USRE4738E - Improvement in planing-machines - Google Patents

Description

H. B. SCHE'NCK, W. T. Y. S CHENCK, & A. L. SCHENQK. lsheqw-sheeth Improvementin Planing Mach'|n'es.'. N0. 4,738. Reissued Feb. 6,1872.

2 Sheets-Sheet 2. H. B. SCHENCK, W. T. Y. SCHENCK, & A. L. SCHENCK. Improvement in Planing Machines.

No. 4,738. Reissued Feb-6,1812.

4 k ;m f

Specification forming part of Letters Patent delivery-guide of the machine.

UNITED STATES HENRY B. SOHENCK, WILLIAM T. Y. SOHENOK, AND ADELAIDE L. SOHENGK,

PATENT OFFICE.

OF MATTEAWAN, NEW YORK, ASSIGNEES, BY MESNE ASSIGNMENTS, OF

JOHN B. SGHENUK, DECEASED.

IMPROVEMENT IN PLANING-MACHINES.

Tocll whom it may concern:

Be it known that the following is a full, clear, and exact description of a new and useful Improvement in Planing-lvlachi'nes, invented by JOHN B. SCHENOK, now deceased, late of Matteawan, in the county of Dutchess and State of New York, reference being had to the accompanyin g drawing forming part of this specification.

This invention relates to new and useful im provements in machines known as Woodworth Planersf whereby they are made much more convenient and useful than they have been prior tothis invention. The invention consists: First, in a combination, with the facing cyIinder, of the introducing-guide and one of the matcher-heads, whereby said guide and matcher-head, without changing their relative positions, may be moved across the machine or relatively to the facing-cylinder so as to utilize the cutting-edges of the cutters or In the accompanyin g drawing, Figure 1 represents a top or plan view of the machine. Fig. 2, Sheet 2, is a vertical longitudinal section of Fig. 1 through the line y 3 Fig. 3 is a detailed view representing the oblique-toothed gearing, which is used for operating the guides and side-cutters of the machine. Fig. 4 is a detached section of Fig. 2 through the line z 2.

Similar letters of reference indicate correspondin g parts.

A represents the introducing-guide and B a These guides are separate, and may be separately adjusted; but they are represented as arranged so that much valuable time.

No. 84,460, dated February 2, 1869; reissue No. 4,738, dated February 6, 1872.

they may be moved simultaneously across the machine, and so that their relative positions are preserved. The introducing-guide A is connected with and moved by the screw-shafts O G. The screws 0 U are revolved by means of the oblique-toothed gearing seen at D D and the shaft E, F represents the facingcylinder, upon which the facing-cutters are placed. G G represent the matcher-heads or side cutters for reducing the width and matching the lumber.. The matcher-head G, and introducing-guide A also, when such device is used, the delivery-guide B, are made capable of motion crosswise of the machine and their relative positions maintained at all times. This may be efl'ected simultaneously by revolving the shaft E. By thus rendering the introducingguide and one matcher-head adjustable relatively to the facing-cylinder, as described,

and so that said devices preserve their relative positions, it is practicable to use the facing-cutters throughout their entire length, thus greatly increasing their usefulness and saving J J represent the lower feed-rollers, and K K the upper introducing feed-rollers. L represents the piece of lumber to be operated upon. N represents the pressure-roll or bar, whichever may be used. This roll or bar-is placed immediately in the rear of the facing-cutters, asseen in the drawing. The pressure is brought to bear upon the upper feed-rollers from the weights 0 O on the levers P P, connecting-bars R R, and saddles S S.

The pressure-roll N is connected with two short horizontal levers, T T,which have their fulcrums at a. V is a broad bar which extends across the machine, and in this example of my invention forms the connection between the pressure-roll and the levers T T. w is a rod which extends across the machine, the ends of which project through the levers T T and rest in hearings, on the ends. of the saddles S, which rest on the feed-roller boxes, as seen in the drawing.

The effect of this arrangement is as follows: When the piece of lumber is introduced and drawn under the feed-rollers K K they are raised more or less according to the thickness of the lumber, so that the weights 0 0 will press them to the lumber and draw the lumber into the machine.

The pressure-roll N is necessarily made small in diameter, so as to bring its bearing-surface on the lumber as near as practicable to the cutters. Said roll is consequently not so readily raised by the contact of the piece of lumber as the larger feed-rollers, and where much is to be taken or cut from the lumber a sudden jumping motion is produced,which sometimes produces disastrous consequences. The arrangement is such that the relative position of the feed-rollers and the pressure-roll are preserved, whether the lumber has more or less to be taken off. For instance: the proper position of the pressure-roll is one-eighth of an inch below the bottom of the upper feed-roller orrollers; and if a board is introduced which raises feed-rollers, say five-eighths of an inch, by the arranging the parts so that the feed-roller K shall raise the pressure-roll or barwhichever may be usedfive-eighths of an inch their relative positions-i. 0., the pressure-roll one eighth .of an inch below the feed-roller-would be maintained and all danger avoided. This eighth-ofwan-inch projection of the pressureroll is necessary to give the required pressure upon the board. This is accomplished by raisin g the projecting ends, of the bar w, which rest I V on the saddles S, by the board to be dressed. .This' motion raises the levers T T, which are directly connected with the bar 0; and pressure roll, so that when the board is brought under the pressure-roll or bar such roll or bar is raised only one-eighth of an inch instead of fiveeighths, as it would be without this device. The advantages of this arrangement will be at once manifest. The pressure-roll being only about two inches in diameter, five-eighthsof an inch would be niore than it could be safely raised with the weight upon it; and just so when the pressure-bar is used, which is sometimes broken and carried into contact with the cutters, when a thick piece of lumber is introduced; or perhaps the roll or bar will refuse to rise at all, and the lumber is stuck, the feed is stopped, and the gearing is strained, involving great liability to dangerous accident. This arrangement renders the collision of the roll or bar with the end of the lumber perfectly harmless.

Thearrangement for adjusting the weight on the pressure-roll or bar, to prevent the canting or tipping of the roll and equalizing the pressure on the surface of the lumber, is seen in the drawing, where L represents a weighted lever, which is made to slide on the rodm, by which rod the two short levers T T are connected, so that the weight as may be made to bear directly over the piece of lumber in the machine.

The lever may be dispensed with and the weight be made to slide upon the rod m. The

lever is preferable, because by shifting the weight upon it the amount of pressure may be varied according-to the width of the lumber.

The invention is not confined to the particular methods employed for producing the results named. It is known that the details may be varied somewhat and the same or similar results be obtained;

Having thus described the invention, what is here claimed, and desired to be secured by- Letters Patent, is- 1. The combinationof the guide Aand the matcher-head Gr, adapted to be moved relative- 1y to the facing-cylinder F, substantially as herein described, for the purpose specified.

2. The combination of the feed-roller K, saddles S, rod to, levers T, and bar V with the presser-roll N, substantially as described, for the purpose specified.

3. The combination of theadjustable weight, the levers T, and bar V with the presserroll N, whereby the weight is adapted to bear directly over the piece of lumber'being dressed, substantially as described, for the purpose specified.

HENRY B. SOIIENOK. WM. T. Y. SOHENGK. ADELAIDE L. SCHENOK.

Witnesses:

' E. S. PHILLIPS,

WM. H. BUTLER, Jr.

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