US1887025A - Exhaust apparatus for locomotive roundhouses - Google Patents

Description

Nov. 8, 1932u 1 1 KELLY 1,887,025

EXHAUST APPARATUS FOR LOCOMOTIVE ROUNDHOUSES Filed March 6, 1931 5 Sheets-Sheet l mma:

Hm (itmmqs Nov. 8, 1932. L. L. KELLY 1,887,025

EXHAUST APPARATUS FOR LOCOMOTIVE ROUNDHOUSES Nov. 8, 1932. L.. L. KELLY 1,887,025

EXHAUST APPARATUS FOR LOCOMOTVE RGUNDHOUSES Filed March 6, 1931 5 Sheets-Sheet 5 @fig-S5! @www Nov. 8, 1932. L* L.. KELLY 1,887,025

EXHAUST APPARATUS FOR LOGOMOTIVE ROUNDHOUSES Filed March 6, 1951 5 Slxeets--Sheetl 4 Nov. 8, 1932. L. L. KELLY EXHAUST APPARATUS FOR LOCOMOTIVE ROUNDHOUSES 193i 5 Sheets-Sheet 5 Filed March 6,

Patented' Nov. s, 1932 muri-:Dy STATES PATENT; OFFICE;

LOOMIS L; KELLY, DECEASED, LATE F ROANOKE, VIRGINIA, BY WILLIAM`M. 'BRODIFq ADHHNISTRATOR, OF BLACKSBURG, VIRGINIA Y EXHAUST APIVAR-ATUS FOR LOCOMOTIVE ROUNDHOUSES Application filed March 6, 1931. Serial No. 520,743.

The invention relates to exhaust apparatuses for locomotive roundhouses, and it has for its principal object the provision of rmproved means adapted to vbe associated with the stack of a locomotive for conveying ,the

exhaust gases thereof to the exterior of the roundhouse.

A primary feature of the invention consists in providing the apparatus with a conduit having upper and lower telescopically associated ducts, the upper duct being pivotally mounted adjacent the lroof of `the roundhouse and having a recessed portion in which is mounted a motor provided with a fan vfor inducing a draft in the conduit.

Anotherfeature of the invention consists in providing the exhaust apparatus with a conduit having upper and lower telescopically associated ducts, the upper duct having a recess in which is rigidly mounted a motor and being formed with laterally projecting means affording a pivotal support for the conduit, and a fan operatively connected to the motor for inducing `a draft in the conduit.

Another feature of the invention consists in providing the apparatus with a series of ducts, one of which is formed with a recess having a top wall extending transversely of the duct to which a motor may be rigidly secured, the motor being provided with a fan for inducing a draft in the conduit.

Another feature of the invention' consists in providing the apparatus with a series of ducts, one of said ducts having a cast metal section provided with means affording a pivotal support for the conduit, and a motor rigidly secured to the cast metal section and having afan for inducing a draft in the conduit.

A further feature of the invention consists in providing one of the telescoping ducts of the conduit with an improved packing ring for preventing air from leaking into the conduit.

A still further feature of the invention consists in providing improved means for operating the telescoping ducts of the conduit. l

Other and more specific features of the invention residing in advantageous forms, combinations and relations of parts will hereinafter appear and be pointed out in the claims.

In kthe drawings illustrating a preferred embodiment of the invention:

Figure 1 is a sectional view of a roundhouse showing the smoke exhaust apparatus in side elevation. a

Figure 2 is a view taken on the line 2 2, Figure 1. V a

Figure 3 is a viewy taken on the line 3 3, Figure 1.v 'n

Figure 4 is an enlarged vertical sectional view of the apparatus.

Figure 5 is an enlarged sectional view taken on the line 5 5, Figure 4.

Figure 6 is an enlarged sectional view taken on line 6 6, Figure 4.

Figure 7 is a view partly in section and partly in elevation of the upper portion of the exhaust apparatus, the sectional part of the figure being taken on the line 7 7, Figure 5.

Figures 8, 9 and 10 Vare sectional views taken on lines 8 8, 9 9 and 10 10, respectively, of Figure 4.

Figure 11 is a side elevational view of the lower portion of the exhaust apparatus, the View being at right angles to Figure 4.

Figure 12 is an enlarged elevational view of a portion of the exhaust apparatus illustrating in detail the operating arm.

Figure 13 is a view similar to Figure 12 but taken at right angles to that figure.

Figure 14 is a side elevational view of the cast metal motor housing.

Figure 15 is a front elevational view of the motor housing.

Figure 16 is a plan view of ring for the motor.

Figure 17 is a side elevational view of the supporting ring.

Figure 18 is a front elevational View of the supporting ring.

Figure 19 is an enlarged vertical sectional view of the conduit adjacent the adjoining ends of the telescoping ducts. y

Figure 2O is a diagrammatic plan view of the packing ring.

the supporting Figure 21 is an enlarged plan view of a portion of the packing ring illustrating in detail the construction of the connecting link.

Figure 22 is a side elevational view of the construction illustrated in Figure 21.

Figure 23 is an enlarged fragmentary view of the connecting link as viewed from the inner side thereof.

Figure 24 is an enlargedV sectional view taken on line 24-24, Figure 22.

Figures 25 and 26 are enlarged sectional views taken on lines 25-25 and 26-26, Figure 21.

Figure 27 is an enlarged plan of the link of the packing ring cooperable with the guide bar of lthe telescoping duct.

Referring more particularly to the drawings, Figure 1 indicates the roundhouse, which as is well known is provided with a plurality of stalls, into which locomotives are adapted to be run for the purpose of repairs. To convey exhaust gases from the locomotive to the exterior of the roundhouse while the locomotive is being repaired, each of the stalls, one of which is shown in Figure 1, is equipped with an apparatus adapted to be operatively associated with .the stack 2 of a locomotive diagrammatically illustrated and designated by the reference numeral 5.

The apparatus comprises a conduit having upper and lower telescopically associated ducts 4 and 5 respectively, and a duct 6 pivotally connected to the latter adjacent its lowerend. The conduit as a whole is pivotally mounted and its axis is at right angles to the center line of the track upon which the locomotive is adapted to move so that by swinging the conduit and properly manipulating itstelescoping ducts, it may readily be brought into registration with the locomotive stack. Disposed within the upper duct is a fan 7 for inducing a draft in the conduit, the fan being operatively connected to a motor 8 which is rigidly secured to the duct. Pivotally mounted within the upper portion of the duct 4 is a damper 93 for closing the conduit when the fan 7 is not in operation. The damper is preferably provided with a plurality of apertures 94 so that when it is closed and the apparatus is associated with a smoul dering locomotive, products of combustion such as smoke and other gases may pass through the conduit and be conducted to the exterior of the roundhouse. Although any suitable means may be employed for operating the damper it may advantageously be manually operated by a chain 95 which is arranged in convenient reach of an operator on the floor of the roundhouse and passes around a suitable wheel or sheave 96 mounted on ashaft 97 rigid with the damper.

In order that the exhaust gases may travel in substantially straight lines through the conduit, the ducts are preferably formed without elbows or bends, and the axis of rotation of the motor and fan is substantially parallel with the longitudinal axis of the ducts. To position the motor so that its axis will be in this relation, duct 4 is formed with a recessed portion 9 in which the motor is mounted. The portions of the duct above and below the recess are cylindrically shaped and the diameter of the portion above the recess,

in which the fan is disposed, is greater than the diameter of the portion below the recess. Although the axis of these cylindrical portions are parallel they are laterally offset instead of being coincident and the axis of rotation of the motor, and consequently of the fan, is coincident with the axis of the cylindrical portion above the recess. By this arrangement it will be perceived that the distance the rece-ss extends into the duct is less than would be the case if the axis of rotation of the motor was coincident with the cylindrical portion below the recess.

Although the upper duct 4 may be formed from a single piece of metal, for convenience in manufacture, it is preferably formed in three sections 10, 11 and 12, arranged in end to end relation and welded together. The upper and' lower sections 10 and 12 may advantageously be of sheet metal while the inl termediate section 11 to which the motor 8 is secured is preferably of cast metal. As may be seen from theV drawings the recess 9 is 'formed partly in the intermediate section 1.1 andv partly in the lower sheet 'metalsection 12. The portion of the recess in the cast metal section is formed with plane side walls, 13, a curved top wall 14 extending transversely of the duct and av curved end wall15, the axis of curvature of which is preferably coincident with the axis of rotation of the motor. The cast metal section 11 may be advantageously rigidified by a web portionv 15a integrally connecting the curved end wall 15 of the recess and the adjacent body portion. of thesection. The portion of the recess in the lower section 12 is formed with plane side walls 13 and with a curved end wall constituting a continuation ofthe end wall 15. The lower portion of the end wall preferably inclines downwardly and outwardly merging into the cylindrical portion of the lower. section. In order that the effective area of the duct will not be reduced by the recess the portions of section 12 adjacent the side walls of the recess are flared outwardly as indicated at 16. Although the lower portion of the cast metal section is irregularly shaped to conform to the upper portion of sheet metal section 12, the upper portion thereof is cylinorically shapedto conform tothe upper section 10.

So that the motor may be easily and con veniently supported within the recess it is preferably suspended from the curved top its iis

wallv 14 of the latter in spaced relation thereto. To support it in this relation a ring member 17 is employed which encircles the upper portion of the motorandis provided with portions 18 extending upwardly toward the top wall of the recess. apertured toreceive bolts 19 which extend through the top wall and have threaded engagement with a flange 20 form-ed integrally with the motor casing. Adjacent the side wall of the recess the top Wallis integrally formed with bosses 21 which are apertured to receive bolts 22 which extend through registering apertures formed in thering member and have threaded engagement with the 'flange 20. In this manner it willbe perceived that the motor is rigidly supported within the recess in spaced relation to the top wall thereof. To prevent overheatingof the motor the exterior walls of the recess are preferably covered with asbestos or other heat resisting material. Heat resisting material is also preferably interposed between the adjacent portions of the top wall and ringmember.

The top wall of the recess is formed with an opening 23 through which the motor shaft 24 extends. Rigidly mounted on the motor shaft is a collar 25 to which the hub 26 of the fan is rigidly secured by bolts 27. Bordering the opening 23 is an upstanding cylindrically shaped flange 28 formed integrally with the top wall of the recess and surrounding lthe motor shaft collar 25. Sullicient space intervenes between the collar and the flange so that cool air may be drawn into the duct from the recess so that the air surroundingvthe motor may be kept in-circulation and thereby prevent its overheating. Interposed between the hub 26 of the fan and the collar 25 is a circular plate 29 constituting a guard preventing rain and the like from dropping down through the opening 23 onto the motor. To prevent transmission of heat to the motor through the collar 25 other heat resisting material is preferably interposed as at 30 between the latter and the vrain guard 29.

The hub 26 of the fan is preferably formed with two circular plates 31 which are maintained in spaced relation by a plurality of thimbles or ferrules 32. Althoughv the hub may be cast as an integral structure it is preferred to form the plates and ferrules separately and thereafter secure them together by welding. rlhe blades of the fan are formed at their inner ends with portions 33 which extend between the plates 31 of the hub. These portions togetherwith other portions of the blades which are contiguous to the hub are preferably secured to the plates by welding. If desired, arcuate shaped liller members 34 may extend between the blades and be securedthereto and to the plates.

To afford convenient means for pivotally supporting the exhaust conduit the cast met- These portions arel al section 11 '1s integrally formed with oppositely projecting trunnions 35 respectively journaledfin bearings 36. The bearings are bolted or otherwise secured to angle members 37 connected to adjoining portions of the roof structure of the roundhouse. The upper end of the duct 4 extends upwardly into a flue or chimney pipe 38 mounted in the roundhouse roof. The diameter of the pipe 38 is considerably greater than the diameter of the upper portion of duct 4 so that the latter may be free to pivot or swing about the trunnions 35.

rlhe duct 5 which telescopes within the lower portion of the duct 4 is preferably supported by a counterweight 39 connected to the duct by any suitable flexible means 40 such as ropes or cables, the flexible means being secured to opposite sides of the duct by bracket members 41. The flexible means extend upwardly on opposite sides of the conduit and are trained over pulleys or sheaves 42, the axes of rotations of which are coincident with the pivotal axis of the conduit. From this point the means extends rearwardly to a point 43 where it continues as a ,single rope, chain or cable tra-ined over a second V pulley or sheave 44. The counterweight 39 is of sullieient weight to maintain the duct 4 in an elevated or raised position. Although any suitable means may be employed for raising the counterweight 39 to permit the duct to move downwardly it is preferred to employ fluid pressure means comprising an air cylinder 45, a piston 46 and a lever 47. At one end the lever is pivotally connected to an arm 48 rigidly secured to an adjacent portion of the roundhouse while at its other end it is connected at the point 43 t'o the flexible means 40. The position of the lever when the duct-5 is supported in elevated position by the counterweight 39 is indicated by a dotted line in Figure 3. Upon the admission of air to the cylinder 45 the piston is caused to move outwardly rotating the lever 47 about its pivotal axis thus raising the counterweight and permitting the duct to move downwardly. By employing luid pressure means to lower the telescoping duct 4 instead of to raise it as is usually the case it will be appreciated that should the air supply be interrupted for any reason such as would 'occur from a leak in the air line or a failure of the air compressor the duct instead of dropping and thereby causing possible damage to the locomotive will be automatically drawn upwardly by the counterweight.

Adjacent its lower end the duc-t 5 changes from cylindrical shape in cross section to rectangular shape. The duct 6 which is pivotally connected to duct 5 by bolts 49 is provided of walls of duct 6 parallel with its pivotal axis are cylindrically curved while the other pair of walls are disposed in substantially vertical planes. The plate port-ion 50 is formed with an opening 52, preferably circular, adapted to register with the stack of the locomotive when the plate contacts with the upper peripheral edge of kthe locomotive stack. lt will be appreciated that if the locomotive is moved when in operative association with the conduit, the ducts thereof will automatically adj ust themselves. To prevent the accidental disengagement of the exhaust apparatus from the stack when the locomotive is being moved the plate portion 50 of the conduit 6 is provided at its outer edge with a depending flange 53 and adjacent its inner edge with depending lugs 53. The lugs and flange are arranged with respect to each other so that the former will extend inside of the locomotive stack while the latter will be disposed on the outside thereof.

ln order that the conduit as a whole may be conveniently7 swung about its pivotal axis to be initially brought into registration with the locomotive stack the conduit may be provided with an arm- 54. So that the arm may be supported out of the way when not in use it is preferably pivotally connected to the conduit adjacent the lower end of the duct 4 and it is connected to a counterweight 55 by a flexible rope, chain or cable 56. Then in operative position the arm is disposed between spaced portions 57 of brackets 58 secured t-o opposite sides of duct 4. To prevent spreading of the portions 57 they are connected by being welded to a bar 59 which extends upwardly for attachment to the duct 4 and may be conveniently fashioned to form a pivotal support for the operating arm 54. The portion of the bar 59 interposed between the spaced portions 57 of the brackets not only serves to prevent the latter from spreading but also serves asa stop limiting movement of the arm 54, toward the conduit. As it is necessary that the ducts be telescopically moved at the same time that the conduit is swung as a whole about its pivotal support to bring the exhaust apparatus into opera-tive association with the locomotive stack it is desirable that the fluid pressure means for operating the telescoping duct be under the control of the operator manipulating the arm 54. For this rea-son a pipe 60 leading from the source of fluid supply diagrammatically illustrated at 6l in Figure 3, extends down the duct 4 and is flexibly connected at 62 to a pipe 63 disposed within the arm 54, the pipe 63 terminating adjacent the lower end of the arm. Extending upwardly in the arm 54 from adjacent the lower end of the pipe G3 and connected to the latter by a three way valve 64 is a pipe 65; This pipe is flexibly connected at 66 to a pipe 67 which leads to the air cylinder 45. By positioning the three way valve 64 f0r controlling 'the admission and exhaust of air to and from the cylinder 45 on the operating arm 54 it will'be perceived that the movement of the telescoping duct 5 may be easily controlled by the operator. As it is also desirable that the motor 8 be under the control of the operator an electrical switch for starting and stopping the niotor is also preferably mounted on the operating arm 54 adjacent its lower end. Y

To prevent air from leaking into the tubes between the telescopingducts a packing ring 69 is mounted on duct 4 in a housing 70 formed on the latter at its lower end. The housing is formed by ring members 71 between which the lower end of duct 4 is disposed and an outer ring member 72. These members are connected to each other and to the duct by any suitable means such as screws 73 and the outer ring 72 is formed with an inwardly projecting flange 74 spaced downwardly a suflicient distance from the lower ends of the ring members 7l and duct 4 to afford a recess or housing in which the packing rng 69 is mounted.

The packing ring comprises a plurality of arcuate shaped links 75, each of which is bifurcated at its ends to provide slots 76 for receiving relatively short links 77 by which, through the intermediacy of rivets 7 8, the links are flexibly connected. One of he links designated 79 is formed in two slidable sections 8O and 8l respectively, for permitting the links to automatically adjust themselves to the exterior surface of duct 5 to compensate for variations in the latter. The section 8O is of channel shape having a web portion 82 and outwardly extending flanges or legs 83. Adjacent one of its ends a filler member S4 is interposed between the flanges 83 of the channel member. One end of the filler is bifurcated to provide a slot into which the adjacent connecting link 77 extends. The other section 8l of the section link 79 is formed with a tongue or forward extension 85 which extends between the flanges 83 of the channel. The tongue 85 is connected tothe filler block S4 by a tension spring 86 which is disposed within the channel section. The portion of the web 82 of the channel adjacent the section Sl terminates short of the outer ends of the flanges 83 so that a portion of the tongue S5 may engage the exterior surface of the duct 5. Section 8l may be advantageously provided with a plate portion 87 secured thereto by rivets 88 adapted to overlap and engage the outer edges of recessed portions 89, of the flanges 83.

Rigidly secured to duct 5 and extending upwardly into the. lower portion of duct 4 is a guide bar 90. To permit the guide bar to extend on opposite sides of the packing ring one of the links of the latter designated 91 lll) is formed with a recessed portion 92. This construction it will be perceived prevents the packing ring from moving circumferentially v of the duct 5.

From the foregoing it will be appreciated that there is provided simple andreliable means which may be easily and conveniently broughtfinto operative association with the stack of a locomotive for conveying theexhaustgases from the latter to the exterior of the roundhouse.

What is claimed is.: v y

1. In an exhaust apparatus for a locomotive roundhouse, a conduit comprising upper and lower telescopically associated ducts, the upper duct being ypivotally mounted adjacent the roof of the roundhouse and having a recessed portion, a motor disposed within said recessed portion, and a fan operatively connected to said motor and disposed within said conduit.

2. In an exhaust apparatus for a locoe motive roundhouse, a conduit comprisingy upper and lower telescopically associated ducts, said upper duct having a recessed portion, a motor rigidly mounted within said recessed portion, a fan operatively connected to said motor and disposed within said upper duct, the latter being integrally formed wit-h laterally projecting trunni ons, and means cooperable with said trunnions for pivotally supporting said conduit. f

3. In an exhaust apparatus for a locomotive roundhouse, a conduit comprising a. plurality of ducts, one of said ducts being provided with a recessed portion, a motor disposed within said recessed portion and rigidly secured to one of said ducts, and means rigid with said last-named duct for pivot-ally supporting said conduit.

4. An exhaust apparatus for a locomotive yroundhouse comprising a series of ducts, one

of said duct-s having a recessed portion pro vided with a top wall, a motor disposed within said recessed portion and rigidly secured to said top wall, and a fan operatively connected to said motor for inducing a draft in said ducts. 5. An exhaust apparatus for ay locomotive roundhouse comprising a series of ducts, one of said ducts having a recessed portion provided with a top wall extending transversely of the duct, a motor disposed within said recess and rigidly secured to said top wall, kand a fan operatively connected to said motor for inducing a draft in said ducts.

6. An exhaust apparatus for a locomotive roundhouse comprising a series of ducts, one of said ducts being provided-with a recess,

'- said recess having side wall portions substantially parallel with the longitudinal axis of the duct and an arched top wall extending transversely of the latter, a motor disposed within said recess and rigidly secured to said top wall, and a fan operatively connected to said motor'for inducing a draft in said ducts. Y l

`7. An exhaust apparatus for a locomotive roundhouse comprising a series of ducts, one of said ducts having a recess, said recess having plane side wall portions, a curved end wall, and a top wall extending transversely of the duct, and a motor disposed within said recess and rigidly secured to said top wall, and afan operatively connected to said motor for inducing a draft insaid ducts.

8. An'exhaust apparatus for a locomotive roundhouse comprising a series of ducts, one ofsaid ducts having a recessed portionl provided with a top wall extending transversely of the kduct and with a substantially cylindrical end wall, the upper portion of the duct being substantially cylindrical and the axis of `curvature of said upper portion being substantially coincident with the axis of curvature of the said end wall.

9. An exhaust apparatus for a locomotive roundhouse comprising a series of ducts, one of said ducts being provided with a recessed portion having atop wall extending transversely of the duct, said top wallloeing provided With an opening bordered by an upstanding Harige, and a motor disposed within said recess and rigidly secured to said top Wall, the motor having a. shaft extending through the opening in the top wall, and a fan rigid with said shaft for inducing a draft in said ducts.

10. An exhaust apparatus for a locomotive roundhouse comprlsing a series of ducts, one

of said ducts having a recessed portion provided with a curved top wall extending transversely of the duct, said top wall having an opening and being integrally formed with an upstanding flange bordering said openingga motor disposed Within said recess and rigidly secured to the top wall thereof, said motor having a shaft extending through the opening in the'top wall, and a fan rigidly connected to said motor for inducing a draft..

in said ducts.

11. An exhaust apparatus for a locomotive roundhouse comprising a series of ducts, one of said ducts having a recessed portion provided with a top wall extending transverselyV of the duct, a motor disposed within said recess and having a fan for inducing a draft in said ducts, and means for rigidly securing the motor to the top wall of the recess involving a member encircling the motor.

12. An exhaust apparatus for a locomotive roundhouse comprising a series of ducts, one of said ducts having a recessed portion provided with a top wall extending transversely of the-duct, a motor disposed within the recess and having a fan for inducing a draft in said ducts, and means for securing said motor to the top wall of the recess in spaced relation thereto.

1 3. An exhaust apparatus for a locomotive roundhouse comprising a series of ducts, one of said ducts having a recessed portion provided with a top wall, a motor disposed with-V in said recess, a fan operatively connected to said motor for inducing a draft 1n said ducts, a ring member encircling said motor and having upwardly extending apertured porsaid motor vfor inducing a draft in said ducts,

the top wall of the recess having downwardly extending apertured portions, and means passingthrough said portions for securing the motor to the top wall of the recess.

15. An exhaust apparatus for a locomotive roundhouse comprising a series of ducts, one of said ducts having a recessed portion providedwith a curved top wall, a motor disposed within said recessed portion, the axis of curvature of said wall extending transversely of the conduit, a ring member encircling the upper portion of the motor, said ring member having upwardly extending apertured portions spaced longitudinally of the recess and said top wall having downwardly extending` apertured bosses disposed adjacent the sides of the recess, and means passing kthrough said apertured portions and bosses for securing the motor to the top wall of the recess.

16. An exhaust apparatusk for a locomotive roundhouse comprising a series of ducts, one of said ducts having a recessed portion provided witli a curved end wall, the axis of curvature of the lower portion of said end wall being inclined to the longitudinal axis of the conduit and the axis of the curvature of the upper portion of the end wall being substantially parallel with the said axis ofthe duct, a motor disposed within said recess, and a ian connected to said motor for inducing a draft in said ducts.

17. An exhaust apparatus for alocomotive roundhouse comprising a series of ducts, one of said ducts having upper and lower portions the longitudinalaxes of which are substantially parallel and laterally offset, and a fan disposed within said upper portion of the duct, the axis of rotation of said fan being substantially parallel to the longitudinal axes of said ducts'.

18. An exhaust apparatus for a locomotive roundhouse comprising series of ducts, one of said ducts havingupper and lower portions the longitudinal axes of which are substantially parallel and laterally ollset, and a .tan disposed within said upper portion, the axis ot rotation of said fan being parallel to inw-,025

on said lower portion, and a fan operatively connected to said motor and disposed within said upper portion of the duct.

20. An exhaust apparatus for a locomotive roundhouse comprising a series of ducts, one

of said ducts having a cast metal section prof vided with a recessed portion, said recessed portion having a top wall extending transversely of the section, a motor dispose-d within said rec-ess and rigidly secured to the top wall thereof, and aV fan operatively connected to said motor and disposed within one of said ducts.

21. An exhaust apparatus for a locomotive roundhouse comprising a series otducts depending from adjacent the root of the round-M house, one of said ducts havin-g a cast metal section provided with a recessed `portion having a topwall extending transversely or' the section, a motor disposed within said recesseft ortion and rividl secured to said ton wall a` fan operatively connected to said motor for inducing a draft in said ducts, said-section being provided with laterally projecting trunnions, and means cooperable with said trunnions for pivotally supporting said series of ducts.

22. An exhaust apparatus for a locomotive roundhouse comprising a conduit having ,upper and lower telescopically associated ducts, a counterweight connected to said lower duct for maintaining the latter in an elevated position, and means for actuating saidcounterweight to permit said lower ductto gravitate downwardly.

23. An exhaust apparatus for a locomotive roundhouse comprising a conduit havin upper and lower telescopically associated ducts. a counterweight liexibly connected to said lower duct for maintaining the latter in an elevated position, and means for raising said counterweight to permit the duct to move downwardly.

24. An exhaust apparatus for a locomotive roundhouse comprising a conduit having upper and lower telescopically associa-ted ducts, mechanism Jfor maintaining said lower duct in an elevated position involving a counterweight and flexible means connect-ing the latter to the duct, and mechanism for lowering said duct comprising a movable lever connected to said flexible means and a device for actuating the lever.

' 25. An exhaust apparatus for a locomotive roundhouse comprising a pivotally mounted conduit having upper and lower telescopica-lly associated ducts, a counterweight flexibly connected to the lower duct for maintaining the latter in an elevate-d position, and fluid pressure means for actuating the counterweight to permit said lower duct to move downwardly.

26. An exhaust apparatus for a locomotive roundhouse comprising a pivotally mounted duct having a telescoping section, said section being cylindrical adjacent its upper portion and rectangular adjacent its lower portion, and a member pivotally mounted within the lower portion of said section, said member having two curved side walls, the axes oi' said side walls being substantially parallel with the pivotal axis of said member.

27. An exhaust apparatus for a locomotive roundhouse comprising a pivotally mounted duct having a telescoping section, said section being cylindrical adjacent its upper portion and rectangular adjacent its lower portion, and a member pivotally connected to said section adjacent its lower portion, said member having a plate portion and rectangularly arranged wall portions extending upwardly therefrom into said section, one pair of said wall portions being cylindrically curved, the axes of curvature of said cylindrical wall portions being coincident with the pivotal axis of said member.

28. An exhaust apparatus for a locomotive roundhouse comprising a plurality of telescoping ducts, one of said ducts being pro-` vided with a packing ring encircling another of said ducts, said packing ring comprising a plurality of pivotally connected links, one of said links having relatively slidable see` tions, and a tension spring connecting said sections.

29. An exhaust apparatus for a locomotive roundhouse comprising a plurality of telescoping ducts, one of said ducts being provided with a packing ring encircling another of said ducts, said packing ring comprising a plurality of pivotally connected, links, one of said links having relatively slidable sections, one of said sections being of channel shape and having a web and outwardly proj ecting flanges, the other of said sections having al portion interposed between said flanges, and a tension spring disposed within said channel for connecting said sections.

30. An exhaust apparatus for a locomotive roundhouse comprising a plurality of telescoping ducts, one of said ducts being provided with a packing ring encircling another of said ducts, said packing ring comprising a plurality of pivotally connected links one of which is provided with relatively slidable sections, one of said sections being of channel shape and having a web and outwardly projecting flanges, said web terminating short of said flanges adjacent one end of said channel section, the other of said sections having a portion interposed between said flanges, and

roundhouse comprising a plurality of telescoping ducts, one of said ducts being provided with a packing ring encircling another of said ducts, said packing ring comprising a plurality of pivotally connected links one of which is provided with relatively slidable sections, one of said sections being of channel shape and having a web andl outwardly projecting flanges, the other of said sections having a portion interposed between said flanges and a portion overlapping the outer edges of said flanges, and a tension spring connecting said sections.

32. An exhaust apparatus for a locomotive roundhouse comprising a plurality of ducts, one of said ducts being vadapted to telescope within another of said ducts, said last-nained duct being provided with a packing ring encircling said telescoping duct, said packing ring comprising a plurality of pivotally connected links, and a guide bar rigid with said telescoping duct, one of said links being provided with a recessed portion for receiving said guide bar.

33. An exhaust apparatus for a locomotive roundhouse comprising a conduit pivotally mounted adjacent the roof of the roundhouse, and means for manually pivoting said conduit comprising an arm pivotally mounted on the latter, the pivotal axis of said arm being at an angle to the pivotal axis of the conduit, and a bracket device secured to said conduit and having spaced portions, said arm being adapted to be disposed between said spaced portions.

34:. An exliaustlapparatus for a locomotive roundhouse comprising a conduit pivotally mounted adjacent the roof of the roundhouse, and means for manually pivoting said conduit comprising an arm pivotaly mounted on the latter, and a counterweight flexibly attached to said' arm for normally maintaining it in an elevated position.

85. An exhaust apparatus for a locomotive roundhouse comprising a conduit having `telescoping ducts, a fan and motor device for iiiducing a draft in said conduit, fluid pressure nieans permitting telescoping movement of said ducts, anarm pivotally mounted on said conduit, and means mounted on said arm for controlling the operation of said motor and said fluid pressure means.

WILLIAM M. BRODIE. Administrator of the Estate of Loomis L.

Kelly, Deceased.

.l fill ltlfi

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