US1491905A - Inclosed electric fuse - Google Patents

Description

April 29, 1924.

A. L. 'EUSTICE INCLOSED ELECTRIC FUSE Original Filed June 21, 1918 fade/W.

I I med .5 [102 258,

Patented Apr. 29, 1924.

UNITED STATES 1,491,905 PATENT OFFICE.

ALFRED L. nus'ricn, or EVANSTON, rumors.

INCLOSED ELECTRIC FUSE.

Original application flled June 21, 1918, Serial No. 241,115. Divided and this application filed August 10,

1922. Serial No. 580,822.

To all whom it may concern: 1

Be it known that I, ALFRED L. EUSTICE, a citizen of the United States, residing at Evanston, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Inclosed Electric Fuses, of which the following is a specification.

This invention relates to inclosed electric fuses in which a shell or housing is provided with an end closure that also serves for holding a terminal in place, and particularly to fuses having end closures composed of a plurality of separable members closing together on opposite sides of the terminal of the fuse,

and holding the same against both longitudinal and rotary movement while constituting a substantially continuous disk-like closure member adapted to be clamped between the end of the shell. and a ferrule, as fully set forth in my application Serial No. 241,115, filed June 21, 1918, which has matured into Patent No. 1,450,029, granted March 27, 1923, whereof this application is a division.

The present application relates specifically "to an embodiment of end closure of the general type above described, in which the members are separated in two intersecting planes so that one member provides not only a 80 portion complementary to and abutting the other member, but a support therefor; the

combined abutting and supporting member beingalso constructed in any one of several ways for interengagement with the terminal 88 of the fuse in order to assist in holding it in position.

In the accompanying drawings, in which three embodiments of the invention are shown by way of illustration- Figures 1, 2, and 3 are, res ectively, a s de elevation, an edge view, an a perspectlve view of a terminal constructed to be received by one form of end closing anchoring disk, the disk being shown in diametric sec- 4 tion in Figure 1 and in elevationin Figure 2.

Figures 4, 5, and 6 are, respectively, an edge view of the disk employed in Figures 1, 2, and 3, abottom view thereof,and a view 50 of the ed e thereof opposed to the edge shown in igure 4.

Figure 7 is a perspective viewof the coacting sealing washer employed In Figures 1 to 6. 7 i0 Figures 8 and 9 are perspective views of another form of the invention, Fi re 8 showing the disk as seen from the un erside and with its movable member 0 en, and Fi ure 9 showing it as seen from t e upper si e when closed.

Figure 10 is a perspective view of a third embodiment of the invention; and

Figure 11 is a perspective view of the form of terminal used in connection with Figure 10.

Referring to Figures 1 to 7, 1 represents a terminal having an exterior end of knife blade form and a perforated interior end 1 to receive the fusible link. Terminal 1 is intended to be fitted to the end of a cylindrical shell in a manner common and well known in inclosed electric fuses, and this end is provided with a disk 2 embracing the reduced or neck portion 1 of the terminal between the shoulders 1 and 1, said disk being thereafter secured to the shell by being clamped between the end thereof and a securing cap, ferrule, or the like, and being adapted by its embrace of the terminal to hold the terminal against both longitudinal and rotary displacement relatively to the shell.

In order that the disk 2 may be brought into and out of the described relation with the terminal 1, it is composed of two members 2, 2", constructed with lap joints 2, 2 at opposite ends of a diameter thereof, and preferably hinged together at 2' through one of said lap joints. The disk is further constructed with lugs 3 by means of which it can enter into engagement with the end of the shell to prevent rotation thereon when clamped by the cap or ferrule. In order to form a more effective abutment for the disk 2 on the terminal 1, and at the same time to assist in sealing the joints of the disk against escape of gases generated at the time of blowing of the fuse, a washer 4 having a slot 4 through which it receives the terminal 1 is fitted upon the terminal above the disk 2, the upper shoulders 1 of the terminal being recessed at 1" to receive the reduced end walls 4 of said slot and thus leave the under surface of the washer flush with the shoulders 1.

In Figures 8 and 9, disk 5, adapted to em brace the terminal 1 similarly to the disk 2, consists of a combined base and abutting member 5? which has a large central opening 5 to receive the terminal endwise, and

a reduced opening 5" which fits the width of the terminal, and a movable member 5 pivoted at 5 to the combined base and abutting member and adapted to swing upon said pivot into and out of embracing relation to the terminal; said movable member being recessed at 5 to lit the terminal and hold it in abutment with the wall 5 of the opening 5', and to complete therewith the opening 5 shown in Figure 9, which fits the neck 1 of the terminal.

According to Figure 10, the disk 6 is constructed with an abutting face 6* and a supporting face (i which are complementary to corresponding faces of a movable member 6 pivoted thereon at said members being recessed at 6 and 6*, respectively, in a mannor to it the reduced portion 7- of the terminal 7 shown in Figure 11. Said disk is further provided with an impaling tongue 6 that enters transverse opening 7* in the terminal 7 to lock the disk 6 against longitudinal movement upon the terminal. Tongue 6 is reduced beyond the shoulder 6 and a projection 6 on the movable member 6 abuts said shoulder from the opposite side or" the opening 7 In using the combined end-closing and terminal fixing disk, or combined base-memher and disk, it will be interlocked with the terminal in the manner described, then positioned upon the end of the shell 8, and then secured thereon by the screw cap or ferrule 9.

In each form of the invention above de scribed, one disk section serves as a base to which the other disk section is permanently but movably connected, and these disk sec tions, and particularly the portions thereof lying outside of the terminal, are mated together by surfaces at least some of which extend at such substantial angles to the longitudinal axis of the terminal as to develop an efiective overlap of the disk sections and develop solid continuous disk portions around the terminal, which overlap and more efiectively check the escape of gas. Moreover, the disk sections not only embrace the terminal blade to resist rotation thereof, but intersect it to resist longitudinal dis placement.

In the form shown in Figures 8 and 10, the disk member which serves as the base is superficially coextensive with the entire disk except for recesses forming a gateway permitting it to move laterally upon the blade in entering into longitudinal interlock therewith, so that the shell engaging ].ugs 3 are both on one piece, the movable disk section swings in laterally to close the blade-receiving gate, and complete the embrace of the blade, and the joint between the sections extends for about a semi-diameter in a plane parallel to the face of the disk, and thence in an approximately diametric plane parallel to the axis. The construction of Figure 10 diliers from that of Figure 8 in that the gateway oi Figure 10 extends through to the perimeter of the base section 6 and admits the blade by passing the tongue (i through the eye T, whereas in Figure 8 the base section 5 must be assembled with the blade, initially, by an endwise movement, and then by a lateral movement of the blade relatively to the disk.

I claim:

1. In a blade-terminal olosed-shell electric fuse, a disk adapted to be secured to the end of the shell and to close the same, and having a central opening conforming to a, section of the terminal and constructed of two sections permanently united but relatively movable to open and close said central opening; said sections admitting said terminal to said central opening by lateral assembly when the sections are apart, and embracing and holding the terminal against longitudinal and rotary displacement when they are together.

2. In a blade-terminal closed-shell electric luse, a disk adapted to be secured to the end of the shell and to close the same, and having a central opening conforming to a section of the terminal and constructed of two sections permanently united but relatively movable to open and close said central opening; said sections admitting said terminal to said central opening by lateral assembly when the sections are apart, and embracing and holding the terminal against longitudinal and rotary displacement when they are together; and the portions of said sections beyond the sides of the terminal being mated together by lap joints.

3. In a blade-terminal closed-shell electric fuse, a disk adapted to be secured to the end of the shell and to close the same, and having a central opening conforming to a section of the terminal and constructed of two sections permanently united but relatively movable to open and close said central opening; said sections admitting said terminal to said central opening by lateral assembly when the sections are apart, and embracing and holding the terminal against longitudi- 11:11 and rotary displacement when they are together; and the portions of said sections lying outside of the central opening being mated together by overlapping faces and abutting faces.

4. In a closed-shell electric fuse, an endclosing and terminal-holding disk adapted to be secured to the shell and having a central aperture shaped to conform to a section of the terminal; said disk comprising a base section constructed with a gateway communicating with said aperture and admit-tin the terminal thereto by lateral assembly, an a complementary section forming a wall of said aperture pivoting on said base sect-ion to close and open said gateway and thereby confine the terminal in or release it from said aperture.

5. In a closed-shell electric fuse, an endclosing and terminal-holding disk adapted to be secured to the shell and having a central aperture shaped to conform to a section of the terminal; said disk comprising a base section constructed with a gateway communicating with said aperture andadmitting the terminal thereto by lateral assembly, and a complementary section forming a wall of said aperture pivoting on said base section to close and open said gateway and thereby confine the terminal in or release it from said aperture; said base section and complementary section being mated together by abutting faces and overlapping sliding faces.

6. In a closed-shell electric fuse, an endclosing and terminal holding disk adapted to be secured to the shell and having a central aperture shaped to conform to a section of the terminal; said disk comprising a base section constructed with a gateway communicating with said aperture and admiti ting the terminal thereto by lateral assembly, and a complementary section forming a wall of said aperture pivoting on said base section to close and open said gateway and thereby confine the terminal in or release it from said aperture; said base section and complementary section being mated together by abutting faces and overlapping sliding faces; and said base section overlapping the complementary section to the perimeter of the disk.

7. In a closed-shell electric fuse, an endclosing and terminal-holding disk adapted to be secured to the shell and having a central aperture shaped to conform to a section of the terminal; said disk comprising a base section constructed with a gateway communicating with said aperture and admitting the terminal thereto by lateral assembly, and a complementary section forming a wall of said aperture pivoting on said base section to close and open said gateway and thereby confine the terminal in or release it from said aperture; said base section and complementary section being mated together by abutting faces and overlapping sliding faces; the overlapping portion of the base section having a terminal impaling tongue extending into the gate thereof.

8. A combined end-closure and terminal lock for enclosed electric fuses, comprising a combined base and disk divided in a transverse plane through a part of the thickness of the disk and having severance of one divided part of its disk from the base member completed in a plane parallel to the face of the base member and intersecting said transverse plane; the portion of the disk thus severed being permanently but movably mounted upon the base.

9. A combined end-closure and terminal lock for enclosed electric fuses, comprising a combined base member and disk divided in a transverse plane transversely through a part of the thickness of the disk, having severance of one divided part of the disk completed in a plane parallel to the face of the base member and intersecting said transverse plane and the other part of the disk left integral with the base member.

Signed at Chicago, Illinois, this 5th day of August, 1922.

ALFRED L. EUSTICE.

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