US986744A - Electric cut-out. - Google Patents

Description

T. E. MURRAY.

ELECTRIC GUT-OUT APPLICATION HLM) 0012), 1910.

Patented Mar. 14, 1911.

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ELECTRIC CUT-OUT.

APPLICATION FILED ocuxz, w10.

Patented Mar. 14, 1911.

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T. E. MURRAY.

ELECTRIC' CUT-OUT. APPLICATION FILED M1225, 1910 `Patented Mar.14,1911.

3 SHEBTQ-SEEET 3 ease is preferably filled with cornininnted UNITED srnfrpsigrnnr onnion ELECTRIC CUT'UT.

986,744, Specification ot Letters Patent. Patented Mar.. 14, 1911.

Application tiled October 25, 1910. Serial No. 588,954. i

To all whom it may conce/m: parts, namely, the buse block A., the inse .Be it lrnownthat'l, THOMAS E. MURRAY, ease B, and the plete C which' supports the n citizen of the United States, residing at l fuse ease and also forms :i @over for the New York, in the county of New York and block, and which provided on its under Stzite'of New York, have invented a certain side with live plngs'whieh respectively enter new and useful Improvement in Eleetric suitable sockets insnid block. p Cnt-Onts, of which the following is a, speer l The bloeit A is integinllir formed of nor-- cation. T f eelein or other refractory insulating mn- The invention relates to electric ent-outs, l terial. "ltJ has four soolets, l),E, F, Gr. Fig'. and consists in the construct-ion hereinafter l 2, eeoli ol which communicates with en set forth, whereby the apparatus is more lopening' in the end wall of the block. ln especnll)7 adapted to heavy enrrents. t seid sockets are metal bottoni plates il, l2, The fuse case is formed of sheet metal, 13, 14, which have prolongations 3G extendsuchI es iron or steel, and is mounted upon l ing through theopeningsin said end walls, the upper side of the Cover of the bn se block, l Each plate has side portions bent niiiwerdly the said cover and base block being of por to forni spring clips, ns shown at H. To eelnin or similar refractory insulating inetlie bottoni plates ll and l). may be conterial.. 0n the bott-oni ofthe cover :and neeted the terminals of' the positive con preferably integral therewith are plugs prodnetor of e, three wire system by means of vided with contacts which enter recesses in suitable clamping screws, es shown at l5. the base block and establish circuit. through To the plntes 13 and lll, in like manner, may the fuse or fuses which extend through. seid be connected the termina-ls of the negsitive of the block and beteren the tour sockets xninals of s three wire system. The inse described is another socket l which @onimul plugs, @over and @use t0 the Conductor terconductor ot sind system. ln the middleI l l 1 refractory insulating material, and ,may oonnicates with n passage 'on the under kside tuin :i partition between the-fuses, so that O the blOCk, ill which ueplced two metall ezieb isproteeted from injury by the bienvm Strips i7, i8, Fig. tl, the ends ot which are ing) of the other, bent np in seid socket to form clip arms J. lli the accompanying drawings-Figure l. The strips iT and lil ere received in s. recess is n longitudinal section of niy improved lv On the lower side oit the block andere out-Out 0n the line l, l of Fig. Fig. 2 en red in plnee by the conntersnnk bolts Ll, isn plan view, witthe fuse ease renioved, Fig. 3. 1 i-tlit thaese strps are inserttel, .a l j) r -3 2 Q L s 1- and t1, Whole devn Fig 5 is a plan View 01; I Figs. Elend 5, which through the strips the bottom of the base block. Fig is t and enter the body of the bloclt. The ends cross section on the line 6,6 of Fig. l of the Strips 17 and '1,8 extend through T o. plan view of the top of the bottoni openings in both end walls of the bloei; und of the metal :fuse ease. Fig. S is n plan View lare provided with screw connections similar of the porcelain cover plete which enr-ries to l5, so that the terminals of the negative the plns pd intbelrprlisedbetwqeen the inse l b It i t u t i l ense an` e ase oe Hq. is nn edge l tins e eonneeet o ie exreinities o son` view of said cover plate eiid plugs -inte-` strips. The covering plete C is also made ot' grally formed thereon, and Fi l0 is a, porcelain, and is provided with four plugs, cross section on the line l0, 10 o Fig. l. L, M., Q, B, (R not shown) which enter imiln 1nninbeirs und letters ot reference ,l d1 1- S V h t he I, T in' lente ire "nr 1s. e n wnc en ers soo 'e ,iese The (levied) comprises three principal l plugs) arge formed integral with the'` plate C.

conductor of seid three wire system may respectively sockets D, E, F, Gr, and a niidinserted in On the bottom of eachplug as L, Fig. 1, is a metal contact plate 22 having two sides 19 bent up and secured by turning the extremities thereof into notches in the plug, and two sides 23, also bent up and lying against the plug. Through each pair of plugs, as L, M, Fig. 1, extend the legs of a fuse strip. There are two of these fuse strips,l N and O. As shown in Fig. 1, the end of the fuse strip N is connected to the contact plate 22 and is arched over above the plate C, and its opposite end is connected to the similar contact plate of plug M. The passages 9, Fig. 8, in the plugs through which the fuse strip N passes, are made somewhat larger in cross sectional area than said strip, and after the strip is inserted, these passages are to be filled with plaster or similar material.. The fuse O which isin the other pair of plugs is conneeted to them in the same way. The bent up portions 23 of the bottom plates extend nearly to the tops of the plugs, and enter the spring clip arms H when the plugs are place in the sockets D, E, F, G, I of block l On the upper side of the late C and directly above the four plugs M, Q, R, are four projections 24, 8, which enter openings in the metal bottom plate 25 of the fuse case. Said plateis bent up on two -sides to form the semicircular side wallsI 26 and 27 of the fuse case, and on its two remaming sides 1t is langed for a short dis'- tance upward, as shown at 28, 29. A middle partition 30 of the same shape as the side walls divides the case into two compartments, into which enter respectively, the fuses N, O. The fuse case is closed by a semicylindrical cover 5 which is flanged over the semicircular sidewalls, asA shown at 7, Fig. 4E, and is secured by bolts enterin the fianges28. After the plugs are inserted in the sockets of the block, the plate C carrying the fuse case covers all of the sockets in said block. In order to clamp together the parts of the block, I provide a swinging bail 32, pivoted in lugs 33 secured on the upper surface of the block, which bail when turned down allows the fuse case and plug plate C to be removed together,V

but which when turned up, as shown in Fig. 3, enables said fuse case and plate to be tightly held in the block by turning down the clamping screw 34 which passes through t .e horizontal upper part of said bail.

The fuse case B is to be filled with any suitable comminuted refractory material, in which the fuses become embedded.

In order to make close contact between the bottom plates on the plugs and the bottom plates 11,12, 13, 14 in the sockets, I form recesses in the body of the block immediately below each socket, as shown in Figs. 1 and 6, which recesses I may fill with any suitable cement Whilethe cement is still plastic, the plates 11, 12, 13, 14 are pressed down upon it, so that when the cementsets the surface against which the plates rest closely fits them. The upper edges of the contacts H are bent outwardly and sprung into recesses T in the .sides of the sockets, as shown in Fig. G. This enables said plat-es to be held in .said sockets without the use of fastening bolts entering said sockets. In first assembling the parts, the clamping screws 15 may be released, thus leaving the clips II free to turn slightly in the socket to titaccurately on the plugs, after which thescrews l5 are set up.

I claim:

l. An electric cut-out comprising a base block, a fuse case, a detachable cover for said block disposed between said block and said case, contacts respectively on said base and cover, and a fuse 1n said case connected to said cover contacts.

2. An electric cut-out comprising a base block, a cover therefor, a fuse case on the exterior of said cover, plugs on said cover entering sockets in said block, contacts on said plugs and in said sockets, and a fuse extending through said fuse case and plugs and connected to the contacts on said plugs.

3. An electric cut-out .comprising a base block and a cover of refractory insulating material, a fuse case of metal having its bottom plate secured to said cover, plugs on said cover entering sockets in said base block, contacts in said sockets and on said plu s, and a. fuse strip extending through sai fuse case and plugs and connected to the contacts on said plugs.

4. An electric cut-out comprising a base block and a cover of refractory insulating material, a fuse case of metal having its bottom plate secured to said cover, projections on the upper side of said cover entering openings in said bottom plate, plugs on said cover entering sockets in said base block, contacts in said sockets and on said plugs, and a fuse strip extending through said fuse case, projections and plugs, and connecte( to the contacts on said plugs.

5. An electric cut-out comprising a base block of non-conducting material, a semi-cy lindrical fuse case of metal having its loot-V tomwall secured to said cover, two pairs of plugs on said cover entering sockets in said base block, and contacts in said sockets and on said plugs; a fuse strip extending through said fusel case and to one of said pairs of plugs and connected to said contacts on said .plugs,`a second fuse strip extending through said fuse case and to the other of said pairs of plugs and connected to said plugs; a' fifth plugon said cover entering a separate socket in said base, contact terminals in said socket, and a circuit closing contact plate on said fifth plug.

6. A base having a socket, a, bottom con. In testimony wheeof hav@ afixed my tact plate having upwardly extending spring signature .in presence of two wnesses. clip arms engaging in recesses formed in i l 3,1, said. base, a prolon ation of said bottm THMA'S E *''JL'RE `plate extending outslde of said socket, and Witnesses:

means fm' detachbly securing said pro- GERTRUDE T. PORTER,

longati'ou to said hm, i MAY T. MCG'ARBY.

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