US689035A - Cutting-off and dowel-socket-boring or tenon-forming machine. - Google Patents

Description

No. 689,035. Patented Dec. l7, l90l. E. F. BRAINARU. CUTTING-OFF AND DOWEL SOCKET BORING UR TENUN FGRMING MACHINE.

[Application filed. Apr. 8, 1901.\

(No Model.

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.lllllll n-au Jun/641% fiw ETEWY 1'77 No. 689,035. Patented Dec. 17, I901.

E. F. BRAINARD. CUTTING-OFF AND DOWEL SOCKET BORING 0B TENON FORMING MACHINE.

(Application filed Apr. 8, 1901.)

(No Model.) 2 Sheets- Sheet 2.

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UNITED STATES PATENT D FFIGE.

EDWIN F. BRAINARD, OF GARDNER, MASSACHUSETTS, ASSIGNOR TO LEVI G. MCKNIGHT, DOING BUSINESS UNDER THE FIRM-NAME OF L. G. MCKNIGHT & (10., OF GARDNER, MASSACHUSETTS. I

CUTTING-OFF AND DOWEL-SOCKET-BORING OR TENON-FORMING MACHINE.

SPECIFICATION forming part of Letters Patent No. 689,035, dated December 17, 1901.

Application filed April 8, 1901. SEIl'aINO. 54,837. (No model.)

To ctZZ whom it may concern:

Be it known that I, EDWIN'F. BRAINARD, a citizen of the United States, residing at Gardner, in the county of Worcester and State of Massachusetts, have invented a new and useful Cutting-Off and Dowel-Socket-Boring or 'Tenon-Forming Machine, of which the following is a specification.

This invention relates to that class of woodro working machines which are employed for cutting out pieces for making up chair-frames or similar purposes and which are designed to square off the ends of the work and bore the dowel-sockets therein or form tenons I5 thereon; and the especial object of this invention is to improve this class of machines and enlarge the range of work for Which the same may be employed by adapting the machine for the production of oblique-ended 2o frame-pieces-such, for example, as the side pieces employed in box chair-seats or similar locations.

To this end this invention consists of the squaring-off and doWel-socket-boring mar5 chine or tenon-forming machine and of the combinations of parts therein, as hereinafter described, and more particularly pointed out in the claims at the end of this specification.

In the accompanying two sheets of drawings, Figure l is a side view of a machine constructed according to this invention. Fig. 2 isa detailview of the connections for operating the tool-carriages. Fig. 3 is a transverse sectional view of the machine, taken on the line 3 3 of Fig. 1; and Fig. 4. is a perspective view illustrating the manner in which the work is supported on the carriage and the relation of the drills or other tools thereto when the machine is adjusted to produce oblique- 0 ended work.

In many classes of work, especially in framing box-seated chairs,the Wooden strips which form the sides of the chair-seat have oblique ends or end faces which are not at right angle'swiththeirsides. Noneof the machines which have heretofore been employed for this class of work, so far as I am acquainted with the same, have been designed for simultaneously cutting off the ends of the oblique-ended pieces before referred to or have been capable of simultaneously boring dowel-sockets in such pieces or forming tenons thereon.

The especial object of myinventionis therefore to provide a simple, efficient, and inexpensive machine which is designed to simultaneously saw or square off the ends of Wooden pieces at oblique angles with their sides and to thereafter simultaneously bore dowelsockets in the opposite ends of said pieces or form tenons thereon. To accomplish this ob- 6o ject, a machine constructed according to this invention comprises a support for holding the work in an inclined position, so that the same may be presented to two circular saws, so that the ends thereof will be cut off at the desired 6 5 angle, and two sets of tools which maybe set to different relative horizontal planes and simultaneously operated to bore dowel-sockets in opposite ends of the work.

Referring to the accompanying" drawings and in detail, a machine embodying this invention, as herein illustrated, comprises a frame or bed-piece A, supported on suitable legs B. Dovetailed into the bed-pieceAandv longitudinally adjustable thereon at one end of the frame is a supporting-carriage 10, and longitudinally adjustable on the frame A, near its opposite end, is a supporting-car riage 11. I

In setting the machine to different lengths of stock the supporting-carriages 10 and 11 r are set to different relative longitudinal positions on the bed-piece A. Formed integrally with or secured to the supporting-carriage 11 is a guide frame or well 12, and vertically movable in the guide frame or Well12 is a square plunger or frame 13, carrying a supporting-plate 14 at its upper end. Movably mounted in the supporting-carriage 11 and plate 14 are the tool- carriages 15 and 16. The spindles and driving-gear for turning the same in the carriages 15 and 16 are similar in construction, and a reference to one-such set of parts willsuifice. As herein illustrated, this mechanism comprises a screw 18 for 5 transversely adjusting a bearing-piece 17, journaled in which are the spindles 19. As

herein illustrated, there are three spindles 19 in each set, and said spindles are'geared together by any of the usual connections, so

that they may be turned or driven by driving-belts 20.

Near its center the frame or bed-piece A is provided with a frame 21, vertically adjustable, in which is a support 22, and dovetailed onto the support 22 is a transversely-movable carriage 23. Adjustably secured at one end of the carriage 23, as most clearly illustrated in Fig. 4, is a jig or end piece 24 for holding the work W at different relative inclinations. The work IV may be clamped in place in its carriage 23 by any of the ordinary clamping devices, which need not be herein described or shown, and cooperating with the carriage 23 are two cross-cut circular saws S for cutting or trimming off the ends of the stock to make the same of proper length.

The operating connections for moving up the drills or other tools to bore dowel-sockets in the ends of the work or to form tenons thereon comprise a pulled-down strip 25, controlled from atreadle. Connected to the strip 25 is a link 26 for operating a bell-crank lever 27, journaled in the frame of the machine and connected to operate the carriage 16, and also connected to the strip 25 is a link 28, adjustably connected by a bolt 30 to a link 29, which is connected to operate a bell-crank lever 34, pivoted in the plunger or verticallymovable frame 13 and connected at its upper end to operate the tool-carriage 15.

In adjusting and operating a machine as thus constructed the carriage-jig 24 is first set to support the work at the desired inclination, and the vertically-movable plunger or frame 13 is raised by means of a hand-wheel 31 to bring its set of tools to a sufficientlyhigh elevation to properly engage the ends of the work. The vertically-movable plunger or frame 13 may be clamped in its adjusted position bya clamp-bolt 33, and threaded in the well or frame 12 I preferablyemploy stopbolts or bottom screws 32,which limit the distance to which the plunger or frame 13 can be lowered, so that when the same has been lowered far enough to rest on said screws 32 the two sets of tools will be brought to the same horizontal plane, so that the machine will be adapted for use on square-ended work.

In the drawings I have illustrated the spindles 19 as provided with ordinary drills or boring-bits for forming dowel-sockets in the opposite ends of the work.

If instead of formingdowel-sockets in the work it is desired to form tenons thereon, the ordinary cutting tools or chucks may be substituted for the drills, as in the ordinary practice with'machines of this kind.

When the machine is properly adjusted to produce the work desired, the ends of the wooden piece being operated upon will be sawed off by the circular saws S when the carriage is moved transversely, and the carriage then being drawn back the two sets of drills may be simultaneously advanced by the treadle connections before referred to to bore dowel-sockets in the opposite ends thereof.

In the machine as herein illustrated I have shown only one of the tool-carriages supported on a vertically-movable support. It is to be understood, however, that both of said carriages may be mounted on vertically-adjustable supports if it is desired to' give the machine a wider range of adjustment than herein illustrated.

I am aware that numerous changes may be made in myimproved machine by those who are skilled in the art without departing from the scope of my invention as expressed in the claims. I do not wish, therefore, to be limited to the construction which I have herein shown and described; but

What I do claim, and desire to secure by Letters Patent of the United States, is-- 1. In a machine for simultaneously boring dowel-sockets in frame-pieces for chairs or similar purposes, the combination of a support for holding the work in an inclined position, tools for engaging theopposite ends of the work, means for setting the tools at opposite ends of the work to different elevations, and connections for operating said tools, substantially as described.

2. In a machine of the class described, the combination of a transversely-movable carriage, means for supporting the work thereon in an inclined position, saws cooperating with said carriage for cutting the work to length, cutting-tools such as drills for boring dowelsockets in opposite ends of the work, means for setting said drills to different elevations, and connections for operating said drills, substantially as described.

3. In a machine of the class described, the combination of a bed-piece or frame, primary carriages longitudinally adjustable thereon, alongitudinally-movable tool-carriage mounted in one of the primary carriages, a vertically-movable frame or plunger mounted in the other primary carriage, an adjustingscrew for setting the same to different elevati0ns,-a second tool-carriage longitudinally movable upon the vertically-movable plunger or frame, means for supporting the work in an inclined position, and treadle connections for simultaneously operating said tool car riages, substantially as described.

4. In a machine of the class described, the combination of a frame or bed-piece, primary carriages adjustable thereon, a tool-carriage mounted in one of the primary carriages, a vertically-movable plunger or frame mounted in the other primary carriage, an adjusting screw for setting the same to difierent elevations, a clamping-bolt for holding the'same in its adjusted position, a second tool-carriage carried by the vertically-movable plunger or frame, a transversely-movable work-carriage having means for supporting the work in an inclined position, circular saws cooperating therewith for cutting the work to length, and treadle-controlled connections for simultaneously operating the tool-carriages, substantially as described.

IIC'

5. In a machine of the class described, the combination of a frame or bed-piece,a primary carriage longitudinally adjustable thereon, a tool-carriage mounted in one of the primary carriages, a vertically-movable plunger or frame mounted in the other primary carriage, an adjusting-screw for setting the same to different elevations, a second tool-carriage carried by the verticallymovable plunger or frame, an operating bell-crank for the firstnamed tool-carriage journaled in the frame of the machine, an operating bell-crank for the second-named tool-carriage journaled in the vertically-movable plunger or frame, and a treadle mechanism for operating said bellcranks, said treadle mechanism having an adjustable connection With the second-named bell-crank, substantially as described.

6. In a machine of the class described, the combination of a frame or bed-piece, primary carriages longitudinally adjustable thereon, a tool-carriage mounted in one of said primary carriages, a vertically-movable plunger or frame mounted in the other of said primary carriages, a second tool-carriage supported by the vertically-movable plunger or frame, a transversely-movable work-carriage, means for supporting the Work in an inclined position therein, circular saws cooperating with said work -carriage, and operating connections for the tool-carriages comprising a bellcrank lever pivoted in the frame and connected to operate the first-named tool-carriage, a bell-crank lever pivoted in the vertically-movable plunger or frame for operating the second-named tool-carriage, and a treadle mechanism having an adjustable connection with the last-named bell-crank, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

EDWIN F. BRAINARD. Witnesses:

THATCHER B. DUNN, FLORENCE L. MOORE.

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