US223744A - Alexander malm - Google Patents

Description

A. MALM. w Machine for Cutting Paper.v

No. 223,744. Patented Jan. 20, 1880.

Enga. Eug.

N.PETERS. PHOTO-LITHOGRAPRER. WASHINGYON, D` c,

UNITED STATES PATENT i OFFICE..

ALEXANDER MALM, OF BROOKLYN, NEW 'YOBIQ ASSIGNOR TO EDWIN R. SHEBIDAN AND THEODORE W. SHERIDAN, OF SAME PLAGE,

MACHINE FOR UTTING PAPER.

SPECIFICATION forming part of Letters Patent No. 223,744, dated January 20, 1880. Application filed November 18, 1879.

To all whom t may concern Beit known that I, ALEXANDER MALM, of4

had to the accompanying drawings, in whichi Figure l representsa front view of a cutter embodying my invention. cross-section of the same in the line a: x, Fig. l. Fig'. 3 is a horizontal section thereof in the line y y, Fig. l. i

pecially that class of machines in which the resistance offered to the knife lby the paper to be cut reacts upon the clamp.

In the drawings, the letterA designates the machine-frame supporting a table, B, upon which the laminee of paper` or other material rest during the cutting operation. O is the clamp, and D the knife, both arranged above the table B, the knife being suspended from a cross-head, A', by means of oblique links a. The clamp C is joined to a slide, O', by means of rods b b passing-through the table B, while theknife D is connected to a slide,D/,by means of alever, E, and rod E', both slides being guided in vertical ways formed 011 the lower part of the machineframe. The effect of these connections of the clamp and the knife with their slides C D is that the correct movementsof the clamp and knife are obtained by reverse motions of the slides. To produce these motions of theslides GD, I make use of a shaft, F, which is situated between the slides, and which carries pinions e f, meshing with racks c d upon the slides.

The shaft Fis fitted in vertical slots g formed in the machine-frame, so that vit is capable of a compound revolving and up-and-down motion, and when the clamp C and knife D are in an upper position the shaft rests in the lower ends ofthe slots, as shown in Fig. 2.

When a revolving motion is imparted to the shaft F in the direction indicated in Fig. 2 the pinions e f act upon the racks c d, and the clamp-slide C' receives a downward motion, While the knife-slide D moves upward, caus- Fig. 2 is a vertical Similar letters indicate corresponding parts. My invention relates to machines for cut-j ting paper and other like materials, and esthe knife.

ing the simultaneous descent of the clamp and the knife. The shaft F remains at the lower end of the slots g until the` clamp O is brought to bear on the paper to be cut, and the clampslide C ceases its motion, when the pinions e,

meshing with the racks c of `that slide, climb with the resistance of the paper, this increasing resistance is added to the tractive action of the shaft on the clamp-slide C', so that the resistance offered to the knife reacts upon the clamp, and the pressure of the latter is proportionate to` such resistance.

The lever' E, whereby the knife D is counected to its slide, has its fulcrum on a pivot, o, which is so arranged that it allows the clamp C to descend with greater speed than It follows that the clamp C is brought to bear on the paper before the knife D begins to cut, and the correct operation of the machine is insured. The effect of this accelerated movement of the clamp G is increased by arranging the latter in advance of the knife.

When the clamp C ceases to move and the pinions e climb up on the racks c, thereby causing the shaft F to rise, as before stated, the upward motion of the shaft is added to the revolving motion thereof, in its action on the knife-slide D', the effect of which is to increase. the speed of the knife; and since this occurs just before the knife begins to cut, the latter forces its way through the paper with an accelerated movement. thus gained is a saving of time.

A revolving motion is imparted to the traveling shaft F from a driving-shaft, G, and the motion of the driving-shaft is reversed, as hereinafter described, when the paper has been cut and before the knife D strikes the table The advantage n IOO B, so that the traveling shaft then returns to alower position in its slots g, and both the knife D and the clamp C are caused to ascend. In `the ascent of the knife and clam p, however, the order of their movement is reversed-that is to say, the knife ascends in advance of the clamp until it clears the papel, owing to the fact thatl the shaft F reaches the lower ends of the slots g (during which time it acts on the knife-slide) before it begins to act on the clamp-slide.

To obtain -a reverse motion ofthe shaft F, I have in this example employed the following` mechanism, viz: A clutch, g', feathered upon the driving-shaftG; two pinions, h h', mounted loosely on the drivin g-shaft on opposite sides of the clutch, and both adapted to engage therewith; a transfer-wheel, H, gearing directly with the pinion h, and gearing with the pinion h through a counter-shaft, t', carrying two cog-wheels, l and a universal joint, I, connecting the transfer-wheel with the traveling shaft. If the clutch g' is thrown in gear with the pinion 7L, the latter forms the medium whereby the motion of the driving-shaft G is communicated to the wheel H, which transfers such motion to the traveling shaft F through the joint I, while, if the clutch is thrown in gear with the pinion hf, the counter-shaft 'L' is the medium of such communication, and it follows that the transfer-wheel obtains a reverse motion.

With the clutch g is combined a lever, J, which connects with a spring, j, on one side of its fulcrum, and engages a cam-wheel, K, by means of asuitable stud on the other side thereof, this cam-wheel being mounted on the shaft of the transfer-wheel H. yThe function vof the spring j is to throw the clutch g in gear with the pinion h, while that of the cam-wheel K is to retain the lever in the position to which it is moved when the clutch is thrown in contact with the other pinion.

What I claim as new, and desire to secure by Letters Patent, is-

l.' The combination, in a paper-cutter, of a revolving shaft adapted to move or travel at a right angle to its longitudinal axis with the clamp-slide G and knife-slide D', both geared with said shaft by means of racks and pinions, substantially as and for the purpose described.

2. The combination, with the traveling shaft F, of a driving-shaft and reversing mechanism consisting of the clutch g', two loose pinions, h h', transferwheel H, countershaft fz?, and universal joint I, all constructed and adapted to operate substantially as described.

3. The combination ofthe clutch-lever J, its spring j, the cam-wheel K, and the knife D with the clutch g', pinions h h,transfer-wheel H counter-sh aft t', traveling shaft F, and joint I, all constructed and adapted to operate substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand and seal this 17 th day of November, 1879.

ALEXANDER MALM.

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