US3843050A - In-line fuse holder - Google Patents

In-line fuse holder Download PDF

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Publication number
US3843050A
US3843050A US00400259A US40025973A US3843050A US 3843050 A US3843050 A US 3843050A US 00400259 A US00400259 A US 00400259A US 40025973 A US40025973 A US 40025973A US 3843050 A US3843050 A US 3843050A
Authority
US
United States
Prior art keywords
fuse
holder
conductive
conductor
lip
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
US00400259A
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English (en)
Inventor
S Melugin
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.)
Lamcor Inc
Original Assignee
Lamcor Inc
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 Lamcor Inc filed Critical Lamcor Inc
Priority to US00400259A priority Critical patent/US3843050A/en
Application granted granted Critical
Publication of US3843050A publication Critical patent/US3843050A/en
Priority to BE167452A priority patent/BE842358Q/fr
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
    • H01H85/20—Bases for supporting the fuse; Separate parts thereof
    • H01H85/201—Bases for supporting the fuse; Separate parts thereof for connecting a fuse in a lead and adapted to be supported by the lead alone

Definitions

  • this invention relatesto moisture and waterproof in-line fuse holders which allows the visibility of a fuse wire and the replacement of the fuse by pulling an attached conductor, and thus an insulation member from about the fuse.
  • in-line fuses have typically been connected by conductive inserts which require a separate insulating member to prevent the conductive inserts from causing sparks-or short circuits when the inserts come in contact with other conductive objects.
  • the conductive inserts tend todeform and thus are rendered poor electrical contacts with repeated replacement of their associated fuse. Other which were awkward and difficult to handle when replacing their associated fuses and also typically resulted in poor insulators.
  • an iii-line fuse holder is formed which provides a moisture and waterproof seal for the conductive cap members or ferrules at each end of thefuse.
  • a molded flexible or pliable material is formed over the ferrule and its associated clip, and, at a lip ofthe molded member proximate the fuse, engages the rim or bead of the ferrule to provide an insulating means to the fuse without hampering the visibility of the fuse wire.
  • the in-line fuse holder provides a vacuum fit or seal which gives good insulation properties while allowing for replacement of the fuse by pulling the associated conductor, which may also be connected or bonded to the insulation of the molded member.
  • in-line fuse holder electrically connected at a first end of a'fuse 11 to a first conductor 12.
  • the conductor 12 has an electrically conductive portion or single or multistrand wire 13 and an insulating portion 14 formed of materials well known in the art, and disposed about the wires 13.
  • the in-line fuse holder is electrically connected, at its second end to a second conductor 15 having an electrically conductive portion 16 and an insulating portion 17 disposed about the conductive portion 16.
  • the fuse 11 is of a standard design and includes a conductive fusable link or fuse wire 18 positioned between spaced ferrules or conductive end cap members, such as ferrule 19.
  • the fuse wire 18 is disposed within a transparent body 20 typically formed of glass, plastic or the like.
  • the ferrule 19 is formed about the fuse 11 in a manner well known in the art and results in a rim 21 formed at the interface of the glass 20 and the ferrule 19. Alternately, the ferrule 19 may be formed with an outer depending flange or bead at the interface of the glass 20 and the ferrule 19.
  • the fusable link or fuse wire 18 allows electric current to flow through such wire without blowing or melting the wire while the electric current is below a selected or specified ampere rating such as 30 or 40 amps. Such fuse wire blows or melts when current above such selected or specified ampere rating flows through the wire.
  • the sensitivity of the fuse wire such as the length of time before blowing, may vary, depending on the various compositions and other factors well known to those skilled in the art.
  • the fuse wire or fusable link 18 may be electrically attached or connected to the conductive cap members or ferrules such as ferrule 19 of the fuse 11 by any manner well known in the art. Typical of such manners are spot welding or soldering of the fuse wire 18 directly to the ferrule 19.
  • Fuse end holder 22 Disposed about the ferrule 19 and frictionally engaging the outer surface of the ferrule 19 is a yieldable conductive clip insert or fuse end holder 22.
  • Fuse end holder 22 may be of any well known construction as long as it ultimately achieves proper electrical contact with the ferrule 19.
  • the fuse end holder 22 is illustrated as comprising a yieldable circular flange portion 23 having a slot therein.
  • the circular flange portion 23 has an inside diameter substantially the same or smaller than the outside diameter of the ferrule 19 in order to provide frictional engagement.
  • the fuse end holder 22 also includes a crimpable portion 24 electrically coupled to the circular flange portion 23 and adapted to be crimpably disposed about the wires 16 in a manner well known in the art.
  • the wires such as wires 16, typically are of a gauge such as a 14 gauge, but may be of any gauge depending upon the application of the fuse.
  • the crimpable member 24 is typically pressed or crimped about the wires 16 to provide proper electrical and mechanical contact thereto. Alternately, a solder composition may be used to assure an electrical connection.
  • Insulating members 25 and 26 are formed over a portion of the-insulators 14 and 17 respectively. At the end rim, edge, borderor bead 21 of the ferrule 19 thereby providing a mositure and waterproof seal with the glass 20 of the fusell
  • the insulating members 25 and 26 are preferably formed by a process of injection 'mold ing, well known in the art, of a material which isrelatively'flexible orpliable so that, while'the lip portion'27 is strong enough to provide a vacuum typeseal to an end of the fuse 11, the pulling of the conductor, such as conductor will allow, the insulating member 26 to be pulled apart from the fuse 11 thereby readily allowing the replacement of the fuse l1.
  • Insulating members 25 and 26 allow substantially the entire glass portion of the fuse 11 to be visible thereby making it, readily apparent-whether the con.-
  • the insulating members and 26 envelop all the conductive portions of the fuse 11 so that the possibility of sparking and/or shorting out is substantially eliminated.
  • the insulating portions 14 and 17 formed about the conductors 12 and 15 may readily be provided with a sealant about the insulatingportions14 and 17 respectively to assure a liquid tight and secure fit at the remote end of the insulation members 25 and 26.
  • the tapered lip like portion such as portion 28 at the remote end of the insulating member 26 disposed about the. conductor 15 provides a suitable frictional seal.
  • the lip portion 28 may, upon being formed, be melted or bonded integrally with the insulation portion 17 to achieve added strength.
  • the lip portion 27 is formedso that its inside diameter is less thanthe outside diameter of the ferrule 19. Alternately, and perferably, the inside diameter of the lip 27 is less than that of the outside diameter ofthe glass portion 18 of the fuse 11.
  • the circular flange member 23 is prevented from being substantially deformed by repeated insertions and extractions of the ferrule of the associated fuses by the strength or resiliency of the molded member 26.
  • a suitable material for forming the insulating members 25 and 26, through the use of well known injection molding techniques, isthe use of polyvinyl chloride plastic compound.
  • the insulating members 25 and 26 may also readily be formed from'rubber, neoprene or other pliable plastic or rubber like material. Suitable candidates are the use of semi-rigid vinyl, nylons, and teflons, etc.
  • the in-line fuse holder of the instant invention also results in a strain relief mechanism in that, when lip 27 is bonded, or securely grips the insulating portion 17 of the conductor 15, the strain of a lateral force applied to the conductor 17 is not transmitted to the fuse end holder 22, but is directed directly to the conductor 15.
  • the in-line fuse holder may readily be color coded and also allows for the easy replacement of fuses with'a readily viewable portion.
  • the instant. fuse holder also providesfan electrical insulation as well as a-moisture and waterproof seal.
  • An in-line holder for a fuse having a conductive end portion coupled to a fuse body comprising:
  • a conductor having anelectrically conductive portion and an insulating portion disposed about said electrically conductive portion
  • a conductive fuse end holder means electrically connected to said electrically conductive portion of said conductor, said fuse end holder means adapted to receive and electrically couple the conductive end portion of the fuse;
  • a flexible member disposed about a part of said insulating portion of said conductor, and about said conductive fuse end holder means and about the entire conductive end portion of the fuse, said flexible member forming an aperture allowing the insertion of a portion of the fuse including the conductive end portion, into electrical and mechanical contact with said fuse end holder means, said flexible member forming a resilient lip means which engages a rim at the junction of the conductive end portion and the fuse.
  • said fuse end holder means includes a circular flange means disposed about the end portion of the fuse and in electrical contact therewith, and a crimping means electrically connected to said circular flange means for providing electrical and mechanical connection to the electrically conductive portion of said conductor.
  • the holder as in claim 10 wherein the flexible molded member is formed of polyvinyl chloride.
  • the method as in claim 14 including the step of bonding a second lip of the molded member with a part of the insulating portion of the conductor.

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  • Fuses (AREA)
US00400259A 1973-09-24 1973-09-24 In-line fuse holder Expired - Lifetime US3843050A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US00400259A US3843050A (en) 1973-09-24 1973-09-24 In-line fuse holder
BE167452A BE842358Q (fr) 1973-09-24 1976-05-28 Porte-fusible en ligne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00400259A US3843050A (en) 1973-09-24 1973-09-24 In-line fuse holder

Publications (1)

Publication Number Publication Date
US3843050A true US3843050A (en) 1974-10-22

Family

ID=23582873

Family Applications (1)

Application Number Title Priority Date Filing Date
US00400259A Expired - Lifetime US3843050A (en) 1973-09-24 1973-09-24 In-line fuse holder

Country Status (2)

Country Link
US (1) US3843050A (fr)
BE (1) BE842358Q (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51122754A (en) * 1975-04-21 1976-10-27 Ramukoo Inc Single wire type holder for fuse and method of manufacturing the holder
US4391485A (en) * 1981-01-09 1983-07-05 Mcgraw-Edison Company In-line fuse holder for miniature plug-in fuse
US4734059A (en) * 1986-05-30 1988-03-29 Lamcor, Inc. In-line fuse holder
US20080180208A1 (en) * 2007-01-30 2008-07-31 Thomas & Betts International, Inc. Fuse Sleeve Having Window for Blown Fuse Indication
USD671079S1 (en) 2011-05-09 2012-11-20 Yazaki North America, Inc. Serviceable inline AC fuse holder
US8342885B2 (en) 2011-05-09 2013-01-01 Yazaki North America, Inc. Serviceable inline AC fuse holder
US9325122B1 (en) 2014-12-11 2016-04-26 Cooper Technologies Company In-line fuse holder with replaceable fuse

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51122754A (en) * 1975-04-21 1976-10-27 Ramukoo Inc Single wire type holder for fuse and method of manufacturing the holder
US4391485A (en) * 1981-01-09 1983-07-05 Mcgraw-Edison Company In-line fuse holder for miniature plug-in fuse
US4734059A (en) * 1986-05-30 1988-03-29 Lamcor, Inc. In-line fuse holder
US20080180208A1 (en) * 2007-01-30 2008-07-31 Thomas & Betts International, Inc. Fuse Sleeve Having Window for Blown Fuse Indication
USD671079S1 (en) 2011-05-09 2012-11-20 Yazaki North America, Inc. Serviceable inline AC fuse holder
US8342885B2 (en) 2011-05-09 2013-01-01 Yazaki North America, Inc. Serviceable inline AC fuse holder
US9325122B1 (en) 2014-12-11 2016-04-26 Cooper Technologies Company In-line fuse holder with replaceable fuse

Also Published As

Publication number Publication date
BE842358Q (fr) 1976-09-16

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