US497528A - John beading - Google Patents

Description

(No Model.)

J.` READING. WALL PAPER TRIMMER.

N0.497,5z8@ A Patentedmay 16,1893.v

f NITED STATES.

PATENT OFFICE.

JOHN READING, OF AKRON, OHIO, ASSIGNOR TO DALLAS H. READING AND HERBERT READING, OF SAME PLACE.

WALL-PAPER TRIMMER.

SPECIFICATION' forming part of Letters Patent No. 497,528, dated May 16, 1893.

Application tiled November 17, 1892. Serial No. 452,351. (No model.)

To all whom it may concern:

Be it known that l, JOHN READING, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented a certain new and useful Improvement in Wall-Paper Trimmers, of which the following is a specification.

My invention has relation to improvements in that class of wall-paper trimmers, in which two metallic disks mounted on short shafts, or arbors, journaled in substantially parallel bearings, have their faces, for al short distance of their peripheries, laterally contiguous, arranged to simultaneously revolve in opposite directions, and constitute shearing edges.

Heretofore it has been customary to enforce the contact between the disks by means of springs; and to cause a simultaneous movement of the disks by means of gear wheels; resulting in constant wear of the disks, and noise in the operation of the machine.

The object of my invention is to dispense with gear wheels and springs, and the attendent objectionable features just noted; and to produce an efticient machine, which shall be practically noiseless in operation, andin which the contact of the disks shall be automatically graduated, in proportion to the resistance offered by the paper to be trimmed; and its further object is to reduce the friction of the paper in passing the shearing disks, and to render the driving mechanism readily adjustable to compensate for stretching of the driving belt; and generally to simplify the construction and reduce the number of parts.

To the aforesaid objects, my invention consists in the peculiar and novelv construction, arrangement and combination of parts hereinafter described, and then specifically pointed out in the claims, reference being had to the accompanying drawings, forming a part of this specification.

In the accompanying drawings, in which similar reference letters indicate like parts in the diiferent figures Figure l, is a perspective view of one end of my improved wall-paper trimmer, showing the operative parts; and Fig. 2, a plan (in outline) of the same.

Referring to these drawings, A is abase, preferably of wood, on which is mounted a head block B, usually of cast metal, embodying journal bearings O, D, E, for the arbors of the upper and lower cutting disks, and the winding rod, respectively; and having a reinforced slot F, (shown in dotted lines in Fig. 1,) for the axle of the driving wheel. The

bearing D, is bored in a true line with the maf chine; and the bearing C, at a slight angle therewith, its outer end being turned to the right.

In the bearings O, D, are journaled arbors that bear on theirinner ends the beveled-edge disks G, H, respectively, and on their outer ends the band sprocket wheels I, J; the length of said arbors being such as to permit of slight longitudinal movement in their bearings, the disks being arranged to extend past each other vertically forja short distance at their point of nearest approach, and, by reason of dierencein the lines of their axles, as hereinbefore stated, to press their adjacent faces against each other at the left, or toward the front of the machine, as shown in Fig. 2, and at the point of entrance of the paper. In the bearing E, is a short shaft bearing at its outer end a sprocket wheel K, and on its inner end a longitudinally toothed head L, to receive the toothed end of the detachable winding rod M. Mounted in the slot F, and held by an inner nut, is'an axle bolt N, on which is journaled the large driving sprocket wheel O, provided with a handle P. A round endless belt Q, passes around the wheel O, and from the top, under the wheel I, and, from below, around the wheel K, to and beneath the wheel J; the part between the wheels K, andj, passing outside the other part at the point of crossing. By thus arranging and crossing the belt, the

disks are simultaneously driven in opposite ,e

lineV of intersection of `the disks, is a free roller S, to permit the paper to travel freely, and preventfrietion as it passes the shearing disks. I do not, however, by this description intend to confine my invention to sprocket wheels, as grooved pulleys may be substituted therefor With like general eect, the sprocket Wheels being preferred as affording surer traction for the belt, the pulleys and sprocket wheels be ing regarded as equivalents as herein used.

I claim as my inventionl. In a wall-paper trimmer of the class designated, the disk-carrying arbors, with their respective Wheels and disks, said disks being arranged to press laterally against each other, and the driving wheel, and the winding rod Wheel, combined with an endless belt passed about said drivingr and winding rod Wheels, and partially about the Wheels of the diskcarrying arbors, and crossed between the latter wheels and one of the other wheels, the

divergence of the portions of said belt about each disk-carrying arbor Wheel by reason of such crossing being opposite the direction in unto set my hand.

JOHN READING.

In presence of- C. P. HUMPHREY, Geo. M. WRIGHT.

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