US1613549A - Reversing mechanism - Google Patents

Description

1,613,549 Jan- 4 1927 E. J. WEsTMoRl-:LAND

REVERSING MECHANI'SM 2 Sheets-Shea?l 1 Filed Nov. 1l, 1925 Wgr-mess:

Patented dan. 4, 1927.

narran STATES Partnr 'irrite-s.

ERNEST Josnrn WEsTMo'RnLAND, or BRADENTOWN, rLoarDA.

REVERSING Application filed November tion ivill lie-better understood when the tollowing detailed description is read in connection with the accompanying drawings, the invention residing in the construction, combination and arrangement of parts as claimed. Y

in the drawings forming part of this application like numerals ot reference indicate similar parts in the several views, and wherein l `igure 1 is a sectional view showing one position ot the reversing valve With relation to the cylinder and the steam chest.

Figure 2 is a similar view showing the adjusted position ot the valve.

Figure 3 is a plan view of the valve.

Figure 4 is a sectional view on line -1-4 of Figure 3.

Figure 5 is a sectional vien7 on line 5 5 of Figure 3.

Figure G is a sectional vieiv on line 6 6 of Figure 3.

Referring to the drawings in detail, 10 indicates a cylinder in which the piston 11 is arranged to reciprocate being connected to the usual piston rod 12. The cylinder has steam ports 13 and 14 respectively arranged adjacent the opposed ends thereof, and through which the steam is admitted and exhausted from the cylinder in the usual manner. The steam chest is indicated at 15 and is formed with a central exhaust port 16 and steam ports 17 and 18 arranged at opposite sides ot the central port 1G, and through which lports 17 and 18 steam is admitted to the cylinder. A valve 19 ot Well known construction is arranged to reciprocate Within the steam chest 15 to control the ports 16, 17 and 18 respectively. It will be noted upon inspection of Figure 1 that the steam chest 15 is arranged above a valve chamber 20, the said chamber being` interposed between the steam chest 15 and the cylinder 10, so that communication between the steam chest 15 and said cylinder is through this valve chamber 20.

The present invention resides in the pro- `1VIECHANIS1VL j 11, 1925. Serial No. 68,381.

visionot a reversing` valve ot the character clearly illustrated in liligures 3 to 6 inclusive, and which valve is=arranged to reciprocate Within `the chamber20. 1' This valve is indicated generally vat 21and isconnected with a rod 22 which terminates Within convenient reach o'tthe engineer, sothat Vthe valve 21 can he conveniently operated when its use is'desired. "The valve as shown is provided Withpassagesf22 and 23respectively which are arranged adjacent the opposed ends o the valve, and also Within oppositely disposed inclined passages 24 and 25 respectively, fthe opposedends of which communicate with passages 26 and 27 respectivelyj By shifting L'the valve within the chamber 20, the said passagesor valves can be selectively used to admit the steam or motive agent int-o either end of the cylinder 1() as will be readily understood. For instance, the valve 21 normally occupies the posit-ion shovvn in Figure 1, so that the steam Ytrom the. steam chest 15 can pass through the various ports, and the passages 22 and 23 of the valve when the engine is operated in the usual manner. In this figure, it will be noted that the steam from the chest 15 enters the port 17, passing through the port and passage 22 of the valve into the port 13 of the cylinder adjacent one end thereof to drive the piston in one direction. Vhen the piston is moved through the cylinder, the steam at the other side of the piston is eX- Ahausted through theI port 14 of the cylinder, the passage`23 of the valve, the port 18 oi the steam chest under the valve 19 and into the centrally disposed exhaust port 16. When the valve 19 is shifted in the opposite direction to uncover the port 18 and close the port 17, the steam from the chest 15 is admitted into the other end of the cylinder through the port 18, passage 23 of the valve and port 141 ot the cylinder, the steam being exhausted from the other end of the cylinder through the port 13, passage 22 in the valve, and the port 17 under the valve 19 and through the exhaust port 16. This is the usual operation and will therefore be readily understood.

When it is desired to reverse the engine, the valve 21 is called into use, and is shifted from its normal position shown in Figure 1 to it-s active position shown in Figure 2, wherein it Will be noted that the passages 22 and 23 are moved out of registration with any of the abovel mentioned ports. How- (iii il t) Y the central exhaust port 16.

ever, the passages 26 and 27 are arranged in registration with the ports 13 and 14 of the cylinder and ports 17 and 18 of the steam chest. The valve 19 in Figure 2 occupies the same position as thatshown in Figure 1, so that when the steam passes from the chest into the port 17, it enters the inclined passage 24 of the valve, which passage conveys the steam into the port 14 of the cylinder, thereby admitting steam into the end of the cylinder reverse from the arrangement shown in Figure 1. The steam is eX- hausted from this cylinder through the port 1 3 and inclined passage 2.5 of the valve 21, through the port 18 of the steam chest into Of course, it the valve 19 is shifted to uncover the port 1S the steam passes through this port 18 and the, inclined passage 25 of the valve to be admitted `into the opposed end of the cylinder to reverse the movement of the pist-on.

TWhile it is believed that from the foregoing description, the nature and advantages of the invent-ion will be betternnderstood when the following detailed description is read in connection with the accompanying drawings, the invention residing in the construction, combination and arrangement of parts as claimed.

Having thus described the invention, I claim:

The combination with a cylinder having steam ports adjacent the ends thereof, a steam chest having a cent-ral exhaust port and ports at either side thereof, and a valve controlling said ports, of a valve chamber interposed between the steam chest and cylinder and in open communication therewith, and a slide valve arranged to operate in said chamber and designed to direct the steam from said chest into either end of the cylinder, said valve having transverse passages adjacent the ends thereof and normally in registration with the ports of thel steam chest und cylinder, and oppositely inclined pasextending longitudinally of the valve, each inclined passage opening at opposite sides of the valve, and adapted to register beth with the adjacent port of the cylinder and with the; adjacent port of the steam chest when the valve is shifted in one direction lior the purpose specilied.

ln testimony whereof I aiiix my signature.

ERNEST JSEPH WESTMRELANE).

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