US1725690A - Renewable knife-blade and cartridge type fuse - Google Patents

Description

F. L. YOUNG Aug. 20, 1929.

RENEWABLE KNIFE BLADE AND CARTRIDGE TYPE FUSE Filed April l0, 1928 nuy ATToRugY w mm. MWA/.

////////////////,//////////////V//////vdw A i VPatrizier OFFICE.

FRANK L. YOUNG, 0F SLN ANTONIO, TEXAS.

BENEWABLE XNIFEFBLADE AND CARTRIDGE TYPE FUSE.

Application led April! 10,

This invention relates to renewable knife blade and cartridge fuses.

An object of the invention is the provision of a fuse having a removable fusible element which may be replaced when neces sary and in which the ends of the fusible element are clamped between a movable partition and a closure ca A further object of the invention is the provision of a fuse having a movable partition located at each end and a passage through which is adapted to be inserted, the free end of a fusible element with the free end bent in close Contact with the outer face of a partition and clamped thereto by a closure, the partition being either pivoted or removablyr mounted in an end of the fuse l and maintained against rotation b T oppositely dis osed lugs projecting laterally from the peripiery of the partition and received within sockets in a brass ferrule mounted upon a body formed of insulating material.

This invention will be best understood from a consideration of the following detailed description, in` connection with the accompanying drawings; nevertheless, it is to be understood that the invention is not confined to the disclosure bein susceptibleof such changes and modificationsas shall define no material departure from the salientv features of the invention as expressed in the appended claims.

' In the drawings Figure 1 is a vertical section showing my invention applied to one form of fuse.

Figure v 2 is a horizontal section `taken along the line 2-2 of Fig. 1,

Figure 3 is a vertical section of a slightly modified form of the invention shown in Fig: 1, v igure 4 is a horizontal section taken along the line 4-4 of Fig. 3,

Figure 5 is a vertical'section of the form similar to that shown in Fig. 1 applied to the cartridge fuse,

Figure 6 is a vertical seetion'of the form similar to the knife blade fuse shown in Figure 7 is a fragmentary vertical section `of one end of a cartridge fuse showing a further modified form of the invention,

Figure 8 is a fragmentary vertical section of a further modified formpof a knife blade fuse Figure 9 is a horizontal section taken along l the line 9-9 of Fig. `8,

lon the pintle 2 1928. Serial No. 268,986.

Figure 10 is a fragmentary vertical section of a further modified form of the knife blade fuse shown in Figs. l and 3,

Figure 11 is a horizontal section take along the line 11-11 of Fig. 10,

Figure 12 is a view in erspective of a fusible element, one form of) the fusible element employed inconnection with the fuse, Figure 13 is a modified form of the fusible element shown in Fig. 12. Referring more particularly to the drawings, 20 designates a hollow body formed of insulating material to which is secured at the opposite ends thereof metal ferrules 2l upon which are threaded caps 22. The outer end 23 of a ferrule forms a seat for a partition 24. i This partition is provided with laterally projecting pintles or lugs 25, which are received within sockets 26 formed in the opposite side walls of the metal ferrule 2l. One portion ofthe partition, as shown at 27, is cut away to provide a passage. The portion'A of the partition, as shown at'28, and adjacent thecut away portion 27, isvreduced in size so that it will move within the ferrule 21. The remaining portion, as shown at 29, is of sufficient area to rest upon the upper edge of the ferrule 21.v

struction land the 5 t e reduced portion of the partition may be moved into thefe'rruIe when it is desired to apply a new fusible element .to the fuse. The fusible'element 30 has its lop osite ends 31 bent at anangle to the body of the element and located through the partition 24, and a closure disk knife blade section 32. When the ca 22 is screwed down upon the ferrule 21, t e end 31 of the fusible element 30 will be clamped between' the partition and the disk 32.

By this conlpivoting of the partition The disk 32 is formed integrally with a l knife blade 33, the blade projects outwardly therefrom, and is adapted to be engaged in the usual manner by a pair of spaced contacts; From the inner faee lof the partition 32 projects lugs 34 adapted to be received within sockets 35 formed in the ferrule 21, in order to prevent rotation of the disk 32. The outer end of the cap 22 is rov'ided with 'a flange 36, which engages t e outer face of the disk 32 adjacent the periphery thereof for clamping the disk 32 onto the free end 31 of the fusible element 30.

In a plying4 the fusible element 30" to the fuse, tgz caps 22 are removed and likewise the disk 32 or knife blade section, the free I ends 31 of the fusible element are then inserted throughthe passages 27 in the partition 24 and bent into flat contact with the outer face of the partition. The disk 32 or knife blade section is then applied and the cap 22 is screwed into position whereby the free ends of the fusible element are clamped rigidly together. The construction shown in Fig. 3 is identical with the construction shown in Figs.V 1 and 2 except that where the partition is cut away in Figs. 1 and 2, the

` partition 24 in Fig. 3 is provided with a slot 40 through which is inserted the fusible element 30. The other elements of the fuse are designated with similare-.reference numerals found in Figs.A 1 and 2.

Referring to the modied form shown in Fig. 5, it will be seen that the body member 45 is formed of nonconducting material and has mounted at the opposite ends and con-V nected thereto, brass ferrules 46. The ferrule has a reduced portion, as shown at 47, which is threaded VtoA receive the internal -threads of a cap shaped contact member 48. The internal portion of the ferrul'e is provided with a shoulder 49 upon which is adapted to be'seated a partition 50 pivoted at 51 to the ferrule 46, as shown in Figs. 1 to 4 inclusive. i

The partition is provided with'a cut out portion 52 through which is inserted an end ofthe fusibleeleinent 53 with the en d 54 clamped between the inner face of the cap 48 and the outer face of the partition 50.

The portion of the partition 50 adjacent thev cut away portion 52 is reduced in area so that said portion may be moved inwardly of the ferrule when the partition is swung upon its pivots 51. i

The modified form shown in Fi 6 is similar in all respects except that it is provided with a slot instead of a cut away ortion through which is inserted an end o a fusible element 53.

In the construction shown in Figs. 8 and 9, the partition is removable from the ferrule 66, since it merely has the portion adjacent the eripherylfli'esting upon a shoulder 67 of the errule. e partition is provided with a slot 68 through which is inserted an endof the fusible element. 69. Said end 70 is clamped between the partition 65 and ay of the fusible element 85 which is clamped as shown at 86 between a disk 87 of a knife blade section andthe partition 80. The lugs 81 and the sockets 82 provide for a pivotal mounting of the partition 80, while permitting removal of the partition from an end of the body member 88. i

In the construction shown in Fig. 7, the. lugs 90 are disclosed projecting laterally from the partition 91 which are received within similar sockets formed in the ferrule 92 so that the partition is removable from the ferrule while having pivotal qualities.

Referring to Fig. 12, a fusible element 93 is shown provided with cut out portions 94 for reducing the element at this point.

The fusible element 95 shown in Fig. 13 is provided with a reduced portion 96 which may be readily fused when too great a current is passed VAthrough the same.

It should be noted that various methods may be employed for securing the brass ferrules in all of the different devices of the insulating material and the hollow body, since these various forms of securing means Vmay be applied to any of the construction.

Similar reference numerals are being employed to indicate all like forms. The brassl ferrules may be pressed or screwed internally or externally. on the body members and secured against rotation by means of rivets 100. Instead of rivets the metal of the fer` rule may be cut or punched to form prongs 101 which are forced into the material of the body. In all of the closure elements passages 102 are provided to permit the escape of gas and air when a fuse is burned. Each' partition is provided with a notch or a plurality of notches 103 which are. adapted to be engaged by a suitable tool whereby one end of the partition may be raised. Furthermore the outer end of the ferrules may be grooved or not in alignment with the notches in the partitions for facilitating the insertion of the tool.

I claim 1. A fuse comprising a hollow body formed of insulating material, a metal ferrule secured to an end of the body and provided with a seat at the outer end, a disk pivoted to the fer-rule at diametically opposite points, and normally supported by the seat, said disk provided with a passage, a fusible link having an end inserted through the rpassage and bent into fiat contact with the outer face of the disk, and means removably connected to the ferrule for clamping the bent end of the link to the disk.

2. A fuse comprising a hollow body formed of insulating material, a metal 4fermuseo rule secured to an end of the body and provided with a seat at the outer end, and a pair of oppositely disposed sockets, a disk having laterally projecting lugs received by the sockets and normally supported bythe seat for pivotally mounting the disk, said disk provided with a passage, a fusible link having an end inserted through the passage and bent into flat contact with the outer face of the disk, and means removably connected to the ferrule for clamping the bent end of the link to the disk.

3. A fuse comprising a hollow body formed of insulating material, a metal ferpivoted to the ferrule, and normally sup` bent into fiat contact with the outer rule secured to an end of the body and provided with a seat at the outer end and a pair of oppositely disposed sockets, a disk having laterally projecting lugs received by the sockets and normally supported by the s eat for pivotally mounting tne disk, said disk rovided with a passage, a fusible link havmg an end inserted through the passa e and ace of the ddisk, and means removably connected lto the ferrule for clamping the bent end of the link to the disk, said disk being movable from the seat.

4. A fuse comprising a hollow7 body formed of insulating material, a metal ferrule secured to an end of the body and provided with a seat at the outer end, a disk ported by the seat, said disk provided with a passage, a fusible link having an end in serted through the passage and bent into flat contact with the outer faee of the disk, and means removably connected to the ferrule for clamping the bent end of the link to the ported by the seat, said disk provided with i a passage, a fusible link having an end in-u serted t rough'the passage and bent into fiat contact with the outer fase of the disk, means removably connected to the ferrule for clam ing the bent end of the link to the disk, sai disk beinfr movable to a position Where it will aline with the longitudinal axis ofthebody, with a portion of the disk being disposed within the ferrule, the portion of the disk which is adapted tobe moved into the ferrule having the periphery eut away on the are of a curve, the radius of the curve being less than the radius of the periphery of the remainingportion of the disk. l Y

FRANK L, YOUNG.

Images