US16157A - Method of - Google Patents

Description

UNITED STATES PATENT OFFICE JOB IVHITE, OF BELFAST, MAINE.

METHOD F APPLYING STEAM T0 AND OF CUTTING SCARFS FROM WOOD.

Speccation of Letters Patent No. 16,157, dated December 2, 1856.

To all 'whom 'it may concern:

Be it known that I, JOB IVI-UTE, of Belfast, in the county of Valdo and State of Maine, have invented a new and useful Improvement in the Machines for Cutting Pan-els for Carriage and other lVork and Veneers Around and Off the Circular Surface of a Log; and I do declare that the fol-4 lowing is a full and exact description thereof, reference being had to the accompanying drawing and to the letters of reference marked thereon.

The machine is constructed in two parts as represented. in Figures l and 2.

Fig. l represents a front view of the log frame with the log set and is intended to show the construction of the gear producing the revolving motion of the log, as well as that which raises the log and frame, to bring the diminishing surface of the log into a continuous and similar line of contact with the cutters, thus gaging the panel to the saine thickness.

V V V V V V is simply the permanent frame or fixed part of it.

A is an upright iron shaft upon which is set an iron disk, upon the upper surface,

`and outer edge of which the cutters are set.

B is one of the cutters as seen beneath the screen at the point of contactl with the log.

C is a sliding beam upon the top of which. are fixed two inclined planes which pass under two transverse bars. The planes D D recede with the sliding beam as the log diminishes in size and are the guides which govern and keep steady the rise of the log frame. The sliding beam is moved and the planes recede with it by means of a rack G inserted in the under side of it meshing with the wheel H. Wheel I-I gears upon an endless screw I which is upon the arbor upon which the log is set and which arbor turns with the log. Upon the same arbor is another wheel gearing upon a pinion J. Cn the arbor upon which pinion J isset is a ratch wheel K with pawls or hands fixed upon an upright lever L.

The movable log frame is marked Y Y Y Y.

F is a screen made of thin stuff, passing down to the edge of the disk so as to guide the cut up over the roller E.

M is the head of a steam pipe, which is clothed with canvas and which carries on to the log, upon the quarter directly before the cutters the steam or hot air.

Fig. 2, as in Fig. l, the Xal parts of the frame work are marked V V V V. The moving frame in which the disk revolves is made to move from right to left and left t'o right, so that the cutters pass clear from the log at each end by means of two cams O, to the lower' end of one of which is attached a crank by a connecting rod. The beam P P, travels upon the cam C being connected therewith by a chain at reverse sides, or may be geared upon them.

The revolving motion of the disk B is produced by a belt passing upon drum A, which belt is guided and held steady, in the right and left oscillations of the frame. and shaft by a jack pulley and crane, which crane swings by a pulley and weight one way, and by the pressure upon it the other.

IV is an arm with a knob which in the lateral motion of the frame, comes in contact with the top of a spring lever or trip staff and to the top of which staff is attached a cord which draws back the pawl lever so as to allow the pawls to feed a tooth and force the ratch wheel to move by the weight attached to the end of the cord, turning the log and raising the frame at the moment the cutters have passed througlrthe kerf either way.

Fig. 3, as in the other figures the permanent parts are V V.

O is an end view of the cam.

P the end of the beam that passes upon it causing the arm vVV to bend the spring lever or trip staff Q, drawing back the pawl lever L by means of the cord attached, over the pulleys R, R.

Fig. Ll, represents a set of teeth or cutters and shows the mode in which I construct and fasten them upon the disk.

1 is simply a smooth projection of steel without edge, and of the same thickness of scarf. Its use is to clear the scarf from chips before the cutters. 2 and 3 are cutters, the one is beveled on the upper side to a thin edge, the other on the under side in the same mode the difference of the bevel giving the thickness of the scarf or core to be removed and gaging it, 4L takes out the core thus gaged by 2 and 3. The cutters I make upon one piece and fasten them on the disk by a screw through a slot by which I can enlarge the diameter of the circle they describe.

The foregoing is a correct description of the machine I now have in successful operation.

.I do not claim in this speciicat-ion the dis* l beam, in combination with the feeding gear,

covery or invention of the cutting a board from the circular surface of a log by means of a circular revolving disk with cutters, moving laterally, that Was patented by me and Phineas P. Quimby Sept. l2, 1829, as per record of the Patent Otlice Will appear. That machine never was able to Work with any degree of facility or success, and has always remained my exclusive property, nor

dol claim that steaming mode for the pur# by which the perpendicular and rotary motion of the log is made immediately after the cutters have passed through, giving exact feed to continue a circular scarf around the diminishing surface of the log, making a board of uniform thickness.

2. The mode and arrangement by Which I apply steam or heat to a log in the process of being sawed by Which I am able to apply it to the surface of the log immediately before the cutters and at the particular time and place required for the Work designed. rlhe same result may be obtained by a cast iron hollow form by Which you may apply either steam or heat to the surface of the log.

J OB I/VHITE.

Vitnesses:

A. T. PALMER, S. C. PALMER.

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