US1302717A - Wood-planing machine. - Google Patents

Description

W. N. SAWYER.

WOOD PLANING MACHINE.

APPLICATION nuzo nzc.a. um.

1,3027 1 7. Patented May 6, 1919.

25 fnaentor UNITED STATES {PATENT oFFIoE.

WILLARD N. SAWYER, OF.WINCHENDON, MASSACHUSETTS, ASSIGNOR TO WILLIAM ITI.

WHITNEY, 0F WINGHENDON, MASSACHUSETTS.

wooD-rLAnIne MACHINE.

Specification of Letters Patent.

Patented May 6, 1919.

Application filed December 3, 1917. Serial No. 205,039.

ToaZZ whom it may concern:

Be it known that I, VVILLARD N. SAWYER, a citizen of the United States, residing in "Winchendon, county of lVorcester, and State of Massachusetts, have invented an Improvement in WVoodPlaning Machines, of which the following descriptioinin connection with the accompanyin drawings,is a specification, like characters on the draw ings representing like parts.

The invention hereinafter described relates to Wood planing machines and the like. It is customary to provide machines of this character with sets of rolls for feeding the work through the machine past a cutter. One roll of a set should be pressed yieldingly toward its companion roll in order that the rolls may conform to work of varying thickness and exert suflicient pressure thereon to grip and feed the same through the machine. I

It is necessary to adjust the journal boxes of the lower rolls from time to time to vary the elevation of said rolls and their relation to the upper rolls; and it is also desirable to vary the tension of the-springs which act on the rolls in order to vary the pressure thereof on the work. Heretofore, these adjustments have been diflicult to make, owing to the inaccessibility of theadjusting parts.

The present invention, among other objects, aims to provide a simple, readily accessible means whereby the aforesaid adjusgments may be conveniently and easily ma e.

ing description of one good form of the invention shown in the accompanying drawing, wherein Figure 1 is a side elevation of a portion of a wood planing machine having rolls pro vided with devices embodying the invention; and

Fig. 2 on an enlarged scale is a view showing said devices in vertical section.

Referring to the drawing, the machine shown therein comprises a frame 1 having the usual rotary cutter 3 mounted thereon and a bridge 5 opposed thereto for guiding and holding the work down to said cutter. To feed the work past the cutter, a set of upper and lower in-feed rolls 7 and 9 and a set of upper and lower out-feed rolls 11 and 13 are provided.

Roll controlling devices embodying the lnvention are shown herein as applied to the ends of the lower out-feed roll. Since the devices for both ends of the roll are similar, a description of one will suflice for both.

Referring more particularly to Fig. 2, the lower out-feed roll 13 is provided with a shaft 15 having an end journaled in a bearing box 17 adapted to slide vertically in a guideway 19 in the machine frame.

To support the box a vertical post 23 is provided projecting through an opening in the machine frame and having its lower end portion 25 threaded ina bore in said frame. A portion 27 of this post intermediate its ends may be slabbed off to receive a wrench which may conveniently be presented to said post through said opening. The post may be secured in different positions of vertical adjustment by a lock nut 29 adapted to bear on an edge of the frame above said bore.

A collar 31 loose on said post may be adjusted up or down by an adjusting nut 33 secured by alock nut 35.

, To yieldingly support the bearing box, a coil spring 3'? is provided encircling said post and confined between said lower collar 31 and an upper collar 39 upon which the box rests.

To limit upward movement of said box, by said spring, suitable stop means may be provided, in the present instance of the invention, in the form of an internal flange 41 on said collar adapted to engage the under v edge of a head &3 on said post. The character'of the 'invent1onmay be best understood by reference to the follow- There is, however a space between the top of' said head and the bottom of said box sufficient to permit the box to move downward somewhat against the resistance of said spring when work is passing between the rolls.

The tension of the spring may be readily increased without changing the elevation of the bearing box. To accomplish this the collar 31 is moved upward by the adjusting nut 83;

The head of the supporting post cooperates desirably with the upper collar to limit expansion of the spring. It will be noted that the top of the head is spaced from the top of the upper collar when the latter is pressed to its limit by the spring. As a. result, when the box is pressed downward, it can contract the sprmg until the box is limited by its engagement with the head of the post. If the post should be ad]usted sothat the top ofits head is beneath the bottom of the guideway' for the box, the downward movement of the box-willbe limited-by its engagement with the top of said head.

It will be noted that the screwand'nut' for controlling the elevation of the journal to a" scraperor other tool for treating the Work.

It will be understood that the inventionis not limited to thevspecific embodiment shownherein, but that extensive deviations-may be made, therefrom without departing from the spirit and scope of the appended claims;

What is claimed is: V 1. In a machine of the character described, the combination with a frame, of a cutter mounted thereon, means for feeding work relatively to the cutter including upper and lower feed rolls, shafts for saidrolls, bearing boxes for the shaft for the lower roll,

guides on said frame for said boxes, andsupporting means for saidiboxes, each including a spring, means=toadJustsaidsupport to vary the elevation ofthe boxyand means to vary the tension of said spring without varying the elevation of said box; 2. In a machine of the character described,

' the combination witlrupper and lower rolls,

of a bearing box for the lower roll, and means yieldingly to support said box comprising a post, a member movable on said post and serving as'a rest for the box, a coil springon said post to yieldingly support said movable member, and means to vary the tension of said spring without varying the elevation of said box.

3' Ina=machine offtlie'cliaracter described; the-combinationwitli unner and lower rolls, of bearingboxes for the lower roll, and devicesy'ieldi'n'gly to support said boxes, each comprising a post, a stop on said post, upper and lowercollars, one slidable and the'other adj ustableto different fixed positions on said post spring means confined between said collars and tending. to urge the upper collar toward said stop, and means bodily to vary the elevation of said post andthe parts carried thereby without disturbing the tension of I said spring means.-

4.111 a-machine'of the character described, the combination with an'upright frame-haw ing an open'ingtherein, ofa guide on said frame above said-opening, a. bearing box slidable in said guide, a post extending across. said opening 7 toward said box and having. means ustably securing. its lower end on said frame at the bottom of said opening," a pair of members on said post, one being. movable and supporting the box andthe other having. means for adjusting the same to different-fixed positions, and a coil-spring confined between said members to yieldingly sustain the movable member, accessto both of said adjusting means being had through said opening.

Inamachineofthe-character described, the combination of' upper and lower feed rolls, ofbearing boxes for saidrolls, and devices yielding-1y to sustain said boxes, each comprising. a supportingmember, a spring thereon, adjustable-means to vary the elevation .ofsaid supporting member, and adj ustable means to varythe tension of said spring without va-rying'the elevation of saidsupporting-,member;

In testimony whereof; I have signed my name to thisspecification.

VILLA-RD N. SAWYER.

Copies of this patent mayv be obtainecrmr five'cents each, by addressing-111': Commissioner ot-ilatentl.

Washington, D. 0!

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