US665167A - Cloth-cutting machine. - Google Patents

Description

.No. 665,l67. Patented Ian. I, 190i.

|.' BLIJCK.& J. B. aunv.

CLOTH CUTTING MACHINE.

(Application filed Apr. 9. '1900.) (No Model.) 2 Sheets-Sheet l.

' Fig.1. 16

Ike Block J1 B. Gury v "UNITED STATES ATENT OFFICE.

IKE BLOCK AND JOHN B. GURY, on ST. LOUIS, MISSOURI.

CLOTH-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 665,167, dated January 1, 1901.

Application filed April 9 1900. serial No. 12,080. (No model.

To all whom it may concern.-

Be it known that we, IKE BLOCK and JOHN B. GURY, citizens of the United States, residing at the city of- St. Louis, in the State of Missouri, have invented a certain new and useful Cloth-Cutting Machine, of which the following is such afull, clear, and exact description as will enable any one skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

Our invention relates to that class of clothcutting machines in which a rotary cutter driven by a suitable motor cooperates with a plate adapted to slide beneath the cloth and be guided by a suitable handle.

Our invention consists in various novel features and details of construction described in the following specification and pointed out in-the claims affixed hereto.

In the accompanyingdrawings, which illustrate a cloth-cutting machine made in accordance with our invention, Figure 1 is a side view. Fig. 2 is a View of a portion of the machine, showing the grinding device in perative position. Fig. 3 is a front view of the part shown in Fig. 2. Figs. 4 and 5 are enlarged views showing details of construction. Fig. 6 is an enlarged side view of a portion of the machine, the knife and parts of the casing being removed to better show the gearing. Fig. 7 is a section showing the antifriclion-bearing for the motor. Fig. 8 is a section on the line 8 8 of Fig. 6, and Fig. 9 is a section on the line 9 9 of Fig. 6.

Like marks of reference refer to similar parts in the several views of the drawings.

10 is the foot-plat.e, which is beveled from the center toward the edges in the usual manner, so as to allow it to slide easily beneath the cloth. Carried by the foot-plate 10 is a standard 11, on which is mounted the rotary cutter 12, which cooperates with the footplate 10. Secured t0 the upper part of the standard 11 is the frame 13 ofan electric motor. 14 is the field-coil, and 15 the armature, of said motor.

16 represents the brushes.

The rotary cutter .12 is driven from the armature 15 of the motor by means of gearing contained in the standard 11 and a gear-case The handle 18, by means of which the oted to the upper part of the standard 11 by means of the pivot 21. The pivot 21. is held in position by means of a set-screw 22, the end of which projects into an annular groove 23, Fig. 4, in the said pivot 21.

24 is a boss formed on the standard 11 and surrounding the pivot 21. In the boss 24 is a depression 25, which receives a spring-detent 26, which tends to keep the bar in a horizontal position. Pivoted to the bar 20 by means of a screw 27 is a U-shaped frame 28. Contained in the bar 20 is a coil-spring 29, which tends to move the U-shaped frame upwardly. Loosely mounted on the U shaped frame 28 are two grinding- wheels 30 and 31, which are preferably slightly conical. ends of the arms of the frame 28 are connected by a bar 32, which is preferably bowed upward, as shown in Fig. 3, so as to prevent its coming in contact with the edge of the rotary cutter 12. Carried by the bar 32 is a ring 33, which serves as a handle for operating the grinders 30 and 31. A, Fig. 2, represents a radius of the rotary cutter 12 passing through the center of the grinding-wheel 30, and B represents the axis of said grinding-wheel 30. It will be obvious that if line B, representing the axis of the grinding-wheel, was in a plane perpendicular to the plane of the cutter 12 and including the axis of the cutter the grinding-wheel would simply be rotated by friction when brought in contact with the rotary cutter 12 and would have little or no cutting effeet. When the axis of the wheel is set at an angle, however, as shown in Fig. 2, the wheel will be drawn across the bevel of the knife and have a cutting effect. the wheel will be worn away but a comparat-ively small amount.

34 is a screw acting as an adjustable stop for limiting the movement of the frame28 in the direction of the plane of the cutter 12. The screw 34 is adapted to come in contact with the standard 11.

35 is a screw adapted to come in contact with a lug 36 on the standard 11 and act as an adjustable stop for limiting the lateral movement of the frame 28.

At the same time The gear-wheel 45.

38 is a horizontal spiral gear-wheel which is contained in the gear-casing 17. The gearwheel 38 is secured to a stud 39, passing through a cup 40, secured in the upper part of the gear-casing 17. The shaft 41 of the vertical armature 15 is secured in the stud 39. The gearwheel 38 is prevented from coming off the stud 39 by means of a locknnt 42, provided with threads running in the opposite direction from those on the interior of the gear-wheel 38. Between the lower face of the cup 40 and the upper face of the gear-wheel 38 are placed balls 43 and between the head of the stud 39 and the cup 40 balls 44. The horizontal spiral gear-wheel meshes with a vertical spiral gear-wheel 45, contained in the upper part of the standard 11.

46 is a boss carried by the upper part of the standard 11.

47 is a cone having a projecting portion which is screwed through the boss 46 and cooperates with a cone 48, surrounding the boss 46. Between the cones 46 and 47 and the gear-wheel are placed balls 49. The cone 47 is held in place by means of a screw 50. The screw 50 preferably passes entirely through the cone 47 and receives a screw 5], which holds in position a plate 52, which protects the gear-wheel 45 from lint, dust, or the like. The vertical spiral gear-wheel 45 meshes with a second vertical spiral gear-wheel 54, which is mounted in a manner similar to the The gear-wheel 54 is provided with a hub 55, which receives the rotary knife 12. The knife 12 is held in position by means of a screw-threaded washer 56.

The frame 28 will be normally held in the position shown in Fig. l by means of the spring 29, the head of the screw 34 being held in contact with the field-coil 14 of the magnet. If it is desired to sharpen the cutter 12, the motor is set in operation and the frame 28 forced downwardly by means of the handle 33, the screw 34 being first set to properly limit the downward movement of the frame. The screw 35 is now set so as to properly limit the lateral movement of the frame, and the frame is moved laterally, so as to force the grinding-wheel 30 against the cutter 12. The grinding-wheel 30 is rotated by contact with the cutter 12 and by reason of its axis being set at an angle to the radius of the cutter will produce a drawing out on the bevel of the cutter 12. As soon as the cutter has been sharpened by the wheel 30 the wheel 31 is moved lightly against the opposite side of the cutter to remove any bur or wire edge. As soon as the frame 28 is released it will move back into the normal position. (Shown in Fig. 1.)

The gearing of our machine, while simple of construction and containing a very small number of gear-wheels, is such as to allow the weight of the motor to be distributed evenly on the foot-plate of the machine, thus rendering the machine easy of operation.

Having fully described our invention,what we claim as new, and desire to secure by Letters Patent of the United States, is

1. In a cloth-cutting machine, the combination with a foot-plate, of a rotary cutter cooperating therewithnneans for actuating said cutter, and a grinding-wheel arranged with its axis substantially parallel to the plane of the cutter so as to present its periphery to saidcutter, the axis of said grinding-wheel when in operative position being arranged at an angle to a plane perpendicular to the cutter and passingthrough the center of the cutter and the grinding-wheel.

2. In a cloth-cutting machine, the combination with a standard, of a rotary cutter, means for actuating said cutter, a frame pivotally mounted on said standard to swing in the plane of the cutter and also to swing laterally, and a pair of grinding-wheels loosely mounted on said frame with their axes substantiall y parallel to theplane of saidcntter so as to present their peripheries to said cutter.

3. In a cloth-cutting machine, the combination with a standard, of a rotary cutter, means for actuating said cutter, a frame pivotally mounted on said standard to swing in the plane of said cutter and also toswing laterally, and a pair of grinding-wheels loosely mounted on said frame with their axes substantially parallel to the plane of said cutter was to present their peripheries to said cutter, the axes of said grinding-wheels when in operative position being arranged at an angle to a plane perpendicular to the cutter and passing through the center of the cutter and the grindiug-wheels.

In testimony whereof we have hereunto set our hands and seals in the presence of the two subscribing witnesses.

IKE BLOCK. [L. s.] .1. B. GURY. [n s.] Witnesses:

W. A. ALEXANDER, RoY GRAY,

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