US589014A - Feed mechanism for band-saw resawing-machines - Google Patents

Description

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F. MGDONOUGH. FEED MECHANISM FOR BAND SAW RESAWING MACHINES.

No. 589,014. Patented Aug. 31 1897.

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' F. MQDONOUGH. FEED MECHANISM FOR BAND SAW RESAWING MACHINES.

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v P. MGDONOUGH. FEED MECHANISM PORBAND SAW RESAWING MAGHINES.

.No. 589,014. Patented Aug. 31,1897.

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FEE'D MEGHANISM FOR BAND SAW RESAWING MACHINES: No. 589,014.. I Patented Aug. 31,1891,

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Patented Aug. 31,1897.

P. MODONOUGH. FEED MECHANISM FOR BAND SAW RESAWING MAGHINESQ a h" m}. v 6 7 m m M ,9 NW 1 1 w I w 2% m J M .v w w 1 f y H L H 1 m E v/I\|\' m T IIIII Il 8 :5 7 i 11111 1/ m lllllllllllHllHllin (No Model.)

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UNITED. STATES" PATENT OFFICE.

FRANIQMCDONOUGH, OF EAU CLAIRE, VISCONSIN.

FEEDQJMEOHANISM FOR BAND-SAW REsAwmc-M c mEs.

SPECIFICATION forming art of Letters Patent No. 589,014, dated August 31, 1897. I I i V V I Application filed October 3, 1896. Serial Nb- 60'7,797. (No model.)

To (1 55 mama flung/concern:

Be it knowuthat I, FRANK McDoNoUGH, a citizen of the'United States, residing at Eau Claire, in the county ofEau Claire and State of Wisc'onsimha've invented a new and use-, ful Feed Mechanism for Band-Saw Resawing- Machines, of which the following is a 'specifi cation;

. sists in the novel construction, combination,

and arrangement of parts hereinafter more fully described, illustrated, and claimed.

In the drawings, Figure 1 is a top plan view of the band-resaw feed-works constructed in accordance with this invention. Fig. 2 is a side elevation thereof, partly in section. Fig.

3 is an end View, partly in section, of the feedworks. 'Fig. 4 is a plan view of the roll-adjusting mechanism employed in connection with the set of feed-rolls next to the saw. Fig. 5 is a similar View ofthe roll-adjusting mechanism employed in connection with the first set of feed-rolls'farthest from the saw. Fig. 6 is an enlarged plan View of the equalizing-lever connections with the pair'of adjusting screw-rods for each pair of slide-tables. Fig. 7 is an enlarged detail sectional view of the adjustable bearing-box support for the upper ends of the first set of feedrolls. Fig. 8v is a similar View on the line 8 8 of Fig. 2. Fig. 9 is an enlarged detail section al view of the pivotal bearing-support for the lower ends of the intermediate feed-rolls.

Referring to the accompanying drawings, the numeral 1 designates the base of an ordinary band-saw mill and having the usual stand 2 for carrying the lower guide 3 for the band-saw 4, such construction being common in connection with ordinary band-saw mills and is illustrated for the purpose of showing the relation of the feed-works to the saw at.

The entire feed-works for use in connection with the saw at are supported by a baseframe 5, which is'bolted to the foundation of the mill far enough back from the saw to permit of the adjustment of the feed-works, so thatthe saw may be readily'taken OE and put on, as will be hereinafter more particularly referred to. The base-frame 5 is provided at opposite upper sides with the longitudinally-disposed dovetailed slideways 6, which are slidably engaged by the opposite parallel dovetailed slide-feet 7 ,proj ected from the under side of the movable feed-carriage 8 and forming a part of such carriage. The feed-carriage 8 is movable longitudinally of the base-frame 5 toward and away from the band-saw at, and has fitted to its under side at a suitable point the fixed feed-nut 9, which is engaged by the carriage-adjusting screw 10, swiveled near its outer end, as at 11, in a transverse bearing-bar 12 at one end of the base-frame 5, and having fitted on its extremity at the outer side of the bearing-bar 12 the jam-nuts 13 for securing the screw stationary-after the proper adjustment of the carriage toward or away from the saw, it being noted that the set-screw 10 is turned in any suitable manner at its outer end to provide for the sliding movement of the carriage 8 when necessary, as will be more fully explained.

The slidable feed carriage 8 essentially comprises the parallel slide-feet 7 and a pair of transverse semitubular table-supports 14, spaced a distance apart and of a greater length than the width of the base-frame 5, on which the carriage slides. The transverse se1nitubular table-supports 14 form casings or housings for certain parts of the feed-works, to be hereinafter referred to, and are provided at their opposite upper side edges with the longitudi nally-disposed guide-flanges 1-5, that are slidably engaged by the inturned slideflanges 16 at opposite side edges of the slidetables 17 17, mounted to slide on top of the supports 14: and forming top plates therefor. Interposed in the spaces between the interlocked flanges 15 and 16 are suitable wearplates 15, properly adjusted to a working fit by means of the set-screws 10, mounted in the flanges 16, it bein obvious that the wearplates and the setscrew adjustments therefor provide ready means for taking up any looseness that may occur from the wear of the parts. A pair of the slide-tables is mounted on each of the transverse table-supports 11 and are designed to carry a set of feed-rolls for assisting in accurately feeding the timber to the saw 1 for the purpose of being resawed. In the present invention each of the pair of slide-tables 17, mounted to slide in opposite directions on the transverse tablesupport 1-1 farthest from the saw, supports thereon an upright roll-bracket 18, provided at its upper end with a horizontally-disposed squared guide-yoke 19, at the outer side of which yoke the bracket is formed with a hollow oi'fstanding boss 20, provided therein with a threaded opening 21 to adjustably receive an exteriorlythreaded adjusting-sleeve 22, provided at its outer end with a squared head 23 and loosely receiving therein an adjustingbolt 2st. The adjusting-bolt et is provided intermediate of its ends with a collar 25, arranged within the boss at the inner end of the sleeve 22, and at its outer end the said bolt 91 carries a nut 26, disposed at the outer end of the sleeve 22 and providing for properly holding the sleeve on the bolt, so that by a turning of the former the latter will be moved in a longitudinal direction inward or outward to provide for the sliding adjustment of the squared sliding bearing-box 27, loosely fitting in the squared guide-yoke 19 and having the inner extremity 28 of the bolt 21 threaded therein.

The upright roll-brackets 18, carried by the oppositely-located and oppositely-movable slide-tables 17 on the front table-support 14, are each equipped at their upper ends with the bearing-boxes 27, adjustable in the man ner referred to, and said bearing-boxes are provided therein with the vertical bearingopenings 29, which receive the upper spindle extremities 2-30 of the upright feed-rolls 31, the lower spindle extremities 32 of which rolls are journaled in the pivotal bearing-collars 33, arranged at the lower ends of the rolls 30 and pivotally supported between oppositelylocated stud-pins 31-, mounted in lugs 35, projected upwardly from the tables 17 at opposite sides of the collars 33, and immediately below the pivotal bearing-collars 33 for the lower spindle ends of the rolls 31 the lower spindle ends of the rolls have keyed thereon the horizontally-disposed beveled gearwheels 30.

The horizontallydisposed beveled gearwheels 1315 are disposed below the plane of the tables 17, carrying the brackets 18, and within the tubular table-support1.4, supporting the said tables, and said gear-wheels 30 mesh with vertically-disposed adjacent beveled gear-wheels 37, provided with elongated bearing-hubs 38, mounted for rotation in bearingboxes 39, disposed within the table-support of the slide-tables 17.

11 and bolted or otherwise suitably secured to the under side of the tables 17, carrying the brackets 18. The beveled gear-wheels 37 an d their hubs 38 are feathered on the single drive-shaft 40, extending longitudinally throughout the entire length of the table-support 14 farthest from the saw and journaled in the inwardly-disposed journal-boxes 41, formed at opposite ends of the said table-support. The said drive-shaft 40 projects beyond the ends of the table-support 14c, in which it works, and has fitted on such projecting end the sprocket-wheels 42, which are employed to communicate motion to the other parts of the works, to be presently referred to, and on one of the projecting ends of the shaft 10 is fitted an extra sprocket-wheel 43, which acts in the capacity of a drive-sprocket and receives a chain from the power used for operating the feed-works, it being noted at this point that the rotation of the shaft 40 provides for the simultaneous rotation of both of the feed-rolls 31, between which the timber is fed toward the saw, said feed-rolls being also movable toward and away from each other by reason of being mounted within the brackets 18, carried by'the pair of front slidetables, or those farthest from the saw toward which the material is fed.

The slide-tables 17, mounted on the rear tablesupport 11 next to the saw, carry the upright roll-brackets 4i,whieh are curved inwardly toward the longitudinal center or saw line of the feed-works, and are provided at their upper ends with suitable bearing-boxes 45, in which are journaled the upper spindle extremities 46 of the rear feed-rolls 47, disposed in vertical parallel planes and having their lower spindle extremities 48 mounted in suitable bearing-boxes 4:9, fitted on the slide-tables 17, below the bearing-boxes at the upper ends of the brackets 44. Below the lower bearing-boxes 49 the lower spindle extremities 48 of the rear feed-rolls &7 have keyed thereon the horizontal beveled gearwheels 50, meshing with adjacent verticallydisposed beveled gear wheels 51, slidably mounted on the inner ends of the opposite longitudinally-alined shaftsections 52, and provided at one side with hub extensions 53, loosely turning in the bearing-boxes 5%, disposed within the rear table-support 1t and bolted or otherwise suitably secured to the under sides of the tables 17, such arrangement of parts being suli)stantially similar to the corresponding parts within the rear table-support 11, supporting the tables 17, excepting that in connection with the rear pair of parallel oppositely-movable feed-rolls 47 is employed separate shaftsections 52 to permit the saw 1 to project into the sawspace 53, formed in the front side of the rear table-support 14 and the adjacent ends It will be seen that by reason of this construction the feed-works carried by the carriage 8 can be adjusted close up to the saw, so that the cutting edge of the latter will be disposed close to the center of the rear set or pair of rolls 47.

I The opposite alined shaft-sections 52 are from the sprocket-wheels 42 of the shaft 40,

whereby said latter shaft will provide means for simultaneously rotating the rear shaftsections 52 and the frontfeed-rolls 4:7, geared therewith. The sprocket chains (shown in dotted lines in Fig. 1) which connect the alined wheels 42 and 55 at each side of the feed-carriage are maintained at the proper tension by means of the idler or. tightener sprocketwheels 56, arranged at opposite sides of the carriage 8 between the wheels 42 and 55, and the said sprocket-wheels 56 are mounted on the journal-bolts 57, the inner ends of which are adj ustably secured in the Vertically disposed slots 58, formed centrally in the wheel-brackets 59, arranged between the table-stipports 14, near the ends thereof, and bolted or otherwise suitably fastened thereto, as at 60, it being obvious that the vertical adjustment of the wheels 56 will provide for the proper tightening of the sprocket-chains connecting the oppositelylocated pairs of wheels 42 and 55.

The upright roll-brackets 44, carrying the rear upright feed-rolls are provided at their upper ends with the laterally-extendin g arms 61, provided with the horizontally-disposed squared guide-yokes 62, corresponding to the yokes 19 of the brackets 18 and'having adjustably mounted therein the squared sliciing bearing-boxes 63. The squared sliding bearing-boxes 63 are adjusted within the yokes 62 by adjusting devices 64, identical in construction to the bolt-adjustin g devices described in connection with the bearing-boxes 27 for the upper ends of the rolls 31, and the said bearing-boxes 63 have journaled therein the upper spindle extremities 65 of the small upright intermediate feed-rolls 66, which are of a smaller diameter than the front and rear rolls 31 and 47, but are arranged in alinement with the said rolls, respectively, at opposite sides of the longitudinal center or saw-line of the works. The upright in ,termediate feed-rolls 66 have their lower spindle extremities 67 journaled in the pivotal bearing-collars 68, pivotally supported between oppositely located stud-pins 69, mounted in opposite sides of the bearingbrackets 70, bolted or otherwise suitably secured to the slide-tables17 at one side of the upright brackets 44, carrying the rolls 4:7.

The upper spindle extremities 65 of the rolls 66 have mounted thereon the pinions 71, meshing with intermediate spur-gears 72, journaled on the bearing-studs 73, projected from the upper sides of the lateral arms 61 of the brackets 44, and said spur-gears 72 in turn mesh with the gear-wheels 74:, mounted on the upper spindle extremities 46 of the rear feed-rolls 47, whereby said latter rolls will provide means for communicating motion to the intermediate rolls 66 between the said front and rear sets or pairs of feed-rolls, as will be readily apparent. I

From the foregoing description it will be seen that the rear pair of oppositely-movable slide-tables 17 carry the rear and intermediate pairs of feed-rolls 47 and 66, while the front pair of oppositely-movable slide-tables 17 carry the front pair of feed-rolls, but all of which feed-rolls are arranged in substantial alinement and respectively at opposite sides of the saw-line of the feed-works to provide for accurately feeding the material up to the saw. In connection with each pair of oppositely-movable slide-tables supported on the table-supports 14 is employed a pair of adjusting screw-rods 75, which screw-rods are of different lengths and extend within the semitubular table-supports under the slidetables. The adjusting screw-rods 75 for each pair of the slide-tables extend beyond one end of the support for such tables and are provided with inner threaded ends 76, engaging in the feed-nuts 77, bolted or otherwise. suitably secured, as at 78, respectively, to the under side of the separate slide-tables of the pair of such tables under which the adjusting screw-rods are arranged.

The arrangement of the feed-nuts 7 7 ,whereby each of the slide-tables will carry one of such nuts, provides for the adjustable connection of one of the screw-rods 75 with one of the slide-tables of a pair of such tables, and the adjustable connection of the other screw-rod with the other table of the same pair, so that the simultaneous adjustment of the screw-rods will provide for the simultaneous adjustment of the two slide-tables.

The outer ends of each pair of adjusting screw-rods 75 loosely receive thereon the knuckle-blocks 79, which are pivotally embraced by the forked ends of a horizontal oscillatory adjusting-lever 81, arranged between the' outer ends of the rods 75 and mounted on the upper extremity of a vertical rock-shaft S2, journaled in an elongated vertical bearing-hub 83, formed at the outer side of a supporting-bracket Set, bolted to one side of the carriage 8, or to the semitubular tablesupport 14,into which the rods 75 extend. On the lower end of the vertical rock-shaft 82 is fitted the collar end 85 of a rock-arm 86, provided with a rounded tip 87 at its free terminal, which plays in the slotted end 88 of a bell-crank lever 89, pivotally mounted at its angle, as at 90, at one side of a pendentarm extension 91 of the bracket 84.. At its end opposite the slotted end 88 thereof the bell-crank lever 89 has bolted or otherwise suitably fastened thereto one end of a tension-lever 92,0n the free end of which is adj ustably mounted the tension-weight 93, which normally moves the slide-tables toward each other to provide for holding the feed-rolls against the material being fed to the saw.

One of the rods 75 of each pair has mounted at one side of the knuckle-block 79 thereon an adjusting hand-wheel 94:, engaging with a threaded portion 95 of such rod, while the other rod 75 of the same pair is threaded at opposite sides of the knuckle-block 7 9 thereon, as at 95, and on which threaded portions 95 are mounted for movement the adjusting hand-wheels 96, which provide for the adj ustment of the knuckle-block 79 therebetwcen, and the consequent oscillation of the lever 81 and opposite longitudinal movement of the two rods 75. I11 addition to the adjusting hand-wheels referred to, each pair of the adjusting-rods 75have mounted thereon the intergeared equalizing gear-wheels 97, which also have a sliding engagement to admit of the longitudinal movement of the rod 75 without becoming disengaged.

In connection with the three sets of feedrolls, which are adjusted toward and away from each other and automatically pressed against the material in the manner described, is employed a longitudinally-arranged restbar 98, secured on top of the carriage S in line with the longitudinal center or saw line of the feed-works between the oppositely-located and oppositely-movable slide-tables 17 and 17. The said longitndinally-arranged rest-bar 98 is disposed just below the plane of the lower ends of the feed-rolls, so as to form a support for the lumber passing to the saw, and at its rear end the bar 98 is forked or bifurcated, as at 99, to permit the bandsaw to extend in between the rear pair of feedrolls r7, said fork or bifurcation 99 thereby providing a rest for the lumber to a point beyond the cutting-point, which insures a true and accurate sawing of the material.

The forked or bifurcated rear end of the bar 98, in conjunction with the reentrant sawspace 523, permits the saw to extend in between the rear pair of feed-rolls 47, and it is therefore important to note the function of the intermediate feed-rolls 66. These intermediate feed-rolls 66 are necessary to insure the proper positive feed of the lumber between the rear rolls t7, as these latter rolls, while acting as feed-rolls, more properly serve as guide-rolls for the lumber. The band-saw extends directly into the space between the said rear feed-rolls 47, and it is therefore obviously necessary to provide other means than the rolls 4:7 for firmly supporting or holding the lumber adjacent to the point where the saw cuts the same. This is accomplished by the use of the rolls 66, which maintain a relatively close relation to the rear rolls 47, so as to firmly brace and hold the lumber adjacent to the rolls 4-7, and also to positively feed the lumber forward between these rolls.

In the use of the feed-works it is important to note that the works are designed for use in connection with any style of band-mill, allowing the band-saw to be placed 011 the wheels in its proper position, and not to require, as in some band-resaws, that the saw be placed on the wheels back side foremost. To accomplish this desired result, the carriage 8 moves the entire feed-works toward and away from the saw by means of the adj ustment of the carriage-adjusting screw 10. By means of this screw the whole feed-works may be moved back far enough to allow the band-saw to be taken off of the front side of the wheels, the base-frame 5 being located sufiiciently far from the sawmill to allow the saw to come forward far enough to be taken off of the wheels. This operation of the feedworks is also important, so as to dispose the cutting-point of the saw well up to the center of the rear feed-rolls, thereby avoiding any chance of the lumber being operated on springing out of place and thereby causing bad work.

In the operation of the feed-works it is sometimes necessary to plumb or adjust the feed-rolls 31 and 00, and whenever this is necessary the bearingboxes for the upper ends of such feed-rolls are adjusted inward or outward, thereby allowing said rolls to swing on the pivotal supports for theirlower ends and assume the desired inclination, so as to press evenly against timber of uneven thickness, so as to insure a constant pressure of the feed-rolls across the whole face of the material while passing to the saw. In addition to the individual adjustment of the rolls 31 and (56 all of the feed-rolls are caused to preserve a constant pressure on the material by means of the weighted lever connections with the outer ends of the adjusting screw-rods 75, it being obvious that the weights 03 cause such a movement of the lever connections therewith as to provide for moving the rods 7 5 in a direction to constantly draw the feed-rolls against the work being fed to the saw, and at this point it is to be noted that the equalizing-gears ()7, which gear the rods 75 of each pair together, are important to keep the rolls at an equal distance from the saw-line of the machine. lVhile the equalizing-gears 97 allow the pressure mechanism to move the rods 71 in a longitudinal direction, it will be understood that in first adjusting the rolls the ad justing-rods may be turned in any suit-able manner to operate in the nuts 77, and the gears 97 will cause a uniform or equal movement of the screw-rods, so that when the rolls are once set the proper distance from the saw to split a certain thickness of lumber through the center said rolls will always maintain an equal distance from the saw without further adjustment, irrespective of the opening and closing of the rolls for any other thickness of timber.

The adjusting hand-wheels at the outer ends of the screw-rods 75 are of importance to provide for adjusting the feed-rolls the proper distance from the saw-line when the machine is in operation and if from any cause the saw is not working in the exact center of the board. Under these conditions the operator can readily manipulate the adjusting hand-wheels so as to oscillate the levers Si sufiiciently to correct the uneven feeding, so it will therefore be seen that by means of the adjustinghand-Wheels the feed-Works while in operation are under perfect control so far as gaging the exact thickness of stock being sawed.

From the foregoing it is thought that the construction, operation, and many advantages of the herein-described feed-works will be readily apparent without further description, and it will be further understood that various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus described the invention, what is claimed, and desired to be secured by Letters Patent, 'is

1. In a band-resaw feed-works, a stationary base frame, and a feed-carriage slidably mounted on the base-frame and carrying a series of feed-rolls arranged respectively at opposite sides of the saw-line, said feed-carriage having a timber-rest, and a saw-receiving bifurcation formed at the side thereof next to the saw and extending into the timberrest between the rear pair of feed-rolls, substantially as set forth.

2. In a band-resawfeed-Works a stationary base-frame provided at opposite upper sides with longitudinally dis'posed slideways, a slidable feed-carriage supported on the baseframe and essentially comprising a pair of transverse front and rear semitubular tablesupports, intermediate connections between said supports, and parallel slide-feet connecting the two supports at their lower sides and engaging in the slideways of the base-frame, slide-tables mounted 011 each table-support and carrying rotary upright feed-rolls, and suitable operating mechanism having gear connection with thelower spindle extremities of the feed-rolls within the semitubular tablesupports, substantially as set forth.

3. In-a band-resaw feed-works, a stationary base-frame, a feed-carriage slidably mounted on the base-frame and having a pair of transverse front and rear semitubular table-supports, a pair ofslide-tables mounted on each of the table-supports over their open sides and carrying rotary upright feed-rolls, shafts arranged in the semitubular table-supports and geared with each other and with the feedrolls to provide for the simultaneous rotation of the latter, pressure-adjusting mechanism for the tables of each pair, and an adjusting device for the feed-carriage, substantially as set forth.

4. In a band-resaw feed-works, a stationary base frame, an adjustable feed carriage mounted on the base-frame and provided with a pair of transverse front and rear semitubular table-supports provided. at their opbase frame, a feed carriage adjustably mounted on the base-frame and having at its side next tothe saw a reentrant saw-space,

front and rear pairs of upright feed-rolls adjustably supported on the carriage respectively at opposite sides of the saw-line, the rolls of the front and rear pairs being of a uniform diameter, and the rear pair of rolls being arranged respectively at opposite sides of said saw-space, a pair of intermediate feedrolls arranged between and in line with the other pairs of rolls and in a relatively close relation to the rear pair of rolls, and suitable pressure-adjustin g mechanism for simultan eously and uniformly adjusting the rolls at opposite sides of the saw-line, substantially as set forth.

6. In a band-resaw feed-works, a stationary baseframe, a feed carriage adjustably mounted on the base-frame and having a pair of transverse front and rear table-supports, the rear of which supports is provided in its side next to the saw with a reentrant sawspace, a pair of slide-tables mounted on each of said table-supports, the rear pair of slidetables carrying two relatively close pairs of upright rotary feed-rolls, and the front pair of slide-tables carrying a single pair of uprightfeed-rolls arranged in line with the other rolls, and suitable adjusting mechanism for moving the slide-tables of each pair toward and away from the longitudinal saw-line of the works, substantially as set forth.

7. In a band-resawfeed-works, a stationary base-frame, a feed-carriage sl-idably mounted on the base-frame and provided in its side next to the saw with a reentrant saw-space to receive therein the saw, pairs of upright feed-rolls suitably mounted on the carriage respectively at opposite sides of the reentrant saw-space,adj usting mechanism for said rolls, and a longitudinally-arranged rest-bar secured on top of the carriage in line with the longitudinal-center of the Works below the plane of the lower ends of the feed-rolls and provided at its rear end with a fork or bifurcation to permit the saw to extend in between the front pairof rolls, substantially as set forth.

8. In a band-resaw feed-works, a stationary base-frame, a feed-carriage mounted on the base-frame and having a pair of transverse front and rear semitubular table-supports, a pair of slide-tables mounted on each of the table-supports over their open sides and carrying pendent bearing-boxes disposed within the table-supports, upright feed-rolls mounted on the upright table-supports respectively at opposite sides of the saw-line and carrying on their lower spindle extremities within the tablesupports horizontally-disposcd beveled gear-wheels, shafts arranged longitudinally within the front and rear table-supports and carrying on their outer ends, beyond the ends of said supports, sprocket-wheels, verticallydisposed beveled gear-wheels slidably mounted or feathered on the shafts in the table-supports and provided with hub extensions journaled in the bearing-boxes at the under sides of the slide-tables, said vertically-disposed beveled gear-wheels meshing with those at the lower spindle ends of the feed-rolls, adjusting mechanism for sliding the tables on said supports, and chain connections between the sprocket-wheels of the oppositely-located shafts, substantially as set forth.

9. In a band-resaw feed-works, a stationary base-frame, a feed-carriage slidably mounted on the base-frame and having a pair of transverse front and rear semitubular table-supports, a pair of slide-tables mounted on each of the table-supports and carrying rotary upright feed-rolls, shafts arranged longitudinally in the semitubular table-supports and geared with the lower ends of the feed-rolls, said shafts carrying at their outer ends, beyond the ends of the supports, sprocketwheels,chain connections between the sprocket-wheels of the oppositely-located shafts, wheeLbraekets arranged between the tablesupports near the ends thereof, vertically-adjustable journal-bolts fitted to said wheelbrackets, and tightenersprocket-wheels journaled on said bolts, substantially as set forth.

10. In a band-resaw feed-works, a stationary base-frame, a feed-carriage mounted on the baseframe and having a pair of transverse front and rear table-supports, a pair of slide-tables mounted on each of said tablesupports and provided with upright rollbrackets, 21 pair of upright front feed-rolls mounted in the brackets of the front pair of slide-tables, a pair of relatively close rear and intermediate upright feed-rolls mounted in the roll-brackets of the rear pair of the slidetables, the rear pair of rolls being adapted to receive the saw therebetween and said intermediate rolls being of a smaller diameter than the adjacent rear rolls, gearing connections with the lower ends of the feedrolls of the front and rear pairs, cog-gearing between the upper spindle extremities of the feed-rolls of the rear and intermediate pairs, and suitable pressure-ad j ust-ing mechanism for movin gthe slide-tables toward and. away from the sawline of the works, substantially as set forth.

11. In a band-resaw feed-works, a stationary base-frame, a feed-carriage mounted on the base-frame, front and rear pairs of upright feed-rolls movably supported on the carriage respectively at opposite sides of the saw-line, a pair of intermediate upright feedrolls arranged between and in line with the other pairs of feed-rolls and in a relatively close relation to the rear feed-rolls and the cutting-point of the saw, adjusting devices for individually adjusting the feed-rolls of the intermediate and front pairs at an inclination to a vertical plane and independently of the rear rolls, and pressure-adj ustin g mechanism for moving the rolls toward the sawline, substantially as set forth.

12. In a band-resaw feed-works, the combination of a table-support, a pair of slidetables mounted on said support respectively at opposite sides of the saw-line and provided with upright roll-brackets having at their upper ends horizontally-disposed squared guideyokes at the outer sides of which yokes are formed integral hollow offstandin g bosses provided with threaded openings, squared bearing-boxes slidably mounted in said yokes, bolts connected at their inner ends with said boxes and provided with spaced collars and nuts respectively located within and exterior to said bosses, exteriorly-threaded ad j ustingsleeve loosely mounted on the bolts between their collars and nuts and engaging in the openings of the bosses, pivotal bearing-collars pivotally mounted on the slide-tables below the adjustable bearing-boxes, upright rotary feed-rolls having their spindle extremities respeetively mounted in the bearing-boxes and pivotal bearing-collars, suitable gearing for turning said rolls, and adjusting mechanism for sliding the tables on their supports, substantially as set forth.

13. In a band-resaw feed-works, the combination of a table-support, a pair of slidetables mounted on said support respectively at opposite sides of the saw-line and carrying upright feed-rolls, a pair of adjustingrods having screw connections at their inner ends respectively with the separate slidetables and extending beyond one end of the table-support, an equalizing gear connection between the two rods, a vertical rock-shaft supported between the outer ends of the rods, an oscillatoryadjusting-lever fitted on the upper end of the rock-shaft and provided with forked ends, knuckle blocks fitted on the rods and pivotally embraced by the forked ends of said adjusting-lever, a pair of adjusting hand-wheels threaded on one of the rods respectively at opposite sides of the knuckleblock thereon, a single hand-wheel threaded on the other rod at one side of the knuckleblock thereon, a rock-arm fitted at one end on the lower end of the vertical rock-shaft, and a weighted bell-crank lever pivotally supported at its angle and having one of its arms slotted to loosely receive the free end of said rock-arm, substantially as set forth.

In testimony that I claim the foregoing as my own I have hereto ailixed my signature in the presence of two witnesses.

FRANK MCDONO UGII.

Witnesses:

FRANK II. BROWN, A. .T. KEITH.

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