Патент USA US2092935код для вставки
Sept. 14, 1937. , _A. c. SMITH _ _ 2,092,935 FLOAT VALVE Fiiedoct. 1, 1934 2 Sheets-Sheet 1 sept.f14,1937. y 1 ' ¢, SMITH 2,092,935 „40; ATTORNEY. Patented Sept. 14, -1.937 ' ‘s 2,092,935 UNITED STATE-s ylearizrrr OFFICE ` 2,092,935 FLOAT VALVE Albert C. Smith, Evansville, I Ind., assignor, by mesne assignments, to Servel, Inc., Dover, Del., a corporation of Delaware » `Application October 1, 6 Claims. My invention relates tozrefrigeration-and more particularly to an absorption type refrigerator operated by a liquid fuel burner. „ ' It is an object of my invention to provide a re C41 frigerator of this type having a temperature ad justment means accessible to the user. ' Another object is to provide a liquid fuel burn er for an absorption type refrigerator having an adjustment means which is simple and accurate. assembly 2I having a removable chimney or com bustion shield 22 >which `extends upwardly into the forwardly projecting end of the louter heating flue I 8 which is provided with a cutaway portion or recess 23 to admit the upper end of the chim ney 22. The forwardly projecting end of the iiue I8 `and the upper end of the burner chimney 22 are enclosed by a removable thermally insulated hood 24. For a more complete description of this I attain these objects by utilizing a liquid fuel ’ assembly, reference maybe had to an applica burner regulated by a float valve for heating a generator of an absorption type refrigerator, and provide for gradual adjustment of the burner ñame and, thereby, the refrigeration temperature, by fine adjustment of the float valve operation. I may do this, for instance, by adjustably weight ing the burner float' with a ñexible weight ele ment such as a _chain which I herein generically term a weight string. My invention will be more fully understood upon consideration of the fol lowing description and the accompanying draw ings forming part of this specification Aand of which: » _ . Fig. 1 is a broken side elevation, with parts _broken away, of a refrigerator embodying my in - vention; and . » , Fig. 2 is a detail view, partly in vertical section, of a liquid fuel burner for the refrigerator shown. in Fig. 1. p . Referring to Fig. l of the drawings, a refriger -ator cabinet I8, itself of known construction, in cludes a thermally insulated storage compart 10 tion Serial No. 734,075 of William R.. -Halnsworth.‘ In the other side of the lower apparatus com partment I3 is a storage tank or reservoir 25 vfor liquid fuel, such as kerosene. Liquid is con ducted from the reservoir 25 to the burner 2I through a conduit 26. ' 15 - The construction of the burner 2 i may be best _ understood by reference to the detail section in Fig. `2. The burner assembly includes a safetyv valve 2l, a float valve 28,’a float chamber 29, a burner tube 30, an annular burner well 3|, and 0 the removable chimney 22. Liquid fuel flowing to the burner through conduit 26Ipasses through the normally open safety valve 21 and a conduit 33 into a valve chamber 34. Flow of liquid fuel from the chamber 34 into the Íloat chamber 29 is regulated by the float valve 28 to maintain a substantially constant level of liquid in the _float chamber. -The iioat chamber 29 includes a por - tion formed by a float .vessel 35 in which is conf tained asuitable iloat36. The float 3.6"is oper 30 . atively connected to the valve 28 by means of a4 ’ ment II accessible by 4means of a door I2, anda` rod or valve stem 3l.- The iioatSB may be pro-.V lower _apparatus compartment I3 accessible by vided with a recess 38 in thetop thereof forv ay means of a downwardlyvopening,,hinged door I il purpose which will hereinafter appear. ,The float .~ 35 or other suitable closure member. An absorption vessel 35 isl provided with a suitable> cover 39 refrigeration apparatus which may be of the gen- ' having an openingJlû in the top thereof, over the eral type disclosed 'in'Patent 1,609,334 to Von* recess 38 in the float 3B. "Liquid` ilows from the includes a cooling element or evaporator I5 in float chamber 29 toward the annular burner well Platen, et al., is mounted in the cabinet Ill and . 3Ithrough the burner tube30Í and stands in _the the storage compartment I I and a generator hav I burner tube '30- substantially at the same level as ing a substantially horizontal portion I6 in one that in the float chamber. The chimney 22 side of the lower apparatus compartment I3. The horizontal portion I6 of the generator is l5 provided with a Vsubstantially horizontal inner heating flue `I'I extending therethrough and is surrounded by an outer heating ?lue I8. The latter is surrounded by suitable thermal insulat ing material I9, such as mineral wool, retained `0 in place by a light sheet metal casing 20. 'I'he forward end of the heating flue I8 projects be yond the front end of the casing 20 and also be yond the end of the inner heating ñue I1. _Be neath the forwardly projecting end of the Aouter 5 -heating ñue I8 is mounted a liquid fuel burner which is removably supported above the burner well 3| comprises a pair of perforated concentric cylinders 4I and 42, forming an annular combus tionspace above the annular burner well 3|, and an outer shield or chimney comprising a frusto conical shell ¿53.> 'I'he cylinders 4I and 42 and the chimney 43 are retained in their assembled positions by perpendicular bars 4'4 and pins 45. The float 36 and valve 28 are constructed to normally maintain a' substantially constant level of liquid in the iioat chamber 29 and the burner tube ,30, -for instance, at the level L. At this level the burner produces a relatively small ña'me, 55 2,099,935 herein referred to as the minimum flame. It will be understood that the burner flame and, there fore, the heat produced by the burner may be ment of the refrigerator temperature. The knob 6| may therefore be referredto asa temperature adjustment. Various changes and modifications will be apparent to those skilled in the art, wherefore my 5 burner tube 30. is not limited to that which i's shown in In accordance with my invention, I provide a .invention the drawings and described in the specification » suitable weight string such as a chain 46. Refer ring to both Figs. 1 and 2 of the drawings, the but only as indicated in the following claims. What I claim is: chain 46 is suspended over pulleys 41 and 48. lincreased by raising the level of liquid- in the 10 The pulley 41 is located over the opening 40 in the float vessel cover 39 so that one end of the chain'- may depend through the opening 40 di rectly above the recess 36 in the float 36. The pulley 48 is located over a spindle or stub shaft '15 49 so that the other end of the chain 46 may be secured to the stub shaft in such a manner as to 1. In a kerosene burner for absorption refrig 10 eration apparatus, a float chamber, a valve for regulating iiow of -kerosene to said float chamber, a iioat in said chamber operatively connected to said valve, a weight string movable for deposit .of variable length thereof on said float, and means 15 for moving said string'. . \` become wound and unwound-upon turning of the « l 2. In a kerosene burner for absorption refrig shaft inopposite directions. The shaft 49 may be suitably journaled in the front of a shield plate 20 59 which laterally surrounds the burner assem bly 2I. A suitable knob 5I is provided for turn ing the shaft 49 to wind and unwind the chain ` 46. ‘The stub shaft 49 may be extended through the front of the shield 60 and the knob 5l secured 25 on the end of the shaft outside of the shield so as to be readily accessible from the front of the refrigerator, as illustrated. It will now be understood that turning the knob 5| to unwind the chain 46 allows the other end 30 of the chain to descend into the recess 38 in thetop of the float 36 and add its weight to that of the float. If 'the weight of that portion' of the chain 46 below the pulley 41 is not suñlcient to carry the weight of the chain between the pulleys 35 41 and 43, a weight W may be added to the chain 46 below the pulley 41 to insure deposit of the chain upon the float 36 upon> unwinding of the chain when the knob 6l is turned. 'I‘he addi tional weight of that portion of the chain 46 rest 40 ing upon the float 36 results in a greater displace ment and a sinking of the float, and a higher level - of liquid in the float chamber 29 is necessary to eration apparatus, a float chamber, a valve for regulating flow of kerosene to said float cham ber, a float in said chamber operativelyconnect 20 ed to said valve and having a recess in the'top thereof, a weight string having one end depend ing into said recess and movable for deposit of variable length -thereof therein, and means for moving said string. 25 3. In a kerosene burner for absorption refrig eration apparatus,l a iioat chamber, avvalve for regulating flow of kerosene to said float chamber, a float in said chamber operatively connected to said valve and having a recess in the top thereof, 30 a chain having one end depending into said re cess and movable for deposit of variable length thereof therein, and means for moving said chain. l ‘ 4. In a kerosene burner for absorption refrig 35 .eration apparatus, a float chamber, a'valve for regulating flow of kerosene' to said’fioat cham ber, a ñoat in said chamber operatively connected to said valve and having a recess in the top there of, a chain having one enddepending into said recess and movable for deposit of variable-length thereof therein, and rotatable means connected raise the float suilicientlyvto close -the valve 26. " to the other end of said chain for moving the A higher liquid level is therefore maintained in latter. 5. A liquid fuel burner for absorption rei‘rig-V 45 the float chamber and burner tube 36 and a cor eration apparatus and having regulating means respondingly greater burner flame is produced. By suitably providing one or more stops' 52 for ' including a iloat, and means for increasing and the knob 6l, the amount of chain deposited upon decreasing the weight of said float comprising a the float 36 may be limited to that required for flexible member constructed and arranged to be 50 producing the desired maximum flame. which deposited on said float in various amounts. results when the liquid level is at some higher 6. A liquid fuel burner for absorption refrig Alevel such as that indicated by the level line H. eration apparatus and having regulating means By. turning the knob 5I intermediate the stop or including a float, means for increasing and de stops 62, the liquid level in the burner tube and creasing the weight of said ñoat comprisinß a 55 therefore the burner flame may be adjusted be iiexible member constructed and arranged to between its maximum and minimum values. Since deposited on said float in various amounts, and the temperature of the refrigerator cooling ele a rotatable member for manipulating said fiex- _ ment I5 may be changed by changing the heating ible member. of the generator I6, adjustment of the burner 60 flame by turning the knob 6i results in adjust ~ ’ _ ALBERT C. SMITH.