Fusible link for cable assembly and method of manufacturing same

Information

  • Patent Grant
  • 6359227
  • Patent Number
    6,359,227
  • Date Filed
    Tuesday, March 7, 2000
    24 years ago
  • Date Issued
    Tuesday, March 19, 2002
    22 years ago
Abstract
A fusible link for a cable assembly is provided. The fusible link has a link segment having a first member extending transversely from the link segment, and a second member extending transversely from the link segment. A first end of the link segment engaging a first cable of the cable assembly, and a second end of the link segment engaging a second cable of the cable assembly. A method of manufacturing the fusible link is also provided.
Description




TECHNICAL FIELD




The invention relates to the field of electrical protection, and is particularly directed to a fusible link for protecting electrical devices.




BACKGROUND OF THE INVENTION




Automobiles are increasingly reliant on electronic controls and engine management systems. As a result of these controls and systems, modern automobiles are much more dependable than prior autos, which instead used more vulnerable mechanical systems. Although the hardware embodying the electronic controls and systems is rather dependable, the failure of the means for directly or indirectly bringing electrical current to such hardware continues to be a rare but, nevertheless, significant source of automotive breakdowns. An automotive breakdown, especially in a deserted area or on a very busy high-speed road, is obviously a safety hazard to the automobile and its passengers.




One specific type of failure in prior art means can lead to an even more hazardous condition than automotive breakdown. The failure results when the junctions between the fusible link and the cables loosen, causing a high resistance between the fusible link and cable. The increased resistance leads to high temperatures in these regions. One cause of the failure at the connection of the fusible link and the cable is due to the flexibility of the fusible link. If the fusible link is not sufficiently rigid it may twist and bend during use of the cable assembly, thereby causing the connection between the fusible link and the cable to fail. Under certain conditions the increased temperatures can reach sufficiently high levels to split the insulation on the conventional copper-wire fusible links, initiating an engine compartment fire that can quickly destroy the automobile and endanger its occupants.




U.S. Pat. No. 5,591,366 issued to Schmidt et al. discloses a series of protective coverings over a heating wire connected to a power wire. The heating wire is connected in series to an electrical pin which directly joined to a fuse wire. The fuse wire is then joined to the power wire. Two opposing metal caps are bonded on their inner surfaces to a ceramic tube to form a hermetically sealed shell surrounding the junctions between the fuse wire and pin, and between the fuse wire and power wire. Then, a heat shrinkable tubing is used to grip the caps and ceramic tubing, encasing the fuse area.




Like other prior art devices, the disclosure of U.S. Pat. No. 5,591,366 does not solve the problem of protecting failure at the junctions of the fusible link.




Accordingly, a fusible link for a cable assembly in accordance with the present invention eliminates the drawbacks of the prior art devices described above.




SUMMARY OF THE INVENTION




According to one aspect of the present invention, a fusible link is provided for a cable assembly. The fusible link has a link segment having a first member extending transversely from the link segment, and a second member extending transversely from the link segment. The link segment is adapted to be electrically connected to first and second cables of the cable assembly.




According to another aspect of the present invention, the link segment has a first end and a second end, a first surface and a second surface, and a first side and a second side. The first end of the link segment is adapted to engage the first cable of the cable assembly and the second end of the link segment is adapted to engage the second cable of the cable assembly to electrically connect the fusible link with the first and second cables. The first member extends from the first side of the link segment and the second member extends from the second side of the link segment. The first and second members are transverse to the link segment.




According to another aspect of the present invention, the first member extends in a first direction transverse from the link segment, and the second member extends in a second direction from the link segment. In one embodiment, the second direction is substantially the same direction as the first direction. In another embodiment the second direction is substantially the opposite as the first direction.




According to another aspect of the present invention, the link segment is substantially planar and a plurality of apertures extend through the link segment. The fusible link may be made of a first conductive material that is the same as the conductive material as the first and second cables, and a second conductive material having a lower melting temperature than the first conductive material may be deposited on the link segment.




According to another aspect of the present invention, a method of manufacturing the fusible link is provided. The method includes providing a strip of conductive material having a first surface and a second surface. An aperture is created in the conductive material. The aperture extends from the first surface of the conductive material to the second surface of the conductive material. Additionally, transverse members are created on the fusible link.




According to another aspect of the present invention, the step of creating the transverse members comprises bending a first side of the strip of conductive material at an angle to the first surface to create a first transverse member, and bending the second side of the conductive material at an angle to the first surface to create a second transverse member.




According to another aspect of the present invention, a method of manufacturing a plurality of fusible links is provided. The method includes dicing the strip of conductive material into individual fusible links prior to creating the transverse members.




According to yet another aspect of the present invention, an additional step is provided including adding a second conductive material having a lower melting temperature than the first conductive material on one of the first and second surfaces of the fusible link. The second conductive material is added adjacent the aperture in the conductive material.




Other features and advantages of the invention will be apparent from the following specification taken in conjunction with the following drawings.











BRIEF DESCRIPTION OF THE DRAWINGS




To understand the present invention, it will now be described by way of example, with reference the accompanying drawings in which:





FIG. 1

is an exploded perspective view of the cable assembly, including a protective housing andthe fusible link of the present invention;





FIG. 2

is a top plan view of a strip of conductive material utilized to create a plurality of fusible links of the present invention;





FIG. 3

is a top plan view of one fusible link of the present invention;





FIG. 4

is a top plan view of the fusible link of

FIG. 1

;





FIG. 5

is a side elevation view of the fusible link of

FIG. 4

;





FIG. 6

is a top plan view of another embodiment of the fusible link; and,





FIG. 7

is a side elevation view of the fusible link of FIG.


6


.











DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT




While this invention is susceptible of embodiments in many different forms, there is shown in the drawings and will herein be described in detail preferred embodiments of the invention with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the broad aspect of the invention to the embodiments illustrated.




Referring now in detail to the Figures, and initially to

FIG. 1

, there is shown a preferred embodiment of the fusible link


16


of the present invention. The fusible link


16


is generally utilized with a cable assembly


10


, including a first cable


12


and a second cable


14


connected to ends of the fusible link


16


, and a protective housing


18


encasing the fusible link


16


. The present fusible link


16


is an improvement over prior art fusible links in that it provides a rigid member to electrically connect the first and second cables


12


,


14


. Thus, the present invention offers stability and safety features previously not available with prior fusible links.




As shown in

FIG. 1

, the first and second cables


12


,


14


are conventional insulated electrical cables and are generally comprised of a core of a plurality of elongated strands of wires


20


surrounded by a protective insulation layer


22


, such as polyethylene. Nonetheless, a solid wire or cable could be employed as the core for the present invention in lieu of a stranded cable. The cable core


20


is made of a first material, preferably a conductive metal, and more preferably copper. Each of the cables


12


,


14


generally have a first or proximal end


24


, and a second or distal end


26


. A portion of the protective covering


22


or insulation adjacent the first or proximal end


24


of each cable is removed or stripped away from the cable. Preferably, approximately a ½″ portion of insulating covering


22


is removed from the first end


24


of the cable. Thus, the end portion of the cables or wires extends past their respective protective coverings


22


.




In the preferred embodiment of the present invention the first cable


12


is made of 6 gauge wire. The first cable


12


may have a terminal


28


at the second or distal end


26


of the cable for connecting the cable to a power source (not shown). The second cable


14


is similarly made of a 6 gauge wire. The second cable


14


may have a terminal


28


at the second or distal end


26


of the cable for connecting to a desired electrical device (not shown) such as the starter of an automobile. Even though a 6 gauge wire is utilized in the preferred embodiment, much larger and much smaller gauge wires, for example, from 10 gauge up to at least 2 gauge or larger, may be used as either the first cable, the second cable, or both the first and second cables. Furthermore, it is understood that the gauge thickness of the first cable could be different from the gauge thickness of the second cable.




The fusible link of the preferred embodiment is illustrated in

FIGS. 1

, and


4


-


7


. The fusible link


16


is adapted to be electrically connected to the first and second cables


12


,


14


of the cable assembly. The fusible link


16


comprises a link segment


17


having a first end


30


and a second end


32


, a first surface


36


and a second surface


38


, and a first side


39


and a second side


41


. Generally, the link segment


17


is substantially planar. The first end


30


of the link segment


17


is adapted to engage the first cable


12


, and the second end


32


of the link segment


17


is adapted to engage the second cable


14


. Further, first and second members


40


,


42


extend from the link segment. In the preferred embodiments of the present invention, the first member


40


extends from the first side


39


of the link segment


17


, and the second member


42


extends from the second side


41


of the link segment


17


. The first and second members


40


,


42


are transverse to the link segment


17


. The transverse members


40


,


42


of the fusible link


16


provide superior bending strength and rigidity for the fusible link


16


.




One preferred embodiment of the fusible link of the present invention is illustrated in

FIGS. 4 and 5

. In this embodiment the first transverse member


40


extends in a first direction transverse from the link segment


17


, and the second transverse member


42


extends in a second direction which is substantially the same direction as the first member


40


. The first member


40


and the second member


42


extend from or are adjacent one of the surfaces


36


,


38


of the link segment. As shown in

FIG. 4

, the first member


40


extends from the first surface


36


adjacent the first side


39


thereof, and the second member


42


extends from the first surface


36


adjacent the second side


41


thereof. Thus, both the first and second members


40


,


42


extend away from the link segment


17


in the same direction (away from and adjacent to the first surface), and the fusible link


16


of this embodiment is approximately U-shaped. As shown in

FIG. 5

, the first and second members


40


,


42


are substantially perpendicular to the link segment


17


. The transverse members


40


,


42


, however, need not be at exact right angles (i.e., at 90°) to the link segment


17


, and are generally within ±30° of 90°.




The improved rigidity in the fusible link


16


is provided from the transverse portion of a member adjacent the link segment


17


of the fusible link


16


. Accordingly, any angle that the first and second members


40


,


42


depend from the link segment


17


provides improved rigidity. Preferably, the first and second members


40


,


42


extend at least at a 30° angle to the link segment


17


. More preferably, the first and second members


40


,


42


extend at least at a 45° angle to the link segment


17


. Most preferably, the first and second members


40


,


42


extend at an angle between 45° and 90° to the link segment


17


.




Another preferred embodiment of the fusible link of the present invention is illustrated in

FIGS. 6 and 7

. In this embodiment the first transverse member


40


extends in a first direction transverse from the link segment


17


, and the second transverse member


42


extends in a second direction which is substantially the opposite direction as the first member


40


. Thus, the first member


40


, the link segment


17


, and the second member


42


form the shape of an “S” or “Z.” As shown in

FIG. 7

, the first member


40


extends from or adjacent the first surface


36


of the link segment


17


adjacent the first side


39


thereof, and the second member


42


extends from or adjacent the second surface


38


of the link segment


17


adjacent the second side


41


thereof. Like the embodiment illustrated in

FIGS. 4 and 5

, the first and second members


40


,


42


are substantially perpendicular to the link segment


17


. Also like the above embodiment, the transverse members


40


,


42


need not be at exact right angles (i.e., at 90°) to the link segment


17


, but are generally within ±30° of 90°.




The fusible link


16


is generally a 0.032 inch thick piece of conductive material, preferably copper or a copper alloy. In the preferred embodiment, the fusible link


16


is made of the same conductive metal, i.e. copper, as the first and second cables


12


,


14


. Notwithstanding the above, the fusible link


16


can be made of any suitable conductive metal which can form a fuse element that, when properly configured, melts to open the circuit under both short circuit conditions and under prolonged modest overload conditions.




Further, in both of the above-described preferred embodiments, a plurality of apertures or cutouts


44


extend through the link segment


17


of the fusible link


16


. The apertures


44


create regions of high electrical resistance. Additionally, a second conductive material


48


having a lower melting temperature than the material of the fusible link


16


may be distributed on the fusible link


16


adjacent the apertures


44


to lower the melting temperature of the fusible link. Preferably a tin or tin/lead spot


48


is distributed on the upper or first surface


36


of the fusible link


16


for such purposes.




The fusible link


16


is manufactured by conventional stamping and bending techniques. The method of manufacturing the fusible links


16


described above generally begins with providing a substantially planar strip of conductive material


19


having a first surface


36


and a second surface


38


. Next, the apertures


44


are created in the strip of conductive material as shown in FIG.


3


. The apertures


44


extend through the strip from the first surface


36


thereof, to the second surface


38


thereof. The apertures


44


may be created by any method, including stamping, punching, and with the use of lasers and chemicals.




The next step includes creating members


40


,


42


transverse to the first and second surface


36


,


38


of the link segment


17


. Generally, this is accomplished by bending a portion of the conductive material adjacent the first and second sides


39


,


41


of the link segment


17


. In the preferred embodiments, a portion of the material at the first side


39


of the strip of conductive material is bent at an angle to the first surface


36


to create the first transverse member


40


, and a portion of the material at the second side


41


of the strip of conductive material is bent at an angle to the first surface


36


to create the second transverse member


42


. The angle may be positive or negative, as shown in FIG.


7


. In the embodiment of

FIG. 7

, the first transverse member


40


extends roughly 90° from the first surface


39


, while the second transverse member


42


extends roughly −90° from the first surface


39


.




Additionally, as shown in both

FIGS. 4 and 6

, the first and second transverse members


40


,


42


extend in a direction from the first end


39


of the fusible link to the second end


41


of the fusible link. Notwithstanding the preferred embodiment which includes bent sides, the transverse members


40


,


42


may be additional material connected to the link segment


17


of the fusible link


16


. Further, the transverse members


40


,


42


may extend the entire length from the first end


30


of the fusible link


16


to the second end


32


of the fusible link


16


as shown in

FIG. 4

, or the transverse members


40


,


42


may extend along a portion of the sides


39


,


41


of the fusible link


16


as illustrated in FIG.


6


. As shown in

FIG. 1

, if the transverse members


40


,


42


extend the entire length from the first end


30


to the second end


32


of the fusible link


16


, they provide additional retaining means for the cables


12


,


14


.




As shown in

FIG. 2

, the method of manufacturing the fusible links


16


allows for manufacturing a plurality of links simultaneously. As such, a strip of conductive material is provided


19


. The strip is much longer than a single fusible link


16


. The process commences as if a single fusible link


16


were being manufactured. As such, a plurality of apertures


44


are created in the strip of material


19


. The apertures


44


are located in appropriate clusters for each resulting fusible link. After the strip


19


has the appropriate apertures therein, the strip is diced into individual link segments


17


. The strip may be diced lengthwise or widthwise, depending on the configuration of the fusible link. Each diced link segment


17


from the long strip


19


shown in

FIG. 2

becomes an individual link segment


17


as shown in FIG.


3


. Once the link segments


17


are diced, the transverse members


40


,


42


are created as described above.




Additionally, a second conductive material


48


may be placed on one of the first and second surfaces


36


,


38


of the fusible link. As shown in

FIG. 1

, the second conductive material


48


is preferably located adjacent one of the apertures


44


.




The first end portion


24


of each of the first and second cables


12


,


14


is electrically connected to the fusible link


16


adjacent the opposing first and second ends


30


,


32


of the fusible link, respectively. The first end portion


24


of the first cable


12


is electrically connected to the fusible link


16


adjacent the first end


30


of the fusible link, thereby creating a first connection point. Similarly, the first end portion


24


of the second cable


14


is electrically connected to the fusible link


16


adjacent the second end


32


of the fusible link, thereby creating a second connection point. As such, the fusible link


16


is located between and electrically connects the first and second cables


12


,


14


. The means for electrically connecting the cables


12


,


14


to the fusible link


16


is preferably accomplished by brazing the cable to the fusible link. Other means, including compressing, welding, soldering and sonic welding, can be employed as well. As shown in

FIG. 1

, the first cable


12


and the second cable


14


are preferably connected to the top surface of the fusible link


16


, and between the transverse sides


40


,


42


thereof.




As shown in

FIG. 1

, the protective housing


18


comprises a pair of housing members. Preferably, the pair includes a first housing member


60


and a second housing member


62


. Each housing member


60


,


62


is generally made of a heat resistant plastic material. The protective housing


18


itself, as well as the first and second housing members


60


,


62


of the protective housing, each have a first end portion


72


, a second end portion


74


, and an intermediate section


76


therebetween. The first end portion


72


of each housing member has a first cavity


78


, the second end portion


74


of each housing member has a second cavity


80


, and the intermediate section


76


of each housing member has an intermediate cavity


82


. The intermediate cavity


82


of the first and second housing members has a greater volume than that of the first and second cavities


78


,


80


of the first and second housing members. The protective housing


18


securably engages the first and second cables


12


,


14


, to prevent both axial and rotational movement of the cables


12


,


14


. As such, a much more rigid assembly is provided to prevent loosening or breaking of the connection between the first and second cables


12


,


14


or wires and the fusible link


16


. Additionally, features of the housing


18


provide for increased protection for the components within the housing


18


from outside elements.




The first and second housing members


60


,


62


each have a shoulder


68


and groove


70


therein. One shoulder


68


is adjacent a side of each of the first and second housing members


60


,


62


. Similarly, one groove


70


is adjacent the opposing side of each of the first and second housing members


60


,


62


. The shoulder


68


that extends from the first housing member


60


mates with the groove


70


in the second housing member


62


when the first and second housing members


60


,


62


are coupled, and the shoulder


68


that extends from the second housing member


62


mates with the groove


70


in the first housing member


60


when the first and second housing members


60


,


62


are coupled. The grooves


70


and shoulders


68


not only operate as a locating means for the first and second housing members during coupling thereof, but the mated shoulders


68


and grooves


70


also provide a seal area about the sides of the protective housing


18


.




The first and second housing members


60


,


62


also have interconnecting members


64


,


66


which mate to assist in locating the first and second housing members


60


,


62


together for coupling thereof The interconnecting members comprise a post


64


and a mating aperture


66


. Each housing member


60


,


62


has a post


64


at the first and second end portions


72


,


74


of each respective housing member


60


,


62


. The posts are adjacent one of the sides of the respective housing member


60


,


62


. Additionally, each housing member


60


,


62


has an aperture


66


at the first and second end portions


72


,


74


of each respective housing member


60


,


62


. The apertures


66


are adjacent the opposing side of the respective housing member


60


,


62


as that of the posts


64


. Accordingly, the post


64


at the first end portion


72


of the first housing member


60


mates with the aperture


66


at the first end portion


72


of the second housing member


62


, the post


64


at the second end portion


74


of the first housing member


60


mates with the aperture


66


at the second end portion


74


of the second housing member


62


, the post


64


at the first end portion


72


of the second housing member


62


mates with the aperture


66


at the first end portion


72


of the first housing member


60


, and the post


64


at the second end portion


74


of the second housing member


62


mates with the aperture


66


at the second end portion


74


of the first housing member


60


. When coupled, the protective housing


18


covers the fusible link


16


and portions of the first and second cables


12


,


14


.




As shown in

FIG. 1

, when the first and second housing members


60


,


62


are coupled together to form the overall protective housing


18


, the protective housing


18


can be said to have a first channel portion


84


at a first end


72


thereof which houses a portion of the first cable


12


; a second channel portion


86


at the second end


74


thereof which houses a portion of the second cable


14


; and, an intermediate channel portion


88


between and connecting the first channel


84


and the second channel


86


which houses the fusible link


16


. The first channel portion


84


is comprised of the first cavity


78


of the first and second housing members


60


,


62


, the second channel portion


86


is comprised of the second cavity


80


of the first and second housing members


60


,


62


, and the intermediate channel portion


88


of the protective housing


18


is comprised of the intermediate cavities


82


of the first and second housing members


60


,


62


. The individual channel portion


84


,


86


,


88


cooperate to form a continuous channel extending from the first end


72


of the protective housing


18


to the second end


74


of the protective housing


18


. The intermediate channel


88


houses the fusible link


16


. A portion of the intermediate channel


88


is spaced a distance away from the fusible link


16


to create a gap between the fusible link


16


and an interior wall of the intermediate channel


88


.




The protective housing


18


further has a plurality of ribs


90


,


91


extending into the channel. As shown in

FIG. 1

, in the preferred embodiment, two first ribs


90


and two second ribs


91


extend from the protective housing


18


and into the channel at the first end portion


72


of the protective housing


18


, and two first ribs


90


and two second ribs


91


extend from the protective housing


18


and into the channel at the second end portion


74


of the protective housing. More specifically, in the preferred embodiment a first rib


90


extends from the first housing member


60


, at both the first and second end portions


72


,


74


thereof, and into the channel; and, a second rib


91


extends from the first housing member


60


, at both the first and second end portions


72


,


74


thereof, and into the channel. Similarly, a first rib


90


extends from the second housing member


62


, at both the first and second end portions


72


,


74


thereof, and into the channel; and, a second rib


91


extends from the second housing member


60


, at both the first and second end portions


72


,


74


thereof, and into the channel.




The first and second housing members


60


,


62


have a longitudinal axis (L) which generally extends from the first end


72


of the respective housing member to the second end


74


of the respective housing member. The first ribs


90


of the first and second housing members


60


,


62


generally extend about a portion of the longitudinal axis (L) of the respective housing member


60


,


62


. Accordingly, when the first and second housing members


60


,


62


are coupled to form the protective housing


18


, the first ribs


90


extend axially from the protective housing


18


. The second ribs


91


are transverse to the first ribs


90


, and conversely, the first ribs


90


are transverse to the second ribs


91


. In the preferred embodiment, the second ribs


91


extend substantially perpendicular to the first ribs


90


. As such, in the preferred embodiment the second ribs


91


do not have to be at exact right angles to the first ribs


90


.




Moreover, in the preferred embodiment the first housing member


60


and the second housing member


62


are identical components. Even though the protective housing


18


has been described as having a first housing member


60


and a second housing member


62


, the protective housing


18


can be comprised of either two first housing members


60


, or two second housing members


62


, that is a pair of housing members. To mate the housing members, one housing member is rotated


180


degrees to allow the mating grooves/shoulders and posts/apertures to correspond.




The first and second ribs


90


,


91


at the first end portion


72


of the first and second housing members


60


,


62


contacts the protective covering


22


of the first cable


12


to grip and contain the first cable


12


at the first end portion


72


, and the first and second ribs


90


,


91


at the second end portion


74


of the first and second housing members


60


,


62


contacts the protective covering


22


of the second cable


14


to grip and contain the second cable. Generally, the ribs


90


,


91


comprise a protrusion extending from the housing member. In the preferred embodiment, the ribs


90


,


91


have an apex for securely engaging the cable. Further, in the preferred embodiment the ribs


90


,


91


at the first end portion


72


extend from an interior wall of the first channel and the ribs


90


,


91


at the second end portion


74


extend from an interior wall of the second channel. When the two housing members


60


,


62


of the protective housing


18


are mated and firmly connected together, portions of the ribs


90


,


91


are indented into the insulative layer


22


of the cable. This allows the engaging ribs


90


,


91


to securely grip and contain the cable


12


,


14


such that the cable is not capable of movement with respect to the protective housing


18


. Specifically, the first ribs


90


which extend about a portion of the longitudinal axis (L) of the protective housing


18


prevent rotational movement of the cables


12


,


14


with respect to the protective housing


18


. And, the second ribs


91


which extend transversely to the first ribs


90


prevent axial movement of the cables (i.e., movement of the cables into and out of the protective housing). By having ribs that are transverse to other ribs, whether the transverse ribs are perpendicular to the axial ribs or not, any type of movement of the cable with respect to the protective housing is substantially eliminated. Preventing movement of the cable with respect to the protective housing assists in ensuring that the cable assembly will not fail at the connection points of the cables and the fusible links. Additionally, having transverse members


40


,


42


depending from the fusible link


16


further assists in prevent failure of the connection points. As such, the first cable


12


, the protective housing


18


, the fusible link


16


, and the second cable


14


form a unitary element when the protective housing


18


is secured around the cable assembly.




The inside diameter of the first and second cavities


78


,


80


, and thus of the formed channels


84


,


86


can be varied to accommodate different size cables. Additionally, the height of the ribs


90


,


91


may vary accordingly with the variation in the cavity diameter. For a 6 gauge cable the cavity diameter is approximately 0.266″ and the height of the ribs are 0.032″. For an 8 gauge cable the cavity diameter is approximately 0.182″ and the height of the ribs are 0.032″. For a 4 gauge cable the cavity diameter is approximately 0.310″ and the height of the ribs are 0.032″. Even though the cavity diameter and rib height can be varied, a small change in the size of the cable does not necessarily require a change in the cavity diameter of the housing. The parameters of the cavity


84


,


86


and ribs


90


,


91


are such that a certain size cavity can accommodate small increases and decreases in the diameter of the cable


12


,


14


.




Once the first and second housing members


60


,


62


are mated around and over the fusible link


16


and portions of the first and second cables


12


,


14


, the first and second housing members


60


,


62


are fixedly connected with rivets


93


which extend through apertures


94


in the housing members


60


,


62


. In the preferred embodiment apertures


94


for rivet


93


are located adjacent each of the four corners of the protective housing


18


. It should be known however, that the first and second housing members


60


,


62


could be fixedly connected by any other means, including adhesives, welding, or any other connecting means. By fixedly connecting the first and second housing members


60


,


62


together, the ribs


90


,


91


are maintained securely in the protective covering


22


of the cables


12


,


14


to maintain the cables in place. As such, the cable


12


,


14


and fusible link


16


are securely connected to the housing


18


.




While the specific embodiments have been illustrated and described, numerous modifications come to mind without significantly departing from the spirit of the invention, and the scope of protection is only limited by the scope of the accompanying Claims.



Claims
  • 1. A fusible link for a cable assembly comprising:a link segment having a first end and a second end, a first surface and a second surface, and a first side and a second side, wherein a first member extends from the first side of the link segment and a second member extends from the second side of the link segment, the first and second members being substantially planar and further being transverse to the link segment, and wherein the first end of the link segment is adapted to engage a first cable of the cable assembly and the second end of the link segment is adapted to engage a second cable of the cable assembly.
  • 2. The fusible link of claim 1, wherein the first member extends in a first direction transverse from the link segment, and wherein the second member extends in substantially the same direction as the first member.
  • 3. The fusible link of claim 1, wherein the first member extends in a first direction transverse from the link segment, and wherein the second member extends in substantially an opposite direction as the first member.
  • 4. The fusible link of claim 1, wherein the first member and the second member extend adjacent the first surface of the link segment.
  • 5. The fusible link of claim 1, wherein the first member extends adjacent the first surface of the link segment, and wherein the second member extends adjacent the second surface of the link segment.
  • 6. The fusible link of claim 1, wherein the first and second members extend substantially perpendicular to the first surface of the link segment.
  • 7. The fusible link of claim 1, wherein the link segment is substantially planar.
  • 8. The fusible link of claim 7, wherein a plurality of apertures extend through the link segment.
  • 9. The fusible link of claim 7, wherein the fusible link is made of a first conductive material, and wherein a second conductive material is deposited on the link segment, the second conductive material having a lower melting temperature than the first conductive material.
  • 10. The fusible link of claim 1, wherein the fusible link is made of a conductive material that is the same conductive material as the first and second cables.
  • 11. The fusible link of claim 1, wherein the fusible link is made of a conductive material that is an alloy of the conductive material of the first and second cables.
  • 12. A fusible link for a cable assembly, comprising:a link segment having a first member extending transversely from the link segment, and a second member extending transversely from the link segment, the link segment adapted to be electrically connected to first and second cables of the cable assembly, wherein the link segment has a first end and a second end, and wherein the first and second members extend adjacent the first end to adjacent the second end.
  • 13. The fusible link of claim 12, wherein the link segment has a first surface and a second surface, and a first side and a second side, wherein the first member extends from the first surface of the link segment, and wherein the second member extends from the second surface of the link segment.
  • 14. The fusible link of claim 13, wherein the first member extends from the first surface adjacent the first side thereof, and wherein the second member extends from the second surface adjacent the second side thereof.
  • 15. The fusible link of claim 12, wherein the link segment a first surface and a second surface, and a first side and a second side, and wherein the first member and the second member extend from the first surface of the link segment.
  • 16. The fusible link of claim 15, wherein the first member extends from the first surface adjacent the first side thereof, and wherein the second member extends from the first surface adjacent the second side thereof.
  • 17. The fusible link of claim 12, wherein the first member extends in a first direction from the link segment, and wherein the second member extends in a second direction from the link segment.
  • 18. The fusible link of claim 17, wherein the second direction is substantially the same direction as the first direction.
  • 19. The fusible link of claim 17, wherein the second direction is substantially the opposite direction as the first direction.
  • 20. The fusible link of claim 12, wherein a plurality of apertures extend through the link segment.
  • 21. A method of manufacturing a fusible link for a cable assembly comprising the steps of:providing a substantially planar strip of conductive material having a first surface and a second surface, and a first end and a second end; creating an aperture in the conductive material, the aperture extending from the first surface to the second surface; creating members transverse to the first and second surface of the conductive material, the transverse members extending from substantially the first end to the second end.
  • 22. The method of claim 21, further comprising the step of dicing the strip into individual fusible links prior to creating the transverse members.
  • 23. The method of claim 21, further comprising the step of adding a second conductive material on one of the first and second surfaces, the second conductive material having a lower melting temperature than the first conductive material, the second conductive material being added adjacent the aperture in the conductive material.
  • 24. The method of claim 21, wherein the strip of conductive material has a first side and a second side, wherein the first side of the strip of conductive material is bent at an angle to the first surface to create a first transverse member, the first transverse member extending in a direction from the first end to the second end, and wherein the second side of the strip of conductive material is bent at an angle to the first surface to create a second transverse member, the second transverse member extending in a direction from the first end to the second end.
  • 25. The method of claim 21, further comprising the step of connecting the first end of the fusible link to a first cable and connecting the second end of the fusible link to a second cable.
  • 26. The method of claim 21, further comprising the step of creating a plurality of apertures in the conductive material, the apertures extending from the first surface to the second surface of the conductive material.
  • 27. A fusible link for a cable assembly, comprising:a link segment having a first surface and a second surface, and a first side and a second side, the link segment further having a first member extending transversely from the link segment and a second member extending transversely from the link segment, wherein the first member extends adjacent the first surface of the link segment, and wherein the second member extends adjacent the second surface of the link segment, the link segment adapted to be electrically connected to first and second cables of the cable assembly.
  • 28. The fusible link of claim 27, wherein the first member extends from the first side of the link segment and wherein the second member extends from the second side of the link segment.
  • 29. The fusible link of claim 27, wherein the first member extends in a first direction from the link segment, and wherein the second member extends in a second direction from the link segment.
  • 30. The fusible link of claim 29, wherein the second direction is substantially the opposite direction as the first direction.
US Referenced Citations (31)
Number Name Date Kind
1175103 Williams Mar 1916 A
1579596 Cote Apr 1926 A
2414865 Genter Jan 1947 A
2872501 McMahon Feb 1959 A
3422213 Webb Jan 1969 A
3601737 Baird et al. Aug 1971 A
3766307 Andrews, Jr. Oct 1973 A
3766509 Cameron Oct 1973 A
4280748 McHenney et al. Jul 1981 A
4308515 Rooney et al. Dec 1981 A
4333701 Schick Jun 1982 A
4365226 Barry et al. Dec 1982 A
4391485 Urani Jul 1983 A
4679877 Ahroni Jul 1987 A
4734059 Melugin Mar 1988 A
4831353 Gaia et al. May 1989 A
4880943 Kuzuno et al. Nov 1989 A
4958426 Endo et al. Sep 1990 A
5018991 Katz et al. May 1991 A
5162773 Shiozaki Nov 1992 A
5241134 Yoo Aug 1993 A
5298877 Gurevich et al. Mar 1994 A
5304740 Bozell et al. Apr 1994 A
5329065 Marney et al. Jul 1994 A
5345210 Swensen et al. Sep 1994 A
5391836 Bortas et al. Feb 1995 A
5481239 Di Troia Jan 1996 A
5493069 Conti Feb 1996 A
5509202 Abdow Apr 1996 A
5591366 Schmidt et al. Jan 1997 A
6046665 Oh et al. Apr 2000 A