US1716884A - of waterbury - Google Patents

Description

Patented June 11, 1929.

UNI'TEDQSTAT S PATEN 'E FE F JOHN, 11. C QFI W EB IF RY, QNNEC quyessI Givoit Fro scovILf msfim wm me con r alvY', 0F 'W'A'IJIIJRBURY, conmac'rrcona COBBORATIQN OF. CONNECTICUT.

' FUSE. p I 4- I. at] ff-. 1 .i.. j s Application filed November 13,1925. Serial SNo.-68,771.'.- 122" 11.1".2. -.i. 'l .fbi. 21-. 4;.

1;: Thisinvention-relates-to improvements in tween the underside. of-the top of the cap fuses. i-' "w' randtheend of-qtheicasing-wfi w In a-certalin'class of fuses,-fantlzmoraparticularlythe? class; iknown as. the 1 renewable 5 fuse type, the body ofthe fuse isfats t y .constructed from fiber; theendsbfz-tll ibp y being closed by flanged metallic caps-.;j ll-he fuse link, which is destroyed when the fuse blows, .is eon'nectea to these caps in varying ways. \Vhen the fuse blows, hot gases are generated, so that the caps are subjected to considerable strain, and they should, therefore, be firmly secured to the fiber body of the fuse. Further, it is highly desirable that they be so firmly secured to "the fiber body that they cannot be removed without destroying the body, or, if removed, indicate that the fuse has been tampered with.

The present invention has for its object 90 to produce an eflicient and inexpensive means for firmly securing the metallic caps of fuses to the fiber bodies.

\Vith this and other objects not specifically referred to in view, the invention con- 5 sists in certain constructions, parts, improvements and combinations as will be hereinafter described and specifically pointed out.

Referring to the drawings, which illustrate one embodiment of the invention,

Figure 1 is a longitudinal sectional view of a fuse embodying the invention.

Figure 2 is a section on the line 22 of Fig. 1.

Figure 3 is an end view of a sleeve forming a part of the invention.

In said drawings, 1 indicates the fiber body of the fuse. The body is provided near each of its ends with a plurality of perforations or holes, marked 2. It will be 40 understood that a considerable pressure of gas is generated in the fuse when the fusible link blows, and means are provided to prevent the escape of gas through the perforations referred to. As shown, each end of 5 the fuse is provided with a metallic sleeve 3 which extends into the end of the tube and closes the perforations. To provide for efiicient venting, a spacer is employed which holds the underside of the closing cap away from the end of the casing. As shown, this spacer is formed by bending over the top of the sleeve, as indicated at 4, the bent over part being provided with a plurality of small pro ections 5 which insure a space be whieti are marked G,=and meansare provided (for engaging the holes beforereferred to and the flanges of; the caps, for,;lockin g thc;caps :"tq; tl1e-:Ic a.Sing j' iAS shown, ithese locking ,meansi a re,. providd by formingas-many -tpngues- 7' in; the flange of;-eaclt cap asrthere are perforations or holes in the body of the fuse. \Vhen the caps are in position, these tongues are bent in, as indicated in Fig. 1, and lock the caps securely to the casing.

To secure the fusible link in position each cap may be provided with a threaded orifice which receives a threaded plug 8, these plugs, in the construction shown, engaging a tubular fusible link 9 which may be of the type shown and described in the application of Morris H. Bennett, Ser. No. 68,775 filed at even date herewith. To insure the venting of the fuse when the link blows, the flange of each cap is provided with vertical passages 10, forming venting channels which, when the cap is in position connect with the space between the top of the cap and the end of the casing, this space being formed by the spacer hereinbefore referred to, so that efficient venting of the fuse is secured when the link blows.

It will be understood that changes and variations may be made in the particular construction herein described without departing from the invention, and that the invention as claimed is not confined thereto.

\Vhat is claimed is:

1. The coi'ubina-tion with a fuse casing having small openings near an end thereof, of

The, Casing f is--el0sedby,

a flanged cap for closing the casing, a spacer having projections providing a space between the under side of the cap and the end of the casing, the flange of the cap having channels which connect with the space formcd by the spacer, means inside the casing for closing the openings, means for engaging the openings for locking the cap to the casing, a fusible link in the casing, and means for connecting the link to the cap.

2. The combination with a fuse casing having small openings near an end thereof, of a flanged cap for closing the casing, a sleeve in the end of the casing, the end of the sleeve overlapping the end of the casing and hitting; projections constituting spacing -an'd Having p rejections co n'stitfltin' g =meztnsfbetwee'n the tmdei" s'id'eb'fthe'cap an-(l the end of= the casing; the flange "of the -cap having eliannelsWvhieh eoiuiecviwitli the =sleeve' in the 'end' df' tlle "cas ing;

means between; the undcn side-0f thecwp and the entl of the c zisingi, the fiiihge' of the cap having channels which connect with the space. fonned by, the spacer means for enmeans for connecting the link to the cap the'casing fofi'elosin g theopeflings", locking 'tongueswn the 'cdp top'n a' ing the openings to hold the cap to the casing, a fusible linl t in the casing, and means for connecting the link to the cap.

4. The combination with a fuse casing having s n'all openings near the end thereof,

of a flanged cap for closing the casing at sleeve inside the casing for closing the openings, the out-er end of the sleeve having )ro jections constituting spacing means, and the flange of the cap having channels which connect with'the space formed by the spacer,

tongues on the cap for engaging the openings to lock the cap to the casing,-a fusible link in the casing, and means for connecting the li'nk to the cap.

In testimony whereoflI have hereunto set my hand;

JOHN H. GOSS.

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