US1663794A - Rosser - Google Patents

Description

c. E. CLOWES ROSSER March 27, 1928. 1,663,794

Filed Feb. 24, 1927 Invert tor Patented Mar. 27, 1928; I

v UNITED sr r ewes CHARLES ERNEST cLoWEs, or nnnnnnroron, NEW-BRUNSWICK, CANADA.

ROSSER Application filed February 24, 1a'2'7. Serial No. 170,576.

The invention relates to improvements iii rossers as described in the present specificasupportingthe log during such operation,

whioh may be ofconventional or special 'de- According to the present invention, a log,

hereinafter referred to as the; stick, is

I slowly revolved and held againsttravelin'g instruments set at anegativeangle'in order to rose the stick'by scraping off the bark. These scrapers move lengthwise of the :log so as towork with the grain, the log being held side-on, the gradual rotation effecting complete removal of the bark.

The scrapers are designed to 'be adjustable" so that the angle of contact may be changed to suit different species and condition of wood. For instance arun of logs which are hard or frozen will necessitate. that the angle of inclination be lessthan that for handling softer or newly cut wood;

A very distinctive feature of the present inventionlies in the mounting of the scrapers whereby they accommodate themselves to irregularities of the sticks surface to the end thatupon encountering a knot or other obstruction they ride over it. Other features will become manifest as the description proceeds. i p V,

In the drawings, Figure 1 is a side elevation of'the invention slightly in section, depicting in conjunction therewith apart of the workholding device,

Figure 2 is a front end elevation of Figure 1.

Figure 3 is a detaile d-planview ,of one of the links of the endless band.

Figure 4 is a sectional view taken on the line 4-4 of Figure 3.

Figure 5 is a diagrammatic View ex log is held hinting the aches of the gem' ers in pass-' mgover irregularitiesof the logs surface,

, Like numeralsof reference indicate corresponding parts in each of the .figure's throughout the drawings.

In the drawings thereference numeral'lO designates the log. or stick which islshown supported by means of a workh'older gen'-- erally indicated by the numeral '11. This workholder is shown by way .of example and not of limitatiionas it willibe readily apparent to those skilled in the art that there are numerous typesof workhelders which might be equally well employed: that shown in the drawings consists of an endlessfbelt 12 upon. which the driven fromi'a sonrce of power. 14 is an end stop, for tal'rin'gfaxial thrust of the log due to the scraping action ofthetools. 1:5 is a side rest for centeringthe log. The rotation of the endless beltjl2slowly revolves the log andthe rest 15 prevents itslateral movement,- so that by this construction the what-is generally known as" sideon against the scrapers;

16 generally indicates theendless band 10 rests; -Sa id'bltis passed overpulleys 13 whichare suitablycomposed of links as at 17. The band is" carried at its forward end "byi'sprockets 1 8,

18', and at its rear end by further sprockets are supported shafts 19.. These sprockets as .at 20, onepair of nected to a source of the driver. Intermediate of each .linkis a scraper as atv 21, while on theother side is a. rolleras at'22 which travels over a rail 23 in order to hold thescrapers against the logand take the thrust thereof. b

Each link consists of a pair of link bars 24, 24,,secured to a tool holder 25. This tool holder is preferably a casting and ex ten'ds between the two members 24; 24 and is secured to the same by a bolt 26 having a nut 27 threadedly engaged thereto and'bearwhich sprocket is mnfing against the member 24. Toprovi'de for adjustment of the angularity o'fthe scraper 7 tool interlocking teeth as @1128 are provided at the ends'of the tooth holder stand inner sides of the members '24:, 24. These bolt is tightened. Toadjust the tool holderby this construction, it is merely necessary v power and functions as] to unloosen the bolt and nut sufliciently to spread the members 2a, 24: and then turn the holder 25 to give the desired adjustment. It is then secured by the retightening of the bolt.

29 indicates the scraper tool which has a working edge 30 chisel-shaped in cross secon the rail 23 which functions as a thrust sustaining surface for the scrapers.

- teeth spaces Each of the members 24, 24, of the link carries a roller as at 33 for engaging the of the sprockets over which the endless band travels.

" Iteferring to the diagrammatic illustration given in Figure 5,v A represents the irregular surface of the log and B an obstruction such as a knot, C shows a scraper contacting with this obstruction and thrown at an angle so as to accommodate it, which will of course occur in any irregularity of the logs surface.

It will be seen thatthe tension ofthe links has a tendency to hold them in the line of motion, whereas, upon striking an obfstructiom'the resistance being on one side V-shaped as shown at of the'line of motion causes a yielding due to the link being thrown upwardly as shown.

Directly the obstruction is passed the tension straightens the-link again and it is held in this position by the pull on the workng side of the belt.

Adverting to the scraper teeth, in order to obtain as great a line of contact as possible with the log, it is proposed to relieve the working edge of the teeth as shown in the drawings by making a cutting edge slightly 34. The same result may be obtained by shaping the cutting edge in various ways or by providing a number of scrapers; hence it is not intended to limit the invention in this respect.

In the operation of the invention it will be seen that as the endless band is set in mo tionthe scrapers will traverse the log for its entire length and that with the slow rotatory movement of the logthe entire bark will be eventually removed. The rail 23 supports the thrust of the scraping tools during their entire working stroke. This rail is of course suitably supported in any desirable manner. v Whereas a single rail has been shown in the preferred embodiment of the invention for cooperating with a roller disposed intermediate of the width of each link of the endless chain, itwill be manifest to those skilled in the art that a plurality of rails might be employed side-byside; for instance, together with a number of rollers attached to each link, and that other variations and modifications might be resorted to without departing from the spirit and scope of the invention.

'Having now described the preferred forms of the embodiment of the invention capable of carrying the same into practical operation, it is distinctly understood that such changes and modifications may lie-resorted to as may fairly come within the spirit and scope of the invention and claims-hereinafter following;

lVhat I claim is 1. In a rossing machine, sprockets disposed in spaced relation, a travelling belt therefor, a scraper rigidly projecting from 7 each link thereof presenting acontinuous series of working edges along one side of the belt between the sprockets for engagement axially with a side of the stick, rollers, one borne by each link in the thrust line or the scraper, and a rail extending parallel to the line of motion presenting-a thrust -sustaiuing surface for the-rollers.

2.1a a rossing machine, an endless belt composed of tool carrying links, eachlink consisting of a pair of spaced'link bars, a toolholder extending between said bars and provided with teeth for interlocking with teeth borne by the abutting faces of the bars, a bolt and nut securing the toolholder to the bars and a scraping tool affixed to said holder transversely of the link.

3. In a rossing machine, an endless link belt for operation over spaced sprocket-s, a member extending parallel to and in close proximity to the rear of the working side of the belt, said member presenting a rigid thrust sustaining surface, a scraper attached to each link of the'belt, the scraping edge thereof being located on the outside of the links and intermediate of their respective ends and a roller attached to each link on the inner side thereof and directly in the thrust line of each scraper whereby the thrust of the scraper is'not only transmitted

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