US869194A - Grinding-machine. - Google Patents

Description

No. 869,194. PATENTED OCT. 22, 1907. C. H. NORTON.

GRINDING MACHINE.

APPLIOATION FILED 00T.9. 190s.

'1 SHEETS-SHEET 1.

Huiles ses No. 869,194. PATENTED OCT. 22, 1907.

C. H. NORTON.

GRINDING MACHINE.

APPLICATION FILED 00T.9 1906.

7 SHEBTS-SHEETZ.

No. 869,194. PATENTED OCT. 22, 1907. G. H. NORTON.

GRINDING MACHINE. APPLICATION FILED 00T. 9. 190s.'

7 SHEETS-SHEET 3.

PATENTED OCT. 22. 1907.

C. H. NORTON.

GRINDING MACHINE.

APPLIOATION FILED 00T.a. 1906.

'I SHEETS-SHEET 4,

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o. H. NORTON.

GRINDING MACHINE.

APPLICATION FILED 00T. 9. 1906.

7 SHEETS-SHBET 5.-

WEL/Tres s e 5 No. 869,194. PATENTED OCT. 22. 1907.

` C. H. NORTON. l

GRINDING MACHINE.

APPLIUATION FILED 0017.9. 190e.

7 SHEETS-SHEET s.

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No. 869,194. d PATENTED OCT. 22, 1907. C. H. NORTON.

GRINDING MACHINE.

APPLIGATION FILED 00129. 190e:

MEETS-SHEET 7 CHARLES HNORTON, OE WORCESTER, MASSACHUSETTS, ASSIGNOR To THE NORTON GRINDING OO., SETTS. i

OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHU- GRrNDrNG-MACHINE. I

Speciiication of Letters Patent.

Patented oct. 22,1907.

Application {lsd otober9. 1906. ,-Borisl lo. 388.159. l

To all whom 'it may concern:

Be it known that I, CHARLES H. NORTON, a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have 5 invented a new and useful Grinding-Machine, o f which the following is a specification.

My invention relates to a machine for grinding carwheels and similar objects which can be rotated on an axis while the grinding wheels are rotated in contac 1Q with the surface thereof. i

The principal objects of my invention are to provide e adjustable supports for the car-wheel axle; provide for accurately positioning the whe'el and axle with respect to mechanism for rotating the same; provide an im- 15 proved floating drive for the axle; improve the means for adjusting the position of the grinding wheels in all directions, provide convenient and effective means for automatically feeding the grinding wheels across the faces of the car wheels, provide for automatically stopping the traverse of the grinding wheels or of either of them at4 any desired time at the limit of their traverse and prevent their being stopped at any other point; provide for locating the various parts required in the operation of grinding car wheels and the like in convenient. relations with respect to each other; and generallyimprove the construction and operation of machines of this character so as to simplify the same and increase their efiiciency, and so as to operate all the mechanism from a single source of power. v Reference is to be had to the accompanying drawings, in which Figure is a front elevation of a machine illustrating my invention, parts being broken away to show elements in the rear. Fig. 2 is a plan of the same with the Over-head driving mechanism removed. Fig. 3 is a plan of one of the grinding-wheel-supports and the ltraverse mechanism for a grinding wheel on an enlarged scale. Fig. 4 is a plan of the work-drive mechanism. Fig. 5 is a transverse sectional view of a pillow block for supporting the car-wheel-shaft. Fig'. 6 is a central lony,gitudinal section of the pillow-block. Fig. 7 is a longitudinal vertical section of one of the thrust bearings. Fig. 8 'is a front elevation of .the work-drive-stand. Fig. 9 is asection on the line 9-9 of Fig. 4, showing an end elevation'of the work-drive-stand and the driving mechanism. Fig'. 10 is a face view of an equalizing lplate employed on lthe Work-drive-stand. Fig. 11 is a rear elevation of` one of the grinding-wheel slides and `wheel traverse mechanism. Fig. 12 is a plan of a por- 5,0` tion of the wheel traverse mechanism. Fig. 13 is a plan showing the wheel traverse eccentric. Fig. 14 is an end elevation of a slide-stop striker. Fig. 15 is a side elevation of one ofthe grinding-wheel slides. Fig.

`cylindrical or conical surface as a safe door, for exam- 16 is a plan of the base for said slide, and Fig. 17 is a section of' the same on the line 17-17 of Fig. 16.

Although the invention may be carried outk in a machine constructed to grind only one car wheel or other ple, I have provided convenient means whereby it may be applied in such a manner as to simultaneously grind off two conical car-wheels on an axle and the above described drawings illustrate the invention as applied in this manner.

For thev purpose of driving all parts of the machine from va single source of power, I have mounted on a base 10 a pair of uprights 11-11 which support hangers for a counter shaft 12. This counter-shaft may be d'riven from a motor 13 or other source of power, and it is provided with a seriesyof pulleys or other power transmitting devices for driving the various parte of the machine. For driving -the work I have shown` this shaftas provided with a cone-pulley 14 operating'a cone-pulley 15 shown in Figs. 2 and 4. On the shaft which carries the latter pulley is a bevel pinion 16 driving a bevel gear 17 which i's loosely mounted on a shaft 18. The gear 17 is provided with a clutch section 19,

and on the shaft 18 is mounted a sliding clutch member 20 which is manipulated by a rod 2l and a starting lever 22. When the clutch is thrown into connection with the clutch section 19 the rotation of the pulley l5 is transmitted to the shaft 18, and from that throughs. worm 23 to-a lworm-wheel 24. This 'worm-wheel is in a bearing 25 on a work-drive-stand 26 mounted on the base 10, and it is designed to rotate the work whichis shown in the present case in the form of a pair of carwheels A fixed on an axle Bwhich isshown as projecting beyond the outer sides of the wheels and rests in bearings which will be described below.

I In order to permit conveniently placing the axle in I" position, the bearing 25 is provided as usual with an opening 27l in the top thereof to permit the shaft B to be deposited in it.V -In order to permit the shaft to be lowered in this manner the worm-wheel is provided with a removable segment 28. This segment has shoulders 29 fitting corresponding shoulders on the wormwheel, and is provided with a yoke 30 which is forced against a surface 31 on the worm-wheel by any desired means in order to clamp the segment andv yoke in position. The means which I have shown for clamping l these parts is in the form of a bolt 32 projecting from the segment 28 and a nut on the bolt and on the inside bf the yoke. The worm wheelis provided with an Open center to accommodate the 4shaft B.

In order to obviate any inequality in the centering of the shaft in the worm-wheel 24, the latter is provided with an equalizing plate 33 shown in detail in Fig. 10. This plate is of a general horse-shoe shape to permit the shaft to -be lowered to the center of the worm-wheel, and it is provided with a pair ofopposite radial ways 34 for receiving grooves on the wormwheel. It alsohas grooves 35 on its opposite face, preferably located at substantially right angles to'the Ways 34, and receiving ways on a work-drive-dog 36 which is of a shape similar to that of the equalizing plate. The plate 33 has gibs 36 for assisting in holding the dog. Adjusting screws 37 are carried by the workdrive-dog for engaging the shaft and rotating the same. The equalizing plate does not positively 'support the work-drivedog in all positions, but constitutes a floating drive for the axle B, being movable to accommodate any inequalities in the centering of the latter.

The parts so iardescribed provide for rotating the axle carrying the car-wheels, but do not provide for supporting it. For this purpose a pair of pillow-blocks 38 are employed. These pillow-blocks are mounted to slide toward and from each other along ways 39 so that they can accommodate axles in which the bearings are either inside or outside the wheels. For the purpose of adjusting these pillow-blocks they arel provided with an adjusting right and left-hand screw 40, and a ratchet wrench 41 is used to engage a ratchet wheelf42 fixed to the screw for the purpose of rotating it. This screw has bearings in the stationary work-drive-stand 26 and passes into screw-,threaded openings in the pillow' blocks 38.

In order to provide forconveniently supporting the car axle Aon the pillow-blocks each is provided with a spherical bearing 43 which is free to turn in all directions but one, being kept from turning circumferentiallywith respect to thel axle by means of a pin 44 engaging a longitudinal groove in the bottom of the bearing. By using this automatic adjustment it is not necessary to be so particular about lining up thebearings, and there is no danger of binding.v

When an axle is a little small it will rest on the bottom of a cylindrical bearing and be free to vibrate therein. Consequently in this class of work such a bearing will not provide means for connecting the rotating work with the base of the machine and affording a positive non-vibrating support therefor. In orderto avoid this, I have provided means whereby the axle will always bear at two points even if it is materially smallerl than the standard bearing in the pillow block. .To accomplish this these bearings are cut out along the bottom of their bearing surfaces, and the space filled with a strip of soft yielding material 45, as felt, extending from one end of the bearing to the other and saturated with oil. Thus the'axle always will have at least two bearing points and the felt affords self lubrication.

For the purpose of preventing end play, thrust bearings are employed. To make these bearings more readily adjustable, and especially to provide for efcient operation when the center bore in the axle is not in center with the bearing surface and to otherwise improve them, I have shown them as constructed in the following manner. They are provided with slots 46 through which clamping screws pass to secure them on a projection of the pillow block. The projection has two sets o f holes 47 for the screws so that .the bearings may be placed in proper position for axles with either outside or inside bearings. The bearings are included in casings 48 one of which is provided with a sliding-spindle 49. At its bearing end this spindle has a-disk 50 on which bears a ball 51 held in position by a ball-retainer 52 and a washer 53. The ball and ball retainer are considerably smaller than the cavities in which they are located so as to have vertical and lateral play to accommodate axles, the center bores of which have got out of center. The Washer is for holding them on the casing. The spindle 49 is preferably hollow, and is provided with a screw threaded opening into which an adjusting end-thrust screw 54 is adapted to enter. This screw has a bearing 55 on the casing and hand-wheel 56 for operating it. A binding screw 57 is employed for engaging the spindle and holding itin adjusted positions and also for preventing the rotation of the spindle.

In order to properly grind the conical surfaces of the two car wheels, a pair of grinding wheels 58 are employed. These wheels are provided with shields 58n if desired and are operated from the counter-shaft 12 by means of a pair of pulleys 59-59 thereon. Binders 59 are shown to permit them to deliver power to cone pulleys 60 on the shafts on which the grinding-wheels are mounted. Each of 'these shafts is located in bearingsA `the intermediate slide is moved longitudinally with respect to the non-rotatable screw 69. The slide-base 65 is swiveled on the main base 10 of themachine, clamping bolts 70, passing through curved slots"71, being employed for holding the base in adjusted positions. The movement of the intermediate slide across 1 the slide base is very short and necessarily slow. Consequently the ways on which it slides are liable to' get gummed up in practice. To avoid this, I have inclosed'. a laterally grooved guide way 72 in a receptacle 73 for.v

oil.- On the other side of the slide-base a flat grooviedbearing surface 74 is provided which is also inclosed in a receptacle 75 for oil. It will be seen, therefore, that f vgrinding wheel to reciprocate across the surface of'the car-wheel from the flange to the edge so as to grind the same vin an ecient manner. For this purpose the counter-shaft 12 is provided with a cone-pulley 80 or the like, delivering power to a cone pulley 81 mounted on a wheel `traverse speed stand 82.l This pulley transmitspower through gears 83 and 84 to a shaft 85. This shaft is connected by a pair of clutches 86 with a pair of shafts 87, one located at each` end thereof. Each of these shaftstransmits power by means of a worm 88 andv a worm-wheel 89 to a traverse wheel eccentric 90. On each of these eccentrics is a connecting rod 91 which as has beforebeen stated, is connected with the nut 68. The rotation of the shafts 87` therefore transmits to the intermediate slide a 'reciprocating motion, and as these -is pivotally connected with one of the screws 69 which,

.slides'are adjusted in'angular position by the swiveling of the slide-bases'thefgrinding wheels are given such'a traverse they will off a cylindrical or conical' a starting lever 94. A spring 95 .is provided 'for normally forcingthe into such a position as to open the clutch and prevent transmission of power from the shaft to the shafts 87.v When the starting lever is turned, to bring the clutch sections int'o engagement, a catch 96 on the yshaft 93 slips beyond a projection on a gravity pawl 97, and the latter drops so that the projection falls behind the catch and prevents the opening of the clutch. i

For the purpose of automatically releasing the pawl 97 to permit the spring 95 to open the clutch I have' provided the following mechanism.. vOn a bracket 98 mounted at one end of the screw 69 is pivotally supported a slide-stop striker 99 having a handle by which it may be manipulated. This striker is pivoted on the bracket in such a manner that when in the position shown in full lines in Fig. 14, the heavier end of 'the striker will be on the opposite side ofthe pivot from the end of the bracket against which the other end of the striker engages, so'that the striker will remain in this position. When tipped over to the position shown in dotted lines, gravity will hold it in that position. In the latter position the end of the striker is so located that on the reciprocation ofthe screw 69, the striker will engage an adjustable screw 100 mounted'on a sliding stop pawl lifter 101. This 'lifter is provided with an arm 102 having a slantiug surface engaging under a complementary surface'ofthe pawl 97 to lift the latter on the rearward reciprocation of the screw 69 and slidestop striker. This permits the spring 95 to force the clutch sections apart. These parts are, of course, duplicated on the two sides of the machine, and the mechanism ordinarily will operate until one of the strikers 99-is tipped over in thev position shown in dotted lines in Fig. I4. Then on the next stroke of the eccentric when the latter is at the limit of its stroke in the poof the wheelsis connected with the means for adjusting the same and is operable inall adjusted positions of the slide on which the'. grinding wheel is supported.

"For thefpurposeof conveniently. supplying water for the grinding .operation the counter-shaft 12 is providedv with a pulley 103 ferdri'ving apump 104.'v This pump conveys water from a tank 105 conveniently located, through pipes 10'6 .to nozzles 107 located in proper position over the wheels. v l

It will be seen that by the employment of the princilples herein illustrated, whether in the form shown or otherwise, within the scope ofmy invention, most convenient and eiicientmeans is provided for positioning the support is adjusted.

the car-wheels or other articles befworked, rotating' the same, adjusting the pillow-,blocks to provide for inside and .outside bearings, etc., adjusting the grinding 'wheels' in all' necessary ways, causing the grinding .wheels to `traverse in'a". most efficient and simple manner,automatically stopping either or both of thegrinding-wheels at the convenience of the operator, preventing the operator stopping them at an intermediate point of their traverse, supplying water to the grinding-l wheels, and performing all the other operations which are desirable in this class of work, all from the same y source of power.

While I have illustrated and described herein an improved form of bearing and an adjustable end-thrust bearing, I do not herein claim the same, as they constitute a separate invention on which I reserve the right to file a divisional application or applications.

While `I have illustrated and described a particular form in which my invention may be embodied, I am aware that many modifications may be made therein by any person skilled in the art without departing fromthe scope of the invention as expressed in the claims. Therefore, I do not wish to be limited to the particular elements of construction shown, but

What I do claim and desire to secure by Letters Patent is:- I' y 1', In u grinding machine, the combination of a movable grinding wheel support, rotatable means for adjusting the support, und means connected with and acting through the adjusting means for reciprocating the support.

2. lIn a grinding machine, the combination of a movable grinding wheel support,'rotatable means for adjusting the support, and meuns-con'nected-with the ladjusting means for reciprocating the support in the direction in which 3. In a grinding machine, the combination of a movable grinding wheel support, an adjusting screw connected therewith, means on the support for engaging the adjusting screw, said means and screw being relatively rotatable, whereby the operation of said means will adjust the support, and means for'reclprocnting the adjusting screw.

4. in a grinding machine, the combination of a grinding wheel support, a non-rotatable screw, an adjusting nut for the screw rotatably mounted on said support, rotatable means for operating the nut and adjusting it on said screw and means for longitudinally reciprocating the screw.

5. In u grinding machine, the combination of a movable grinding wheel support, a screw, a nut on said screw mounted to move with said support, a hand-wheel,l means for connecting the'hand-wheei to produce a relative rota- .tion between said screw' and nutte adjust thesame with respect to each other, and means for longitudinally reciprocating the screw. 'Y

" fi .a

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6. In agrinding machine, the combination of a movable grinding wheel support, a non-rotatable screw, :i nut for said screw rotatably mounte'd on said support, gearing conwheel support, a non-rotatable screw, an adjusting nut for said screw mounted on the support, operating means for adjusting the nut, and mechanism for longitudinally x'eclp-v rocnting the screw. i

` 8. Inu grinding machine, the combination' of a grinding wheel support, a non-rotatable screw, un adjusting nut for said screw`mounted-on the support, operating'means 'for adjusting the nut,nnd mechanism for longitudinally recip- I rocnting the screw, said mechanismcomprising' an veceentric and :i connecting rod connected with the screw and operated by the eccentric.

9. In a grinding machine, thecmbinatlon of a movable grinding wheel support, a nut rotatably mounted there'-` on, a non-rotatable screw engaging said nut, a connecting rod connected with said screw, and anecccntric for operating said connecting rod. I

10. In a grinding machine, the combination of a movable grinding wheel support, a nui' rotatably'mountedthereom a non-rotatable screw engaging said nut, a connecting rod connected with said screw, an eccentric for operating said connecting rod, a shaft for operating the eccentric, a power shaft, a clutch between said shafts for connecting them, and means for automatically releasing the clutch.

11. in a grinding machine, the combination of a mov able grinding wheel support, an adjusting device connected therewith, a connecting rod connected with said adjusting device, an eccentricg for operating said connecting rod, a power shaft, a clutch for connecting said power .shaft to operate the eccentric, and means for autoluatica'xlly releasing the clutch.

12. In a grinding machine, the combination of a mov, able grinding wheel support, a shaft, a second shaft, a clutch for connecting said shafts, means operated by the second shaft for reciprocating said support, `a spring normally tending to release said clutch, means for positively locking the clutch in closed position, .and means for automatically releasing the clutch and allowing the spring to ,close it.

13. In a grinding machine, the combination of a grindlng wheel support, a shaft, a second shaft, a clutch for connecting said shafts, hand operated means for throwing the sections of said clutch into engagement with each other, means for positively locking the clutch in closed position, resiiientmeans for normally opening the clutch, and means for automatically' releasing the locking means comprising a movable member. n

14. In a ,grinding machine, the combination ot a grinding wheel support, means for reciprocating said support, a clutch for disconnecting said means' from a source of power, manually operatedmeans for closing the sections of said clutch, yielding means normally tending to open the clutch sections, means for automatically and positively locking the clutch in closed position to prevent the opening thereof by said manually operated means, meausfor releasing the locking means, and movable means mounted to re clprocate with said support for engaging the releasing means and operating it.

1'5. In a grinding machine, the combination of a grindlng wheel support, means for reciprocating said support, a clutch for' disconnecting said means from a source of power, manually operated means for closing the sections of said clutch, means normally tending to open the clutch sections, means-for automatically locking the clutch in closed position to prevent the opening thereof by said manually operated means, means for releasing the locking means, and movable means mounted to reciprocate with said support for engaging the releasing means at the end of the stroke of said support and permitting the clutch to open.

16. In a grinding machine, the combination oa grinding wheel support, means for reciprocating said support, a clutch for disconnecting said means from a sourceof power, manually operated means for closing the sections of said clutch, means normally tending to open the clutch sections, and means for automatically and positively locking the`clutch in closed position to prevent the opening thereof by said manually operated means.

17. In a grinding machine, the combination of a grinding wheel support, means for reciprocating said support, a clutch for connecting said means with and disconnecting it from a source of power, means for positively locking the clutch and means for automatically unlocking and disconnecting the clutch operable only at the end of the stroke of said support.

18. In a grinding machine, the combination of a grind- A ing wheel support, means for reciprocating said support, a

lit at the end of the stroke of the support.

21. In a grinding machine, the combination of a movable grinding wheel support, means for moving said support, adjustable means for disconnecting the moving means from a source of power, and means mounted to move with said support for engaging -the disconnecting means 22. In a grinding machine, the combinatiion of a movable grinding wheelA support, means for reciprocating said support, means operable for disconnecting the reciprocating means from a source of power, and a striker pivotally mounted on the support for engaging the disconnecting means and operating it.

23. A grinding machine having means for moving a support for the grinding element and automatic stopping device therefor comprising a striker pivotally mounted on the support. l

24. A stopping device for the traverse of a grinding wheel consisting of a pivoted striker adapted to be held both in operative and in inoperative position by gravity.

25. A stopping device for the traverse of a grinding wheel comprising a bracket, and a striker pivoted thereon at a point above the bracket and beyond the end thereof, whereby the striker will be held by gravity in substantially upright 'position by its lower end engaging the end of the bracket, and whereby it will rest'by gravity in substantially horizontal position on the bracket when turned in such position. 4

26. In a grinding machine, the combination of a pair of pil19w-blocks, each having bearings thereon for an axle or the like. a right and left-hand screw engaging the two pillow-blocks, stationary means for supporting said screw, a ratchet wheel on said screw, and means for turning said ratchet-Wheel to operate the screw and simultaneously adjust the two pillow-blocks.

27. In a grinding machine, the combination of a pair of movable grinding wheel supports, means for simultaneously reciprocating said supports, means for rotating the grinding wheels on both supports, a counter-shaft, and

Y a plurality of means on the counter-shaft for operating both reciprocating means and both rotating means.

28. In a grinding machine, the combination of a plurality of m'ovable grinding wheel supports, means for simultaneously reciprocating said supports, means for rotating the-grinding wheels on said supports, means for rotating the work, a counter-shaft, and 'a plurality of means on the counter-'shaft for operating said reciprocating means and rotating means. A

29. In a grinding machine, the combination of a movable grinding wheel support, a grinding wheel thereon, means for rotating the work adjacent to said grindingwheel, a counter-shaft, means on the counter-shaft for rotating said wheel, and means on the counter-shaft for. operating the work rotating means, said work rotating means comprising a shaft, a gear rotatably mounted on the shaft and having a clutch section thereon, a clutch section slidably operated on the shaft, means for operating the sliding clutch section, a worm on said shaft, a worm- Wheel engaging the worm, and a work drive operated by said worm wheel.

30. In a grinding machine, the combination of a workdrive standhaving an open topped bearing, a rotary element supported by said bearing and having ways, au

. equalizing plate mounted to slide in said ways and provided with' ways at an angle to the first named ways, and

a work drive dog mounted to slide in the ways on the equalizing plate, said equalizing plate and Work drive dog being adapted to receive said rotary element.

31. In a grinding machine, the combination of a Workdrive-stand, having an open topped bearing thereon, a worm-wheel supported by said bearing, means for rotating said worm-Wheel, a horse-shoe shaped equaliaing plate mounted to slide in ways on said Worm-wheel, and a similar shaped work-drive dog mounted to slide in ways at an angle to the rst named Ways on the equalizing plate.

32. A grinding machine having a work-drive mechanism comprisinga rotatable element having Ways, an equalizing plate mounted in-said ways said plate having ways at an angle `to the nrst named Ways, a work-drive dog mounted n the last named Ways, and means lon the W0rk-drive dog for engaging an axle or the like and transmitting a motion of rotation thereto from the rotatable element.

33. A grinding machine having a Work-drive mechanism comprising :1 rotatable element having Ways, a horse-shoe shaped equalizing plate mounted in said ways, said plate having ways on the opposite side thereof at an angle to the first named Ways, a horse-shoe shaped Work-drive dog mounted on the last named ways, and adjustable elements on the work-drive dog for engaging an axle or the like and transmitting a motion of rotation thereto from the rotatable element.

34. A doating drive for a grinding machine comprising a horse-shoe shaped equalizing plate and a' horseshoe shaped work-drive dog slidably connected together, said dog being provided with adjustable means for engaging a shaft'or axle passing through the center of the plate and dog.

35. In a grinding` machine, the combination of a work drive stand having an open-topped bearing thereon, a rotatable element supported in said bearing, an equalizing plate movably supported by said element, a-work-drive dog on said platte and free to slide with respect thereto, means on the rotatable element'for preventing the entire displacement of'said dog, adjusting screws carried by said dog for holding the work, a pair oipillow blocks for supporting the work, and means mounted in said work drive stand and engaging the pillow-blocks for adjusting them.

36. In a grinding machine, the combination of a workdrive stand, a right and left-hand-screw mounted thereon, a pair of pillow-hlocks having screw-threads for the reception of saidI screw, means on the pillow-blocks for sup` y porting the work, and a floating drive on the work-drive stand for driving the work.

. Intestimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

f CHARLES H. NoR'roN.

Witnesses x ALBERT E. FM', HENRY H. LEPPER.

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