US693893A - Machine for jointing staves. - Google Patents

Description

No. 693,893. Patented Feb. 25, 1902. I

H. u. PALMER. MACHINE FOR JDINTING STAVES.

(Application and May 29. 1901.) (No Model.) 3 sheets sheet l.

| I z l l Patented Feb. 25,1902.

H. U. PALMER. MACHINE FOR JOINTIN'G STAVBS'.

(.No Model.)

a Sheets-Sheet 2.

Patented Feb. 25, I902.

3 Shoats $hodt 3r E N @N H. U. PALMER. MACHINE FOB JOINTING STLAVES.

I (Application filed May 20, 1901.) ,7

(No Model.)

UNITED STATES PATENT OFFICE."

HENRYU. PALMER, OF NEW YORK, N. Y.

MACHINE FOR JOINTING STAVES.

SPECIFICATION forming part of Letters Patent No. 693,893, dated February 25, 1902. Application filed May 20, 1901. Serial No. 60,989. (No model.)

v citizen of the United States, residing at New York city, county of Kings, and State of New York, have invented certain new and useful Improvements in Machines for Jointing Staves, fully described and representedin the followingspecification and the accompanying drawings, forming a part of the same.

The object of the present invention is to provide an'improved machine for jointing staves, and especially to secure certainty in the jointing operation and high speed, while avoiding the liability of injury to the staves.

While my jointing mechanism may be used in jointing staves of any material and is a valuable improvement in the art, even in jointing elm staves, it has been designed by me in connection with what'are known as veener staves, made from wood cut in cylindrical veneers from logs which are usually of the Southern gum-tree. Such veneer staves are coming into general use and must super sede largely the elm and similar staves which have previously been used, as wood proper for'making such staves is becoming scarce and expensive. Injointing such veneer staves great difficulty has been found on account of the character of the wood and its lack of grain to aid in making the joint. With knifejointers the wood of veneer staves is liable to split or cut irregularly and to break away on the side of the stave on which the cut is completed, while the result of a hand or wheel jointer is to make the joint of veneer staves so smooth that they will not hold in setting up the barrel, so that in many cases it has been found necessary to chalk the edges of the staves to secure the desired grip. It is found also that pressing such staves to a-uniform shape in a jointing-machine employing forms curved to bend the stave into substantially bilge form and hold it under pressure while jointing is liable to break these veneer staves, as they vary considerably in form, and even if the staves were of uniform shape the bending longitudinally to bilge form would cause breakage;

An important feature of the present invention consists in jointing the staves WltllOLll? bending the staves or applying any considerable pressure fiatwise of the stave, thus avoiding dangerof breaking the staves. Many features of my improved machine, however, are applicable in machines of those classes in which the stave is pressed into form during jointing, and the invention includes various features of construction and combinations of parts which areof such general application,

the features forming the invention will then be specifically pointed out in the claims.

In the drawings, Figure 1 is a longitudinal side elevation of the machine with the staveholder partly broken away to show the construction. Fig. 2is a plan view of the same. Fig. 3 is a longitudinal central section of the jointing mechanism on the line 3 ofFig. 1 with a stave in-position for jointing. Fig. 4 is a vertical cross-section through thestaveholder on the line 4 of Fig. 1. Fig. 5 is a vertical cross-section through the jointing mechanism on the line 5 of Fig. 1. Figs. (Sand 7 are views similar to Fig. 5, showingthe jointing mechanism in different positions. Fig 8 is a cross-section on the line 8 of Fig. 1, showing the parts in the same position as in Figs. 6 and 7. Fig. 9 is a detail horizontal section on the line 9 of Fig. 1.

Referring to the drawings, A is the frame of the machine, in which are mounted the jointing and feeding mechanisms, with the holder B for the pile of stavesx to be jointed. The staves are fed singlyto the jointing mechanism by a reciprocating slide 0, actuated by a lever D, which is connected to the slide 0 by link 10, and is actuated from 'themain j acent surfaces of the bed and abutment are curved transversely to the stave to approximately the normal stave curve and the side edges are curved longitudinally of the stave, so as to coact with curved jointing-knives in cutting the stave on the proper longitudinal lines Without bending the stave longitudinally. The bed and abutment are each made in two parts, onestationary and the other mounted to swing, so that the movable parts F G of the bed and abutment may be moved toward the stationary parts F G for the jointing operation and separated and withdrawn during the feeding operation. The movable parts F G of the bed and abutment are carried byarms H, pivotally mounted on a horizontal axis on the frame A at 12, and are moved toward the stationary parts, F G by springs 13, connected to studs 1% on the arms H and frame, respectively, at opposite ends of the jointing mechanism, and the movable parts F G of the bed and abutment are moved away from the stationary parts F G against the tension of springs 13 by a horizontally-rotating cam 6t, which is carried by a vertical stud 16, mounted in a bracket 17 on the stationary part G of the abutment and about centrally of the length of the abutment, this cam abeing rotated to separate the parts of the bed and abutment through connections consisting of a crank-arm 18 on the stud 16, connected by link 19 to a vertical lever 20, pivoted on a bracket 21 on the frame A, this lever being actuated by means presently to be described. The opposite sides of the abutment G G formshearing-plates along which the jointing-knives cut, separate metal plates 22 being shown for this purpose, although itwill be understood that the opposite sides of the abutment may be suitably formed for this purpose in any desired manner. The jointing-knives I are mounted to reciprocate along the inclined and curved sides of the bed F F, one of these knives thus moving toward and from the other knife with the movement of the movable part of the bed F, by which the knife is carried. These knives I are mounted in slides 23, in which the knives are adjustable by a slot-and-bolt connection 2a and set-screws 25 below the knives, so that the exact vertical position of these jointing-knives can be secured and maintained. The slides 23 are pivotally connected bylinks 26, which are preferably made adjustable, as shown, by turnbuckles 1 to actuating-slides 27, mounted to slide vertically in frame A and carrying at their lower ends rollers 23, by which these slides 27 are moved positively up and down by means presently to be described.-

The slides 23, carrying the knives I, are held in position and actuated in their reciprocating movement by guides K, and these guides K are mounted so as to be readily adwhich these results are secured is as follows Each of these guides K is pivotally mounted at 29, one of the guides on the arms H and the other on the stationary part of the frame carrying the fixed portions of the bed and abutment, and the guides K are adjusted on these pivots by means of set-screws 30, tapped through horizontal arms 31 on the lower ends of the guides K, so as to secure a fine adjustment of these guides. the upper ends of the guides K have a slotand-bolt connection 32 with, respectively, the arms H and stationary frame, so that by For this adjustment loosening the bolts the guides may be swung to the limit of the slots and then held in position by tightening the bolts. A further lock of the guides K in adjusted position is secured by the bolts 33, passing through the guides K near their lower ends above the pivots 29. The guides K have the inwardly-projecting portions 34': at their upper ends, which serve as stops for the knife-slides 23; but the knives may readily be removed for grinding or renewal by loosening the set-screws 30 and bolts 32 33, so as to swing the upper ends of the guides K outward away from the abutment, thus providing space between the stops 34 and abutment for the removal of the knives.

For centering the staves 00 upon the bed F F for the jointing action I use rollers b, which are mounted loosely on studs 35 on opposite sides of the bed, which studs reciprocate verticallyin sleeves 36, mounted rigidly on opposite sides of the abutment G G, so that one of these rollers 12 moves in and out with the movable part of the abutment G. On the stationary bed side I preferably use two rollers, as shown, separated sufficiently to get two edge bearings for the stave, so as to avoid all danger of the stave swinging edgewise in feeding in, which might result in throwing the stave outof proper position relatively to the knife, and I thus assure the central position of the stave. It will be understood, however, that this feature of a centering device with prolonged bearing on one side is not essential to the invention and that a single roller or two or more rollers on each side may be used. The studs 35 are reciprocated vertically by bell-crank levers 37, having a slotted connection with pins 2 on the studs and projecting through vertical slots in the sleeves 36, these bell-crank levers 37 being connected by links 38 to vertical levers 39, pivoted on bracket 40 in the frame, these levers 39 being actuated by means presently to be described.

Turning now to the means fol-actuating the parts of the jointing mechanism, L is a slide moving horizontally below the jointing mechanism on guides 41 in the frame, this slide being shown as actuated from the drivingshaft S by a grooved cam M, acting on camrod N, connected to the slide L. The slide L carries cams 0 cl at opposite ends, between which cams are the rollers 28 on slides 27, the

cam c acting through rollers28 to force the slides 27 upward for the jointing action of the knives I and the cams d acting through the rollers 28 to draw the slides'27 downward and withdraw the knives after the jointing action. This slideL also receives in a recess in its upper surface the lower ends of the levers 39, so that the reciprocating movement of the slide L rocks the levers 39, and thus raises and lowers the rollers I) through the catch 6, being returned into position against the guide and stop 41 behind the catch 6 again after passing the catch by the spring 42, which has one end connected to the lever 20 and the other endto a pin 43 on the frame. The lever 20 is rocked from the position shown in full lines in Fig. 1 to the position shown in dotted lines in the same figure by the rotation of the cam a by the inward movement of the movable part of the abutment G under the pressure of springs 13, thelower end of the lever 20 being then sprung sidewise, so as to be no longer held by the catch e. The lever 20 is sprung sidewise for this purpose bya stripf, having an inclined camsurface and mounted on the lever D in such position that the inclined surface will engage the lever 20 and spring it sidewise beyond the end of catch 6 when the lever D reaches the end of its movement in feeding a stave, as shown in dotted lines in Fig. 1.

The operation of the machine will be understood from a briefdes'cription in connection with the above, Figs. 1 to 5 showing the machine in the position the parts occupy when a stave has just been out by the jointing-knives, the knives withdrawn, and the machine about to feed forward another stave for jointing, while Fig. '6 shows the parts in position after a stave ,hasbeen fed in for jointing, and Fig. 7shows the position of the parts just at the completion of the actionof the jointing-knives. Starting with the position shown in Figs. 1 to 5, the feeding-slide C is moved forward from the position shown in full lines in Fig. 1 to that shown in dotted lines, thus feeding a stave over the bed in the slot between the bed and abutment, which stave forces out the previously-jointed stave. The stave is thus fed in position between the rollers 17, which are now in their lower position, directlyoppositetheedgesofthestave. During this feeding operation the two parts of the bed and abutment and the rollers 19 are in their outer separated positions, held apart by the cam a, which cam is now held against being rotated by the catch on the slide L engaging the lower end of lever 20,- as shown in Fig. 9. Just as thefeeding movement is completed, however, the trip f on the lever D engages the lever 20 and springs it sidewise against the tension of spring 42, so as to release itfrom the catche and the pressure of the springs 13 on the arms H. Then throw inward the movable parts of the bed and abutment F G, with the rollers 11, thus rotating cam a and moving the lever 20 from'the position shown in, full lines in Fig. 9 to that shown in dotted lines in the same figure. This movementof the movable parts of the bed and abutment and the movable rollers 19 brings the parts into the position shown in Fig. 6, and thus by the pressure of the rollers b on opposite sides of the stave centers the stave'accurately for the jointing operation under the spring-pressure of the springs movable jointingknife positioned under spring-pressure, it will be seen thatthe ma chine is self-adjusting, so that staves of varying widths will be jointed accurately by the machine. The feed-slide C is now returned to position vby the lever D and the slide L is movedto the left from the position shown in Fig. 1 for the jointing operation. As this slide is thus moved the cams c, engaging the As the stave is thus centered and the rollers 28, move the rollers and slides 27 up-.

ward, thus forcing the jointing-knives I I upward along the inclined surfaces on the opposite sides of the bed and abutment, thus- This movement of the.

jointing the stave. slide L also, through the action of the slides on the lower ends of the lever 39, rocks the bell-crank levers 37, so as to draw the studs 35 upward in the sleeves 36, and thus raise the rollers bin advance of the j ointing-knives I, so as not to interfere with the actionfof the knives. All of the parts are now in the position shown in Fig. 7, in which the stave hasbeen raised against the abutment G G by the upward movement of the knives and jointed by the latter. now returned to the position shown in Fig. 1, the cams 01 during this movement acting through the rollers 28 to draw the slides 27 and jointing-knives downward, and the slide L also during this movement swinging the levers 39, so as to rock the bell-cranks 37 and carry the studs 35 downward to bring the rollers 6 again opposite the edges of the stave. During this movement of the 'slide L the catch e also swings the lever 20 from the position shown in dotted lines in Fig. 9 to that shown in full lines in the same figure,and thus rotates the cam a from the position shown in Figs. 6 and 7 to that shown in Fig. 5,so as to separate the parts of the bed and abutment and the rollers 19 for the feeding in of another stave, thus restoring all the parts to the position shown'in Figs. 1 to 5.

IIO

The slide L is My invention provides a'very efficient and rapid machine for jointing staves, by which an accurate joint maybe secured although the staves differ in width and form, while danger of injury toevenve'neer staves is avoided. It will be seen that the jointingknivescut from the inside of the stave out ward, so that any breaking away of the material of the stave on the side at which the cut is completed will injure only the outside of the stave and barrel and a good joint will be secured on the inside of the barrel where it is needed, the splitting of the material on the outside being immaterial so long as the inside surface and joint'are complete. The stave is accurately centered and both sides of the stave are jointed at once, so that both sides of the stave must be similarly cut and all variations which might result from a different positioning of the stave in jointing its opposite edges are avoided. While it is not absolutely essential that a knife with a straight edge-that is, an edge not curved or inclined fiatwise of the stave-should be used, this is very desirable in jointing staves that are not bent longitudinally to bilge form, especially in jointing veneer staves, as there is much less danger of injury to the stave if the knife enter and leave the stave at thesame time throughout its length.

While the jointing mechanism and'certain features therein may be used and form a part ofmy invention without the stave-feeding mechanism and this jointing mechanism may be fed by hand or any suitable means with the staves introduced either longitudinally or sidewise, automatic feeding mechanism is preferably used, and it is found that feeding the staves longitudinally instead of sidewise has great advantages, in that warped staves or staves curved transversely can be handled with certainty and accuracy, while such staves cause great difficulties in feeding the staves sidewise. Such longitudinal feeding mechanism is especially important in connection with veneer staves.

It will be understood that modifications may be made in the construction of the machine shown without departing from theinvention defined by the claims and that certain features of the invention may be embodied in constructions not employing other features of the invention. \Vhile the use of two knives for jointing both sides of the stave atone setting of the latter is preferable and some of the claims are thus limited and important advantages are thus secured, the use of a single knife for jointing one side of a stave is within the broader features of the invention.

While I prefer to use a bed and abutment made in two parts, so as to be self-adjusting to staves of different widths, as shown, and with one of these parts stationary and the other movable, it will be understood that this arrangement may be varied and that other changes in the construction and relative operation of the stave-holding mechanism and knife or knives may be made while retaining the features claimed.

What I claim is= j j g l. The combination with a bed and abutment fixed relatively to each other fiatwise of the stave with space between them for feeding in the stave, of a jointing-knife mounted to out outward from the inner side of the stave, substantiallyas described.

2. The combination with a bed and abutment curved transversely to the stave and fixed relatively to each other fiatwise of the stave with space between them for feeding in the stave, of a jointing-knife mounted to cut radially outward from the inner side of the stave, substantially as described.

3. The combination with a bed and abutment fixed relatively to each other fiatwise of the stave with space between them for feeding in the stave, of jointing-knives for the opposite edges of the stave mounted to cut outward from the inner side of the stave, substantially as described.

4. The combination with a bed and abutment curved transversely to the stave and fixed relatively to each other fiatwise of the.

stave with space between them for-feeding in the stave, of jointing-knives for the opposite edges of the stave mounted to cut radially outward from the inner-side of the stave, substantially as described.

5. The combination with a bed and abutment curved transversely to the stave and having their opposite side edges inclined radially transversely to the stave and fixed relatively to each other fiatwise of the stave with space between them for feeding in the stave, of jointing-knives for the opposite edges of the stave mounted to cut radially outward from the inner side of the stave and along the edges of the bed and abutment, substantially as described. i 6. The combination with a bed and abutment curved transversely to the stave and fixed relatively to each other fiatwise of the stave with space between them for feeding in the stave, said bed and abutment having side edges curved longitudinally of the stave, of curved jointing-knives for the opposite edges of the stave mounted to cut radially outward from theyinner side of the stave and along said edges of the bed and abutment, substantially as described.

7. The combination with a bed and abutment curved transversely to the stave and straight longitudinally and having their opposite side edges inclined radially and curved longitudinally, said bed and abutment being fixed relatively to each other fiatwise of the stave with space between them for feeding in the stave, of curved jointing-knives for the opposite edges of the stave mounted to cut radially outward from the inner side of the stave and along said edges of the bed and abutment, substantially as described.

8. The combination with a bed and abutment curved transversely to the stave and straight longitudinally and having their opposite side edges inclined radially and curved longitudinally, said bed and abutment being fixed relatively to each other flatwise of the stave with space between them for feeding in the stave, of curved jointing-knives forthe opposite edges of the stave having straight edges and mounted to cut radially outward from the inner side of the stave and along said edges of the bed and abutment, substantiallyas described.

9. The combination with an abutment having its opposite side edges inclined radially and curved longitudinally, of curved jointing-knives for the opposite edges of the stave mounted to cut radially outward from the in nor side of the stave and along said edges of the abutment, substantially as described.

10. The combination" with an abutment curved transversely to the staveand straight longitudinally of the stave and having its opposite side edges inclined radiallyand curved longitudinally, of curved jointing-knives for the opposite edges of the stave having straight edges and mounted to cut radially outward from the inner side of the stave and along said edges of the abutment, substantially as described.

11. The combination with an abutment made in two parts having relative movement edgewise of the stave, of stave-jointing knives for the opposite edges of the stave having the same relative movement as the two parts of the abutment, and means for pressing said parts of the abutment together under yielding pressure for the jointing action and separating them for the receipt and delivery of staves, substantially as described. 7

12. The combination with an abutment made in two parts having relative movement edgewise of the stave, of stave-jointing knives and centering devices for the opposite edges of the stave having the same relative movement as the two partsof the abutment, and means for pressing said parts of the abutment and centering devices together under yielding pressure for the jointing action and separating them for the receipt and deliveryof staves, substantially as described.

13. The combination with an abutment made in two parts one part being stationary and the other movable toward and from said stationarypart edgewise of the stave, of jointing-knives for the opposite sides of the stave, one coacting with the stationary part of the abutmentand the other coacting with and carried by the movable part, and means for moving themo vable part toward the stationary part under yielding pressure for thejointing action and away from the stationary part for the receipt and delivery of the staves, substantially as described.

14. The combination with an abutment made in two parts one part being stationary and the other movable toward and from said stationary part edgewise of the stave, of j ointing-knives for the opposite sides of the stave, one coacting with the stationary part of the abutment and the other coacting with and carried by the movable part centering de vices carried by the movable and stationary parts, and means for moving the'mova'ble made in two partsone part being'stationary staves, substantially as die;

15. The combination with an abutment and the other mounted to'swing toward and,

from said stationary part edgewise of the stave, of j ointing-knives for the opposite sides of the stave, one coactingwith the stationary part of the abutmentand the other coacting with and carried by the movable-part, and

means for moving the movable parttoward the stationary part under yielding pressure" for the jointing action and away from the stationary part for the receipt anddeliver'y of the staves, substantially as described;

t 16. The combination with a an abutment made in two parts one part being stationary and the other mounted to swing toward and from said stationary part edgewise ot' the stave, ofjointing-knives for the opposite sides of the stave, one coacting with the stationary part of the abutment and the other coacting with and carried by the movable part, centering devices carried bythe movable and stationary parts, and means for moving the movable part toward the stationary part under yielding pressurefor the jointing action and away from the stationary part for the receipt and delivery of the staves, substantially as described. I i

17. The combination with a bed and abutment on opposite sides of the stave made in two parts having relative movement edgewise of the stave, of stave-jointing knives for the opposite edges of the stave having the same relative movement as the two parts of the bed and abutment, and means for pressing said parts of the bed and abutment together under yielding pressure for the jointing action and separating them for the receipt and delivery of staves, substantially as described.

18. The combination with a bed and abutment on opposite sides of the stave made in two parts having relative movement edgewise of the stave, of stave-jointing knives and centering devices for the opposite edges of the stave havingthe same relative movement as. the two parts of the bed and abutment, and means for pressing said parts of the bed and abutment and centering devices together under yielding pressure for the jointing action and separating them for the receipt and delivery ot staves, substantially as described.

19. The combination with a bed and abutment on opposite sides of the stave made in, two parts one part being stationary and the other movable toward andfrom said stationary part edgewise of the stave, of jointingknives for the opposite sides of the stave, one coacting with the stationary part of the bed and abutment and the other coacting with and carried by the movablepart, centering devices carried by the movable and stationary parts, and means for moving the movable part toward the stationary part under yielding pressure for the jointing action and away from the stationary part for the receipt and delivery of the staves, substantially as described.

20. The combination with a bed and abutment on opposite sides of the stave made in two parts one part being stationary and the other mounted to swing toward and from said stationary part edgewise of the stave, of jointing-knives for the opposite sides of the stave, one coacting with the stationary part of the bed and abutment and the other coaetiug with and carried by the movable part, and means for moving the movable part toward the stationary part under yielding pressure for the jointing action and away from the stationary part for the receipt'and delivery of the staves, substantially as described.

i 21. The combination with a bed and abut ment on opposite sides of the stave made in two parts one part being stationary and the other mounted to swing toward and from said stationary part edgewise of the stave, of jointing-knives for the opposite sides of the stave, one coacting with the stationary part of the bed and abutment and the other coacting with and carried by the movable part, centen ing devices carried by the movable and stationary parts, and means for moving the movable part toward the stationary part under yielding pressure for the jointing action and awayfrom the stationary part for the receipt and delivery of the staves, substantially as described.

22. The combination with a bed and abutment on opposite sides of the stave, of jointing-knives for the opposite edges of the stave, and feeding mechanism for advancing the stave longitudinally between the bed and abutment, substantially as described.

23. The combination with a bed and abutment on opposite sides of the stave, of jointing-knives for the opposite edges of the stave, feeding mechanism for advancing the stave longitudinally between the bed and abutment, and centering guides between which the staves are fed in, substantially as described.

24. The combination with a bed and abutment on opposite sides of the stave, of jointing-knives for the opposite edges of the stave, feeding mechanism for advancing the stave longitudinally between the bed and abutment, centoring-guides between which the staves are fed in, and means for moving said centering-guides together to center the stave and are fed in, and means for moving said centering-guides together under yielding pressure to center the stave and moving the guides to release the stave, substantially as described.-

26. The combination with a bed and abutment on opposite sides of the stave, of jointing-knives for the opposite edges of the stave, feeding mechanism for advancing the sta ve longitudinally between the bed and abutment, and centering devices on opposite sides of the stave arranged to alternately center the stave for jointing and release the stave, substantially as described.

27. The combination with a bed and abutment on opposite sides of the stave having their opposite side edges inclined radially, of jointing-knives for the opposite edges of the stave mounted to cut radially outward from the inner side of the stave and'along the side edges of the bed and abutment, substantially as described. i

28. The combination with a bed and abutment on opposite sides of the stave having their opposite side edges inclined radially and curved longitudinally of the stave, of curved jointing-knives for the opposite edges of the stave mounted to cut radiallyoutward from the inner side of the stave and along the side edges of the bed and abutment, substantially as described. i i

29. The combination with a bed andabutment having their opposite side edges inposite edges of the stave mounted to cut radially along the side edges of the bed and abutment, feeding mechanism for advancing the staves longitudinally between the bed and abutment, and centering devices for pressing the stave into central position relatively to the knives, substantially as described. 31. The combination with stave-holding mechanism and reciprocating jointing-knives for the opposite edges of the stave, of feeding mechanism for advancing the staves longitudinally to the holding mechanism, substantially as described.

32. The combination with stave holding mechanism and reciprocating j ointing-knives for the opposite edges of the stave, of feeding mechanism for advancing the staves longitudinally to the holding mechanism, and centering devices for centering the staves relatively to the knives, substantially as described.

33. The combination with stave-holding mechanism and reciprocating j ointing-knives for the opposite edges of the stave, of feeding mechanism for advancing the staves longitudinallytotheholdingmechanism,centeringguides, between which the staves are fed in,

i and means for moving said centering-guides together to center the stave and moving the guides to release the staves, substantially as described.

34:. The combination with stave-holding mechanism and reciprocating j ointing-knives for the opposite edges of the stave, of feeding mechanism for advancing the staves longitudinally to the holding mechanism, centering-guides between which the staves are fed in, and means for moving said centering guides together under yielding pressure to center the stave and moving the guides to release the stave, substantially as described.

35. The combination with the abutment having the stationary part G and movable part G, of centering devices I) carried by the parts, means fol-pressing the parts G, G and devices together and separating them, and means for reciprocating said devices flatwise of the stave to move the devices away from the stave for the jointing operation and return the devices for centering the stave, substantially as described.

36. The combination with the bed and abutment having the stationary parts F, G and movable parts F, G, of centering devices 1) carried by the parts, means for pressing the parts F, F and G, G and devices together and separating them, and means for reciprocating said devices flatwise of the stave to move the devices away from the stave for the jointing operation and return the devices for centering the stave, substantially as described.

37. The combination with the bed and abutment having the stationary parts F, G and movable parts F, G, of centering devices I) carried by the parts, jointing-knives I, means for moving the parts F, G and centering devices toward and from each other, and means for reciprocating said centering devices in the line of movement of the knives, substantially as described.

38. The combination with the bed and abutment having the stationary parts F, G, and

movable part-s F, G, of centering devices I) together under yielding pressure and sepa rating the parts, substantially as described. 40. The combination with knife I and slide 23 carrying said knife, of pivoted guides K for said slide, means for adjusting said guides toward and from said knife, and means for adjusting said knife edgewise, substantially as described.

41. The combination with knife I and slide 23 carrying saidknife, of pivoted guides K for said slide, stops 34: onsaid guides, and means for adjusting said guides toward and from said knife, substantially as described.

42. The combination with knife I,of pivoted guide K having arm 31, set-screws 30 for adjusting said guide, and slotted-bolt connection 32 for locking said guide, substantially as described.

43. The combination with knife I, of pivoted guide K having arm 31, set-screw 30 for adj usting said guide, and slotted-bolt connection 32 and bolt 33 for locking said guide, substantially as described.

44. The combination with the jointing knives and centering-guides, of a slide provided with cams for actuating said knives, and connections between said slide and centering devices for moving them ahead of the knives and returning them to position, sub-- stantially as described.

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

'HENRY U. PALMER.

Witnesses:

S. WINTHAL, T. F. KEHOE.

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