US1003673A - Electric fuse. - Google Patents

Description

J. A. TORNQUIST- ELECTRIC PUSH APPLICATION FILED JUNE 2 2, 1911.

1,003,6'7 3. Patented Sept. 19, 1911.

WMM/woon ML 771W 1 TES PA JOHN A.. TORNQUST, OF DAVENYORT, IOWA.

ELECTRIC FUSE.

Leeiie'ie.

Continuation of application filed March 29, 1910, Serial No. 552,259.

Specification of Lenerfs raient.

.ilntented Sept. il?, Miti.

This application filed Tune 22, i91.

. Serial No. 634,669.

! :ait/ whom it mary concern:

le it lmewn that l, dem: A.. rllonrcniis'r, :i animen ot the United States, residing nt i l.) wenport, Xenia, lieve invented certain new :ind useful linnovei'nents in Electric Fuses, et whieh the followingl is :iy specification.

'.lliis invention rela-tes to iniprovenients in elec-trie fre/les, this zipplieiition beingn continnzition of my application for patent filed flllnrch 29, 910; Ser. No, 552,95).

The ninin objects oli thin invention. nre:

the eneneie harte of which may he used re pez wily.I the fuse element proper :and ite` inelofs fr ng' or Carton being quickly new Sen'dileci with, er disassembled from the other il it the effectiveness; of the t'nee cannot he Jdestrn'iyed by the unauthorized changing et the fuse elen'ient. Second to n'ovide :in inil l a 7 Q proved electric tulle winch is very innnle :uni

.economie-el in fst'riml-niew and. :it the ,winne time, one which is ve 1 eliective.

.Furtheriolijects and objects relating te etrueturnlV Vdetails, will definitely appelli" "in the accompanying dine/ing, ifn'nling e part of this specification, in which:

Figure l is n side elevation, partially in iongitudinzilsection. on n line .correspoiulinn to line l-ml ot Fig. 'il ot my inn'iroved elec-- fi. t)

trie frise. Fig. il is n longitiulinnl section on n line corresponding to line Bm-2 et Fig.

, l, the rivets t3 'tor securing the time elemente` in the easing' er e'nrton being' Shown in full lines. Fig. IU. is u, i'iersi'ieetive lview ot one of the terminal caps. Fig. lV is n penalmetive viewof the fuse element und its inelmsing easing or Carton disnssen'ihled troni the oeps. Figi V is n pien View ot' one et the disksil.

In the drawing, Similar numerals; of reference .refer to Similar pin-ts tlwouighout the several views, and the section-il views are taken looking in the direction of the little arrows zit the ends of the section lines.

Referring to the drawing1 i represents the "inse block or linee on which :ire mounted rei?, to provide on improved electric fuse,

Darts, and being permanently eoi'ineeted so nilient line terminals 2 for the circuit wires in wliieli the infie interposed. terminals are oi1 the blade-switch type, lieing` t'ornicd ot resilient material and dieported in eimetiiig; pairs to receive the ends of the tufee element l und the tese terminals 5 hetween theni, :is illustrnted.

The tnse eleu'ientl tie torined of ny thin strip of suitable nietnl oit uniform thickness, but enntrneted or reduced :it n centi-:d point ne et (l. so that when the linee is blown or disrupted.. it ie disrupted et this centrali point within the casing' T. The mining "l is a cylinder ot euitnlile insulating materiel, pret ei'nlily of liliei' in' impur in.' like mnterinl, which found not onliY eitective for the purpose. init ehenn :n1-d Streng.

rthe fuse element t, is arranged cent1-All)Y through. the rzieingij to pro-ject 'troni both endK thereof. und is perlnniufntly Secured therein hy :nenne` et the rivets Si. whieh nre nrmnged tln'nugg'h the fuse element und the cilinder :it eneh end. '.llxe ends ot the cylinder nre ineiueefl und the tune element supported nggninst interni uun'enient hy niezinS et the clelia if), which :ne slotted nt l't to re eeive the l :use element. 'the disks l) :ire :in rnngcd :it ench end et the eviflindei.' on the inside et the rivets il, en that ,the disks nre retnined hy the rivets, ze; well ne the fuse elements. ily the: Simple nrrnnggement, the

fuse elemente nre )ieruinnently supportednnd retnincd in their eentriil positions; in the miningijsf: tlmt in. they' cannot vhe reinoi'ed or ehnnged withonl the deeitruetion er inntiln.- tion otf the parte. 'This if; of Very .great :nli rnnlnn'e, ne nl" course, the [nn-nose ot n fuse is to prevent the pziesnge et en excessive current. :and where the tufee element enn be 'readily elning'ed, cnreleh'fs #workmen trequentl'iI euhetitute new l'ufee eleniente` oli unknown capacity, so that the inse, instead of heini; n safety devine, is n nnnnce ns it may enrry n much larger currentI than the lznnps or the inziehinery which it is Supposed to guard nre adapted for.

the terminal cups Il() :ire sleeved over vthe ends et the casing; 7 the lerniiinils The line ment being directly in contact with one of the line terminals ateacli end.

The casing is effectively supported by The caps are freely removable,

casing inserted. It is vmy intention that the fuse element and its inclosing casing, as shown in Fig. IV, shall be furnished by the manufacturer so that the terminal caps can be used repeatedly. This results in a great saving to the'consun'ier, as the terminal caps are the expensiveparts of a fuse,-- that is, they should be made of metal and be uninjured by lthe blowing of the fuse. Another advantage of this construction is that in the the 'fuse element cannot bev renewed b y a careless workman or an unauthorized person without destroying` the carton, or without such mutilation thereotl as will make it .obvious that' the fuse element hnUY been tampered with. 'flic fuses, as assembled by the manufacturer, are, of course, )roperly measured as to their carrying capacity and the capacity is indicated upon the fasing.

Ventilating openings 1Q are provided in the. caps l0, and the disks 9 are provided with ventilating openings 13.

I have illustrated and described my invention in a very satisfactory embodiment thereof, which is simple and economical in structure and possesses the advantages sought.

I'am aware that certain variations in structural details are possible without .departing from my invention, but as such variations will no doubt be readilyunderstood by those skilled in the art to which this invention relates, I have not illustrated or described the same herein, but desire to be understood as claimingthe same specifically in the form illustrated, as well as broadly within the scope of the appended claims.4

Having thus described my invention, what I claim as new and-desire to secure by Letters Patent is:

l. A fuse device comprising in combination, a cylinder of insulating material, cylindrical. metallic caps for the ends thereof and place the event (if the blowing` of the fuse,

having slotted perforations through their ends and integral terminal blades extending therefrom, al relatively thinfblade-like fuse I' -proper and saidinsulating cylinder' and lying under each of said caps. 2. A fuse device comprising in combination, a cylinder of insulating material, slot# ted insulating disks at each end of said 'cylinder, a relatively thin blade-like fuse element extending tl'irongh cylinder and slots in said disks and beyond the ends oi said cylinder, and pins taking through said cylinder and tuse element between the ends oi said cylinder and the respective disks.

3. A fuse device comprising in combination, a cylinder of insulating material, slotted insulating disks in cach end 'of said cylindcr, a blade-like fuse ,element extending through said cylinder and the slots in said disk and projecting beyond the said cylin- -der, and pins arranged through said fuse element and cylii'ider. the said fuse clement being secured to said cylinder and sup ported against longitudinal movement by said pins and against lateral movement by said disks.

l. A fuse device comprising inl combination, a conmlcte cylinder oit' insulating material, a relatively thin blade-like fuse element arranged centrally in said casing to project from both ends thereof, means for permanently supporting and securing said fuse element at both ends of said cylinder, and cylindrical metallic caps for the end:A of said cylinder having slots through which the ends of said fuse element project, and blade-like terminals extending therefrom, said terminals .being disposed at the sides of the said slots and being parallel with the projecting ends of the fuse element, said caps and fuse element being unconnected, said capsbeingl. freely removable from the said casing, for the purpose specified.

In witness whereof, I have hereuntoset my hand andv seal in the presence of two witnesses.

JOHN A. Toi-iNoUisT. Y [as] Witnesses AUGUSTA Pnsoiin, MADGE M. MARriNnLLI.

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