US1384107A - Cutting-machine - Google Patents

Description

E. M. WARING.

CUTTING MACHINE.

APPLICATION FILED MAY 26, 1916.

Patented July 12, 1921.v

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EDWARD MI. WARING, OF BROOKLYN, NEW YORK.

CUTTING-REACHINE.

Application filed May 26,

To all whom it may concern:

Be it known that I, EDWARD M. WARING, a citizen of the United States, and resident of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Cutting-lvlachines, of which th following is a specification.

This invention relates to improvements in electric cutting machines. One object of the invention is to provide a generally improved cutting machine. Another object 18 to provide a novel form of guard and guard operating means in. combination with the sharpening. means of the knife. 7

With these and other objects in View, my invention comprises an electric cutting ma chine as hereinafter described and as illustrated in the accompanying drawings, in which Figure 1. is a lefthand side elevation of my improved cutting machine showing the motor attached to the frame;

Fig. 2. is a right-hand side elevation of the machine showing my improved guard and grinder with controlsand other parts in position;

Fig. 3.. is a plan view of the upper part of the standard showing my improved means for bringing the sharpening device into working contact with the knife and at. the same time removing the guard from its path;

Fig. 4. is a detail plan view of the control lever and handle separated from the other parts;

Fig. 5. shows the guard or member which actually covers the edge of the knife;

Figs. 6. and 7 show respectively in plan and elevation the pivoted fulcrum for the control lever and handle shown in Figs. 8 and 4; v

' Fig. 8. shows how the guard tips sidewise to pass th grinder pull rod or any other obstruction; and

Fig. 9. shows how the guard part may be raised almost to the top of the knife to permit cutting of extra high piles of fabric.

In the drawings, thev reference numeral 15 denotes the motor of any suitable design and construction of the type having a vertical motor shaft as will be understood by those skilledin the art.

The motor is provided with hub 19 through which the armature shaft projects.

The hub 19 fits into the aperture 20 in the Specification of Letters Patent.

Patented July 12, 1921. 1916. Serial No.100,015.-

standard and is located in position by a set screw 61, see Figs. 1 and 3 and clasped securely by screws shown in Figs. 2 and 3.

The'motor may be provided with an elec tric light attachment to illuminate the work, provision is made for this as indicated at 18 in Fig. 2, which only shows what is intended to represent a tapped hole to receive a lamp socket and connecting. wires. In this position the light shines directly upon the work but is screened from the eyes-0f the operator by the motor without any other shade being necessary.

The operation of electric cutting machines in the prior art has been exceedingly clangerous and severe accidents'to the operators from contact with the knife have been of frequent occurrence because the knives of cutting machines are driven at a high rate of speed in order to cut the goods rapidly and accidental contact is almost sure to result seriously. In the past, many electric cutting machines have been inadequately guarded, some being provided with guards that are only adjustable by unscrewing a clamp near the front of the knife, a danger ous operation in itself; and all other guards that I have seen, except those of my invention, are objectionable because they are supported or hang or project over the side of the knife toward the operator and interfere with his manipulation of the goods, besides being partly in his lin of vision so that many operators of electric cutting machines work without a guard or adjust the guard to its uppermost position where it is of no value for protection. further objection to some of the guards in the prior art is that, being secured so as to partly cover the side of the knife toward the operator and away from the supporting standard they are in the way of the removal of the knife from the frame of the machine and the operator, when compelled to take the guard off or move it out of the way to change the knife, frequently leaves the guard off or in a position that affords no protection. The guard herein described and illustrated overcomes all the above objections.

Referring now to Figs. 1 to 9 inclusive the several parts of the machine are mounted upon the standard or main frame 70 which rests upon the base 71. As already pointed out, the motor is secured to the standard by clamping the hub 19 in the boss 20 in the standard. 3 1 is the knife which is mounted with a finger piece 36 on the standard and driven from the motor in a well-known manner. 33 represents the handle of the machine. 30, 31 and 32 represent means for attaching a plug and cable from a lamp socket to supply current to the motor. push buttons 56 and 57 for turning the current on and off respectively. To the standard is pivoted at 46, Fig 3, an arm 45 provided with an aperture 47. A portion 72 of said arm forms a bearing for'the fulcrum pin v38 of the guard operatinglever 37, pivoted on said arm 45, and adapted to be ad- 'usted thereon by means of a friction washer 3. The guard operating lever is provided and the opposite end 41 of said lever passes through a hole 39in a lug 40 on the knife guard 35. Thesaid lug is provided with two pins or horns 4:2, 4:3, adapted to be engaged by the guard spring 44 secured to the lever 37 as will appear hereinafter.

. The knife sharpening means are in the form of abrasive wheels 52, 53, carried by the grinder frame 51 which is pivoted to the standard above and in frontof the knife in the usual manner and which is kept in normal raised position by a suitable spring 54, see Fig. 3. The grinder frame is provided with a member 50 which is engaged by the grinder pull rod 48, as shown and which rod passes through the said aperture 47 in the arm 45 and is secured by a washer and nut 49.

From the foregoing description it will be clear that the lever 37 may be operated in a vertical plane on the pivot 38, and also, through the instrumentality ofthe arm 45,

be operated to swing outwardly from the standard on the fulcrum at 46. The guard 35 effectively covers the forward edge of the knife to a point so near the base that there is not sufiici'ent room for the finger of the operator. to pass and come in contact with the sharp edge of the knife. When it is desired to out only a few layers of cloth that will pass easily under the guard in its lowermost position, the operator merely pushes the machine into contact with the goods, following any suitable means or patterns upon the top. When it isdesired to cut a greater number of thicknesses, the operator pushes the finger piece 36 vertically downward by pressure of his fore finger until the guard 35 at the other end of the lever 37 fulcrumed at 38, is raised to the desiredheight, This upward movement may be continued until the guard 35 takes the position shown in Fig. 9. thereby exposing the maximum available cutting edge of the knife to permit the operation of the machine upon the highest piles of fabrics possible for the size of the machine in hand.

When the operator desires to sharpen the knife, he has only to press the finger piece 36 inwardly and the lever 37 carrying the guard 35 will swing outwardly away from The switch 58 is provided with the the path of the abrasive wheels 52 and 53 during which operation the arm 45, which carries the lever 37, swings horizontally on the pivot at 46 and the abrasive wheels will be brought into grinding contact with the knife through the instrumentality of the pull rod 4L8. When the pressure upon the finger piece 36 is removed, the spring 55 operates to raise the grinder frame 51 with the abrasive wheels 52 and. 53 out of contact with the knife and back into their former position and of course also operates to pull the guard back into guarding position through theintervening mechanism previously described.

When the guard 35 is adjusted to ac'commodate thick layers of cloth and operated laterally away from the knife to make room for the grinding wheels into contact with the pull rod 48 but is easily turned on the part 4.1 and after passing the same is restored to its verticalposition by the pressure due to the distortion of the spring 44: by the horn 4:2 and &3. In returning to its former position in front of the knife the guard is again tipped as it passes the pull rod and is restored as before.

From the foregoing description itwill be seen that the construction is particularly well adapted for small machines. It is an important features and of great practicaladvantage that the knife may be sharpened by the grinding wheels without detachinglthe guard fromthe machine and atthe same time provide a guard which may be operated on the far side of the machine away from the operator. It is also especially worthy of notice that the vertical adjustment of the guard is not disturbed by the grinding operation, even when the guard is adjusted to an extreme upper position, i

While I have described the invention with reference to a specific disclosure, it will be.

understood that I do not wish to be limited thereto, but that the construction may be varied within the scope of the claims. Y

I claim.

it will be brought 1. In a cloth cutting machine, the combi:

nation of aknife, a" guard for the same, sharpening wheels for said knife, a member for moving said sharpening wheels into con-] tact with the knife, a pivoted'arm for actuating the said member and a guard operating lever pivoted on the said arm.

2. In a cloth cutting machine, nation witha standard, a knife mounted on the one side thereof,a guard for saidknife supported on the other side of the standard, sharpening wheels for the knife, means for operating said guard away'from the latter to permit the lowering of said sharpening wheels into contact with the knife, said the combi means comprlsing an arm pivoted to {swing in a horizontal plane, a member connected to sa d arm and the said sharpening wheels, a guard lever'pivoted on said arm to move in a vertical plane with respect thereto and a finger piece on said guard lever for operating the latter and the said arm.

3. The combination of supporting means, a knife mounted thereon, a knife guard, knife sharpening means, an arm pivoted to said supporting means, guard operating means pivoted on said arm and connecting means between the latter and the said knife sharpening means.

4. The combination of a standard, a knife, grinding wheels for said knife, a knife guard, a guard lever for operating said guard, a rod for moving the grinding wheels into contact with the knife, a pivoted supporting member for said guard lever and rod, whereby when the said guard is moved away from the knife the grinding wheels are brought into contact with the knife.

5. The combination of a standard, a knife, a knife guard, knife sharpening means, mechanism for moving said guard away from the knife while moving the said sharpening means into contact with the knife, said mechanism comprising an arm pivoted to the said standard to swing in a horizontal plane, a guard operating lever pivoted on said arm to swing in a vertical plane and a connecting rod between the said arm and the sharpenin means.

%igned at New York, in the county of New York and State of New York, this 25th day of May, A. D. 1916.

EDWARD M. WARJING.

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