US799692A - Sawmill-dog. - Google Patents

Description

No. 799,692. PATENTBD SEPT. 19, 1995. W. H. TROUT.

SAWMILL D09.

APPLIOATION FILED NOV. 21, 1904.

' 4 SHEETS-SHEET 1.

@99m/Wagga.

N0. 799,692. vPATBNTED SEPT. 19, 1905.

W. H. TROUT.

SAWMILL DOG.

APPLIOATION FILEDNOV. Z1, 1904.

4 SHEETS-SHEET Z.

J MMM No. 799,692, l lPATENTED SEPT. 19, 1905.

W. H. TROUT. I

SAWMILL DOG.k

APPLICATION FILED NOV. Z1, 1904.

4 SHEETS-SHEET 3.

E "fnnnunnnnnnn Nos-799,692. l PATENTED SEPT. 19, 1905. 4

W.- H. TROUT.

` ,y SAWMILL DOG. APPLIOATION FILED Nomzl, 1904.

4 SHEETS-SHEET 4.

UNITED sTATns f PATENT OFFICE.

Specicaton of Letters Patent.

Patented Sept. 19, 1905.

Application filed November 21, 1904. Serial No. 233,578-

1'0 @ZZ whom t may concern:

Be it known that I, WILLIAM H. TROUT, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of `Wisconsin, have invented certain new and useful Improvements in Sawmill-Dogs, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

This invention relates to that type of sawmill-dogs in which the dogs are movable bodily independently of the projection and retroaction of their teeth forward and backward with relation to the working faces of the knees in order to carry the dogs into and out of working position as required or to adjust them in different positions with reference to the knees for dierent kinds of work. Its main objects are to simplify and facilitate the adjustment and operation of this class of dogs; to save time and labor; to more elifectively engage and securely hold large, heavy, or crooked logs; to avoid injury to machinery and operatives by accidentally leaving the dogs in position to run iiito the saws; to adapt a dog of this kind for use by itselfl for general purposes or in connection with the usual multiple-tooth dogs on the knees for special purposes, such as holding large and heavy or crooked logs while the rst few cuts and turns are made and dogging sector-shaped pieces of timber for quarter-sawing, and generally to improve the construction and operation of dogs of this class.

It consists in certain novel features of construction and in the peculiar arrangement and combinations of parts hereinafter particularly described, and pointed out in the claims.

In the accompanying'drawings like characters designate the same parts in the several figures.

Figure l is a side elevation and vertical section on the line 1 l, Fig. 3, of a sawmill-dog embodying my invention and illustrating its use for quarter-sawing. Fig. 2 is a side elevation of the dog, illustrating its use with a large log. Fig. 3 is a front elevation of the dog, certain parts being broken away. Fig. 4 is a horizontal section on the line 4 4, Fig. 2. Fig. 5 is a similar section on the line 5 5, Fig. l, and Fig. 6 is a detached view of the auxiliary dog shown in Figs. l and 3 in connetion with the upper dog for quarter-sawing.

A is a standard, which may be conveniently made of pipe-sections with two parallel legs a and Z2, connected at their upper ends. The

leg b is hinged or pivoted by boxes c c to the knee B of the associated head-block parallel with the working face of the knee. -On the leg a of the standard is mounted a verticallymovable lower dog consisting of a head or sleeve D, provided with two teeth d CZ, suitably spaced and arranged to engage with the rounding surface of a log, as shown in Fig. 2.

An open rack E, attached at its lower end to the head or sleeve D, extends upwardly therefrom on the front side of the stan'dard and is guided at its upper end on the leg a by a sleeve or collar. Another dog, consisting of a head or sleeve F and provided with two teeth f, is mounted and movable up and down on the leg a of said standard either with or independently of the lower dog D. The teeth f of the upper dog are spaced and arranged transversely to the teeth (l and lengthwise of the carriage, so as to engage with a log or stick of timber on each side of the leg c, as shown in Fig. 3, and in connection with the teeth of the lower dog to firmly grasp and hold the log or timber against the knee.

The lever G for operating the dog is piv' oted to the head or sleeve F, and its pivot pin or stem g, which passes horizontally through said head or sleeve, is provided therein with a crank-arm 7L, to which is pivoted a pawl H. This pawl, projecting upwardly from said crank-arm, is hooked at its upper end to engage with the rack E and is connected with the crank-arm by a spring, which tends to hold the pawl in engagement with the rack, as shown in Fig. 1. A spring I, attached to the head F, is formed with bends z', which are arranged to hold the lever G .in its upper and forward position, as shown in Fig. 2. A balance arm or lever J, fulcrumed at the center to the upper part of the standard A, is connected at one end with the rack E and at the other end with a counterweight j', which is inclosed by and freely movable up and down in the leg of said standard. This counterweight is made to overbalance the lower dog alone when it is disconnected from the upper dog; but the two dogs togetheroverbalance said weight.

A guide-arm K, pivoted on the lower end of the leg c, is provided with two pins or projections la le, which work in two curved grooves in the ,under side of a guide-plate L, attached to the knee B, as shown in Figs. 1 and 3. A rod M, projecting upwardly from the guide- IOO IlO

arm K, passes loosely through a perforated lug m on the back of the sleeve or head D and holds both the upper and lower dogs in4 a constant relation to said guide-arm and to each other. The grooves in the guide-plate L are so shaped that the dogs will be held with their front faces parallel with the face of the'knee B in any position the leg a of the standard may assume, as indicated by horizontal dotted lines in Fig. 4. The movement of the leg a of the standard is limited at the extreme backward and forward positions of ythe dog by the engagement of the front pin 7s with the rear end of the groove in which it works and with a cross-pin l at the front end of said groove.

A spring N, attached at one end to the knee B :and lat lthe other end to a collar u, clamped `on the leg 6 of the standard, tends to swing A.the Lleg t of the standard, with the dogs thereon, back into their extreme backward position vand to hold them there. The collar a, which may be clamped in dierent positions on the leg Z),alfords-means for adjusting the tension of said spring.

When the dog is usedlwith large, heavy, or crooked llogs for the lirst few cuts or turns, ra-s indicated in Fig. 2, or with the sectorshaped pieces oftimber or quarters for quarter-sawing, as indicated in Fig. l, the leg a of `the standardiis left free to move forward and back between its extreme positions; but for other kinds of work when the dog` is used alone for general purposes a locking device or stop is provided for holding or stopping it in different intermediate positions. For this purpose vthe guide-arm K is provided with a spring-.depressed bolt O, which is adapted to engage with anyone of a series of holes o in the guide-plate L. The stem of this bolt, which is guided in a tubular post on the guide-arm K, is provided near its upper end, -asshown in Figs. 1, 2, and 3, with a cross-pin 0, which when the bolt is withdrawn from engagement with the guide-plate and turned slightly in either direction rests von the .upper end of said post and holds rthe bolt out of operative position. The first hole from `the rear end of the guide-plate is properly located to hold or stop the dogs in position for dogging the last board. The other holes are arranged for holding the dogs in the propel' positions for sawing lumber, such as plank and scantling, of different dimensions. To permit the dog to automatically return to its extreme backward position from any of its intermediate positionswhen the bolt YO vis used, said bolt and the holes withwhich it engages in the guide-plate L may be beveled on their rear sides.

For quarter-sawing, to more effectively grasp and hold lthe corners of thequarters or sector-shaped pieces of timber, the upper dog is provided with an auxiliary dog consisting of la plate P, fitted in the head F, between its teeth f, and provided midway between said teeth and somewhat to the rear thereof 4with a single. tooth p, as shown in Figs. 1, 3, and 6. This auxiliary dog is held in place by a spring-actuated pin q, by means of which it can be quickly attached to and removed from the head F.

The operating-lever Gis formed or provided on the outside in line with its pivot pin or stem g with a handle R for lifting the upper dog when disconnected from the rack E or both dogs when connected on the leg (t of the standard.

My improved dog operates as follows: The lower dog resting in its lowest position on the guide-arm K and the upper dog being held in an elevated position by the engagement of the pawl H with the rack E the lever G, which is held normally in its upper and forward position in the depression ofthe spring l, is thrust forward against the front bend or incline of said spring, thereby swinging` the leg t of the standard with the two dogs thereon lforward into working position, when the front guide-pin r strikes the stop-pin Z and the increased pressure exerted upon said lever dueto the sudden arrest of the forward movement of the standard' and dogs disengages the pawl from the rack, as shown in Fig. 2. The upper dog now descends by reason of its weight till its teeth f strike and slightly penetrate the log on the upper side thereof, as indicated in Fig. 2. At the same time the lower dog being relieved from the weight of the upper dog is lifted by the weight j' till its teeth CZ strike and slightly penetrate the under side of the log. The operator now relaxing his forward pressure on the lever said lever is thrown back by the resiliency of the spring I into its normal position in the depression of said spring, and the spring connecting the pawl with the pivot-pin fixed in the crankarm /t throws said pawl backward into engagement with said rack, the hooked end of the pawl entering the firstopening with which it is brought into register'. The lever is then pulled backward and downward, thereby acting through said pawl and rack to force the teeth of the upper dog downward and the teeth of the lower dog upward into the log, as indicated by dotted lines in Fig. 2. The forward pull on the dog when its teeth are forced into the log is resisted by engagement of the front guide-pin with the stop-pin Z. A reversal of the movement of the lever Gr operates first to withdraw the teeth l and f from the log, and when forced at `the limit of its upward and forward movement against the forward bend or incline of the spring' I to disengage the pawl H from the rack E. The lever G being held by the operator in its extreme forward position against the forward bend or incline z' of the spring I, the upper dog is lifted by the handle R to a position on the rack E well above that in which it will next be required to operate. The lever G, being now released, is turned slightly backward by IOO IOS

IIO.

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the spring Tinto the depression therein, thereby releasing the pawl H and permitting its spring to force it into engagement with the rack E. The weight of the upper dog being thus added to that of the lower dog, both dogs descend with the rack E till the lower. dog rests upon the guide-arm K. During the operation last mentioned the leg t of the standard with the dogs is swung backward by the action of spring N behind the face of the knee and out of range with the saw, thereby avoiding accidents and injury to the operatives or mill by reason of the dog being inadvertently left in position to run against the saw.- For operation with large, heavy, or crooked logs, as above explained, the specialposition bolt O is held up out of operative position and the auxiliary dog P is not used. For quarter-sawing, as illustrated in Fig. 1, the auxiliary dog is attached to the upper dog, as shown, so that the additional tooth p will engage with a quarter or sector-shaped piece near onel edge thereof and hold the same more firmly in place on the head-block. The special-position bolt O'may for this particular application of the dog be brought into service, as shown in Fig. l, as well as for holding the last board or lumber of dimensions making it necessary or desirable to have the dog project determinate distances in advance ofthe knees. From an examination of the drawings, in connection with the foregoing description of the construction and operation of the dog, it will be observed that its operation involves few and simple adjustments and movements to be performed by the operator, a large proportion of the movements or operations of the device being automatic, and therefore requiring no time or attention on the part of the operator. The method of operating the dog for quarter-sawing, as well as for other kinds of work, is substantially the same as that above explained for making the first few cuts and turns with large logs and will be obvious without further or more specific explanation. 1n some cases the lower dog D may be omitted, the rack E being then attached at its lower end to the guide-arm K and the upper dog' connected with the counterweight.

Various changes in the details of construction and arrangement of parts otherwise than as herenbefore indicated may be made without departing from the principle and intended scope of the invention.

1 claim- 1. In combination with a sawmill-carriage knee, a standard connected with said knee parallel with its working face and movable independently of the knee forward and back toward and from the saw-line, a dog vertically adjustable on said standard, and means tending to carry said standard and dog back out of working position, substantially as described.

2. The combination with asawmill-carriage knee, of a standard hinged or pivoted at one side thereof to lsaid knee in a line parallel with its working face and movable independently thereof toward and from the plane of the saw, a spring tending to swing said standard back from the saw-plane, adog vertically adjustable on said standard, a lever for operating said dog, and stops for limiting the forward and backward movement of the standard and dog with relation to the knee, substantially as described.

3. The combination with a sawmill-carriage knee, of a standard connected with said knee and movable independently thereof. parallel with its face, toward and from the saw-plane, a dog adjustable vertically on said standard, means tending to raise the dogon said standard, and means tending to move the standard away from the saw-plane, substantially as described.

4. The combination with a sawmill-carriage knee, of a standard having two legs, one of which is hinged to said knee parallel with its face, a dog adjustable vertically on the other leg, a lever for operating said dog, a spring tending to swing said standard and dog away from the saw-plane, and a counterweight connected with the dog and tending to lift it on said standard, substantially as described.

5. The combination with a sawmill-carriage knee, of a standard connected with said knee parallel with its face and movable relatively thereto toward and from the saw-plane, upper and lower dogs movable vertically on said standard, and means for adjustably connecting said dogs and forcing them toward and from each other, substantially as described.

6. The combination with a sawmill-carriage knee of a standard connected therewith and movable independently thereof toward and from the saw-plane, upper and lower dogs mounted and vertically movable on said standard, the lower dog being provided with an upwardly-extending rack and the Lipper dog with a pawl adapted to work with said rack, and an operating-lever connected with said upper dog and with said pawl, substantially as described.

7. The combination with a sawmill-carriage knee of a standard connected therewith and movable independently thereof toward and from the saw-plane, Vmeans tending to move said standard away from the saw-plane, upper and lower dogs mounted and vertically movable on said standard, the lower dog being attached to a rack parallel with the standard and the upper dog having a pawl normally held by a spring in engagement with said rack, and a lever connected with the upper dog and said pawl and adapted to disconnect the pawl from said rack and to move the dogs toward and from each other when the pawl engages said rack, substantially as described.

8. The combination with asawmill-carriage knee of a standard connected therewith and movable toward and from the saw-plane, upper and lower dogs mounted and vertically and adapted to m'aintain the working face of the dog in all positions of the standard parallel with the face of the knee, substantially as described.

10. rl`he combination with a sawmill-carriage knee of a standard pivotally connected therewith and movable toward and from the.

sav-plane, upper and lower dogs mounted and movable vertically on said standard, the lower dog being attached to a rack parallel with the standard and the upper dog being .provided with an operating-lever and with -a pawl connected with said .lever and adapted to work with said rack, and a guide-arm connecting the standard with a guideway on the knee and having a sliding connection with the lower dog adapted to maintain the working faces of the dogs parallel with the working face of the knee in all positions of the standard, substantially as described.

l1. The combination with a sawmill-carriage knee of a standard pivotally connected therewith and movable toward and from the saw-plane, a dog mounted and vertically -adjustable on said standard, stops for limiting the movement of said standard in its extreme positions, and a special lock or stop for intermediate positions of the standard, substantially as described.

12. The combination with a sawmill-carriage knee of a tubular standard having parallel legs, one of which is hinged or pivoted to said knee, dogs mounted and vertically adjustable on the other leg, Vthe lower dog being attached to a rack extending upwardly therefrom parallel with the standard and the upper dog having a lever and a pawl connected therewith vflor engaging the rack and connecting and operating the dogs, and a lever fulcrumed to the upper part of the standard and connected at one end with the lower dog and at the other end with a counterweight which is inclosed and movable up and down in the pivot-leg of the standard, substantially as described.

13. The combination with a sawmill-carriage knee of a'standard connected therewith and .movable independently thereof toward and from .the saw-plane, dogs mounted and.

lmovable vertically on said standard, means for connecting said dogs and moving them toward and from each other, and an auxiliary dog detachably tted to said upper dog and havinga tooth adapted to be secured between and behind the rteeth of said upperdog which are arranged on opposite sides of said standard for quarter-sawing, substantially as Adescribed.

14. The combination with a sawmill-carriage knee of a standard pivotally connected therewith and movable toward and from the saw-plane, a spring-tending to move and hold the standard away from the saw-plane, dogs .mounted and vertically movable on said standard which is free to turn therein, means for connecting and disconnecting said dogs and for moving them toward and from each other, a guide-arm pivoted to said standard and having a slidingeonneetion with the lower dog parallel with said standard, and a guideway engaging -said guide-arm and adapted to maintain the working faces of the dogs parallel with the face of the knee in all positions of the standard, substantially as described.

In witness whereof I .hereto aiix my signature in presence of two witnesses.

` WILLIAM H. TROUT. Witnesses:

CHAs. L. Goss, BERNARD C. RoLoFF.

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