US673378A - Mortising-machine. - Google Patents

Description

"0.073378. Patented May 7, 1901. B. 8. BROWN.

MORTISING MACHINE.

(Application filed Dec. 8, who.) (Ilo'llodaL) 4 Sheets-Shoat I.

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Ne. 673,378. Patented May 7, l90l.

R. 8. BROWN. MORTISING MACHINE.

(Application filed Dec. 8, 1900.)

4 Sheets-Shaet 2 (No Model.)

Wz'tzzevsar a. Q/ a Patented May 7, I90l. R. 8. BROWN.

MORTISINGMACHINE.

(Application filed Dec. 8, 1900.)

4 Sheets-Sheet 3.

(N'o'ModeL) &

JNITED STATES PATENT OFFICE.

ROBERT S. BROWN, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE NEW BRITAIN MACHINE CQMPANY, OF'SAME PLACE.

MORTISING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 673,378, dated May '7, 1901.

Application filed December 8, 1 900; Serial No- SQIZ LB. (No model.)

.in various directions with relation to the grain of the wood and to form them with ease and rapidity in the three principal positions occurring in common use or in other positions or relations with respect to the material as may be desired, the machine being particularly designed to make, first, the ordinary mortises or slots parallel with the edges of the wood in use with door-stiles and the frames of various articles of furniture; second,mortises or slots directly across the grain of the wood, as in loom-boards, reed-boards of. organs, &c., and, third, diagonal mortises crossing the grain of the wood at an angle of fortyfive degrees or at any inclination desired, as in manufacturing the slats of stationary blinds or similar work. Any of these mortises may of course extend through 'the work or be formed partially therethrough-and be of what is known as the blind variety, and any of them may be produced with a tapering cutting-chain, so that they will be larger at the upper than at the lower end as the work lies on the table, although the invention is not limited in this respect, for cutters of other kinds may be employed without departure therefrom.

A further object of the invention is the provision, in mortising-machine, of a column serving as a slide for a work-supporting table, which may be adjusted to different positions with respect to the cutter employed by partially rotating the table around said column, and in connection with this column and parallel thereto a vertical shaft, which acts as a guide for compelling vertical movement of said, table under the influence of a treadle or equivalent device, to be hereinafter described.

A further object of the invention is the provision of improved means for raising the table, said means including a treadle pivoted in a fork projecting from a sleeve swiveled on a rod in line with the axis of the vertical column and sustained by a bracket in a chamber in the base of the machine, the band'- wheel of the lifting-rod being provided with a hub having a spherical or rounded end entering a socket in a bracket projecting from the table and said lifting-rod being threaded at its lower extremity and inserted in a nut having an angular extension or oifset, to which one end of the treadle is pivoted,whereby the treadle may be adjusted with relation to the table without lifting or lowering the latter.

A further object of the invention is the provison of a hood for the suction-fan case, a chip-breaker, and a hand-guard assembled in a head, which may be fastened to the column by screws at the top thereof.

A further object of the invention is the provision of a chip-breaker of peculiar construction and faced with wood, the side walls of the opening in the wooden facing acting as supports to the work and preventing slivering thereof by the upward run of the chain.

In the accompanying drawings, Figure l is a perspective view of my invention with the table in position for enabling the cutter to form mortises in the work at right angles to the length thereof. Fig. 1 is a detail of the slide and the chain bar and block, showing the manner in which the bar and block are secured to said slide. Fig. 2 is a perspective view of my improved machine with the worksupporting table arranged at an angle to the position illustrated in Fig. 1 and the cuttingchain in such relation with the table that it will form mortises in the work parallel with the longitudinal line thereof. Fig. 3 is a front elevation, partially in section, of the upper part of the machine, the column and guide rod or shaft being broken away. Fig. 4 is a section on line a a, Fig. 3. Fig. 5 is a side elevation of the upper portion of the machine, the column and work-table lifting-rod being broken away. Fig. 6 is a partial longitudinal section of the work-supporting table, taken on line 121), Fig. 5. Fig. 7 is a detail in section of a part of the head of the machine, said section being taken on line 0 c, Fig. 5. Fig. 8 is a sectionof the machine on line (1 d,'Fig. 2, looking in the direction of the arrow. Fig. 9 is a side elevation of the base of themachine, the column and liftingrod being in section and the base being broken away to show the treadle connection. Fig. 10 is a front elevation of the yoke of the head and of the chip-breaker and hand-guard rod,

the chain cutter being represented by dotted lines. Fig. 11 is a section on line e e, Fig. 10. Fig. 12 is a section of the upper part of the vertical column and of the guide-rod, one of the swiveling collars being represented in plan view and a screw having a conical point being shown for securing the collar to the.

column in any desired adjusted position. Fig. 13 is a cross-section of the column and guide-rod, showing the work-table-support ing bracket or knee. Fig. 14 is a plan view of the work-supporting table adjusted for the formation of ordinary mortises parallel with the edges of the work; and Fig. 15 is a crosssection of the work, showing such a mortise formed therein. Fig. 16 is a plan viewof the table arranged to hold the work in position for the formation of diagonal mortises; and

Fig. 17 is a perspective view of a block, showing such a mortise formed therein. Fig.-18 is a similar view of the table and connected parts adjusted to a position to carry the work under the cutter, so that mortises or slots may be made squarely across the grain of the material; and Fig. 18 is a cross-section of the work containing such a mortise.

Similar characters designate like parts throughout the several views.

Referring to the drawings, the numeral 5 designates a vertical column rising from a base-plate 6, the latter having a hollow vertical extension 6, to which the column may be bolted or otherwise secured, said extension being cut away or cast open at one side 'at 6 for a purpose hereinafter stated. To the upper end of this column 5 is secured by bolts 7' a head 7, having a laterally-extending bracket 8 for the reception of a shaft 9, carrying a pulley 10, to which power may be applied. At its inner end this shaft 9 carries a sprocket-wheel 12 in engagement with a cutter-chain 13, fitted for movement over a chain-bar 14, which may be secured to a block 14 by a bolt 14 and both said bar and said block are adj ustably and simultaneously connected to a slide 15, fitted on ways of an apron 7, depending from the head 7 by a bolt 16, having at its inner end a head working in a longitudinal groove or T-slot 15' of the slide and at its outer end a nut 16, which serves simultaneously to clamp the bar to the block and the block to the slide. If desired, the

bolt 14 may be dispensed with; but I prefer to employ said bolt as an additional means for firmly clamping the upper end of the chain-bar to the block 14.

For the purpose of adjusting the slide 15, and thereby the chain-bar 14, to take up the slack in the cutter-chain a hand-Wheel 1'? is provided, said Wheel being secured to a screw 17', working in the nut 18 of a yoke 18, the side bars 19 of said yoke being secured to the slide in any desired way.

Attached to the head 7 and surrounding the shaft 9 is a case 20 for the reception of a suction-fan or blower, (not shown,) by means of which the chips, dust, &c., are withdrawn, and projecting from this case is a bracket 20, in which the screw 17 is mounted for rotation, but is prevented by collars or otherwise from longitudinal movement therein.

Projecting from the case 20 is a hood 70, which may be hinged at thereto, said hood covering the sprocket-wheel 12 and being so arranged that its lower end is open for the passage of the chain and the chips removed from the wood thereby, and the hood opens into the case 20 in the manner-described in my Patent No. 621,026, dated March 14, 1899, r

to which reference may be had. In order to afford access to the sprocket and theupper part of the cutter-chain, the hood may be swung upward on its hinge, as will be obvious. v I

Projecting from the slide 15 are brackets 22 and 23, respectively, for the reception of a sliding rod 24, to which a chip-breaker is attached, as will be hereinafter described, and a guard rail or bar 25, said rod and bar being secured adjustably in a yoke 80, having a platform or table for the reception of weights 81, which may be varied in number and size as desired and which normally tend to force said rod downward by gravital action, and connected to the lower end of this '31 a facing 32, of Wood, preferably of some hard variety, which subserves a purpose hereinafter set forth, and this facing is preferably located on the under side of the plate, as shown.

Upon the upper end of the column 5, im mediately beneath the head 7, is sleeved a collar 33, having a laterally-extending tubular bracket 33, and passing preferably through a reinforced portion of this collar and bracket is a screw 34, havinga conical end 34, adapted to fit within any of a series of openings 35 in the colum n 5, for a pu rpose hereinafter stated.

Designated by the numeral 36 is a knee or work-table support having a sleeve 36, fitted for swinging movement upon the vertical column 5, and upon the knee 36 is mounted a work-table 37, having a guide 38, which fits over a corresponding guideway 39 of said knee, as illustrated in Fig. 6, said table being capable of adjustment back and forth on the knee by means of a screw 40, workingin a nut of the knee. (See Fig. 4.) To take up wear and lost motion of the parts, a shim 41 may be secured by a screw 42 to the un der side of the table, and after adjustment the table may be fastened to its guideway by a pinch-screw 43, working in a depending bracket 44 of the table and having an operating-handle 45, said screw bearing against the side of the shim 41, as illustrated in Fig. 6. This work-table is, as illustrated in Figs. 1, 2, 4, and 5, preferably formed as an integral casting having a vertical back 37, against which the material may be clamped, said casting being adjustable on the ways of the knee 36. 1

Attached to or formed integral with th sleeve 36 of knee 36 is a tubular extension 36 and loosely fitted in this extension and secured to the bracket 33 of the collar 33 is a guide rod or shaft 21, the lower end of which is received and also secured in a tubular bracket 80 of acollar 80 loosely sleeved upon the column 5 and capable of rotation around the same adjacent to the point where said column is connected to the vertical extension 6' of the base 6. By the means described this shaft or rod 21 is secured parallel with the column 5, and it therefore serves as a guide, which while rotating with the work-supporting table 37 and the collars 33, 36, and 44 as the table is adjusted around the column compels said table to reciprocate in a fixed path.

Projecting from the collar 80 are two arms or lugs 80 and also projecting from the knee 36 is a perforated lug 36 which is closed or cupped on its under side, as at 36, for a purpose hereinafter stated. Passing between the lugs 80 is a lifting-rod 46, the upper end of which is inserted in the perforated lug 36 above mentioned, and this lifting-rod is, as

illustrated in Figs. 1 and 2, threaded intermediate its length at 47 and carries on said threaded portion a pair of check-nuts 48, and is also threaded at its lower end, as at 49, and is inserted in a nut 50, having an angular extension 50, to which a treadle 51 is connected, as illustrated in Figs. 1, 2, and. 9.

Located in line with the axis of the column 5 and within the hollow base 6 is a shaft 52, upon which is sleeved a fork 53, between the arms of which the treadle 51 is pivoted at 54, (see Figs. 1 and 2,) the lower end of said shaft being secured in a bracket 90 of said base by a screw 91, whereby as the table is rotated around the column the treadle moves with it.

At its upper end the lifting-rod 46 is provided with a hand-wheel 55, having a hub with a convex or partially-spherical portion 55, which fits the socket on the under side of the projectionv 36 as illustrated in Figs. 4 and 5, the perforation 36 in said projection being flared upward to permit the necessary movement of the lifting-rod 46 when it is actuated by the treadle.

In virtue of the construction just described it will be seen that by rotating the hand-wheel 55 the position of the treadle with relation to the table may be changed without lifting or lowering the latter, so that when the operator subsequently applies his foot to said treadle a new height of table may be presented, and if it is desirable to regulate the limit of downward movement of said table this can readily be accomplished by simply shifting the check-nuts 48 while the operator has his footupon the treadle.

Located on the guide-rod 21 is an adjustable stop or collar 56, which is secured to said rod by a screw 56, and this stop when set to the desired position limits the upward movement of the work-supporting table, and thereby regulates with exactitude and nicety the depth to which a blind mortise shall be cut in the material upon the work-table.

As illustrated in Figs. 1, 2, 14, 16, and 18, the work-supporting table 37 is provided with a series of slots or openings 57, 58, and 59 for the reception of the cutter-chain as the same passes downward through the work in forming the mortises therein, and these openings are so located and disposed with relation to the cutter-chain that one of them will be brought directly beneath said chain when the table is swung around the column 5 and is adjusted to the desired position with relation to said chain.

Any desired means may be employed for clamping the work upon the table, and in the drawings Ihave illustrated an arm or bracket 60 adjustably secured to the front of the table by a bolt 61, said arm 60 having an internally-threaded eye at one end, in which is titted a screw 62, carrying a clamp 63, this screw being provided with a hand-wheel 64,by which the clamp may be manipulated back and forth as desired. As will be seen by the construction described, the clamp may be adjusted by swinging the arm 60 to a position where it will lie parallel with the table, as in Figs. 3 and 5, or to the desired inclined position with relation to the table, as illustrated in Figs. 1 and 2. In the front wall of the table a series of openings is provided, each having internally-threaded walls and serving as a not for the bolt 40, whereby said bolt and the clamp carried thereby may be shifted along the table and be set in the position desired.

The collar 36, from which the table knee or bracket 36 projects, is split or divided at 3 and may be adjusted to take up wear by means of a tangent-screw 4, which will pinch the same to the column 5.

Divided bushings2, preferably of lumen or equivalent metal, are provided for taking up wear on the guide-rod 21,-and screws 21 are illustrated in Figs. 14 and 16 for adjusting said bushings when desired.

'Io sustain the work and prevent slivering by the cutter-chain, wood facinus may be used in the pockets 57, 58, and 59 of the worktable, if desired, and these facings may be inserted, as at 100, (see Figs. 14 and 16,)- in the" slots or pockets of the table below the chain. These lower wood faci-ngs prevent sl-ivering of the material as the chain goes through the same, and the wood facing 32 of the chip-breaker 28, being located above the work and surrounding the entire mortise, acts as apresser-foot and prevents the wood from I being slivered by the upward run of the chain.

In the operation of the machine the chain cutter cuts through the wood facing 32 before it reaches the work, and the'sides of the cut in said wood facing act as supports to the work being operated upon to prevent slivering of the same by the chain, and it is only necessary torenew said facing when a smallersized cutting-chain i's em'ployed. By the construction described the fibers of the wood lying at the side as well as at the ends of the mortise, which would naturally be disturbed by the chain-cutter in any angular position of the same relative tothe grain of the wood, are-supported and sustained against slivering action by the chain, and in this way per fect mortises-may be formed'in the material no matter what may be its angular position or relationto the cutter-chain.

Particular attention is directed to the fact that all of the parts carried by the head 7 may be assembled as a bench job before said head isplaced ,uponthe column 5and secured thereto by bolts or screws 7 whichpass throughthe base 7 of the head, said column furnishingthe sole support for the head. The driving-shaft 9 may also'be supported with-in divided-bushings 102, as illustrated in Fig. '7, if desired, and other similar mechanical details of construction may be employed throughout the machine wherever they are needed without departure frommy invention.

In the operation of my improved machine when it is desired to form an ordinary mortise parallel with the edges of the Wood, as'in door-stiles and the frames of various articles of furniture, asabove stated, the d'etents or screws securing the collars 33 and 80 to the column are withdrawn and the sleeve 36 and collars 33 and 80 which carry the guide-rod 21, are swung around the column to'the position illustrated, for example, in Figs.- 2 and l4,whichwill bring the slot or pocket 59 immediately beneath the cutter-chain. The foot is thenplaced upon the treadle 51, which has moved with the table, thereby depressing the same and raising,through the instrumentality of the lifting-rod t6, the knee or bracket 36 and its attached sleeve 36 until the cutterchain has penetrated to the desired distance through the material upon the table 37, the extent of forward movement of the worksupporting table being limited by the adjustable stop or column 56 on the guide-rod 21 and said table being caused to travel upon the column in a true vertical path by said guiderod, it being of course understoo that collars 33 and 80 are firmly secured to the column by the detents 34: and 84;, which are inserted within the desired perforations in the .Walls of said column.

If it is desired to form mortises or slots-directly across the grain of the wood'-as'in loomboards, the reed-boa-rds-of organs, &c.the table is adj usted' in the same manner to the position represented in Figs. 1 and 18 and, be ing secured in such position, is raised by the treadl'e to form a mortise or slot therein, as

illustratedin Fig. 1-8 In forming these kinds 'of mortises the clamp 63 is withdrawn, there being no necessity for the same,-for the chain cutter will act in forming the mortise or slot to cause the material to be snugly forced (See Fig. 18.

In forming diagonal mortises or slotscrossing-the grain of the wood at forty-five degrees,

' or thereabout, with relation to theedges of the work the table 37 is swung to the position represented in Fig. 16 and the clamp-63 is adjusted firmly to secure the material against the back 37 of the table-37, and the parts are actuated in the same manner as above described.

By adj ustingthe stop or collar 56 uponthe guide-rod 21 the table will, as abovestated, ,Lbeso limited in its upward movement that the cutter may be made to penetrate'the material exactly ineachinstance to the desired extent, so that either blind mortises extending partially through the wood or mortises extendingfully throughthe same may readily be formed,- if desired.

Many changes may be'made in the details of myinvention without departure therefrom,

and the invention is not limited to the precise construction illustrated and described.

The form of the column upon which the table is reciprocated may be diiferent from that shown-,'and this-is true of the guide rod or shaft for compelling the movementof the ta- .ble ina vertical path.

While acutter-chain is shownas a preferred means for formingmortises'of desired kinds in'the material, itis distinctly to be understood that the invention is not limited The details of the suction fanor blower and of the chip-breaker andhand-guardrod may also be widely varied without departure from the invention,vwhich is not limited to the construction described nor to a facing of wood secured to said chip-breaker, for other suitable material may beemployed for this purpose, if desired.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-- 1. In a mortising-machine the combination, with a vertical column, of a head carrying a cutter; means carried by the head for actuating said cutter; means for detachably securing said head to the upper end of the IIO column; a work-table swiveled upon the column; means for securing said woi'ktal)le when adjusted around the column; and means for reciprocating the work-table.

2. In a mortising-machine, the'combination, with a cylindrical column, of a head bolted to the upper end of said column; a cutter-chain; means carried by the head for actuating said chain; a work-table swiveled upon the column; devices for reciprocating said work-table; and meansfor so mounting said devices that they will move with the worktable when the latter is adjusted around the column.

3. In a mortising-machine, the combination, with a cylindrical column, of a work-tableadjustable around said column; means for securing said work-table in position when adjusted; a cutter for mortising the work on the.

table; and means for actuating said cutter; means for reciprocating the work-table; and means for so supporting the worlctable-reciprocating means that they will conform to the able with the table; and means for reciprocating said table.

6. In a mortising-inachine, the combination, with acylindrical column, of a head having a base-plate bolted to the upper end of said column; a shaft carrying a sprocketwheel journaled in bearings of the head; a cutter-chain; means carried by the head for supporting and guiding said chain; a casing for the reception of a fan or blower mounted in the head and having a hood covering said sprocket-wheel and cutter-chain; a Work-table mounted for rotary adjustment upon the column; and means for reciprocating said work-table. I

7. In combination with a column, a head having a base-plate bolted to the upper end of said column; a bracket extending from said base-plate; a shaft carrying an element to which power may be applied, and journaled in said bracket; a fan-casing through which the shaft passes; a cutter mounted in the head and actuated by the shaft; a worktable swiveled to the column; a treadle; and means for so connecting said treadle with the work-table that it will move with the worktable when the latter is adjusted around the column.

8. In a mortising-machine, the combination, with ahead, of a vertical column to which said head is secured; a slide adjustable on an adjusting the same carried by the head; a

shaft journaled in the head and carrying a sprocket-wheel; a chainbar and block; a bolt for simultaneously securing the chainbar and block to said slide; a work-table mounted for rotary adjustment and longitudinal movement upon the column; and means for reciprocating said worktable.

10. The combination, with a work-support, of means for cutting the work held upon said support; a chip-breaker for holding the work upon the work-support; and a facing of greater dimensions than the opening to be formedin the work, said facing being secured to the chip-breaker, and in which facing an opening is formed before the cutteroperates upon the work. i I

11. The combination, with a work-supporting table, of a cutter-chain; means for actuating said chain; a chip-breaker; and a facing of greater dimensions than the opening to be formed in the work secured to said chipbreaker and bearing upon said work, the cutter-chain forming an opening in the facing before it reaches the work.

12. The combination, with a work-support,

of a cutter; and a chip-breaker having a facing of wood through which the cutter cuts its way as it passes into the material upon the work-support, said facing being of dimensions to cover and bear upon the material on the part and adjacent to the part thereof through which the cutter passes.

13. The combination, with a work-support, of a chip-breaker; means for yieldingly sustaining said chip-breaker upon the material; and a facing, of greater dimensions than the opening to be formed in the material, detachably secured to the under side of the chipbreaker, and through which facing the cutter cuts its Way as it passes into the work.

14. In a mortising-machine, a chip-breaker consisting of an L-shaped plate having a rib, and a facing of greater dimensions than the mortises to be formed detachably secured to the under side of said plate, in combination with a work-support; and a cutter, thelatter forming an opening in the facing before it operates upon the work.

-l5. In a mortising-maehine, the combination, with a chip-breaker consisting of a plate having a facing of greater dimensions than the mortise to beformed detachably secured to its underside, of a cutter-chain which cuts its way through said facing before it operates upon the work; a reciprocatory work-table; and means for actuating said table.

c; I I 673,378

16. In a mortising-machine, a yieldingly? supported chip-breaker having a facing of greater dimensionsthan the mortise to be formed, in combination with a mortising-cutter which cuts its way through said facing;

and a support uponvwhich the work is placed,

said \vorkobeing operated upon by the cutter after said cutter has formed an opening in the facing. I 3

17. lhe combination, with a cutter, of a work-table; and a yieldingly-supported plate formed in the work, said facing being located on the under side of said plate and in which facing the cutter forms an opening before it reaches the work; and screws for detachably securing the facing to the plate.

19. In a mortising-machine, the combination,-with a column,'of collars sleeved upon said column; a guide rod or shaft connecting said collars; and a work-table swiveled upon the column and having a portion through which the guide-rod passes.

20. In a mortising-m'achine, the combination, with a cylindrical column, of collars;

sleeved u pon said column; guiding means cooperating with the collars; a work-tableswiveled upon the col-umn and having a portion thereof in contact with the guiding means; mechanism for reciprocating the work-table; anda cutter for mortising the material upon said work-table.

21. In--a mortising-machine, the combination, with a'vertical column, of a work-table swiveled upon said column; means for reciprocating the work-table upon the column; a cutter; means for operating said cutter; and 5 means for securing the work-table against rotation after it has been adjusted upon the column to the desired position with relation to the cutter.

22. In a mortising-machine, the combina- 1 tion, with a cylindrical column, of a work-table swiveled to the column; collars surround- 3 ing. the column above and below the worki table; means for adjustably securing saidj collars in rotary relation with the column; a guide for the work-table between the collars;

and means for reciprocating said work-table.

23. In a mortising-machine, the combination, with a cylindrical column, of a head secured to the upper end of said column; a collar located upon the column beneath said head and capable of rotation thereon; means for adj ustably securing said collar to the column; a collar located near the foot of the column and capable of rotary movement thereon; a guide rod or shaft uniting said collars;

awork-table swiveled to the column and having abracket through which the guide-rod loosely passes; a cutter and means for actuating the same carried by the head; and means for reciprocating the work-table.

24. In a mortising-machine, the combination, with a vertically-arranged column, of a head secured to the top ofsaid column; a cutter and means for actuating the same carried by the head; a collar having an extension adj ustably secured to the column beneath the head; a second collar secured in like manner near the foot of the column; a guide-rod secured to the extensions of said collars; a Work-table fitted for sliding movement upon the column, a portion of said table being sleeved upon the guide-rod; and means for reciprocating said work-table.

25. In a mortising-mac'hine, the combination, with a column, of a work-table swiveled thereon; a cutter; means for reciprocating the Work-table upon the column; means for securing the work-table in the desired position of rotary adjustment'upon the column; and a device connected with the means for reciprocating the work-table in a manner to perm it said means to move with the work-table during the rotary movement of the same about said column.

'26. The combination, with a column, of a cutter; a work-ta ble supported for rotary and 5 sliding movements on said column; a treadle;

and means connecting the treadle with the work-table.

27. The combination, withacylindrical column, of a cutter; means for actuating said cutter; a work-table connected to the column for rotary adjustment thereon; a treadle connected to said work-table; and means for so supporting said treadle that it will move with the work-table when the same is adjusted around the column.

28. The combination, with a cylindrical column, of a work-table swiveled to the column; a lifting-rod connected to the worktable; a treadle to which the lifting-rod is attached; and means for so supporting said treadle that it will move with the work-table when the latter is adjusted around the column.-

29. The combination, with a cylindrical column, of a work-table having a sleeve fitted over the column and adjustable around the same; a lifting-rod connected to said sleeve; a treadle pivoted to the lifting-rod; and means for supporting the treadle so that it will move with the work-table when the latter is adj usted.

30. The combination, with a column, of a knee swiveled to the column and having a work-table; an adjustable lifting-rod fitted to said k-nee; a treadle pivotally connected to the lifting-rod; and means for so supporting said treadle that it will move with the knee when the latter is adjusted around the column.

31. The combination, with a column, of a work-table a knee upon which the work-table is mounted, said knee being swiveled to said column for rotary adjustment thereon; a bracket. projecting from the knee and having a semispherical socket on its under side; an adjustable lifting-rod; a hand-wheel secured to the lifting-rod and having a hub fitted to the socket in the bracket; and means for actuating the lifting-rod.

32. The combination,withacylindrical column, of a knee having a sleeve surrounding the column and adjustable thereon; a worktable carried by the knee; a bracket projecting from the knee and having a semispherical socket; a lifting-rod; a device secured to the lifting-rod and having a semispherical portion fitted in said socket; and a device for actuating said lifting-rod and so mount-ed that it will move with the knee when the latter is adjusted around the column.

33. The combination, with acylindrical column, of a knee swiveled to said column and having a perforated bracket projecting from its swiveled portion said bracket having a socket with rounded walls; a lifting-rod the end of which passes through the perforation in the bracket; a wheel secured to the liftingrod and having a hub the end of which conforms to and fits within the socket of the bracket; a device for actuating the liftingrod; and means for so supporting said device that it will move with the knee during the adjustment of the same around the column.

34. The combination, with acylindrical column, of a knee swiveled to said column; a work-table carried by the knee; a lifting-rod connected to said knee; a treadle pivotally connected to the lifting-rod; and a device mounted for turning movement and to which the treadle is pivoted.

35. The combination, with a column, of a Work-table swiveled upon said column; a rod for actuating said work-table, said rod having a threaded portion; a nut in which said threaded portion is inserted; a device for actuating the lifting-rod, said device being connected to the nut; and means for so supporting said device that it will conform to the movement of the work-table when adjusted around the column.

36. The combination, with a vertical column, of a work-table sleeved upon said column and capable of rotative and reciprocative movements thereon; a swiveled support; a treadle pivoted to said swiveled support; and means for connecting said treadle with the work-table.

37. The combination, with a vertical column, of a knee sleeved upon said column and capable of rotative and reciprocative movements thereon; a work-table carried by the knee; a lifting-rod for actuating the knee; a treadle connected to the lifting-rod; and a swiveled support to which the treadle is pivoted.

38. The combination, with a vertical col- 11 mn, of a knee sleeved upon said column, and capable of rotative and reciprocative movements thereon; a work table adjustably mounted on the knee; an adjustable lifting rod for actuating the knee; a support swiveled to the base in line with the axis of the column; and a treadle pivoted to said support and to the lifting-rod.

39. The combination, with a vertical column, of a knee swiveled to said column; a work-table carried by the knee; a lifting-rod for actuating said knee: a treadle pivoted to the lifting-rod; and a fork swiveled to the base of the column and between the arms of which the treadle is pivoted.

40. The combination, with a support, of a knee mounted for reciprocation and for rotary adjustment thereon; a work-table carried by the knee; a lifting-rod for actuating the knee, said rod having a threaded portion; a nut having an extension; a treadle pivoted to said extension; and means for so mounting the treadle that it will move with the worktable when the latterv is adjusted around the column.

41. The combination, with a vertical column, of a knee sleeved upon said column; a work-table carried by the knee; a lifting-rod for actuating the knee; a support located in line with the axis of the column; and atreadle swiveled to said support and connected with the lifting-rod.

42. The combination, with a vertical column, ot' a knee sleeved upon said column; a work-table carried by the knee; a lifting-rod for actuating the knee, said rod having a threaded lower end; a nut in which the threaded end of said rod is inserted, said nut having an angular extension; a treadle fitted to said extension, and a swiveled fork between the arms of which the treadle is mounted.

43. The combination, with a vertical column, of a knee sleeved upon said column and havinga tubular extension; a work-table carried by the knee; a lifting-rod for actuating the knee; said lifting-rod having a threaded lower end and an intermediate threaded portion; a nut having an angular extension, in which nut the lower end of the lifting-rod is inserted; a treadle pivoted to said angular extension; means for supporting said treadle; a guide-rod working through the tubular extension of the knee, and means for regulating the position of the treadle.

44:. The combination with a vertical column, of a knee swiveled to said column and having a tubular extension; a work-table carried by the knee; means for reciprocating said knee and work-table; and a stop on the guide-rod for limiting the throw of the Worktable.

45. In a mortising-ma'chine, the combination with a cylindrical column, of a head secured to the upper end of said column; a mortising-cutter and means for actuating said cutter carried by the head; a collar located on the column immediately beneath the head and capable of rotary adjustment thereon; a second collar located adjacent to the base of the column; a guide-rod connecting said col- IIO through which the cutter passes; and a fae- I lars and passing through a bearing of the tion, with a column, of a series of collars mounted for rotative adjustment on said column; means for securing said collars to the column when-adjusted around the same; a

knee swiveled to the column and having a tubular extension; a work-table; aguide-rod secured to the collars and passing through the extension of the knee; a stopcollar adjustably secured to the guide-rod; a mortising-cutter; and means for reciprocating the knee until its further movement is limited by the engagement of the work-table with the stop-collar.

47. In a mortising-machine, the combination, with a vertical column, of a head detachably secured to the top of said column; a cutter-chain; ashaft journaled in the head and carrying a sprocket-Wheel in engagement with the chain; a collar adjustably secured to the column below the head; a knee swiveled to the column; a Work-table carried by the knee; a collar adjustablysecured to the column below the Work-table; a guide-rodsecured to the collars and passing through the knee; a stop-collar adjustably secured to the guide-rod; a treadle; and devices connecting said treadle with the knee.

48. In a mortising-machine, the combination, with a cutter, of a work-table having a slot or opening; a facing for said opening, on which facing the material rests; a device ing of greater dimensions than the mortise to be formed carried by said device and bearing upon the top of the work, and through which facing the cutter cuts its Way before it commences action upon the Work.

49. In a mortising-machine, the combination, with a vertical column, of a head secured to the top of said column; a cutter and means for actuating the same carried by the head; and a work-table swiveled to the column and having a series of slots or'openings into whichthe cutter may pass.

50. In a mortising-machine, the combination, with a vertical column, of a head bolted to the top of said column; a cutter-chain and chain-bar, a slide to which the chain-bar is secured, and means for adjusting said slide all carried by the head; a collar having a tubular bracket and adjustably secured for rotat-ion around the head; a knee swiveled to the column and capable of reciprocation longitudinally thereof, said knee having a'tubular extension; a work-table carried .by the knee; a collar having a tubular bracket and adjustably secu red for rotati've movement adjacent to the foot of the column; a guiderod secured in the tubular brackets of the collars and passing freely through the tubular extension of the knee; a stop-collar on said guide-rod; and means for elevating the knee.

ROBERT S. BROWN.

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