US610892A

US610892A - Rock-drill

Info

Publication number: US610892A
Authority: US
Publication date: 1898-09-20
Anticipated expiration: 1915-09-20

Description

No. slosz. Patented sept. 2o, |398. w. B. BnouKs & T. ALTMAN.

BUCK DRILL.

(Application filed July 20. 1897.) (No Model.) 3 Sheets-Sheet l.

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G Y 's L o a @if/:espes: MAM/1 @Vian/Ca W qw Mov: @6W/TM we Nonms PETERS co, worn-unna., wAsmNGToN, o. c.

No. 6|0,892. Patented Sept. 20, |898. W. B. BROOKS & T. ALTMAN.

H D C K D R L L (Application led July 20, 1897.)

3 Sheets-Sheet 2.

(N0 Model.)

Tm: News paens ca, Pnouumo., wAsmNnTnN. u. c`

No. 6|0,892. Patented Sept. 20, |898.

W. B. BROOKS & T. ALTMAN.

R 0 C K D RI L L .v

(Application filed July 20, 1897.)

3 Sheets-Sheet 3.

(No Model.)

'me Nonms PETERS co. Pno'rcurno., wAsmNa'roN. o. cv

ITEM

VILLIAM ll. BROOKS AND TIIOMASALTMAN, OF FAIRMONT, WEST VIRGINIA.

ROCK-DRILL.

SPECIFICATION forming part of LettersPatent No. 610,892, dated September 20, 1898. Application met truly/20u89?.v serrano. 645,213. or@ model.)

To a/ZZ whom l? mag/concern:

Be it known that we, WILLIAM B. BROOKS and THOMAS ALTMAN, residents of Fairmont, in the county of Marion and State of West Virginia, have in vented a new and useful Improvement in Rock-Drillsg and we do hereby declare the following to be afull, clear, and exact description thereof.

Our invention relates to drills for drilling coal, rock, die.

The objects of our invention are to provide a simple form of drill which can be moved in such a manner that the drill-bar can be directed into the material to be drilled in such a way as to give the best results, While at the same time the drill can be mounted, if desired, on a coal-cutting machine, so that irnmediately after the operation of the coal-cut ting machine the drill may be brought into play, the same motor which operates the machine acting to operate the drill. However, the objects of the invention, as Well as its novel features, Will all appear in thespecication and claims which follow.

In the accompanying drawings, Figure l is a side elevation of our improved drill mechanism shown in connection with a coal-cutting machine. Fig. 2 is a side elevation of the drill mechanism shown Ona larger scale. Fig. 3 is an end elevation, partly in section. Fig. 4 is a side elevation opposite to that shown in Fig. 2, with the drill-post lowered. Fig. 5 is a detailed section of the gearing. Fig. 6 is a plan view of the feed-bar and its bearings. Fig. 7 is a section on the line 7 7, Fig. 6. Figs. S and 9 are details ofthe bracket in which the smaller spiral gear is journaled. Fig. l0 is a section showing the manner of hingingthe drill-post. Figs. 11, 12, and 13 are details of the feed-nut and eccentricwedge.

In the construction shown the drill is attached to a coal-mining machine A of any suitable construction, that illustrated being what is termed a chain-machine, which is operated by the electric motor B. It is, however, obvious that it may be used in conjunction with any machine operated by any other motive power, such as steam, air, &c.

Secured to the upper face of the motor B is thebed-plate C, upon which is mounted the saddle c, said saddle being so mounted lthe bearings f2 f3.

thatvitmay slide thereon, as will be more `fully hereinafter described. Secured at one corner of the saddle cis the stem c', and journaled on this stem is the sleeve D, to which is hinged the drill-post E. -The sleeve E is mounted to slide up and down upon the drillpost E and carries at its upper end the frame F, which supports the feed-bar G, the frame F being mounted to swing in the bearing E2, which forms a part ofthe `sleeve E. The frame F is clamped. in any desired position by means of the eyebolt E3. The frame F is composed of Ithe arlnf, with the trunnion f near one end thereof, whichffits in the bearing E2, and at the ends of the arm f are formed lTournaled in these bearings fz f5 are `the bushings f4 f5, the bushing f4 having the enlarged portions f6, which form collars and keep the bushing in place in the bearing when the cap f7 of the bearing f2 is bolted in place. The bushing f5 has cast thereon thering f8, which fits in the annular groove fg, formed in the bearing f3, which is held in place by the cap fw, secured to the bearing by means of bolts.

The feed-bar G has formed therein the key- ,way g, which extends throughout" its entire length and into which iitlthe keys f fm, which are secured upon the inner faces of the bushings f4 f5, respectively. The feed-bar G is hollow and is threaded throughout its entire length for a purpose more fully hereinafter described. Int-o one end of the bar G is threaded the drill-chuck g', in which is formed the seat g2 for the purpose of receiving the end of the drill G. The bushing f4 extends beyond the bearing f2 and has threaded thereon the spiral gear h, which is 4countersunk to receive the collar f6, which is formed on that side of the bushing, and the gear h is thus allowed to fit up close to the bearing f2. A portion of the bushing also extends beyond the gear h, as at fw, upon which is mounted the bracket-bearing h2, in which is journaled the small spiral gear h', which meshes into the gear h.

We provide for revolving the feed-bar G in the following manner: Secured to the end of the motor-shaft Z) isthe bevel-pinion b', which meshes into the bevel-gear h2. A shaft h3 is journaled in the swingingy frame I, to which is keyed the bevel-pinion h4. The pinion b4- IOO has formed thereon the threaded extension h5, to which is secured the gear Z22. In this manner the gear h2 revolves the pinion b4 and the shaft b3. The shaft b3 is journaled in the bearings t' Z' of the swinging frame l, which in turn is mounted to swing in the boXesjj' of the depending brackets J J', which are secured to the bed C. The shaft h5 has the bevel-gear lf( keyed to its lower end, said gear 57 being in position to mesh with the pinion b4 and to be revolved thereby. The shaft b5 is journaled in the bearing 2, which forms a part of the frame I.

The telescopic shaft K is secured to the shaft b5 at its upper end by means of the universal joint be. The telescopic shaft K, as shown, is formed in three parts 7a Zt' 7a2, which fit the one into the other, the part k2 fitting into the part Zt' and the part Zt' in turn fitting into the part 7c, for the purpose more fully hereinafter described. A pin 7c3, passing through one side of the part 7c', near its upper end, slides in the groove 7a4 and keeps the part 7a2 from being withdrawn from the part tom of the part k2, the parts being formed polygonal in cross-section, so that they will revolve in unison. The part 7a2 is attached at its upper end to the shaft h5 of the small spiral gear h' by means of the universal joint h4. The teeth of the gears h and t' are preferably cut atan angle of forty-five degrees to their axes. This is found to be the most convenient form of connecting the shaft K withthe feed-bar G; but it is obvious that bevel-gears or any other known form of connection might be used without departing from the spirit of our invention.

The bracket-bearing h2 is mounted to swing upon the portion f13 of the bushing f4, as before mentioned. This is for the purpose of placing the shaft h3, carrying the spiral gear Zt', so that said shaft h5 and telescopic shaft K may be placed as near in line as possible. A bolt h5 is secured to the bracket h2 and passes through the slot h5 of the segmental guide-arm 717, said guide-arm being connected to the arm f of the frame F and has threaded upon its outer end the ring-nut 72,8. By this means the bearing h4 is clamped in any desired position in reference to the shaft K, and at the same time the gear h is kept in such a position that it will always mesh with the gear h, the bracket-bearing h2 being mounted to swing on the saine center upon which the gear Zt revolves. By means of the gearingl just described the motion of the motor-shaft b 4 is imparted through the bevel-pinion b' to the bevel-gear b2 and to the shaft b5, which in turn revolves the shaft b5 through the bevel-pinion h4 and the bevel-gear 227. The motion is thus imparted to the telescopic shaft K and thence to the shaft h5 and spiral gear h' thereon through the universal joints bs and h4. The spiral gear h', meshing with the spiral gear Zz., imparts motion to the bushing f4, which through the key f, sliding in the keyway g The groove Zt* extends nearly to the bot- 4 of the feed-bar G, imparts motion thereto to revolve the same and the drill which is seated in the end of said feed-bar G. As the feedbar G is revolved a feeding or forward motion is imparted thereto in the following manner: A feed-nut L, formed in two parts Z Z', is hinged upon the bolt Z2, whose end is threaded into the depending lug Z3 of the bearing f5. The parts Z Z' of the nut L form the jaws of the nut and are internally threaded to correspond to and receive the thread formed upon the periphery of the feed-bar G. The fingers Z4 Z5 extend beyond the hinge, the lower linger Z5 having attached thereto the pin Z5, upon which is pivoted the eccentric wedge Z7. This eccentric wedge has the wedge-faces Z8 thereon, which slide between the fingers Z4 and Z5, and when the eccentric Z7 is turned in the proper direction these faces act to force the fingers Z4 Z5 apart and close the jaws Z Z' upon the feed-bar G. The internal threads cut upon the interior of the jaws Z Z', entering the threads upon the feed-bar G, and thus acting to feed the bar G forward as said bar is revolved. The lingers Z9, which are formed upon the eccentric, straddle the lingers Z4 Z5 of the nut L and act to force the jaws Z Z' open when the eccentric is turned to withdraw the wedge from between the fingers Z4 Z5. When the jaws of the nut L are thus opened, the feedbar G can be withdrawn from the frame F.

The sleeve E' is free to slide up or down upon the drill-post E, and we provide for raising and lowering the same in the following manner: The drill-post E is square in cross-section, and upon its corners we cut the threads e. A sleeve e' immediately below the sleeve E' surrounds the post E and is internally threaded to lit the threads e, and when said sleeve is revolved upon the post E by means of the hand-Wheel e2 it is propelled up or down the post, as may be desired, and the sleeve E', carrying the frame F,the feed-bar G, and drill G', is thus raised or lowered to any desired position. The telescopic shaft K will either be extended or shortened as the drill and feed-bar are thus raised or lowered, so that the shaft K will take the required length between the universal joints ligand h4, the parts k, Zt', and k2 of said shaft K sliding in or out of eachother, as required for adjustment. A bearing es projects from the sleeve E', in which is mounted to slide the plunger e4 at the end of the stem e5. A lever e is pivoted to the outer end of the stem e5, a spring e7 acting to f ,orce the plunger against the upper end of the sleeve e'. Teeth are cut on the inner face of the plunger e4, which lit into the teeth e3, formed on the upper periphery of the sleeve e'. When the lever e is in its normal position, the spring e7 forces the teeth of the plunger e4 into engagement with the teeth e3 of the sleeve c and holds the sleeve from revolving upon the drill-post E. When it is desired to raise or lower the sleeve E', the operator grasps the lever e5 and operates it to withdraw the teeth of the plunger e4 from IOO IIO

engagement with the teeth e2 of the sleeve e. The sleeve c2 is then free to be revolved by means of the hand-wheel e2, and the sleeve E may thus be raised or lowered to the desired position, when it may be locked in place by operating the lever e, so that the teeth of the plunger may again engage the teeth e2 of the sleeve e. A pin or bolt e9 passes through the sleeve E and engages with the groove elo, cut in one side of the drill-post E. The slot @10 does not extend quite the full length of the post, and the pin e9 thus keeps the sleeve E from sliding off the post E, while at the same time allowing it free movement upon said drill-post.

When the drill is not in use, it is desirable that it may be lowered, so that it may not be in the way of any projections or obstructions during transportation. To accomplish this, we have hinged the drill-post E to the sleeve D, so that it may be swung down when so desired. The hollow pin or bolt D is turned to a smaller diameter at each end, as at d d', these ends being threaded. One end is screwed into the sleeve D, as at d, the sleeve D being formed with the disk-face D2, into which the bolt is screwed. The drill-post E sets into the socket cl2, which is formed with the diskfaces (Z3 d4. The bolt D/ passes through the socket cl2 and the drill-post E therein. A lug d5, formed upon the disk d2, extends over the circumference of the disk D2 and is designed to engage or abut against one of the lugs d CF, formed upon the disk D2. A washer d8 fits around the threaded end CZ of the bolt D and is held in place by means of the nut d2. The face of the disk cl2 of the socket d2 is thus held against the face of the disk D2 by means of the washer d2 and the nut d2, but not so close but that the socket d2 may revolve freely around the bolt D'. A plunger d10, sliding loosely in the boss du, formed on the disk D2, enters a seat (7,12, provided therefor in the disk d2, and holds the drill-post E in a vertical position, the spring 12 acting normally to hold the plunger d10 in engagement with the seat. A lever d14 when operated removes the plunger d10 from its seat, so that the drill-post E may be lowered. The lug d5 abuts against the lug d and limits further movement of the drill-post when the plunger d10 enters its seat to hold the drill-post in a vertical position, and likewise the lug d5, coming into engagement with the lug d'7 when the drill-post E is lowered, limits any7 further movement in that direction and keeps the drill attachments from coming in contact with any part of the machine to which they may be attached. A pin or bolt (E15 passes through the sleeve D and engages the annular slot or groove c2, formed near the upper end of the stem c', and prevents the sleeve D being removed from the stem c, while at the same time it is free to revolve or swing upon said stem, thus allowing the drill to` be pointed at any desired angle parallel with the base of the machine.

A clamping-plate c2, being hollowed out or concaved on one side to conform to the contour of the stem c', sets in a seat D3, provided therefor in the sleeve D, and is held firmly against the stem c by means of the screw c4,

lwhich is threaded into the hollow bolt D,

the screw c4 being provided with a handpiece c5, by which :it may be turned and the plate c2 forced into contact with the stem c' and the sleeve D thus clamped to hold the drill in any position desired with reference to the post c.

It will be observed that the drill-post E is not supported on its axial line, but is supported to one side thereof, as the sleeve Dis mounted on the stem c to one side of the axial line of the said drill-post. This brings the drill-rod, which is also mounted to one side of the axial line of the drill-post E at the upper end thereof, in line with the stem c upon which the drill-post is mounted. By this construction there is not so much tendency on the part of the drill-rod when in operation to move the drill-post when it is clamped into position.

The saddle c is dovetailed on its under face and slides upon the bed-plate C, so that the drill may be adjusted laterally, a ring-bolt C acting upon the clamping-bar C2 to hold the saddle firmly in any desired position upon t-he bed-plate C.

As before stated, the frame I is journaled to swing in the bearings jj' of the depending brackets J J. A toothed segment t2 is formed upon the frame I, said segment being engaged by the teeth of the plunger j2, which slides in the hollow lug js, formed on the bracket J', the teeth of the plunger j2 being held in engagement with the teeth of the segment t2 by means of the spring jt. A lever ,7'5 acts to withdraw the plunger when it is desired to change the position or direction of the bearing t2 of the frame I. This is for the purpose of keeping the shaft Z1 as near in line as plossible with the telescopic shaft K when for any reason they should be thrown out of line-as, for instance, the sliding of the saddle c upon the bed-plate C.

wWhen the drill is not in use, it is desirous that the gear-in g for operating the same should be thrown out of engagement with the motorshaft. This is especially the case when the drill is attached to another machine, which in the instance shown is a coal-cutting machine, and the motor is used for operating other mechanism. To providefor this, the shaft-bearings t' t" are so mounted in the journal-boxesjj as to providefor a lateral movement therein. A collar 58 is secured to the shaft b2 at the outer end of the bearing t' by means of aset-screw b2, and the hub b5 of the bevel-pinion b4 sets against the inner end. of the bearing t, the shaft thus being held from lateral movement in the bearings t' 71'; The

outer end of bearings t" has a convex face t4, against which fits the concave face of the collar m', which slides freely on the rod m. The

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rod m eXtends beyond the collar m into the bearing t" and carries a pin m2, which slides in the slots Q15, formed on the inside of the bearing t', as shown in dotted lines, Fig. 5. A collar m3 is threaded on the outer end of the rod m, and interposed between said collar m3 and collar m is the spring m4. The bolt u is threaded into the end of the rod m and has the head n' thereon, which locks the collar m3 in place. A lever O is pivoted to the arm jz of depending bracket J at O and carries the short arm O2, which is pivoted to the head of the bolt n at O3. A stop p on the arm J2 limits the upward movement of lever O. A curved leaf-spring q is attached to the lower end of bearing-boxj, its free end bearing against the inner face of the collar q', keyed to the outer end of bearing c".

In Fig. 5 we have shown the gear b2 in engagement with the pinion b', the parts thus being in position to operate the drill. l/Vhen it is desired to throw the drill parts out of engagement with the motor, the operator depresses the lever O, withdrawing the face of the shoulder m from engagement with the end face of bearing e" and allowing the spring q to act against the collar q', sliding the frame I in bearings j and j. As the frame thus slides it carries the shaft b3 with it and disengages the bevel-gear b2 from the pinion b. When the parts are in this position, no power is transmitted to the drill.

By raising the lever O the rod m is thrown in and the spring m4 forces the collar m against the end of bearing i', forcing the gear b2 into engagement with the pinion Z9', and power will then be transmitted through the gearing previously described to operate the drill G. The pin m2, passing through end ofV rod m and sliding in the slots 5, is for the purpose of keeping rod m from being withdrawn altogether from the end of bearing t', and allows the frame I to be moved by the compression and expansion of the springs m4 and q, respectively. As the joint O2 moves around the pivotal point O the concave face of the collar m slides upon the convex surface t4 of the end of bearing t" and allows of a positive bearing between the two surfaces. When the gear b2 has been thrown into engagement with pinion b', the joint O2 lies below a horizontal line drawn through the pivotal point O' of lever O and the spring q acts to keep the parts in the position just described, the pin p limiting the upward movement of the lever O.

The operation of our improved drill connection is as follows: When the drill is attached to a coal-cutting machine, as illustrated, the power is applied to operate the coal-cutting machine A, the drill mechanism being iirst thrown out of gear with the motorshaft by depressing lever O. When the undercutting has been accomplished, the drillstandard is revolved upon the shaft D', rais- By means of the lever e6 the pawl e4 may be raised from engagement with the teeth e5 of the sleeve e8, and by turning wheel e2 the drill-bearing may be raised or lowered to the desired height, when the lever c6 is again operated to lock the collar e from further motion. By means of the saddle c sliding upon the bedplate O any lateral adjustment desired may be had andthe parts locked by means of the ring-bolt c. By revolving the parts upon the stem c the drill may be adjusted in a parallel plane and thereclamped by means of the hand-screw c4, acting to force the segment c3 against the stem c. By loosening the eyebolt E3 the frame F may be tilted as desired and there clamped by means of the aforesaid eyebolt E3. When the drill has thus been adjusted to the desired position, the gear-frame I is turned upon the hollow bearings i i', so that the shaft b may be as nearly in line as desirable with the telescopic shaft K. The shaft h3 is then alined with the shaft K by means of the bearing-bracket 7a2, moving around the end fm of bushing f4 and guided by the segment hi. By raising the lever O the bevel-gear h2 is thrown into engagement with the bevel-pinion b on end of motorshaft b, and power is then transmitted through the parts described to revolve the drill. The gearing operating the coal-cutter is of course first thrown out of engagement. As the drill revolves the feed-bar G is fed forward by means of the nut L, by which it is revolved. In this manner the drill is operated until a hole of the desired depth has been drilled. The motor is then reversed and the drill is then rapidly withdrawn from the hole thus drilled. The drill can then be adjusted in the manner hereinbefore set forth for the operation of drilling another hole.

The parts of the improved drill are so constructed and arranged that they may be quickly adjusted at different positions and held securely in those positions during the drilling operation.

The drill is so compact and easily handled that it may be mounted on the motor or other convenient part of an ordinary coal-mining machine, so that a separate and distinct support is not required for the drill. This is a matter of great convenience, as the same rnotor is employed for operating both machines and the drill is always in position to be brought into play immediately the undercut has been made by the mining-machine.

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Vhen not in use or when in course of transportation from one place to another in the mine, the drill may be lowered into the position shown in Fig. 4, so that it may be transported without danger of striking the roof of the mine or any depending obstructions.

By having the drill mounted lon the saddle, which can be moved laterally with reference to the wall of coal, the drill-bar can always be fed to the wall of coal at a right angle instead of having to feed the drill at another angle. The drill-bar enters the coal on a line parallel with the undercut. 'Iliisis the case whether the hole is to be drilled at an elevated point or at a lower level, owing to the fact that the post upon which the drill-bar is mounted, together with the shaft which transmits motion thereto, permit of the adjustmentof the drillbar at different heights without tilting the drill-bar at an angle of incline.

Vhat we claim as our invention, and desire to secure by Letters Patent, is-

l. The combination with a suitable frame, of a threaded upright bar hinged at its lower end thereto, a sliding sleeve on said upright, drilling mechanism carried by said sleeve, a threaded collar on said threaded upright below said sleeve, a telescopic rotary shaft eX- tcnding up adjacent to said upright, and connections between said telescopic shaft and aid drilling' mechanism, substantially as set orth.

2. In a drill, the combination of an upright having threads thereon, a sleeve loosely mounted thereon, drilling mechanism carried by said sleeve, a collar engaging said upright below said sleeve, said collar having teeth formed therein around its circumference, a pawl engaging said teeth, and means for operatin g said drilling mechanism ,substantially as set forth.

3. In a drill, the combination of an upright having threads thereon, a sleeve loosely mounted thereon, drilling mechanism carried by said sleeve, a collar engaging said upright below said sleeve, said collar having teeth formed therein, an arm on said sleeve, a plunger in said arm, said plunger having teeth engaging the teeth on said collar, and a spring acting on said plunger', substantially as set forth. l

4. In a drill, the combination of an upright having threads thereon, a sleeve loosely mounted thereon, drilling mechanism carried by said sleeve, a collar engaging said upright belonT said sleeve, said collar having teeth formed therein, an arm on said sleeve, a plunger in said arm, said plunger having teeth engaging the teeth on said collar, a stem on said plunger, a spring interposed between said plunger and arm, and a lever for withdrawing said plunger, substantially as set forth.

5. In a drill, the combination of a suitable frame, an upright stem thereon, a sleeve journaled on said stem, a clamping-plate within said sleeve,an upright mounted on said sleeve, and drilling' mechanism carried by said upright, substantially as set forth.

6. In a drill, the combination of a suitable frame, an upright stem thereon, a sleeve jou rnaled on said stem, a clamping-plate within said sleeve, a shaft extending out from said sleeve, a rotatable disk `on said shaft, the inner end of said shaft being in contact with said clamping-plate and means for moving said shaft longitudinally, an upright mounted on said disk, and drilling mechanism carried by said upright, substantially as set forth.

7. In a drill, the combination of a suitable frame, an upright mounted thereon, athreaded drill-bar supported by said upright, mechanism for revolving said drill-bar, a two-part hinged sleeve encircling said drill-bar, said sleeve being threaded internally, and a wedge adapted to move between the inner ends of said parts composing said sleeve, and lingers on said wedge adapted to straddle said inner ends, substantially as set forth.

8. In a drill, the combination of a suitable frame, an upright mounted thereon, drilling mechanism carried by said upright, mechanism for raising and lowering said drilling mechanism on said upright, a gear carried by said upright, a rotatable telescopic shaft eX- tending up from said frame, a swinging bracket supported by said upright, a supplemental shaft journaled in said bracket, a gear on said supplemental shaft meshing with the aforesaid gear, said shafts being connected by a universal joint, a rigid arm having a slot therein, said bracket engaging said slot, and means for clamping said bracket at different positions Within said slot, substantially as set forth.

9. In a drill, the combination of a suitable frame, an upright mounted thereon, drilling mechanism carried thereby, a longitudinallymovable frame, a horizontal shaft j ournaled in said movable frame, a vertical shaft journaled in said movable frame, connections between said vertical shaft and the drilling mechanism, connections between said vertical shaft and a power-driven shaft, and means for moving said longitudinally-movable frame to make and break said last-mentioned connections, substantially as set forth.

10. In a drill, the combination of a suitable frame, an upright mounted thereon, drilling mechanism carried thereby, a longitudinallymovable frame, a horizontal shaft journaled in said movable frame, a vertical shaft journaled in said movable frame, connections between said vertical shaft and the drilling mechanism, a bevel-gear on said vertical shaft en gagin g a bevel-gear on said horizontal shaft, a second bevel-gear on said horizontal shaft engaging a bevelgear on a power-driven shaft, and means for moving said longitudinally-movable frame to free said last-mentioned gears or throw same into engagement, substantially as set forth.

11. In a drill, the combination of a suitable frame, an upright mounted thereon, drilling mechanism carried thereby, a longitudinally- IOO IIO

movable frame, zt horizontal shaft joui-nailed In testimony whereof We, the said WILLIAM in Said movable frame, connections between B. BROOKS and THOMAS ALTMAN, have here- Io said vertical shaft and the drilling meehanunto set our hands.

ism, connections between said vertical shaft WILLIAM B. BROOKS. and a power-driven shaft, land a spring inter- THOMAS ALTMAN.

posed between the main frame and seid lon- Witnesses:

gitudinally-moveble frame, substantially as A. B. FLEMING,

set forth. GEO. DE BoLT.