US1053331A

US1053331A - Electric cloth-cutting machine.

Info

Publication number: US1053331A
Application number: US55500210A
Authority: US
Inventors: Edward M Waring
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-04-12
Filing date: 1910-04-12
Publication date: 1913-02-18
Anticipated expiration: 1930-02-18

Description

E. M. WARING. ELEG'PRIC CLOTH CUTTING MACHINE.

APPLICATION FILED APR. 12, 1910.

Patented Feb. 18, 1913.

EDWARD M. WARING, OF BROOKLYN, NEW YORK.

ELECTRIC CLOTH-CUTTING MACHINE.

Specification of Letters Patent.

Patented Feb. 18, 1913.

Application filed April 12, 1910. Serial No. 555,002.

To all whom it may concern a Be it known that I, EDWARD M. WARING, a citizen of the United States of America, and a resident of Brooklyn, Kings county, New York, have invented certain new and useful Improvements in Electric Cloth-(gutting Machines, of which the followlng 1s a specification. I

This invention relates to electrically operated cloth cutting machines having a reciprocating knife.

More particularly it relates to improve-' ments in the knife guard and the sharpening means for the knife, also to improvements in the bearings for the armature shaft of the motor and the manner in which the knife is operated from said motor, and to other novel structural features. I

The objects of the invention and the means provided for attaining the same is fully set forth in the following specification while reference is had to the accompanying drawing in which Figure 1 is an elevation of a cutting machine embodying my invention with parts omitted for the sake of clearness. Fig. 2 is a front view of the machine with parts in section. Fig. 3 is a sectional detail view of the knife guard on line 33 of Fig. 1. Fig. 4 is a detail view of theguard hinge. Fig. 5 is a detail view of parts of the sharpening means, and Fig 6 is a-detail view showing the manner of pivoting the arm carrying the sharpening wheels.

In the drawings the reference numeral 7 represents the base of the machine from which rises a column 8 supporting the motor and its associated parts, 9 is the knife guided in the column 8 in the usual manner and 10 is the motor constructed in an suitable manner.

11 is the armature shaft and 12 and 13 de- I note end disks on said armature.

The motor. and its associated parts are protected by two

end casings

14 and 15. Each of these casings supports a ball hearing for the armature shaft 11. This latter is at each end provided with a grooved disk 16. The casings are each provided with a greatly assist in the smooth and noiseless upward into the running of the machine. Adjacent the aforesaid disk 13 there is keyed to the shaft an eccentric 20 and to counterbalance this eccentric a weight 21 is keyed and clamped to the shaft 11 diametrically opposite'the eccentric. The weight is provided with inclined surfaces 22 serving as fan blades to cool the motor during the operation thereof. The eccentric-20 carries a strap 23 and between these two elements there is interposed a ball bearing comprising the inner race 24,

the balls and the. outer race 26.

The knife is secured to a. crosshead 27 reciprocated in guides as is usual and operated from the eccentric by a pitman 28, the

upper end of which is pivoted at'29 to the strap, while the lower .end of the pitman is pivoted at 30 to the crosshead." By means of this construction compensation for wear on the crosshead and adjacent arts is provided, also for slight inaccuracies in the assembling of these parts. It will be noted that the axis of the pivot 29 is at right angles to the axis of the shaft 11, while the axis of the pivot 30 is parallel thereto. Hence the lower end of the pitman may be adjusted to run true under the strap 23 without disturbing the latter. I also find, that by interposing the ball bearing between the strap and the eccentric the wear and tear on the machine is less and the knife operates with great ease.

The improved knife guard comprises an upper and a

lowerstem

31 and 32 hinged together at 33. Each of the said stems carries a foot 34 comprising rearwardly extending lips 35 enveloping the knife and a forwardly extending finger 36. Each foot is cut away as at 37 to permit the operator to observe the chalk marks or lines on the material. This will be clear from Fig. 3 in which such a line is indicated at 38'. The guard .is adjusted vertically and. clamped by a screw 39.

- When the material to be cut comprises but a few layers the guard ma be used as shown in Fig. 1. That is the lower foot is adjusted to the proper height and the material is guided between the foot and the base. If it is desired to sharpen the knife or for other reasons the lower foot may be swung.

'osition shown in dotted lines. When the fbot is again swung down to guard the knife it is not necessary to readjust it. I

' If the material to be cut comprises many s rin bears a ainst a shoulder 41 on the P e g upper stem to prevent the lower stem from falling. From this it will be'clear, that this guard admits of wide adjustment in an easy manner, that it may be set for two thicknesses of material at once, as for instance, when the difference in thickness between the two layers of material equals the difference in height between'the two guard feet, also, that the guard foot when once it is set, may

be swung away from the knife and back without disturbing the adjustment. Fi-

nally the guard may be removed altogether by loosening the screw 39.

During the operation of machines of this characterit becomes, necessary to sharpen the knife frequently. Consequently the sharpening means must be so arranged that they may be quickly applied and as quickly removed from'contact with the knife. To accomplish these objects the following means are provided.

542 denote abrasive wheels mounted on shafts 43 secured in a bracket 44 and driven in opposite directions by the gears 45 fast on said shafts. The bracket 44 is carried by a two p'. arm 46 pivoted on' a stud 47 fast in the frame of the machine as shown in Fig. 2. On the said stud is further mounted a sleeve 48 which is capable of a limited rotary movement on the stud, the said movement being limited by a pin 49 fast in the stud, as will be further explained. In the outer end of the said sleeve there is journaled a short shaft 50- carrying a friction drive wheel 51 adapted to be rotated by contact withthe armature disk 12 aforesaid. Between this wheel and the one abrasive wheel shaft 43 is interposed a flexible shaft 52, so that when the wheel 51 contacts with the disk 12.and the motor is running the abrasive wheels are rotated.

WVhen the knife is sharpened the wheels 42 are swung upward as shown in Fig. 1 so as to ermit the guard to be moved down into p ace. As the abrasive wheels move up, the friction wheel 51 is moved down away from the disk 12 until the end-of a slot 52 in the sleeve 48 abuts the pin 49. A second slot 53 in said sleeve permits movement of the sleeve in the opposite'direction, to the right in Fig. 5, to the left in Fig. 1. The movement of the friction wheel in opposite direction to the movement of the abrasive wheels is caused by the flexible shaft 52 The end casing 14 is cut away as at 54 to permit the friction Wheel to be moved into and out of contact with the disk 12. A spring catch 55 serves to keep the arm 46 up. nother spring 56 is wound around the hub of the arm 46 and the free end of the spring bears against the casing 12 so as to exert a pressure tending to keep the wheels 42 in contact with the knife while the latter is being sharpened. The abrasive wheels are kept together by a spring 57 which pinches the lower ends of the shafts 43 so as to take up wear on the wheels. To permit this spring to act the said shafts 43 are mounted somewhat loose in the bracket 44 to admit of a slight play. This is indicated at 58 in Fig. 1 in dotted lines.

From this it will be seen that the sharpening means are very simple and are quickly put into use and driven by friction from the motor. Also the abrasive wheels may be adjusted vertically by the screw 59 so as to sharpen all of that part of the knife which does the cutting.

-The above is thought to fully illustrate and describe this invention, its construction and operation. It will be observed that this particular form of guard is applicable to straight knife machines only, but that some of the other novel features described may be applied to rotary knife machines also. The means described are susceptible of many changes and I claim all such changes and variations as come within the legitimate and intended scope of the claims.

I claim 1. The combination of a knife, a motor for operating the same, an armature shaft in said motor, end casings for the motor, ball races fitted in said end casings, large grooved disks secured to the extreme ends of the said armature shaft and balls confined between the said ball races and the said grooved disks.

2. The combination of a. knife, a motor for operating the same, end casings for said motor, sharpening wheels for said knife, a friction wheel for driving the said sharpening wheels from the said motor and an opening formed in the one end casing for permitting the said friction wheel to be moved into and out of cont-act with the said motor.

3. The combination of a knife, a motor for driving the same, abrasive wheels for sharpening the said knife and means for exerting a pressure on said wheels in two different directions, one pressure being exerted in a direction parallel to the plane of the knife, the other pressure being exerted at right angle to the plane of the knife.

4. The combination of a knife, a motor for operating the same, abrasive wheels, mechanism for moving the same into and out of contact with the said knife, a friction wheel adapted to contact with the said ment of the said friction wheel independentof the movement of the said abrasive wheels.

5. The combination .of a knife, a motor, an eccentric fast on the armature shaft of the said motor, a strap carried by the said eccentric, a pitman for operating said knife from the said motor, the said pitman being pivoted to the said strap at right angles to the aXis of the said armature shaft.

6. The combination of a knife, a motor, a circular strap rotated by the said motor, a pitman for operating the said knife from the motor, the one end of said pitman being connected to the knife, the other end of the pitman being pivoted to the said strap, the axis of the said pivot being at right-angle to the plane of the said knife.

7. The combination of a knife, a motor for operating the same, ancupper and a.

lower guard foot for said knife and means for moving the lower ard foot toward and away from the knife 8; The combination of a knife, a motor for operating the same, an upper and a lower guard foot for the knife and means for moving the lower guard foot toward and away from the knife without disturbing the position of the upper guard foot.

9. The combination ofia knife, a motor for driving the same, a guard comprising an-upper stem, a lower stem hinged to the upper one, a spring on said lower stem for holding the latter in two diiferent'positions with relation to the upper stem and a guard' foot secured to each of the said stems.

10. The combination of a knife, a motor for driving the same, a guard for said knife containing an upper and a lower guard foot, each guard foot comprising lips adapted to envelop the said knife, a finger extending in opposite direction to the said lips and a cut away portion formed between the said lips and the saidfinger to enable the operator to observe the cutting marks on the ma terial to be cut by the said knife.

Signed at New York, N. Y., this 30 day of March 1910.

EDWARD M. WARING. Witnesses:

IVAN Komesnnne, K. G. 1 mm);