US1729880A - Fuse panel - Google Patents

Description

Oct. l, 1929. H. K. KRANTz ET AL FUSE PANEL Filed June 8, 192'? 2 Sheets-Sheet l WITNESSES: 5W@

TTORNEY Oct; 1, 1929.

H. K. KRANTZ ET AL FUSE PANEL 2 Sheets-sheet 2 Filed June 8, 1927 D 3 74 2 u A 2 M; 7 w m am Y 4/ 6 O O d u f a. 3 MEW 2 W vll 3f Y A 7 4 H, ,f 5 0MB y?, X2 HH 'Patented-.0a. l, 1.929

UNITED STATES PATENT oFFlcE i HUIBEBT IKIBANTZ, 0Fy BJOCKVILLE CENTER, AND HAROLD G. BAXTER, OF BALDWIN,

NEW `YORK. ASSIGNOBS TO WESTINGHOUSE ELECTRIC AND HANUFACTUBING COM- ENY, A CORPORATION OF PENNSYLVANIA FUSE PANEL A Application ined June 8,

Our invention relates to fuse panels and particularly to'fuse blocks of the character used in enclosed distributing panels.

Oneobject of our invention is to provide a panel block containing a plurality of fuse receptacles which may be assembled as a unit within a panel housing to provide any desired number of branch line fuse circuits.

Another object of our` invention is to provide a fuse panel block whereina pair of fuse receptaclesassociated with a load circuit are arranged in a horizontal row and wherein the fuses of a neighborhood load circuit are similarly arranged in a row parallel with the first row.v l A Another object of our invention is to provide terminal facilities for the fuse recep-v tacles that may be readily assembled upon the blockin such manner that they are separated by the distance required bythe Bureau of Fire Underwriters.

' Another object of our invention is to provide a fuse block wherein the fuse receptacle terminals are disposed in notches in the end of the block, in such manner that no part of the terminals project from the block, thereby preventing the conductors in the wiring gutter from engaging live terminals of neighoring blocks. I Y

These and other objects that will be made apparent throughout the further description of our invention are attained by means of the panel block hereinafter described and illustrated in the accompanying drawings, wherein;

Figure 1 is a plan' view of a panel housing' with the door removed and equipped with our improved panel blocks.

Fig. 2 is a transverse section taken on the line II-II of Fig. 1, showing the panel block in side elevation. y

F ig..3 is a bottom lan view of an improved panel block embodymg features of our invention.

Fig. 4 is a top plan view of the block shown in Fig. 1. f

Fig. 5 is a longitudinal section .through a block taken on the line V-V of Fig. 4, and

. Fig. 6 is an end view of the block.

Referring to the drawing, the usual panel 1927. Serial No. 197,389.

housin T comprises a sheet metal box or casing 7 hat is provided with a cover plate or trim 8 having a centrally disposed rectangular opening 9- usually closed by means of a hinged door (not shown).

In the usual panel construction the fuse blocks 11 and end blocks 12 and 13 are mounted upon Z-bars 14 that are 'secured to the bottom or rear wall of the housing, the blocks being secured thereto by means of screws 15. The bus bars 16, 17 and 18 are disposed beneath the blocks, and the terminal ends 19 thereof are covered by the detachable block 12. The insulating block 13 serves to cover the neutral bus bar 21 to which the return conductors from each load circuit are connected.

Referring to Figs. 3 to 6, each fuse block 11 comprises an insulating block having a recess 22in the rear or underside thereof, which communicates with passages 23 in the end walls 24 of the block. The end walls project beyond the rear face of the block to provide a space 2 5 in which the bus bars 16, 17 vand 18 are disposed and supported in a manner that will be hereinafter described.

Four pairs, 26, 27, 2S and 29, of fuse receptacle sockets 31 are provided in the front face of the block for receiving pairs of load circuit fuse receptacles 32 and 33 which are of the 'usual screw shell type for receiving screw plug fuses. The sockets 31, for the receptacles 32 and 33 are provided with openings 34 and 35 respectivel which communi'- cate with the recess 22 in t 1e underside ofthe block and through which terminal strips 36 and 37 extend into the recess, the terminal 36 extendin through the passage 23 and terminating afi acent the end ofA the block'where it is provided with an attaching screw 38 whichextends int'oa groove 39 in the end of the block.

right angles thereto and which is offset to f loo clear the insulating bushings 42 that are disposed directly opposite the sockets 31 for omissions may be made in the apparatus illusthe receptacles 32 and Which surround contrated Without departing from the spirit and ductor bushings 43 which constitute the censcope of our invention, as set forthin the ap tral terminals of' the fuse-receptacles. The pended claims.

bushings 43'are' insulated 'from the receptacle We'claim as our invention:

by insulating Washers 44.

This arrangement of the terminals 36 and sulating block having a pair of sockets in the 41 provides ample space betvveen theconducfront face disposed in a line extending longitor terminals and between the terminalsfl tudinally of'the. block andhaving a recess of neighboring feed circuits. Center termiin therear face of the block, the end Wall of nal bushings 45 are surrounded by integral the block being provided with a passage coniinsulating bushings 46 opposite the sockets 31 municating with the said recess, and the said containing the fuse receptacles 33. These vsockets being provided with openings combushings are insulated 'romthe'te'rrninal' 37 munir-:ating with the said recess, and fuse reby insulatingwashers 47. rThe conductor ceptacles Within the sockets, each having a bushing'sf43 andl4`5 are in the'forn of 'hollow "terminal 'extendin through the said open- 4"rivets'Wliic'h'are' peened 'over the ends ofthe ings'and through t 1e said passage 'in the end insulating 4bushingsand serve to lio'ld'the re- Wall.

infthe fusereceptacle terminals arerndered ."m'uni'c'ating Wit v'the 'said rece'ss','and

ceptacles 32 andi-i3' invasseinb'ld'posit'ion. f 2. fuse panel block. comprising an insu'- The bus barsl, 17 andlS are, as indicated lating block having a pair of sockets in the in Fig.`2, 'secured'in conductive cbntact with fro'nt face disposed in a line extending longithe inner iidsfthe 'bushings 43and 45 by 'tud'inally of the blockand having a recess in means of s t'revvs' 48 'that eXtend through the the rear face of the block, the end Wallof the bushings and are'threadedinto threaded holes block being provided with a passage conunuprovided in thebus bars, It Will be seen tingwith the said recess,"andtthe said sockets therefore thatfthe bus bars -are 'securely atbeing provided with openings communicat tached to the'insulatinfr bushings and that ing with the said recess, andfu'se receptacles this Voperation lmay 'bel p'erfforfined before the Within the sockets, each having aterininal exbushings are"'sect1red `Within the panel houstending through 'the said openings and ing through the said passage. in the end Wall, one

' eferring to Figs. 5"and 6, it Will be noted 'of the said terminals'being offset 'with respect that the terminal extensions 41 terminate in to the centerline of thesockets.

grooves'5,1 `ycili i ch c onstitutea'part'of the pas- 53. A fusel Ya'tielblo-c`k coinpirisingan insusag'es Q3 and'th'atthey'areprovidedwith at- Alat'ingblock av'ing'a' pair of sockets in the tacliing screws'52`having their'threaded ends front iface disposed in ailineextending longiextendinginto notches 53 in the end yvaIl. tudinally of theblock, and having'a recess in The insulating, block l1 provided ad-V the rear face of the block, the end wall of the jacent its endsfvyith'notches 54 yfor receiving v block being provided'ivith a passage commuthe depending'flange thatis carried by the nicatinfr with the said recess, and the said triin 8 and `which serve slto' preclude access to soketsbe'ing provided'with'openings comlnuthe Wiring gutters 56 at the sides and ends 'of 'nicating W'ith the said recess, and fuse recepthe insulating blocksthrough'the opening 9 tacles Within thefsockets,each'having a termiin thertrim,l 4 nal extending :through the said openings and As previously through ti'e saidpassage in the end wall, one

pointedout, noneof the fuse .receptacle terminals project beyond the end of :thesai tennals'being'difset with respect 1. A fuse panel block comprisin'g'an in? lll" 0f the blOCk ,Mld COIISQg'lleHilythe colidilCtOlS to thecenter linejof the sockets, 'and compris- 'Withillihe WIIIlg glitter, CiliiOifnglge eX- ing aliatmetalfstrip having its central porposed portions of the fuse terminals of neigh- 'tin bent ai; ififrh; angles toits end portions.

boring 'fuse blocks. 4. 'A fuse'panel block comprising an in- It will be .understood that Since the flll`se.,sul ating block having a pair of sockets'in the blocks are identical, any number-of, them may 'front face dispos aline eiitending lonbe provided in a fuse panel housing to accomgitu'dinally lof the" llock 'and 'having a recess modate any desired number vof 'load circuits, in the rear yface of theblock, the endytall lof and that by reason of the construction wherethe blQ'Ck being?,- rovided'vvith'-afpassaffe comreadily accessible when the trim is, reinoved, speketspeing pijqvidgd ighfbpjngs bomthewiri'ng'is greatly facilitated, aiid there iS f'inunicatingjuiththe sar recess,and fuserelittle or no danger ofshort-circuits occurring. cept'ac'les Withln the sockets, each having 'a y'llvhe construction is ruggedand inexpensive terminal extendinv through ,the said openvto manufacture 'and isrelatively compactl and, lings'and through the said passage in the end neat in appearaX104?.l N, j walho Le ,of the saidterminals being offset While We have' illustrated but one embodiwith respectitothe centerI l1n`es 'of the sockets, ment 'of our'invention, it ,willbe apparent to Vand conp'rismg ajiatmetal strip' having its those skilled inv the'lartthat v aripus changes, central portion bentjat right' angles touts end modifications, substitutions, additions and p 'r tte said maandag-sfeee'nd neared in a einem llfi plane from that of the free end of the other terminal.

5. A fuse panel block comprising an in'- sulating block having a recess in its rear face communicating with a passage through its end wall and having two pairs of sockcts arranged longitudinally of the block in rows and in side by side relation, each socket being provided with an opening communicating with the said recess, and fuse receptacles within the sockets, each having a terminal extending through the said open ings and through the said passage in the end wall.

6. A fuse panel block comprising an insuv lating block having a recess in its rear face communicating with a passage through its end wall and having two pairs of sockets arranged longitudinallyY of the block in rows and in side by side relation, each socket being provided with an opening communicating with the said recess and fuse receptacles within the sockets, each having a terminal extending through the said openings and through the said passage in the en'd Wall, center terminals within the receptacles and insulated therefrom and extending through and surrounded by the material of the block and terminating exteriorlyI of the rear face of the block, the said first said terminals of the receptacles remote from the said end of the block being offset toward the axis of the block and extending between the center terminals of the receptacles nearest to the said end of the block.

7. A fuse panel block comprising an insulatin block having end walls projecting from the rear face of the block to constitute supporting legs therefor and having a recess in the rear face communicating with passages extending through the end Walls, the said block having two longitudinal rows of sockets having openings communicating with the said recess, receptacles in the sockets having terminals extending through the said openings and terminating in the said passage in theend walls. center terminals within the receptacles insulated therefrom and extending through and surrounded by the material of the block and terminating exteriorly of the rear face of the block, the irst said terminals of the innermost receptacles being offset and v extending between the center terminals of the outermost receptacles.

8. A fuse panel block comprising an insulating block ,having end walls projecting from the rear face'of the block to constitute supporting legs therefor and having a recess in the rear face communicating with passages extending through the end Walls, the said block having two longitudinal rows of sockets having openings communicating with the said recess, receptacles in the sockets having terminals extending through the said openings and terminating in theA said passages in the end walls, center terminals within the receptacles insulated therefrom and extending through and surrounded by the material of the block and terminating exteriorly of the rear face of the block, the tirst said terminals of the innermost receptacles being offset and extending between the center terminals of the outermost receptacles, the said center terminalsbeing adapted to en` gage the feed conductors or bus bars disposed beneath the block.

9. A fuse panel block comprising aninsulating blockhaving a recess in. its rear face communicating with a passage through its end Wall and having two pairs of sockets arranged longitudinally of the block in rows in side-by-side relation, each socket being provided with an opening communicating with the said recess, and fuse receptacles within the sockets, each having a terminal extending through the said openings and through the said passage in the end wall, the said terminals of each pair being disposed in different planes.

In testimony whereof, we have hereunto subscribed our names this 28th day of May,

HUBERT K. KRANTZ. HAROLD G. BAXTER.

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