US2539294A - Tool - Google Patents

Description

Jan. 23, 1951 W. A. BARN ES TOOL 2 Shee'cs--Sheefl l Filed May 2l, 1945 gig/- 2 INVENTOR.

MM5 MMF Jan. 23, 1951 w. A. BARNES 'rooL 2 sheets-sheet 2 Filed May 2l, 1945 IN V EN TOR.

BY [4.6M

27' .5 M 1x7 Wm Patented Jan. 23, 1951 `TOOL William A. `Barnes,xUtica, N.`Y.,.assignor to 'Utica .Drop .Forge & TooliCorporation, a corporation of New York Application May 21, 1945 Serial No. 595,009

'3 Claims.

' My :invention relates in general 'tohand operated tools and more particularly to hand operated tools having -a mechanism for producing a relae Itively large working force for a relatively small amount of pressure applied to the handles of the tools.`

An object'of my invention is the provision in aihand operated tool of avmechanism yfor producing a -relatively'large working force for a Arelatively small amount of pressure applied Ito `the vhandles ofthe tool.

Another object o1 `my invention :is Vthe `pro- 'vision :in a hand 'operated -tool of a lever mechanism 'which produces V-a large mechanical advantage for applying a relatively large working force tothe jaws of 'thetool Another lobject `of rmy invention is 'the :provision of `mounting Vthe lever mechanism substantially. Within the'handles of the tool whereby externally projecting lparts are eliminated.

Another object of my invention is wthe provision of employing the Shanks of one of .the jaws of the tool as a reaction element against which the lever mechanism operates for apply ing a working force to the other jaw of the. tool.

Other objects and a fuller Aunderstanding .of my invention may behad'by referring tothe folt lowing description and claims, taken in vconjunction With the accompanying drawing, in which-t Figure 1 is a side elevational view of a lhand ltool embodying the features of my invention;

Figure 2 Vis an end view Vof the tool shown .in Figure 1;

'Figure 3 is a cross-sectional view 4taken along the line 3-3 'of Figure l;

Figure 4 Vis `a diagrammatic view illustrating my hand'tool'wth the 'handles shown in the open position;

` Figure 5 is a modiiied form rof a-'tool'having the lever mechanism applied to but one side of the tool; and

Figure 6 is a diagrammatic vview `of Figure 5 Showing the handles in their open position.

`Wth particular reference to Figure 1 of Vthe drawing, ,my hand operated toolcomprises two laws I ,ligand I I adapted to be operatedby handles 22,:,and' ,23, The jaws, as illustrated, are provdedgrespectively with recesses I2 fand )Shaving cutting edges `adapted to cut cable or 'any other :element of likenature. It is to'be clearly understood that the jaws of my hand operated `tool maybe oir any particular type andare 'not limited totlie ',typegshown which may 'be used for cutting 'a'zcable-or 'other 'like element'. A*The jaws HI vand f1 I0 :by `means of pivot means .23.

I vvI have 'shanks I5 and I6 respectively, and are pivotally connected together in a crossepivotal relationship lby means of a main pivotal connection I4. The shanksa'nd the jaws are of one integral-piece whereby when the Shanks are operated the jaws yare likewise operated. The jaw I0 and its respective integrally connected `shank is substantiallysimilar to the jaw II and its Vintegrally connected shank. As illustrated, the jaw Ii) and :its respective shank is provided with a sideportion ll and the jaw `II with its respective shank is l.provided with a side portion 18. The handle 22 has its pivotally mounted end 24 pivotally connected .to the side portion 5110i Athe Similarly, the handle23 has its pivotally mounted-end 25 `pivotally connected to the side portion .i8 of .the jaw II by means of pivot means 2l. Accordingly, the two handles 22 and 23 are connected respectively to the `iaws I0 and .Il The lower end of the shank i5 is .connected to the handle 23 by means of a link 29. The `lower end of the vlink 29 is connected to Athe ,lower .end of the shank I5 by means of apivot v3l and the upper end of lthellink is connected to the 'handle 23 `byrreans of a Ipivot 3,3. Similarly, the lower end of the shank I6 is connected to the handle 22 'by means oi a 'link 28. The lower end of the link 23 is connected to the lower end of the shank I5 by means of a pivot Sil and the upper end of the link 28 is connected to the handle 22 by means of a pivot 32. The pivotpins 26 and 32 are reinforced by re* inforcement links 34 mounted within the handle 22, Similarly, the pivot means 2l .and 3.3 are re: inforced by reinforcement links 34 mounted within the handle 23.

When the handle '22, Afor example, is movedinwardly the `pivot `means .32 moves towards a straight line drawn `between the pivot means ,'25 and'3. Therefore, a large force is exerted 'at the pivot means 2S in the direction of the illustrated arrow. A force in the direction of the illustrated arrow .rotates the cutting jaw in a .counter-clock- .mechanicaladvantage vof fthe linkage mehlim Accordingly, the lever mechanism produces a relatively large working force on the jaws for a relatively small amount of pressure applied to the handles. The shanks of the jaws are employed as reaction elements against which the lever mechanisms respectively exert forces for rotating the jaws. The Figure 4 illustrates diagrammatically the position of the linkage mechanism when the handles are spread apart. The distance between the pivot means 32 and the pivot means 26 is less than the distance between the pivot means 30 and 25. Similarly, the distance between the pivot means 33 and 2 is less than the distance between the pivot means 3| and 2l.

In Figures and 6 I show a modified form of my tool in that the lever mechanism is applied to but one side of the tool. In this embodiment of the invention a handle 36 is connected integrally with the shank I5 and the jaw Il. As the handles 23 and 36 are moved relative to each other, the lever mechanism produces a mechanical advantage for moving the jaws relative to each other whereby a strong working force may be applied to the jaws for a relatively small pressure applied to the handles 23 and 36. The Figure 6 shows diagrammatically the position of the linkage mechanism when the handles are spread to their open position.

In my invention, it is to be noted that the shank which is attached to one of the jaws is employed las a reaction element against which the lever mechanism exerts a force for rotating the other jaw. It is furthermore observed that the linkage mechanism is disposed within the handles which are channel shaped with the result that there are no externally projecting parts which interfere with the ease of handling the tool.

Although I have described my invention with a certain degree of particularity, it is understood that the present disclosure has been made only by Way of example and that numerous changes in the details of construction and the combination and arrangement of parts may be restorted to without departing from the spirit and the scope of the invention as hereinafter claimed.

What is claimed is:

1. A tool comprising first and second working jaws having first and second Shanks integrally connected respectively thereto, main pivotal connection means for pivotally connecting said jaws with said shanks in cross-pivotal relation with respect to each other, a first handle adapted to pivot said first shank and jaw about said main pivotal connection means, said first jaw having a side portion provided with a pivot opening, a second handle comprising a channel member and having a pivotally mounted end, said channel member having side Walls adapted to straddle said side portion of the first jaw, actuating pivotal connection means mounted in said side walls and extending through said first pivot opening for connecting the pivotally mounted end of the sec` ond handle to the side portion of the said first jaw at a pivot point spaced from said main pivotal connection means, link means having a first end provided with a first pivot holearid disposed within the channel member of said second handle,

` said link means having a second end adapted to be pivotally connected to the end of the second shank, first pivot means mounted in said side walls and extending through said first pivot hole for connecting the first end of said link means to said "second'handle, `and second pivot means for connecting the second end of said link means to the end of the second shank, a line extending from the actuating pivotal connection means to the first pivot means and a line from the rst pivot means to the second pivot means defining an included obtuse angle at al1 positions of said second handle means.

2. A tool comprising first and second working jaws having first and second Shanks integrally connected respectively thereto, main pivotal connection means for pivotally connecting said jaws with said shanks in cross-pivotal relation with respect to each other, a first handle adapted to pivot said first shank and jaw about said main pivotal connection means, said first jaw having a side portion provided with a pivot opening, a second handle comprising a channel member and having a pivotally mounted end, said channel member having side walls adapted to straddle said side portion of the first jaw, actuating pivotal connection means mounted in said side walls and extending through said first pivot opening for connecting the pivotally mounted end of the second handle to the side portion of the said first jaw at a pivot point spaced from said main pivotal connection means, link means having a first end provided with a first pivot hole and disposed within the channel member of said second handle, said link means having a second end adapted to be pivotally connected to the end of the second shank, first pivot means mounted in said side walls and extending through said first pivot hole for connecting the first end of said link means to said second handle, second pivot means for connecting the second end of said link means to the end of the second shank, a line extending from the actuating pivotal connection means to the first pivot means and a line from the first pivot means to the second pivot means defining an included obtuse angle at all positions of said second handle means, and a reinforcing member in said channel for mechanically interconnecting the actuating pivotal connection means and the first pivot means.

3. A tool comprising a pair of working jaws having first and second shanks respectively, main pivotal connection means for pivotally connectingsaid jaws with said Shanks in cross-pivotal relation with respect to each other, said first jaw having a side portion provided with a first pivot opening, said second jaw having a side portion provided with a second pivot opening, a first handle comprising a channel member and having a pivotally mounted end, a second handle comprising a channel member having a pivotally mounted end, said channel members each having side walls adapted to respectively straddle the said side portions of the first and second jaw members, respectively, first actuating pivotal connection means mounted in said side walls of said first handle and extending through said first pivot opening for connecting the pivotally mounted end of the first handle to the side portion of the first jaw at a pivot point spaced from said main piv-` otal connection means, second actuating pivotal connectionmeans mounted in the side walls of 5 in the side Walls of the rst handleand extending through said rst pivot hole for connecting the first end of the first link means to said first handle, second pivot means for connecting the second end of the iirst link means to the end of the second shank, a line extending from the rst actuating pivotal connection means to the rst pivot means and a line from the rst pivot means to the second pivot means dening an included obtuse angle at all positions of said first handle means, second link means having a rst end provided with a third pivot hole and disposed within the channel member of the second handle, said second link means having a second end adapted to be pvotally connected to the end of the rst shank, third pivot means mounted in the side Walls of the second handle and extending through the third pivot hole for connecting the rst end of the second link means to said handle, and

fourth pivot means for connecting the second end of the second link means to the end of the rst shank, a line extending from the second actuating pivotal connection means to the third pivot means and a line from the third pivot means to the fourth pivot means defining an included obtuse angle at all positions of said second handle means.

WILLIAM A. BARNES.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Nam-e Date 635,417 Bernard Oct. 24, 1899 955,287 Schofield Apr. 19, 1910 1,299,100 Anderson Apr. 1, 1919 Patent No. 2,539,294

Certificate of Correction January 23, 1951 WILLIAM A. BARNES It is hereby certified that error appears in the printed specication of above numbered patent requiring correction as follows:

Column 5, line 19, after the Word said insert second;

and that the said Letters Patent should be read as corrected above, so that the same may conform to the record of the case in the Patent Oice.

Signed and sealed this 27th day of March, A. D. 1951.

fsw]

THOMAS F. MURPHY,

Assistant Commissioner of Patents.

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