US2314463A - Refrigerator car - Google Patents

Description

March 23, 943

R. K. SCHWEBS REFRIGERATOR CAR Filed March 24, "1941 4 sheetssheet 1 Inval-rtm1 ROBERT KEN T SCHWEBS March 23, 1943. R. K. scHwEBs REFRIGERATOR CAR 4 sheets-sheet 2 Filed March 24, 1941 Ilm /l/ l/ l/ InVE lTtmr' ROBERT KENT SCHWEBS March 23, 943. R, K, SQHWEBS 293463 REFRIGERATOR CAR Filed March 24, 1941 4 Sheets-Sheet 3 figg@ fm.

lfm/Eutin? ROBERT KENT SCHWES R. K. SCI-WEBS REFRIGERATOR CAR Filed March 24,

March 23, i943.

InVEntm ROBERT KENT SCHWEBS Pitt :1P HEHE Patented Mar. 23, 1943 UNITED STATES PATENT OFFICE.

aEFaIGEnA'roa can Robert Kent seliwebs, Hortonviue, wis. p AAppia-amm Maren 24, 1941, serial No. 384,881

(o1. sz- 24) 18 Claims.

'I'his invention appertains to refrigerator freight cars and is an improvement over my prior Patents Nos. 2,136,894, 2,159,406, and 2,203,108, issued to me. respectively, on November 15, 1938, May 23, 1939, and June 4, 1940.

One of the primary objects of my present invention is the provision of a pump for delivering oil or like iluid under pressure to a turbine for operating air circulating fans disposed above the transverse partitions for the bunkers, with an oil tank or sump arranged below the turbine and above the pump for freely receiving the spent oil from the turbine and for maintaining a constant head of liquid on the pump.

Another salient object of my provide means for arranging the oil return tank or sump directly in the transverse partition for the bunkers. whereby the oil will be maintained substantially at a constant ,temperature and substantially unalected by outside conditions, so that the viscosity thereof will not materially change under diiferent climatic conditions, and thereby permit an even ilow of oil through the system at all times.

Another important object of the invention is the use of an automatic reversing pump for the oil, whereby, irrespective of the direction of rotation of the pump from the car wheels, the oil will ilow ln one direction to the turbine without the use ofa complicated valve system.

A further object of the invention is the provision of means for driving the pump in such a manner from the car wheels that such means can be lifted out of driving engagement with the car wheelsvto allow the convenient operation of the pump from an extraneous source of power when the ar 1S Standing still, so as to facilitate the precooling of the car.

A further salient object of the' invention is to provide means for operating a drive pulley belt for the pump directly fromA the periphery of one of the car wheels, with a cone pulley connected to the pump shaft over which the belt travels, means being provided for shifting the cone pulley in accordance with the speed of the freight car to bring about the delivery of a constant flow of oil from the pump to the turbine.

A further important object of my invention is to provide a iiexible drive shaft connection'between a wheel driven from the freight oar and the pump, whereby to effectively reduce end thrust and the like on the pump shaft bearings.

A still further object of my invention is the provision of sliding gates for controlling the openings above the transverse partition of the bunkers on each side of the air circulating fans, with invention is to' means for automaticallyoperating the gates in accordance with the rate of flow of the oil to the return tank or sump. l A

A still further object of my invention is'to provide means for permitting the shifting of the transverse partitions from their normal positions to form the ice bunkers to a position against the end Walls of the freight car when the bunkers are not needed and when it is desired to ll the entire car with freight.

With these and other objects in view, the invention consists in the novel construction, ar'

rangement, and formation of parts, as will be hereinafter more specically described, claimed, and illustrated in the accompanying drawings, in which drawings:

Figure 1 is a fragmentary, longitudinaL'sec-y tional view through a refrigerator freight car having my novel appliance incorporated therewith, and. showing one form of drive between the reversible pump and one of the car wheels.

Figure 2 is a fragmentary, transverse, sectional view through the freight car, taken on the line 2-2 of Figure 1, looking in the direction of the Figure 5 is a horizontal, sectional view taken on the line 5 5 of Figure 4, looking in the direction of the arrows.

Figure 6 is a fragmentary, detail, sectional view illustrating a still further form of operating the reversible pump from one of the car wheels.

Figure 7 is a fragmentary, detail, horizontal, sectional view taken on the line 'I-l of Figure 6, looking in the direction of the arrows.

Figure 8 is a detail, fragmentary, transverse, sectional view taken on the line 8-8 of Figure 6, looking in the direction of the arrows.

Figure 9 is a fragmentary, longitudinal, sectional view illustrating a still further modified form of drive for the pump.

Figure 10 is a fragmentary, longitudinal, sectional view taken through the body of the freight car on the line Ill-l 0 of Figure 12, looking in the direction of the arrows, illustrating the means employed for controlling the sliding gates in accordance with the rate of flow of the oil to the return tank or sump.

Figure 11 is a view similar to Figure 10, the

view being taken on the line ||I| of Figure 12, looking in the direction of the arrows.

Figure 12 is a fragmentary, transverse, sectional view through the body of a freight car, illustrating the means employed for automatically operating the gates.

Figure 13 is a fragmentary, transverse, sectional view through the body of a freight car, taken on a. smaller scale than Figures to 12, inclusive, and showing the use of a multiplicity of air circulating fans above the transverse partition.

Figure 14 is a View similar to Figure 13, but showing the use of an air circulating fan arranged on each side of the longitudinal center of the freight car.

Figure 15 is an enlarged, fragmentary, longitudinal, sectional View through the body of a freight car, illustrating one means for permitting the shifting of the transverse partition from its normal position to a position against one end wall of the car.

Figure 16 is a fragmentary, transverse, sectional view through the body of a freight car, taken on the same scale as Figures 13 and 14, and showing the use of several air circulating fans, with a bypass 'for the fluid leading to the return oil tank or sump.

Referring to the drawings in detail, wherein similar reference characters designate corresponding parts throughout the several views, the letter F generally indicates a refrigerator freight car, and the same embodies the customary insulated body having formed at each end thereof, by transverse partitions 2|, bunkers 22 for the reception of ice in the summertime or a heater in the wintertime. The ice or the heater, as the case may be, rests on a grating 23 arranged above the level of the car floor. The body of the car is, likewise, provided with a suitable perforated false bottom 24 on which the foodstuffs to be shipped are placed.

In accordance with my invention, I arrange above the partition 2| one or more air circulating fans 25. The fans`are adapted to draw air through the bunker and circulate the same over and down through the foodstuffs in the car. It is to be understood that one or more fans are provided at each end of the car, and the operation of the fans is such as to draw air from under the false bottom 24, through the bunker, and over the top of the foodstuffs. The air may be circulated in an opposite direction if so desired, that is, the air may be drawn from the top of the car and circulated down through the bunkers, and under the false bottom 24. In the Figures 1 and 2, I have shown three air circulating fans at each end of the car.

The transverse partitions 2| can be formed in any desired manner, but, as shown, the partitions include equidistantiy spaced uprights 26 extending from the top to the bottom of the car, and the spaces between the uprights are closed by inner and outer panels 21. These panels terminate short of the top of the car to provide air circulating spaces, and the air circulating fan.: are arranged within certain of these desired spaces above the panels. In Figures 1 and 2, a fan 25 is shown at the center of the car, and a fan 25 on each side of the car, and the spaces between the fans can be 'left open or closed, as may be preferred. Each fan 25 and 25' is adapteo to be driven by a turbine 28. If preferred, means can be provided for adjusting the position of the fan and the turbine, and, if so desired,

the same can be mounted within a suitable hood 29.

Each turbine 28 can include a rotor 30 having blades or buckets 3|, and this rotor can be mounted in a housing 32, which opens into the upper end of the liquid return tank or sump 33. There can be, if so desired, a return tank or sump for each turbine, and it is to be notedl that these return tanks or sumps are arranged within the transverse partition 2|. The tanks or sumps are hidden from view by the inner and outer panels 21 and the uprights 26. Hence, the tanks are also protected against blows. I lay particular stress upon the arrangement of the return tanks or sumps in the partitions, and the purpose of this arrangement will be more fully set forth.

Also, in accordance with my present invention, I provide novel means for supplying fluid under pressure to the turbines from an automatic reversible rotary pump 34. 'I'his automatic reversing pump is preferably of the type manufactured by the Tuthill Pump Company, of Chicago, Illinois, and this pump is of a well-known character and will not be described in detail, but it is to be noted that the same includes a stator casing 35 having an oil inlet 36 and an oil outlet 31. The pump shaft 38 extends outward from one end of the stator casing, and the pump shaft has connected directly therewith through the medium of a flexible coupling 39 (of the Lovejoy type) a drive shaft 40. The pump and the shafts are suspended by means of hangers 4| from a slide head 42, for a purpose which will be later set forth. At the present time, it is to be noted that the slide head 42 is mounted for'free sliding movement in a guidetrack 43 rigidly secured to the lower surface of the body of the freight car.

The shaft 40 has keyed or otherwise secured thereto between certain of the hangers 4| a coneshaped drive pulley 44. 'I'he cone 'pulley 44 is driven from a pulley belt 45, and this belt is, in turn, driven from one of the car wheels 46 of the freight car. The bel-t 45 is also trained over an idler pulley wheel 41 carried by a depending supporting bar 48. ' I'he pulley wheels 44 and 41 are arranged on opposite sides of the car wheel 46, and one run of the belt 45 engages the tread of the car wheel.

'I'he belt is normally held down against the tread of the car wheel by a spring 49. This spring can be housed within a cylinder 50, and the supporting rod 48 can have secured thereto a piston 5| for movement in the cylinder. The spring 49 engages one end of the cylinder and pushes down against the piston. Means can be provided for raising the pulley belt above the car Wheel 46 and out of driving contact therewith. 'I'his means can consist of a,rack 52 formed on one edge of the bar 43, and` a sector lever 53 can be employed for engaging the rack toA raise the bar. The lever can be mounted in any preferred manner from the car, such as by a bracket 54.

While I have shown the belt operated from the tread of the car wheel, it is to be understood that the same can be operated from any other moving part of the car truck.

When a car is standing still, it is highly desirable in some instances to pre-cool the car or the load contained therein, and, hence, by raising the pulley belt above the car wheel, the drive shaft 40 can be conveniently operated from some external source of power, such as a small internal combustion engine. To permit the connection of the shaft 40 with the power shaft of the engine, the shaft 40 can have keyed or otherwise secured thereto a drive pulley wheel 55.

Extending across the bottom of the freight car is a return oil header pipe 53, and this pipe has communicating therewith branch pipes 51, which lead to the bottoms of the oil return tanks or sumps 33. 'I'he return header pipe 56 1s, in turn, connected with the inlet 36 of the pump through the use of a flexible hose 53. The bottoms of the oil return tanks 33 can have arranged therein relatively large screens 53 to filter the oil prior to the return thereof to the pump. A feed header pipe 60 is arranged adjacent the turbines 23, and this feed header pipe 30 has communicating therewith nozzles 6I, which extend into the casings 3l of the turbines. The feed header pipe 63 can be connected with the oil outlet 31 of the pump 35 by a exible hose 62.

Referring to Figure 2, it can be seen that the nozzles 6| are so arranged that the oil under pressure will impinge against the blades of the rotors, and the spent oil will enter directly into the return tanks or sumps 33 from 'the turbine casings. Hence, there is no back pressure on the feed oil line, and as the sumps are arranged below the turbines, the separation of air from the oil in the tanks is facilitated, and the 'tanks and the casings for the turbines can be provided with air escape and inlet openings 33 and 63'. By this arrangement, a full head of oil on the pump is insured at all times. In order to prevent foaming of the oil and to assure the escape of air therefrom, oppositely inclined baille plates 33' can be arranged in top of the sumps33 below the turbine outlets.

As heretofore stated, only one end of the freight car is shown, and the return hose 58 and the feed hose 62 extend to both ends of the car. The feed hose 62 on opposite sides of the pump can carry hand-operated control valves 64, so that the iiow of oil to either or both ends of the car can be cut oli'.

I lay great stress on the arrangement of the oil return tanks or sumps 33 in the transverse partitions 21, as by this arrangement of parts, the oil is maintained substantially at an even temperature at all times, unaffected by outside climatic conditions. Thus, the consistency of the oil will remain substantially constant at all times.

From the description so far it can be seen that I have utilized an automatic reversible pump in my air circulating system, with novel means for operating the pump from a belt, which is maintained in driving contact with one of the car wheels.

As the pump is driven from a car wheel, it will be seen that the pump will be driven at different speeds according 'to the speed of travel of the freight car. Generally, it is advisable to drive the pump at a constant speed, irrespective of the speed of travel of the car, and I prefer to provide means for insuring the constant speed of rotation of the pump, irrespective of the speed of travel of the car. This can be accomplished by the use of a governor or some other suitable mechanism.

In Figures 1, 2, and 3, I have shown one form of means for accomplishing this purpose. The stator casing 35 of the pump 34 can have rigidly connected thereto a piston rod 65 leading into a cylinder 66. This rod 65 is connected to a piston 61 operating in the cylinder, and one end of the cylinder has communicating therewith a feed hose 63 leading from the main feed hose 32.

Hence, the piston is affected by the oil pressure in the feed oil line.

If the speed of operation of the pump increases, there will be a greater pressure in the line 32 and a greater oil pressure against the piston 61, and-this oil pressure will tend to shift the pump, the shafts 33 and 40, and the cone pulley 44 to the right (see Figure 2). This is permitted in view of the fact that the slide bar 42 is mounted in the guideway 43 for movement. vThe shifting of the pump 35 and the cone pulley 44 will allow the pulley belt to ride up on the large side of the cone pulley 44, and this will decrease the speed of the pump. When the oil pressure decreases, the pulley and the pump will be shifted back by a spring 69. A hand valve 1I can be arranged in the hose 63 for the cylinder 63 to shut off the flow of oil to the cylinder. when such may be desired.

As is also shown in Figures 1 and 2, by-pass hoses 12 can connect the feed hose line' 62 with the return hose line 53 on each side of the return pump inlet 33. Relief valves 13 are provided for controlling the ow of iluid through the by-pass hose 12, and, hence, when the preisure in the feed hose 62 exceeds a certain degree, the valve 13 will function to allow the liquid to by-pass from the feed hose 62 to thereturn hose 53.

In order to prevent the shifting of the pulley belt 45 during vthe movement of the cone pulley 44, guide rollers 14 are arranged on each side of the belt adjacent said cone pulley. These guide rollers can be carried by depending rods 15, and these rods are secured to the bottom of the car. y

By using the reversible pump 34, I eliminate complicated check valves in the system and difficulties contingent with the use thereof, such as freezing, sticking, and the like.

With the use of my enlarged oil sumps or tanks above the pumps, the complete separation of air from the oil is assured, and, thus, a steady stream of fluid will be delivered to the pump. Where air is mixed with the oil, there is danger of ice froming around the orifices in the nozzles 6l for the turbines, Which, in time, would affect the working of the entire system.

When heating devices are used in the bunkers, the oil from the pump can be shut off from one end of the car, and the turbines with the fans will give the necessary circulation for heating.

If preferred, a pump can be provided for each end of the car, and where this arrangement is used, the drive for a pump at one end of the car can be lifted lout of driving engagement with the car Wheel when it is desired to circulate air from one end only.

Various arrangements other than that shown in Figures 1, 2, and 3 for operating the pump can be employed, and in Figures 4 and 5, I have shown a swinging U-shaped hanger 16 rockably mounted in bearings 'i1 suspended from the car. The swinging bracket can have directly connected thereto the pump 13, and the pump shaft 13 is connected through a flexible coupling 30 with the drive shaft 3|. This drive shaft 8l has keyed or otherwise secured thereto a drive wheel 32, which normally engages the periphery of a car wheel 83. The bracket 16 is normally urged down toward the car wheel by springs 34, so as to insure the proper driving contact of the drive wheel 32 with the oar wheel 83.

By lifting the swinging bracket 16 against the tension of its springs 34, the wheel 82 can be held above the car wlieel, and, thus, the wheel 02 can be driven from some suitable external source of power. The bracket can be held in a raised position by moving a link 84 suspended from the bottom of the car over the bill of a hook 88 formed on the bracket. 4

In Figures 6, 7, and 8, I have shown another form of means for driving a pump. In this form, a pump 81 is rigidly secured to the bottom of the freight car, and its shaft is connected through the medium of a flexible coupling 88 with a flexible drive shaft 39. This drive shaft I9 is operatively connected to a friction wheel 80, which is adapted to be normally held in contact with a car wheel. The friction wheel 30 is carried by one end of a. swinging bracket or platform 9|, and this bracket or platform is rockably carried by a bearing 92 suspended from the bottom of the car. Spring means 93 is utilized for engaging the bracket or platform to hold the friction wheel 90 in contact with the periphery of the car wheel. This platform can also be held in a raised position by some suitable means. such as the means shown in Figures 4 and 5, when it is desired to drive the pump from an external source of power.

I lay great stress on the use ,of the exible drive shaft 89, as by utilizing a flexible shaft, the pump can be readily suspended from the bottom of the freight car, and all shocks thereto will be eliminated. The coupling 88 eliminates all end thrust on the pump shaft bearings. Where necessary or desirable, cushion means 95 can be interposed between the pump and the freight car.

In Figure 9, I have shown a form of drive for the pump similar to that shown in Figures l., 2, and 3, but in the form shown in Figure 9, no means is provided for changing the speed of the drive from the car wheel to the pump. In this flgure, a. pump 96 is suspended directly from the bottom of the car, and a driven pulley 91 is operatively connected to the pump shaft. This pulley wheel 81 has trained thereabout a drive `belt 98, and this belt is also trained over an idle pulley wheel 99 carried by a swinging bracket |00. The bracket is rockably mounted in bearings |0| carried by the bottom of the car, and the bracket is normally urged downward by coil springs |02. Hence, the pulley belt is normally held in driving contact with the periphery of a car wheel |03.

'I'he bracket |00 can be raised against the tension of the spring |02 when it is desired to lift the pulley belt off the car wheel, so that the pump can be driven by a small internal combustion engine or an electric motor or the like. To permit the lifting of the bracket |00, the bracket can be provided with a sector gear wheel |04, and this gear wheel can be actuated through the use of a swinging lever |05 having formed thereon a sector gear |08 for meshing with the sector gear |04.

Where the pump is driven at different speeds, due to the change of speed of travel of the freight car, I can provide means for controlling the flow of the air circulating through the car. As illustrated in Figures l0, 11, and 12, the spaces |01 above the partition |08 on each side of theair circulating fan |09 can be opened or closed by sliding gates ||0. 'Ihe gates ||0 can be automatically actuated according to the rate of now of the oil from the turbine to the return tank or sump H2.

To bring this about, I slidably mount in the Sump a bucket ||3 for initially receiving the oil from the turbine. This bucket has formed therein a relatively small oil escape opening I|4. The bucket is suspended in the `tank by means of exible ropes H0, which are trained about guide wheels ||0 secured to a shaft ||1. This shaft ||1 extends transversely across the car above the partition |08 and the sliding gates III. Each sliding gate has connected therewith a ilexible rope H8, which is trained over and secured to a guide pulley ||9 secured to the shaft ||1.

In operation of this form of my invention, should the speed of the pump increase, a greater quantity of oil will be forced to the turbine, and this oil will be delivered in relatively large quantities to the bucket H3. If the oil cannot escape fast enough through the opening ||4, the oil will collect in the bucket, and the weight thereof will carry the bucket down and turn the shaft H1. As the flexible ropes ||8 for the gates are wound in a reverse direction over the pulleys ||l from the ropes I I 5 over` the pulleys I I6, the ropes I8 will be wound up on the pulleys of the guide wheels 9, and the gates will be raised. This will decrease the circulation of air through the car.` The bucket ||3 also acts as a baille and facilitates the separation of air from the oil.

In some instances, it may be advisable to utilize a plurality of air circulating fans, and in Figure 13, I have shown an air circulating fan |20 for each space |2| above the partition |22. In all events, the number of air circulating fans |20 can be increased or decreased without departing from the spirit or the scope of the invention. Thus, in the form of my invention shown in Figure 2, I have illustrated three fans, and in Figure 13, I have shown flve fans. As illustrated in Figure 14, two fans |23 can be utilized, and, if desired, these fans can be arranged on opposite sides of the longitudinal center of the car. In all instances, the fans are shrouded or mounted in a suitable hood.

In certain instances, it may be desirable to eliminate the bunkers and to utilize the entire length of the cars for receiving the goods being shipped, and in Figures 15 and 16, I have illustrated shiftable partitions |24. Where shiftable partitions are utilized, the lower ends of the oil return Y,tanks or sumps |25 are connected by ilexible hoses |26 with the return oil pipe |21 for the oil pump, and it is also to be understood that a flexible hose is utilized from the oil feed pipe to the turbines.

The partitions are held securely in place in an adjusted position through the use of brackets |28 and screws |29. Obviously, by releasing the screws, the partitions can be shifted back against the end walls of the freight car, as shown in dotted lines in Figure l5. The gratings |30 for the ice can be arranged in the same plane as the false flooring |3| for the freight car, s0 as to facilitate the easy shifting of the partition. The gratings |30 can be longitudinally slotted, as at |32, to form guideways for the flexible hoses |20 during the shifting of the partition. The shifting of the partition will not affect the working parts of my system in view of the fact that the turbines, fans, and oil sumps are all carried by the partitions. Where stationary partitions are utilized, I prefer to employ rigid pipes in the car, as shown in Figures 1 and 2.

In lieu of utilizing the bypass hoses 02, shown in Figure 1 and 3, I can utilize a bypass pipe |33. 'I'his pipe |33 is connected with the feed oil pipe |34 extending to a turbine, and the by- ,siaaes 5 pass pipecaabe extended directly into melon sump |25. A bypass valve |35 is employed for the bypass pipe |33, and when the pressure of the oil reaches a certain degree, the valve will allow the escape of oil Afrom the pipe line |35 into the sump Ill.-

In lieu of providing a turbine'for each air circulating fan, I can utilize one turbine |36 only (see Figure 16) and drive the other fans |31 from this turbine through any suitable mechanical power transmission, such as belts |38 and pulleys |19, or shafts and gearing.

From the foregoing description it can be seen that I have provided novel means for supporting the oil sumps in the partitions and novel means for operating the oil pumps from a moving part of the freight car.

' ment separate from the storage compartment, an

air circulating fan for drawing air from one of said compartments and delivering it to the other of said comaprtments, means for operating said fan, including a turbine, and a pump delivering liquid under pressure to said turbine; means for driving the pump from a wheel of the truck of the car, including a pulley belt normally held in engagement with the periphery of said wheel.

2. In a refrigerator car of the type having a body including a storage compartment and a bunker compartment therein, car trucks for the' body including car wheels, an air circulating fan for drawing air from one of said compartments and delivering it to the other of said compartments, means for operating said fan, including a "turbine, and a pump delivering liquid under pressure to said turbine; a drive shaft for the pump, a pulley wheel on the drive shaft arranged on one side of the car wheel, an idle pulley wheel arranged on the other side of the car wheel, a

` pulley belttralned about said pulley wheelsfor engaging the periphery of the car wheel, and means normally urging the belt into driving contact with said car wheel.

3. In a refrigerator car of the type having a body including a storage compartment and a b'ux'iker compartment therein, car trucks for the body including car wheels, an air circulating fan for drawing air from one of said compartments 'and delivering it to the other of said compartments, means for operating said fan, including a turbine, and a pump delivering liquid under pressure to said turbine; a drive shaft for the pump, a pulley wheel on the drive shaft arranged on one side ofthe car wheel, an idle pulley wheel arranged on the other side of the car Wheel, a pulley belt trained about said pulley wheels for engaging the periphery of the car Wheel, vmeans normally urging the belt into driving contact with said car wheel, and means for lifting the belt out of driving contact with the car wheel, whereby to permit the operation of the pump from an external source of power. A

4. In a refrigerator car of the type having a body including a storage compartment and a l bunker compartment therein, a car truck for the body having wheels, an air circulating fan for drawing air from one of said compartments and delivering it to the other of said compartments,

and means for operating said fan, including a turbine, a pump delivering liquid under pressure to the turbine, a drive shaft for the pump. means slidably mounting the pump and drive shaft on the body on one side of a car wheel, a cone pulley secured to the drive shaft, an idle pulley disposed on the other side of the car wheel from the pump, a pulley belt trained about the idle pulley wheel and the cone pulley wheel, spring means normally holding the pulley belt in driving contact with the last-mentioned car wheel, and means for s hifting the pump and cone pulley wheel relative to the belt in accordance with the pressure of the liquid delivered from the pump to the turbine.

5. In a refrigerator car of the type having a storage compartment and a bunker compartment separate from the storage compartment, an air circulating fan for drawing air from one of said compartments and delivering it to the other of said compartments, means for operating said fan, including a turbine, and a pump delivering liquid under pressure to said turbine: a drive shaft for the pump, a drive cone pulley for the shaft, a pulley belt trained over the cone pulley, means for operating the belt from a wheel of the truck of the car, and means for shifting the cone pulley relative to the belt according to the pressure of the liquid delivered from the pump to the turbine.

6. In a refrigerator car of the type having a storage compartment and a bunker therein, an air circulating fan for drawing air from one of said compartments and `delivering it to the other of said compartments, and means for operating said fan, including a turbine; a rotary pump delivering liquid under pressure to said turbine,

a return sump `for the liquid arranged in the car for receiving the liquid directly from the turbine, a return pipe for conducting spent liquid from the sump to the inlet of the pump, and

means for driving the pump from a wheel of the truck of the car.

'7. In a refrigerator car of the type having a transverse partition to divide the car into a storage compartment and a bunker compartment, an air circulating fan for drawing air from one of said compartments and delivering it to the other of said compartments, and means for operating said fan, including a turbine; a pump delivering liquid under pressure to said turbine, means for driving the pump from a moving part of the car, a sump for the liquid arranged within said partition between the turbine and the pump, and a return pipe for conducting spent liquid from the bottom of the sump to the inlet of the pump.

8. In a refrigerator car of the type having a body and a transverse partition therein for dividing the body into a storage compartment and a bunker compartment, an air circulating fan arranged above the partition for drawing air from one of said compartments and delivering it to the other of said compartments, and means for operating said fan, including a turbine arranged above vthe partition; a pump for delivering liquid under pressure to said turbine, a return sump for the liquid arranged in said partition above the pump and directly below the turbine for receiving spent liquid from said turbine,'and a return pipe for conducting liquid from the bottom of said sump to the inlet of the pump. y

9. In a refrigerator car ofthe type having a body and a transverse partition therein for dividing the body into a storage compartment and a bunker compartment, an air circulating fan arranged above the partition for drawing air from one of said compartments and delivering it to the other of said compartments, and means for operating said fan, including a turbine arranged above the partition; a pump for delivering liquid under pressure to said turbine, a return sump for the liquid arranged in said partition above the pump and directly below the turbine for receiving spent liquid from said turbine, and a return pipe for conducting liquid from the bottom of said sump to the inlet of the pump, said partition being shiftable in said body to one position for forming the compartments and to daynother position against an end wall of the bo 10. In a refrigerator car of the type having a storage compartment and a bunker compartment, an air circulating fan for drawing air from one of said compartments and delivering it to the other of said compartments, means for operating said fan, including a turbine, and a pump delivering liquid under pressure -to said turbine; means for driving the pump from a wheel of the truck of the car, including a swinging platform rockably mounted on the car, said pump being mounted directly on the platform, a friction pulley for engaging the wheel rotatably oarried by the platform, means operatively connecting the pulley to the pump, spring means normally urging the platform and the friction ,pulley toward the wheel, and means for holding the platform in a raised position with the friction pulley out of engagement with the car wheel.

11. In a refrigerator car of the type having a body including a storage compartment and a lbunker compartment, an air circulating fan for drawing air from one of said compartments and delivering it to the other of said compartments, means for operating said fan, including a turbine, and a pump delivering liquid under pressure to said turbine; means for driving the pump from a wheel of the truck of the car, including a swinging platform rockably carried by the car, means securing the pump to the body of the car above the platform, a friction pulley carried by the platform, means normally urging the platform and friction pulley toward the wheel with the pulley in driving contact with the wheel, and a flexible shaft operatively connecting the friction pulley with the pump.

12. In a refrigerator car of the type having a body including a storage compartment and a bunker compartment, an air circulating fan for drawing air from one of said compartments and delivering it to the other of said compartments, means for operating said fan, including a turbine, and a pump delivering liquid under pressure to said turbine; means for driving the pump from a wheel of the truck of the car, including a swinging platform rockably carried by the car, means securing the pump to the body of the car above the platform, a friction pulley carried by the platform, means normally urging the platform and friction pulley toward the wheel with the pulley in driving contact with the wheel, a iieidble shaft operatively connecting the friction pulley with the pump, and a flexible coupling interposed between the flexible shaft and the pump.

ing it to the other of said compartments, means for operating said fan, including a turbine, a pump delivering liquid under pressure to said turbine, means for driving the pump from a moving part of the car, and gates for controlling the space between the partition and the top of the car; means for automatically operating said gates according to the rate of flow of spent liquid from said turbine. A

14. In a refrigerator car of the type having a body and a transverse partitionarranged in said body terminating short of the top of the body forming a storage compartment and a bunker compartment, an air circulating fan for drawing air from one or said compartments and delivering it to the other of said compartments, means for operating said fan, including a turbine, a pump delivering liquid under pressure to said turbine, means for driving the pump from a moving part of the car, and gates for controlling the space between the partition and the top of the car; means for automatically operating said gates according to the rate of flow of liquid delivered to said turbine, Said means including a movable bucket for receiving liquid from the turbine, a shaft for moving the gates, and an operative connection between the movable bucket and the shaft.

15. In a refrigerator car of the type having a body including a transverse partition therein terminating short of the upper end of the body forming a storage compartment and a bunker compartment in said body, an air circulating fan for drawing air from one compartment and delivering it to the other compartment, a turbine for operating said fan. a pump for delivering liquid under pressure to said turbine, a return sump for the liquid arranged below the fan and turbine, a return pipe for conducting spent liquid from the bottom of the sump to the inlet of the pump, and movable gates for controlling the active size of the space between the partition and the top of the body: a rotatable shaft disposed above the gates, means operatively connecting the shaft to the gates, a sliding bucket arranged in the sump for initially receiving the liquid from the turbine, said bucket having a small drain opening therein, and means operatively connecting the sliding bucket to the shaft for operating said shaft upon downward movement of the bucket.

16. In a refrigerator car having a body provided with a transverse partition dividing the body into a storage compartment and a bunker compartment, sai partition including equidistantly spaced rights and panels between said uprights terminationg short of the top of the car defining a plurality of openings between the panels and the top of the car, and air circulating fans arranged in certain of said openings on op-` posite sides of the central opening.

17. In a refrigerator car of the type having a body including a storage compartment and a bunker compartment therein, an air circulating fan for drawing air from one of said compartments and delivering it to the other of said compartments, means for operating said fan. including a turbine, and a pump delivering liquid under pressure to the turbine: means for driving the pump from a wheel of the truck of the car, and means forming a part of said drive for maintaining the speed of the pump substantially uniform, irrespective of the speed of rotation of the car wheel.

18. In a refrigerator car of the type having a storage compartment and a bunker therein, an air circulating fan for drawing air from one of said compartments and delivering it to the other of said compartments, means for operating said fan, including a turbine, and a pump for delivering liquid under pressure to said turbine; a. return sump for the liquid arranged in the car for receiving the liquid directly from the turbine, a

ROBERT KENT SCHW'EBS.

Images