US1765165A - Tool - Google Patents

Description

PatentedY June 177, 1930 UNITEDSTATES A EISSU rnnnnnrcx Knosr'n, or Yorin, N. Y.

Toon..

Application filed March 12,*1928. Serial No. 261,159. i

This invention relates to lcutting instruments and'in particular .to a tool lon the order of a plier which is arranged to lsever the strand of an armoured ywire covering.

without injuring the wire. f

A particular Vobject of theinvention is to provide a cutter,'particularly adapted for f It is ,well known in the electrical art that .y the cutting of the BX or armoured cable` '15 heretofore, has resultedin the cuttingof the wires or piercing ofthe wirecovering which is objectionablebecause it exposes the bare wire and yprovides.. a possibility for short circuiting when the wire'hasvbeen placed in circuit.' y n A still further object of Atheinvention is Q provide a BX cutter in which a knife is positioned at substantially right `angles, to the convolution of the BX so that 1t wi ll completely sever one vof the vc'onvolutions and consequently permit the BX to be separated'with a minimum of effort. Dificulty has been encountered heretofore in the cutting of the BX due to spiral winding thereof and a further obj ect of my invention is to provide'an anvil or bed upon which the'BX is'placed so that it will be held in the proper position relatively to the cutter so thatthe 35 strand of the BX can be easily severed'.

To enable others skilled in the art to fully comprehend the underlying 'features of vmy invention that they may embody the same in the various modiications in struc- 4o ture and relationcontemplated, a drawing depicting a preferredform has been annexed as a part of this disclosureV and in such drawing, similar reference characters denote corresponding parts throughout,V all V,45 the views,of which, i Y Y Figure 1 is a view 1n side elevation showfV ing my' improved cutter.

Figure is a section taken on the lie of Figure 1 and illustrates how the 50 anvil is yprovided with a concaved seat having a l guide groove therein for the proper reception of the BX. v Y

-Figure 3 is V-a top plan view of the cutter, as illustrated in Figure 1,'a piece of BX-or armoured cable being shown in position ready for cutting. v v

Figure l isa top plan view of the anvil or seat showing the semi-circular receptacle formed therein for the holding of the BX and p Figure v5 is a structed after, the'same manner -as my 1mprovedy cutter, the same being. particularly'v arranged for `vuse as a wrench.;

Referringto thedrawing in detail, I5indi- Cates thev holder which` is made of heavy sheet metal or other suitable material'and i Y 260 modified view'ofA a tool con-` Y which. is substantially Ul-shaped in cross section, the Awidth of the holder decreasingl fromtheto'p 6 thereofv tothe lower Ved e7. The closed portion 'of the upper end o 'the holder is slightlI Aflared as at 8 to permit free operation o the Cutterarm`9,'this cutter arm being pivotally supported as yat 10 on a bolt 11 which passes through'the side wall of the holder 5 and' maintains therebetween in operable position, the cutter arm. The upper end of the cutter arm is bent as at12 to overhang one side ofthe holder-and is again bentv at right anglesl as at 13 to'said overhang'to provide a slotted, cutter carrying y'end 14,' the slot being indicated by the numeral 15 while the cutter itself is indicated by the numeral 16, thesame being held in the end V121 through the medium'of suitable'screws 17,V the upper end Vof V-the holder 5at its open side is arranged to re-4 ceive the supporting anvil 18. This anvil isv provided inv itsupper face with-an armoured cable receiving' groove of semi-circular f or-y mation,v the groove lbeing indicated byrv the numeral 19 `and being that the cutter 16 desired: toV cut rkone of the' convolutions'fo'f` provided centrally i with "an upstanding Yridge 20, the groove being disposed atan angle' relatively tto the would be substantiallyi'n alignment and' centrally thereof, that is, it vis v A' 10Gk v the BX or armoured cable and to have the knife enter it at its highest point. Therefore, it is evident that thekknife will have tobedisposed directly over the ridge 2O 'andirwill have to be central of the groove 19.

It is quite evident that the ridge 2O will fit into one of the spiral grooves Vofthe BX y or armoured cable 21 and will --be securely held in position so that the cutter 16v inay pierce bthe shell thereof. In order thaty the movement of the cutter 16 may be limited, it will be noted that the upper end'v of the cutter arm 9 is provided with a slight offsetv portion 22 which is arranged to engagethe l anvil 18 and consequently limit the down` vward vmovement of the cutter 16' so that the same will just pierce the shell ofthearmoured cable and will not crush the Vwires nor break the protective coating formed thereon. f y

j In Order that the cutter arm may beheld in position so thatffthe cutter 16 isV raised Vaway from the anvil, -Idiave providedbetween said cutter armand the closedside of the holder 5, a leaf spring 23 which is se- !cured vthrough'the mediumfof the VYrivets 24C to the-holder, the-free end thereof'normally urging thefcutterarm Q'to lreepthe cutter 16 in raised position4 relatively to the anvil.

j It is quite evident, therefore, that I have provided a' BX or armoured cablecutter which has few partsand one which permits v'the 'knife toV Abe removed therefrom for sharpening and'l for adjustment. 'Also, due tothe peculiar construction of the holder and 4the* cutter arm, vthe maximum effort can be exerted by one rgripping the lower end'ofthe cutter aringand the 'holder because the fulcruin provided rbyy the'pivot pin 10 being near the'point oflwork, will permit a greater leverage and consequently, more power.l

It is also evident that I have provided in y a tool of this characteran anvil Yprovided ywith aL groovewhichfwill hold the BX in the proper position relatively to the cutter so that one of the convoliitions thereof will bepierced without. danger of crushing or rpiercing the wire covering.

wrench, greater power may be exerted and also the necessity of adjustment of one of the jaws is eliminated.

It is evident, therefore, that I have provided a tool which is constructed of few parts, can be made up cheaply and can be used for a pluralitydof purposes.'v

VThe .lowerends of the `pivoted arms 9 v and 25 may be sharpened to provide a screw driver end, if desired.

" While I have illustrated and described'iny VUnited States Letters Patent is y i toolv for icutting spirally .wound.`ar iiioured conduits comprising a holder, lan anvilfin the holder having la`V transverse groove disposed at an angle to the'horizontal median line of the holder, a ridge, formed invention with some degree of particularity, I realize that in practice Vvarious alterations in Ythe groove vand arranged lto fit' between Y' the spiral turns of the conduit, an arm pivotedinthe holder and having a slotted endV overhangingthe anvil,- ai piercing tool in the slot, the tool being arranged tol cut one Y of tlieconv'olutions Aof, the conduit at a right angle tosaid convolution, and an anvilvenk gaging offset portion on the arm for limiting` the piercing movement of said cutting tool. y l l f In testimony'whereof I affix my signature.

.It :is evident alsothat inyicutter construction maybe arranged for vuse asa gripping vwrench and r*to this end, .as` shown in Figure Vvsa 5, Ihave employed a pivotedarin' 25y of similar constructionkpto. the cutter arm- 9. but

which iis arrangedat its uppersendltocarry Y the jaw 2G, the under side of which is -provided with the serrations 27which are-'arranged tol cooperate with the serrations- 29 formed on the fixed jaw-30 whichlisear` ried in the upper end of the holder 3,1. 1A

suitable'spring 32 cooperates with the vholder andrcutter arm to vmaintain the aws 26 and 30 iii-their separated position.'v j 2 rDue .to the construction .also 4of this

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