US3361884A - Printed circuit fuses - Google Patents

Printed circuit fuses Download PDF

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Publication number
US3361884A
US3361884A US619340A US61934067A US3361884A US 3361884 A US3361884 A US 3361884A US 619340 A US619340 A US 619340A US 61934067 A US61934067 A US 61934067A US 3361884 A US3361884 A US 3361884A
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United States
Prior art keywords
fuse
printed circuit
board
neck
strip
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
US619340A
Inventor
Parkes Eric Bernard
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
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Filing date
Publication date
Application filed by Lucas Industries Ltd filed Critical Lucas Industries Ltd
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Publication of US3361884A publication Critical patent/US3361884A/en
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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
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/046—Fuses formed as printed circuits

Definitions

  • a printed circuit fuse has an insulating board With a pair of spaced conductive terminal portions thereon interconnected by a fuse portion.
  • the board is shaped so that the fuse portion is supported on a thin neck of insulating material of substantially the same length and breadth as the fuse portion itself, this arrangement minimising distortion by the heat generated in the fuse portion.
  • This invention relates to fuses.
  • a fuse according to the invention comprises an insulating board having thereon a layer of conductive material shaped to define a pair of spaced terminal portions interconnected by a fuse portion, the board being so shaped that the fuse portion is supported on a neck of insulating material of substantially the same length and breadth as the fuse portion itself.
  • FIGURE 1 is a plan view of a fuse construction in accordance with a first example of the invention and FIGURE 2 is a view similar to FIGURE 1 illustrating a second example of the invention.
  • FIGURE 1 there is provided an insulating board 11 having printed on one or both faces thereof a layer 12 of conductive material.
  • the layer 12 is shaped to define a pair of spaced terminal portions 13, 14 interconnected by a narrow fuse portion 15.
  • the board 11 is formed with a pair of generally semi-circular holes 16, the straight edges of which are adjacent opposite sides of the portion 15, the arrangement being such that the portion 15 is supported on a neck 17 of insulating material of substantially the same length and breadth as 3,361,884 Patented Jan. 2, 1968 the portion 15 itself.
  • the narrow fuse portion 15 and the neck 17 are collectively called the fuse strip.
  • the layer in this example is printed with the fuse portion 15 adjacent one edge of the board 11 and therefore only one hole 16 is required to isolate a neck 17 of insulating material and form the fuse strip.
  • a fuse comprising an insulating board having on at least one side thereof two terminal legs of conductive material interconnected by at least one narrow fuse strip which consists of a continuous underlying neck of said board and a continuous overlying portion of fusible material, said insulating board having at least one hole adjacent to and defining the shape of one side of said strip, and said neck and fusible material portion being coextensive over the entire length of said strip so as to minimise the distortion in said board.
  • a fuse as claimed in claim 1 wherein there are two holes in the insulating board adjacent to and defining each side of the narrow fuse strip.

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  • Fuses (AREA)

Description

Jan. 2, 1968 E. B. PARKES 3,361,884
PRINTED CIRCUIT FUSES Filed Feb. 28, 1967 FIG. 3.
United States Patent 3,361,884 PRINTED CIRCUIT FUSES Eric Bernard Parkes, Selly Oak, Birmingham, England,
assignor to Joseph Lucas (Industries) Limited, Birmingham, England, a British company Filed Feb. 28, 1967, Ser. No. 619,340 Claims priority, application Great Britain, May 20, 1966, 22,546/ 66 4 Claims. (Cl. 200-135) ABSTRACT OF THE DISCLOSURE A printed circuit fuse has an insulating board With a pair of spaced conductive terminal portions thereon interconnected by a fuse portion. The board is shaped so that the fuse portion is supported on a thin neck of insulating material of substantially the same length and breadth as the fuse portion itself, this arrangement minimising distortion by the heat generated in the fuse portion.
This invention relates to fuses.
A fuse according to the invention comprises an insulating board having thereon a layer of conductive material shaped to define a pair of spaced terminal portions interconnected by a fuse portion, the board being so shaped that the fuse portion is supported on a neck of insulating material of substantially the same length and breadth as the fuse portion itself.
In the accompanying drawings FIGURE 1 is a plan view of a fuse construction in accordance with a first example of the invention and FIGURE 2 is a view similar to FIGURE 1 illustrating a second example of the invention.
Referring first to FIGURE 1 there is provided an insulating board 11 having printed on one or both faces thereof a layer 12 of conductive material. The layer 12 is shaped to define a pair of spaced terminal portions 13, 14 interconnected by a narrow fuse portion 15. The board 11 is formed with a pair of generally semi-circular holes 16, the straight edges of which are adjacent opposite sides of the portion 15, the arrangement being such that the portion 15 is supported on a neck 17 of insulating material of substantially the same length and breadth as 3,361,884 Patented Jan. 2, 1968 the portion 15 itself. The narrow fuse portion 15 and the neck 17 are collectively called the fuse strip.
Referring now to FIGURE 2, the layer in this example is printed with the fuse portion 15 adjacent one edge of the board 11 and therefore only one hole 16 is required to isolate a neck 17 of insulating material and form the fuse strip.
It is found that heat generated in the fuse portion 15 causes distortion of the insulating material, such distortion imposes unwanted mechanical stresses on the fuse portion 15 and the construction specified above tend to minimise the distortion.
Having thus described my invention what I claim as new and desire to secure by Letters Patent is:
1. A fuse comprising an insulating board having on at least one side thereof two terminal legs of conductive material interconnected by at least one narrow fuse strip which consists of a continuous underlying neck of said board and a continuous overlying portion of fusible material, said insulating board having at least one hole adjacent to and defining the shape of one side of said strip, and said neck and fusible material portion being coextensive over the entire length of said strip so as to minimise the distortion in said board.
2. A fuse as claimed in claim 1 wherein the conductive material is on both sides of the insulating board.
3. A fuse as claimed in claim 1 wherein there are two holes in the insulating board adjacent to and defining each side of the narrow fuse strip.
4. A fuse as claimed in claim 1 wherein the hole is semi-circular in shape with the diameter adjacent the narrow fuse strip.
References Cited UNITED STATES PATENTS 3 07, 63 7 BERNARD A. GILHEANY, Primary Examiner. H. B. GILSON, Assistant Examiner.
US619340A 1966-05-20 1967-02-28 Printed circuit fuses Expired - Lifetime US3361884A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22546/66A GB1111075A (en) 1966-05-20 1966-05-20 Fuses

Publications (1)

Publication Number Publication Date
US3361884A true US3361884A (en) 1968-01-02

Family

ID=10181160

Family Applications (1)

Application Number Title Priority Date Filing Date
US619340A Expired - Lifetime US3361884A (en) 1966-05-20 1967-02-28 Printed circuit fuses

Country Status (4)

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US (1) US3361884A (en)
DE (1) DE1588427B2 (en)
FR (1) FR1517645A (en)
GB (1) GB1111075A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3500463A (en) * 1968-09-06 1970-03-10 Essex International Inc Fuse construction of non-conductive material with fusible coating
US3500462A (en) * 1967-07-26 1970-03-10 Essex International Inc Fuse construction
US3648115A (en) * 1969-10-17 1972-03-07 Amp Inc Fuse unit having slidable fuse-receiving drawer
US4376927A (en) * 1978-12-18 1983-03-15 Mcgalliard James D Printed circuit fuse assembly
US6617953B2 (en) 2001-03-26 2003-09-09 Wilson Greatbatch Ltd. Link fuse
US6618273B2 (en) 2001-03-27 2003-09-09 Wilson Greatbatch Ltd. Trace fuse
WO2006075242A1 (en) * 2005-01-14 2006-07-20 Vishay Israel Ltd. Fuse for an electronic circuit and method for producing the fuse

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU518330B2 (en) * 1977-07-07 1981-09-24 Amp Incorporated Fuse
KR910002070B1 (en) * 1982-07-07 1991-04-01 유끼노부 와다나베 Electric fuse

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US307637A (en) * 1884-11-04 Feed-rack
GB499816A (en) * 1937-07-26 1939-01-26 Allen West & Co Ltd Improvements in or relating to electric circuit interrupters
US2864917A (en) * 1954-12-23 1958-12-16 Edward V Sundt Short-time delay fuse
US2934627A (en) * 1957-04-09 1960-04-26 Northrop Corp Electric printed circuit component
US3206579A (en) * 1961-02-27 1965-09-14 Fed Pacific Electric Co Fuse and method of manufacture

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US307637A (en) * 1884-11-04 Feed-rack
GB499816A (en) * 1937-07-26 1939-01-26 Allen West & Co Ltd Improvements in or relating to electric circuit interrupters
US2864917A (en) * 1954-12-23 1958-12-16 Edward V Sundt Short-time delay fuse
US2934627A (en) * 1957-04-09 1960-04-26 Northrop Corp Electric printed circuit component
US3206579A (en) * 1961-02-27 1965-09-14 Fed Pacific Electric Co Fuse and method of manufacture

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3500462A (en) * 1967-07-26 1970-03-10 Essex International Inc Fuse construction
US3500463A (en) * 1968-09-06 1970-03-10 Essex International Inc Fuse construction of non-conductive material with fusible coating
US3648115A (en) * 1969-10-17 1972-03-07 Amp Inc Fuse unit having slidable fuse-receiving drawer
US4376927A (en) * 1978-12-18 1983-03-15 Mcgalliard James D Printed circuit fuse assembly
US6617953B2 (en) 2001-03-26 2003-09-09 Wilson Greatbatch Ltd. Link fuse
US6618273B2 (en) 2001-03-27 2003-09-09 Wilson Greatbatch Ltd. Trace fuse
WO2006075242A1 (en) * 2005-01-14 2006-07-20 Vishay Israel Ltd. Fuse for an electronic circuit and method for producing the fuse

Also Published As

Publication number Publication date
DE1588427A1 (en) 1971-04-08
FR1517645A (en) 1968-03-15
DE1588427B2 (en) 1971-11-25
GB1111075A (en) 1968-04-24

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