US532123A - File-cutting machine - Google Patents

Description

' I(No Model.) 3 sheets-sheet 1.

A. WEED.

FILE CUTTING MACHINE.`

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A. WEBB. FILE GUTTING MACHINE..

No. 532,123.' Patented-Jan. 8, 1895.

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UNrTRD STATES PATENT Queres.

ALFRED WERD, Vor TARRYTOWN, NEW YORK.

FILE-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 532,123, aat-ea January e, 1895.

Application filed March l5, 1893. Serial No. 466,129. (No model.)

To all whom it may concern:

Be it knwon that I, ALFRED WEED, a citizen of the United States, residing at Tarrytown, in the county of Westchester and State of New York, have invented certain new and useful Improvements in File- Cutting Machines, of which the following is a-specification.

My invention has for its object to regulate with precision the operations of the devices used to cut the teeth of le blanks and my invention consists of a file cutting machine constructed as fully set forth hereinafter so as to secure such result.

In the accompanying drawingsr Figure 1 is a side View of a file cutting-machine embodying my improvements. Fig. 2 is a front ele-y vation. Fig. 3 is a longitudinal sectional elevation. Fig. 4 is a section on the line 4-4, Fig. 3. Fig. 5 is a plan of the blank carrier. Fig. 6 is a perspective view of the cam.

The base A of the machine is ofl any suitf p able form so as to obtain the required solidity and stability. As shown, it is in the form of a standard which supports at the upper end a platform 50, in a channel in which slides the carrier for the tile blanks, which carrier is provided with any suitable detent for holding the heel of the blank in place. For instance, there are two headed bolts, 5l, 5l, the heads of which overlie the tang and heel of the blank and hold it in place. The said blank may lie directly against the face of the carrier, but in order to secure greater solidity and a better bed for the blank, I prefer to cut away the carrier so as to form a recess preferably corresponding in outline with the form of the blank, or it may be somewhat larger, and I fill this recess with tin or lead, or other soft material or composition, so as to constitute asoft metal or similar bed 52 upon which the blank lies, and the kblows that are imparted to the blank are sustained by this bed, which rests directly upon the platform, 50, instead of being sustained by the carrier which slides upon the platform and between which and the platform, there is necessarily some Y slight space. By this means, the bed is maintained directly in contact with the platform 5o `50 of the base so that there is no jar orvibration between the support for the blank and the base, and a much better cutting eect is secured.

The cutter 7 and its supports are carried by a swinging frame B, which is4 pivoted by clamping bolts 53`to the sides of the platform at a point about level with the carrier 10, so that said frame B may be swung to and secured at any desired angle to bring the cutter at the required angle to the blanks. As shown, all the partsare in a vertical position, but in operation, the frame B would be swung to the right, Fig. 3, to such an angle as would be required to bringt-he point of the cutter 7 in its proper relation to the surface of the blanks.

The cutter 7 is ofany suitablev construction and size according to the character of the le to be out, and it is clamped in a stock 6, which in turn, is clamped in the plungerf, which plunger sli'des in suitable guides in the frame B.

In order to take up wear and prevent the plunger under any circumstances, from hav- :ing` any lateral play, I prefer to make itfwith inclined sides, as best shown in Fig. .4, so as to it a flaring recessy in the frame B, and to employ means whereby the plunger may be drawn into said recess to compensate for Wear, so that there can at no time, be any possible play. As shown, there is a screw rod,

'16, extending from the back of the plunger 'lhe downward movement of the plunger is eected by means of a rubber. spring 8, in ,theA form of a hollow cylinder although any other spring orl means of throwing down the plunger may be employed, and the spring may be set to secure any desired quickness and strength of blow by compressing the same between the top of the plunger and the washer, and the washer maybe adjusted j i v Y v by means of a screw 9 bearing on the said washer and extending through a threaded opening in the top of the frame.

The plunger is lifted at proper intervals by any suitable mechanism. As shown, there is a double cam 13, which is carried by a cross shaft 12, turning in bearings 19, 19 of th'eframe B, the said shaft carrying aband wheel 22, upon which is placed the belt from any suitable source of power. The cam 13 acts upon the head of a screw bolt 14 which passes through a nut or projection 15, extending from the front of the plunger, the said nut being preferably split and provided with a cross screw or bolt whereby the sides may be brought together to clasp the bolt 14 and hold it in place after adjustment, the adjustment of the bolt 14 determining the extent to which the plunger shall be lifted by the action of the cam.

' The carriage 10 is held against a cam D by a spring s and the regular feeding of the carriage is regulated by means of said cam D. This cam D may be spiral or of any other suitable shape. I prefer, however, to make it in the form of a block with an inclined edge to which a sliding motion is imparted by any suitable means, and against the edge of the block bears a projection or roller 35 upon a lever 32, which is pivoted at 45 and the upper slotted end of which receives a projection 33, ext-ending from the rear end of the carriage 10.

At the beginning of operations, the carriage 10 is at the position shown in Figs. 1 and 3 and the cam D 'is then carried gradually downward so that the lever 32 moves gradually to the right carrying with it the carriage 10, so that at each descent of the cutter 7, a fresh portion of the blank is presented until the entire face is cut to the extreme point of the latter, the stock 6 being turned so as to put the cutter 'at any proper transverse angle when this is necessary.

Anyl suitable means may be employed for gradually moving downward the cam D. As A shown, the said cam is provided with a toothed rack, 31 which engages the side of a vertical worm wheel 29, carried by a vertical shaft 28, which is driven through the medium of gears 26, 27, and motion is' imparted to the gear 26 from the shaft 12 through the mediunrof pulleys 23, 24, and an endless band or rope 25.

The said pulleys may be step cone pulleys, as shown, so that the relative speed of motion between the shaft 12 and the cam may be varied by placing the band 25 upon different portions of the pulleys.

Where a decrement of movement is desired, as for instance where it is desired to bring the teeth of the file .closer together as they approach the point, the cam D maybe shaped accordingly. Thus instead of having astraight edge as shown in Fig. 1,the edge may be gradually curved with a gradual increasing curve as shown in dotted lines, and the same effect would be produced by the substitution of a revolving spiral cam instead of a sliding cam with a straight or ourvededge.

In cutting the file from the point toward the heel, it is desirable to increase the force of the blows in proportion as the body of the metal acted upon increases, as otherwise, the teeth would not be of equal depth. To this end, I provide means for gradually increasing the lift or the throw of the plunger as the blank is carried from the point toward the heel. One method of securing this result is by the l use of a tapering cam 13 which gradually iny creases in the radial extent of its cam projection from the inner to the outer end, and gradually carrying this cam beneath the bearing head ofthe screw 14 as the work progresses. Thus in the construction shown, the cam and bearing are in the position which they occupy at thel beginning of operations,

and as these operations continue, the cam 13 is moved to the left, Fig. 2, so that the lift of the plunger is gradually increased, the spring 8, is compressed to a greater extent at each movement, and the blow is proportionately augmented.

Any desired means may be employed for moving the cam 13 to secure the above described result. It may be done by hand by turning a screw 20 so as to bear upon the end of the shaft 12 and gradually force the' latter to the left, the turning of the screw being effected by means of a crank handle 21. It is preferable, however, to move the cam 13 a-utomatically, which may be done through the medium of appliances connected with any moving part of the machine. Thus, between the side of a slot w in one of the bearings 19 of the frame B and the end of the shaft 12 is placed a wedge 59 which isconnected by an arm 60 with the carriage 10. As the carriage 10 moves toward the left, Fig. 3, the thicker portion of the wedge is gradually brought between the bearing and the end of the shaft 12, and the cam 13 is gradually forced to the left.

It is desirable to exert a pressureupon the blank tending to hold it rmly upon the carriage at a point adjacent to that where the chisel acts upon the blank, and to this end I make use of a presser bar 40 having a iat edge which bears against the blank, and a stem which extends through a rock shaft 46 turning in a bearing 41 connected with the platform 50, and this shaft is rocked through the medium ofA an arm 42, rod 43, and treadle 44 pivoted at the end of the shaft 45 to which the lever 32 is joined. By pressing upon the treadle with the foot, the end of the presser bar may be lifted from the blank, but when the foot is removed a weight S upon the rod 43, serves to rock the shaft and bring the presser foot to bear upon the face of the blank.

Without limiting myself to the precise construction and arrangement of parts shown, I claim- 1. The combination with the frame B, having a recess y provided with inclined sides and IOO IIC)

an elongated slot w, extending from said recess tothe rear of the frame, a reciprocating plunger 5, provided with a tool carrier and having inclined sides fitting said recess, a bolt `extending from the plunger through the slot in the frame, and a washer and nuts attached to said bolt, and means for reciprocating the plunger, substantially as described.

2. The combination with the reciprocating plunger, of an operating cam increasing or diminishing toward one end, devices for` shifting the same and connections between said devices and a movable part of the machine, substantially as described.

3. The combination-With the blank-carrier of a tile cutting machine, of a movable cam, and connections between the blank-carrier and cam arranged to shift the camupon the movement of the carrier, substantially as set forth.

y 4. The combination withthe blank carrier of a file cut-ting machine, of a sliding cam D having an inclined edge, a lever connected with the carrier and carrying a bearing in contact with said edge and means for sliding the cam, substantially as set forth.

5. The combination with the sliding blank carrier, lever and cam D, of a rack on the cam, a worm engaging said rack, and means for rotating said worm, substantially as set forth.

6. The combination of the movable blank carrier, of a cam controlling the movement of the carrier, means for moving the cam at a uniform speed, the cam being provided with a gradually increasing curve toward its end, whereby a decrement of movement of the blank carrier is produced, substantially as described.

7. The combination with the blank carrier Y CHARLEs E. FOSTER,

G. P. KRAMER.

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