Патент USA US2409729код для вставки
Oct. 22, l w_ A. BALDWlN ` Y 2,409,728 SANDER Filed May 15, .1944 _ g- Í 29 -1 § ßnventor ' Gttornegs 2,409,728 Patented Oct. 22, .1946 .UNITED STATES PATENT» - OFFICE ' - ~ ‘ p ‘ “ * . ` 'arcanes I ï" ` -SANDER ` ‘ ’ ` ' , ` Wayne A. Baldwin, Watertown, N. Y., assignor to ' The New York Air Brake Company, a. corpora tion of New Jersey Application May i5, 1944, serial No. 535,631 2 Claims. î 1 . This invention relates to Sanders, particularly sanders foruse on locomotives. ` ' ‘ Where sanders are mounted on the side of the boiler of a steam locomotive below the sand box it is sometimes necessary to provide distinct forms of sanders (i. e. rights and lefts) for the (Cl. 291-11) 2 portion of the body 6 and delivers sand flowing from the sand box (not. shown) to the interior of the trap body E. `The sand ñows beneath a depending barrier I-I which serves to limit the height to which sand will rise in the body 6 by gravity flow. The cover 1 is formed with a pas sage I2 through which stirring air is drawn into the trap from the atmosphere. The entrance One feature of the invention is the arrange flow of air is caused by the ejector action which -ment of the sander so that it can be assembled in two different ways and thus produce either a 10 draws sand and air from the trap. Entering air flows from `the passage I2 into a righthand sander or a lefthand sander. ` stirring tube I3 which is pressed into a porton Another feature of the invention is the use of the inner face of the cover 1. The tube I3 has a self-sustaining Venturi ejector assembly which at its top a narrow longitudinal slot I4. The air may be mounted in the sander body in two differ thus flows partly through the slot I4 and agitates ent positions to effect the reversal above men the sand so that the sand is carried at a proper tioned. The ejector assembly includes a sustain rate to the Venturi throat. ing tube having positive positioning means and To limit the stirring action to the proper ín a lateral port which cormnunicates with the sand tensityIby-pass port I5 leads from the passage chamber of the trap body. At the outlet end of two sides of the locomotive. ' this tube there is aV removably mounted Venturi 20 I2 to the space within the trap above the level of the sand. Increase in the size of the port I5 throat'whi‘ch is desirably formed of rubber and diminishes the effectiveness of the stirring action. which may be variously dimensioned to suit par The body ‘6 is formed with two similar tubular ticular conditions.' This interchangeable throat extensions I6 and I1. These are aligned with one has va projecting end which performs a secondary another »as best shown in Figure 3 andreceive the nozzle assembly which may be inserted from either end. This assembly is housed in and sustained by a tip which coordinates certain related factors, the tube II8 which is encircled by aligning ribs dimen size of the nozzle port, the character ofV an en trance strainer which protects the nozzle port, 30 sioned to ?t the bore of members I6, I1. The tube I8 has a positioning flange I9 arranged to and a rim which encircles the nozzle port and er1-gage the end of extension I6 or I1 as the case controls the width of the entrance aperture may be. Near the flange the tube I8 is provided through which sand reaches the Venturi throat. with a positioning pin 2| which engages one of Thus it is possible to manufacture the nozzle tip the notches 22 or 23 formed in the extensions IB in various sizes in which the dimension of all and I1 respectively. The purpose of the position functionally related parts are coordinated. ing pin 2| is to assure that a lateral port 24 The preferred embodiment of the invention is formed in the tube I8 is presented downwardly. illustrated in the accompanying drawing, in This port 24 then communicates with the cham which Figure l is an elevation of the trap as it would 40 ber within the body 6. Threaded into the entrance end of the tube lI8 appear on the righthand side of the locomotive is a nozzle tube 25 into the outer end of which boiler with the air supply connection toward the the air supply pipe 26 is threaded after the sand cab, that is toward the rear end of the locomotive, trap has been mounted on the locomotive." A lthe sand discharging connection leading forward 45 nozzle tip generally indicated by the numeral 21 from the tra-p. is threaded into the inner end of the nozzle tube Figure 2 is a vertical section on the medial 25. This has a jet nozzle port 28 surrounded by plane of the trap. a rim 29. At its rear it has a tubular extension Figure 3 is a section on the line 3--3 of Fig 3| which Vis cross-drilled as indicated at 32 to ure 2. The body of the trap is made up of two parts, 50 serve as a strainer. The cross-drilled ports 32 are smaller than the jet nozzle passage 28 and the body proper 6 which is open at the front, and so protect it against clogging. A removable plug the cap 1 which is connected to the body 6 by 33 closes the rear end of the tip unit and may be studs and nuts 8, and serves to close the open> function in that it serves as a sealing gasket. Also removably mounted‘in the tube is a nozzle assembly. This nozzle assembly has a removable front of the body. Sand supply pipe 9 is threaded into the upper 55 removed on occasion. ` Mounted in an annular seat formed in the dis 3 2,409,728 charge end of tube I8 is a Venturi throat 34 preferably formed of rubberlike material and shaped to project beyond the annular nut 35 Which clamps it in its seat. There is a union fitting 36 which seats against the end of extension I1 (when the parts are as sembled as shown in Figure 3) and is held by a union nut 31. The ñtting 36 also seats against the end of the Venturi throat 34, which thus 4 been described in considerable detail this repre sents merely the best known embodiment of the invention and is intended to be illustrative and not limiting. .What is claimed is: 1. In a sand trap, the combination of a body having a sand-inlet connection, a sand-retaining chamber to which said connection leads and an open-ended transverse passage intersecting said functions as a gasket to produce a tight seal. A 10 chamber; an ejector assembly insertable into said union nut 38 identical with nut 31 is shown passage in relatively reverse positions from re threaded on the end of extension I6. Sand dis spective ends thereof, said assembly comprising charge pipe 39 is connected to the ñtting 3E and a jet nozzle with air supply connections, and a leads to the rail. ' ` Venturi throat of rubber-like material and a sus It Will be apparent that the tube I8 positions taining sleeve serving to position said nozzle and the nozzle and the Venturi throat and thus forms throat in iixed coactive relation and so that the a complete self-sustaining unit. This unit may end of the throat is exposed at the end of the be inserted into the aligned bores of extensions sleeve; a sand-discharge connection; and means I6 and I'I from the left as shown in Figure 3, or it operable interchangeably to connect the air sup may be inserted from the right. In the latter 20 ply end of the assembly to the body, and to con case the nuts 31 and 38 are interchanged, the nect the sand discharge connection to the body nut 38 engaging the tube I8, and the nut 31 and seal it against the exposed end of the Ven the union ñtting 36. In this Way the trap may turi throat. be assembled as either a righthand or a lefthand 2. In a sand trap, the combination of a body trap prior to the connection of the pipes 26 and 25 having a sand-inlet connection, a sand-retaining 39. chamber to which said connection leads and an Removal of the cover plate 'I gives access to open-ended transverse passage intersecting said the trap chamber and withdraws the stirring noz chamber; an ejector assembly insertible into said zle I3. No claim is here made to this detail passage in relatively reverse positions from re which is the invention of another. rI‘he discon 30 spective ends thereof, said assembly comprising a nection of pipe 26 and release of nut 38 permits tube having positioning means to engage the body the removal of the tube I8 with all the ejector and position the tube when the tube is inserted in parts. After such removal these parts may be either direction into said passage and a lateral removed individually from the tube I8 and port then so located as to communicate with said cleaned or replaced as occasion may demand. 35 chamber, a combined jet nozzle and strainer re This makes it possible to associate any desired movably mounted in'one end of said tube and type of nozzle with any desired type of Venturi terminating adjacent said port, and a Venturi throat. throat removably mounted in the other end of Since the nozzle tip 21 is interchangeable, the said tube beyond said port; a sand discharge con imple interchange of tips controls the coordina 40 nection; and two threaded connectors, one asso tion of the size of the strainer ports 32 with the jet ciated with each end of said passage, and either nozzle port 28. The height of rim 29 can be adapted to ñx said tube in the body While the chosen to control the sand entrance passage to other connects the sand discharge connection the Venturi throat. with the Venturi throat. While one embodiment of the invention has 45 . WAYNE A. BALDWIN.