fuses
US3914863A (en) * 1972-05-04 1975-10-28 Gerald Wiebe Method of forming a fuse

Also Published As

Publication number Publication date
NL133175C (xx)
LU39561A1 (xx) 1961-02-20
CH392671A (de) 1965-05-31
LU39090A1 (xx) 1960-10-18
CH388431A (de) 1965-02-28
DE1296693B (de) 1969-06-04
NL272345A (xx)
DE1202892B (de) 1965-10-14
NL255898A (xx)
CH381312A (de) 1964-08-31
US3166656A (en) 1965-01-19
IT699995A (xx)
FI40397B (xx) 1968-09-30

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