US1331212A - Tool for severing metal bars - Google Patents

Description

1. F. REILLY. Too'L FOR SEVERING'METAL BARS.

APPLICATION FILEDy NOV. I6. i918.

Patented Feb. 17,1920.

UNITED STATES PATENT OFFICE.

JOHN F. REILLY, OF SOMERVIJLE, MASSACHUSETTS.

TOOL ron snviinnve METAL BARS.

Application filed November To all whom t may concern Be it known that I, .loi-1N F. REILLY, acitizen of the United States, residing at Somerville, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Tools for Severing Metal Bars, of which the following is a specilication.

This invention relates to tools for severing metal bars and is especially adapted to severing bars of hard brittle metal such for example as bars of unannealed tool steel. These bars are very diflicult to sever by cutting and when so severed it is customary to grind a groove around the bar at the point where'it is desired to sever it by means of an emery wheel, and to .thenibreak the bar at thev grooved portion thereof, or saidv bars may be out by heating the'same and cutting them while hot. These dili'erent processes are slow and expensive.

It is the object of this invention to provide a convenient tool for use in shops which is adapted to hold the metal bar firmly in position, and then by manually operating a bender, to crack the bar at the point where it is held by the tool and thus sever a p0rtion thereof from the bar.

The invention resides in the means by which the bar is held and in the means for bending the bar while so held.

The invention further consists in the combination and arrangement of parts set forth in the following specification and particularlyA pointed out' in the claims.

Referring to the drawings, Figure 1 is a plan view of my improved tool for severing metal bars. y

Fig. 2 is a. sectional elevation taken on line 2-2, Fig. 1.

Fig. 3 is a sectional elevation taken on line .fi- 3, Fig. 1.

Fig.v 4 is a detail section taken on the line 4--4 of Fig. 1.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, 5 is a holder, having a flange 6 thereon. A gripper 7 is slidably 'mounted on the holder 5 and has a bearing edge 8 adapted to bear against one side of a metal bar 9, thej opposite side of said bar resting against the straight edge 10 of the flange 6, said bar also resting against the face 11 of the holder 5. The gripper 7 is slidablymounted onl the holder 5 and is provided with a screwthreaded .shank 12,

Speeicaton of Letters Patent.

Patented Feb. 17, 1920.

1e,- 1918. sei-iai No. 262,865.

which extends through a hole 13 in the holder 5, and which is adjusted to move the bearingy edge 8 toward or away fromr the straight edge 10 of the flange 6 by an adjusting nut 14. The gripper 7 and the flange portion 6 of the holderr formi together a clamp for rigidlyholding the bar which is to be severed inpositionl during the severing operation.

Abender 15 is slidably mounted in ways 16 provided in the holder 5, and is held-in position in said ways by a cap plate 17. The bender l5 is moved away from the bar'9 by a spring 1S, which is connected at one end thereof toa screw 19, which is fastened to the bender 15, and at the opposite'end said spring is attached to a plate 20, which is attached at its lower end by a screw 21 to the holder 5. The bender 15 is moved toward the bar 9 to bend the same and cause it to Je severed by two pairs of toggle links 22, 28 and'24, 25. ed on the holder 5 between a pair of levers 26 and 27, which are pivotedl at 28 and 29 respectively to the holder 5. The upper ends of the links 22 and 24 are roundedroif and enter corresponding recesses provided.

in the lower end of the bender 15. The lower ends of the links 22 and 24 are pivotally connected to the upper' ends ofthe links 23 and 25, said links`22 and 24 being forked at 22 and'24 whereby they may'receive tongues 23 and 25 respectively formed upon the links 23 and 25. These adjacent ends of the said links are also rounded to lit each other and altho'ughnotpinned together they cannot become separated when the tool is assembled. The lower 'ends of the links 23 and 25l are-rounded off and enter correspondingly shaped recesses provided in the holder 5. The inner faces of the levers' 26 and 27 are' provided with U-shaped ears 30 and 31 respectively, which bear against the links 22`and 24. The upper end of the bender 15 isrounded at 32 where it bears against the edge vofthe bar 9.

The general operation of the device hereinbefore specifically described is `asifolloiws: The bar 9 is placed upon the face 11 of the holder 5, with its llower edge bearing against the straight edge 10 of the flange 6 on said holder. The gripper 7 is then operated by means of the nut 14 to move the bearing edge 8 of said gripperagains't lone` edge of the bar 9.-

It i will be? noted that ,I theamedan' longi- These toggle links are mountin combination, a clamp adapted to hold a tudinal line of the shank 12 of' the gripper converges toward the median longitudinal line of the bender 15, and that said lines converge toward a point located at the same side of the bar 9 as that upon which 'the gripper is located, and on the opposite side of said bar from that upon which said bender is located. l

The arrangement of the converging median lines of the tool is for the following purpose: viz, that when the bar 9 has been bent by the bender 15 to such an extent that it is ready to break or crack olf, the portion so bent will then be substantially at right angles to the median line of the bender l5.

The bar having thus beenk firmly clamped in position, the operator moves the handles 26 and 27 toward each other, thus moving the oppositely disposed pairs of links toward each other, and causing the bender slide 15 to move forwardly as toward the bar 9. A continuation of this movement will cause the bar to be bent very slightly upward, and being held firmly by the bearing edge 8 of the gripper 7, said bar will be cracked ofi' transversely thereof, and in alinement with the bearing edge 8, as at the dotted line A, Fig. 1.

The handles are now moved apart and the spring 1S operates to cause the ender 15 to move rearwardly. The toolis now in readiness to be used for another severing operation.

I claim:

1 1. A tool for severing metal bars, having metal bar, a bender adapted to engage said bar at one side of said clamp, and a pair of levers adapted to move said bender transversely of said bar, whereby said tool may be lmanually operated.

2. A tool 'for severing metal bars, having in combination, a clamp comprising a holder and a gripper adapted to press said bar against said holder, a bender adapted to.` engage said bar at one side of said gripper, andl a pair of levers adapted to move said bender transversely of said bar, whereby Said tool may be manually operated.

3. A tool for severing metal bars, having incombination, a clamp comprising a holder and a gripper with a bearing edge adapted to Contact with said bar transversely thereof and press it against said holder, a bender adapted to engage said bar at one side of said gripper, and a pair of levers adapted to move Vsaid bender transversely of said bar,A

whereby said tool may be manually operated. .4. A tool for severing metal bars, having in combination, a clamp comprising a holder and a gripper with a bearing edge adapted to contact with said bar transversely thereof and press it against said holder, a bender havinga rounded end adapted to engage said bar at one side of said gripper, and a 5. A tool for severing metal bars, having Y in combination, a clamp adapted to hold'a metal bar, a bender adapted to engage said bar at one side of said clamp, and means to move said bender transversely of said bar,

the median longitudinal lines of said gripper and bender converging toward a point located on the same side of said'ba-r Vas said gripper and on the opposite side of said bar from said bender. Y o Y 6. A tool for severing metal bars, having in combination, Va holder, a flange on said holder, a gripper slidable on said holder toward and away from said flange, means to move said gripper toward said flange, whereby a 'bar may be clamped between said gripper and flange, a bender slidably mounted on said holder at one side of said gripper and adapted to engage said bar, and a pair of levers adapted to move said bender transversely of said bar, whereby said tool may be manually operated.

7. A tool for severing metal bars, having in combination, a holder, a flange on said holder, a gripper slidable on said holder toward and away from said flange, means to move said gripper toward said flange, whereby a bar maybe clamped between said gripper and flange, a bender slidably mounted on said holder at one side of said gripper and adapted to engage said bar, toggle links mounted on said holder and engaging said bender, and leversadapted to engage said links, whereby said bender lmay be manually moved transversely of said bar.

8. A tool for severing metal bars, having in combination, a holder, a flange on said holder, a gripper slidable on said holder toward and away from said flange, means to move said gripper toward said flange, whereby a oar may be clamped between said gripper and flange, a bender slidably mounted on said holder at one side of said gripper and adapted to engage said bar, a pair of levers pivoted to said holder, two pairs of oppositely disposed toggle links mounted on said holder between said levers, each of said pairs of links being pivotally connected t0- gether, the end of one link of each of said pairs of links being arranged to bear against said bender. and one end of each of the other links of said pairs of links bearing against saidV holder., whereby said benderY may be Vholder, a gripper slidable on said holder toward and away from said flange, means to move said gripper toward said flange, whereby a bar may. be clamped between said gripper and flange, a bender slidably mounted on said holder at one side of said gripper and a spring connected to said bender and to said holder, whereby said bender may be moved away from said bar.

In testimony whereof I have hereunto set 15 my hand in presence of two subscribing witnesses.

JOHN F. REILLY.

Witnesses:

CHARLES Y. GooDrNG, FRANKLIN E. Low.

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