US524933A - Bevel - Google Patents

Description

(N mam.)

W. H. COOMBS.

BEVBL.

Patented Aug. 21, 1894.

` UNITED STATES PATENT OFFICE;

WILLIAM`HENRY COOMBS, OF ROCKLAND, MAINE.

BEVELe SPECFICA'I'ION forming part of Letters Patent No. 524,938, dated August 21,1894.

` Application filed April 13, 1894. Serial No. 507,438. (No model.)

To all whom it may ooncern:

Be it known that I, WILLIAM HENRY COOMBS, ,a citizen of the United States of America, residing at Rockland, in the county of Knox and State of Maine, have invented certain new and useful Improvements in Bevels or Counter-Liners, of which the following is a specification. 1

My invention relates to certain improvements in bevels or counter liners for the use of ship carpenters and other Wood workers, and the object of the invention is to provide a device for marking from a given line upon one side of a plank or stick of timber a corresponding line upon' the opposite side, at any angle required, to produce a beveled or inclined edge when the plank is cut on a plane passing through the two lines.

The invention is illustrated in the accompanying drawings, in which- Figure 1, is an elevation of a bevel constructed according to my invention as applied to a plank shown in cross section. Fig. 2, is a top view of the same. Fig. 3 illustrates a modification.

Referring more particularly to the tigures the plank to be operated uponis shown at 3 bearing the line 3a which it is desired to transfer to the opposite side but nearer to or farther from the edge according to the angle which is desired. A standard or bar et serves to connect the upper and lower pointers or markers together. The upper marker is carried in a head 5 mortised to receive the bar 4, upon which it is vertically adjustable and is held in its adj usted position by a set screw 5. The upper pointer is shown at 6 and comprises a rod sliding in a recess 6a in the w upper head and pressed normally upward by a coiled spring 6b surrounding the rod and bearing against a collar or head 6. The lower end of the rod is sharpened or pointed as at 6C1 and this .point is designed to be i placed upon theline which it is desired to transfer, the marking being accomplished by the pointer or rod in the lower head as hereinafter described. The upper head 5 carries a bearing piece 7 which is pivotally connected to the head piece by means of a set screw 7a by means of which it maybe clamped at any desired angle.

The lower head 8 is` connected to the bar 4 slightly at one side as shown at 7b.

head likewise carries a pointed rod as 9 held v normally outward by a coiled spring 9a encircling the same and bearing against the head 9b whereby the point 9 is held normally below the lower face of the plank. The down- Ward movement of the rod is limited by a collar 9d preferably screw threaded upon the upper end of the rod.

In the operation of the device the rod 4 is placed at an angle to the bearing piece 7 corresponding to the bevel which it is desired to give ,to the edge of the plank. The bearing piece 7 is then placed upon the upper face of the plank with `its lower edge resting thereon and the point of, the rod which is caused to project slightly below the lower edge of the bearing piece, which is cut away The point of the rod is then placed upon the line 3*' and while in this position the lower rod is forced upward as by the blowof a hammer to cause the point to impinge against the lower face of the plank and mark thereon, this mark being nearer to or farther from the edge according to the angle of the bearing piece and bar as before stated. This operation is repeated at intervals along the whole length of the plank thus producing a series of points` or marks by means of which a line may be laid out on the lower side corresponding to the line upon the upper side.

In order that the point of the upper rod may always project slightly below the bearing face a block 7c is connected to the said bearing piece having a groove 7d in which rests a chain or cord 7 e, the free end of which is connected to the upper end or head of the rod, and by this means any downward movement of the bearing piece will draw down the rod against the pressure of the spring.

It is sometimes found necessary to support the device from below instead of from above owing to the position of the plank. To accornplish this I provide a second lower bearing piece 10 carried upon a head 10a similar to the upper head, and to which it is clamped by a set screw. This bearing piece 10 may bc grasped by the hand and pressed against the lower'` face of the plank (after having been set at the proper angle) and the operamwwwzlim- IOC tion vthen proceeded with as before described,

the only. differencebeing that the handv Having thus described my invention, what I claim isp 1. In combination, the connecting bar, the upper and lower heads'thereon, pointed rods movable in said heads, and a bearing piece adjustably pivoted to one of said heads, substantially as described.

2. In combination, the connecting bar, .the upper andv lower heads adjnstabiy mounted thereon, pointed rods movably supported by vsaid heads and an adj ustable bearing piece, substantiallyv as deseribed.

3. In combination, the connecting bar, the' upper and lower heads adj nstably mounted thereon, pointed rods movabiy supported in said heads, a bearing piece adjnstably pivoted to the upperl head, and connections between said bearing piece and upper rod whereby the point of the rod is maintained below the face of the bearing piece, substantiaily as described.

4. VIn combination, the connecting bar, the upper and lower heads adj ustabiy mounted thereon, pointed rods movable verticaily in said` heads, and bearing pieces adj ustably pivoted to said heads, substant-iaily as described.

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

wM. HENRY cooMBs. i

Witnessesz- FRANK B. MILLER,L AR'rEMAs HEAL.V

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