US148213A - Improvement in planing-machi - Google Patents

Description

2 Sheets--Sheet 1.

Patented March 3,1874.

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Planing-Machines. N0 148 213. Patente d March 3.1874.

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UNITED STATES VILLIAM C. HORTON, .OF SALEM, MASSACHUSETTS.

IMPROVEMENT IE! PLANiNG-MACHINES.

Specification forming part of Letters Patent No. 148,213, dated March 3, 1874; application filed I February 31, 1874.

To all whom it may concern:

Be it known that I, WILLIAM G. HORTON, of Salem, in the county of Essex and in the State of Massachusetts, have invented certain new and useful Improvements in Planing-Machine; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification.

The nature of my invention relates to devices used for holding the lumber to be planed firmly down upon the bed of the machine, to prevent the knives from lifting the lumber, and thereby cause it to become wavy and it consists in the employment of two rollers of unequal diameter, the smaller one being located close to the path of the knives, while the larger is farther away from it. It also consists in the construction and arrangement of the devices in which said rollers are placed and supported, all of which will be hereinafter more fully set forth.

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation, referring to the annexed drawings, in which-- Figure 1 is a side elevation of the bed and standard, with the cutting-roller of a planingmachine with my invention attached thereto. Fig. 2 is a transverse vertical section, Fig. 3 a plan view, and Fig. 4 a rear elevation, of the same. Fig. 5 is a bottom view of the rollers, with the devices for holding them.

A represents the bed-plate of a planing-machine, with standards B B, in which the journals of the cutting or knife roller C have their bearings. On the inner side of each standard 13 is pivoted the front end of an arm, D, the pivot-point being located in front of and a trifle above the axis of the knife-roller O. The arm D, from this point, curves over the jour nal of the roller 0, and downward in rear of the same, and rests against a stop, a, on the inner side of the standard B. At this point the arm D turns, and extends straight toward the rear. At the angles or bends of the arms D D is pivoted a frame or housing, E, which is provided at the rear, on each side, with an arm, b, which rests upon an arm, (1, extending from the rear side of the standard B, to prevent the frame from falling down too far. In suitable bearings in the frame or housing E are placed two rollers, G and G, which are of unequal diameters, the larger one, G, being in rear, and the smallerone, G, in front. This latter roller is arranged ona line with the axis upon which the frame turns; or it may be a little in front or rear of said axis and the frame is so arranged that the roller G will bear upon the lumber close to the path of the knives, while the larger roller, G, is in rear thereof. On top of the frame is one or more springs, H, bearing against a cross-bar, I, which connects the two standards B B. This spring (or springs) may be of any desired or suitable construction, so as to exert the required pressure upon the rollers to hold the lumber firmly down upon the bed. The rollers G and G have each one or more .bearings turned on them at suitable distances from the ends, so as to be supported at one or more places between the ends, thereby overcoming any liability of the rollers springing upward from the lumber.

In most planing-machines now used, the knife-roller is arranged in such a manner as to be adjusted vertically up and down; and in such case the various devices above described are arranged to move up and down with the roller, so that they will retain their relative positions during any change in the positions of the knife-roller.

When lumber is first passed under the rear roller G, it will be seen that this roller is allowed to rise a short distance without interfering with the inside roller G, until certain stops or projections i i on the ends of the frame E strike the under side of the arms D D, when both the rollers will rise together. The inde pendent motion of the two rollers compensates for the unevenness of the lumber. The smaller roller, G, being located close to the path of the knives, holds the lumber firmly to the bed, preventing the knives from lifting the lumber up, which would make the surface thereof wavy.

The smaller roller, G, is supported or has its bearings in extended arms h h, formed on or attached to the frame F, so as to form, if desired, an open space between said roller and the front of the frame or housing, so as to prevent chips from clogging the smaller roller.

I am aware of the existence of Patent No. 146,500, of January 13, 1874, where a roller is shown connected to a frame pivoted to the frame of the machine, and in front of this roller is placed a spring presser-bar, to hold down the lumber. I disclaim such patent.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. I11 combination with the large roller, G, secured in a housing, E, pivoted to the frame of the machine, the small pressure-roller, G connected to the rigid extended arms h h close February, 1874:.

YVILLIAM O. HORTON. YV'tnesses:

A. N. MARK, J. TYLER POWELL,

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