US1263722A - Locomotive sanding device. - Google Patents

Description

Patented Apr. 23, 1918.

W. H. WHITE.

LOCOMOTIVE SANDING DEVICE. APPLICATION FILED JAN. 19, 19l8.

LIIIAM H. WHITE, OF ROANOKJE, VIRGINIA, ASSIGNOR T0 WHITE AMERICAN LOCO- a: TION 01E VIRGINIA.

IIOGOMOTIVE SANDING- DEVIGE. j

' Specification of Letters Patent.

Fatenteditpr. 23, rare.

Application filed January 19, 1918. Serial No. 212,546.

tion wheels of locomotives or the like and.

among the objects thereof is to provide improvements in sanding devices whereby neither the sand trap, the pipes, nor any of the appurtenances will become stopped, and also to provide with a special form of sand trap a suitablecontrol valve therefor.

With these general and other objects in view the invention consists of the formation, combination and the arrangement of parts as will be herein described and particularly as set forth'in the appended claims.

In the drawings which accompany and form a part of this specification, Figure 1 is a partial side elevational view. of a loco-I motive having the elements, of my inven tion applied thereto in connection with other portions of the sanding equipment. Fig. 2- is a longitudinal section taken through my especial form of sand trap and showing also the control valve and connections in their relationship to the trap. Figs. 3-and 4 are transverse sections through the control valve showing the same in difierent operat ing positions. Fig. 5 is a side elevational view of the control valve. Fig. 6 is another sectional view of the control valve showing the same .in sanding position. Fig. 7 is a slightly enlarged view of the partition across the air pipe leading to the discharge jet. Fig. 8 is a slightlyenlarged view of the delivery air jet. The scale of Fig. 7 is somewhat reduced over that of Figs. 2, 3, 4, 5 and 6.

Referring now to these drawings it is customary to equip locomotives with a sand box or dome 1, usually on top of the boiler; so that sand can be fed to the drive wheels 2 along either side of the machine. Leading from the sand box 1 is a pipe 3 which forms a part of and delivers sand to the one leg 4: of a sand trap 5, the trap being so arranged as to prevent the sand from falling or jarring to the rail when not desired.

Here the sand falls into the discharge leg 6 of the trap where it is effectively trapped and whence it may be discharged down the pipe 7- to the rail when desired. To carry the sand through the trap and as an aid to gravity in propelling the sand, a fluid pressure medium such as compressed air is used, this being piped as at 8 from the main air reservoir or any suitable source. A control valve 9 is located in this pipe and from the control valve two pipes 10 and 11 lead to the sand trap, the pipe 10 leading to a discharge jet 12 which is directed into and along the discharge leg of the trap and the pipe 11 leading to a cavity 13 in the trap. This cavity communicates at one end with a pipe 14 which extends upwardly into the pipe 3 and is closed at its upper end. This pipe is provided with. a plurality of downwardly directed and helically disposed holes 15 and thus comprises a delivery jet. Com- Pressed'air being supplied to this pipe 1 1 the same is jetted out these'holes 15 and the pipe 3 is thus kept free from stoppage and the sand is also caused to move downward into the discharge leg of the trap as needed.

The cavity 13 also communicates with an opening or jet 16 which directs a jet of air down the pipe 7 to clean the same and to prevent stoppage. The trap is so arranged that the plug 17 in the end of the discharge leg may be removed and the pipe 7 applied at this point, in case it is desired to so direct the pipe 7 around an obstacle, the plug being then replaced at the hole just vacated by the pipe 7. In this event the small plug 18 is likewise removed from the outer end of the cavity 13 and inserted in the jet opening 16 which is threaded for this purpose, thus properly directing the cleaning jet at all times into the pipe 7 I The control valve 9 is made as a plug cock having a hollow, rotatable plug 19 disposed centrally in a suitably chambered body 20, this plug cock construction being of the well known type. The body of the cock is provided with three openings, 21, 22'

To the central opening 22 is attached the fluid pressure supply pipe 8, to the one lateral branch at 21 is connected the pipe 11 and to the other lateral branch at 23 is connected the pipe 10. The hollow plug 19 is provided with three openings 25, 26 and 27, through its wall and these are so arranged that in one extreme position of the valve, ,(that shown in Fig. 8) all three of the openings will be blanked off with respect to the openings 21, 22 and 23. In the other extreme position of the valve, (that shown in Fig. 6) the hole 25 registers with the opening Q fl 22 and the hole 26 with the opening 23, and thus, through the cavity of the plug, communication is established between the pipes 8 and 10 and compressed air is supplied to the dischargenozzle'12 to deliver sand to the rail when desired.

In the air passage leading to the nozzle 12 and removed slightly from the inner end of the same there is provided a cavity or relatively enlarged expanding chamber 28 preferably of bowl shape, and the air is delivered to this chamber through a series of small holes 29 arranged circumferentially in a plug or partition 30 across the air channel. These holes are so arranged that the air is given a swirling or spiral movement in'the bowl.

This construction just described has been found to be more effective than a valve in preventing the creeping of sand into'the air pipe, and in expelling any sand which may have crept back through the nozzle 12 and into the passageway leading thereto.

' In passing from either extreme position of the control valve to the other as depicted in liigs. 3 and 6 the plugpasses throughthe position shown in Fig. 4 when the holes 25, 26 and 27 register fora moment with the openings 21, 22 and 23 respectively. This position is known as the cleaning position and it will be seen that air is now fed to the pipe 11 and thence to the delivery and cleaning'jets of the trap. At the same time it will be seen that a reduced amount of air will be given to the nozzle 12 through the relatively smaller hole 27 .in the plug of the valve. This gives enough air to the nozzle 12 and through the holes 29 to prevent sand being forced back into the nozzle when cleaning. It will also be seenthat the'trap is automatically cleaned both before and after each sanding operation.

The apparatus thus described forms an en tirely reliable and positive sand feeding mechanism, and while my improvements will produce the best results when combined with the other sanding elements shown and de-* scribed, yet I do not limit myself to the specific construction shown, as modifications therein may be made within the scope of the claims without departing from the spirit of the invention. 3

What'I claim is: 1. In a sanding device, a sand trap having three jets, a connected supply of fluid pressure therefor, and means for admitting the fluid pressure to one of the jets at one timeand to all three jets at another time.

2. In a sanding device, a sand trap-having three jets, a connected supply of fluid pressure therefor, and operative means for admitting the fluid pressure to one of the jets and for shutting it ofl therefrom, said means being arranged to momentarily admit the uid pressure to all three jets when being operated to either admit or to shut ofl the fluid pressure from the said one jet.

3. In a sanding device, a sand trap having a delivery jet, a discharge jet and a cleaning jet, a connected supply of fluid pressure, and means for admitting the fluid pressure to the discharge jet at one time and to all three jets at another time. a

4. In a sanding device, a sand trap having a sand-receiving leg and a sand-delivery leg, a propelling jet in the discharge leg, a delivering jet in the delivery leg and a cleaning jet in the discharge leg, a connected supply of fluid pressure for the jets, and means for admitting fluid pressuretothe propelling jet at one time, and to all three jets at another time.

5. In a sanding device a source of fluid pressure, a sand trap having a propelling jet and a cleaning jet, and a control valve for the fluid pressure connected ,7 with the sand trap and arranged to give a blast of fluid pressure to the cleaning jet immediately before and after each propelling blast, there being an independent connection also by which fluid pressure will be delivered to the propelling jet simultaneously with the cleaning blast. H

6. In a sandingdevice, a sand trap having a delivery jet, a discharge jet and a cleaning jet, a connected supply of fluid pressure therefor, and means'for admitting the fluid pressure in a normal amount to the discharge jet at one time and at another time to the delivery jet and to the cleaning jet in normal amounts and simultaneously therewith to the discharge jet in a sub-normal amount.

7. In a sanding device, a sandtrap having a receiving leg with a delivery jet therein, a discharge leg with a discharge jet therein and with a cleaning jet therefor, a supply of fluid pressure connected to the jets, and a valve located in the fluid pressure supply line and adapted when in one position to supply fluid pressure to the discharge jet in a normal quantity,- and adapted also, when being moved either into or out of said position to give a momentary supply of fluid. pressure to the cleaning jet and to the delivery jet, and simultaneously therewith to give a reduced supply to the discharge jet.

8. In a sanding device, a sand trap havin a receiving leg with a delivery jet therein, a

mess/a2 discharge leg with a discharge jet therein and with a cleaning jet therefor, a supply of fluid pressure connected to the jets with a control valve therefor, a pipe leading from the control valve to the delivery jet and to the cleaning jet and another pipe leading from the control valve to the discharge jet, the said control valve having a sanding position wherein fluid pressure will be admitted to the pipe leading to the discharge jet and another position wherein the fluid pressure will be entirely shut oil", the said valw'e being so arranged that in passing from either of said positions to the other a momental-y supply of: fluid pressure will be admitted tothe pipe leading to the delivery and the cleaning jet and simultaneously therewith fluid pressure will be admitted to the discharge jet pipe.

9. In a sanding device, a sand trap having a plurality of jets, a supply of fluid pressure connected to the jets, and a control valve for the same, the said valve comprising a plug cock having a hollow, central, rotatable plug and a cooperatively formed body, thesaid body having a supply connection and having two discharge connections each adapted to direct the fluid pressure to different jets of the trap, said connections being arranged at different positions around the said body, the wall of the hollow plug being pierced at three points adapted in one posltion of the plug to register with the supply connection and one of the discharge connections and to establish communication between the same, adapted in another position to blank off all of the connections, and adapted in an intermediate position between the two first mentioned ones to register with all of the connections and to establish communication between the supply and both delivery connections.

In testimony whereof I aflix my signature.

WILLIAM H. ITE.

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