US1153841A - Doweling device. - Google Patents

Description

E. EARLE.

DOWELING DEVICE.

APPLICATION FILED JULY 2.1912.

Patented Sept. 14, 1915.

FIG-

FIG. I

FIG- V.

INVENTOR:

EDWARD EARLE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-FOURTH TO JOHN D. LOCKE, 0F PHILADELPHIA, PENNSYLVANIA.

DOWELING DEVICE.

Specification of Letters-Patent.

'PatentedSept. 14, 1915.

Application fi1ed. July 2, 1912. Serial No. 707,313.

To all whomtt may concern Be it known that I, EDWARD EARLE, of Philadelphia, in the-Stateof Pennsylvania, have invented a certain new and useful Improvement in Doweling Devices, whereof the following is a specification, reference being hadto the accompanying drawing.

My invention relates to devices for guiding drills to form sockets for dowel pins in wood joinery andis particularly adapted for embodiment in a portable device.

As hereinafter described my invention includes a block having a straight edge and a plane face at right angles thereto, aseries of drill vsockets of different diameters ex tending parallel with said face and at respectively different distances therefrom, and, a plate having its ends parallel with said straight edge and connected with said block I by adjustable clamping means so that said plate serves to guide the work in proper relation with said drill sockets, and variably limit the depth to which drills extend through said sockets into the work, by contact of the end of said plate with the drill stock.

My inventionincludes the various novel features of construction and arrangement hereinafter more definitely specified.

In the drawings; Figure I is an end view of a device conveniently embodying my invention and showing its relation to the work. Fig. II is a front elevation of the device shown in Fig. I. Fig. III is an end view of a modified form of my invention. Fig. IV is a front elevation of the device shown in Fig. III. Fig. V is an edge view of a piece of work showing dowel sockets made therein by the use of my device.

Referring to Figs. I and Illa-The block 1 has the straight edge 2 and the plane face 3 at right angles thereto, and, the series of drill sockets 5, 6, 7, 8 and .9, of difierent diameters, extend through said block at right angles to said edge 2 and parallel with said plane face 3 at respectively different distances from the latter. The opposite face of said block 1 is arranged in steps respectively local to saidsockets and at difierent .distancesfrom said plane face, and, the lines 11 are scored or otherwise marked on said stepped surface respectively parallel with the axes of said sockets in a plane at right angles with said plane surface and intersecting the respective axis; so that said lines 11 indicate the location of the axesof saidsocketsin planesnormal to said plane surface and facilitate the location of said sockets with reference to marks scribed on .the work as hereinafter described. Said stepped construction of the block 1 permits the latter to be conveniently employed as a gage of thickness of the material in which the holes are to be drilled. The chip outlet channels 13v extend in said block. transversely to the axes of said sockets and open into the latter to permit the escape of chips therefrom during the drilling operation. The plane guide plate 15 is in contact with said plane face 3 ofthe block and projects beyond said straight edge 2 to variably limit the depth to which drills may extend through said sockets, by contact of the end of said plate with the drill stock. In order to conveniently effect the longitudinal adjustment of saidplate withrespect to said block; said plate isprovided with graduations representing units of length, in the direction of the length of said sockets, and has the two slots 16 engaging the ribs 17 on said block, and, said plate has the slot 18 for theclamp screw 19 which extends through thespring washer 20 in engagement with said block.

In the form of my invention shown in Figs. III and IV the block 21 has the opposite end flanges 22 respectively engaging the edges of the plate 23 in lieu of the ribs and slots above described. Said plates not only serve to limit the extent to which the drills may extend through the sockets in the blocks but also serve as guides for the work whereby'the latter may be held parallel with the straight edges of the block and at right angles to theaxes of -the drill sockets. For instance, as shown in Fig. I the work 25 is placed against the straight edge 2 of the block and extends parallel with its plane face 3, in contact with said plate, and, during the drilling operation the .work is held rigidlyin such positionin a vise or with any other suitable clamping means.

The location ofthe holes in the workmay be predetermined .by scribing the work as indicatedat 28; each mark on the work be ing successively brought into registry with the proper line 11, on the block, indicating the location of the axis of the socket in the nessof the material to be bored so that the mark scribed on the work-may be seen to register with the selected line on the block.

Although the devices above described are thus conveniently constructed and arranged to facilitate the drilling of holes centrally with respect to standard thicknesses of material such as architectural trimmings, moldings, picture frames, etcr; said devices may, of course, be employed in drilling holes at the predetermined distance of said sockets in-the block from the plane face thereof, regardless of the thickness of the material drilled. For'instance, in Fig. V the material 30 is provided with two series of holes 31 which are successively located therein by shifting said material with respect to the smallest socket in the block.

It may be observed that the method of locating the dowel sockets indicated in Fig.

V, to Wit, in two series in staggered'relation, is advantageous not only in that such staggered relation affords the maximum thickness of material surrounding the dowels, but that the dowels thus located oppose their longitudinal strength to strains tending to break them transversely, whereas dowels arranged in a single series only oppose their transverse strength to strains tending to break them transversely.

Although for ordinary joinery I prefer to provide blocks with drill sockets extend- 7 ing at right angles to the straight edgethereof; it is to be understood that such blocks may be provided with drill sockets extending therethrough at different angles, in accordance with my invention. Moreover, although I find it convenient to employ plates such as I have described, in combination with the blocks containing the drill sockets, in order to guide and hold the work with respect to said blocks, it is to be understood that such blocks may be employedwith other means for holding them,

in connection with the work, and therefore I donot desire to limit myself to the precise details of construction and arrangement hereinset forth as it is obvious that various modifications may be made therein without departing from the essential features of my invention as defined in the appended claims.

I claim g I e p 1. In a doweling device, the combination I with a block having a straight edge, a plane tances from said plane face, said stepped face having lines respectively parallel with the axes of said sockets in a plane at right angles with said plane face, and, chip outlet channels extending in said block trans versely to the axes of said sockets and opening into the latter; of a plane guide plate in contact with said plane face and projecting beyond said straight edge of said block at the ends of said sockets, said plate having three slots parallel with said sockets; said plate having graduations representing units of length in the direction of the-length of said sockets; two ribs on said block fitted to slide in two of said slots; a clamp screw on said block fitted throughthe other of said slots; and, a spring washer between said plate and the head of said screw; whereby said plate may be adjusted longitudinally on said block at right angles with respect to the straight edge thereof to limit the depth to which drills may extend through said sockets, by contact of the end of saidplate with the drill stock.

2. In a doweling device, the combination with a block having a straight edge, a plane face at right angles thereto, and a series of drill sockets of'difl'erent diameters parallel with said face and at respectively difierent distances therefrom, the opposite face of said block being arranged in steps respec-e block at the ends'of said sockets; said plate.

having three slots parallel with said sockets; graduations representing units of length on said plate in the direction of the length of said sockets; tworibs on said block fitted to slide in two of said slots; a clamp screw on said block fitted through the other of said slots; and, a washer between said plate and the head of said screw; whereby said plate may be adjusted longitudinally on said block at right angles with respect to the straight edge thereof to limit the depth to which drills may extend through said sockets, by contact of the endof said plate with the drill stock.

3. In a doweling device,the combination with a block having a straight edge and a plane face at right angles thereto, a series of drill sockets of different diameters parallel with said face and at respectively different distances therefrom, and, the opposite face of said block having lines respectively parallel with the axes of said sockets in a plane at right angles with said plane face; of a plane guide plate in contact with said plane face and projecting beyond said straight edgeof said block; said plate having graduations representing units of length in the direction of the length of said sockets; means slidably connecting said block and plate; and, clamping means; whereby said plate may be adjusted longitudinally on said block at right angles with respect to the straight edge thereof to limit the depth to which drills may extend through said sockets.

4. In a doweling device, the combination with a block having a straight edge, a plane face at right angles thereto, and a seriesof drill sockets of difi'erent diameters parallel with said face, and, the opposite face of said block having lines respectively parallel with the axes of said sockets in a plane at right angles with said plane face; of a plane guide plate in contact with said plane face and projecting beyond said straight edge of said block; said plate having graduations representing units of length in the direction of the length of said sockets; means slidably connecting said block and plate; and, clamping means; whereby said plate may be adjusted longitudinally on said block at right angles with respect to the straight edge thereof to limit the depth to which drills may extend through said sockets.

5. In a doweling device, the combination with a block having a straight edge, a plane face at right angles thereto, and a series of drill sockets of different diameters parallel with said face, and, the opposite face of said block having lines respectively parallel with the axes of said sockets in a plane at right angles with said plane face; of a plane guide platein contact with said plane face and projecting beyond said straight edge of said block; means slidably connecting said block and plate; and, clamping means; whereby said plate may be adjusted longitudinally on said block at right angles with respect to the straight edge thereof to limit the depth to which drills may extend through said sockets.

6. In a doweling device, the combination with a block having a straight edge, a plane face at right angles thereto, and a drill socket parallel with said face, and the opposite face having a line parallel with the axis of said socket in a plane at right angles with said plane face; of a plane guide plate in contact with said plane face and projecting beyond said straight edge of said block; and, clamping means; whereby said plate may be adjusted longitudinally on said block at right angles with respect to the straight edge thereof to gage the depth to which drills may extend through said socket.

7. In a doweling device, the combination with a block having a straight edge, a plane face at right angles thereto, and a drill socket parallel with said face; of a plane guide plate in contact with said plane face and projecting beyond'said straight edge of said block; and, clamping means; whereby said plate may be adjusted longitudinally on said block at right angles with respect to the straight edge thereof to gage the depth to which drills may extend through said socket.

8. In a doweling device, a block having a straight edge, a plane face at right angles thereto, and a series of drill sockets of different diameters parallel with said face and at respectively different distances therefrom; the opposite face of said block being arranged in steps respectively local to said sockets, at different distances from said plane face, said stepped surface having lines respectively parallel with the axes of said sockets in a plane at right angles with said plane face, and, chip outlet channels extending in said block transversely to the axes of said sockets and opening into the latter.

In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsylvania, this first day of July, 1912.

I EDWARD EARLE.

Witnesses:

ARTHUR E. PAIGE, JOHN Locnn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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