US1056798A

US1056798A - Cutting-off device.

Info

Publication number: US1056798A
Authority: US
Inventors: John F Kitchen
Original assignee: SPIRELLA CO
Current assignee: SPIRELLA CO
Priority date: 1912-01-29
Filing date: 1912-01-29
Publication date: 1913-03-25
Anticipated expiration: 1930-03-25

Description

J. F. KITCHEN.

CUTTING-OFF DEVICE. APPLICATION FILED JAN.29. -l912.

1,056,798. Patented Mar. -25, 1913.

2 SHEETS-SHEET Z.

WITNESSES INVENTOR COLUMBIA PLANOGRAPH co., WASHINGTON, D. c.

stirrup sra'rns PATENT OFFICE.

JOHN F. KITCHEN, OF MEADVILLE, PENNSYLVANIA, ASSIGNOR TO THE SPIRELLA COMPANY, OF MEADVILLE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

CUTTING-OFF DEVICE.

Specification of Letters Patent.

Application filed January 29, 1912.

Patented Mar. 25, 1913.

Serial No. 674,055.

T 0 all whom it may concern Be it known that I, JOHN F KITCHEN, a resident of Meadville, in the county of Crawford and State of Pennsylvania, have invented a new and useful Improvement in Cutting-Off Devices, of which the following is a specification.

This invention relates to a cutting off de vice and more particularly to a device for cutting strips of metal, as for example, corset stays, into lengths.

The object of the invention is to provide such a device which is simple and effective in operation, not liable to get out of order and in which the cutting off member is mounted so that it is not subjected to detrimental wear or possible damage by operation of the device.

The invention comprises the construction and arrangement of part-s hereinafter described and claimed.

In the drawings Figure 1 represents a sectional elevation through a cutting ofi device constructed according to my invention; Fig. 2 is a front view of the same, the table or support being shown in dotted lines; Fig. 3 is a plan view of the same; Fig. 4 is a sectional elevation on the line t4, Fig. 1, looking in the direction of the arrows; Fig. 5 is a detail plan view of the upper end of the anvil; and Fig. 6 is an elevation of the same.

The parts of myimproved cutting off device may be mounted upon any suitable support or table 1. It is preferred that this support be of such height that an operator may stand or sit in front of the machine in 'such position that he can readily operate the same. The device comprises essentially two parts, a knife or cutter 2 and an anvil plunger 3. In the present machine the anvi plunger 3 is movably mounted and the work is supported thereon and moved into conjunction with the knife or cutter, although, obviously, either of these parts may be mov-- able toward and away from the other, as preferred. As illustrated, the knife or cutter 2 comprises a bar or rod having a cen tral sharp edge t at its lower end, and is so disposed in its support that the edge extends in a direction from front to rear of the device. In cutting some forms of stays, however, notably stays composed of oppositely disposed loops of wire, the cutting edge of the knife is set crosswise of the machine or lengthwise of the stay, its square shape permitting this, in which position it severs the stay by cutting the wire crossing from one loop to the other. The knife or cutter is vertically disposed and is suitably mounted in an upright or standard 5 secured to the upper surface of a body or base 6 which is mounted upon the support 1 and has a downwardly depending sleeve-like portion 7 extending through an aperture 8 therein. The knife or cutter 2 is securely clamped to the forward face of the standard 5 and is firmly held between the same and a plate or block 9, which is securely clamped to the standard by securing bolts and nuts 10. Obviously by untightening the nuts on the securing bolts the knife or cutter may be turned, as stated, or may be adjusted longitudinally to vary the distance of its end edge 4 from the plunger 3.

Plate 9 is preferably provided with an inturned lower edge 9 which hooks under a shoulder on the forward face of standard 5. This prevents the plate from sliding upwardly with the knife, in case the latter has such tendency. If desired, the lower part of plate 9 may also be formed into a guide to assist in directing the strip into its proper place under the knife in rapid cutting.

The downwardly depending sleeve 7 of the base 6 is provided with a cylindrical bore in which slides the plunger 3 referred to. This comprises a cylinder having a slot or kerf '11 in its upper end and a socket 12 on its lower end. In the slot or kerf 11 is mounted an anvil block 12, having a flat upper face for cooperation with the edge 4: of the knife 2, and which is preferably formed of a piece of hardened steel. In rear of the knife or cutter 2 the anvil 3 is provided with a guide 13, comprising a semi-circular plate or block, screwed or otherwise secured to the upper face of the plunger 3 and having a flat forward face 141 against which the operator holds one edge of the strip to be cut, to guide the same. As shown in Fig. 5, the guide 13 has a part of its forward face 1 1 cut away, as at 15, and into this cut away'portion the rear end of the edge 4 of knife 2 projects in such manner that the strip may be completely severed from edge to edge thereof.

Seated in a socket around the plunger and between sleeve 7 and standard 5 is a packing 27, which prevents fine chips and slivers,

produced by the cutting operation, from working down and cutting and clogging the bearing surfaces of the plunger and down-- wardly depending sleeve.

In the socket 12 in the lower end of the plunger 3 is mounted a wear block 16, preferably formed of hardened steel, with which cooperates an eccentric block 17 mounted in the upper end of a lever 18 pivoted upon a shaft or rod 19 mounted in downwardly extending arms 20 of the depending sleeve 7. At its lower end the lever 18 is provided with a laterally bent portion 21 for engage ment by the foot and operation of the machine thereby. The block 17, as shown, comprises a cylinder formed ,of hardened steel and seated in a socket in the upper end of the lever 18. Obviously as the lever 18 is rotated about the belt 19 as an axis the block will engage the block 16 and act as an eccentric or cam to raise the plunger 3.

To prevent rotation of the plunger 3 about its axis the same is provided with a rearwardly extending guide block 22 com prising a headed bolt secured to the lower end of the plunger and projecting through a slot 23 in the sleeve 7. In the bore of a boss 24 projecting rearwardly from the sleeve 7 is mounted a helical spring 25 the lower .end of which engages with the upper face of the block 22 and tends to press the plunger and wear block 16 downwardly against the wear block 17.

The operation of my improved cutting off device will be readily understood from the foregoing description taken in connection with the accompanying drawings. The operator stands or sits at the front of the machine with his foot on the treadle 21, this being at the time in a position directly un der the knife 2. The operator then places a strip on the plunger 3 above the fiat-faced anvil block 12 and with one edge engaged with the forward face 14 of the guide 13. Preferably, a gage or stop 28, having a fixed or adjustable upturned end 29 against which the end of the strip may be placed, is secured to table 1 to determine the length of strip cut. By pressing the foot rearwardly the wear block 17 is oscillated about the bolt 19 as an axis and acts as a cam or eccentric to force the plunger 3 upwardly and press the strip against the edge a of the knife 2. It will be noted that the block 17 is out of line with the axis or median line of the lever 18 and that, furthermore, it moves in a circular path about the bolt 19 as an axis. Consequently it can only move the plunger 3 upwardly to a limited extent and the greatest upward movement of the plunger occurs when the block 17 is in a line between the bolt 19 and the knife 2. The machine is so adjusted that when the block 17 is in the position stated the edge 4 of the knife contacts with the face of the wear block 12.

F or this reason, no matter how far or how much the lever 13 is oscillated, no injury to the parts can occur by engagement of the knife 2 and hardened block 12. The knife edge 4 is turned or adjusted to suit the work in hand, as stated.

The machine described is intended primarily for cutting to proper lengths strips intended for use as corset stays. In devices as commonly constructed for this duty two knives have been provided which shear past each other, the action of these knives being such as to turn a small amount of the material of the strip out of the normal plane of the stay. This leaves a projecting sharp edge at the end of the stay which prevents its easy insertion into the tips or shields which are usually placed upon such stays. In the present machine the action of the cutting 01f device is such that no material of the stay is moved sidewise out of its plane and no sharp edges remain.

What I claim is:

1. In a machine of the character described the combinationof an anvil having a flat face, a cutting off knife having an end edge for cooperation with said anvil face, means for causing relative movement between said knife and anvil to sever a strip fed there between, and a guide secured to said anvil and along which said strip may be fed, said guide having a cutaway portion opposite to the end of the edge of said cutter.

2. In a machine of the character described the combination of a base, a cutter fixedly mounted therein and having an end edge, a plunger movably mounted in the base and having an anvil block in its end, means carried by and movable with said plunger for guiding a strip bet-ween said anvil block and said cutter, said means being cutaway opposite'to the end of the edge of said outter, and means for moving said anvil block toward and from said cutter.

3. In a machine of the character described the combination of a base having a cutter fixedly supported thereon, said base being provided with a depending sleeve, a plunger movably mounted in said sleeve and provided with an anvil block at its upper end, a guide secured to said plunger and having a forward strip guiding face, and means for moving said plunger toward and from said cutter.

l. In a machine of the character described the combination of a base, a cutter adjustably secured therein and provided with an end edge, a plunger movably mounted in said base below said cutter and provided at its upper end with an anvil block having a fiat face for cooperation with said end edge, and means for moving said plunger comprising a lever pivotally mounted on said base and having an eccentric portion engaging the lower end of said plunger.

5. In a machine of the character described the combination with a base having a cutter,

supported therein, said base being provided wit-h a depending sleeve having a bore, a plunger movably mounted in said bore, inter-engaging parts on the plunger and sleeve for preventing relative rotation therebetween, and a lever pivotally mounted in the lower end of the sleeve and having an eccentric portion loosely engaging the lower end of the plunger to move the same toward and away from the cutter.

6. In a machine of the character described the combination with a base, a cutter mount ed therein, said base being provided with a downwardly depending sleeve having arms, a plunger movably mounted in said sleeve and having an anvil block fixedly secured at its upper end, a lever pivotally mounted between said arms and having an eccentric portion engaging said plunger to move the .same, a spring mounted in said sleeve and engaging the plunger to hold it against said eccentric portion, said cutter being so mounted as to be adjustable toward and from the face of said plunger.

7. In a machine of the character described the combination with a base, a cutter mounted therein, said base being provided with a downwardly depending sleeve having arms, a plunger movably mounted in said sleeve and having an anvil block fixedly secured at its upper end, a lever pivotally mounted between said arms and having an eccentric portion engaging said plunger to move the same, a spring mounted in said sleeve and engaging the plunger to hold it against said eccentric portion, said cutter being so mounted as to be adjustable toward and from the face of said plunger, and a guide secured to the upper face of the plunger and having a flat forward face for guiding the strip to be severed.

8. In a machine of the character described the combination of a base, a plunger movable therein and havinga flat face at its upper end and a flat lower end, a fixed cutter adjustably mounted in said base above said plunger for cooperation therewith, and a lever pivotally mounted below said plunger and provided with an eccentric portion loosely engaging the fiat lower end of said plunger to operate the same.

9. In a machine of the character described, the combination of a base having a depending sleeve, a cutter supported on said base, a plunger vertically slidable in said sleeve 'below said cutter and provided with an anvil block, a packing around the upper end of said plunger for preventing entrance of chips between the plunger and its sleeve, and means for moving the plunger vertically against the cutter.

10. In a machine of the character described, the combination of a base, a straight edged cutter supported thereon, a movable plunger for moving a strip into contact with said cutter, and a strip guiding member on said plunger and along which the strip may be fed and having a cut-away portion opposite to the end of the edge of said cutter.

11. A machine of the character described, the combination of a base provided with a depending sleeve, a cutter supported in said base above said sleeve and adjustable longitudinally with reference thereto, a plunger slidable in said sleeve and having an anvil block for cooperation with said cutter, said plunger having a flat lower end, and a lever fulcruined in said sleeve and provided with an eccentric portion loosely engaging the lower end of said plunger for operating the same.

12. In a machine of the character described the combination with a base having a cutter supported therein, said base being provided with a depending sleeve having a bore, a plunger movably mounted in said bore, and a lever pivotally mounted in the lower end of the sleeve and having an eccentric portion for loosely engaging the lower end of .the plunger to move the same toward and away from the cutter.

In testimony whereof, I have hereunto set my hand.

JOHN F. KITCHEN. Witnesses:

J. H. PARDEE, T. F. GHARLTAN.

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