US1252330A - Automatic train-stop. - Google Patents

Description

Patented Jan. 1918.

A. Y. DODGE.

AUTONlAIC TRAIN STOP.

APPUcmoN min MN. 28. |914.

WIr/VESSES: fawwb Alma/m Iat UNITED STATES 'PATENT oiEIoE.`

ADIEL YEAHAN DODGE, OF CHICAGO, ILLINOIS.

AUTOMATIC TRAIN-STOP.

Application filed Januar'y 28, 1914. Serial 110,815,009;

To all 'whom t may concern:

Be it known that I, ADIEL YEAMAN DODGE, a citizen of the United States, residn at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Automatic Train-Stops, of which the following is a "'ull, clear, concise, and exact description, reference being` had to the aecompanylng drawing, forming a part of this specifica' tion. l

My invention relates to improvements in automatic train stops.

Among the principal objects of my 11ivention are: A

First: To provide an automatic tram stop capable of causing the brakes to be applied gradually7 `andsuch that it may be used also in connection With throttle closinf apparatus. Vcecond: To provide such a stop that 1s self closing after the brakes have been set, independently of the engineer.

Third: To provide such a stop adapted for use with practically any cab signaling.

system, but particularly adapted to the system set forth in my c0-pend1ng application Serial. No. 815,010 iledV'Jan. 28, 1914.

Fourth; To provide a stop such that it allows the train line-air to escape at a desired rate until a desired'pressure is reached and then retains it, and such that during the time such air is escaping the main reservoir air is conlined.

These and other-objects will be apparent from the following description and the accompanying drawing, taken in connection with the appended claims. y

The drawing is a sectional elevation of an automatic stop constructed in accordance with my invention.

Like reference characters refer to like parte throughout thefollowing description and the drawing. H

Referring to the drawing, the stop con siste of a double valve comprising two sliding members working in opposition to cach other. -llach is impclled by the air it conlines. l' have shown these. valves 1n the AForm of pistons 13, lli: housed in cylinders 5, 12 but they may be of sorhe other shape. The cylinder 5 and the easing 2C' are in one piece. )heap 1l` is provided with means to hold the eylindcr .l2 directly opposite 5`cylind'er Pistons 13, 1,4 are connected Speeication o! Letten Patent.

'show the half which remains.

vline 0f travel of the valve.

Patented Jan. 1. `191e.l

together by a connecting rod 6 and move as one. W1th1n the casin 10 are two' electro-magnets' which are yo ed together' and held in place -by any suitable means such as bolts and nuts. Magnets 15 hold armature 8 againsttheir cores when energized. Ar-

-mature 8 isrigidly connected tothe lower part of a speclalcam 7 which is also lo- -4 cated in casing 10 and pivoted in the same `at 9. This special cam is a combined lever and cam, nndis shaped to straddle the connecting rod 6 and is slotted on both sides to operate on pivot 16 in connecting rod 6. The lower portion of one side of the cam is shown cut and broken away, in order to The mechanical advantage of this cam is derived from two sources; first, from the lever ratio from thepoint 9 to the point 16 and one illustrated in my copendmg applica tion, Serial No. 768,058 filed-May 16, 1913. The heads of the cylinders are providedv with threaded` ports 27, 28 which may be connected directly with the desired pipe or with some intermediate member such as I have shown. Port 2.7 in the Ahead of cylinder 5 is connected with the train line through an adjustable needle valve 18.A The port in the head of cylinder 12 ia connected to'a safety valve 21 ora reductionvalve as desired or n. combination 'of both connectie tlul cylinder 4with the main reservoir." Cy

'indcr 12 is also provided with a port 20 leading to the engineers valve and train line located to he Vopened and closed b l the piston' 14. Cylinder 5 Vis provided witliI ditiona-l ports 22 which are exhaust ports. In order that the cylinder` 45 5 should be inaccessible through theexhaustpcrts they, arcmadc in the forni of by-Passes -whic conduct the'air'tothe-casing 10 and then loc iop

into the atmospherethrough ports23. If"

it is desired to utilize the exhaust air to close the throttle, pertsfeeare omittdmd 'a port 19 is prov1ded to'exhau'st. the vair' into throttle closing' apparatus snch,,f0r example, as is shown in my co? el'idingfap plication, Serial'No. 768,058, lii ed 16,

In operation air #fromthe train line. is.

` admitted to cylinder through port 27 and fiends onthe ratio of needle valve 18 which is open'accordng to its adjustment. The constant pressure on iston 13 tends to force it outwardly. Air rom the main 'reservoir enters safety valve 21 at 'port 25 and is admitted into cylinder 12 through port 28. This constant ressure piston 14 in opposition to tends .to force resid-tant of these two. forces piston 13, The

13. The 'magnitudexof this resultant detlyo pistons13 and 14 Vand the ratio ot' the tWO air pressures. Whihneton them., YIf u I' reduction `valve is used. in place of the safety ing piston 14 inward'.

the atmos During' this-t operation the cam strikes the 45 valve 21'this resultant can be adjusted adjusting the reduction valve to control the air pressure admitted to cylinder 12. Whereas resultant force can only be regulated by the ratio of the piston. area.

7- bears against the pivot 16, the cam being in place by the engagement of the arthe' electromognets 15.

main reservoir enters ':ylinder 12V and is conducted to the engineersva'lve through lport 20. When .magnet ll5 becomes deenergized armature 8 and cam 7 are released and piston 13 moves outward fore As the head of piston-13 uncovers the ports 22 the air lbenj-ns to escape. from the train. valve 18, c linder 5ports 22 and 23,- into filierethereby stopping the train.

ratchet lever'of the'counting device 17 and causes lit tol stop. l?iston 14 now .covers port 2.0 shutting' "olf Vair 'between the reservoir and the rest of theair brake equipment.

, Wil-mth@ nir in" the one 1in@J his reachedv the predetermined pressure the, foregofpiston 14 over-balances the force of piston13 causing itito recede until com- .'munication; is closedxbetween train .pipe 2 4 '55` v "I tuantfequilibriunr y 2t). isjcovered .prior to the uncovering ofportsf22in and ports 22. Theitwo pistons reaeh, .a.fl ue attlns point. The port order 'to prevent air from/ pass- 'lng-from' the' mam reservoir into Itho. .train "Ehilth P'SOIIBZnre inl operation. In con. `piston Y13 to return .v to `its 'tiollfthe engineer'mustfprther pmssurein'the train. line by hiel mkevnve, when-pistn i4- ;v'wglli-for piston 13 back and will rock cam the diameter of the without the reduction vvztlve the Y "To hold the pisf. .ton 13 in normal confining position the com linethrough needle.

register an operation Vof the tolnaticnlly releasable, so, arranged that when released it will. be

i mais@ 7. so *flm'l'r'ofwill como in contact with- `en nego! netsa're energized t ture B and' cam'7 w again retain piston 13 in its normal 'tion f It will benotedthat'the cam 7` is continuously in -contact with the pivot 16, thus facilitating th'e automatic return of the cam to retaining position. It will be further f seen that I have provided a stop simple in its nature, for inasmuchv as the pistons are connected with one. another and the 'cafm' and armature are connected,y there are but two moving` parts.

It 'will be. apparent that numerous' changes may be made inthe form, arrangement and construction of the parts Without departing from the spirit ofthe invention ets 15. .If the magafl Will hold the armaor exceeding the scope of the appended I-Iavingthus described my invention.

what I claim as new and desire to :secure by Letters Potent, is: v

l. An automatic tra-in `top comprising-av member arranged to confine the train. vline n i r under-normal conditions, molly retaining said member slxclnoniinl ing position.. said retaining means being :mtonmtirnlly rolensnble, said member being so :wronged that when released it will be impvl'lod in one v lil'eetion by the force Fit' the means for norv train lino air und back to normal position i b v the 'torrie ot' the main reservoir nir. und moons for permitting said 'train line :iir to escupe' when said member is out of said nor# nml position, thereby to` stop the trnin.-

2..- n :infomatie train stop comprising a mmnber arranged to' confinelthe train iin air under normal'conditions, means 'tornen molly retaining said member in such contining' position, said retaining means being" :uni

toniaticzilly .releasnblm arranged that when impelled in one direction' train line air. and' back to normal position by the force of the main vreeervoir nir. :nul means for 'escape gra: rally when' said member is Aour otsuid Anormal train. l

. 3. AAn `automatic tru-in stop comprising a said member being releasedzit. will be position, thereby to stop the by the force o'tthe permitting said train lino air -to l member 'arranged to confine'. the .train lino -i nir under normal conditions, .means for non molly retaining snid member in such coolining posi tion, saidmtaining means being :iu-

sn-id member boing lmpelled in one direction by the force ofthe train line air and buck-to norm-ul position by 1 moin Arservoir nir, Mid

Bil

'tbe train .line

tomatically toeai v ing.` position; after the' -enig opened. I"

memberarranged, under normal conditlons, toooniinethe tramlineamm r'ornorf pelled bylrtli'e foroeof the main reservoir. air

to return said first `named lnemberto normal position, v f ,y 1

5. An automatiogtrain 'stop comprising''al member' arranged, under normal conditions, to. confino the train lineair, means for normally retaining said vmember in snob ,com filling; position, said retaining means being automaticall rales-sable, means' for allowing said tram line air to escape thereby to stop llietl'ain when said member isreicaSed, and a member associated YW-il'Jb said first nan'reclmembern and arranged-ton-eoniine .the main reservoir air wl'riie said train line air is being permitted to escape as aforesaid,

3. An automatic train stop oomprisingn member arranged, under normal conditions, to confine tbe train line air,"means for ndrmally retaining said member in such confining position, said retaining means-being automatically releasable, an adjustable port :for allowing said train iine air to escape thereby to stoptbe train when said member is released, and a member associated. with said first named member and. arranged to confine the main reservoir air while said train line air is beingV permitted to escape as aforesaid. 1

7. An automatic train stop comprising a double, valive, onrortion of' which is arranged to confine eftran line air under l normali conditi ineens for normally re :taining Vsaid valve iin snob position, said means being antlloniaticaily releasable, and

means for causing said valve to move when released into snolrgposition, that said train line iir is permitted, to escape, Lthe other 'por ,in *of'sai'ly'alse being arranged to con fino the main reservoir airv wheigaid valve is in saiiftlrtst named position'.

S. .Air automatic train stop comprising 'ociproeating member arranged, under normai conditions, toooniinoibe train line air'Y when in one position and to Aconfine tbe resl eawwoirair when in anothenposition, means for"nornmily retaining said member in said' n lt-nain rl position, means forv releasing s, ,gggyi' retaining member, thereby; to fallow said, 'member to more into a position to permitf the escape of said, train line air, and means "for returning saidmember to normal lposi- 4. aiitomatio train stopweompris'ii'ig a ,mined extent.

ald ,retaining meansbeing continus yin oontactwith 'snidmellnben conditions-toponimo the tram* line air ne position and to oonnef'tbe r other noemen', means: for normally retammg said;y member :in vsaid iii-st named position, electromagnetic means rfor rel'asing said retainingmember, thereby 75 torallo'w said member tofr'nove intoa osition to permitthe r ,sn1,'i})rsfajfsairltrain4 ine air, and moansy fori retlirning said member to normal position, saidgre,taining 1 means being coi'tinnoiisly' in v(mntaot with vsaid member. 80

,I loilAn automaticvtrain stop compris-ingo reoipnoeatmgmember arranged,vunder normal conditions, to confine 4the. train l.line air Wbe'n'fin oelpositionf aridto confine thereaervoir air. whenin,4anotlierf`-pos'ition, acam ar# 85 rangedto normally retain said Vmeirlber `in said. first named pbsitioii, means for releas ing saidv cam, thereby tot allow said member to move into a position to permitthe escape ofsaid train4 line air, and means forl return'- 90 ing` 'said membert'o normal position, said @am being. continnouslyiil ,Contact with rsaid fmernbern lil. .An atomatic train stop comprising a reciprocating memberV arranged, under nornia-l conditions, to coninethetrain'line air 4when in one position and ,to confine the reservoir air when-in another' position, a cam arranged. to normally retain said member in said first named positioin, electromagnetic means for releasing said Miam, thereb .low saidimember tojmove into a posltion to permit the esoapef'of saidftrain line air,and means for returning said member to normal position, said cam being continuously in contact with said member. lQFThe combination with an automatic train stop for railroad signaling systems, arf ranged to apply the brakesgradually and to conne thercservoir vair during such operation, of means Yfor releasing the brakes by first openingtbeengincers vvalve to furo ther reduoetheairipressureto a predeter' An automatic train stop comprising a11 5 pressnrrchalnben in communication with theI train line`, ,a pressure-actuated member actu ated' by the' pressure in said chamber, meansj Wlierebyactuationof said member` releases.

theair in' said tram pipe, a'second ressur'f'w'lZO v chamber 1n commnnl-eation'witht e reser-'f Y,

Voir, a second presso12e-actuatedinembel:l o any y tuated by the present-erin :said second chameseoond pressurenctuatc'd member confines 125` tbe air inthetrain pipe. i o

14. lAn auton'latio train stop oomprisinga pressure-chamber in connnunicationwith the train line, @pressure-actuatedmember -actn- V ber, and means `vvhereby the actuation 4of Said ated'bytbe pressure in said cha ber, means 19.0V 4 i 'fines the air inA whereby actu the air in said chamber in voir, a secon tuated by th' ber, and n said second p vand'returns said first` press tuatedmember.'

15. An autom ti pressure-chambe train line, a 'pre' connu'uncationwith the resactuutd l'membenactuf ated by bamberg: means whereby actuation of: sarflmen'lber'releases the air iu said'trainfpipe,."\second pressure- 'chamber in -conununication ywith the reser- .train stop (mila)'rising a v voir, a second' pressure-:actuated member actuuted by thev )ressurejin said Second-chamber, means W erebyxtheactuation*of said second pressure-actuated member confines the air in the tramkpipe andrreturns said Y train line, a

first pressure-actuatedf member, and auto'- matically-controlled vmeans for normally holding said pressureactuated 1f f mbersin position to conmpinew'tlre train' pi Y-air.

16. An automatic train comprising a "e cylinderincommunication with4 the piston insaid cylinder actuated lb y they-pressure therein, means whereby acscribed my name in "tuation of said piston releases the air in said 'trein pipe, 1 communicatlon'with the reservoir, el second a. second pressure cylinder in piston actuated by the'pressure in saidrsecond'cylind'e'r, andmeans whereby the actuation of said second piston confines the'. air in the trainpipe. 1'

17. An automatic train stop comprising a pressure-chamber in communication with the train line, a pressurenctuated member' ac tuated by the pressure in said chamber a second pressure chamber in communication With the reservoir, a ated member actuated by the pressure in' said second chamber,A and means whereby actuation of said `first pressure-actuated member releases the air in said train pipe, and Whereby actuation of said second.' pressure-actuated member confines the air Vin the train pipe and returns said' first pressure-actuated member.

In Witness whereof, I have hereunto sub- Athe presence of two Witnesses.

`H. `MoNRoE HMASON, E. R: KING.

second pressure-actu-

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