US1195162A

US1195162A - stair

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Publication number: US1195162A
Authority: US
Publication date: 1916-08-15
Anticipated expiration: 1933-08-15

Description

Patented Aug. 15, 1916.

4 SHEETS-SHEET l.

W. S. STAIR.

REFRIGERATING MACHINE.

APPLlcATloN FILED 11.14.1915.

W. S. STAIR.

REFRIGERATING MACHINE.

APPLlcAloN FILED APn.14.|915.

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2 6 1 a 5 WW 9 M 1..- U 13 W A TTOHNE YS W. S. STAIR.

REFRIGERATING MACHINE.

APPLICATION FILED APR. I4, I9I5.

Patented Aug. 15, 1916.

4 SHEETS-SHEET 3.

nvm/ron M5 Siam EL@ WTNESSES.'

A TTORNE Y W. S. STAIR.

REFRIGERATING MACHINE.

APPLICATION FILED APn.|4.1915.

Patented Aug. 15, 1916.

4 SHEETS-SHEET 4.

A TTORNE Y ai (l UNITED STATES PATENT OFFICE.

WILLIAM S. STAIR, F NEW YORK, N. Y.

REFRIGERATING-MACHINE.

Application led April 14, 1915.

To HU whom if may concern:

Be it known that I, WILLIAM S. STAIR, a citizen ol the llnited States, and a resident ot the citv ot New York. borough of Brooklyn. in the county of Kings and State of New York. have invented a new and I mproved Refrigeratiiig-Machine, ot' which the following is a full, clear, and exact description.

Mv invention relates to refrigerating machines of the rotary type; and has reference more particularly to the inclosed rotary type ot machine in which the refrigeratlng medium and the lubricating medium are adapted to mix and are separated b v the centrifugal force generated b v the machine.

An object Aot the invention is to provide a simple and efiicient refrigerating machine in which the refrigerating medium is separated from the lubricating medium bet'ore thc rel'rigerating medium is liquefied.

A further object of the invention is to provide a retrigerating machine having revoluble separators. in which the tlow of the lubricant and the refrigerating mediums are in opposite directions, and having ballles breaking up the tlow and permitting a more perfect separation between the two mediums.

A still further object of the invention is to provide a refrigerating machine having a revoluble condenser, a portion ot' which is emerged. and which condenser is substantiall v surrounded bv a dripping chamber. about which chamber an tornlcd to accelerate the evaporation of the water lilm formed bv the coiulenser ot' the dripping chamber.

Still another object of the invention is to provide a refrigerating machine in which thc connection between the evaporator and lhe liquefied refrigerating medium container is controlled bv the centrifugal force generated bv the machine.

'ith the above and other objects in view. the nature of which will more tullv appear a the description proceeds. the invention consists in the novel construction. coinbi nation and arrangement of parts as herein l'idlv described. illustrated and claimed.

ln the accompanying drawings. forming parl et' the application, similar characters Specication of Letters Patent.

air current is Patented Aug. 15, 1916.

Serial No. 21,275.

of reference indicate corresponding parts in all the views.

Figure l is an axial section through my machine in inoperative position; Fig. 2 is a plan view thereof with the cover removed, certain parts being shown in section in a plane at right angles to the section plane of Fig. 1; Fig. 3 is a transverse section on line 3-?l, Fig. 2; Fig. 4 is a transverse section on line -1i, Fig. 2, the dotted lines illustrating the position ot' the counterweight when the machine is in action; Fig. 5 is an enlarged, longitudinal section through the valve leading to the expansion chamber: and F ig. 6 is a perspective view of the weights for actuating the valve.

Before proceeding to a more detailed description ot' my invention it must be clearly understood that the number of compressors and eliminatorsl in the machine can be varied in accordance with the size of the machine and the capacity of the same.

Referring to the drawings, 7 represents a shell formed of three sections 8, 9 and 10 united b v bolts 11 or any other suitable means. The end section 8 of the shell has an exterior extension 11 co-axial therewith and forming a shaft for the shell. The end section has also an outwardly directed tubular extension 12 co-aXial therewith and also forming a shaft for the shell. The extensions ll and 12 are journale'd in bearings 13 formed in the casing li for the shell, and which casing is provided with a removable cover 15 wher-cb)7 access may be had to the shell and parts associated therewith.

counterweight lo is suspended within the shell T on ball bearings 1T carried by the sections .s and 9 respectively. rl`he axis of oscillation of the collnterweight is in alinenient with the. axis ot the shell. A cavity 1S is provided in the counterweight lo forming a reservoir tor lubricant. The open end of the reservoir is closed b v a cover l!) having a scoop 2() t'or collecting the lubricant held against the inner `peripheral surface ot' the shell formed b v the sections o and 9. The inner peripheral surface ot' the shell t'ormed by these two sect-ions is made to converge toward the central part ot' the peripheral surface whereat an annular groove l is formed, and which groove.

registers with the scoop 20. It is self-evident that the centrifugal force will bring the lubricant into the groove 21, wherefrom the scoop 20 will direct it into the reservoir 18 through the opening 22 provided between the cover 19 and the edge of the reservoir 18. A strainer 23 is located at the opening 22 through which the lubricant has to pass before entering the reservoir 18, thus assuring a clean lubricant within the same.

A pin 24 projects laterally from the counterweight 16 into the section 9 4of the shell, said pin being rigid with the counterweight 16; but its axis is not in alinement with the axis of oscillation of the counterweight, consequently the pin 24 is eccentric with the bearings 17. The pin 24 has a bore 25 leading to a chamber 26 within the olmterweight which communicates by a conduit 27 with the lubricant reservoir 18. In the inoperative position of the machine, as indicated in full lines in Fig. 4, the conduit 27 is above the level of the lubricant Within the reservoir 18, therefore cutting off the supply of lubricant from the reservoir to the chamber 26. But when the machine is in operative position, as indicated in dotted lines in Fig. 4, the lubricant can freely flow through the chamber 26 of the counterweight. The bore 25 leads from the chamber 26 to the surface of the pin and also to the ball bearing 17 carried by the section 9 of the shell. nects the chamber 26 with the ball bearing 17 carried by the section 8 ofthe shell so that lubricant from the reservoir 18 is supplied to the ball bearings on which the counterweight revolves and to the pin 24 on which the connecting rods 29 of the compressors are mounted.

The section 9 of the shell is provided with cylinders 30 each engaged by a piston 31 secured to a correspondingconnecting rod by a wrist pin 32. liston rings 33 are provided on each piston, also circular groovesl 34, the lattercommunicating with a recess 35 of the piston where the wrist pin end of the connecting rod is located. The recesses 35 of the pistons communicate with the central opening of the section 9 into which the pin 24 projects. The lubricant passing through the pin 24 will lubricate the same and afterward will be thrown from the connecting rod 29 into the recesses 35 from where it is carried to the circular grooves 34 and, consequently, to the cylinder walls. Passages 36 establish communication between the central opening of the shell 7 with the surrounding openings leading to the chamber formed by the sections S and 9 which inclose the counterweight 16. These passages 36 are adapted to return to said chamber that portion of the lubricant which does not pass through the cylinder and prevents an excessive accumulation ot' lubricant A passage 28 conin the central opening where the pin 24 is located.

Each of the cylinders 30 is equipped with a discharge valve 37 constructed of a ring which forms a cage for ball valves which are held to their seats by centrifugal force and the condensing pressure against them during the suction stroke of the corresponding piston, said ball valves openingduring the discharge stroke of the same. Passages 38 bring the discharge valves 37 into communication with the interior of the shell when the balls are off their seat and insure the return to the shell of all lubricant passing through the cylinder. Each of the cylinders 30 is provided with a false head 39 forming a seat for the suction valve 40 and carrying a relief valve 41. The valves 41, under excessive pressure in the high pressure side of the machine will establish communication with the low pressure side of the machine. The suction valve is in the shape of a centrally apertured disk maintained against its seat by centrifugal force and discharge pressure, and will uncover the ports 42 during the suction stroke of the corresponding piston, thus admitting vapors of the refrigerating medium to the corresponding cylinder through said ports and through the central opening in the disk.

The ports 42 of the false head are in communication with the tubular extension 12 of the shell by means of passages 43. Attached to the hollow shaft 12 is a casing 44 which carries an evaporating coil 45 inclosed in a suitable chamber 45 to be refrigerated. One end of said coil is in direct communication with the hollow shaft 1,2. The other end of the coil leads to the expansion chaniber 46 formed within the casing 44. a spring 48 abutting against apertured plug 4S and the condensing pressure in the chamber 51, said valve 47 separates said chamber 51 from the expansion chamber 46. Engaging the valve 47 is a spindle 49 which is displaced axially by pivotally mounted weights 50 under the action of the centrifugal force generated by the speed, whereby the valve 47 is opened and permits the flow of liquid refrigerating medium from the chamber 51 to the expansion chamber 46. Associated with the spindle 49 is a spring 52 the tension of which can be varied by means of a cap 53 and an adjustable pin 54 and thereby any desired opening of the valve 47 may be obtained for any predetermined speed of the apparatus. thus assuring a flow of liquid refrigerant to the evaporator in proportion to the displacement of the compressors. lt will be noted that the condensing pressure tends to close the valve 47, consequently an increase in pressure will reduce the valve opening and a decrease in the condensing pressure will increase the valve opening, so

A valve 47 is held to its seat by that under these conditions the ilov-7 of the liquid refrigerant will be unaffected by changes in the condensing pressures. The valve 47 in chamber 51 is preferably screened to prevent any extraneous matter from lodging itself the seat of the valve and thereby affecting the operating of the machine. It is self-evident that in lieu of the weight 5() for the control of the valve any other suitable means, such as diaphragms .for example, can be provided with substantially the same result.

A liquid refrigerant receiver 55 connects the chamber 51 with the section 10 of the shell. The said receiver is in the shape of a tubular v member concentric with the tubular shaft12. The receiver 55 communicates Vwith one end of a condensing coil 5G b y means of a passage 57 formed within the section 10`of the shell. The other end of the coil 56 leads into va central recess 58 within the section 10 of the shell. Located within the said recess 5S is a baffle member 59 which is spaced uniformly from all the surfaces of the recess and forming therewith a vsinuous passage 60. A similar sinuous passage 61 is formed by a second baille member G2 projecting into said baille member 59 from the central opening of the shell section 9. The two sinuous passages (l0 and 61 are inter-communicating through an opening (33 provided in the axis of the baille member 59 and through which the bolt connecting the two baiile members to ,the section 10 projects. The sinuous passage G1 communicates also at its periphery by a lead (34 with one end of chambers G5 provided in the section 9 of the shell. 'lhe other end 'of the chamber communicates with the interior of the shell by a lead 66. Located within each chamber 65 is a lubricant.eliminator G7. Each eliminator has a plurality of baiile plates G8 of any suitable design for eliminating the lubricant from the refrigerating gases returning from the compressors through the lead GG toward the condensing coils 56.

Surrounding the condenser 5 6 and mounted to revolve therewith is a screen G9 which, with the condensing coil is partly immersed in. the cold water contained in the base of the condenser chamber 70 forming part of the easing 14. Positioned within the condensing chamber 70 above the water level and about the screen 69 is a screen 71 which has protuberances on its inner peripheral surface from which the water drips on to the screen 69. lTherefore the screen 71 constitutes the dripping chamber; rPhe revolving screen (i9 will throw the water against the screen 71 from where the same will drip back ou to the screen (19. The iinely divided spray of water formed on the screen iS cooled by accelerated evaporation produced by a current of air created by a fau 72 which is associated with the section 10 of thc shell.

The said fan is adapted to draw the air through the central opening 73 of the cas- .ing 14 and direct the same to vthe passages 74 over the screen 71 'and through the screen G9. The air, after passing through the screens, finally escapes through the con denser chamber 70 into the casing 14.

F or charging the machine with the refrigerating medium, the expansion chamber is equipped with a valve 77 whereby the Athe weights under the centrifugal force generated by the machine. Consequently, the liquid refrigerating medium will enter from the receiver to the evaporator 45 through the expansion chamber 46. Through the evaporating coils 45 the refrigerating medium will flow as a gas or vapor through the tubular shaft 12 to the compressor.

From the compressors it is discharged through passages 38 into the shell 7, from which it will passthrough the leads 6G into the lubricant ehmmators (37, thence through leads 64 to the sinuous passages 60 and G1, the said sinuous passages and 61 forming additional lubricant eliminators for the compressed vapors of refrigerant flowing to the condenser where the said gases are condensed to a liquid before entering thev receiver It will be noted that the flow of the refrigerating vapors or gases and the liquid within the tubular shaft l2 and the receiver 55 is in opposite directions and that the vapors surround the liquid, consequently helping to maintain the refrigerating lnedium within the receiver in a'liquid form. The counter-weight and the reservoirs associated therewith do not revolve butassume the position shown in dotted line in Fig. 4. ln this position the. hihricantreservoir supplies lubricant to the pin '24 and the bali bearings 17. The lubricant from the hearings returns directly to the shell. while the portion of the lubricant from the pin passes through the cylinders. Aas previously de scribed, but all of the lubricant is returned to the reservoir.

The shell 7 is It will be noted that therilow of the vaporsA i crating medium are separated from the lubricant, which is in liquid state, and thereby a more perfect separationbetween the two mediums isl obtained, which separation is further facilitated vby the baffles G8 provided within the eliminators 67. v

Dueto the low `velocity.'of th'e gas within vthe shell after thesame hasbeen "discharged from Athe compressors, al certain portion of the lubricant acquired .by .the gas is deposited directly into the shell; the balance 'passes with vthe vapors or gases of the refrigerating medium to the lubricant eliminalo'rs, from where the-lubricant is returned bycentrifugal vforce to the shell, the gas passing to the condenser, vas previously described. r y

l `roin the foregoing.description, taken in connection with the accompanying drawings, the advantage of the construction and operation of the apparatus shown will be readily understood by tho'se skilled in the art to which the invention pertains; and while I have described the principle of operation, together with theapparatus which I now vconsider to beA the best embodiment thereof, I desire to have it understood that the .apparatus shown is' 'merely illustrative and that such changes may be lnade as are within the scope ofl the appended claims.

I claim: i l. A rotary refrigerating ,machine comprisnrg` a'comprcssoi", means 'for supplying lubricant to the compressor', a Acondenser associated with. the compressor, and means, interposed betwecirtlie compressor and condenser for climinatiiigliquid lubricant from the compressed' vapors of refrigerant delivered by the compressor to the condenser.

2. A rotary refrigerating machine, comprisin,"r a shell mounted t,o',i"otat.c, a coinpress-or issoeiated with the shell, means within the shell .for supplying lubricant to the movingr parts, a condenser associated with the shell, and means interposed between the `eonipresser and the condenser for eliminating liquid lubricant present in tlie compressed gases flowing from the coinpressor to the eondei'iser.

Il.' [u a rotary refrigerating -niacli-inc', a. revolnble shell. :i compressor. means locatedV -within the shell for supplying lubricant to valve. under the centrifugalf4 force.-

revoluble condenser, al screen inelosing theeondenser and mounted to rotate therewith, said screen and condenser adapted to be irnn'iersed in \vatcr,.a drippingchamber substantially encompassing said screen, and a fan for supplying ai'r through the dripping chamber, substantially as .and for the purpose set forth.- -Y i 5. In a rotary refrigerating machine, a

revoluble condenser .partly immersed, va drippingr chamber surrounding, the 4same and adapted to receive the Awater-from the revoluble condenser, and meansjfor. forcing air through the dripping chamber.

C. In a rotary refrigerating machine, a revolnble evaporatoi, a.V liquid` .refrigerant receiver associated therewitlnanda1-valve controlling the flow from .the receiver to the. e\'a[.\orator controlledby the'velocity of the revolnble evaporator i 7. In a rotary retrigerating machine, an evaporator, -a liquid refrigerant receiver, a valve controlling theA How from the receiver to the evaporator; centrifugal loperable,-

nieans controlling the operation of thefq'o.

valve, and adjustable Ameans forl 'va ryingVl the displacementl of thervalve',,substantially as and for the purpeseiset forth.

8. In a rotary re'jf'rige'rating maeliine,.a revoluble evaporator, a.. liquid Aref 'ri'bfte'rai'it 1 .ffromj receiver, a valvev controlling.athe the receiver to the. evaporatorpmea able by centrifugal forcescontrolling. the` alve`,',.and.'dJustable means for va ryi-ng the displacement V.o'- the .160

opeat'ion of the,

il. In a rotary refrigerati-righi i water taule,l a -rcvolubleeenden r partly immersed therein, ieans for receiving the water from thel revolvingcondenser:and re-z; turningr thesaine inla finelydivided'-state to the water tank, and means for circulatingr air throughv said n'ieans, substantially as and? for the, purpose set fortlr l0. In a rotary refrigerating machine, a compressor, means ,forsupplying liquid .lubricant to the conil'iressor, a. condenser'associated 'with thecomprcssor. and means,

including ballles. ii'iterposed bi1-.tween the compressor and'eondenser for eliminating liquid 'lubricantfrom the .compressed vapors of the refrigerant delivered by the compressor to Athe condenser..

1l. In a rotary refrigeratii'ig niacliine, :t

revoluble shell, a compressor associated therewith. means located within the shell for supplyingr lubricant to ,themoving parts. said compressor being` adapted to deliver the compressed Arefrigerant vapor into the shell. a condenser associated lwith the shell, nii-ans associatml with the shell and condenser lor directingr the. Compressed vapors` from (lie periphery .of tllc Shell through the renter thereof into the condenser. ballle plates within said meansrfor breaking up the flow so as to obtain a more perfect separation between the compressed refrigerant and liquid lubricant, said last mentioned means being adapted to return the lubricant to the shell at the periphery thereof, and means for scooping the lubricant from the periphery of the shell into the means for supplying the lubricant to the moving parts.

12. In a rotary refrigerating machine, a condenser, an evaporator, a revoluble shell, a counterweight freely suspended within the shell, compressors associated with the shell and counterweight controlling the flow of the refrige.I ant from the condenser to the evaporator, said counterwcight forming a lubricant reservoir adapted to supply lubricant to the movable parts within the shell, lubricant eliminators positioned within the shell intermediate the compressor and the condenser, and means for returning the lubricant eliminated from the refrigerant to the reservoir within the counter-weight.

13. In a rotary refrigerating machine, a revoluble evaporator, a revoluble condenser, a revoluble shell, a counterweight freely suspended within the shell, a compressor associated with the shell, a condenser communicating with said evaporator and shell, a liquid refrigerant receiver positioned between the condenser andA evaporator, a valve controlling the flow from the receiver and the evaporator, centrifugal operable means controlling the operation of the valve, said counterweight forming a lubricant reservoir adapted to supply lubricant to the movable parts Within the shell, lubricant eliminators positioned between the condenser and the shell wherethrough the compressed vapors discharged by the compressors into the shell are conveyed into the condenser and the lubricant returned to the shell, baille plates in said eliminators, and means associated with the counterweight for scooping the lubricant from the shell into the counterweight.

14. In a refrigerating machine, a centrifugal separator comprising a chamber adapted to receive refrigerant in vapor form mixed with liquid lubricant, said chamber having an outlet for lubricant and an outlet for refrigerant, the latter outlet being nearer to the axis of rotation than the lubricant outlet, the centrifugal force causing the lubricant present in the refrigerating vapor to move toward the lubricant outlet as the refrigerating vapor moves to the refrigerant outlet, due to the greater density of the lubricant over the refrigerating vapor.

15. In a rotary refrigerating machine, a revoluble separator comprising a chamber adapted to receive refrigerant in vapor form mixed with liquid lubricant, said chamber having a lubricant outlet and an outlet for refrigerant nearer to the axis of rotation than the lubricant outlet, and means in said chamber for offering resistance to fiow and positioned between the lubricant outlet and the refrigerant outlet.

1G. A rotary refrigerating machine, comprising a compressor, means for supplying lubricant to the compressor, a condenser associated with the compressor, and a centrifugal separator for eliminating liquid lubricant from the compressed vapors of refrigerant delivered by the compressor to the condenser.

17. A rotary refrigerating machine, comprising a compressor, means for supplying lubricant to the compressor, a condenser associated with the compressor, and means for centrifugally separating lubricant from compressed vapors of refrigerant delivered by the compressor to the condenser.

18. In a rotary refrigerating machine, a revoluble shell, a compressor associated therewith, a lubricant container within the shell for supplying lubricant to the moving parts, a condenser associated With the central part of the shell, said compressor being adapted to discharge compressed refrigerant into the shell, and a separator for centrifugally eliminating liquid lubricant from the compressed vapor, said separator having a lubricant outlet at the periphery of the shell, and a refrigerating vapor outlet at the central part of the shell leading to the condenser.

19. In a rotary refrigerating machine, a revoluble evaporator, a revoluble condenser, a liquid refrigerant receiver between the condenser and the evaporator, a valve controlling the How of the refrigerant from the receiver to the evaporator, weights associated with the valve and adapted to be moved apart by the centrifugal force, whereby the valve is operated, and adjustable means for varying the displacement of the weights whereby the displacement of the valve is controlled.

Q0. In a rotary refrigerating machine, a revoluble shell, a suspended counterweight free to revolve and having a lubricant receptacle rendering said counterwei ht unbalanced whereby said weight, is dlsplaced angularly by the velocity of the shell, said receptacle having. an inlet and an outlet which becomes operative when the counterweight is displaced angular-ly, and scooping means associated with the receptacle at the inlet for collecting,r the lubricant from the inner periphery of the shell and directing it into the inlet of the receptacle.

21. In a rotary refrigerating machine` a revoluble shell, a counterweight suspended in the shell and free to revolve, said counterweight having a lubricant receptacle rendering the counter-weight unbalanced, whereby the same is displaced angularly during the revolution of the shell, said re- Aso ceptacle having a lubricant inlet and a lubricant outlet which becomes ,operative when the counterweight is displaced anglilarly and whereby lubricant is fed through the outlet to the lnovable parts within the shell, said shell having a circular groove on the inner periphery thereof, a scooping member carried by the counterweight and located adjzuexlt the inlet of the receptacle and engaging said circular groove. and a strainer at the inlet of the receptacle adapted to receive the oil collected by the scooping member before the same passes into the receptacle.

22. In a refrigerating machine, a centrifugal separator comprising a chamber adapted to receive refrigerant in vapor form mixed with liquid lubricant, said chamber having an outlet for lubricant and an outlet for refrigerant, the latter outlet being nearer to the axis of rotation than the lubricant outlet, and baffle plates across the chamber interposed between the outlets, the alternate plates having openings at the periphery of the chamber, the other plates having openings in the central part thereof.

23. In a rotary refrigerating machine, a revoluble separator comprising a cylindrical chamber, the axis of which is normal to the axis of rotation, said chamber being adapted to receive refrigerant in vapor form mixed with liquid lubricant at the end of the chamber remote from the axis of rotation, said chamber having an outlet for lubricant at said end of the chamber remote from the axis of rotation, said chamber having a refrigerant outlet at the other end of the chamber, and concavo-convex baille plates disposed across the chamber between the outlets, the facing surfaces of the baiiles being of the same character, the alternate plates having an opening in the central part thereof and the other plates having openings at the margin.

24. In a rotary refrigerating machine, a revoluble separator comprising an elongated chamber the longitudinal axis of which :is normal to the axis of rotation of said separator, said chamber having an inlet for refrigerant in vapor form mixed with liquid lubricant at the end of the shell remote from the axis of rotation, said chamber having an outlet for refrigerant at said end of the chamber remote from the axis of rotation and an outlet for refrigerant at the other end of the chamber, and concavo-convex baffle plates extending across said chamber between the outlets, the adjacent baille plates having the facing sides of the same character, the alternate plateshaving openings at the margins thereof and the other plates, in central part.

25. In a rotary refrigerating machine, a revoluble shell, a condenser associated with the shell, a revoluble evaporator, a hollow shaft connecting the evaporator with the shell, a compressor within the shell operable b v the movement thereof, said shell having means establishing communication between the hollow shaft and the compressor, said shell having also means for establishing communication between the condenser and the compressor, a tube within the hollow shaft connecting the shell to the evaporator, said shell having means establishing communication between said tube and condenser, and a valve controlling the flow from said tube to the evaporator.

2G. In a rotary refrigerating machine, a revoluble shell, a coil-shaped condenser mounted to revolve with the shell, a casing, a hollow shaft connecting the casing to the shell to cause the same to revolve with the shell, a compressor within the shell operable by the movement thereof, said shell having means establishing communication between the hollow shaft and the compressor, said shell having also means establishingr communication between the compressor and one end of the condenser, a tube within the shaft connecting the casing to the shell and mounted to revolve therewith, said shell having means establishing communication between the other end of the condenser and said tube, a coil-shaped evaporator mounted about the casing and having both ends thereof secured to said casing, said casing having means establishing communication between one end of the coil and the hollow shaft. said casing having also means establishing communication between the other end of the coil and the tube, and a valve in said casing interposed between the said end of coil and said tube for controlling the flow from said tube to said evaporator.

27. In a rotary refrigerating machine, a revoluble shell` a compressor within the shell operable by the movement thereof, means for supplying lubricant to the compressor, an evaporator in communication with the compressor, a centrifugal separator for eliminating liquid lubricant from the comv pressed vapor of refrigerant delivered by the compressor, a condenser for receiving the refrigerant separated from the lubricant, and baflles within the shell interposed between the condenser and the separator.

28. In a rotary refrigerating machine, a revoluble shell, a compressor within the shell operable by the movement of the shell, means within the shell for supplying lubricant to the compressor, an evaporator exterior of the shell and mounted to revolve therewith in communication with the compressor, a centrifugal separator in the shell mounted to revolve therewith adapted to receive from the com ressor the vapors of refrigerant mixed w1th lubricant, a condenserconnected to the shell and mounted to revolve therewith, said shell having means establishing communication between the condenser and the separator, and cupshaped, interengaging batile members provided in the shell within the means estabA lishing communication.

29. In a rotary refrigerating machine, a revoluble shell, a compressor within the shell operable by the movement thereof, means within the shell for supplying lubricant to the moving parts, an evaporator in communication with the compressor through said shell, a valve controlling the communication between the evaporator and the compressor, a condenser in communication with the compressor through said shell, said valve controlling also the communication between the compressor and the condenser, and a reliefl valve associated with the compressor adapted to establish communication between the compressor and the separator independently of the first-mentioned valve.

30. In a rotary refrigerating machine, a revoluble shell, a compressor within the shell operable by the movement thereof, an evaporator revolving with the shell, said shell having passages establishing communication between the compressor and evaporator, a valve controlling the communication, a condenser revoluble with the shell, said shell having passages establishing communication between the condenser and the compressor, said valve controlling also the communication between the compressor and the condenser, and a relief valve adapted to establish communication between the compressor and the discharge leading from the compressor to the separator independently of the first-mentioned valve controlling the communication therebetween.

31. In a rotary refrigerating machine, a revoluble shell having a radial bore, a piston in said bore, a counterweight Within said shell, a connecting rod from the piston to the counterweight, a head closing the end of the bore at the periphery of the shell, and a disk valve in said head for controlling the inlet to and the outlet from said bore at the periphery thereof.

In a rotary refrigerating machine, a revoluble shell having a radial bore, a piston in said bore, a counterweight suspended within said shell, a rod connecting the piston to the counterweight whereby in the rotation of the shell the bore reciprocates on the piston, a head closing the end of the bore at the periphery of the shell, said head having an annular passage forming an inlet to the bore, said shell having passages leading to the head and constituting the outlet from the bore, and a disk valve for controlling the inlet and outlet from the bore, said disk valve having a central opening which is adapted to establish communication between the bore and the annular opening in the head, the margin of said disk valve controlling the openings leading from the shell to the head and constituting the outlet from the bore.

33. In a rotary refrigerating machine, a revoluble shell having a radial bore, a piston in said bore, a counterweight mounted to oscillatewithin the shell in the axis of rotation of said shell, a crank pin in said counterweight eccentric with the axis of rotation, a rod connecting the piston to the crank pin, a head closlng the end of the bore at the periphery of the shell, and a valve in said head for controlling the inlet to and the outlet from said bore.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

WILLIAM S. STAIR Witnesses:

FREDERICK W. KELLEGRUW, WILLIAM J. ORRoK, Jr.