US3800263A - Combination terminal and fuse holder arrangement for an electrical circuit - Google Patents

Combination terminal and fuse holder arrangement for an electrical circuit Download PDF

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Publication number
US3800263A
US3800263A US00249791A US24979172A US3800263A US 3800263 A US3800263 A US 3800263A US 00249791 A US00249791 A US 00249791A US 24979172 A US24979172 A US 24979172A US 3800263 A US3800263 A US 3800263A
Authority
US
United States
Prior art keywords
arm
fuse
insulator
passage
electrical circuit
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
US00249791A
Other languages
English (en)
Inventor
G Ammerman
W Mcfarlane
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.)
Heatcraft Inc
Original Assignee
Heatcraft 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 Heatcraft Inc filed Critical Heatcraft Inc
Priority to US00249791A priority Critical patent/US3800263A/en
Priority to IT20339/73A priority patent/IT979069B/it
Priority to FR7305455A priority patent/FR2182847B3/fr
Priority to JP48020277A priority patent/JPS4922542A/ja
Priority to DE2312433A priority patent/DE2312433A1/de
Application granted granted Critical
Publication of US3800263A publication Critical patent/US3800263A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • 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

Definitions

  • ABSTRACT A combined terminal and fuse holder arrangement utilized in an electrical circuit, such as an open coil heater assembly.
  • the terminal includes an insulator which supports a projecting arm having an aperture to receive a screw.
  • the end of a circuit element is formed in a loop to hook about the body of the screw, the screw holding the element in electrical connection with the arm.
  • the arm is bridged electrically through a fuse to a terminal contact which is also supported by the insulator.
  • the invention generally relates to an improved construction for servicing a fused electrical circuit, such as an open coil heater assembly.
  • fuses frequently require replacement.
  • the fuse is connected in the circuit such that the entire heater assembly must be removed from its operative position and the fuse replaced by breaking one or more mechanical connections, removing the defective fuse, attaching the new fuse in place, and relocating the entire assembly in its operative position.
  • Such steps are inconvenient and costly.
  • heater assemblies In an effort to avoid entire assembly removal, heater assemblies have been developed which utilize separate terminals for supporting the fuse and the heater coil. Besides being uneconomical, such arrangements suffer the further shortcoming of occupying considerable space on the base plate of the assembly and requiring a jumper from one terminal to the other. These factors are of substantial importance in multicoil assemblies which usually include control elements, such as relays and temperature responsive devices, the proper positioning of which is complicated by the presence of a considerable number of terminals. I
  • the invention relates to the latter type of system wherein the entire assembly need not be removed but wherein the number of terminals is reduced and replacement of defective parts is facilitated by combining the fuse supporting and coil end holding functions in a single terminal.
  • the terminal includes an insulator for supporting an arm which projects towards the heating coil.
  • the arm has an aperture for receiving a screw, and the end of the heating coil loops about the screw and is electrically connected to the arm when the screw is tightened.
  • a fuse electrically bridges the arm to a terminal contact which also is supported by the insulator.
  • FIG. 1 illustrates a conventional prior art arrangement for connecting a fuse and a coil in an open coil heating assembly, the arrangement being of the type in which the entire heating assembly need not be removed from its operative position in order to replace the fuse;
  • FIG. 2 is an elevational view of an open coil heating element assembly incorporating the present invention
  • FIG. 3 is an elevational view of the assembly taken at 90 to that view shown in FIG. 2;
  • FIG. 4 is a view in section of the insulator portion of the terminal taken along line 4-4 of FIG. 3.
  • FIG. I there is disclosed a known mannor of securing a fuse and a heater coil end in an open coil heater assembly.
  • a plate serves as a base for supporting a pair of terminals having insulators I2 and l4.
  • Insulator 12 is a two-piece construction held together by a screw 16 passing along the axes of the pieces and cooperating with a pair of nuts 18.
  • the heater coil 20 is soldered to the head of screw 16.
  • Insulator 14 is connected to the base plate by means of a screw 22 passing through an ear 24 projecting from the insulator.
  • a pair of contacts 26 and 28 are provided at one end of insulator l4, and arms 30 and 32 project from the opposite end. Contact 26 and arm 30 are in electrical connection as are contact 28 and arm 32.
  • a fuse 34 bridges arms 30 and 32, and the fuse is electrically joined to coil 20 by a jumper 36 joined between contact 28 and the screw 16.
  • the nuts 18 secure the 5 jumper in electrical contact with the screw.
  • FIGS. 24 there is illustrated the base plate 10 and support structure, generally indicated as 40, for the open coil heater 20.
  • the support structu e which is fully described in US. Pat. No. 3,641,312 granted on Feb. 8, 1972, forms no part of the present invention.
  • a single terminal is used to support a fuse 34 and the end of heater coil 20.
  • the terminal includes an insulator which is preferably ceramic formed with an exterior shoulder 44 (FIG. 4) which abuts the base plate 10 when the insulator is properly positioned to project through an aperture in the base plate.
  • the insulator includes an car 46 through which a screw 48 extends to secure the insulator 42 to the base plate.
  • the interior of the insulator 42 is provided with passages (FIG. 4) to receive electrically conductive elements.
  • One of these elements is an arm 50 which has a U-shaped cross-section; Arm 50 abuts an internal shoulder 52 formed within a first passage 54, and coextensive with arm 50 is a projection 56 having ears 58 which are bent to engage the outer surface of insulator 42 thereby maintaining arm 50 in fixed position with respect to the insulator.
  • a shorter arm 60 abuts shoulder 62 formed within a second passage 64.
  • Coextensive with arm 60 is a projection 66 which extends beyond the insulator 42 to serve as a contact 68. Again, arm 60 is held in fixed position by ears 70 which engage the outer surface of insulator 42.
  • a fuse 34 has its ends attached to arms 50 and 60.
  • the flat surface of the U-shaped arm 50 is provided with an aperture to receive a screw 72.
  • the end of coil 20 is bent in a loop 74 to be hooked about the body of screw 72 so that when the screw is tightened, an electrical circuit is assured from contact 68, through projection 66, arm 60, fuse 34 and arm 50 to the heater coil 20.
  • the end of loop 74 of the heater coil is arranged to extend beyond the end of arm 50.
  • the screw 48 is undone to permit the insulator 42 to be disconnected from base plate 10.
  • the insulator is then withdrawn from the base plate against the spring tension of coil 20.
  • the loop end is hooked on the surface of the base plate.
  • the screw 72 is then disconnected to separate the coil 20 from the insulator assembly. A new assembly can then be substituted and the coil attached thereto by means of screw 72.
  • the spring tension snaps the insulator into place against the base plate, where it is firmly affixed by screw 48.
  • the invention resides in a structural arrangement for a combination fuse holder and terminal for an electrical circuit employing a single element which is attached to a base plate.
  • the arrangement disclosed permits ease of replacement of components and occupies much less space than conventional replaceable fuse holder arrangements. While the embodiment shown is that used for a single coil, it should be appreciated that the insulator 42, which comprises a principal part of the terminal, may be formed with additional passages so as to permit termination of plural circuits in a manner such as that just described for a single circuit.
  • I an insulator element havinga pair of passages extending therethrough;
  • a first arm positioned within one of said passages and having an electrical contact extending beyond one side of the insulator element
  • said securing means for at least the second arm including fastening means integral with said arm and engaging a surface of the insulator element to hold said arm in fixed position within its passage with a portion of the arm abutting a shoulder defined by the passage internally of said element;
  • a combined terminal and holder for a thermal fuse adapted to project through an aperture of a supporting plate associated with said electrical circuit to removably locate said fuse adjacent to and in thermally operative relationship with a second arm joined to said insulator element and projecting beyond the opposite side of the element whereby said second arm is accessible from the opposite side of the plate;
  • thermal fuse being positioned on the opposite side of the element and connected between the projecting portion of the second arm and said first arm;
  • the combined terminal and fuse holder further comprising:
  • fastening means integral with said second arm and engaging a surface of the insulator element to join said arm to the element by holding said arm in fixed position within its associated passage with a portion of the arm abutting the internal shoulder.

Landscapes

  • Fuses (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
US00249791A 1972-05-03 1972-05-03 Combination terminal and fuse holder arrangement for an electrical circuit Expired - Lifetime US3800263A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US00249791A US3800263A (en) 1972-05-03 1972-05-03 Combination terminal and fuse holder arrangement for an electrical circuit
IT20339/73A IT979069B (it) 1972-05-03 1973-02-13 Combinazione di terminale e sup porto per fusibile per circuito elettrico
FR7305455A FR2182847B3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-05-03 1973-02-15
JP48020277A JPS4922542A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-05-03 1973-02-21
DE2312433A DE2312433A1 (de) 1972-05-03 1973-03-13 Klemmen- und sicherungshalter, insbesondere fuer elektrische heizgeraete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00249791A US3800263A (en) 1972-05-03 1972-05-03 Combination terminal and fuse holder arrangement for an electrical circuit

Publications (1)

Publication Number Publication Date
US3800263A true US3800263A (en) 1974-03-26

Family

ID=22945013

Family Applications (1)

Application Number Title Priority Date Filing Date
US00249791A Expired - Lifetime US3800263A (en) 1972-05-03 1972-05-03 Combination terminal and fuse holder arrangement for an electrical circuit

Country Status (5)

Country Link
US (1) US3800263A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS4922542A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2312433A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2182847B3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT979069B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3882438A (en) * 1974-04-05 1975-05-06 Pep Ind Inc Combination terminal and fuse holder arrangement for an electrical circuit
US6020577A (en) * 1998-01-19 2000-02-01 Industrial Engineering And Equipment Company Electric heating element support structures and method of making same
US20130162387A1 (en) * 2011-12-22 2013-06-27 Roy Kelley Thermal cutoff link safety fuse in hvac system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2589026B1 (fr) * 1985-10-21 1987-12-11 Matherm Dispositif de raccordement electrique pour resistances realisees sous la forme d'un ruban metallique ondule
JPH07115403B2 (ja) * 1990-02-16 1995-12-13 富士写真フイルム株式会社 熱可塑性樹脂フィルムの冷却方法および装置
SI3307536T1 (sl) * 2015-06-11 2021-09-30 Colines S.P.A. Sendvič plošča ali panel v obliki satja na osnovi polipropilena z osrednjo termooblikovano folijo

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR743205A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1933-03-25
US2211520A (en) * 1937-12-31 1940-08-13 John E Smith Electrical heating unit
US2458511A (en) * 1945-06-06 1949-01-11 Gen Electric Combined switch stud and fuse clip

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR743205A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1933-03-25
US2211520A (en) * 1937-12-31 1940-08-13 John E Smith Electrical heating unit
US2458511A (en) * 1945-06-06 1949-01-11 Gen Electric Combined switch stud and fuse clip

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3882438A (en) * 1974-04-05 1975-05-06 Pep Ind Inc Combination terminal and fuse holder arrangement for an electrical circuit
US6020577A (en) * 1998-01-19 2000-02-01 Industrial Engineering And Equipment Company Electric heating element support structures and method of making same
US20130162387A1 (en) * 2011-12-22 2013-06-27 Roy Kelley Thermal cutoff link safety fuse in hvac system

Also Published As

Publication number Publication date
FR2182847B3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1976-02-13
IT979069B (it) 1974-09-30
JPS4922542A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-02-28
FR2182847A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-12-14
DE2312433A1 (de) 1973-11-15

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