CA1073949A - Cartridge type fuse - Google Patents
Cartridge type fuseInfo
- Publication number
- CA1073949A CA1073949A CA263,040A CA263040A CA1073949A CA 1073949 A CA1073949 A CA 1073949A CA 263040 A CA263040 A CA 263040A CA 1073949 A CA1073949 A CA 1073949A
- Authority
- CA
- Canada
- Prior art keywords
- tube
- fusible element
- recess
- cartridge type
- notch
- 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
Links
Landscapes
- Fuses (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A novel cartridge type fuse assembly is presented wherein a tube is provided with at least a recess at each end of the outer surface thereof in which an end of a fusible element is received and the end of the fusible element is soldered with a metallic cap attached over the end of the tube.
A novel cartridge type fuse assembly is presented wherein a tube is provided with at least a recess at each end of the outer surface thereof in which an end of a fusible element is received and the end of the fusible element is soldered with a metallic cap attached over the end of the tube.
Description
- 107394~
1 Field of Invention: -The present invention is related to a cartridgetype fuse assembly and more specifically to the construction of the fuse assembly.
Background of Invention:
In a conventional fuse assembly of a tubular type wherein a fusible element is stretched from one end to another end, the respective end positions of the fusible element being disposed substantially diametrically opposite each other with respect to the circumferential phase thereof whereby the fusible element is diagonally extended through within a tube, there have been drawbacks as explained below.
In such a fuse assembly, a length of elongated fusible element is inserted into a tube and the both ends of the fusible element are bent back on the outer surface of the tube. Thereafter, a metallic cap is fitted or attached over each end of the tube over which a respective end of the fusible element is bent back. It is generally necessary to provide a suitable gap or clearance between an inner diameter of the cap and an outer diameter of the tube in order to connect both with each other. Therefore, in the case the fusible element is one having a large cross sectional area, it is difficult to fit the cap over the tube accompanied by the fusible element, at each end of the tube. On the other hand, if the cross sectional area of the fusible element is small, the center of the cap is displaced eccentrically from the central axis the tube and also an inclination of the cap with respect to the axis of the tube may exist as additional problems which would cause obstacle state when the fuse assembly is installed in a fuse-holder.
-1 Also, the fusible element is subjected to compression between the end of the tube and the inner surface of the cap thereby creating possibility of deformation of the fusible element and/or tearing of the fusible element. Further, if the clearance between the tube and the cap is too large, the connection therebetween may result in inferior state.
Summary of Invention:
Accordingly, it is an object of the present invention to provide a novel cartridge type fuse assembly which is free from the drawbacks above.
In other words, it is an object of the present invention to provide a fuse assembly wherein the both ends of the tube are covered with metallic caps maintaining reliable connection between the tube and the caps with containing the fusible element stretched inside of the tube from one cap to another.
It is still an object of the present invention to provide a fuse assembly maintaining the concentricity between the axes of the tube and the metallic caps disposed at opposite ends of the fuse assembly in order to prevent obstacle state of the fuse assembly upon installation into a fuse holder.
It is a further object of the present invention to make the construction of the fuse assembly which permits easy and reliable assembling operation for using any size and/or shape in cross saction of an elongated fusible element.
According to the present invention, the objects above are accomplished. The fuse assembly of the present invention includes a tubular member or tube through which the elongated fusible element is passed and the tube is provided with a recess or recesses on the outer surface thereof at 1~73949 .
1 each end of the tube in which an end of a fusible element having a certain length is received. By this provision of the recess(es) at each end of the tube, the fusible element having any desired cross sectional area is arranged to be received within the recess so that the drawbacks of installing the metallic cap at each end is obviated.
The invention will be further explained in connection with the accompanying drawings, the description of which follows.
Brief Explanation of Drawings:
Fig. 1 is a perspective view of a tube employed in a fuse assembly of an embodiment according to the invention;
and ' Fig. 2 is a view of a longitudinal cross section of ; the fuse assembly according to the invention.
Description of Embodiment:
Referrlng to Fig. 1, there is shown a tube 1 used in constructing a fuse assembly of the present invention. As illustrated, at each end of the tube 1 there is at least a specially configured portion having a notch "a", an enlarged depressed area "b" and a narrowed area or groove "c". It - is further preferable to provide two specially configured portions at each of the ends of the tube 1 at diametrically opposite peripherical places as shown in Fig. 1 so as to align one portion of the opposite end respectively and thus to make the number thereof four.
Referring to Fig. 2, a cross sectional view of a fuse assembly is shown in which the tube 1 is employed. A
fusible element 3, i.e. an elongated fusible element having a suitable length is inserted inside of the tube 1 and one .
r~, - 1~739~9 1 end of the fusible element is picked up outside of the tube through the notch "a" at one end and the other end of the fusible element 3 is also picked up through the notch "a"
diametrically opposing the first mentioned notch "a" at the opposite end of the tube 1 so that the fusible element extends diagonally inside of the tube 1. The opposite end portions of the fusible element 3 are bent on the outer surface of the tube 1 so that the tips of the fusible element 3 are received in the area "b" and groove "c" at the each end of the tube 1, respectively. The enlarged depressed area "b"
serves as a pool to receive molten solder 4 which will connect the fusible element~, upon solidification, with a metallic cap 2 adapted to cover the end of the tube. Another cap 2 is also attached to the opposite end of the tube 1 in a manner similar to that just explained above thereby completing the fuse assembly.
The construction of the tube assembly of this invention is arranged as explained above, the caps at the both ends are securely attached to the tube maintaining the concentricity between the respective axes of the tube and the caps and the construction presents the improvement in reliability of the fuse assembly. Further, there is no problem in attaching caps even in case the cross sectional area of the fusible element is large. Also, such fusible element is easily stretched between the both ends of the tube.
While the present invention has been explained in detail referring to the particular embodiment thereof, it should be understood that the variation and modification of the cartridge type fuse assembly are available to those skilled in the art within the spirit and scope of the present invention .
, . . .
1 Field of Invention: -The present invention is related to a cartridgetype fuse assembly and more specifically to the construction of the fuse assembly.
Background of Invention:
In a conventional fuse assembly of a tubular type wherein a fusible element is stretched from one end to another end, the respective end positions of the fusible element being disposed substantially diametrically opposite each other with respect to the circumferential phase thereof whereby the fusible element is diagonally extended through within a tube, there have been drawbacks as explained below.
In such a fuse assembly, a length of elongated fusible element is inserted into a tube and the both ends of the fusible element are bent back on the outer surface of the tube. Thereafter, a metallic cap is fitted or attached over each end of the tube over which a respective end of the fusible element is bent back. It is generally necessary to provide a suitable gap or clearance between an inner diameter of the cap and an outer diameter of the tube in order to connect both with each other. Therefore, in the case the fusible element is one having a large cross sectional area, it is difficult to fit the cap over the tube accompanied by the fusible element, at each end of the tube. On the other hand, if the cross sectional area of the fusible element is small, the center of the cap is displaced eccentrically from the central axis the tube and also an inclination of the cap with respect to the axis of the tube may exist as additional problems which would cause obstacle state when the fuse assembly is installed in a fuse-holder.
-1 Also, the fusible element is subjected to compression between the end of the tube and the inner surface of the cap thereby creating possibility of deformation of the fusible element and/or tearing of the fusible element. Further, if the clearance between the tube and the cap is too large, the connection therebetween may result in inferior state.
Summary of Invention:
Accordingly, it is an object of the present invention to provide a novel cartridge type fuse assembly which is free from the drawbacks above.
In other words, it is an object of the present invention to provide a fuse assembly wherein the both ends of the tube are covered with metallic caps maintaining reliable connection between the tube and the caps with containing the fusible element stretched inside of the tube from one cap to another.
It is still an object of the present invention to provide a fuse assembly maintaining the concentricity between the axes of the tube and the metallic caps disposed at opposite ends of the fuse assembly in order to prevent obstacle state of the fuse assembly upon installation into a fuse holder.
It is a further object of the present invention to make the construction of the fuse assembly which permits easy and reliable assembling operation for using any size and/or shape in cross saction of an elongated fusible element.
According to the present invention, the objects above are accomplished. The fuse assembly of the present invention includes a tubular member or tube through which the elongated fusible element is passed and the tube is provided with a recess or recesses on the outer surface thereof at 1~73949 .
1 each end of the tube in which an end of a fusible element having a certain length is received. By this provision of the recess(es) at each end of the tube, the fusible element having any desired cross sectional area is arranged to be received within the recess so that the drawbacks of installing the metallic cap at each end is obviated.
The invention will be further explained in connection with the accompanying drawings, the description of which follows.
Brief Explanation of Drawings:
Fig. 1 is a perspective view of a tube employed in a fuse assembly of an embodiment according to the invention;
and ' Fig. 2 is a view of a longitudinal cross section of ; the fuse assembly according to the invention.
Description of Embodiment:
Referrlng to Fig. 1, there is shown a tube 1 used in constructing a fuse assembly of the present invention. As illustrated, at each end of the tube 1 there is at least a specially configured portion having a notch "a", an enlarged depressed area "b" and a narrowed area or groove "c". It - is further preferable to provide two specially configured portions at each of the ends of the tube 1 at diametrically opposite peripherical places as shown in Fig. 1 so as to align one portion of the opposite end respectively and thus to make the number thereof four.
Referring to Fig. 2, a cross sectional view of a fuse assembly is shown in which the tube 1 is employed. A
fusible element 3, i.e. an elongated fusible element having a suitable length is inserted inside of the tube 1 and one .
r~, - 1~739~9 1 end of the fusible element is picked up outside of the tube through the notch "a" at one end and the other end of the fusible element 3 is also picked up through the notch "a"
diametrically opposing the first mentioned notch "a" at the opposite end of the tube 1 so that the fusible element extends diagonally inside of the tube 1. The opposite end portions of the fusible element 3 are bent on the outer surface of the tube 1 so that the tips of the fusible element 3 are received in the area "b" and groove "c" at the each end of the tube 1, respectively. The enlarged depressed area "b"
serves as a pool to receive molten solder 4 which will connect the fusible element~, upon solidification, with a metallic cap 2 adapted to cover the end of the tube. Another cap 2 is also attached to the opposite end of the tube 1 in a manner similar to that just explained above thereby completing the fuse assembly.
The construction of the tube assembly of this invention is arranged as explained above, the caps at the both ends are securely attached to the tube maintaining the concentricity between the respective axes of the tube and the caps and the construction presents the improvement in reliability of the fuse assembly. Further, there is no problem in attaching caps even in case the cross sectional area of the fusible element is large. Also, such fusible element is easily stretched between the both ends of the tube.
While the present invention has been explained in detail referring to the particular embodiment thereof, it should be understood that the variation and modification of the cartridge type fuse assembly are available to those skilled in the art within the spirit and scope of the present invention .
, . . .
Claims (2)
1. A cartridge type fuse comprising:
a tube provided with a recess in the outer surface thereof at each end each of said recesses providing a solder receiving depressed area, and being formed to provide a notch at the end of the tube, the depressed area extending in an axial direction the shape of which is such that the width thereof is narrow at the portion adjacent said notch, the opposite end of the recess terminates in a narrow axial groove and the intermediate portion is enlarged in width;
a fusible element stretched between the opposite ends of said tube, each end of said fusible element being passed through said notch and bent over said recess into which said bent end of said fusible element is embedded; and an end cap fitted onto each end of said tube and soldered with said end of said fusible element by solder received in said recess.
a tube provided with a recess in the outer surface thereof at each end each of said recesses providing a solder receiving depressed area, and being formed to provide a notch at the end of the tube, the depressed area extending in an axial direction the shape of which is such that the width thereof is narrow at the portion adjacent said notch, the opposite end of the recess terminates in a narrow axial groove and the intermediate portion is enlarged in width;
a fusible element stretched between the opposite ends of said tube, each end of said fusible element being passed through said notch and bent over said recess into which said bent end of said fusible element is embedded; and an end cap fitted onto each end of said tube and soldered with said end of said fusible element by solder received in said recess.
2. A cartridge type fuse as claimed in Claim 1 wherein said recesses are disposed at diagonally opposite ends of said tube and said fusible element is stretched diagonally in said tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA263,040A CA1073949A (en) | 1976-10-08 | 1976-10-08 | Cartridge type fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA263,040A CA1073949A (en) | 1976-10-08 | 1976-10-08 | Cartridge type fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1073949A true CA1073949A (en) | 1980-03-18 |
Family
ID=4107025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA263,040A Expired CA1073949A (en) | 1976-10-08 | 1976-10-08 | Cartridge type fuse |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1073949A (en) |
-
1976
- 1976-10-08 CA CA263,040A patent/CA1073949A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |