US347212A

US347212A - Apparatus for stretching and drying cloth

Info

Publication number: US347212A
Authority: US
Publication date: 1886-08-10
Anticipated expiration: 1903-08-10

Description

(No Model.) 6 Sheets-Sheet 1.

J. H. VARNEY.

APPARATUS FOR STRBTOHING AND DRYING CLOTH.

L Patented Aug. 10, 1886.

INVEN TOR ATTORNEYS.

6 Sheets-Sheet 2.

(No Model.)

J. H. VARNE-Y.

APPARATUS FOR STRETGHING AND DRYING CLOTH.

Patented Aug. 10, 1886.

INVENTOR:

WITNESSES E'BY (No Model.) 6 Sheets-Sheet 3. J. H. VARNEY.

APPARATUS FOR STRETGHING AND DRYING CLOTH. No. 347,212.

Patented Aug. 1'0, 1886.

ATTORNEYS.

INVENTOR N. m Q -B A E a .N E N W a NN AWN w 6 ShetsSheet 4.

(No Model.)

J. H. VARNEY. APPARATUS FOR STRBTGHING AND DRYING GLOTH.- No. 347212 Patented Aug. 10, 1886.

DIVENTOR WITNESSES l ATTORNEYS.

(No Model.) 6 Sheets-Sheet 5. J. H. VARNEY.

v APPARATUS FOR STRETOHING AND DRYING CLOTH.

Patented Au 10, 1886.

INVENTOR ATTORNEYS.

WITNESSES 6 t e e h s m w .n s 6 T B N R A V J a d o M 0 APPARATUS FOR STRETGHING AND DRYING CLOTH- gatented Aug. 10

ATTORNEYS.

WITNESSES UNITED STATES PATENT OFFICE.

JOHN HENltY VARNEY, OF HALLOWELL, MAINE.

APPARATUS FOR STRETCHING A ND DRYINGCLOTH.

aPncIPrcA'rIoN forming part of Letters Patent No. 347,212, dated August 10,1836.

Application filed July 16, 1884.

To all whom it may concern.-

Be it known that I, JOHN HENRY VARNEY,

of Hallowel], in the county of Kennebec and ing and drying processes and to give a better stretch and finish to the fabrics.

The invention consists in constructions and combinations of parts of the apparatus, all as hereinafter fully described and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similarletters of reference indicate corresponding parts in all the figures.

'Figure 1 represents my improved apparatus for stretching and drying cloth, and shows in vertical section the building in which such apparatus is placed. Fig. 2 is a plan view of the apparatus with the building in horizontal section. Fig. 3isalongitudinal sectional elevation of'thestretching and drying machine,

partly broken away. Fig. 4 is a sectional ele-' vation of one end of the outside shaft and one of the gear-wheels by which the hook-chain and chain-wheel.

wheels are driven at the back end of the machine. Fig. 5isasecti0nal elevation ontheline 1 1, Fig; 4. Fig. 6 is a side view of the drive g ar-wheel and end view of the outside shaft.

Fig. 7 is a sectional elevation of one of the telescoping cloth'guide rollers. Fig. 8 is a chine, parts being broken away. Figs. 9,10, and 11 areenlarged detail views of one of the clothcarrying hooked chains and guides therefor. Fig. 12 is an enlarged longitudinal section of the cloth-drying chamber, and shows also inside elevationthe hooked-chaiu guides Fig. 13 is'a transverse section of the stretcher A, taken on the line 2 2 of Fig. 3, and shows also in rear elevation the front bearer of. the stretcher and the apron over which the cloth passes, also the screwshaft and hand-wheels for operating the side bars. Fig. 14 isa back end view of the drier. Fig. 15 is a transverse sectional elevation on line 3 3 of Fig. 3, the wheels J and J and Serial No. 137,847. (No model.)

shaftj being also shown in elevation. Fig. 16 is a transverse sectional elevation on the line 4. 4 of Fig. 3, bearerL, shaft N, and wheelsP and rollers U U being in elevation.

The general arrangement of the cloth stretching and drying apparatus which I employ for economically heating the air and conducting it to the cloth-drying chamber of the machine is illustrated in Figs. 1 and 2 of the drawings, in which the letters A B indicate the stretching and drying machine, which is placed in a close room, a, which connects by a passage, b, with the close room 0, in which the air-forcing apparatus or blower O and the air-heater D are placed. I show the engine E, for driving the blower O, and the engine F, for driving the machine A B, located in a room, (1, below the rooms and passage a b 0; but the engines may be arranged on the same level, if desired.

The exhaust-steam from the engines E F is.

conducted through a pipe, E, to the air-heater D, said pipe E preferably extending nearly to the bottom of the heater, which contains the coils E" of pipe, through which the air is forced by the blower O on its way to the drier. A pipe, E connects the outlet of the blower with the coils E which in turn connect by a pipe, E, with the back end of the drier in 'a manner hereinafter more fully explained.

F is the outlet-pipe for the exhaust-steam from .the heater D, which pipe may be valved to control the escape of the steam after it has risen through the water D in the heater, and so as to control the temperature of the airpipes and the air passing through them to the drier to any desired degree for the best drying eflect on the fabric.

. Between the rooms a c, and next the passage b, I arrange a room, a, for the workmen to'enter for protection from the high temperature prevailing in the machine and heater rooms. The heated air, after passing through the drier B of the machine, escapes at f to the room a with the steam or Vapor which has passed from-the fabric, and I provide along the close rooms and passage a b c a series of windows, a, or other ventilators, which may IOO to be opened sufficiently to interfere materially with the passage of the heated air from the drier back to the blower. It will be seen that the air discharged from the drying-chamber B at a temperature considerably higher than the outside atmospheric air is drawn along the rooms and passage a b c by and intothe blower O, which passes the air through the heater and back again to and through the drying-chamber, the heated air being used over and over again in a continuous circuit, whereby much greater economy in heating the air is attained than would be possible by leading the cool outside air to the blower and heater, and by using the exhaust-steam from the engines E F to reheat the air in circuit a greater 7 economy of fuel is secured than would be attained by passing live steam direct from a boiler to the heater. heated air to a very large extent enables the exhaust-steam to keep the air in circuitat a sufliciently high temperature for effective drying action on the cloth.

I particularly describe the cloth stretching and drying machine as follows: The cloth or fabric, G, to be stretched and dried is supported in a bolt, as at g,.l1p0n standard G, at the front end of the machine, and after passing through the machine it is wound in a bolt or roll, 9', held on standards G at the back end of the machine. The roll is wound by a belt passing from a pulley on the shaft of the bolt 9 to a pulley, R", on the shaft-R. The cloth passes from the bolt 9 down to and beneath a guideroller, G", held to revolve in standards fixed to the door, and thence the cloth passes up to and over a convex apron or plate, H, which is supported rigidly at the front end of the machine, and in its passage to and over the apron the cloth is stretched lengthwise slightly by the pull on it in unwinding before reaching the endless chains I 1, which are arranged along each side of the machine, and have tenter-hooks i, on which the cloth G is caught by its selvages for being carried through the machine as the chainwheels are revolved by gearing hereinafter described. The shaft of the bolt 9 has a frictionwheel, 9, secured to it,and a weighted brake lever, 9 pivoted to an arm, G, projecting from one of the standards G, bears on this friction-wheel to form a tension device and allow of the fabric being properly stretched.

The side bars,A A,of the front section, A,

of the machine are hinged, to the rear section or drier, B, on strong pins, as at B, allowing the opposite side bars,A A, of section A'to be swung bodily in horizontal plane on their support, which consists of a suitable frame or bearer, A, having legs a a",which rest on the floor or on a metal wear-plate,a,h'eld thereon, and having also a suit-able track or way, a, along its upper edge,on which rollers a journaled to feet a fixedto each side bar, A, may move transversely of the machine for bringing the front or free ends of the bars A A nearer to or farther from each other, according to the desired sidewise stretch the cloth is to receive.

The reuse of the same.

screw-shaft, A, having right and left threads fitted, respectively, into boxes A A, which are swiveled on vertically-ranging pins orjournals fitted loosely to boxes a" 0., held to each of the side bars, A, through which bars the screw-shaft passes. The shaftisjournaled in boxes a a on the tops of the end standards of the bearer A, and has hand-wheels A at the ends, which serve to prevent end motion of the shaft, .and' to turn the shaft by for positioning thdside bars, A A, relatively to each other as desired. The swiveled boxes A allow the side bars, A A, of the section A to have an independent or reverse end motion, as the entire machine is oscillated endwise on pivots of bearers which support the clothdrying chamber B, as hereinafter described. The cloth-guide apron H is held rigidly by standards H, fixed to the floor, and so that the chain-wheels J J, journaled to the free ends of the side bars, A A, will move as closely as ma'y be to the edge h of the plate as the section A is shifted transversely-for catching the cloth on the tenter-hooksi of the chains 1' I, and as the bars A A are moved backward and forward as the drier is oscillated, as hereinafter described. The front chain-wheels, J J, (see Fig. 3,) are journaled on studs of arms a. a, fixed to the ends of the bars A A and the back chain-wheels, J J, (see Figs. 15 and 12,) are fixed to shaftsjj, which arejournaled in the opposite sides of the caseof the drying-chamber, or to plates j j, fixed'to thecase. (See Fig. 15.) Guideways Il are provided along the inside faces of the bars A A of the section A, and continue backward along the inner faces of the sides of the drying-chamber B, so as to support the upper andlower sides of the endless chains, the tenter-hooks i of the chains running along through face-slots of the guides, and projectin therefrom to hold the cloth.

make the cloth-drying chamber B in react-- angular box-like form and in two sections, B B", having sides b b, overlapping ends b b, and top andbottom parts overlapping each other so as to form a closed chamber adapted to be made wideror narroweqtoaccommodate different widths of fabric. Is'upport the see- .tional drier B, preferably by rollers K, upon the flanges l of the bearers L, which are sup ported on vertical pivots on the pedestals M, fixed to the floor. There may be as many of these pivoted bearers as desired, and each one has a right and left screw-shaft, N, fitted in threaded swiveled boxes 0, journalcd to brackets o 0, fixed to the opposite sides, b b, of the drier-sections, and the shafts have a handwheel, 1?, at each end, by which to turn them for contracting or expanding the case of the dryer, the arrangement of the screw-shafts N and theirswiveled boxes being substantially the same as that of the shaft A, beforede= scribed. It will be seen that the drier may be made wider-or narrower, as required, and

also is free to oscillate on the pedestals, and will carry the bearer'Ai 'and frame A with it, so that the sections A B of themachine may receive together a limited back and forth or reverse motion of their opposite sides, for

stretching the' cloth G as it is carried along by the endless chains I I. To give thisoscillating movement to the machine-sections A B, I connect the back bearer L, at one side of its pivot, by a rod, Q, with'an eccentric, Q, held on a'shaft, R, which is journaled in bearings r r of a yoke, S, and standard r, fixed to the floor, and carries a pulley, R, to receive a belt for driving it. The shaft It carries at the other end a bevel gear-wheel, R, which meshes with a bevel-gear, R, 6f a vertical shaft, S,

journaled in line with the pivots of the bearers L in the yoke S. The shaft S carries on its upper end a beveled gear, S, meshing with a bevel-gear, S, fixed upon a transverse shaft, T,which passes along the back end of the machine, through a strong bracket-arm, T, and revolves in the upper horizontal bearing, t, of the arm; The shaft T is supported, mainly, in, boxes '1 T ,whioh areswiveled to lugs t t, fixed to the sides b b of the drier-case sections B. B, andsaid lugs 15 t may be extensions of the plates jj, in which the shafts or gudgeons" of the chain-wheels J J are journaled The boxes T each have fixed lugs t t, which receive pins fixed to a strap or collar, T, which is held in arr-annular groove t of the hub of the adjacent driving-gear T, fitted to its shaft T by a feather or spline, t, so that the gear lwill revolve with the shaft and will be slid along the shaft with the case-section, to which it is attached, and thus hold the gears J and Talwaysin mesh for drivingthe cloth-carrying chains I I, irrespective of the width at which the drier-case may be set by the screw-shafts N. The lower vertical bear- I ing, t, of the arni T is mounted loosely on the shaft S, to swing thereon as the drier-case 0s cillates, and a collar, t*, is or may be fixed to the shaft T butside of the hearing if of the arm T. The cloth or fabric G enters the drier B through a horizontal slot, U, at the front end,

and proceeds with the endless chains I I to the back end of the drier, from which it passes forwardto and over a front guide-roller, U, thence down to and beneath a roller, U, directly below the'roller U, thence back again to leave the drier-case through a slot, U, thence to and around a roller, U, journaled in hearings to revolve outside the drier-case,

and up to the winding-bolt g in a dried-and.

' finished condition. it will be seen that the cloth travels along and through the drier in three continuous layers or webs, g g g. I

have fixed to the side sections of the driercase an upper partition cousisting'of overlapping plates V V. which come between the cloth layers 9 g, and tit closely to the front back-of-the partition and case.

end of the drier-case and stop short of its back end, to form an air-passage, f, at the I fix another partitio'n, consisting of overlapping plates 'V V closely to the back end of the drier-case, and extend the partition forward between the layers 9 of the cloth, but not quite to the frontend of the drier, so that an air-passage, f ,willbe formed thereat. The rollers U ,U are positioned, respectively, in the'drier-case so as to carry the web or layer g of cloth downward to release it from the inverted books 'i of the chains I, and to bring thlower layer, 9,- about midway between the lower partition-plates, V V and the bottom of the drier-case. Each of the rollers U U U consists of two telescoping sections, uu, having end shoulders coming at the inner faces of the sides of the drier-sections B B and end spindles, if, on which the nuts u are screwed so as to come outside .of the sections, so that as the sections arecont-racted or expanded, to narrow or widen the drier, the roller will likewise contract or expand. The overlapping-plate construction of the parti tions V Vallows them to be shifted on each other, so that neither the rollers nor partitions interfere with the adjustment of the driercase by the screws. Atthe same time the partitions subdivide the case, so as to confine the heated air in separate narrow or shallow assa e-s, through which the layer's'ofcloth travel, thereby insuring the thorough and quick drying of the fabrid. The pipe E, leading from the heater D, connects with a T- pipe or coupling, W, in or over the opposite heads or ends to of which the pipes X pass, and the pipes X bend upward, or so as to be connected with the opposite sides I) b of the drier-case at its back end, and to allow them to move in and out of the T-coupling WV as the cross sections are adjusted. I prefer to arrange the discharge ends am; of the opposite pipes X X, so that the air will be discharged against the side edges of the cloth, and so as to pass the both sides of the lower web or layer of cloth, asindicated in Figs. 3 and 12.

It will he noticed that the dry hot air first en- 'ters'the drier B next to where the cloth leaves thedrier, and thereby the ai rhas the best effect in giving the final dry-finish to the cloth, and thatthe air passes forward along and through the lower cloth layer. 1], thence up through thefront lower opening,f, and along and through the second cloth layer, and up through the opening f thence forward again along and through the opeuingf at the front of the drier into the room a, whence the air is drawn by the blower G into the heater D, to again be passed to the drier, as above described.

In practice I propose to cut away the ends of the partitions V V" a. little at the points when they would be liable to strike the case, and also provide room at the endsof the case itself to allow oscillation. If it should be found that the heated air escaped from between the two sections of the dryingfsection in a suflicient quantity to interfere with its serpentine course, a flexible flap could be used to close the spaces between said sections and at the cut-away portions of the partitions, and yet allow of adjustment and oscillation.

V V represent transverse flexible stri ps of metal, rubber, or othersuitable material, which are fastened at one edge to the ends of the drier-section and rest at, their frce'edges on the partitions at their cutaway ends. (See Figs. 3 and 12.)

in Fig. 8, B B represent flexible strips of sheet metal, which are secured at one edge to one section, and rest at the free edge on the other section, and thus close the joint between the two sections of the drier. The rollers U U" will have sufficient looseness in their bearings, so that they may move relatively with the drier-case. The supply-pipes X X oscillate at their points of connection with the ends a u of pipe NV.

As usually arranged, the guide apron or plate over which the cloth passes to be hooked onto the-traveling chains is held at some distance from the chains, so as to allow an attendant at each side of the cloth to hook its opposite selvages onto the opposite chains as the cloth is drawn into the machine, and the front section of the machine is supported on pivoted bearers, the same as the drier; hence I make special mention of my arrangement of the plate or apron H as extending quite closely to the hook-chains I, and of the arrangement of the section A to be moved transversely at the forward end independently of the endwise Y oscillation of the machine in stretching the cloth, as these features of construction allow the cloth to automatically be caught by the tenter-hooks i of the chains by shifting the forward end of the section A from side to-side,'

which maybe done by an attendant at one side ofthe machine, thus saving the labor of one man, and hooking the cloth to the opposite chains as evenly as with a man at each side. As the cloth G passes up over the apron H and the bearer A? is moved to the right hand of the longitudinal center of the machine, the left-hand hooksi will catch in the selvage of the cloth at that side, and as the bearer is moved to the left the right-hand hooks will engage the right-hand selvage of the cloth, and as the opposite hooks, which first catch the opposite sclvages of the cloth, are farther apart than the width of the cloth, as it passes from the bolt 9 the cloth will be stretched considerably in width as it enters the machine, after first having been stretched lengthwise in its passage from the bolt 9 and around the roller 9 and over the apron H, as hereinbefore described. As the cloth moves along the section A toward the drier, B it is stretched still more in width by the .divergence of the tenter-hook'chains carried by the side bars, A A. The section A may be moved transversely by direct hold of the hands on the bearer A or one of its hand-wheels; but

I prefer to use a slottedlever, Y, which is fulcrumed through its slot to a post at y, to act by its end y, connecting with the bearer A", for the purpose, and as shown in Fig. 2 the leverY may extend to the cool-room e, to be worked by an attendant therein.

It is obvious that by inclosing the traveling web of cloth in the drier B at the top and bottom as well as at the sides far less heat or air escapes without effective or continuous drying action on the cloth than in the ordinary cloth stretching and drying machines, wherein one side of the web of cloth is quite uncovered and the air forced between the two layers of fabric held by the endless-chain hooks blows directly through the fabric into the machine-room; hence my improved machine may, for this reason, also, be operated more economically.

The drawings represent the end parts of the opposite sections B B of the drying-chamber B fitted rather closely together, so as apparently to prevent their oscillating movement; but it will be understood that these reverse endwisc movements are but a few inches in extent, or comparatively slight; hence the overlapping end parts of the drier-sections B B may be set quite closely together, to prevent too free escape of heat from 'the drier, and at the same time admit of the free oscillating movement of the drier B and stretching-frame A, as herrinbefore described.

Having thus described my invention, What I claim as new, and desire to secure by Letters Patent, lS-

1. The combination, with a cloth-drying section and means for oscillating it, of a front section hinged at one end to one end of the drier-section and means for transversely oscillating the free end of said front section,

substantially as set forth.

2. The combination, with a cloth-drying section and means for oscillating it, of a front section having side bars hinged to the front end of the drying-section to oscillate with it, and means, substantially as described, for oscillating said front section independent of the drier, and cloth-carrying chains within said sections, substantially as set forth.

3. The combination, with the drier B and means for oscillating it, of the front section, A, having side bars, A A, hinged to the forward end of the drier to oscillate therewith, means, substantially as described, for oscillating said front section independent of the drier-section, and a transversely-movable bearer, A", supporting the forward end of the front section, substantially as set forth.

4. The combination, with the driersection B and means for oscillating it, of the front section, A, having side bars, A A, hinged to the drier at one end to move therewith, means for adjusting said side bars toward and from each other, a movable support for the free end of the front section, and cloth-carrying chains (mounted on said sections, substantially as set forth.

5. The combination, with the drier B and means for oscillating said drier, of the front section, A, having side bars, A, hinged to the drier at one end, the transversely-movable bearer A, supporting the opposite ends of said side bars, the swiveled boxes A, and the right-and-left screw-shaft A connecting the said sides through said swiveled boxes, substantially as set forth.

6. The combination, with the front section having side sections and means for adjusting said sections toward and from each other,-o'f

the endless cloth-carrying tenter-hook chains and a fixed apron or plate adjacent to the tenter-hooks at the front end of the front Sec: tion, substantially as set forth.

7. The combination, with the front section, A, having hinged side bars, A A, and means for adjusting said side bars, of the cloth-carrying chains mounted on said side bars, and fixed apron H, having its edge It adjacent to the said chains, substantially as set forth.

8. The cloth-drying section consisting of a case formed of'telesoopic sections and means for adjusting said sections toward and from each 'other,'in combination with the wheels" journaled in theepposite inner sides of said drier and cloth-carrying chains onsaid wheels, substantially as set forth.

. 9. The combination, with a cloth-drier consisting of a casing formed of telescopic sectlons and means for oscillating said sections, substantially as described, of wheelsjournaled at the opposite inner sides of the drier and cloth-carrying chains on said wheels, substantially as set forth.

10. The clothdrier comprising a case to inclose the fabric and means for oscillating said casingand adjustingitin-width, in combination with the cloth-carrying chains within the case, wheels supporting the same, and overlapping partitions'within the case, said partitions being secured alternately to opposite ends of the drier, thereby forming separate drying-chambers and a serpentine air-passage, substantially as set forth. Y r

11. The cloth-drier comprising a case to inclose the fabricand means for oscillating said case and adjusting it. in width, chain-wheels on opposite sides of the ease, and cloth carrying chains mounted thereon, in combination with the overlapping partitions forming a serpentine airpassage and drying chambers and the telescopic guide-rollers, whereby when the width of the case is adjusted that of the parti-' tions and rollers will also be adj usted, substantially as set forth.

12. The drier-case B, comprising two overlapping or'telescopic sections, B B, whereby the width of the same may be varied to suit different widths of fabric, substantially as set forth. I

13. The drier-case B, comprising the overlapping or telescopic sections B B, in combination with the cloth-carrying tenter-heok chains I Iwithin the case, substantially as set forth.

lapping or telescopic sections B B, in combi- 14. The drier-case B, comprising the overlapping ortclescopic sections B B, in combination with the pedestals M, bearers L, pivoted to the pedestals and supporting the driersections B B", means, substantially as described, f0; moving the sections in and out, and the tenter-hook chains, substantially as set forth.

15. The drier-case B, comprising the overlapping or telescopic sections B B and swiveled boxes 0, secured to said sections, in combination with the pedestals M, bearers L, supporting said case, and the right and left screw-shafts N, working in the swiveled boxes and adapted to operate the sections B B substantially as set forth.

16. The drier-case B, comprising the over- 5 nation with the cloth -carrying chains I I, overlapping partitions V V V V", fixed to the sides and alternately to the opposite ends of the drier to form a serpentine air-passage, the pivoted bearers L, supporting said sect-ions, and means, substantially as described, for adjusting said'sections, substantially as set forth.

1.7. The drier-case B, comprising the overlapping or telescopic sections ,B B", in combination with the cloth -carrying chains I I, overlapping partitions V V V V*, telescopic guide-rollers NfN the bearers L, supporting said sections, means, substantially as described, for swinging the bearers, and means for adj usting the sections, substantially as set forth. j i 18. The combination, with the driercase B, comprising. overlapping or telescopic sections B B and means for adjusting said sections, of the cloth-carrying chains and chain-wheels, boxes T T, swiveled to said sections, shaft T, journaled in said boxes, drive-wheels T T splined to the shaft to rotate with and slide thereon and connected-\vi th the swiveled boxes, and means for revolving said shaft, substantially as set forth.

19. The combination, with the section A, the drier-case B, to which said section is hinged and comprising the overlapping or telescopic sections B B", and the cloth-car.- rying chains, of the boxes T swiveled to the sections B B", means for oscillating. said sections, the shaft T, journaled in said boxes, the drive-wheels splined to the shaft to slide thereon and rotate therewith, and eonneetions between the drive-wheels and swiveled boxes, the shaftsj, the drive-wheels J thereon, drive-wheels T the chain-wheels J, the pivoted horizontally-turning bearers L, supporting the sections B 13*, the shaft R, the eccentric Q thereon, and the rod Q, connecting one of the bearers and said eccentric, and

mechanism for connecting and operating the shafts T R, substantially as set forth.

20. The combination, with the section A, of the horizontally-oscillating drier-ease B, to which said section Ais hinged, comprising overlapping or telescopic sections B B", the cloth-carrying chains, the boxes T, swiveled to the drier-sections, the shaft '1, journaled therein, the drive-wheels T, splined to 2i. The combination, with the drier-case the B, comprising the telescopic or overlapping shaft and connected to said swiveled boxes sections B B, of the telescopic hot-air pipes to be moved therewith on the shaft, drivewheels J their shaft j, the chain-wheels, shaft R, eccentric Q, Q, connecting the eccentric to a bearer,

forth.

the bearers L, the. rod the vertical shaft S, gears R R S S, the arm T, pivoted on shaft S, and the bearing t thereon for the shaft T, substantially as set connected thereto, whereby the width of the 1 the 1 case may be adjusted without interrupting the heat-supply, substantially asset forth.

JOHN 'ITENRY VARNEY.

Witnesses:

TREBY JOHNSON, A. W. HEDGE.