US67724A - Improvement in shingle machines - Google Patents

Description

@uiten tatrs @anni @frn EMORY B. COOK, OF NORTH BELLINGHAM, MASSACHUSETTS.

` Letters Patent No. 67.724, `claztcal August 13, 1867.

IMPROVEMENT IN SHINGLE MACHINES.

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T0 ALL PERSONS TO WHOM THESE PRESENTS SHALL COME:

Bef-it known that I, EMORY B. COOK, of North Bellingham, in `the county of Norfolk, and State'of Massachusetts, have invented a new and useful Machine for Reducing one or more Blocks of lfvood to Shingles or Boards; and I do hereby declare the same to be fullyr described in the following specification, and represented in the accompanying drawings, of' which- Figure 1 is a top view,

Figure 2 a front elevation,

Figure 3 a rear elevation, and

Figure 4 a vertical and transverse section of such machine.

In such drawings, A denotes the frame of the machine, which supports in suitable bearings an arbor, B, on one end of which a circular saw, C, is fixed; a driving-pulley, D, being also fixed on the said arbor. Around a grooved wheel, a, fixed on the arbor B, an endless crossed band, b. extends, and travels on and around another grooved wheel, c, affixed on a shaft, E. One journal of the shaft E is supported in a bearing in the end of the shorter arm of a lever, F, arranged as represented in the drawings. By moving the said lever onits fulcrum d the shaft may be moved so as to either engage or disengage a pinion, e, with a gear, f, the said pinion e boing carried by the shaft E, and the gearf being fixed on another shaft, G, which carries a pinion, g, to engage with a gear-wheel, H, iixed on one end of a shaft, z., the whole being arranged as represented in the drawings. To the gear H two series of guide-arms, I K, are fastened, they being extended from it in radial directions, and formed as exhibited in the drawings, each of the arms K being arranged immediately below two of the arms I I. Between each two ofthe guidearms I I, and duly supported in parallel grooves, it', made in them, is acarriage, L, provided with suitable appliances for fixing to it a block of wood, that is to say, it has one stationary toothed jaw, k, and one movable toothed jaw, Z. The movable jaw isa lever which turns on a fulcrum,`m, and is moved thereon by means of a hand-lever n, and a connecting-rod o. The fulcrump of the hand-lever projects from a. stationary ratchet, q, extending from the carriage L. The hand-lever is provided with a pawl, r, to engage with the teeth of the ratchet, the whole being as exhibited in the drawings. The carriage'L rests on one of the arms K, or that which is interposed between its two guidearms I I. Furthermore, the said guide-arms I I are formed with auxiliary parallel vvgrooves, s s, to receive, support, and guide two racks, tt, which extend from and are jointed to the carriage L near its two ends. .These two racks engage with one of aseries of worm-wheels, M M, which revolve freely on arbors u, projecting from the guide-arms K K, there being one of such worm-wheels to each of auch arms K. Against the side of each of such worm-wheels a ratchet, N, is fixed, and in the orbital path of movement of the ratchet, and to the base-plate.O 'of the machine, a spring-click, P, is fixed. IThe object of the saideliek is to impart to the vratchet a partial revolution while it may be in the act of passing by the click, the same causing the worm-wheelto be similarly revolved. Eachworm-wheel has three threads, or is s section of a three-threaded screw. Each of the threads may be either a lregular or an irregular helix in form. In case it isa regular helix the two racks willbe so operated by it as to feed their carriage along in continual parallelism with the face of the saw, whereby the machine would reduce the block of wood tio boards of an even thickness. By making the threads irregular helices of suitable forms the carriage may be made to advance with an intermittent vibratory motion, such as will cause the block of wood to be cnt by the saw into wedges in the form of shingles'. An edge view and a side elevation of one of the worm-wheels are represented in Figures 5 and 6, which exhibit the form and arrangement of their threads for eii`ecting-the vibration of the carriage while being advanced. When the carriage reaches the extreme of its motion inward or toward the saw, a proA jection, v, from it brings up against a spring, w, extending from the arm K, (see iig. 4.) This spring serves to return the racks into engagement with the worm-wheels after each may have passed outvof engagement therea with. When the saw-shaft is put invrevolution the saw will be revolved. The gear H and the several block* carriers, supplied with blocks to be reduced to shingles, will also be put in slow revolution, so as to cause the saw to cut in succession through the blocks. Each block, during its passage around in its orbit of revolution, will be advanced toward the plane of the saw, and will be adjusted to a proper position for the saw to again pass or cut throughit. If the threads of the worm-wheels are regular helices, boards of an even thickness will be cut from theblocks, but when the threads are irregular helices, or are bent or curved so as to cause each blocks carriage to be advanced at its ends alternately, the blocks will be reduced to thin wedges or shingles. There may be eight or any other suitable number of block-carriers in the series. When each of the blocks may have vbecome cut up into boards or shingles the remnant'ofit may be removed from thejaws of its carrier and a, fresh block be substituted, such being accomplished whlethe series of block-carriers is in revolution.

I am aware of the shingle machine described in the United States Patent No.49,228, and dated August 8,' 1865. This machine, although having'a circular saw and a rotary series of block-carriers, does not have such block-carriers operated like mine, and besides, it has a tilting-table on which leach block, preparatory to being sawed, is dropped, the jaws for holding the block being operated so as to allow it to fall on and be tipped by such table. In my machine no such tilting-table is employed, each block while'being held by the jaws lbeing properly adjusted preparatory toits contact-with the saw. The operations-and mechanisms of the twomachines are essentially di`erent,`although the machines may be productive of like results.

I ain-also' aware of the machines described in theUnited States Patents Nos. 15,756 and 19,3519, granted to George Crane. In each of these machines' 'there is no rotary series ofbloclr-holders, but'only one or two blockholding or reciprocating.carriages, cach of` such having, for adjusting the black or bolt of wood, a mechanism analogous to that employed in my machine. -I therefore make no claim to a saw] and a rotary series of blockcarriers and a tilting-table, -astconstructed, arranged, and made to operate as described and exhibited in the said Patent No. 49,228. Nor-do I claim the combination of two racks, aworm-wheel, a ratchet and a click, or its equivalent, as applied to areciprocating carriage or block-carrier, and for `advancing and adjusting a block or bolt of wood with respect to a. saw, so that a shingle may be separated fron'such block during each advance of the carriage. I have but one operative click, P, for the whole series of ratchcts, N, constituting my several mechanisms for advancing and adjust-ing theblocks while being revolved around a common axis. Consequently my mechanism for operating the. several block-carriers causes each of them to be actuated in successionby being revolved in a common orbit, and so that these ratchets may be successively carried against the single click. Consequently the single click, the rotary series of ratchets, racks` 'and worm-wheels, block-carriers, mechanism for revolving them in a common orbit, constitute a combination which, when used in connection inmanner as explained, with a circular saw, constitutes a mechanism which, involving several features or mechanisms exhibited in the said patents, yet, as a whole, contains marked and useful differences, and will operate in a much more effective manner for the production of shingles.

/ Therefore, what I claim as my invention, is-.

My improved shingle-making machine, as composed of the single click P, the rotary series of ratchets N, worm-Wheel M, racks t t, and block-carriers L, arranged together, and with a. circular saw and' its operative mechanism, and provided with mechanism for supporting and operating them, substantially as specified.

EMORY B. COOK.

Witnesses R. Hf EDDY, F. P. HALE, Jr.

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