US1494897A

US1494897A - Rotary plug-routing bit

Info

Publication number: US1494897A
Application number: US627967A
Authority: US
Inventors: Freye Herman
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-03-27
Filing date: 1923-03-27
Publication date: 1924-05-20
Anticipated expiration: 1941-05-20

Description

. H. FREYE ROTARY PLUG ROUTING BIT Filed March 27. 1923 INVENTOR. f/a'mawfiz &,

BY Y y ATTORNEYS.

Patented May 20, 1924.

UNITED STATES HERMAN FREYE, OF WEST ORANGE, NEW JERSEY.

ROTARY PLUG-ROUTING BIT.

A ncauoa filed March a7, 1923. Serial No. 627,967.

7 '0 all whom it may concern:

Be'it known that I, HERMAN FREYE, a citizen of the United States, residing at West Orange, in the county of Essex and State of New Jersey, have invented certain new and Useful Improvements in Rotary Plug-Routing Bits; 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, reference being had to the accompanyingdrawings, and to characters of reference marked thereon, which form a part of this specification.

This invention relates, generally, to improvements in wood working tools; and the invention has reference, more particularly, to a novel boring bit or rotary gouge for routing out or shaping plugs from wood or other material.

7 Cabinet makers, carpenters and other artisans often find it necessary to fill in a hole in the face of a wood piece with a plug; and especially in cabinet work it is highly desirable that the plug used for such purpose shall match the piece in which it is inserted both in color and as to the characteristics and quality of the piece. It is therefore desirable to provide a tool which may be used by the artisan to rout out or shape, from the'back of the wood body or piece which is to be plugged, a plug suitable for use therewith, thus assuring sameness of color, kind, quality, grain and other characteristics, or in other words a perfect match between plugand the piece in which it is inserted, and thus permitting the presence of the plug to be practically unnoticeable in the finished article. It is the object of this invention to provide a novel tool which may be used for routing out or shaping a plug for detachment from the piece operated upon, and to this endthis invention provides a novel construction of boring bit or rotary gouge which will be de-.

scribed in the following specification and then defined in the claims appended thereto. The invention is clearly illustrated in the accompanying drawings, in which 2- Figure l-is a side elevation of the novel plug boring bit or rotary gouge made according to and embodyingthe principles of .this invention; Figure 2 is an end view of the same, drawn on an enlarged s cale; Figvertical longitudinal section t ure 3 is a fragmentary view roviding a %rough the working end of the bit or gouge as applied operatively to a wood body; Figure 4 shows in vertical section the generalcharacter of the plug formed by the tool and its relation to the piece from which it isform ed; and Figure 5 is a sectional-view of one manner of using the plug, as for example, in cabinet work to conceal a screw head. 4

Similar characters of reference are employed in all of the hereinabove described views to indicate correspondingparts.

Referring now to said drawings, the reference character 6 indicates the head of the novel boring bit or rotary gouge, the same comprising a cylindrically shaped body, at the lower end of which are provided the cutting elements of the tool. Extending longitudinally upward from the upper end of said head is a shank 7 which terminates in a squared butt 8 for engaging the tool in coupled relation to the chuck of a brace or other mechanismemployed for turning the same. f

The cutting elements which project longitudinally from the lower end of the head 6 comprisea plurality of routing teeth 9, the outer sides of which are coincident with the cylindrical surface of said head 6. 7 Each tooth is provided with a substantially straight longitudinal cutting face 10 at its forward edge, and an upwardly end rearwardly inclined rear face 11 converging at the base of the cutting face. 10 ofthe succeeding tooth, to'thus provide intermediate adjoining teeth and openrclearance space or notch 12. The cutting edge 13 ofeach tooth is disposed at the vinner boundary of the cutting face 10 and is given a degree of pitch to accord with the degree of taper with which the plug to be cut or'shaped is desired tobe provided with; in. other words said cutting edge 18 is inclined inwardly and upwardly from the free end to the base of the tooth. The bottom or free end of each tooth-is longitudinally inclined rearwardly and upwardly fronrthe cutting face 10 to therear face 11 as. at 14;, and also said bottom or free end of eachtooth. is provided with an inwardly and upwardly extending lateral chamfer 15, thus providing at the bottom of the cutting face 10 ofeach tooth, and coincident with the outer cylindrical surface'of the head 6, a sharp gouging or cutting point 16, which is adapted to facilitate the, penetration ofthe tooth into the material to be cut when the tool is operated. The inner side of each tooth is cut away back of the cutting edge13 toward the rear face 11 to produce a transversely chamfered inner side 17, thus providing a clearance space, as indicated at 18 in Figure 2, which communicates with the clearance space or notch 12 at the rear of the tooth, the provision of this clearance space also eliminates much friction and consequent resistance to the turning of the tool, since the sharp cutting edge 13 only is permitted to engage and form the plug as the tool penetrates the material operated upon. In. operating the tool by hand, the same is fitted into a suitable brace by means of which it may be rotated about its longitudinal axis. Assuming that it is the desire of theoperator to form a plug out of the back of a wooden piece 19 for use in plugging the face of said piece, to thereby attain a perfect match of the plug and body with which it is to be used, as heretofore mentioned. The operator, under such circumstances, applies the tool t the rear side of the piece 19. and turns the same in a reverse direction for a few turns to thereby, cause the points 16 of the cutting elements to score the surface to thus produce a guiding groove for starting the tool. This having been done, the operator turns the tool in the operative direction, whereupon the points of the Cutting element start gouging into the bod of the piece. As the teeth follow each ot er duringthe rotation of the tool, the points 16 tend to penetrate deeper and deeper into the body of the piece, and as such penetration is initiated and continued the inwardly and upwardly inclined cutting edges 13 are brought into play whereby the sides of the plug being formed are tapered to the desired degree. Inasmuch as the outer sides of the cutting elements coincide with the cylindrical surface of the head 6, it follows that as the said cutting elements penetrate into the body of the piece the tool is kept centered for rotation about its longitudinal axis. As the cutting edges 13 cutaway the material from the sides of the plug being formed, the chips work upwardly and out wardlp through the open clearance spaces or notches 12 intermediate the cutting elements. After the cutting elements have been caused to penetrate to the distance sufficient to produce the desired length of plug the tool may be withdrawn, whereupon it will be observed that the body of the piece 19 is provided with a penetrant annular groove or gouge g leaving a central tapered portion which constitutes the desired'plug 20 (see Figure 4:). The plug 20 may be severed at its base from the body 19 of thepie'ce operated on by driving a chisel into said body in the-manner indicated. by

-conceal the screw head, and is then finished off flush with the outer surface of the front a, thus providing a perfect match in color, grain and qualitv. Of course, it will be understood that other uses may me made of the plugs, as may be required. I

From the above description it will be evident that this invention provides a novel construction of tool admirably adapted for the purposes in view, and that the same is easy to operate and highly useful to cabinet makers, carpenters and other artisans.

I am aware that some changes may be made in the construction of the tool without departing from the scope of the invention asset forth in the foregoing specification and as defined in the appended claims. Hence, I do not limit my invention to the exact arrangements and combinations of the devices and parts as described in said specification, nor do I confine myself to the exact details of the construction of said parts as illustrated in the accompanying drawings.

I claim v 1. A plug routing bit comprising a cylindrical head having a suitable shank at its upper end, and a plurality of cutting elements projecting longitudinally downward from its lower end the outer sides of which are coincident with the cylindrical surface of said head, said cutting elements being spaced apart by intermediate clearance notches, and each cutting element having a gouging point at its free end and a longitudinal cutting face at its forward side provided with a cutting edge bounding the inner side of said cutting face.

2. A plug routing bit comprising a cylindrical head having a suitable shank at its upper end, an annular row of cutting elements projecting downwardly from the lower, end of said head and separated one from the other by intermediate clearance notches, the outer faces of said cutting elements being coincid'ent with the cylindrical surface of said head, each cutting elementhaving a vertical forward cutting face and an upwardly and rearwardfly inclined rear face, each cutting element having a longitudinally rearward and upwardly inclined bottom laterally and upwardly chamfered from the outer side to the inner side thereof thus providing a sharp gouging point at the forward free end of each cutting element, and each cutting element having an upwardly and inwardly inclined cutting edge bounding its forward cutting face.

3. A plug routing bit comprising a cylindrical head having a suitable shank at its upper end, an annular row of cutting elements projecting downwardly from the lower end of said head and separated one from the other by intermediate clearance notches, the outer faces of said cutting elements being coincident with the cylindrical surface of said head, each cutting element having a vertical forward cutting face and an upwardly and rearwardly inclined rear face, each cutting element having a longitudinally rearward and upwardly inclined bottom laterally and upward-[1y chamfered from the outer side to the inner side thereof thus providing a sharp gouging point at the forward free end of each cutting element, each cutting element having an upwardly inclined cutting edge bounding its forward cutting face, and the inner side of each cutting element being transversely chamfered from said cutting edge toward said rear face thereof.

4. A plug routing bit comprising a cylindrical head having a suitable shank at its upper end, an annular row of cutting elements projecting downwardly from the lower end of said head and separated one from the other by intermediate clearance notches, the outer faces of said cutting elements being coincident with the cylindrical surface of said head, each cutting element having a vertical forward cutting face and an upwardly and rearwardly inclined rear face, each cutting element having a longitudinally rearward and upwardly inclined bottom laterally and upwardly chamfered from the outer side to the inner side thereof thus providing a sharp gouging point at the forward free end of each cutting element, each cutting element having an upwardly and inwardly inclined cutting edge bounding its forward cutting face, and each cutting face being chamfered rearwardly and outwardly from said cutting edge.

5. A plug routing bit comprising a cylindrical head having a suitable shank at its upper end, an annular row of cutting elements projecting downwardly from the lower end of said head and separated one from the other by intermediate clearance notches, the outer faces of said cutting elements being coincident with the cylindrical surface of said head, each cutting element having a vertical forward cutting face and an upwardly and rearwardly inclined rear face, each cutting element having a longitudinally rearward and upwardly inclined bottom laterally and upwardly chamfered from the outer side to the inner side thereof thus providing a sharp gouging point at the forward free end of each cutting element, each cutting element having an upwardly and inward y inclined cutting edge bounding its forward cutting face, each cutting face being chamfered rearwardly and outwardly from said cutting edge, and the inner side of each cutting element being transversely chamfered from said cutting edge toward said rear face thereof.

In testimony that I claim the invention set forth above I have hereunto set my hand this 22nd day of March, 1923.

HERMAN FREYE.

Witnesses:

GEORGE D. RICHARDS, FLORA MILLER.