US1299132A - Renewable fuse. - Google Patents

Description

F. N. CONANT.

RENEWABLE FUSE.

AIIPLIQATIQN FILED III/III. 9. Ism.

` lPatented Apr. 1,1919.

i To all whom it ma UNTTED STATES PATENT canton,

IBANKLIN N. CONANT, F NEWBURYPORT. MASSACHUSETTS, SSIGNQB, T@ CHASE SHAWHUT COMPANY, 0F NEWBUBYPORT, MASSACHUSETTS, A COBPMT Ella RENEWABLE FUSE.

concern: Be' it lmown vt at I, FRANKLIN N. Co-

I 4NANT a citizen of the `United States, and

a lresldentj'zo'f'Newburyport, Vcounty of Essex, and State-.of Massachusetts, have -in'- vented anIin -iiiffe of which-the ll'owing is a s" eciiication.

My invention relates to inc osed fuses of the cart-ridge type,having knife-blade contact blades and'particularly has, as an object, to provide a structure of such strength that'repeated renewals can be made wlth 'a minimum of deterioration, and so sim le Vand easy to, assemble that any. unskil ed user can renew; the fusible elementeasily,l

accurately gandwithout tools.

My inventionhas other advantages which will be apparent to those skilled in the art, from the mere examination of the drawin in connection with the specification not t e least of which advantages is the act that nal 3 vlocks 'the terminal platea 5' a person skilled inthe manufacture ofsuch articles can make the structure at a remarkably low cost, considering the massive charl acter of all portions bearing 'a strain:

' In the drawings, Figure 1 show'sln side elevation vand partialrsection a fuse made.

in accordance with my invention.

Fi 2 is an end view of the fer-rule showin t e inwardly "extending liange. @i 3 is a plan\view of one of the termiates. 4 is a lan view of the plate which inst rotation. Fig. 5 isa plan view o 4a washer. Fig. 6 is a. lan view of the late formn the slotted) end portion of t e end cap. ig. 7 is a erspectiveview of the end. ca with the s otted end plate removed. v Illig. 8 is a perspective v1ew of @edificaton of the tubular portion, having the inwardly extending flange.

Fig. 9 is a plan view of embodying my invention.

'In this specification, the word v fuse 1s a vfusible element used to include not only the fusible element,

'l represents' the tubular fibercasing and 2 a metal tube or ferrule permanently fastened thereto by screws 3.01' other suitable fastenings, said tube-being exteriorly screw Specification of Letters Patent.

ment in Renewable Fuses,

mg ange 4, which engages and holds the knife-blade Contact plates 5 a ainst movement, both longitudinal an rotational, when the en'd ca is in place, as hereinafter pointed out. his inwardlyv extending iiange (see F1g.2) has a central opening wluc-h 1s WideA enough one way to receive thev full width of the terminal contact blade 5, while at another portion the opening lsjtoo small to receive the entire width of the terminal blade 'against longitudinal movement, as hereinafter described. By preference I make the opening in the inwardlyV extending ilange '4 circular vexcept for diametric notches 7 at one portion. The notched portion 7 should rovideI an o ening to receive the entire width of the b ade 5, wh-ile the opening elsewhere is narrower than lthe main body of the blade 5, but slightly wider than the blade at the notched portion offsaid blade. The terminal blade 5 is provided with notches 8 in its edge, preferably two opnositely placed notche and it will readily be seen that the termina blade ma?I be slipped throu h the notches 7 in the ange 1 of the ferrule 2, and when flan e wil enter the notches 7 and the kni e-blades 5 will be held very firmly against longitudinal movement by the abut@ ments 6.

In order to lock the knife-blade plates in this vposition against rotation, I provide a late 9, having aslot 10, which iits thelmifelade 5 and 1s provided with a prot-uberance or'protuberances 11 which enter the notches 7 of the inwardly extending ange, as shown in Fig. 1, and are held firmly against rotation by the walls thereof. Means for preventing venting) of the metal vapor formed when the fuse lows, of any desired character, may then if desired be placed 4Patented Apr. i, il. Application led March 9, 1918. Serial No. 221,344. l

uarter circle'the walls 6 of the around the knife-blade, for instance, a slotted l leatherwasher 1'2. An end cap 13, screw threaded, and preferably having a separate slotted plate 1l which forms thejend portion is then screwed over the tube 2, thus in any desired manner and may consist of any proper material or of any desired con-= threaded and having an inwardly extend- '-guration, In the drawings 1 hwgshown y mende-m, in which, in place el? e fernee e ubule'f meel' pueden i8, perefmeeeol 'fee the lmfe'fier ef the tending bevond 'elle seme rise exeasen l@ beleg es bed The of 'elli v melee-5 pmezieeble and *elmfeeel elf ehe total "ee fi, 'wmlneulz A, efe eomseinmg levemiem been L? @e end @epe 'lll eee me- .Seewed end elle eeemeels turned e quarter eem, se es 'te eeeupy elle meedeed peten ef l ages 39 when 'elle f'eemlnels een lee "e 'fuse cese sleetlld be ao remove-e9 se pee- .,e by previene se new fusible element bebe/*eee :lle emlmls in ienne?? es byvuneeewing ehe lube mgmens the elle terminal? end esble element., This 'eomblneel steueeure, fmfieely7 the two esllele elemem; luetween lueugh like n'oches Hnge uml elle seminal blade eeg i ef the llenge l., efe e, @mariee "Quel placed over (me -s les pfefsulemnees stef Wil the :notches reeling The the plee M are elle@ eten wel the enel eem-Weel n Le elf ene eee-awe eesembled in like mennen The intende? 45 the fusible case meg, if desire, loe llel Willi the usual 'fuse @lling materiel, such as gfound sulfate of eeleium9 sleked lime, er other suiieble materiel, either im Whole 01 in in elle manner.

ne fusible elemenl, l@ is formeel of e strip ezhez" easily fusible meez'iel and e plueltjf ef lenqitednel Filets 20 Miele divide lille uelele element inte of easily illisible pee-biens 2L Q0 we Ee '.i'vely saggerec'l enel @all easily fusible pommes we 'thereby "e'wne Wgl more easily :fusible @melone Q2 eli eieggesteel in respect lie each other enevebj/ eel'ie'elze. he fue-ing 'periene when we blows,

le eeft een cemled in sei@ easing Sleee and elle @ber enel is thenelelm: VS l. lin en ele-Cirie fuse, melee." having e faermimel wellen? e perien having en mwmfdly er willi a. recess lleee? e ersmmel l men with said lauge fee ifea lemgudnel 'meemen im eel@ e end plaie engegealele *QN l pluie having ze pejeelem wiel?. the l'eeess in seid Hnge, te pee-vent "me- 'ienel movemeue ef smicl fermeel plete? and im end cap detaclmbly eemleeeeel wll eanel terminal pertiee le leek said ibelmimel blade in peson.

2 le en eleeh'e fuse, e eyllmleleel fiber cese having; exlerolly '-eleaeleel .metaal if rules ai each. eed thereof, effelee' le inginmiu'clly exeenelmg flanges with elimme 'iemoehes lerein mclapiecl le receive e lee mm lelacle7 e terminal blade .having epee site moellee in 'elle edge lille/reele edepeeel te he inwardly exlaeneling wells @nl Seid zmge and be held theeby against longiludll nal movement, e leelengg-plate adepte@ te engage saicl emeluel lvl emi eefll enel pevem rotational esf'emeee minal Mada', enel el eey@ eerewallreedeel meel @emplee-'l leek ed plete enel faeemmel leleele le eleefge lese, shell ee ease eem prisng e tubular lJ-ely piel and metal 'mees ite 'fu-lee @nel thereof, seid Knevel cubes labeling exeeee screw-'tlmeedecl enel veeelve 'eeieely serew-'lmeedel @nel eme fzleeeen9 e .W5 @enge emenelimgf; l eeel. mbe. having em. epem r l l the locking-plete im posit-leze? sulbe'eeaelly 35.6 as desezibefl.. v

:flamed te feeeive imererly sereW-"fh'eeeil enel mp9; themen? a Hnge ezienclng iuwauf'flly 'enl each mete-l tube hevng am opening 'berein ademe@ .le 'eeeve e *Lerm* nel blade at one pereee e Mfiel @peeing eme at another portion being provided with an v.

abutment adapted to fit notches in the terminal blade and bold said terminalv .blade aga-inst movement lonn'itudinal of the oase; e terminal blade having notchesl there,- in adapted to engage said abutment, a metal locking plate havin a. slot therein adapted to fit said terminal bl flanges and 'engage vthe Walls of said anges so as to prevent rotation of said plate and the terminal blade, end an end cap adapted to be screwed upon said metal portion and hold the locking-plate in positionLsubstanf tially as described.

5. A renewable fusible element for elec- .tr fuses consisting of a strip of readily :element betvveenfit ade and protuberances adapted to enter a Wide portion of said .TQ A yrenew able lfusible .element for eleoti'ioffuses "consisting, of -afstrip or fusible nietel'rhavinga plurality of readily fusible portions'arranged inv staggered relation, seid readilyffusibleportions being longer then Q the combined integral lportions of the fusible sjterminals. f

lfi8r. An] inelosedl electrie fuse j 'of the oar- "tridgeiftypejfcoinpri'sing;aninclosing casing #of liber "having, .terminal Contact portions v'and a fusible 'ele'.r'n'ent therefore' comprising a .strip'offusible vmateriel having ya plu rali'tyfovlon'gi'tudinal slots therein forming a plurality'oireedily fusible portions lieving theirmost fusible portions in staggered relation, to seid terminal contact l1 'i portions.

.In testimonyW-hereof l lieve sime I' name to thisv specification in two subscrlbing Witnesses,

FRANKLlN lill il@ lVitnesses:

H. B. DAVIS, T.- T. Grmmlvwoon. l...

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