US395526A - Tenoning-ivjachine - Google Patents

Description

(No Model.) 4 3 Sheets-Sheet l.

E. TOTMAN.

TBNONING MACHINE. y No. 395,526. Patented Jan. l, 1889.

M PETERS Puma-umgnphy. wmngmn, p. a

(No Model.) l u 1 3 Sheets-Sheef 2. E. TOTMAN.

TENONING MACHINE. No. 395.526.- l Patented Jan. 1, '1889.

M Hm l l Egellqonmv.

" Ww@ f Nv PETERS Pholjihogmphn, Waihinginn. D. C.

(No Model.) 3 Sheets-Sheet 3.

E. TOTMAN.

TENONING MACHINE. No. 395,526. Patented Jem. 1,1889.

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llnrrnn @rares Barnett Genion.

EDSELL TOTMAN, OF LA GRANGE, LLINOS.

TENONINGIVIACHINE.

SIECIFICATION forming part of Letters Patent No. 395,526, dated January l, 188g.

Application filed April 2l, 1888. Serial No. 271,426. (No model.)

Be it known that l, EDSELL TOTMAN, of La Grange, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Tenoning -Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which forni a part of this specication. Y

This invention relates to an improved dovetailing or tenonin machine adapted for cutting dovetailed or other tenons upon both ends of a piece ot" wood at the same time.

The invention consists ot' the matters hereinafter described, and pointed out in the appended claims.

In the accompanying drawings, Figure l is a plan view of a machine embodying my invention. Fig. 2 is a iront elevation of the same. Fig. 2% is a side elevation of the same. Fig. il. is a side view of one of the cutters removed from the machine. Fig. 5 is a view of that face of the cutter opposite to that shown in Fig. -i, showing also the saw attached to the cutter.

As illustrated in said drawings, the main part of t-he machine-frame consists of two parallel frame plates, A A, connected with each other at their lower parts by girts a a. At the upper margins ot said plates, near the ends of the latter, are attached two cross -girts, A A', and between said girts are located two flat horizontally-arranged bars, A2 A?.

B B are two L.- shaped trame-arms or goose necks, which are attached to the horizontal frame-bars A? A2 at one side of the frame, and overhang the main part oi.' the traine, in the manner clearly shown in Fig. t. i v

C is a cutter-mandrel mounted horizontally in bearings C (.f upon the twerhanging ends of the frame -arn'is B B, and lf) is a cutter mandrel mounted in bearings D D', secured to the fraine-bars A2 A?. The mandrel C is provided with a belt pulley, C?, and with toothed cutting-disks E E, preferably located outside ol the bearings C tl. The lower mandrel, l), is provided with a ll elt-pu'lley, D2, and is provided near its ends with cuttingdisks F F, against the outer faces of which are secured saws G G. The cutting-dis is E E and F F are arranged to operate upon oppo-l site ends of pieces or strips of wood, so as to forindovetailed or other tenons thereon, the

cutting-tceth of the disks being shaped according to the kind of work to be done. The said cutting-disks are separated vertically a distance sufficient to form a tenen of desired thickness when the work is carried horizon- 6o tally between them, and in order to enable the thickness 'of the tenon made by the cutters to be varied as desired, the lmandrels C and D are made adjustable as to their distance apart vertically. For this purpose, in the machine shown, the bearings 'C C of the upper mandrel, C, are made vertically adj ust-able upon the trame-arms B B by means as follows: Each of said arms B B is provided at its free or overhanging end with a iiat ver- 7o tical surface, b, against which is secured an Lshaped plate, B', having vertically-adjustable attachment to the arm by means of a bolt, b', which passes through the plate and through a vertical slot in the vertical part of the arm.` The bearings C are bolted to the horizontal part b of the plate B.

For convenience in adjusting the plate B vertically, said plate is provided near its upper end witha lug, b2, through which passes 8o a vertical adjusting screw, B2, which is mounted to rotate in a horizontal lug, h3, at the upper end of the surface b.

The cutting-disks E E are not mounted directly above or over the cutting-disks F F, but somewhat to one side of the latter, this construction being employed to prevent conh tact oi' the saws G G (which are secured against the outer faces ot' the euttinga'lisks F F) Vwith the said cutting-disks E E. 9o

Vll is a horizontally-reciprocating work-holding carriagev which is supported in such position and is so moved as to carry the strips or pieces to be operated upon past or between. the cutting-disks, the carriage being adapted to receive and move a long piece or strip trom which shorter pieces are to be cut, so that pieces of a desired length maybe severed by the saws G G at the same time that the tenons or dovetails are being AFormed upon roo the ends of the pieces.

The carriage H consists, as herein shown,

of two side bars, Il l-I, cross-bars h h connecting them and iiat strips 7L 7L', which to rm the work-supporting surface of the carriage. The carriage is sustained upon the machin efralne by means of two gnide bars, I I, which are attached tothe girts A A ot' the frame, and are provided in their upper surfaces with guide-grooves eng'aged by projecting' tongues or ridges upon the side bars, ll ll, of the carriage.

Means for adj ustin the vertical position of the carriage are provided as follows: rlhe guide-bars l I, attached to the girts A A by means ot vertical slotted lugs 1' upon the guide-bars, and bolts 11' fi passing' through said lugs and tl'irough the girts A A. To afford means for accurately adj usting the position ot' the guide-bars and carriage, setscrews I l are inserted through the tlanges 1 ol' the frame-plates in position to bear u p-4 wardly against the said guide-bars, as clearly shown in the drawings.

The lower mandrel in the machine illustrated is not made vertically adjustable, the distance between the cutting disks being' changed solely by shitting the position of the upper mandrel. The work-carriage is made vertically movable, described, in order to enable the same to be adjusted to correspond with the thickness of the stutt' bein g operated upon, and also to bring' the work `into the proper vertical position with relation to the cutting-disks at'ter the latter have been separated or brought together by the adjustment ot' the upper mandrel in the manner above stated.

The carriage H is given a horizontal reciprocatory motion during the operation ot' the l machine by means ot' a crank-disk, J, and pitman J. Upon the said carriage, at t-he rear of the cutting-disks, is located an abutment strip or ledge, K, against which the work is placed and by which the same is carried ferward toward the said cutting-disks in the operation ot" the machine. The said abutment strip or ledge is herein shown as secured to the supporting-strips 7L 7i ot' the carriage, which latter are arranged at right angles to the cutter-mandrels and near the cuttingdisks, so as to sustain the work at points close to said disks.

K is an end stop located upon the carriage outside of and adjacent to the saw G at one end of the machine for accurately determining the position of the end of the blank-strip with relation to the cutting-disks, as said blank-strip is fed endwise to the machine vby the attendant. Said stop K is herein shown as secured to one'oi the strips 71?, hereinbefore referred to.

L L are two spring-arms attached to the frame-arms B B and extenc'ling forward over the work-carriage in position to press downwardly against the work as the latter 'passes the cutting-disks, thereby holding the work tlat upon the carriage at such time and pressing or dragging it backwardly against the ledge K, so that it will always be brought to the cutting-disks in a position at right angles tothe said disks. Said arms are herein shown as ad j ustably secured to the frame-arms B l by means of flat plates pivoted t-o the vert cal side :Faces ot' said trame-arms and provided with concentric slots through which pass clamp-nuts t'or holding the springs at a desired angle.

To prevent the wooden strips carried torward tothe cutting-disks from being drawn backwardly in the return movement of the carriage, l pivot pawls M M to tl'ie-frame-arms 'Il l with their free ends in a position to engage the rear edges oi' said strips at the torward limit of the movement of the carriage, as clearly shown in Fig. Il.

- As an improved construction in cuttingdisks adapted tor formingdovetailed tenons, l make the cutting-edges ot the teeth ot said disks inclined in such manner that, the end ot' the cutting-edge which is ad jacent to the outer or thicker end of the tenon is in. advance (having reference to the direction ot motion ot' the teeth in cut-ting) of the opposite end of the cutting-edge which acts upon the inner and thinner part ot' the tenon, as clearly shown in Figs. 4 and '3y this construction each cutting-edge operates with a draw cut, and cuts from the outer or thicker part of the tenon inwardly, thereby greatly lessening the lialjiility of breaking or splitting the wood at the outer angles ot the tenon.

rlhe cutting-edges, beveled or inclined in the manner described, are shown in the drawings, Figs. 4 and 5, as formed by means of oblique or beveled surfaces f f at the forward or advance faces of the teeth, and other beveled surfaces, ff, at the rearsurfaces ot' the teeth.

In the operation of the machine, made as above set forth, the long strip from which relatively short pieces, tenoned at both ends, are to be cut is fed endwise over the table from one side of the machine, the operator thrusting the strip along the top of the table, when the latter is at the rearward part of its movement, until the end of the strip strikes the stationary stop K. vances, carrying the entire strip endwise with it, until the strip has been carried a sui'licient distance to insure the severing of the strip by the saw. In such advance movement o the strip the tenon will not usually be finished; but the strip will remain in the position shown in Fig. 3 until the end of the strip is again placed in front of the ledge in the succeeding rearward movement of the carriage and the latter has advanced with the new strip, when the strip already severed will be thrust forward past the, cutting-disks by the action of the strip behind it. The saws G G at both ends of the mandrel obviously serve to cut the end-s of the tenons accurately with relation to the shoulders and side faces thereof, so that all the tenoned pieces produced will be of exactly the same shape and dimensions.

The carriage then ad,

TOO

IOS

The construction above set forth, wherein the upper cutting-disks are supported upon overhanging frame-arms or goose-necks, and in which a reciprocating carriage is employed to carry the work from a point at the inner or rear ends of the goose-necks outwardly or forwardly to the cutting-disks, has the important advantage of enabling the long strip to be fed to the machine and to be carried with the carriage in its movement toward the cutting-disk, so that short pieces are severed from the blankstrip at the same time the tenons are made and short pieces are discharged freely at the it'ront ot' the machine. Only a single handling of the lumber is thus required to cut the pieces to a desired length and to form the tenons thereon. the upper cutting-disks might be mounted in a frame having overhead support, or otherwise arranged to avoid interference with the lateral movement et the long strip or blank as thc latternim'es with the carriage. l-y the construction set it'orth, embracing overhanging frame-arms, however, l am enabled to make the machine with a single trame ot' compact and rigid form, to provide rigid. supports tor the cutting-disks, enabling' the latter to be accurately adjusted and held in position, and at the same time to so arrange the parts that long strips maybe coi'iveniently -ted to the machine and the finished pieces easily discharged theret'rom.

l claim as my inventionl. A tenening-machine comprising a inachine-lrame, two parallel inandrels mounted therein, a revolving cutting-disk mounted upon each end ot' each ot said mandrels, saws attached to both ends ot one of said mandrels outside the mi,tt.iiig=disks, drive-pulleys upon the mandrels, and a reciprocating carriage provided with a ledge to sustain and carry t'orward t-he work between said cutting-disks, whereby dovetailed tenons are formed, upon both ends ot' a piece or strip and the same is It will of course be understood that riage located and moving beneath the said overhanging arms, said carriage being provided with a ledge arranged to support and carry forward the work between the opposite pairs ot cuttingdisks, substantially described. A

A tenoningmachine comprising a machine-frame, two pairs of revolving cuttingdisks, a reciprocating carriage and pawls pivoted upon the machine-iframe and located in position to engage at their t'ree ends with the work at the forward limit ot the movement olf the carriage to lnevent the work being drawn backwardly with the carria substantially as described.

l. A machine t'or making dovetailial tenons, comprisin a reciprocating carri age provided with a ledge to sustain and carry Aforward the work and two pairs ot revolving cutting-disks 'for cutting the dovetails, each of said cuttingdisks havin aseries ot' oblique cutting-edges arranged with those parts oit the edges which act upon the outer or thicker parts of the tenons in advance, referring to the direction of motion ot' the cutters, otl those parts of said edges which act upon the 'inner or thinner parts ot the said tenons, substantially as described.

In testimony that l claim the foregoing as in y invention l attix my signature in presence of two witnesses.

EDSELL T'llMAN. lVitnesses:

C. CLARENCE PooLn, O. N. WILLIs.

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