US1302718A - Wood-scraping machine and the like. - Google Patents

Description

Patented Mdy W; N. SAWYER.

. fiwentor fi amz If; Q

APPLICATION FlLED DEC- $1917.

WOOD SCBAPING MACHINE AND THE LIKE.

UNITED STATES PATENT OFFICE.

WILLARD 1v. SAWYER, or WINOI-IENDON, MASSACHUSETTS, AssIeno'n. To wiLLIAM M.

WHITNEY, 01E WINGHENDON, MASSACHUSETTS.

woon-scnarine MACHINE AND THE LIKE.

To all whom it may concern: i

Be it known that I, WILLARD N. SAWYER, a citizen of the United States, residing at Winchendon, county of Worcester, and State of Massachusetts, have invented an Improvement in Wood-Scraping Machines and the like, of which the following description, in

connection with the accompanying drawings, 'is a specification, like characters onthe drawings representing like parts.

This invention relates to wood scraping machines and the like.

Inmachines of this class, it is customary to employ upper and lower rollsfor feeding the work past thecutter or scraper through the machine.

convenience have been experienced in maksimple and effective adjusting devices which ing these adjustments, because the adjusting devices havebeen obstructed by parts of the machine and located where inaccessible and out of reachof the operator. The present invention, among other objects, provides are exposed at places where they are readily accessible and withineasy reach of'the operator at all times.

Another object is to reduce the wear on the journals and boxes by relieving the latter from the pressure of their springs except when the rolls are active in feeding work through the machine. p p

The character of the inventionmay be best understood by reference to the following description of one good form thereof shown in the accompanyingdrawing, wherein:

Figure 1 is a perspective view of ascra=pling machine having feed rolls journaled in boxes equ 'pped *with devices embodyingthe invention; p

Fig. 2 on an enlarged'scale is a vertical section through one of the boxes for one of .thewrolls; and 1 i ifihgufii :is .a vertical section taken at right Specification of Letters Patent.

Application filed December a, 1917. Serial No. 205,040.

Patented May-6, 1919.

angles to the section shown in Fig. 2, but showing a gear instead of a hand wheel for adjustment purposes.

Referring to the drawing, the machine "shown therein as embodying the invention comprlses a frame 1 having front and rear work supporting tables 3 and 5 "thereon.

Interposed between said tables is a stock 7 carrying the usual scraping knife 9 and having a handle 10 adapted to be grasped in pushing the stock intoand pulling the same out of the machine.

The rolls for feeding the work through the machine in the machine shown comprise a pair of lower infeed rolls lllocated at one side of the scraper, a pair of lower outfeed rolls 13 located at the opposite side of the scraper, a pair of infeed rolls 15 located above and mating with the lower infeed rolls 11, a pair ofoutfeed rolls 17 located above and mating with the lower outfeed rolls 13-,

and roll 19 located directly above and opposed to the scraper.

i The lower feed rolls are j ournaled in boxes 20 mounted in the frame in the usual mansame, a description of the box arrangement "at of one roll will suflice for all.

Referring now more particularly to Fig. 2,the roll has a shaft 21 journaled in a box guideway 25 in the machine frame.

' Since the construction and arrangement of i the boxes for all of the upper rolls is the To yieldinglypress the roll downward toward companion roll and against the "work, "a helical spring 27 is provided confined between a follower 29 and a collar 31.

Toflimitthe' upward movement of said collar and varythe tension of the spring, a

wheel 37 accessible above saidframe. A look nut 39' is threaded on said sleeve and bears against the top of said boss to secure the upper section 23 of the bearing box up sleeve "33 isprovided threaded in a boss 35 at the top of theframe and having a hand against the resistance of the spring. When d the work has passed the rolls, the spring will 7 upper roll is moved upward on introduction of work between the rolls, it will lift the upper section of the box and the follower with it,- thereby'lifting the legs of the follower up from the bottom of the boxv guide; but when the work has passed from between the rolls, the upper roll will move downward and rest upon the lower section of the box, and the legsof the follower will move down and into engagement with the bottom of the box guide. Thelegs aresomewhat longer than the height of the box and therefore when they engage the bottom of the box guide, the spring follower will be somewhat above the box andv the latter will be relieved from the pressure of the spring.

However, when the roll is lifted again,

the shaft thereof will lift the upper box .section and follower and bring the roll I under the influence of the spring.

.L'Thus. it'will be apparent that the roll shaft is relievedfrom the pressure of the spring at all times excepting when work I .is passing between the rolls. As a result the wear. 'on said shaft and its box is greatly reduced. 7

- It is desirable that the upper section of the box, shall move up merely a very slight distance before becoming effective to lift the spring pressed follower. To regulate this distance and take up any wear on the box or shaft, a rod may be provided having its lower end rounded and adapted to engage a I depression 47 on the top of the upper section of the box; A port 49 may be provided in said section communicating with a port 50 in the rod to facilitate oiling of the shaft. The lower end portion ofsaid rod may be threaded to said follower and the rod is sufficiently long to project up-through the collar adjustingsleeve and somewhat beyond the latter where it is provided with a squared, reduced end 45* for' receiving a wrench. To hold the rod in its different positions of adjustment a lock sleeve 51 may be provided encircling the rod and confined between the follower and a nut 53 on the upper end of said rod. By the construction described, it

will be notedthe upper'section of the box does not directlyen'gage the follower, but the connection is 'made through the rod.

The latter can be adjusted so that the box section will not need to move any substantial distance before engaging said rod, but said section can drop from said rod sufiiciently to relieve said section from the pressure of the spring when the follower legs drop into engagement with the bottom of the box guide.

The roll 19 which is directly above the scraper may be provided with a hand wheel controlled spring pressed box construction such as described since in the use of the machine it may be desired to produce a different degree of pressure upon the roll which is directly above the scraper from the pressure on the in and out feed rolls at the opposite sides of the scraper.

To simultaneously and equally vary the pressure of the springs for the in and out feed rolls, a box controlling means may be provided similar to that described with the exception that a worm gear 55 (Fig. 3) may be substituted for the hand wheel and its lock nuts shown in Fig. 2. The worm gears for the boxes at one side of the machine may be rotated by worms 57 (Fig. 1) fast on shafts 59, rotated in turn by a cross shaft 61 having skew gears 62 thereon meshing with skew gears 63 on the shafts 59. The cross shaft may be rotated by a large hand wheel 65 fast thereon at one end of the ma chine.

By this construction the upper in and out feed rolls may be quickly and easily simultaneously and equally adjusted. The worm wheels will desirably serve to hold the spring adjusting sleeves in their positions of adjustment.

The means for varying the tension of the springs which press on the boxes for the rolls and the rods for transmitting movement from the spring pressed followers to the boxes are conveniently accessible from the top of the machine for adjustment purposes. Thus the boxes at one end of the machine may be covered by the usual driving gears for the rolls without interfering with convenient adjustment of said rolls.

The means for relieving the rolls from the pressure of the springs operates automatically and since the rolls are pressed by the springs only when active in feeding work through the machine, the wear on the parts is greatly reduced and the life of the machine is desirably prolonged.

It will be understood that the invention is not limited to the specific embodiment shown herein, but that extensive deviations may be made therefrom without departing from the spirit and scope of the appended claims.

What is claimed is:

1. In a machine 'of the character described, a frame having a guideway therein, a bearing box movable in said guideway, a

feed roll having a shaft journaled in said box, a follower having legs straddling said box and adapted to engage an end of said guideway, and spring means acting on said follower.

2. In a machine of the character described, a guide, a bearing box comprising sections mounted in said guide, a roll hav-.

ing a shaft journaled in said box, a follower, a rod threaded to said follower for transmitting movement therefrom to said box, and spring means acting on said follower.

3. In a machine of the character described, a bearing box, a roll having a shaft journaled in said box, a spring, a follower pressed by said spring toward said box, and adjustable means for transmitting movement from said follower to said box.

4. In a machine of the character de scribed, a bearing box, a roll having a shaft journaled in said box, a spring, a follower pressed by said spring toward said box, and means to transmit movement from said follower to said box and having provision for Igompensating for wear on said shaft and *5. In a machine of the character described, a bearing box, a roll having a shaft journaled in said box, a spring, a follower pressed by said spring toward said box, a member threaded to said follower for transmitting movement from the latter to said box, a nut threaded on said member, and a lock sleeve confined between said nut and follower.

6. In a machine of the character de scribed, a frame having a guideway therein, a bearing box mounted in said guideway, a spring, a follower pressed by said spring toward said box, and an adjustable member for transmitting movement from said follower to said box and accessible for adjustment from the top of said frame.

7. In a machine of the character described, a frame having a guideway therein, a bearing box mounted in said guideway, a spring, a follower pressed by said spring toward said box, a sleeve for varying the tension of said spring, and a rod in said sleeve threaded to said follower and having an end for engagement with said box, said rod and sleeve bein accessible for adjustment from the top 0% the machine.

8. In a machine of the character described, a feed roll, a shaft therefor, split bearing boxes for said shaft, guides for said boxes, springs for pressing said boxes toward ends of said guides, means accessible from the top of the machine to take up wear on said boxes, and means accessible from the top of the machine to vary the tension of said springs.

9. In a machine of the character described, the combination of a frame having a guideway therein, a split bearing box having upper and lower parts mounted in said guideway, a roll having a journal between said parts adapted to press up against said upper part when active and down against said lower part when inactive a spring for said journal, and a follower etween said spring and said box having means to prevent pressure of said spring on the upper part of the box when the journal is resting on the lower part thereof.

In testimony whereof, I have signed my name to this specification.

WILLARD N. SAWYER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. 0.

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