US75678A - Henry h - Google Patents

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HENRY ""H, GRI-nner, or AUBURN, New YORK,

i Letters .Patent No. 75,678, dated March 17, 1868.

IMPROVRMENT IN smv-MILLS.

lEile Segnali maar it it that @tetten ttent'na uiting @at nf tige trae.

tro ALL weon IT MAY CONGE-RN:

Be it knownv that I, HENRY H.Y GRYIDLE, of the city of Auburn, in the county 'of Cayuga, and Stateiof New York, havelinven'ted certain new and'useful Improvements in Saw-Mills; and I hereby declare that the following'is a full, clear, and enact descri ption ther-cot, anrl'oi' the operations, thereof, reference being had to theaecompanying drawings, in which-f-A Figure l is a birdsfeye view ot'` .the saw-mill.

Figure 2 is a'side Vview of the headblock,as seen'from the front end of the carriage.

Figure 3`iepresents the machinerylfforgiving the reverse or giggingbackmotion to the carriage.

Figurei represents the slide-bar, and the springs attached thereto.

Figure 5 represents viewof the-.under side ofthe head-block, with the dogs in' position to catch between the teeth of the sliding rack.

Figure 6 represents a. side view of Figure 7 represents a that side.

the lhcad-block, as seen from the rear end of the" carriage.

rIhe nature of my inventio'nconsists, first, in placing the carriage upon-wheels made rigid with their axles,`

sidetvie-w of a sectionof the carriage, when somewhat elevated from lits support-'on and so arrangingthe axlesas that, 'when `the carriage `is moved or gig'ged back, the log will be moved or deilected u laterally fron-tithe said Wheels to any requireddistance, andlprevet 'all scratching of .the log by the saw, and.

all dullingoi the saw-teeth when gigging back second, in constructing and arranging the different parts of th'eJock-lever, so that one4 end thereof4 shall hold the friction-shaft, with its friction-pulley, and the otherlend .thereof shall hold the tightening-pulley, and so constructing the head of' said `rock-lever as to enable the operator to change the height'of'the tighteningpnlley,vand thus'iaccommodate it* to the varying leng'th` oi' the backing-belt; third, in constructing anderran'ging mechanism so as to prevent the head-blockWV from moving,

when the .automatic Asettingapparatns is in motion, while gigging back, and enabling the operator, by means of the same mechanism, to move either head-block independent of the other 5 4fourth, in constructing and arranging m'echanismjsoasat all times, when desired, thosecure the movement of the head-block towards the saw, when th'e automatic setting-apparatus is in mo'tion,{and the`lset is being-given to the log.

` In order to carry into practical operation the rst' part of" my invention, place bearings uponv the underside of the carriage which carries the,v log, to receive `the ends of the axles A. Upon eac'h'end of these axles 'I kcast a wheel, a, with a fiange upon the' inner side thereof, to control the lateral Ymovement of the carriage.

Instead of setting these axles at lright :angles with the sides of the carriage, I set them slightly diagonal'there with, the ends thereof nearest the'saw'being slightly inclined toward the rear end ofthe carriage, so that, when the carriage is moving forward with the log, the iange -upon'the inner Wheels'Will press steadily and firmlyV against the insideof the rail uponwhich that wheel is tracking, and thus keep the carriage steadily in its place while' the saw is in operation;. but' as soon as the movement of the carriage is reversed in ggging back, this diagonal arrangement of the axles 4causes the carriage to deti'ecti'rom the saw until the anges of the outer wheels are caused to press against the inside of the rail upon which they are tracking, and thus the log is deflected from-thevsaw, so that, when giggingback, the Saw'will not touch the side of the log, and all scratching of the loganddnlling of the saw-teeth when 'giggingbackare avoided. i i

In order to carry intopraotcal operation the second part of` my'invention, I constructthe rock-lever B with a swivel box,l hung by set-'screws upon the under side of the end thereof, which supports the friction-shaft CZ. I supportlsaid rock-lever upon the frame' in the usual manner. Upon the other end, c, of this rock-lever, I'attac'h a tightening-pulley, b, the stud whereof` passesV through this end, c, oi' the rock-lever, and is fastened thereto by a screw and nut.` In order to permitrthis tightening-pulley b to be adjhsted, so as toaccommodate it to the varying lengthu of the belt, I make the end, c, of my rock-lever, in the form of a slot, 1) so that the stud of the tightening-pulley maybe let down or raised up at the pleasure of the operator, and he can thus at any time'vary the height towhichthe tightening-pulley can be raised, Vand thereby accommodate 'this pulley to the varying lengthof the belt, and prevent the necessity of lengthening or shortening the belt. i A In order to carry into-practical operation the third part of my invention, I construct myh'eattblock with a-ratcbet-wheel, q, and pinionfa, upon the sam? `shaft, which pinion engages with the racka, said rack being attached ,rigidly to the rear side of the beam upon which the head-block is supported. Upon the frontside ef the head-block I attach the hand-lever n, and to that I attach the pawl @which may lie-made to engagewith the teeth of the ratchet-wheel g,^or may be detached therefrom at pleasure. To the sidev of this 'hand-lever n I attach the spring o, which, by its pressure upon the pawl p, keeps it in its Aplace when it is Vintended that it should engage with the teeth of 'the said ratchet-wheel q.

The effect and operation of this machinery and its arrangementare as follows: When the automatic settingapparatus is in motion, as the carriage is gigged back, the pawl p engages with the teeth of theratchet-whe'el q, and prevents that wheel from turning, and thus preventing the head-block from' being moved backwards.

By this same mechanism, as thus arranged, either head-block may be'moved forward, by the use of the hand-lever n, independent of the other, and this operation is performed as follows: The paw] p being in its-l place, engaged with the teeth of the ratchet-wheel q, and being held in its place by the spring -o, when the handlever is moved from the saw, it causes the pawl p lto press against and turn the ratchet-wheel q, and therefore the pinion u engages with the rack z, which being xed rigidly to the beam upon which the head-block` slides, the head-block is movedtoward the saw, and thus' the operator may at any time set 4the log at either end, independent of the other. y l y In order to carry into practical operation the fourth part of my invention, I entend the front side of my head-block downwards, so as to admit of placing therein the dogs t. v {In-a full-sized-headblo'ck four. are generally used.) I cut out pieces `from said extended portion, so asto admit these dogs, and allow them sudicient room to play easily therein. v I then insert therein the dogs t, hung upon a pin inserted through them, forward of the centre thereof. Upon the front side of the beam upon'which the head-bl`ock is supported, I place a sliding rack, Z, with teeth upon the outer Vface thereof, -the centre of each tooth being lone-fourth of'an inch from the centre of the tooth next thereto.' Under the centre of. this slide rack Z, and attached rigidly thereto, I place an auxiliary rack, with seven teeth thereon, to be engaged with the segment-pinion c. Uponthe end leveror arm, which is moved by the automatic settingapparatus, I attach a 'segment-pinion, k, which engages with said auxiliary rack. Over the dogs t I place the slide-bar r, and iipon'this slide-bar are rigidly attached thesprings s, corresponding in number with 4the dogs t intended to be used, andzcach so located as when the slide-bar r is moved to its fullest extent towards the saw, the springs thereto attached will eachpress'against that vpart of .the dog withwhich it comes in contact, and which it is intended to govern, so as to press'its dog awa-y from the sliding rack Z, and thus prevent it from engaging therewith. But when said slide-bar is 'movedto its furthest extent in the opposite direction, the springs thereto attached will each press-against that part of the dog with which it comes in contact, so 'as to press the end of its dog against said slide-rack Z, -and thus permit the 'end thereof to fall between the teeth upon said rack Z; but I so locate these dogs t that no' two of them shall ever be engaged between the teeth of the slide-rack Zat thesame time, and thereby rendering it certain lthat said slide-bar Z can never be moved for a. greater distance than the one-sixteenth of one inch without letting -the end of one of these dogs pass between the teeth upon said bar, unless when said dogs are pressedl back-from said slide-bar. p o

The operation of this mechanism, as thus arranged, is as follows: When the automatic setting-apparatus is in motion, as the. carriage is moved forward, the end lever or-arm, to which the segment-pinion 7c is attached,

is moved towards the saw, and its teeth engage with the teeth of the auxiliary rack attached to the under side of the slide-rack Z, and move said slide-rack Z towards the saw;l and if one o i these dogs tis at the same time engaged between the teeth upon the said slide-rack l, the head-block must necessarilyv bemoved to the same Aextent as the slide-rack Z; but if the said dogs t shall all be disengaged from seidslide-rack l, the head-block will' remain unmoved. When't becomes necessary'to' move the head-block from the saw, the' pzwl p is disengaged from the ratchet-wheel q, the slide-bar r is moved tothe full extentv toward the saw, and the dogs t'thus prevented from engaging between the teeth of the slide-rack Z, and 'hence the head-block will then be free to be moved in either direction.

Fora description ofthe other parts of my saw-mill,'reterence is hereby made to the specifcationsand drawings annexed to Letters Patent granted toine for improvementsin head-blocks for saw-mills bearing date the first day of May, 1866, and numbered 54,330.

Having thus described the component'parts of' my invention and their several functions, and also the mode of operation and eiect theieof, what I claim therein as new, and desire to secure by Letters Patent, is-

1. l.he combination'of the lever f, shaft E, and its connecting-links, with the pivoted arm B, carryingin 'a slot the adjustable box, with the friction-shaft d, andthe adjustable stud of the tightening-pulley Iz, all cou- -structed and operating substantially as described. I

2. The combination of the slide-bar r, with its springs, s, and the dogs t, with theslide=rack Z, substan- -tially as and for the purpose described.

3. The combination of the segment-pinion It, upon theend of'the leveror arm of the automatic setting- "apparatus, with the auxiliary. rack under the sliding rack Z, substantiallyas and for the purpose described.

' HENRY n. GRIDLEY.

Witnesses:

D. WRIGHT, W. P. WRIGHT.

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