US869419A - Cloth-cutting machine. - Google Patents

Description

PATENTED OCT. 29. 1907.

I'. J. CLARK.

CLOTH CUTTING MACHINE.

APPLICATION FILED NOV. 28. 1906.

m. .du EL@ UNITED STATES FREDERICK J. CLARK, OF BUFFALO, NEv YORK,

ASSIGNOR TO EASTAIAN MACHINE COMPANY,

OF BUFFALO, NEW YORK.

CLOTH-CUTTING MACHINE.

Specification of Letters Patent.

Patented Oct. 29, 1907'.

Application tiled November 26, 1906. Serial No. 3455.153.

To all 'whom tt may concern.'

Be it known that I, Fnunnrneri J. Cirami, a citizen of the United States, r'esiding at ,Buff-alo, in the county of Erie and State of New York, have invented a new and useful Improvement in Cloth-Cutting Machines, of which the following is a specification.

This invention relates more particularly to irnprovements in cloth cutting machines of that class having a r eciprocating motor-operated knife for cut ting thc clot h.

In machines of this class, a presser foot is employed which tr'avels along the top layer' of the cloth in adva nce of the knife and serves to prevent disarrangement of the cloth by the action of the knife.

One object of this invention is to provide means for adjusting this presser' foot and secur'ing it in different positions, which can be easily operated and serves to pr'everrt all play and r'attle of the parts resultingl from the vibr'ations of the nraclrirre.

As commonly consructed, the presser foot is located directly in front ot` the knife and has a slot ted or bifurcated rearwardly-extending heel portion tlrr'ough which the knife passes. In this construction, the pattern line on the cloth dir'ectly in front of the knife is concealed and the operator can only see the line as it appears in front of the presser foot, some distance in advance of the knife, and therefore carnrot tell exactly where the knife is cutting. This is especially disadvantageous in all cases wher'e the lines of the pattern require sharp and angular turns of the knife, as the operator', not being able to see how far' the knife has cut, cannot determine exactly when the machine should be trrrned to Vfollow the pattern. This necessarily results in inaccurate cutting.

A further object of the invention is to so construct the parts of the presser foot, which embrace the knife, that they will not obstruct the operators view ofthe lines of the patternupon the Cloth directly in front of the knife. This result is attained by enlarging the knife slot or opening in the heel portion of the presser' foot, sufficiently in that portion which is adjacent to the front edge of the knife so that the cutting line of the pattern can be readily seen.

In the accompanying drawings: Figure l is a perspective view of a cloth cutting rrrachine embodying the invention. Fig. 2 is a fr'orrt elevation, partly in section, on an enlarged scale, of the presser foot and its adjust ing device` Fig. 3 is a br'okerr side elevation of the same. Fig. 4 is a horizontal section thereof, partly in plan, in line 4 4, Fig. 3. Fig. 5 is a sectional elevation thereof in line 5 5, Fig. 2. Fig. 6 is a plan view of the presser foot and section of the supporting leg.

Like letters of refer'ence refer' to like parts in the several figures.

The cloth cutting machine shown in Fig. l of the drawings is an electrically-operated reciprocating knife machine of ordinary construction, except as hereinafter descrilmd, having an electric motor A mounted in a fr'anre l and operatively connected to a reciprocating knife C. A standard D secured to a base or foot plate E supports the motor and knife-operating mechanism. This standard has a vertical groove or way open at its front edge in which thc reciprocating knife (i travels and b v which the same is guided.

F is a presser foot adapted to be secured at different desired elevations directly in front of the knife C in a manner to be hereinafter described and to rest upon the top layer of the cloth which is being cut. This presser' foot preferably has a forwardly-extending toe portionfat one side of the longitudinal center' thereof, and a rearwardly-extending slotted or bifurcatedheel portion A/y adapted to embrace the cutting knife C and the narrow front edge of the standard D. The knife slot in the presser' foot is widened adjacent to the center' of the foot to forni an enlarged circular opening f2, which opening is directly in fr'ont of the knife C and through which the operator can see the line of the pattern and the front edge of the cutting knife.

The presser foot is supported by a leg or post Il extending upwardly tlrcr'efr'orn and terminating in a toothed rack G which is actuated by an adjusting device upon tlre frame B for raising and lowering the presser foot. The toothed rack G preferably passes through and is guided by a vertical groove zy in a block or casing II suitably secured to the frame l5 above the kni fe C by screws W, or any other' desired means.

I represents an adjusting shaft which is journaled in a hollow boss or portion of the block or casing H and has secured to it within said boss a pinion K which meshes with the toothed rack G. A locking disk or device L is also secured to or forrned on the shaft I beside the pinion K within the hollow boss or casing. One end of the shaft I extends beyond the casing II and has secured thereon a milled head or finger' wheel M by turning which the shaft and pinion can be operated to raise or lower' the rack.. r`he adjusting shaft is screwthreaded between its head M and the side of the Cas ing, and a threaded locking nut or sleeve N with an enlarged milled head or portion works on the threaded portion of the shaft, suitable washers being preferably provided between this locking nut and the side of the easing to prevent the locking nut from being held against rotation with the shaft by friction against the casing and thereby tending to lock the shaft when it should be released.

The locking disk L is of somewhat greater diameter than the pinion I( so' that it bears against one side of the rack bnr G, as shown in Figs. S and 4. The locking disk L and pinion I( are capable of a limited sidewise or longitudinal nrovernent in the casing, and when the locking nut is tur'ned in one direction it draws the locking disk over against the rack bar and firmly clamps the latter in its guideway.

The operation of the device is as follows: W hen the locking nut N is released, the pinion and its rack are tree to move and the presser l'oot can be raised or lowered to any desired position by turning the adjusting head or wheel M, the locking nut N turning,- with the shaft I and thus maintaining its released position. When the presser oot has been adjusted to the desired height, the locking nut is turned on the shal't l, thus drawing the locking disk or member L into l'rictional engagement With the side of the rack G and locking' the saine in position against lurther movement.

The enlarged opening f1 in the knife-slotted heel portion of the presser toot enables the operator to clearly see the line of the pattern directly in advance of the moving knife as the machine is being,l operated, While the contracted portion ol` the slot adjacent to the sides of the knife and the edge ot' the standard serves to prevent any lifting or disarrangement ot' the layers oi cloth resulting i'rom the action ot the knife and the movement ol" the machine.

l claim as my invention:

i. The combination ot' a presser toot. or the like, a movable rack connected thereto, a pinion engaging' said rack a locking' member connected to said pinion and adapted to engage said rack. and means tor moving, said locking mem ber into engagement with said rack tor locking; the same. substantially as set forth.

2. The combination ot a presser toot. or the like. a movable rack connected thereto. a guide for said rack. a pinion engaging.; said rack, a locking; member adjacent to said pinion and adapted to ena-age said rack, and means tor moving; said locking member to clamp said rack between said lockingl member and said guide for locking the same, substantially as set torth.

2. 'lhe combination ot a presser toot or the like, a movabie rack connected thereto, an adjusting shaft, a pinion on said siatt engaging said rack, a locking member secured to said shaft adjacent to said pinion, and means for moving said shaft to brine; said lockingl member into en sagement with said rack for locking the same, substantiail as set forth.

l. 'lhe combination ot' a presser toot or the like, a movable rack connected thereto. an adjustingl shaft, a pinion on said shatt ei gina' said rack, a locking member secured to said shatt' adjk centi to said pinion, and a device having,- a screw-threaded el gement with said shaft t'or moving; the same to bring aid lockingl member into engagement with said rack. substantially as sel.' forth.

3. 'llie combination of a presser foot or the like, a movA able rack connected thereto, a guide for said rack, an adjusting shal't. a pinion on said shafty en;.;agin asaid rack, a locking' member secured to said shaft adjacent to said pinion. and means tor movin;Y said shaft to clamp said rack between said locking member and said guide for locking: the same. substantially as set forth.

ti. In a cloth cutting' machine, the combination of a presser toot, a movable rack connected thereto, a supportingblock secured to said machine and havingl a guide for said rack` an adjusting shatt journaled in said block, a pinion on said shatt eng'agiiml said rack, a locking member secured to said shal't adjacent to said pinion. and means for moving' said shaft to clamp said rack between said locking;l member and said ;'uide for lockingl the same. substantially as set torth.

7. In a cloth cutting` machine` a presser foot having a slot through which the knite passes. said slot having a contracted rear portion adapted to embrace the knife, and an enlarged portion adjacent to the cuttingr edge of the knife throne-h which the pattern directly inl advance of the knife ean be seen, substantially as set forth.

Witness in v hand, this 12th day oi' November, 1906.

FREDERICK J. CLARK.

Witnesses z L'. l. S'rnvnx'soN, E. C. Hann.

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