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THOMAS BLANGHARD,l on New YORK, u Y.
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- Speccation of Letters Eatent N20.l 6, dated August 10, 18,36.
To all whom it may concern Be it known that l', THOMAS BLANCHARD, of the city, county, and State of New York, have made certain new and useful improve ments in machinery for formingparts of made tackle-blocks, or, as they are technically called, plank-blocks, Vfor ships and other purposes in a better manner than has been done by hand or in any other way, and
that the said improvement and the machinery by which the same are ed'ected and the method of constructing and using the same are fully and correctly set' forth in the following specification and inthe drawing anneXed to and making a part of this specification, 'whereiny The principal figure represents the ma chine I use for the purpose of making the end pieces of plank, or made blocks, and the several parts thereof are as follows: A, is a lower bearer. B, is, an upright standard post in the bearer A. C', is a small post in front to support D, D, two bearing blocks connected at one end to B, and E, is a small post behind serving as a fulcrum post. These are the fixed parts represented as of wood, but may be made of iron, on which the working parts of the machine are mounted.
a, a, are two lower, al, a1 are twoupper metal slide ways with slots through which they are screwed, and adjusted into the standard B, by screw bolts l, 1, l, 1. These slide ways may if 'so chosen be made in one piece on each side. The side set screws 2, 2, 2, 2, give, and retain the lateral position of these ways as wanted.
b, is a balance lever one end sliding in a mortise in the standard B, and having the fulcrum on a bolt in the part At thc back end of this lever is the weight F, and the other end coming through a slot in the side piece e, in front of the post, B, the joint c, connects the lever to the lower end of the rod al, and this connecting rod is again jointed to the middle part of the lower slide piece e, which has a shoulder flanch, or step near the middle to receive the stop of the lower carrier block f, with the lower center bracket g, upon it. These are screwed to the slide piece by holding screws 3, 3, and adjusted by set screws 4, 4. Above in the slide way the upper slide piece el, is set in reverse with the lower slide e, and has the corner block f1, and center bracket, g1, on the lower bracket, and held, and ady justed by screws 81, and set screws 41, inthe same way, and on the part corresponding g to the joint on the lower slides is the eye 7L, E and to this is fastened the cord c', over the Lslot in the slide above this is the vertical 5 guiderod lo, held by bolts through the slot, e j and having 'at top a return end projecting l out in front at right angles."
j In the bearings Z, Z, ismountedf the small 1 winch m, moved by the small crank handle n a. rThe cord z', goesround this winch, andl i up toward the guide rod lo, when the cord is fastened through the eye of the adjusting l screw eye bolt O, so that the slide f1, may be moved up, ordown by turning the crank handle @,but the same object `may be obtained by a rack, and pinion, or a small chain in place of a cord. f Upon bearings p, p, in the blocks D, D, the revolving cut-ter shaftV g, is mountedkmade square between the bearings p, p, having on it two pairs of straight edged cutters 1, "1*, which edges are at rightjangles to the cutter shaft center with the cutting edges inward facing each other, and fitted to stand in cutting at the angle with a. carpenters plane iron having slots in their stocks to allow of adjustment, and fixture by screws going through the slots into the stock, brackets, and bearings on the shaft of, and between the stock brackets of these two cutters, on theother flat sides of the shaft g, arev fixed the straight edged cutter S, and the round edged cutter z5, also held by screws going throughslots to allow of their adjustment.V
The drum, or pulley V, gives motion tothe cutters by a belt, or band to any rst mover,
and the use of this machine as thus described is to shape the pieces forming the ends of the mortices in made, or plank blocks in the following manner. If the workman intends to form the hollow, or
mortise in the block, he withdraws the -4 round edged cutter from operation, and
advances the straight edged one. In either Y case adjusting the right angled cutters 1", r,
to strip the sides of the piece of wood eX- actly, to the thickness required by the mortise of the intended block before he begins to work the machine, then a piece cut nearly to the length required is placed endwise upon the lower center bracket g, where the lateral position is adjusted by the gage piece in working by a screw through a slot into the gage bracket w. The workman now turns the small winch m, by the crank handle n, so that the upper center bracket g1, comes down, and holds the piece of wood firmly between the two brackets, and the workman continuing to turn the Winch overcomes the resistance of the balance lever b, and the weight F, and forces the lower slide piece e, and ts'fixtures downward so as to carry theV piece of wood entirely below the operation of the revolving cutters. By this means the wood in the passage from the upper to the lower is entirelystripped of all superfluous material on-three sides, and reduced exactly to the shape, and size which is required in setting up the block about to be made. The workman reversing the operation at the winch m, brings the piece up again, and removes it, leaving the space between the center brackets open for other pieces to be successively formed in a similar manner. And I the said THOMAS BLANCH- ARD do hereby claim as my invention- The applica-tion of rotary or revolving cutters acting at right angles to the shaft to which they are aiiiXed, and set at a cutting angle similar to that of a carpenters plane iron so as to form a clean drawing stroke with the grain of the wood to be operated on together with the round edged, and straight edged cutters parallel to the sha-ft, as the same are herein. substantially set forth, and described as being applied by me to the purpose of thereby forming at one operation three'sides of the end pieces for made tackle blocks of any required size. And the adaptation, and combination of all the'parts, aforesaid in any manner substantially the same as that above described, and so as to produce the aforesaid results.
In testimony'whereofl have hereunto set my hand Aug. 11th, 1885.
THOS. BLANCHARD. wWitnesses:
JOHN N. TAYLOR, J-As. H. SANFORD.