US1288858A - Shears. - Google Patents

Description

T. J. FEG LEY & G. 0. LEQPOLD.

Y APPLICATION FILED JULY 21, 1911.

SHEARS.

IIIIIIlllllllllflllllllllllill lllllll lllllllllllllllllllllllllllllllllllllllllll Patented Dec. 24, 1918.

2 IIHiE TJJ. FEGLEY & G. 0. LEOPOLD.

' SHEARS.

APPUCATION FILED JULY 27,19]?- 1,288,858. Patented Dec. 24. 1918.

2 SHEETS-SHEET 2.

AT FTCE.

THOMAS J. FEGLEY AND GEORGE O. LEOPOLD, OF PHILADELPHIA, PENNSYLVANIA,

ASSIGNORS TO NORTH BROS MFG 00., OF PHILADELPHIA, PENNSYLVANIA, A COR- PORATION OF PENNSYLVANIA.

SHEARS.

Specification of Letters Patent.

Patented Dec. 24, 1918.

To all whom it may concern:

Be it known that we, THOMAS J. FEGLEY and GEORGE O. Lnorom), citizens of the United States, and residents of Philadelphia, Pennsylvania, have invented Shears, of which the following is a specification.

One object of our invention is to provide a novel form of shear particularly designed for cutting material in the form of bars, bands, rods, plates, belts, etc., which shall include a movably mounted blade so supported that a relatively small angular movement of an operating member such as a handle shall result in a comparatively long cut of said blade.

It is further desired to provide a shear of the above noted type with a relatively simple and substantial arrangement of parts so designed as to cause a movable blade to progressively engage or cooperate with a fixed blade ;the construction being such that said movable blade will act upon the material to be cut with a drawing movement.

We further desire to provide a shear which shall include a blade carrying structure of novel form, together with novel means for so supporting said structure that its blade will not only be caused to act with a drawing out but in addition it shall be so held in a raised position when not in use that its accidental release and downward movement shall be prevented ;the invention contemplating a novel construction of parts for frictionally holding the blade supporting structure or carrier in any given position.

Another object of our invention is to provide a novel form of movable blade support, together with a cam device whereby the upper blade when put in operation is first moved bodily down toward and into engagement with one end of the lower or fixed blade and is thereafter moved along the same with a drawing movement so as to progressively engage its cutting edge with a view to cutting a given piece of material with the expenditure of a minimum amount of power and without the formation of frayed or ragged edges.

The invention also contemplates novel means for adjusting the angle of the movable blade relatively to the fixed blade as well as novel means for adjusting the position of one or both of said blades.

These objects and other advantageous ends Fig. 5 is a vertical section on the line.

55, Fig. 1; and

Fig. 6 is a fragmentary vertical section on the line 66, Fig. 1.

In the above drawings, 1 represents a relatively heavy casting constituting the frame of the machine having a base portion provided with projecting lugs or feet 2 where by it may be fastened to any suitable supporting structure. Said base portionincludes a flat table or platen 3, having at one side an elongated straight edge to which is fixed the lower or stationary knife blade or cutter 4. This consists in the present instance of an elongated properly hardened substantially flat bar having at one end an upwardly projecting finger or extension 5 adjacent the body of the frame 1,.designed to serve as an abutment. This cutter 4 is held against the side of the table 3 by any suitable number of supporting members, in the present instance provided by three screws 6, each threaded into the end of a larger diameter screw 7 which in turn is threaded into an opening in the side of the base. By means of these latter screws 7 it is possible to adjust the position of the lower cutter 4: as to its distance from the side of the table 3.

At one end of the table the body of the frame 1 is extended upward and is then projected laterally over the table to form a head 8 having an enlarged boss 9 concentric with its circularly curved outer portion, in which is rigidly mounted a shaft or pivot spindle 10, held from rotation in said head by a key 11. That face of the head 8 opposite the boss 9 is provided withacircular finished or plane portion against which operates a flat plate 12 constituting the carrier or support for the upper or movable knife blade 13. Said carrier has the general form of a triangular plate and is formed with a straight bottom edge to which the blade or cutter 13 is held by a suitable number of screws 14.

The body of the carrier is preferably cut away to provide a relatively large opening 15 through which the spindle 10 passes and in addition the carrier has an elongated cam slot 16 extending upwardly adjacent its upper side from what may be described as the inner end of its lower edge. The lower end of this slot 16 is extended abruptly in a line practically at right angles to its main portion as indicated at 17 and is designed for the reception of a guide roller 18 rotatably mounted on the cylindrical head 19 of a bolt 20 to which it is held by a cap screw 21. This bolt extends through a substantially vertical slot 22, formed in the body of the frame 1, above the inner end of the lower cutter 4 and slightly below the level of the pivot spindle 10. This bolt has a clamping nut 23 whereby it may be retained in any given position in the slot 22.

' Rotata'bly mounted on the projecting ent of the pivot spindle 10 is a lever 24 in the form of a substantially circular plate having one arm 25 extending upwardly and made tubular for the reception of an operating handle 26. The second arm 27 of said lever is pivoted to the knife carrier 12 above and to the rear of the forward end of the upper blade 13;the lines of the two arms 25 and 27 being at about an angle of 120 in the case illustrated. I

The lever 24 is retained on the spindle 10 by a plate or washer 28 held in place by a screw 29 passing through it into the spindle 10 and prevented from rotating relatively thereto by pins 30. We preferably locate a washer 31 between the plate 28 and the hub of the lever 24. This washer is preferably of raw hide, or other suitable friction producing material, and is for the purpose of causing a breaking or movement-retard ing force sufficient to prevent the accidental rotation of the lever on its pivot. That end of the spindle 10 within the boss 9 stops short of the outer face of the latter and has threaded into it a screw 32, whose head engages awasher 33,'which engages said face of the boss.

A screw 34 or other suitable form of abutment, preferably adjustable is mounted in the vertical face of the body of the frame 1 immediately over the inner end of the table 3 so as to be capable of co6per'ating with the abutment 5 of the cutter 4 to position a body of material operated on so that it will be cut accurately at right angles to the line of its straight side when this engages these two abutments.

When the machine is not in use the various parts occupy the positions shown in Fig. 1 the roller 18 lying in the end portion 17 of the cam slot 16 and the lever arm 25 with its handle 26 extending in the case illustrated at an angle of about 45 to one side of the vertical. The body of strip ma ,terial to be out such as a piece of brake lining or leather belt, may then be conveniently introduced between the blades or cutters and positioned by having one of its longitudinal edges brought into engagement with the abutments 5 and 34.

If now the handle 26 be so moved as to bring the lever into the position shown in Fig. 2, in which it extends in a line at about 45 on the opposite side of the vertical, the arrangement of parts described causes the upper knife blade or cutter 13 to move from a position almost parallel with the fixed blade 4' into an inclined position in which its forward end engages and begins to cut through the material. The resulting rearward movement of the knife carrier 12 causes a slight elevation of its rear end owing to the passage of the roller 18 from the part 17 into the lower end of the main portion of the cam slot 16. The continued movement of the lever on its pivot spindle toward the final position above noted, causes the upper blade ,13 to move substantially parallel with itself transversely across the material toward the rear or main portion of the frame, so that it has a drawing or diagonal motion which causes it to make a clean cut and that with the least expenditure of energy.

The cam slot 16 is so situated and formed that it will cooperate with the roller 18 to cause the rear or inner point of the knife blade 13 to travel practically in a straight line downwardly toward the fixed cutter 4 and toward the rear of the machine. At the same time the forward or outer end of the blade moves downwardly and to the rear in a flat but slightly curved line, with the result that said blade may be considered to first have agenerally downward move ment at the beginning of its stroke and thereafter to move to the rear practically parallel to itself. It is thus lowered into engagement with the material to be operated on and then forced to cut through the same with a drawing movement.

Should it be desired to change the angle between the upper cutter 13 and the lower cutter 4, this may be accomplished by loosening the nut 23 on the bolt 20 and moving the latter up or down in its slot 22 so as to swing the carrier 12 about the pivot which connects it to the lever 24. The lower cutter 4 may at all times be kept in position to suitably co6perate with the movable cutter 1.3 by slacking off the screws 6 and suitably manipulating the main screws 7 until said lower cutter occupies the desired position.

It is noted that as the handle 26 is moved toward its vertical position the weight of the cutter 13 and of the carrier 12 tends to continue such movement and to lower said cutter into position to cofjperate with the cutter 4; By providing-the friction washer 31 however, this automatic movement may be prevented and any suitable amount of friction may be exerted between the lever 24, the washer 28 and pivot spindle 10 by setting up on the screw 32, and through said spindle, causing said lever 24 to frictionally act on the carrier 12 and likewise cause the latter to frictionally cooperate with the face 8 of the frame.

The operating handle 26 is preferably made to be conveniently removed from the tubular arm 25.

We claim 1. The combination in a shear, of a frame: a lever fulcrumed thereon; a cutter carrier arranged to slide on the frame and pivoted to the lever; cutters mounted respectively on the frame and on the carrier; and means for guiding the carrier to cause its cutter to make a shear cut when the lever is turned.

2. The combination in a shear, of a frame; a cutter carrier pivoted to the frame; a cutter mounted on the frame and a cutter mounted on the carrier; a lever fulcrumed on the frame and having an arm pivoted to the carrier; and a post on the frame engaging the carrier so that when the lever is turned on its pivot the cutter of the carrier will make a longitudinal shear movement past the cutter on the frame.

3. The combination of a frame provided with a cutting edge; a lever fulcrumed on the frame; a guiding post on the frame; a carrier pivoted to the lever and provided with a cam having two portions substantially at right angles to each other in position to cooperate with the guiding post; with a second cutter mounted on the carrier in position to cooperate with the first cutter when the lever is moved.

4. The combination of a frame having a fixed cutter; a lever pivoted thereto; a carrier pivoted to the lever and mounted between the same and the frame; a cutter secured to the carrier; and means for slidably guiding the carrier longitudinally so as to cause the cutter thereon to pass the fixed cutter with a shear movement.

5. The combination of a frame having a substantially horizontal shearing edge; a carrier; a cutter on the carrier; and actuating mechanism for said carrier including means for first moving it bodily downward toward the shearing edge on the frame and thereafter moving it transversely of said edge parallel to itself, said means consisting of an actuating member; a cam formed in two portions substantially at right angles to each other; and an element cooperating with said cam.

6. The combination of a frame having a table; a cutter extending along one side of the table, said table having a series of threaded openings; a series of screws adapted to the openings and arranged to bear against the back of the cutter; said screws also having threaded openings, smaller screws adapted to the threaded openings in the first mentioned screws and arranged to confine the cutter to said first mentioned screws; a second cutter movably guided on the frame; and means for causing the second cutter to cooperate with thefirst cutter.

7 The combination of a frame; a cutter thereon; a carrier; a second cutter mounted on the carrier; an actuating lever on the frame; a pivot pin mounted on the frame and on which the lever is mounted, said lever being pivoted to the carrier; and means carried by the said pivot pin for frictionally engaging the hub of the lever so as to retard the movement of the lever on its pivot.

8. The combination of a frame; a relatively fixed cutter thereon; a carrier guided on the frame; a second cutter mounted on the carrier; a pivot spindle on the frame; a lever rotatably mounted on said spindle and having an arm projecting in one direction therefrom; means for pivotally connecting said arm to the carrier, said lever having a second arm in the form of a handle projecting in the opposite direction from said first arm; with means for causing the carrier to move substantially parallel to itself transversely of the fixed cutter when said lever is turned on said pivot spindle.

9. The combination in a shear, of a frame; a cutter mounted'on the frame; a movable carrier mounted on the frame; a lever fulcrumed on the frame and pivoted to the carrier, said carrier having an elongated cam slot offset at one end; a pin on the frame extending through the slot and acting to guide the carrier so as to cause the cutter mounted 011 the carrier to have a shearing movement past the fixed cutter.

10. The combination in a shear, of a frame having a pivot pin; a lever mounted on the pivot pin and having an arm; a carrier hav ing two slots; a large slot through which the pivot pin extends and a narrow slot offset at one end; a pin on the frame extending into the said narrow slot; a cutter mounted on the carrier; a fixed cutter on the frame so that on the movement of the lever'on its pivot the carrier and its cutter will make a shear movement past the fixed cutter.

In witness whereof we afiix our signatures.

THOMAS J. FEGLEY. GEORGE O. LEOPOLD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

Images