US2339965A - Track sander for locomotives - Google Patents

Description

Jan. 25, 1944.} e. SITURNER TRACK SANDER FOR LOCOMOTIVES Filed Nov. 5, 1942 Patented Jan. 25, 1944 TRACK SANDER FOR LOCOMOTIVES Guilford S. Turner, Chicago, 111., assig'nor to Morris B. Brewster 00., Chicago, 111., a corporation of Illinois ApplicationNovember 5, 1942, Serial No. 464,573

2 Claims. (01. 291-16).

The invention relates to track sanders for locomotives. j

It is now common practice to provide sand-traps provided with nozzles for delivering air under pressure to discharge sand from the trap and through a pipe for delivering sand to the rails y and also with ducts for short clean-out blasts .directly into the delivery pipes at the beginning and end of each sanding operation and to control the air from the nozzle and for the clean-out blast from a single manually controlled operator's valve. These operators valves have been constructed to initiall control the delivery of air to the clean-out ducts or nozzles in the traps and in succession to the sand-discharge'nozzles during a single continuous movement of the lever on the operators valve. In practice it has been found that the turbulence produced, in the sandtraps by the clean-out air prior to the delivery of air to the sand delivery nozzles frequently causes the sand to work back into the air line from the trap to the operating valve. into the operating valve when the latter is of the disk type is likely to reach the contacting surfaces of the disk valve and its seat and produce cutting of said surfaces or to render the valve inefiicient.

The primary object of the present invention is to provide track sanding equipment of this type which comprises an operator's valve of the disk type which is provided with ports for successively controlling the delivery of compressed air to the clean-out and sand delivery nozzles and which is provided with simple and eiiicient means in-the operators valve for causing a sum'cient but restricted flow of air to the sand delivery nozzle while, and preferably before, air is delivered 'to the clean out duct to produce sufii'cientcounter pressure on the trap to prevent any sand from being forced back from the trap and through the Sand so forced back sand delivery nozzles and the clean-out ducts of apair of sand-traps.

Fig. '5 is a. view of the face of the valve disk which fits against the valve seat in the casing, rotated into position to commerce the delivery of air to the clean-out ducts, the outlet ports in the casing being shown on dotted lines.

Fig. 6 is a section taken on line 6-6 of Fig. 3.

The invention is exemplified in sanding equipment which comprises a'sand-trap 8 which is provided with an inlet leg for receiving sand from a'pipe 9 to which sand flows from a sand box in the dome of the locomotive, as well understood in the art. The trap is provided with an outlet 10 for sand to which is connected a pipe H for conducting sand to a track rail. A noz- 21c 12 in the sand-trap is adapted to deliver air under pressure into the trap conduit to dis- 0 into pipe ll.

outlet -connections leading from the valve casing to the pipes for delivering compressed air to the charge the sand through the discharge duct I a An air pipe l3 from the operators valve is connected to the casing of the trap to deliver air to the nozzle I2. A duct or nozzle I4 is formed in the casing 8 to direct a clean-out blast into the pipe II and a pipe I5 conducts air from the operators valve to said duct M.

The operators valve illustrated is adapted to control the supply of compressed air to thesand delivery nozzles l2 and the clean-out ducts M of a pair of traps, only one of which is shown. This valve comprises a casing or body composed of an inlet section I 8 and an outlet section I9 which are fixedly secured together by bolts 2c. The inlet section I8 is provided with a chamber to which an inlet pipe 22 i connected for compressed air from a supply tank, as well understood in the art. The outlet section IQ of the casing has connected thereto a pair of pipes l3 for conducting an to the sand delivery nozzles 112 of a pair of traps 8, and a pair of pipes i 5 tor conducting air from the operators valve to the clean-out ducts M of a pair of sand-traps 8. The inner face 23 of the casing section !9 is ground to form a flat seat for one face of the "valve disk .25 which controls the flow of compressed air from the inlet section Hi to the outlet section IQ of the valve casing. A spring 26 is interposed between casing section l8 and a stud 2.! which engages the disk 25 to hold the disk against the seat 23. A pair of ports 28 are formed in the outlet section H) of the casing which extend radially in and lead from the face 23 which forms the seat for the valve disk 25 to the pipes l3 which conduct compressed air to the sand delivery nozzles [2 respectively. A pair of ports 29 in the outlet section I!) extend radially in and of the valve casing for delivering air to the sanddelivery nozzles I2, and with a pair of radially extendin outwardly divergent through ports 3F which are adapted to register with the ports 29.

in the outlet section of the casing when the disk has been rotated approximately 22 /2--from 'itsnormal position. A stem 32 is journaled'inthe outlet section I 9 of the casing and provided with a head 33 which fits in a socket in' the-disk 25;

and is adapted to rotate said disk. A lever 34 fixedly secured to the outer end of stem 32' and the casing section 9 is provided with stpp ss35 from limiting the throw of the leve'rito substantially 45".

A spring pressed detent or rollerg34 is slidably mounted in the handle lever 3 4Tan'd is adapted to enter notches 'in the casing. sectionl9 for yieldingly holding the lever 34 and disk 25 in normal and sanding positions. When the lever 34 is in its normal position all ofv the ports' in the valve seat 23 I will be 7 closed by disk 25. When the lever 34 is shifted to its sanding position the ports 3| in the disk 25 will first uncover the ports 29 in the outlet section I9 f the casing and compressed air will pass through ports 29 and pipes I to the clean-out ducts I4 of the sand-traps and further movement of the hand lever will rotate the disk to cover the ports 3| and bring the ports 30 in disk 25 into registry with the ports 28 in casing section I9 and cause compressed 'air to flow through pipes I3 to the sander nozzles I2 in the traps. y

The valve disk 25 is provided with a .pair'of small holes or through ports which communi cate with small arcuate grooves 31 formed in the face of the disk 25 which engages the seat 23. The grooves 31 extend arcuately in the face of the disk 25 a sufficient distance so that they will lap the ports 28 preferably slightl before or as soon as the ports 3| in disk 25 admitair to the ports 29 through which air flows to thecleanout nozzles and to continue the restricted stream of air through ports 36 and grooves-3] tothe ports 28 through which air flows to the sand delivery nozzles until after ports 3| in thedisk 25 have passed and closed ports 29 and discontinued the supply of air to the clean-out ducts. '7 As a result, during each full stroke of the lever 34 and its corresponding rotation of disk 25 arestricted stream of air will flow through ports '36 and grooves 31 to the sand delivery nozzles prior to, during, and shortly after the clean-out blasts ports 3| to ports 29, during the flow of air through ports 3| and 29, and if desired slightly after said ports 29 have been closed, by the continued movement of the disk and before the air flows through ports 30 and 28 to the sand delivery nozzles a restricted and suificient flow of air will flow through holes 36 and grooves 31 from the cham- :beij ;I2-|;-' to the ports 28 to deliver a restricted and suifi'cient flow of air to the sand-delivery nozzles to counteract the air from the clean-out ducts and thus prevent the sand in the traps from beingforced bapkwardly through the pipes I3 into the valve section" I9 and against the working face of the'disk,251 --The invention exemplifies simple and efficient means for controlling, during a full stroke of an operatorfsvalve, vthe successive delivery of compressed air to the clean-out nozzles and the sand deliverynozzles, and for producing a small but sufficient flow of compressed air to the sand delivery nozzle to oppose and prevent the'clean out blasts. fromjforcin air through the sandernoz- 'zles to'the operators valve. This means is simple in'construction an'd'can be easily applied to operators valvesof the disk type which are now in use;

;The invention is not to be understood as restricted to'the details herein set forth since these may be modifiedwithin the scope of the appended claims without departing from the spirit and scope ofthe invention.

which are controlled by the ports 3| in the disk After said stream is cut off the ports 30' will register with ports 28 andsupply air to the nozzles as long as the handle 34 is left in its" claim as new 'Havin'g thus described the invention, what I anddesire to secure by Letters Patentisz" 1. An operator svalve for manually controlling the deliveryof compressed air to the sand-discharge nozzlean'd a clean-out duct of a sand trap comprising a casing provided with a chamber supplied with compressed air, a face forming a "seat, anoutlet'port leading from said face for supplying air-tothe sand-discharge nozzle and an outlet port leading from said face for supply;-

ing a blast of air'to the clean-out duct, a manually rotatable valve disk fitting said seat and provided with separate -through-ports arranged to register in rotative succession with the outlet port to the nozzle and the outlet port to the cleanout duct, and means in the disk for delivering a ;restricted flow-of air to the. outlet port to the sand-discharge nozzle during the delivery of air tothe clean-out duct and before the disk is rotated into' position for delivering the blast of air to the nozzle.;-,

2, .An operators valve for manually controlling the,.de1ivery, ofcompressed air to the sand-discharge nozzle and a clean-out duct of a sand trap comprising a casing provided with a chamber supplied with compressed air, a face forming a .seat, -an.;outlet.;port leading from said face for supplyihg'aintq the sand-discharge nozzle and anoutlet port leading from said face for supplying a blast of air to the clean-out duct, and a manually rotatable valve disk fitting said seat, provided with through-ports arranged to register in 'rotative succession with the outlet ports to the nozzle and to the clean-out duct, and with a restricted port through and a channel in the face on the seat for delivering a restricted flow of air to the outlet port to the sand-discharge nozzle during the-delivery of air to the clean-out duct and before the disk is rotated into position for delivering the blastof air to the nozzle.

GUILFORD S. TURNER.

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