US775434A - Paper trimming or cutting tool. - Google Patents

Description

No. 775,434. A PATENTED NOV. 22, 1904. H. S. WILLIAMS.

PAPER TRIMMING OR CUTTING TOOL.

APPLIOATION FILED JAN.16, 1904-. N0 MODEL.

SMUQWTOL Jiariy 6. William attorney.

IINTTED STATES Patented November 22, 1904.

PATENT Trice.

HARRY S. WVILLIAMS,

RIDGELY TRIMMER PORATION OF WEST VIRGINIA.

PAPER TRIMIVIING OR CUTTING TOOL.

SPECIFICATION forming part of Letters Patent No. 775,434, dated November 22, 1904.

Application filed January 16, 1904.

T (I/ZZ whom, it may concern.-

Be it known that I, HARRY S. WILLIAMs, a citizen of the United States, residing at Springfield, in the county of Clark and State of Ohio,

have invented certain new and useful Improvements in Paper Trimming or Cutting Tools, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to paper-trimmers used for trimming the edges of wall-paper and for cutting window-shades and for performing similar work.

The present invention has special reference I5 to features of construction designed to prevent any longitudinal play or lost motion of the shaft or arbor of the cutting-disk in its bearing and to take up any lost motion con sequent upon wear.

The device as a whole is of the type embraced in Letters Patent granted to Charles T. Ridgely January 29, 1895, Nos. 533,374 and 533,37 5, and on the 14th day of July, 1903, No. 733,511, all of which are now owned by my assignee of the invention herein set forth, The Ridgely Trimmer Company.

In the accompanying drawings, forming a part of this specification, and on which like reference-letters indicate corresponding parts,

paper-trimmer looking toward the head thereof; Fig. 2, a longitudinal sectional view of the tool on the line a w of Fig. 1 looking downward, and Fig. 3 a vertical sectional view on the line y y of Fig. 1.

Referring first to the device or tool generally, the letter A designates the head of the trimmer, being the part which carries the arbor of the cutting-blade, and the letter B designates the gage or that part which travels upon a straight-edge to guide the tool in use, the straight-edge being laid and held down upon the material to be trimmed or cut and the gage being adapted to be slid along on the straight-edge, by which it is supported and guided, while the blade is pressed onto the material and trims or cuts it.

down

The

Figure 1 is a side elevation of such type of Serial No. 189,240. (No model.)

gage has ways or guides C, which match with and fit on guide-strips on the straight-edge. Of course I do not illustrate the straight-edge, since it is no part of the present invention and is merely used in connection with the tool, very much like a bench is used to support the material to be out. There is a pivotal connection between the head A and the gage B through a pivot-screw D, mounted in the head and screwed into the gage, as clearly shown in Fig. 2, and there is a spring E coiled about the pivot-screw, having one end in engagement with the gage and the other in similar I engagement with the head, so that the spring 1 can exert a lifting effect on the head and cause it to assume the normal position shown in Fig. 1. At the opposite side of the tool from that at which the pivot is mounted there is a guide stud or pin F, extending through a slot G in the head and screwed into the gage, which stud or pin serves the purpose of keeping the parts in proper relation at that side of the tool. A thumb or finger piece H is provided on the 1 head for assisting in manipulating and handling the tool, the extended sleeve I incidentally also forming a finger or hand support on the tool.

Coming now to the features which enter into the present invention, it will be seen that the sleeve I on its interior for a part of its length is bored out to form a perfectly smooth and true bearing J, while another part of its interior is screw-threaded, as shown at K. In the bearing J is mounted to rotate the arbor L, which carries the cutting-blade M. The arbor is shouldered, as shown at N, so as to project nearly through the blade and to form a rest upon which the blade is firmly seated and where it is held by a binding-screw O, whose head laps over on the blade and whose shank is threaded into the arbor L. In the threaded portion K of the sleeve or bearingI is screwed a take-up screw P, whose inner end engages with the rounded end Q of the arbor L. As the take-up screw can or out, it will be seen that the arbor L can be l adjusted longitudinally to keep the blade M be adjusted in' or bearing in delicate but constant contact with the gage I along the portion R of the blade, more particularly in Fig. 2. As

tween the take-up screw and the arbor the take-up screw is adjusted and resulting lost motion prevented.

These tools are accurately and thoroughly made and present nice pieces of accurate mechanism, one of the chief features of which is the preservation of trueness in the rotation of the blade and especially in its relation to the gage, which must be constant to prevent irregularities or crookedness in the edge of the wall-paper or other material which is to be cut by the blade. Hence the nicety of the adjustment required and the accuracy of the fitting of the parts and the maintenance of such fitting. The action of this take-up screw in conjunction with the arbor, together with the blade and its contact with the gage, perfectly carries out these requirements.

Having thus fully described my invention,

as shown what 1 claim as new, and desire to secure by wear takes l Letters Patent, is-- place between the blade and the gage and bel A paper-trimmer comprising, in combination, a gage having an extended vertical bear ing-surface, and a head vertically movable relatively to said gage, said head being provided with a bearing and a take-up screw threaded into and forming the outer end of said bearing, and a cutting-blade having an arbor mounted in said bearing with one of its ends in contact with and adjustable by the inner end of said take-up screw, said blade contact ing with the bearing-surface of the gage, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

' HARRY S WILLIAMS.

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