US1246792A - Fuse device. - Google Patents

Description

E. 0. SCHWEHZERL N. J. CONRAD FUSE DEVICE.y

APPLICATION FILED DEc.a1. |914.

' 1,246,792. y Patented N0vf13, 1917.

2 SHEETS-SHEET l.

Patented Nov. 13, 1917.

2 SHEETS-SHEET 2.

FUSE DEVICE.

E. 0. SCHWEITZER 6L N. l. CONRAD.

APPLICATION FILED DEC. 31. I9I4. 1,246,792.

UNITED sTATEs PATENT oEEroE.

EDMUND O. SCHWEITZER AND NICHOLAS J. CONRAD, 0F CHICAGO, ILLINOIS, ASSIGNORS TO SCHWEITZER & CONRAD,I OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FUSE DEVICE.

Specification of Letters Patent.

Patented Nov. 13, 1917.

Application filed December 31, 1914. Serial No. 879,829.

To all whom. t may concern.'

Be it known that we, EDMUND- O. SCHWEITZER and NICHOLAS J.' CONRAD, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Fuse Devices, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

Our invention relates to fuse devices, and especially to fuse devices especially adapted for extra high potentials.

An object of the invention is to provide a. simple, practical and effective device of this kind and to secure certain highly desii-able results such as preventing an arc when the device operates, preventing undue generation of heat at such times, preventing breakage in the device when the fuse blows, and so on.

Other objects of the invention will appear in the further and more detailed consideration of the invention.

In carrying out the invention as hereinafter more fully set forth we provide a holder or container for the fuse, such holder or container preferably being of hard relatively unbreakable material. and having a comparatively small bore or channel in which the fuse may be arranged. One end of the fuse is secured to a terminal part of the device. and the other is mechanically connected with a spring which is held normally under restraint by the fuse. IVhen the fuse operates, the spring contracts, separating the end portion or terminal to which the fuse was connected from the other fuse terminal and thereby forming a long gap which will prevent an arc; and owing to the presence of the fuse holder or container an obstacle is in efect interposed in the path of the arc which has a damping or preventive effect thereon. and at the same time the explosion of the fuse is effectively coniined so as to prevent damage and lother objectionable results. The fuse holder or container. together with the spring is preferably inclosed in a tubular casing which also is desirably provided with arc extinguishing liquid and the spring is desirably combined with a liquid director adapt-- ed to direct said arc extinguishing liquid into a space where the fuse explosion has occurred, thereby having another influence tending to prevent arcing. A removable part forming a vent member` is desirably arf ranged at the end of the tubular casing, so that if necessary said part majv become separated from the casing to vent the device, and especially the fuse chamber therein upon operation of the fuse.

In the accompanying drawings Figure l is a longitudinal section 0f a portion ofl a fuse device embodying our present invention;

Fig. 2 is a cross section of the same taken on line Q-Q in Fig. l;

.Figs 3 and 4 are respectively a longitudinal section and an elevation of a detail of construction;

Fig. 5 is a longitudinal sec-tion of a modified form of device;

Fig. 6 is a plan view of the same;

Fig. 'T is a longitudinal section of a further modification; and

Fig. S is a .plan view of the same, with a portion thereof broken away for convenience of illustration;

Fig. 9 is a longitudinal section of the upper end portion of a still `further modification; and

Fig. 10 is a cross section taken on line 10-10 in Fig. 9.

I Referring first to the device shown in Figs. 1 to l. inclusive. l is atubular member or casing preferably cylindrical in form and desir-ably made of some transparent material, such as glass. At-` the upper endl of the member 1 is a sleeve or collar-like member Q preferably made of metal and encircling the upper end portion of the membei' l. but projecting above the upper edge thereof. The boreof the upper member 2 is enlarged as at 3. forming an annular shoulder l upon which rests a disk 5, preferably of metal which is loosely mounted so as to be readily removable and so form a vent member for venting the interior of the device. A cap 6 also desirably made of metal is preferably mounted upon the upper end portion of the sleeve 2. A fuse holder or container 7 is arranged at the upper end of the tubular casing l. lVhile 'this member 7 might be 1n various forms or shapes. we preferably make it in the general form of a plug having a body portion adapted to lit loosely in the upper end 'portion of the tube 1. and also having an annular projection or iange S adapted to rest upon the upper edge of the tube l. rlhis member 7 is provided with a bore or channel 9, inv

which one or more fuses 1010 are extended, said fuses passing substantially through said bore 9. The upper ends of the fuses 10 are secured as by soldering to a terminal 11 conveniently set in a small socket 12 formed in the top of the member 7, a connecting hook or ring 14 being secured to said terminal 1.1 and extended up therefrom and connected to a metal terminal disk 15 mounted on the top of the member 7, which disk is in turn connected with the metal sleeve or ferrule 2 by means of a flexible conductor 17, whereby said fuses 10 are connected at their upper ends to the metal 15 sleeve or ferrule 2 which is secured to the end flange 18 of a terminal clamp 19, which latter is adapted to be fitted into spring jaws or terminals of some ordinary or well known variety so as t0 connect the fuse device in circuit.

The lower ends of the fuses 10-10 are secured to a metallic terminal member 20 which extends downwardly vand has its lower end threaded at 21 and fittedv into a 25 metallic socket piece 22. A cross piece 23 passes through the terminal member 20 and has its ends embedded in the upper portion of a liquid director 24, which latter has a series of inclined side apertures or passages 25-25, and an upwardly taperingpassage 26. A s ring 27 is confined within the tubular mem r 1 and has its upper end secured to the socket member 22, whereby said spring normally exerts a downward, pull upon said socket member 22 and consequently upon the liquid director 24, and the :fuses 10-10. Aconductor 28 is also connected with the socketA member 22 and extended downwardly within the tube 1, it being understood that the lower end of said socket member is connected with the lower` end of the fuse device so that it may be connected to another terminal of the circuit and thereby connect the fuse device as a whole' portion of the errule 2 is desirably provided so as to afford a shield to prevent or stop the movement or development of arc vapor.

Thus it will be seen that in voperation when the fuses 10 -10 operate by reason of an overload current, the spring 27 will be released andl will contract, drawing the liquid director 24 downwardly and so separating the terminal 20 carried thereby from the dlsk terminal 15, and thereby forming such a long or wide gap as to prevent or reak an arc. At the same time the arc extinguishing liquid 33 with which the tube 1 is understood to be preferably filled, such liquid for example, as carbon tetra-chlorid, will be forced upwardly by the liquid director 24 and injected into the space vbetween the fuse terminals and so offer another influence tending to break or prevent an arc. The fuse container or holding member 7 which may be ofbakelite or other suitable material, is in the nature of an obstacle in the path of the arc or at any rate serves to restrict the arc to the small bore or passage 9 in said member 7, whereby a repressive and extinguishing influence is exerted upon said arc. At the same time this member 7 serves as a heat insulator to prevent the l spreader distribution of heat caused by the blowing of the fuse; and it will be further seen that the member 7 by reason of its substantial and solid plug-like character will limit lthe explosive action of the fuse or fuses and protect the adjacent parts of the device. 85

The vanes 30-30 tend of course to radiate heat and so prevent undue heating of the device and assist quick cooling of the same after operation. The arc vapor shield 31 serves its useful purpose as above mentioned. The vent member 5 and the memA ber 15 may be lifted bodily by the fuse explosion so as to vent the interior of the tube 1 and member 7 and associated parts, and thereby allow adjustment and equilibrium of pressure and prevent damaging results. VThe cap 6 may be secured firmly in position in which case the vent member 5 would be lblown against the same or said cap 6 may also be loosely mounted so as to permit it to be blown olf when the fuse or fuses operate. The vent member 5 is preferably soldered lightly in position so as to hold it against falling or being shaken out of place, but at `the same time with insuilicient strength to hold it against the operation of the fuse.

Referring to the device shown in Figs. 5 and 6, this device is similar to the one shown in the preceding figures, but this device of 11( Figs. 5 and 6 has two members 7a and 7", in place of a member 7 of theother device. The member 7a has the bore or passage in which the fuses 10-10 are extended and the lmember 7" has a central aperture 35 in 11! which the upper fuse terminal 14 is conlined, said member 7" beingpreferably secured to the underside of the vent member 5. The upper fuse terminal 14a is secured to and held in position by a terminal rod or 12( bar 36 whose upper end is supported by a bridge 37 mounted upon the top of the collar or ferrule 2. We have shown the lower end of the fuses 10 secured to a terminal 38 to which a cross piece 23 is secured, as in the 12: other device, said cross piece having its ends embedded in a liquid director 24, which is of suitable form having only the bottom funnel shaped aperture 26 without any side apertures. The upper ends of the spring 27 131 and conductor 28 are secured to the terminal 38 and the tube 1 is preferably provlded with carbon tetra-chlorld or similar liquid.

In operation this device is' similar to the other device, but in this device the upper member 7" will be blown out of and away from the rest of the device with the vent disk 5, the bridge 37 bein also removable by ha its ends solde to the ferrule 2, so aslaldle detached therefrom by the eX- plosion of the fuse. The other member 7a which is more properly the fuse holding or containing member, instead of remaining stationary as vin the other device, moves downwardly with the liquid director 24IB and so remains closer to the lower fuse terminal and receives liquid in its longitudinally arranged bore or channel. This emphasizes the arc extinguishing action, because arc extinguishing liquid tends to occupy and completely till the bore of said member 7.

-Referring to the device shown in Figs. 7 and8, t-his device has member 7 like the member 7 of Fig. 1 but has a bridge 3,7 similar to the .bridge 37 of Fig. 5. A vent 5 is provided as in both of said preceding figures, and a pin or rod 36 extends down from the bridge 37a to a fuse terminal member 14" in a manner similar to the arrangement in Fig. 5. The lower end of the fuse 10 is shown connected to a terminal 40 from which a cro piece 23 extends into a liquid director 24, which is similar to the liquid director 24 vof Fig. 1,'but has the members or portions 41 above the side passages 25 projecting laterally beyond the lower portion of the liquid director, as shown at 42, whereby said projecting portions or ends 42 tend to engage the liquid in their downward movement more largely than would be the case if they were liush with the remainder of the liquid director, so that liquid will be more effectively directed into the side openings V25. Thel device of Fig. 7 is provided with a shield 31 such as shown in Fig. 1. A clip or blade 19 is secured to the errule 2 as in Fig. 1, but below this is a metallic collar or sleeve 44 having a threaded connection with the lower end of said errule 2, thelower end of which sleeve or union 44 encircles the upper portion of another collar or sleeve 45 which surrounds the tubular casing 1, but has a layer 46 of gum or other suitable material interposed between it and the casing 1. Thus a tight connection or joint is made at the upper end ofA the device.

In the arrangement shown in Figs. 9 and 10 the construction is similar to Figs. 1 and v7, but the liquid director 24 is shown with a. much larger bottom opening 26 and smaller side openings 25u than in said Fig.. 1.

It will be understood that changes and modifications may be made without departing from the spirit of the invention.

What we claim is: j

1. In a fuse device, the combination of a tubular containing member, a movable pluglike device at one end of said tubular member, said plug-like device closing oil. the end of the tubular member, and being provided with a use bore or channel, a fuse lying in said bore or channel, a spring in said tubular member engaging one end of said fuse, and means for engagingv and supporting the other end of said fuse, said plug-like device being movable outwardly to relieve the pressure generated within the ytubular member when the fuse is blown.

2. In a fuse device the combination of a tubular containing member, a movable pluglike device at one end of said tubular member, said plug-like device substantially clos- 'ing off the end of the tubular member and being provided with an open use bore or channel, a fuse in said bore or channel, a spring insaid tubular member engaging one end of said fuse, and means for engaging and holding the other end of said fuse, said plug-like device and tubular member being provided wit-h coperating shoulders for engaging one another to hold the plug-like device in position, said plug-like device being movable outwardly to relieve the pressure generated within the tubular member when the fuse is blown.

3. In a fuse device, the combination of a tubular containing member, a plug-like device at one end of said tubularmember, mid plug-like device substant-ially closing off the end of the tubular member and being provided with a fuse bore or channel, a fuse, an end of which is disposed in said bore or channel, a spring in said'tubular member engaging one end of said fuse, and means for engaging the other end 'of said fuse to support the same, said plug-like device being provided with an annular shoulder adapted to engage the end of said tubular member, said plug-like device being movable out,- wardly to relieve the pressure generatedf within the tubular member when the fuse is blown.

4. In a fuse device the combination of a tubular member, a plug-like device at one end of said tubular member, said plugdike device being provided with a fuse bore or channel, a fuse in said bore or channel, a

spring in said tubular member engaging one end of said fuse,`means for engaging the end of said tubular member, said fuse device being provided with a fuse member, and said plug-like device having a bore4 or channel aording an outlet passage from the interior of said tubular member, a spring in sa1d tubular member engagin one end of said fuse, means for engaging t e` other end of sald fuse, and a vent member mounted at the outer end of said plug-like device opposlte said bore or channel, said vent memberv having a connection permitting its removal on the operation of the fuse.

6. In a fuse device, a tubular casing, a plug supported at the end of said casing and substantially closing off said casing, sald plug having an open bore therethrough, a non-fusible terminal member at one end of said bore, said terminal member being larger than said bore and resting against the top of the plug, a fuse secured to said terminal member, and a spring normally under tension connected to the false at the other side of the plug, said spring tending to pull said terminal member against the plug.

7. The combination with a fuse, of a holder or container for said fuse comprising a member of relatively hard material provided with a bore or passage for the fuse but appreciably larger than the fuse, means at one end of said bore or passage for drawing upon said fuse, means at the other end of said bore or passage for engaging said fuse to hold it under strain by said drawing means, a -venting member mounted adjacent the end of said fuse which is engaged and held in restraint, and a liquid director having an opening or passage for the direction of liquid, said liquid director being attached to said fuse adjacent to said spring, and a casing containing said liquid director, and also containing arc extinguishing liquid.

8.` In a fuse device, the combination with a fuse of a liquid director having a central passage and also having side passages for f the direction of liquid to prevent the formation of an arc. l 9. In a fuse device a liquid director havmg a central bore or passage'tapering at one end and also having side bores or paages opening into said central bore or passage and having an inclination similar to the tapering end of said central bore or passage.

10. A fuse device comprising a tubular member having one end provided with a movable closure containing a fuse, a spring within said tubular-member acting upon the adjacent end of said fuse, anda removable covering member covering the outer end pore tion .of said closure, said covering being lflapted to be removed by blowing of the se. A

11. A fuse device comprising in combination, a tubular casing, a plug member serving as a closure for one end of said casing and having a longitudinally extending bore or channel containing a fuse, a spring within said tubular casing engaging and acting upon the inner end 0f said fuse, a metal ferrule encircling the end portion of said tubular casing containing said plug member, said metal errule projecting beyond the end of said plug member, and a disk mounted removably for ventin purposes upon the projecting end of said errule.

12. A fuse device comprising in combina-V tion, a tubular casing, a plug member serving as a closure for one end of said casing and having a longitudinally extending bore or channel containing a fuse, a spring Within said tubular casing engaging and acting upon the inner end of said fuse, a metal ferrule encircling the end portion of said tubular casing containing said plug member, said metal ferrule projecting beyond the end of said plug, a disk mounted removably :for venting purposes upon the projecting end of said ferrule, and a cap member mounted upon and covering the projecting end of said ferrule. Y

13. A `fuse device comprising in combination, a tubular casing, a plug member serving as a closure for one end of said casing and having a longitudinally extending bore or channel containing a fuse, a spring within said tubular casing engaging and acting upon the inner end of said fuse, a metal ferrule encircling the end portion of said tubular casing containing saidI plug member, said metal ferrule projecting beyond the end of said plug member, and a disk mounted removably for venting purposes upon the projecting end of said ferrule, said projecting end of said ferrule having the end portion of its bore enlarged and said venting disk being tted into said enlarged portion of said bore.

14. A fuse device comprising in combination, a tubular casing having one end provided withV a plug which serves as a closure and contains a fuse, a metal ferrule surrounding the end of said casing containing said plug and also surrounding an end portion of said plug which projects from said casing, a sleeve rigidly connected with said casing below said metal ferrule and a second sleeve mounted upon and outside of the lower end of said metal ferrule and the upper end of saidv first mentioned sleeve, said second mentioned sleeve having threaded connection with said members.

In witness whereof, we hereunto subscribe our names this 22nd day of December, A. D.

EDMUND 0. 'SCHWEITZER NICHOLAS J. CONRAD. Witnesses.:`

A.,LrnA JONES, HAzEL ArJoNEs.

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