US691267A

US691267A - Machine for jointing and sizing lumber.

Info

Publication number: US691267A
Application number: US4623401A
Authority: US
Inventors: Richard S Hill
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-02-06
Filing date: 1901-02-06
Publication date: 1902-01-14
Anticipated expiration: 1919-01-14

Description

No. 691-,267. Patented lan. l4, I902.

n. s. HILL.

MACHINE FOR JOINTING AND SIZING LUMBER.

' (Application fi1ed Feb.'6, 1901.) (No Model.) 6 shuts-sheet l.

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' THE "cams PETERS co. worm.

No. 69l,267. Patehted Jan. I4, 1902.

n. s. HILL.

MACHINE. FUR JOINTING AND SIZING LUMBER.

(Application fl led Feb. 6, 1901.)

6 Sheets$heat 2.

(Nb Model.)

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Patented Ian. [4, I902.

5. s. HILL. MACHINE FURJOINTING .AND SIZING LUMBER.

(Application filed Feb. 0519,01.)

-r mums PEYERS 00., PNOTO-LITHO ,WASHINGTCIN u c No. 69l,267. Patented Jan. l4,.|902.

' R. S. HILL;

MACHINE FOR JOINTING AND SIZING LUMBER.

(Application filed Feb. 6, 1901.)

' 6 Sheets-Sheet 4.

(No Model.)

n in) w- ENTER I I m xAQ I WITfiEEIEIEE Wig-Uni No. 69!,267. Patented Ian. I4, 1902.

n. s. HILL.

MACHINE FUR JOINTING AND SIZING LUMBER.

(Application filed Feb. 6, 1901.)

6 sheets-sheet s.

(No Model.)

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No. 69I,267. Patented Ian. l4, I902. n. s. HILL. I

MACHINE FOR JOINTING AND SIZING LLIIIIBER. (Application med Rub. a, 1901. (No Model.) 6 Sheet s-Sheet 6 ig J I I 1 (CNMNQL I 7 7/1 r r 7 f u a l/ r I I U 1 I I a a I I I I r u I I r .7 z 1 T 1 I I I II III I I I Ill/I l 7474717 working-machine, the same being divided on.

UNETIE "STATES PATE T Genres.

RICHARD S. HILL, OF'C'AMBRIDGE, MASSACHUSETTS.

MACHINE FOR JOINTING AND SIZING LUMBER.

SPECIFICATION" foming part of Letters Patent No, 691,267, dated January 14, 190% Application filed February? 6, 1901. Serial No. 46,234. (No model.)

To all whom it may concern:

Be it known that LRIOHARD S. HILL, a citizen of the United States, residing at Cambridge,in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Machines for Jointing and Sizing Lumber, of which the following is a specification.

The object of this invention is to produce a Woodworking-machine for jointing two opposite edges of several boards at the same time and reducing said boards to a given width.

The invention consists in a reciprocatory carriage, in combination with a pair of vertical rotary cutters, one located at each side of said carriage, a reversing mechanism for imparting a reciprocating movement to said carriage, and mechanism connected to and operated by said reversing mechanism to move said vertical rotary cutters horizontally toward and away from said carriage a predetermined distance.

The invention further consists in certain improvements in the stock-clamping mechanism.

The invention still further consists in the combination and arrangement of parts set forth in the following specification and particularly pointed out in theclaims thereof.

Referring to the drawings, Figures 1 and 2 are front elevations of the left and right hand portions, respectively, of my improved wood the line A A, a front elevation of that portion to the left of said line being illustrated in Fig. 1 and of that to the right of said line in Fig. 2. The complete front elevation may be obtained by placing the two lines A A together, the object of thus illustrating the invention being to enable the respective parts to be shown clearly. Figs. 3 and 4 are plan views of the left and right hand portions, respectively, of my improved woodworking-machine, the same being also divided on the line A A, the carriage-standards being shown in section and the cutters shown in their central position. Fig. 5 is a sectional elevation taken on line A a ct ai, Fig. 2, looking toward the left in said figure. Fig. 6 is a detail longitudinal section of a portion of the machine, taken on line 6 6 6, Fig. 5, looking toward the right in said figure or in the same direct-ion as in the elevations, Figs. 1 and 2. The brake mechanism is left out in both Figs. 5

and 6 in order to more clearly illustrate the mechanism shown in said figures. Fig. 7 is sectional elevation taken on line 7 7, Fig. 6, lookingtoward the left in said figure. Fig. 8 is a detail sectional elevation of the brake mechanism. Fig. 9 is a sectional elevation on line 10 10, Fig. 9, looking toward the left in said figure. Fig. 11 is a detail section taken on line 11 11, Fig. -5. Fig. 12 is a detail section taken on line 12 12, Fig. 2, looking toward the right in said figure. Fig. 13 is a plan section taken on line 13 13,Fig. 5. Fig. 14 is a detail section taken on line 14 14, Fig. 6. Fig. 15 is a detail'section taken on line 15 15, Fig. 7.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, is the-frame of the ma- .chine, 21' the vertical main driving-shaft, and

22 the main driving-pulley,connected by suit able belting to a pulley on a counter-shaft, from which the power to operate the machine is obtained. A pulley 23, fast to the shaft 21, is connected bya belt having a quarter-turn therein to the pulley 24, fast to a horizontal shaft 25 and by meansof which through connecting mechanism, hereinafter described, a reciprocating motion is imparted to the carriage 26. The carriage 26 slides on ways 27 on the frame 20 and has a rack 28, out upon the under side thereof, meshing a gear 29,

fast'to a shaft 30, which rotates in capped I bearings 31 on the frame 20. The gear 29 meshes a pinion 32, fast to a shaft 33, which rotates in capped bearings 34 on the frame a 20. A gear 35, fast to the shaft 83, meshes an intermediate pinion 36, which rot/ates upon mediate pinion meshes a pinio' 8, fast to a friction-pul ey shaft 39, wh' rotates in capped bearings 40 on rocker-arms 41 42 and has a friction-pulley fast thereto. Said rocker-arms are pivoted upon studs 43, fast to the frame 20, and the rocker-arm 42 is connected by a link 44 to a rocker-arm 45, fast a stud 37, fast to the frame 27am inter- ICO to the treadle rock-shaft 46. The treadle rock-shaft 46 rocks in bearings 47 on the frame and has a treadle 48' fast thereto on the outside of the frame. The treadle 48 has acounterweight 49 adj ustably fastened thereto. The gear also meshes a gear 51, fast to another friction-pulley shaft 52, which rotates in capped bearings 53 on rocker-arms 54 55 and has africtlon-pulley 56 fast thereto. Said rocker-arms are fast to rock-shafts 57 58, which rock in bearings 59 upon the frame 20. The rocker-arm 54 is connected through a slot 62 by a stud 60 to a hand-lever 61, fast to the rock-shaft 57 upon the outside of the frame 20. The rocker-arm 55 is connected by a link 63 to the rocker-arm 42. The shaft 25 rotates in capped bearings 64 on the frame 20 and has a friction-pulley 65 fast thereto.

The operation of the mechanism hereinbefore described for imparting a reciprocating motion to the carriage is as follows: Assuming the parts to be in the positions shown in the drawings, the operator places his foot on the treadle and hand upon the hand-lever 61, Fig; 2, and depresses them to the lower position, (shown in dotted lines,) thus tipping the rocker-arm to the'right, Fig. 6, and also the rocker-arms 41 and 42 through the connecting-link 44, thus carrying the frictionshaft 39 and friction-pulley to the right until said pulley contacts with the frictionpulley 65. Said friction-pulley rotates in the direction indicated by the arrow, and as soon as the friction-pulley 50 contacts therewith it is rotated also in the direction of the arrow thereon, thus rotating the pinion 38, in-

termediate pinion 36, gear 35, pinion 32,- and gear 29 all in the direction of the respective arrows in said figure and imparting to the carriage 26 aslidiug motion to the left through the rack 28. Upon releasing the treadle 48 and hand-lever 61 suddenly the counterweight 49 will carry the treadle 48 to the upper position, (dotted lines, Fig. 2,) tip the rockerarm 45 to the left, Fig. 6, and the rocker arms 41 42an d 5,4 in the same direction,and carry the friction-pulley shafts 39 52 and friction-pulleys50 and 56, respectively, to the left, removing the friction-pulley 50 from contact with the friction-pulley and bringing the pulley 56 into contact therewith. Said pulley56, gear 35, pinion 32, and gear 29 will now be rotated in the opposite direction to that indicated by the arrows in Fig. 6, and the carriage 26 will be carried to the right. \Vhen the carriage 26 is moving to the left or forward, Fig. 6, the stock is being trimmed by the cutters and the speed thereof is relatively much slo her than when said carriage is moving in thie opposite direction or reversing. This differ e in speed is attained by transmitting fow car 35 without reduction the speed of ihe pulley 65 when the carriage is reversir g and by reducing the speed transmitted to said gear when the carriage is running forward through the large friction-pub ley 50 and small driving-pinion 38, both fast to the same shaft.

In order to stop the machine quickly and positively, I supply a friction-brake 66, Fig. 8, consisting of a shoe 67, fast to a vertical reciprocatory slide 68, arranged to slide in ways 69 upon a bracket 70, fast to a cross-bar 71. Said cross-bar 71 is fast to the frame 20 and extends across from one side plate to the other thereof. Upon the upper end of the slide 68 is a slot 72, curved convexly upward and engaging a friction-roll 73, arranged to rotateupon a stud 74, fast to the lower end of the rocker-arm 75. The rocker-arm 75 is pivoted to an ear 76, fast to the stationary cross-bar 77, and is connected by a link 78 to an car 79 upon the link 63. The lower wall of the slot 73 is formeddirectly upon the slide 68. The upper wall is formed upon a cap 80, said cap being adjustable vertically toward and away from the slide68 by means of the cap-screws 81 and the adjusting set-screws 82.

The operation of the brake is as follows: If the operator wishes to start the carriage forward, he depresses the hand-lever 61 and treadle 48, as hereinbefore described, and keeps the treadle depressed until he wishes to reverse, whereupon he releases said treadle suddenly, and the counterweight 49 causes said treadle and hand-lever to move to the extreme upward position, as hereinbefore described. When the carriage is moving forward, the roll 73 is carried to the right-hand end of tlie'slot 72 by the rocker-arm 75, link 78, link 63, link 44, and rocker-arm 45. When the carriage is reversing, said roll is at thelefthand end of said slot.. If the operator wishes 'to stop the machine and apply the brake 66,

he releases the treadle gradually by the assistance of the hand-lever 61 until the roll 73 is midway between the ends of the slots 72 and stops it there, the hand-lever 61 and treadle 48 being at that time each in its central position or in the position shown in the full lines in the drawings. when said roll 73 is in said middle position the brake-slide 68 will be depressed on account of the convexly-curved slot 72 and the brake-shoe applied to the periphery of the friction-pulley 56 and also that the friction pulleys 56 and 50 will both be out of contact with the friction-pinion 65. i

The stock is clamped to the carriage, as shown-in Fig. 5, by a clamping-bar 83. Said clam ping-bar has a bearing-plate 84 attached to the under side thereof by two series of fiat springs 85. The springs 85 are fastened at the center thereof to the clamping-bar 83 by screws 86, and the bearing-plate 84 is suspended from the ends of said springs by bolts 87, the heads 88 of which are located in slots 89, running lengthwise of said bearing-plate 84-. This construction of a bearing-plate attached to a clamping-bar by means of a series of fiat springs interposed between said clamping-bar and bearing-plate renders it possible ICC IIO

It will be seen that' to clamp short pieces of stock firmly, whereas if the bearing-plate 84 were removed it is evident that short pieces of stock interposed between the fiat springs and the top of the carriage 26 would cause said flat springs to tip upon the screws 86 and would not hold the stock firmly against the carriage, whereas with the bearing-plate 84 attached no matter how short the piece of stock may be the pressure is equally distributed by means of the bearing-plate over the entire surface of said stock. The clamping-bar 83 is suspended at each end thereof upon four spiral springs 90, each of which is attached at its upper end to a screw-threaded bolt 91. Each of said bolts 91 passes through a hole 92 in a cap 93, fast to a standard 94, and has an adjusting-nut thereon which rests against said cap. Thetwo standards 94 are fast, one at each end thereof, to the carriage 26, and each has a vertical slot 96 therein to guide the clampingbar 83 against lateral movement. The lower end of each of the springs 90-is attached to a hanger 97 and has a recess 98 therein to receive a cylindrical head 99on the vertical shaft 100. Said shaft is screw-threaded at 101 to engage the screw-threaded hole 102 in the end of the clamping-bar 83, and thereby tosupportsaidclamping-bar. Thelowerend of the shaft is square in cross-sectionat 103 and engages a square hole 104 in a bevelgear 105. The bevel-gear 105 has a hub 106, which rotates in a bearing 107 in the bracket 108. The bevel-gear 105 meshes a bevel-gear 109, fast to a horizontal shaft 110, which extends lengthwise of the carriage- 26 and rotates in a bearing 111 therein. A rotary shaft 112 has bearings 113 at each end there of in each of the standards 94 and issquared off at one end to receive a crank-handle 114, fast thereto ,by a set-screw and by means of which said shaft 112 is rotated. The shaft 112 has an eccentric disk fast thereto, which bears against a roll 116, which is fast to a cross-shaft 117, which rotates in bearings 118 in the hanger 97.

When it isdesired to raise or lower the clamping-bar 83 to any considerable extent in order to adjust the same to varying, numbers and thicknesses of boards, the handle 114 is placed upon the square end of the shaft and rotatedin the proper direction, thus rotating the bevel-gears 109 and 105 and the shaft 100 and running the said clamping-bar up or down upon the screw-threaded portion of said shaft to the desired height. The final clamping of the bearing-plate 84 upon the stock is attained by placing the handle 114.

upon the square end of the shaft 112 and rotating said shaft through a part of one rotation, thus rotating the eccentric disk 115, forcing the hanger 97 down, and clamping the bearing-plate 84 against the stock 119. Upon turning the handle 114 in the opposite direction the disk 115 will release the pressure upon the roll 116, and the springs 90 will raise the clamping -bar and bearingplate away pulleys 129 129.

from the stock. The shaft 112 is employed when it is desired to remove the stock from the carriage 26 and replace a like amount thereon.

It will be seen that When'the final clamping of the bearing-plate 84 upon the stock is attained, as hereinbefore described, the hanger 97, together with the clamping-bar 83 and vertical screw-threaded shaft 100, will be forced downwardly and the square portion 103 of said vertical shaft will slide lengthwise in the square hole 104 in the bevel-gear 105.

The shaft 110 is employed when the amount of stock varies and it is desired to raise the clamping-bar and bearing-plate bodily.

The stock 119 after being clamped to the carriage 26, as hereinbefore described, is fed between two rotary cutters 120 and both edges of the boards trimmed to size and jointed by successive forward and reverse movements of the carriage 26; combined with the adjustment of the cutters 120 toward the center of the carriage, as hereinafter described. The rotary cutters consist of knives 121 bolted to blocks 122. Said blocks are fastened to vertical shafts 123, 'which rotate in capped bearings 124 upon the adjustable heads 125,

guided to slide in Ways 126 on brackets 127, fast to the sides of the frame 20. The cutter-shafts 123 are rotated by pulleys 128, fast thereto, and, rotated by belts to the One of the pulleys 129 is fast to the main driving-shaft 21. The other pulley 129 is fast to a Vertical shaft 130, which rotates in bearings in brackets 131, fast to the frame 20. The shaft 130 has a pulley 132 fast thereto and is rotated by a cross-belt from a pulley 133 on the driving-shaft 21. The direction of rotation of each of the pulleys is indicated by arrows, Fig. 3. The heads 125 are adjusted in a horizontal plane toward or away from the carriage 26 by screwthreaded shafts 134, each of which rotates in a bearing 135 in a plate 136, fast to the bracket 127, and are screwed into the heads 125.. A hand-wh eel 137 is fast to the outer end of each of the screw-shafts 134, and a collar 138 is fast tosaid screw-shafts on the opposite side of the plate 136 from the hand-wheel 137. The distance between the collar 138 and the inner face of the hub of the hand-wheel 137 is about one-eighth of an inch greater than the thick ness of the plate 136 for a purpose hereinafter set forth. It is evident that by rotating the hand-wheels 137 the heads 125 and the cutters 120 and the pulleys 128 thereon may be moved toward or away from the carriage 26, and thus the distance between said outters, and consequently the width of the boards carried by the carriage 26, may be varied as desired. I

When the carriage 26 is reversed, it is necessary that the cutters 120 should be moved away from said carriage a sufficient distance to clear the stock on said carriage upon said reverse movement-,the stock having then been sized, or about one-eighth .of an inch. To

' such adjustment;

accomplish this, I provide a rocker-arm 139, fast to the tre'adlerock-shaft 46, connected by 'a rod 140 to a rocker-arm 141. The rockerarm 141 is fast to a rock-shaft 142, which rocks in bearings 143, fast to the frame of the machine, and has a disk 144 fast to the righthand end thereof, Fig. 6. The hub 145 of the rocker-arm 141 and the disk 144 each have arod 146 pivotally connected thereto by a stud 147. The rods 1.46 enter holes 148'in' the head 125 to the right of the carriage 26, Fig. 5, and

are clamped thereto by hand set-screws 149.

The hub 145 of the rocker-arm 141 and the disk 144 each have arod 150 pivotally connected thereto by a stud 151. The rods 150 are clamped to the head 125 at the left of the carriage 26 by hand set-screws 149.

The operation of the cutter-clearing mechanism is as follows: Assuming the treadle 48 to be in its central position, the operator depresses said treadle, rocking the rock-shaft 46 to the right, Fig.6, lowering the rod 140 by meansof the rocker-arm 139 and rocking the hub 145, rockshaft- 142, and disk 144 in the direction of the arrow, Fig. 7. The

rods

146 and 150, actuated by said hub and disk, draw the heads 125, the cutters 120, and pulleys 128 toward the carriage 26 andthe hub of each of the hand-wheels against the outer face of the plate 136 in readiness for the stock to be fed foward by the carriage 26 and trimmed'by said cutters.

It is evident that the here inbefore-described mechanism by means of which the cutters are moved away from the carriage for clearance of the stock upon the return movement of said carriage is limited in movement according to the movement of the frictionpulleys 50 and 56 before they are brought into contact with the friction-pulley 65, and in order to increase or diminish said movement of the cutters for a given movement of the treadle and of the rocker-arm 139 I adjust the nuts upon the upper end of the rod 140 lengthwise of said rod, and thus tip the rocker-arm 141, together with the rock-shaft 142, and change the relative location of the pivotal stud 147 to a vertical plane passing through said rocker-shaft 142, the rod 140 being a loose fit in the rocker-arm 141 to allow It will be seen that in Fig. 7 the rod 140 and the rocker-arm 141 are so adjusted with relation to each other that the pivotal stud 147 will impart the greatest throw to the rod 146, and hence to the head 125, to which said rod is connected; but if by the adjustment hereinbefore described the pivotal stud 147 is thrown to the right of a vertical plane passing through the rocker-shaft the throw of the heads for clearance will decrease for a given motion of the treadle in proportion to the distance from said vertical plane to which said stud 147 is adjusted, it being evident that if said stud were adjusted to a snlficient distance to bring it into a horizontal plane passing through the rockshaft 142 there would practically be no throw or movement imparted to the head 125 by the motion imparted to the rocker-arm 141 by the treadle in moving the friction-pulley 50 or 56 into contact with the friction-pulley 65.

In Fig. 3 the heads 125, cutters 120, and pulleys 128 are illustrated in full lines. in their middle position and the position of the pulleys 128 in their extreme forward and rearward positions by dotted circles.

Thestock is located laterally upon the carriage 26 in proper relation to the cutters 120 by a gage 151. Said gage consists of a board 152, fast to a series of brackets 153, adjustably fastened by clamp-screws 155 to a series of adjustable plates 156, provided with slots 154 and adjustably fastened to brackets 157 by clamp-screws 159. The brackets 157 are fastened to the frame 20 of the machine. In the gage 151 the brackets 153 are adjustable by means of the clamp-screws 155 longitudinally upon the plates 156, and the plates 156 are adj ustable longitudinally upon the brackets 157, thus embracinga large extent of adjustment. To set the gage in the proper location with relation to the rotary cutters 120, the carriage is first stopped by the operator with the cutters ata point midway of the length of the carriage. A pattern of the Width required is clamped to the carriage and the cutterheads then brought up on both sides until in slowly rotating the cutters they just clear the edge of the pattern. The stock to be trimmed being usually one-fourth of an inch wider in the rough than when finished by the machine, by setting the gage one-eighth of an inch farther from the carriage than the cutters on the same side thereof and then placing the rough edge of the stock against the gage-board 152 the cutter on that side will trim off oneeighth of an inch of the stock, while the cutter on the other side will trim off the remainder of stock in excess of the required width, or substantially one-eighth of an inch.

The. operation of the machine as a whole is as follows: Assuming the carriage to be stationary and at the extreme end of its reverse movement or to the right of Figs. 2 and 4, the brake mechanism in the position shown in Fig. 7, the friction-

pulleys

50 and 56 both out of contact with the driving friction-pulley 65, and the cutter-heads 125 in the middle of the throw imparted thereto by the rods 146 150, disk 144, and hub 145, the operatorv places the stock upon the carriage 26 with one side thereof against the gage-board 152. 3

He then lowers the clamping-bar 83 by rotating the shaft 110, as hereinbefore described,

until the bearing-plate 84 rests against the upper surface of the stock. The final clamping pressure is now applied by giving the shaft 112 a partial rotation, as hereinbefore described. The operator next depresses the treadle 48 to the lowest position, (shown in dotted lines, Fig. 2,) bringing the frictionpulley 50 into contact with the driving friction-pulley 65, Fig. 6, and causing the gears and pinions to rotate in the directions of the arrows in said figure and the carriage 26 to move to the left, carrying the stock between the rotary cutters 120. The cutters 120 are at the same time brought toward the carriage 26 by the lowering of the treadle 48 by means of the

rods

146 and 150, as hereinbefore described. As soon as the stock has passed the cutters the operator releases the treadle quickly and the counterweight 49 through the connecting mechanism hereinbefore described throws the friction-pulley 50 out of contact and the friction-pulley 56 into contact with the driving friction-pulley and reverses the motion ot'the carriage 26 through the gearing hereinbefore described. At the same time the cutters are drawn back from the carriage, allowing the stock to pass between them upon the return movement of the carriage without coming in contact with said cutters. When the operator wishes to stop the machine, he releases the treadle and by the aid of the hand-lever 61 stops the brake-actuatin g rocker-arm in its central position, Fig. 8, and applying the brake-shoe 67 to the friction-pulley 56. The

frictionpulleys

50 and 56 are now both out of contact with the friction-pulley 65 and the machine will therefore stop.

Having thus described my invention, what I claim, and desire by Letters Patent to' secure, is

1. In a machine of the character described, a reciprocatory carriage, two vertical rotary cutters, one located at each side of said carriage, a reversing mechanism for imparting a reciprocating movement-to said carriage, and mechanism connected to and operated by said reversing mechanism to throw said vertical rotary cutters horizontally toward and away from said carriage a predetermined distance, substantially as described for the purpose specified.

2. In a machine'of the character described, a reciprocatory carriage, two vertical rotary cutters, one located at each side of said carriage, a reversing mechanism for imparting a reciprocating movement to said carriage, mechanism connected to and operated by said reversing mechanism to throw said vertical rotary cutters horizontally toward and away from said carriage a predetermined distance, and means to adjust said mechanism to vary said throw.

3. In a machine of the character described, a reciprocatory carriage, two vertical rotary cutters, one located at each side of said carriage, means for adjusting said cutters horizontally toward and away from said carriage, a reversing mechanism for imparting a reciprocating movement to said carriage, and mechanism connected to and operated by said reversing mechanism to throw said vertical rotary cutters horizontally toward and away from said carriage a predetermined distance.

4. In a machine of the character described, a reciprocatory carriage, two vertical rotary cutters, one located at each side of said carriage, means for adjusting saidcutters horizontally toward and away from said carriage, a reversing mechanism for imparting a reciprocating movement to said carriage, mechanism connected to and operated by said reversing mechanism to throw said vertical rotary cutters horizontally toward and away from said carriage a predetermined distance, and means to adjust said mechanism to vary said throw.

5. In a machine of the character described, a reciprocatory carriage, two vertical rotary cutters, one located at each side of said carriage, a'reversing mechanism for imparting a reciprocating movement to said carriage, two heads, upon each of which one of said cutters is arranged to rotate, said heads arranged to slide'simultaneously in opposite directions in horizontal bearings, and mechanism connected to and operated by said reversing mechanism to move said heads and cutters horizontallya predetermined distance toward and away from said carriage, substantially as described for the purpose specified.

6. In a machine of the character described, a reciprocatory carriage, two vertical rotary cutters, one located at each side of said carriage, a reversing mechanismfor imparting a reciprocating movement to said carriage, two heads, upon each of which one of said cutters is arranged to rotate, said heads arranged to slide simultaneously in opposite directions in horizontal bearin gs, mechanism connected to and operated by said reversing mechanism to move said heads and cutters horizontally a predetermined distance toward and'away from said carriage, and means to adjust said mechanism to vary said throw, substantially as described for the purpose specified.

7. In a machine of the character described,

a reciprocatory carriage, two vertical rotary cutters, one located at each side of said carriage, a reversing mechanism for imparting a reciprocating movement to said carriage, two heads upon each of which one of said cutters is arranged to rotate, said heads arranged to slide simultaneously in opposite directions in horizontal bearings, means for adjusting said heads horizontally toward and away from said carriage, and mechanism connected to and operated by said reversing mechanism to move said heads and cutters horizontally a predetermined distance toward and away from said carriage, substantially as described for the purpose specified.

8. In a machine of the character described, a reciprocatory carriage, two vertical rotary cutters, one located at each side of said carriage, a reversing mechanism for imparting a reciprocating movement to said carriage, two heads, upon each of which one of said cutters is arranged to rotate, said heads arranged to slide simultaneously in opposite directions in horizontal bearings, means for adjusting said heads horizontally toward and away from said carriage, mechanism connected to and operated by said reversing mechanism to move said heads and cutters horizontall y a predetermined distance toward and away from said carriage, and means to adjust said mechanism to vary said throw, substantially as described for the purpose specified.

9. In a machine of the character described, a reciprocatory carriage, two vertical rotary cutters, one located on each side of said carriage, a reversing mechanism for imparting a reciprocating movement to said carriage, two heads, upon each of which one of said cutters is arranged to rotate, said heads arranged to slide simultaneously in opposite directionsin horizontal bearings, a treadle fast to a rock-shaft and operatively connected to said reversing mechanism, a rocker-arm and mechanism connecting said treadle and rocker-arm to move said heads and cuttersa predetermined distance toward and away from said carriage.

10. In a machine of the character described, a reciprocatory carriage, two vertical rotary cutters, one located at each side of said carriage, two heads, upon each of which one of said cutters is arranged to rotate, a reversing mechanism for imparting a reciprocating movement to said carriage a treadle fast to a rock-shat t and operatively connected to said reversing mechanism, two rocker-arms, two rods, one end of each of said rods pivotally connected to one of said rocker-arms the other end fast to one of said heads, and a connection between said rocker-arms and treadle whereby the rocker-arms are rocked and said heads and cutters are thrown horizontally a predetermined distance toward and away from said carriage.

11. In a machine of the character described, a reciprocatory carriage, two vertical rotary cutters, one located at each side of said carriage, two heads, upon each of which one of said cutters is arranged to rotate, a reversing mechanism for imparting a reciprocating movement to said carriage, a treadle fast to a rock-shaft and operatively connected to said reversing mechanism, two rocker-arms, two rods, one end of each of said rods pivotally connected to one of said rocker-arms the other end fast to one of said heads, a connection between said rocker-arms and treadle whereby the rocker-arms are rocked and said heads and cutters are thrown horizontally a predetermined distance toward and away from said carriage, and means for adjusting the length of said connection, whereby the extent of said predetermined distance may be varied.

12. In a machine of the character described, a reciprocatory carriage, two vertical rotary cutters, one located at each side of said carriage, two heads, upon each of which one of said cutters is arranged to rotate, means for adjusting said heads toward and away from said carriage, a reversing mechanismfor imparting a reciprocating movement to said carriage, a treadle fast to a rock-shaft and operatively connected to said reversing mechanism two rocker-arms, two rods, one end of each of said rods pivotally connected to one of said rocker-arms the other end fast to one of said heads, and a connection between said rockerarms and treadle whereby the rocker-arms are rocked and said heads and cutters are thrown horizontally apredetermined distance toward and away from said carriage.

13. In a machine of the character described, a horizontal clamping-bar, a vertical screwthreaded shaft screwed into each end of said clamping-bar, a bevel-gear so connected to each of said vertical shafts as to allow said vertical shafts to slide lengthwise therein, a horizontal shaft, and bevel-gears fast to said horizontal shaft and meshing the bevel-gears on said-vertical shafts, and mechanism to depress said clamping-bar against the action of said springs.

14. In a machine of the character described, a horizontal clam ping-bar, a spring-supported hanger, and a vertical screw-threaded shaft screwed into each end of said clamping-bar connected to said hanger and arranged to rotate thereon, and mechanism to depress said clamping-bar against the action of said springs.

15. In a machine of the character described, a horizontal clamping-bar, a spring-supported hanger, a vertical screw threaded shaft screwed into each end of said clamping-bar connected to said hanger and arranged to rotate thereon, mechanism to rotate said vertical shafts, and mechanism to depress said hanger against the action of said springs.

16. In a machine of the character described, a horizontal clamping-bar, a spring-supported hanger, a vertical screw threaded shaft screwed into each end of said clamping-bar connected to said hanger and arranged to rotate thereon, a bevel-gear so connected to each of said vertical shafts as to allow said shafts to slide lengthwise in relation to said bevelgears, a horizontal shaft, bevel-gears fast to said horizontal shaft and meshing the bevel gears on said vertical shaft and mechanism to depress said hanger against the action of said springs.

17. In a machine of the character described, a horizontal clamping-bar, a hanger to which said clamping-bar is connected, springs supporting said hanger and clamping-bar, a friction-roll journaled on said hanger, a horizontal rocker-shaft, and an eccentric disk fast to said rocker-shaft and bearing against said friction-roll.

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

RICHARD s. HILL.

Witnesses:

CHARLES S. GooDINc, LOUIS A. Jonas.

ICC