US1124589A - Reversing-gear for locomotives. - Google Patents

Description

W. F. J. CASEY & G. GAVIN. REVBRSING GEAR POR Loomouvss. y

' APPLICATION FILED DBC.16. 419l3.

1.124.589.' I L .'-Patnteanlw 2 SHEETS-SHEET 1.

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WMA/Www W. F. J. CASEY & G. CALVIN. REVERSING GEAR POR LOGOMOTIVES.

APPLIGATION'FILED DEO.16,1913. y Ll. I Patented Jan.12,915.

z SHEETSSHBET 2.

esteso siteseiee 4e ossi "WILLIAM J'. CASE'ANE. GUSTYE CVIN; F KINGSTON, ONTARIO, CANQA, AS-

Segeescetion of Letters Iteteet. l

esteemed een. ie, wie..

y vented e. eeiteiiinew xand' useful improve@ ment iteveisiig-Geer to of erhieltk impi'ovomentthe specification;

' This inventionv iieletesto reversing geel for locomotives, andv is' en improvement on Locomotives, lowing is e,

the geef disclosed in. oiiif'piioi iatent 1,982,733, issued December 30, 1913.

'iliieolijeet ot'the present invention is to `mfoifide aneiitometic locking ineens which will hold the valve geei' absolutely rigid:

Another object is toi provide means whereby the handle ofl thecontiolve-lve will ymove in the seme diectiones the ordinary hemd reverse lever to produ@ similar i'esuits, so thetno confusion cen arise in the 1 engineers mind.

A stili fmthei* object is to ,pi'ovid'e e more perfectly balanced and easier ope'feting contiiol valve.

with the reversing geen described in our 'foi'mcif patent, there is e. certain liability to oonstent Working of the reversing device due izo-stresses hi'ought to hem by the'movement ci the -valve geeiwhen the engine is running. This/is most noticeable in high speedengines'end varies in ernennt accord ing as the device is adjusted to regulate the cut-o`of the valves.. it hes also heen "found f thet the hond lever of l'the contiol valve operating' in the opposite direction necessiteted the' changing of the Valve motioned Gentiles in cider 'to oiitein the same motion as the hond type ofi level?. Tl e' present invention overcomes these Idifficulties Iloy` pio' viding eiifentometic lock engaging; the piston rod. This'loeit is iaised by 'fluid piesemre eutometicelly admi ted from the con'-y trol valve et the commencementot its opeintioii.l yso that the 'piston rod is `n nloclnedion reciprocating movement just es the iuid is edmittedjthrough the volte toproduce f eiichmoverrient. ln order to have the hond levee moved in flic seme direction as the ordinary reverse levers it .is geen connected 'to the valve;

"in the di'ewine's which illusti'ete the inveiitionzig'urei is e oeitiel longitudinal of the control'v valve mechanism.

section of the operating cylinder showing the locking device attached thereto. Fig.

2'is e front elevation of the control valve complete. Fig. 3 is e front elevation of the valve with cover removed. Figli is a section on the line elf-4, Fig.. 2. Fig. 5 is e front elevation of the power disk. Figli is e iront elevation of the Valve body with hand and power disks removed.

` Rei'eiiing more particularly to the drew- -.ings, 11 designates.x a reversing cylinder adapted to contain e piston mounted intermediate the ends 'of e. piston rod 12. 011e end ot this piston rod is connected to the Valve geen, While the opposite end is oonnsoted' loy- :i link 13 with the power .lever lll This afi'angement will he' clearly nndetstood by Vrei'eifence to the former patent.

:fn 'this invention, one of the cylinder heads 15 is yprovided with a 'yoke 16 sufi sounding the'piston i'od and carrying et its free extremity e smell locking cylinder 17 through which the piston rod passes die metiieally. The .lockingr 'cylinderl contaies smell piston 18, of trunk form, which is slotted at 19 for the passage of the piston rod 12 end e toothed pawl 20 is fitted Within it. seid pewl being ,adopted to mesh With teeth 21 formed for e suitable dise tence on the' piston rod. The piston 18 is norme-ily held in depressed position with the peivl 2G engaging' the 'piston rodl "by a.

spring' 22., compressed between the top of the mm1 and the een 23 vof the cylinder. A

smell piston rod 24 is revolubly connected to the 'piston 18 and posses out through the oep 23.4 This rod is provided with a dianieti'icelly disposed key 25 sliding in e slot 28 in the can, so that on occasionthe piston may oe raised hy 'means of this rod to disengoge the pewl from the shaft, and locked .in such iaised position by partly turning the piston rod, so that the key 25 is outo'f register with the slots 26 sind nests against the outei1 surface of the Fluid pres sure is admitted under the piston 18 through e. pipe v27 leading from the control valve whenever the valve. is operated. The motive iiuid isodmitted fiest through this pipe 27 and mises' the small piston 18 to clisengege the pewl fiom the piston rod 12.

The motive fluid holds the iiiston elevated against the action of the spring 22 until they desired adjustment of the valve gear is attained, and the parts of the control valve re-adjust themselves, whereupon the .pres-fy .supply pipe 27. lVhen the motive Huid is admitted from the eontrolvalve, the leakage through this port is not sufficient to prevent the piston being raised and held up, but when the supply of rfluid is cut ofi' at the control valve, the leakage through this port the iniuence of the'spring.

.very soon allows the p iston to drop under The control valve mechanism is in most particulars substantially similar to that de? scribed in our Patent No.71,082,733 aforef said, and is inclosed in a casing comprising a body 29 and cover 30. The control valve machanism comprises a manually operated disk 31 and a power. operated disk 32% the manual disk having ports 33 formedthere through, and adapted to register with ports 34 formed in the power disk and positioned over chambers 35. formed in the body. The

manual disk also has an exhaustchamber 36 cored out on its under-face and adapted to connect one of the power disk ports 34 with the exhaust outlet. ln the present in- LventiOn, these ports'are positioned slightly closer together than in the former invention, so as to leave a portion of 'each disk free. The power disk is provided with a long eircularly curved port 37 extending there# bridge.

through and formed of a length at least as great as the maximum travel of the disks, so that this port -will always be in communication with 'the outlet passage 38 formed in the body and connected to the pipe 27. The manual disk normally covers the power disk port 37, but the lap at each end of the port is preferably much less than 'the lap at'the ports-34, asclearly shown in Fig. 3, Aso that the port 37 will be uncovered slightly before the ports 34. The manual disk is provided with a pair of ports 39 adapted to uncover the port 37. These ports may be entirely separate or separated .merely by a ltwill be noted in Fig. 6 that vif only. the chambers 35 were provided, the power disk would have much less bearing surface on one side of the center than on the other, so that if the disk were kept tightly enough seated to prevent leakage, there would be great friction. To overcome Xthis, as much as possible of the body' surface is cut away, thus yforming a chamber 40 provided where necessary for the support of massed the power 4Qdisk with bridges 41. This chamber is constantly supplied through aport 42 formed in the power d1sk,`and constantly in register with the manual disk ports 39. The fluid pressure under the disk at thispoint has the effect of balancing theV same and enables the seating of the disk to be kept iluid tight with a minimum of friction. When the manual disk is rotated, the ports 39 thereof register with the port. 37 of the power disk, and motive iiuid flows through the ports and through the passage 38 and pipe27, to raise the piston 18 and lift the pawl 20 free of the piston rod 12. All this' occurs before any fluid flows through the ports 34 or before there is sufficient ow to cause a reciprocation ofthe piston, owing to the difference in lap at the ports 34 and 37. As the manualdisk which rotates one port 34 is brought into register with a port 33, and the other port 34 with the exhaust chamber 36, so that motive Huid is admitted at one end of the cylinder 11 and 1 permitted to escape at the other end, thus causing` reciprocation of the piston rod, which adjusts the valve gear ofthe engine and at the same time operates through the link 13 and lever 14 to. shift the power disk around in the same direction as the manual disk was moved, until the various ports assume their original positions, as shown in Fig. 3, and as described in detail in the former patent.

ln most locomotives, the valve gear is connected to the reverse lever between the handle and fulcrum thereof, the handle belng drawn back in reversing the engine and pushed forward when going ahead. In our former patent, it will be noted that the power lever and manual levers corresponding to the ordinary reverse lever are arranged with the connections to the reverse gear on the opposite side of the fulcrum from thehandle, so that unless the valve motion eccentrics were arranged exactly op posite to common practice the lever would be pushed forward to reverse the engine. This arrangement would cause confusion, and ytherefore in the present invention the manual lever 43 has been fulcrume'd at its lower end at 44, and provided with a toothed quadrant 45 meshing with asecond toothed quadrant'46 secured on the stem`l47 of the' smanual disk by means of a pin 48,

with which an engine 'has been formerly equipped, in the event of the installation of this apparatus.

v'lhe method of eonnecting'lthe manual V voke connected to one end slotted piston,

i malafede ist and haver disclosed in our former patentlias been found to be too productive or slack motion, and therefore has been replaoe'dby a slightly dierent structure, as shown in Figs. 3 and fl. The spindle Li7 is provided With a pair of arms projecting radi-'ily and engaging 'between lugs formed in pairs diametrically opposite on the rminual4 disk, as shown in Fig. 3. This spindle vis recessed at its inner end' at 51 to receive a lug '52,' centrally disposed on the manual disk, anda spring 53 held in compression between the bottom ofthe recess and the lug. rlhis spring operates not only to hold thennuuual` disk down on the 'power disk, but also to hold the 'inner endA of the spindle' closely against the cover 30', Where a Washer 54 is provided to make a iluid tight joint. y

Having thus described our invention, what vve claim ier- 1. ln a device of the character described, the combination with a lluidpressure operated reversing gear including a reciprocating rod or automatically operating 'rod locking means, luid pressure operated means arranged to release said locking means prior to the operation of the reversing gear, and manually operated means for setting said locking mechanism permanently in unlocked position. y,

ln a device of the character described, the combination of a reversing cylinder; a 5 thereof; a piston rod titted to be reciprocated in the reversing cylinder and guided at'l the outer end thereof, said rod having a' plurality of transversely extending teeth; a locking cylinder extending across the yoke, adjacent to its outer end, and transversely slotted for the passage of the piston rod; a correspondingly of trunk form, fitting said locking cylinder; a pavvl fixed in the trunk oi' said piston and having teeth adapted, to engage those of vthe piston rod of the reversing cylinder; a cap closing one end'of the locking cylinder; a spring held in compression between saidcap and the pawl; a iluid pressure inlet leading into the locking cylinder opposite the closed end of .its piston; and a corres}: ond ingly located fluid A pressure outlet, of substantially smaller transverse area than the inlet.

3. ln a device oi the character described,

' the combination of a reversing cylinder; la

yoke connected to one end thereof; a piston rod fitted to be reciprocated in the reversing cylinder and guided at the outer end thereof, said rod having a plurality oi' transversely1 extending teeth; ing across the yoke, adjacent to its outer end. wild transversely slotted for the passage of 'he piston rod; a correspondingly slotted fir-ton, of trunk form, fitting said locking jvlindeig a paivl fixed in the trunk of said closes the vend of ing full travel Avalve diskin the a locking cylinder extend-- piston and having teeth adapted to engage thoseof the piston rod of the reversing cylinder; a manually revoluble rod connected through which said rod passes and which the locking cylinder adjacent to the paul; a key projecting diametrically from the rod into the cap slots; and means for manually turning the rod to bring said key out of' register with said slots and to engage it with the cap 'for the purpose of holding the pawl out of engagement with the piston rod teeth.

. Il. ln a device of the character described, the combination of a reversing cylinder; a piston rod adapted to be reciprocated by a piston therein; a piston rod locking mechanism; a valve; ports in said valve adapted to simultaneously admit and exhaust motivev fluid to and from opposite ends of the rcversing cylinder; and a port in said valve,

adapted to admit motive fluid to the locking mechanism prior to the admission or release of motive iluid through either oir the first mentioned ports, and to maintain the ilovv of motive fluid to the locking mechanism until admission and release, through the lirst mentioned ports, have ceased.

A5. ln a device of the vcharacter described, the combination of a reversing cylinder; a piston rod adapted to be reciprocated by a piston therein; a piston rod locking mechanism; a valve device comprising a valve seat having a through port; a valve disk connected for partial revolution by the piston rod, an arcuate port in said disk adapted to maintain opening of the valve seat port durof the disk, a second valve disk, ports therein which are normally out of register with those oiz the first mentioned 10i disk, a manually operable lever adapted to rotate said second mentioned disk so as to cause the 'port of the first mentioned disk to be uncovered by one `of the ports of the second mentioned kliek; and means for mitting motive Huid above said second mentioned disk.

' 6. in a device of the character described, the combination of a reversing cylinder; a piston rod adapted to be reciprocated by piston therein; a piston rod locking mechanism; a valve device comprising a chambered body having 'a valve seat and a through port therein; a valve disk in the valve body connected for partial rotation b the piston rod, ports in said diskadapted to register during full disk travel With the valve body chambers and port, a second valve body having through ports adapted to register with the ports of the lirst mentioned disk, there being less lap between one of the and of the second than between the remainin ports thereof, whereby one port of the ad: 1 l? a iii first disk will be uncovered the re- 139 infin/ing Ports and covered thereafter; pipeV este ilislnng communication between the lea'stflepped hport and the rod locking mechaynisin; and pipes connecting the remaining ports with opposite ends of the reversing cylinder. M

7. .In a ldevice of the character described, the combination of e reversing cylinder; a

piston rod adapted to be reciprocated by a mally out register with the raldial ports ofy the first disk,',end two Iiort's normally out of register With'the arcuate port thereof, the lap at the ends of the arcuate port being less than the la et the ends of the radial ports;

'a pipe este lishing communication between the bod :port and the locking mechanism; a connectlon lfor rotating the first valve disk by thepiston rod; e manually. opera-ble lever journsiledl in the valve body; e toothed sector carried by seid lever; and a similar sector carried by the second valve disk and enga-g" ing with the rst valve disk. In witness whereof, we have hereuntoset our hands in the presence of two Witnesses. WLLIAM ,FX J. CASEY, GUSTAVE CAVIN. "Witnesses:

W. MBURTON', F. A. HARRIGAN.

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