US60847A - beard - Google Patents

Description

ASA M. BEARD, OF HILLSBOROUGH BRIDGE, NEW HAMPSHIRE, ASSIGNOR TO HIMSELF AND SOLOMON MCNIEL, OF SAME PLACE.'

Letters Patent No. 60,847, dated January 1, 1867.

IMPROVEMENT IN HEAD BLOCKS I'OR SAW-MILLS.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, A. M. BEARD, of Hillsborough Bridge, Hillsborough county, and State of New Hampshire, have inventeda new and improved Log Carriage for Saw Mills; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to .make and use l the same, reference being had to the accompanying drawing, forming part of this specification, in 'which-Q .Figure 1, sheet 1, is a front elevation of my improved log carriage; and

Figure 2 is a top plan of the same.

Figure 3, sheet 2, is a cross-section, taken in the line a: ai', iig. 2.

Figuresl, 5, 6, and 7 are detail views of important parts.

Similar letters of reference in the di'erent figures indicate corresponding parts.v

- This invention consists in certain new and useful improvements in log carriages wherebylthe log' is secured and handled in an easy and rapid manner; and also in an index of novel construction, which determines without calculation where the saw should enter the log in making the first cut, saving time and labor, as hereinafter explained. A

A A'aa a, gs. 1, 2, and 3, is the carriage, and B is the rest, sliding laterally thereon; the rest, B, has two arms., b b, iig. 2, projecting from its rear side, and these arms carry a shaft, C, tig. 2, whichA has a pinion, c, upon each end.A These pinions, c, engage each with a mortise rack, a2, formed in the top of the angular bedpieces or slides a and by means of the said mortise racks a2 a2, pinions ,e c, and shaft C, the` rest, B, is carried back'and forthon the slides, a a. The shaft, C, is operated by'a ratchet-lever, D, which has a double pawl or ratchet, d, which engages `with a cog-wheel, E, the said cog-wheel E acting as a 4ratchet-wheel for the leve'r and pawl Dd, and also as a cog-wheel, upon which a pinion, e, (tig. 1,) may act to run the rest B back when ,a lop, is cut up and when another-one is to -be received on the carriage. The pinion e is operated by a hand crank, f, on the shaft F. By means of this crank and pinion f e the rest E is run back in less time'than it can be done with the ratchet-lever D, although the said lever D has facilities for moving the rest Bbackward as well as forward, which is convenient in setting the Ylog properly before the saw. The rest B- is secured in place by a hook-shaped pawl, g, the said pawl being pivoted to the rest at g. The double ratchet or pawl d is suspended on the lever D (iig. 6) by a pivot, It, in its centre; a spring-lever, I, is also pivoted to the lever D by a-pivot, z'. The lower end of 'this lever I enters a notch in the upper side of the double ratchet, and `its upper end-is bifurcated, and embraces'a cam-wheel, G, which is pivoted to the top of the lever D, the said cam-wheel G having a handle, H, (fig. 1,) by which it may be turned; and as the cam G (iig. is thrown to either side, the lever Itilts the donbleratchet d, so that one of its ends is loweredinto connection or engagement, and the opposite end Yis raised out of action; and by these means the pawl UZ is readily controlled, and made to give either a. backward or forward 'movement of the rest, as desired. Outside ofithe cam Gr is a second cam, j, (iig. 1,) whichis attached to g and moves therewith; and this cam or eccentric j raises and` lowers or operates a connecting-rod, J,which takes hold of the pawl g by a hook on its lower end; and as the handle H and eccentric or cam G are turned into position for running back the carriage, the eccentric j and rod .I elevate the hooked pawl g out of action, and the rest is free to run back.. a: (tig. is a spring, which presses the eccentric or cam Gr against thc lever D, and holdstheeams in position by friction. The throw of the lever D is regulated so as to give any required distance of movement to the restB necessary for board sawing-'by a filled stop,- k, andan adjustable stop, K, (fig 2.) The adjustable stop K slides on a'graduated arm, N, and is secured in position by a sliding pawl, l, (iig. 5,) which engages withn the notches n (iig. 2) in one edge of the arm N, the pawl Zbeing held into the notches by a spring, L, (fig. 5,) and is operated by a knob,m. The arm N is graduated on its upper face, and marked with figures, so that it can be seen at a glance where to set the adju-stable stop K to give the proper space between the stops for the lever D to move in andgive theI desired throw for the requisite thickness of boards. The rest B is provided with three'stands O M O, (figs. 1 and 3,) the centre one, M, being fixed, -and the end stands, O O, beingmovable, so" that either of them may be pushed ont lfor 'carrying the-small end of a tapering log into line with the saw.. These movable stands O slidein guidesjo p, (figs. 1 and-2,) and are actuated by ratchet-levers R R, (tig. 1,) ratchet-wheels r r, (iig. 2,) shafts Q Q, and pinions a s, which are indicated by dott'ed lines S S in iig. 1, the said pinions s 8 engaging each with a toothed rack on the bottom of the horizontal part O of the stands 0. Thesestands 0 operate independentlyrof each other, one ofthe ratehet-leversR movingone of them and the other vlever R the other. The ratchet-levers R for operatingl the stands have the double ratchets,` and also the hooked pawl, and all of the devices for controlling them,the same as the rest-moving lever D, already explained. The levers R are hield in any position in which they are placed by pawls 11', (tig. 3,) which engage with va rack, l2. The stands O'are each-provided with-.a lroller, q, which is pivoted near its top and so as to project slightly upward beyond the top of the stand, to prevent wide boards, when edging them on topoia log, fro'rncatching on the top of the said stands asfthey are'removed. The end stands O O have dogs or spurs T T, (figs. 2 and 3,) which 'slide in guides attached to the stands, and they are driven into the log to secure it in position. The bar or body portions of these dogs are notched, and a pawl, Z, (iig. 3,) is pivotedto each stand in such a position that when the dogs are driven the said pawls engage fwith the notches in the bar and prevent them from working out of the log The pawLZis elbow-shaped, and

it is suspended, to the stand Q by a pivot in itscentre, in such a manner that 'when,the pawl end is down, as shown, thenthe weight of the'pawl, as a whole, is principally on that'side of the pivot but when 'the pawl is thrown up, it is held there by'the preponderance of weight being thrown behind the suspending pivot, the upper or rear arm of the pawl acting as acounterbalance, so that the pawl-end is held up after only a slight elevation or movement. A screw-dog, vU, (figs. 1, 2, and 7,) is also provided for 1`oldiri'g the log snug in posh` tion. This dogis mounted in a frame, Y, which tits on `to the rest B, (fig. 7,) and 'is thrown inta-the vlog by depressing the lever Y, 'which forces th'e screw-spur U in contact with the log, and then the screw is bedded in the log by turning its crank-handle u. The elbow-lever V is pivoted at v, and its'short arm Vconnects with dog by occupying the 'groove w in the said dog or spur U. When not in use the spur is held back by a spring, W, which holds up'the lever V.' The log-rest or slide af* (tig.4 2) has on one side and at Iits rear end a toothed rack, 1; this rack is iixcd.- The rest B carries in its rear a vertical shaft, 5, (iig. 3,) whichv has on its lower end a pinion, 2, (iig. 2,) which engages with the rack 1. To the upper end of the vertical shaft .5 isxed a'disk, 4,' which has its periphery graduated and marked o with figures; land above'this disk is a second one, 3,'whic`hI is loose on the shaft 5, andv is graduated like the iixed disk 4, only it has three graduations, ali-ranged one above the other, and each scale or graduation being divided oil', so that the spaces between the marks are of diierent lengths. l 6 and 7 (g. l) are index hands, or pointers, the lower one, 7, pointing for the lower disk, and the upper one, 6, pointing for the loose npp'er disk. The upper pointer 6 is adjustable' on the standard 8.. The sleeve of this pointer ttin g over'the standard has a nib, which engages with one of a series of notches, 9, in one edge of the standard 8; and this nib is held into the notch in which it is i placed by a' spring, 10. .This adjustable pointer 6 is adjusted on the' standard 8 so as to point to the particular graduation of the vseries von disk 3.which is being used. As the rest B is being moved the fixed rack 1 (iig. 2) turns the shaft -5 (iig. 3) and the graduated disks 4 and 3. The fixed disk 4 is-spaced oi, so as to show at all times the distance between the rest B and the saw in inches. A When sawing a. log into boards, and when a plank or timber of a certain thickness is to be left next to therest B, then the adjustable index 3 is used, as follows A point in the `board column en the index 3 is turned directly above thevv figure on index 4, which represents in'inehes the thickness of the plank or timber to be left, and then the saw is started into the log by the said board column on the indexv 3; and this brings the saw out correctly at the requiredpoint for leaving the desired size of timber after the vfirst part of the log has been cutup into boards. Therequired thickness of the boards in this latter case determines which of the three graduations onl index 3 is to be used. If the lower graduation on 3 is .marked for inch and a quarterboards, and this is the thickness of boards required from thevfirst partof the log, and if the piece of timber to be left is to beiive inches in thickness, then any of the inch and a quarter marks in the lower graduation of 3' is turned opposite to the figure 5 on the lower index, vand the saw is started on the outside of thelog by the lower graduation onv3, and the log is cut up into vthe"req`uired stuff; and by these means the log is brought tothe right point before the saw at once and without calculation, thus. making an important saving in time and labor. l l v Having thus described my invention, what.' I claim as new, and desire to secure by Letters Patent, is-.-

l. I claim the rotating index 4, supported on and carried4 by the log rest B, and -operated "by a xed rack, l, and pinion 2, substantially as and for the purpose herein specified.

2. I claim, in connection with the graduated indicating disk or indexy 4, pinion2, rack l, and log rest or head block B, an adjustable secondary index or, graduated disk, 3, arranged andvoperatingl substantially as and for the purpose explained.

3. I claim a hand lever, D, yhaving a double pawl, d, which is controlledy by an eccentric, G, and sub-lever, I, pivoted thereto, and having a second eccentric or cam, y', and rod J, for lifting the head block or-rest pawl, g, in connection with a spur-wheel, E, pinions'al c, racks a, and'rest B, as and for the purpose shown'an'd explained.

.4. I claim the balanced elbowls'haped pawls Z, in connection' with the stands O and sliding dogs T, as and for the purpose described.

5. I claim the rollers g, pivoted to the tops of the stands l), Aas and `for the purpose set forth.

6. I claim the stands D, in combination with the movable rest B, when 'the said standsv are adjustable on the said rest B, substantially as and for the purpose set forth.

` ASA M. BEARD.

Witnesses:

J. O. TEELE, WM. P. GREENLEAF.

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