The annexed engravings are views of an improvement in machines for planing and tongueing and grooving hoards and planks, hy Aretus A. Wilder, of Detroit, Mich. Figure 1 is a perspective view, and figure 2 is a central longitudinal section. The same letters of reference indicate like parts. The nature of the improvement consists in constructing planing machines so that the hoard to he planed can he clamped to the re-eiprocating hed, whilst heing led hy the hackward motion of the planes, so that the hoard will he free to move over the stationary hed plate upon which it is planed. A is a frame of suitahle size and form, hav ing cross hearings, a. Resting on these is a sliding frame, B, with incline planes, b, on its upper side, corresponding with and fitting against inverted inclines, c, on the underside oi the main hed, C. This frame is movahle longitudinally, hy means of the sarew, d, for the purpose of elevating and depressing the main hed to adjust it to the various thickness es of lumber to he placed, which is effected by the inclined planes on the frame, passing under in opposition to those in the underside of the bed, which ensures a solid bearing to said bed, and is essential in finishing the lumber of equal thickness. This bed has no lateral or longitudinal motion; the face of it is formed with a recess, e, near to each end across it, in which slide the reciprocating sectional beds, E E', the faces of which are slightly raised above the level of the main bed, to prevent the lumber from bearing too hard on the main bed, whilst being fed into the machine. The reciprocating beds are connected with each other by side rods, and have attached to them dogs, , which are hung in segmental brackets, g-, at each end of said beds, whereby they can be adjusted to suit the thicknesses of the lumber; the use of these beds and dogs is to draw the lumber into the machine and feed it into the side cutters by their backward motion. In returning they pass freely under and over it, whilst it is held fast by the dogs, F, which clamp the board between them and the main bed to prevent it from receding, whilst under the action of the surfacing planes. The centre part of the bed E', sinks through an opening in the main bed ; the un dersides of each are on the same level, leaving sufficient metal in each side of main bed to form slides for the bed E', to slide on and al low of recesses across its face in the direction of its motion which admit of a series of bars, i, on a level with the main bed, to give the lum ber a solid bearing under the last knife. The frame, G, which carries a series of knife stocks, H, bolted to it, transverse to and above the bed, is supported by bearings, m m, on slide, n, on either side of the frame, A, and on which it travels, having a reciprocating mo tion imparted through the rock shaft arms, I, which are connected with the wrist pins, 4, by the rods, J, at either side of the frame; the rods, K, connecting the downward arms of the rock shaft with crank pins, I, on either end of shaft, L, which is driven by any suita ble driving gear. To frame, G, are attached the sliding beds by rods, imparting a, like reciprocating motion to them. The knife stocks H, are graduated on their under side, each one rearwards, a little lower than that in advance of it; the face of each in its cross section, is parallel with the bed, and has its permanent mouth piece, r, cut away on the underside to the level of the heel of the knife stock in ad vance of it: the heel of the knife tock and its mouthpiece take equal bearing on the board ; o are set screws to adjust the knives, In operating the machine, the lumber is fed in as indicated by the arrow, and is caught by the dog on the reciprocating bed, and pulled in by its backward motion, on the return mo tion of which the board is held fast by the stationary dog, F, whilst the planes pass over it to the extent of their stroke, when it is again pulled in by the backward motion as they are secured to the stock by bolts, ), so thattheiredgesare exactly even with the heel, of the knife stock; the difference between the level of the mouth piece and that of the heel of the stock, will be the thickness of the sha. ving which each plane will take off, which is gradually reduced by each knife stock until the last knife takes the thinnest possible sha ving, and puts a fine finish on the lumber; M is a table at the rear end of the machine; before, and so on alternately; and when it has passed the surfacing planes, is fed into or between the siding planes, by the back action of the reciprocating beds and dogs, whereas the surfacing is performed during their for ward motion, thus equalizing as far as possi ble, the amount of work performed through out the entire revolution of the driring shaft. The claim is for " the reciprocating beds arranged with respect to the stationary bed in combination with the clamps attached to the plane stock, whereby the board is clamped be tween them, and is free to move over the sta tionary planing bed, and led during the back ward stroke." More information maybe ob tained by letter addressed to the inventor.