US619397A - Cutter - Google Patents

Description

Patented Feb. I4, I899.

B. A. DE COSTA.

CUTTER.

(Application filed Nov. 10 1896. Renewed Sept 27, 1898.)

(No Model.)

WITNESSES @mnko TOR Wow;

flttorney UNITED STATES PATENT OEEmE.

BRAULIO A. DE COSTA, OF RYE BEACH, NEW HAMPSHIRE.

CUTTER.

SPECIFICATION forming part of Letters Patent No. 619,397, dated February 14, 1899.

Application filed November 10, 1896 Renewed September 27,1898. Serial No. 692,032. (No model.)

To all whom it may concern.-

Be it known that I, BRAULIO A. DE COSTA, a subject of the King of Spain, residing at Rye Beach, in the county of Rockingham and State of New Hampshire, have in vented certain new and useful Improvements in Combination- Tools; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in hand-cutters, and has more particular relation to cutters for trimming the edges of wallpaper.

The invention consists of certain novel constructions, combinations, and arrangements of parts, all of which will be hereinafter more particularly set forth and claimed.

In the accompanying drawin gs,formin g part of this specification, Figure 1 represents a perspective view of the device embodying my invention, taken from the front. Fig. 2 represents a rear elevation of said device, and Fig. 3 represents a central vertical section through said device upon the line of the graduated knife-supporting arm.

A in the drawings represents the guideplate, B the adjustable knife-supporting arm, and O the cutting-knife. Said plate A is provided with a suitable handhold-aperture a and with supporting antifriction-rollers a, extending laterally from the same near the lower edge and supported in position by brackets a suitably secured to said plate A. A guide strip or flange a is also mounted upon said plate A to assist in guiding the same over the edge of the table. The knife-supporting arm B is preferably rectangular in cross-section and is mounted in a square aperture a formed in the upper portion of the plate A. This arm B is provided upon its under side with rack-teeth b, that are adapted to be engaged bya fluted roller 1), journaled in brackets b mounted upon the back of plate A. The said roller 1) is rotated to adjust said arm B in and out in relation to the plate A by an operating-handle 11 connected thereto. A screw-bolt 19 passes down from the top of the plate A and is adapted to engage the broad surface of the arm B to lock said arm firmly in any of its adjusted positions. The upper surface of said arm B is provided with a graduated scale b by means of which the exact width of cut to be made may be secured at will by simply bringing one of said graduations in line with the edge of the passage 0. through said plate A. The outer end of said arm B is bifurcated, as at 6 to receive the shank c of the cutter O. Said shank is provided upon one of its faces with rack-teeth c, that are adapted to be engaged by a fluted roller 0 journaled in said bifurcation b so as to bind the shank 0 between its inner surface and the inner end of the slot 1). The said roller 0 is operated so as to raise or lower the shank c by a suitable operatinghandle 0 connected thereto. The said knife 0 is held in any of its adjustable vertical positions by means of the screw-bolt 0 that screws through one side of the bifurcated end of the arm B and engages the edge of said shank c to bind said shank firmly in position. The knife 0 is preferably formed with a lower segmental cutting edge 0 ,50 that when pushed over the paper said knife will not drag and tear the same, but will cut evenly with a slashing action.

It will be observed from the foregoingdescription that the exact adjustment of the cutting-knife B may be secured at will by simply turning the operating-handles b or c and locking the parts firmly in position by the adj usting-screws b or c.

To operate the device, the wall-paper is first placed upon the operating-table and the cutter adjusted to cut the desired margin from the same. The plate A is then placed against the edge of the table, with the rollers a resting upon the top of the same, and as the said plate is forced forward the cutter C engages and cuts the exact desired margin from the paper. The operation is quick and accurate, as the cutting-knife C is positively guided along the whole length of the strip by the plate A and cannot turn to one side or the other. There is very little friction to retard the forward motion of the plate A, as the rollers ct, resting upon the top of the table, reduce this friction to a minimum.

By the employment of my invention a much straighter cut may be made than has heretofore been possible by any hand cutting device. This improved cutter is altogether detachable,and when taken apart maybe packed into a very small space, so as to be easily carried about in the wallpaperers kit. The knife C can be taken out for sharpening or repairs, when so desired, and instantly inserted again without in any 'way disturbing the remainder of the device. In practice it is desirable to provide the table upon which the paper is to be cut at each end with a stop or guiding piece, so that as the paper is pulled forward with one hand it will always be kept the desired predetermined distance from the edge of the table, so that the knife may be pushed forward with the other hand and cut the margin therefrom. This peculiar action of pulling the paper forward with one hand from the roll and pushing the cutter forward with the other hand enables the operator to work with great rapidity and with the expenditure of very little energy.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a cutter, the combination with a guiding-plate adapted to be passed along the edge of the table and provided with a suitable handhold, of a supporting-arm mounted in said plate, and means for moving said arm to the desired position and locking it in such position, and a cutting-knife mounted in the outer end of said arm, substantially as described.

2. In a cutter, the combination with a vertical guiding-plate, of a plurality of spaced brackets mounted upon said plate so as to project laterally therefrom, antifriction-rollers mounted in said brackets in a horizontal position, an arm adj ustably mounted in said plate, and a cutting-knife mounted on the end of said arm, substantially as described.

3. In a cutter, the combination with a suitable guiding-plate adapted to be passed along the edge of the table, of a supporting-arm mounted in said plate and provided with aracked surface, a toothed wheel mounted on said plate and adapted to engage said rack for adjusting the arm to the desired position, and a cutting-knife mounted upon the outer end of said arm, substantially as described.

4. In a cutter, the combination with a suitable guiding-plate adapted to be passed along the edge of the table, of an arm adjustably mounted in said plate, a toothed wheel mounted in the end of said arm, and a cutting-knife having a racked shank which is mounted in said arm so as to engage said toothed wheel whereby the cutter may be raised or lowered at will, substantially as described.

5. In a cutter, the combination with a guid ing-plate adapted to be passed along the edge of the table, of an arm adjustably mounted in said plate, means for moving said arm to the desired position, and an auxiliary locking-bolt mounted in said plate and adapted to engage said arm for locking the same in its adjusted position, substantially as described.

6. In a cutter, the combination with a guiding-plate having a plurality of spaced antifriction-rollers, of a guiding-strip mounted on said plate between said rollers, an arm mounted in said plate, and a cutter mounted at the outer end of said arm, substantially as described.

7. In a cutter, the combination with a suitable guiding-plate adapted to be passed along the edge of a table, of a supportingarm mounted in said plate, and a cutting-knife provided with a vertical shank and mounted in the end of said arm, and means for ad j usting said shank in said arm and looking it in the desired adjusted position, substantially as described.

8. In a cutter the combination with a suitable guiding-plate adapted to be passed along the edge of a table and provided with antifriction-rollers, and a handhold, of a graduated arm mounted in said plate, means for adjusting and locking said arm in any desired position, a knife mounted in the outer end of said arm, and means for adjusting said knife in the desired position, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

BRAULIO A. DE COSTA.

Witnesses:

F. A. PHILBRIOK, F. G. IIALL.

Images