US94668A - Improvement in sawingmmachine - Google Patents

Description

acca sms @tutti @twine HIRAM THOMPSON, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO RICHARD BALL AND E. P. HALSTED, OF SAME PLACE.

Letters Patent No. 94,668, dated September 7 1,869.

The `Sehieclrlle referred to in these Letters Patent and maling part of the same.

Know all men by these presents.-

' That I, HmAM THOMPSON, of the city and county of Worcester, and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Resawing-Maehines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drzwings,` forming a part of this specification, in which- Figure l represents a plan view of my improved resawing-mach ine 1 Figure 2 represents a view of the right-hand side of same; i

Figure represents a front view;

Figure 4 represents a section on line A B, fig. 3;

Figure 5 represents a central vertical section of one of the feed-rolls; and

Figure 6 represents a section of the devices for changing the position of the feed-rolls, takenon line C, fig. l.

To enable those skilled in the art to which my invention belongs, to make and use the same, I will proceed to describe it more in detail.

The nature of my invention consists- First, in a peculiarly-constructed frame for supporting the feed-rolls, and the gearing by which they are operated.

Second, in the combination .and relative arrangement of a series of' feed-rolls with each other, and their gear-shafts, substantially as hereafter explained.

Third, in the combination, with the upper ends of the feed-rolls, of a forked roll-supporting adjustable frame, provided with a scale, as hereafter explained.

Fourth, in the combination, with the frames which support the, feed-rolls, of adjusting-mechanism, as hereafter explained.

Fifth, in the combination of devices for adjusting the saw and its arbor, as hereafter set forth.

Sixth, in the combination, with the saw, of'a peculiarly-constructed shield and dust-pipe, as hereafter described, and in the peculiar devices for supporting the arbor of the saw. A

Seventh, in a resawing-machine, the parts of which are combined together, and arranged to be operated substantially as shown and hereafter described.

In the drawings- The part indicated by letter A is the main frame of the machine, which may be made of any suitable material.

Upon the forward part of the frame A, is mounted a carriage, B, which may be moved laterally upon said frame, ways a'being'provided for its support and guidance, while a screw, b, is arranged at one side, for moving and adjusting it to any desired position, where it can be securely retained by means of the clampscrews c, that pass up through slottedfianges formed on the inside ofthe main frame A, and screw into the -under side of the carriage B. Y Upon' the carriage B, are arranged sliding frameof the parts, or be taken out, when necessary to re-V move the plates or parts of the machine connected thereto, for repairs or other purposes.

On the top of slide-plates D,.arc cast standards E,

and upon their under sides, hangers F, for supporting the bearings of the feed-rolls.

The bearings G, at the top of the rollsare pivoted to the curved forks H by bolts l, that pass through the ends of the forks, with their points resting in depressions formed in the sides of the bearings G, which are thereby allowed to conform automatically to the inclination of the rolls C, when the latter are placed in an oblique position'.

The forks H are supportedjupon the curved flanged tops E of the standards E, as shown inv thedrawings, and may be adjusted back and forth thereon, to give the rolls C the desired degreeof inclination, by means of t-he adjusting-screws g, arranged in the flanges h and i.

The forks are guided by projections 1, raised upon the tops of the standards, which t into slots 2, formed in the forks H, as shown in fig. 1 of th'e drawings.

Clamp-screws k are arranged in the projections l, by means of which the forks can vbe held securely in any position; and a scale is cut upon or combined with one side of the forks H, which,'i n connection with the index-points 3, fastened to the sides of the flanged -tops E', greatly facilitate the accurate and proper adjustment of the parts.

The rolls C are constructed as shown in fig. 5, the lower part Kof their shafts being connected to the upper part L by a universal joint at the lower end of the roll C. v

The joint is made by forming a ball, m, on the lower end of the upperpart or roll-shaft L, and a socket inthe top of the lower part or gear-shaft'K, into'which the ball is inserted, and retained 'by a pin, a, that passes through from side to side of theshatt K, the hole in the ball m, through which the pin passes, being made larger at the sides than at the centre, to allow ofthe required inclination.

The pin n is fitted closely in the socket It, whereby l the socket isrendered sufiiciently tightto contain the oil for lubricating the joint.

Thev lower part K of the shaft, to which the operating-gears M are attached, is-held in an upright position in the bearings N, fixed te the hangers F, said bearings being made to accommodate the jour- `nais of a pair of rolls, each, as well as the journal of the intermediate gear O, from which the gears M and feed-rolls G derive their motion, which is transmitted through them from the shaft P, they being connected thereto by the bevelled gears Q andR', one gear, Q, beingfsec'ulalto the intermediate gear O, and the other gear, R, to the shaft P.

The hubs of gears R are recessed, to receive the bearings S, formed by the prolongation of the hangers F, for the-"purpose of sliding tl ze gears along the shaft P, to keep them in the correct relative position, as regardsl gears Q, when the `feeding-rolls are moved to and lroinV each other.

Grooves 0 are formed in the shaft P, to which the gears are secured by means of splines or screws.

The device for moving the feed-rolls to and from each other consists of a horizontal shaft, T, which extends from the front of the machine backward, be-

y neath the ri ght-han d lslide-plate D, nearly to its centre,

as shown in dottedlines,.tig'. '1. v

Y It is supported by bearings U, attached to the un- "by which the latter is held in gear and guided.

A gear, q, is fixed to the front end of shaft T, which is operatedon by a dog, s, pivot-ed in the fork of the balance-leverY, which lever is fulcrumed on the shaft T at each side ofthe gear q, and extends across at the front side of the machine, as fully indicated in the drawings.

A weight, Z, is suspended from the lever Y, which l gives the required pressure on the feed-rolls C.

Dog s is so formed that its weight causes it to engage' the cogs of the gear q with its lower arm, which operation tends to press the feed-rolls toward each other; but by raising the rear part thereof, it may be made to engage the cogs with its upper arm, which will move the rolls apart.

' Anf arm, t, projects from the frame A, at the left side of the machine, upon which the end Vof lever Y rests, to prevent it from falling too low.l

When' it is desirous to operate but a single pair of the feed-rolls, a stop-piece, A,secured to carriage B at it its right-'hand rear corner,'may be swung forward, and the set-'screw c screwed against the edge of the right-hand slide-plate D, which is thereby prevented from moving any further outward. Then, by removing the screw 4, the-rackW is allowed to move along the groove in said plate without operating'it, while at vthe same time the opposite pair is movedas usual.

Thesaw-table B' extends the length of the machine,

and is screwed or boltedto the front and rear transoms ofthe main frame A. One of its sides is arranged to' swing up, to facilitate the removal of the saw.

The movable `side is pivoted at its rear end by the Ascrew or bolt 5, and secured at its front end by the bolt or screw 6, as shown in fig. '4.

,The arbor G ofthe saw D is supported` andtnrns in bearings O1 and O, united by a curved frame-piece, P. l

Said bearings can be adjusted forward or back, as desired, they beingsupported on ways F', one of which is on the main frame A, and the other'on Ythe lo'ngitndinalr'central frame G', the lattervbeing fitted into a groove formed inthe bottom of the arbor-bearing. O'Z, while the former rests on a planed surface under the bearing O1.

It will be seen that by the above described construction of the parts, that when the rear end of the central frame G' is swung either v. to the right or left, to adjust the saw on a line with the feed-rolls, that the grooved bearing O2 will. be retained in its relative position as respects the frame G', while the bearing O1 will slidel laterally upon the way F', thus rendering the -adjustment ofthe sawvery easy and perfect, while the parts are not liable to derangement.

Slots 11 are formed in 'the frames parallel to the ways F, in which are arranged clamping-bolts 12, for sccuri-ngthe arbor-bearings Ol and O2 in the desired positions.

The saw-arbor is operated by a belt-from vthe drivin gshaft, suitable pulleys being arranged for that purpose.

The shaft P, which'operates the feedingdevices, is driven'from the saw-arbor by belts H and K', running from opposite ends of the shaft I', as fully indicated in the drawings. '1

The longitudinal central frame G' has'an adjustingthe saw can be adjusted feedrolls. l The vlower half of the saw is enclosed in a case, M', for carrying oii the saw-dust, which is 'driven .out through the tube N by the j current of air raised by the' saw.

The case M is formed in two parts, said parts being part.

By this method of construction, thel case may be readily taken apart, to iin'ilitate'the removal of the saw'D. from its arbor C', it being only necessary to take out the bolt 6, and raise or swing up the movable when, by removing' the nut 10, the saw D is freed from the machine without disturbing any other parts. Thus it will be seen that'the saw may be changed for another of' different size, with but little trouble in comparison to other methods.

By the use of two pairs of feed-rolls, the boards are passed through the machine in a much more even and regular manner than with a single pair ot rolls, asgthe rolls engage the end of oneA board before releasing the one in advance, thereby obviating the necessity of crowding the boards between the rolls.

Again, by the use of my weighting-device, an equal pressure is preserved on each pair of rolls when both are in gear, so that the boards are sawed accurately in thec entre,'while if but one pair is ingear, the same amount of pressure is retained, without any alteration ofthe weights.

cess of manufacture is greatly facilitated, and at the same time a much more substantial machine is' produced than` would be the case were these parts cast there'isgreat:liabilityV ofthe parts becoming loose and displaced, or out .ofadj ustment. But with my method a rm and stiff frame produced.

It will be observed that, by the use of the laterally- By this arrangement, the machine can be easily adscrew, 7, arranged at its rear end, by means of which.

in perfect alignment with the held together by the hooks 8, castA upon one of the. parts, which hocken to flanges 9, cast lupon the other side of the table, and lift otE the sideot' the-case M', p

It will be seen that by casting the slide-plates D, Astandards E, and hangers Fin a single piece, theproseparately and bolted together, for when so constructed,

of construction, suoli displacement is impossible, and

adjustable carriage B, the whole ofthe feeding-mechanjusted to saw more or less from one side-of the stick f of'tirnber without changing or disturbing the position ofthe saw, or without even stopping it.

,This is a great advantage, as will readily be seen by those-skilled in the art to which my invention belongs.

Having described my improved resawing-machine,

What I claim as new, and of my invention, and desire to secure by Letters'latent, is

1. The combination, with the feed-rolls O C C G and roll-shafts L, of the gear-shafts K and pins y, passing through both -said shafts, substantially as shown inthe drawings, and herein described.

2. The combination, with the upper ends of the feed-rolls C C, of theroll-supporting adjustable frame H, forked so asto holdeach pair of rolls, substantially as and for the purposes set forth.

3. The combination of the slotted forked frame H.

withtheanged standard E, provided with the pro- `lection 1, substantially vas land for the purposes set orth.

4. The combination, with the adjustable roll-supporting frame H, of a scale and index, substantially as`and for the purposes set fortln 5. The combination, with the slotted forked frame lH and anged standard E, of the adjusting-screw g,

substantially as shown and described.

6. The combination, with the sliding frame-plates D D, of the rack-bars W X, cog-wheel V, and shaft T,'the parts being constructed and arranged in rela# tion to each other, substantially as shownV aud described. g

7. The combination, with the rack 1V and slideplate D, of the screw 4, ysubstantially as and for the purposes set forth. l8. The combination, with the adjustable carriage B, of the sliding' frame-plates D D, connected with and held upon vsaid carriage, substantially'as shown and described.

9. rlhe combination, with the adjustable carriage B, of the clamping-screws c c and adjusting-screw b, substantially as and for the purposes set forth.

10. VThe combination, with the sliding frame-plate D, Aof a swinging stop-device, A fr, as shown and described.

11. 'lhe combinatiomwith the saw D', ofthe divided shield M' and dust-pipe N', when constructed substantially as and Vfor the purposes set forth.

12. The combination, with the main frame A and laterally-moving frame G', pivoted and adjusted as described, of the gifooved bearing Oi, bearing $1, and elevated ways F', said hearings being capable o a 1ong'itudinal adj ustment, as shown and described.

13. A machineA for resawing lumber, the parts of, which are constructed, arranged, and combined together, substantially as show'n and described.

Witnesses: HIRAM THOMPSON.

THos. H. DODGE, ALBERT E. PEIRCE.

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