US1616690A - Hand brake for railway cars - Google Patents

Description

Feb. s,.. 19z7. 1,616,690

S` B. HASELTINE HAND BRAKE FOR RAILWAY- CARS Filed April 2l, 1924 Ying.

Patented Feb. 8, 19127.

1 unipr En sprain inietta- S PATENT POFFCa f s'rno B. HASELTINE, or CHICAGO, ILLINOIS, AssIeNoRQBr ivin'snnnssieimnivrspro 1 W. H. Minna, INC., A CORPORATION onDnLAwARr-il HAND BRAKE non RAILWAY cans.

Application mea iipriizi, `1924. seriai No.'l 707,824.

- This invention relates. to improvements in hand brakes for railway cars;

p In the operation of hand vertical staff type for is sometimes experienced brakes of the railway cars, difficulty due to the binding ofthe staff Vwhen released,'this binding being frequently caused by wall of the car or by bending ofthe stad itself, with the Vresult brake is releasedl in the that even though the usual manner, the

chain will not become fully slack,l thereby permitting the brake shoes to remain in contact with the wheels, causing excessive wear and increasing the tractive effort required. One object of my invention is to provide an arrangement especially brakes of railway cars, wherein provision isV adapted for hand made for positively insuring the fulll and free release of the hand brake mechanism, to

the end that the rotation be thereby held and the vfree to disengage of the staff may not brake shoes maybe from the wheels to Vmini-l mize wear therebetween and reducethe trac'- tive effort required of the locomotive. Other objects and advantages of the invention will more clearly appear from the ,description and claims view taken through hereinafter following apart of this a vertical sectional theV end wall ofthe cai' and showing myimprovements in connec-V tion therewith. Figure 2 is a horizontal sectional view ofthe structure illustrated in Figure 1 and corresponding to the section line 2-2 thereof;

Figure3 is a horizontal sectional view corresponding to the view shown in Figure 2 and showing the dogand release handle in released position.

Figure 4 is al detail planl dog.

And view of the locking In said drawing, the end wall of the-.car

is indicated at 10 and aV bracket, designated generally by ence character A, lis secured thereto.

bracket is provided with eted'or otherwise rigidlysecured to the car* or bearing the refer- Said fa rear wall 11 rivhousing wall 10 by means'of rivets 17, said bracket also having a bottom web y ing horizontally and provided with a ]our or wall 12 etxendnal bearing 13, an intermediate web or partition 14C extending'horizontally above the web,l and vertical flanges 15 connected toward their front end by a rounded portion 16. A

cap or. cover plate 18 is a lso employed and is bulging of the Vend' the ratchet teethw22, said vvided with an elongated slot 32 through lower end of the ratchet wheel beingprolvided with a journal 23 adapted to rotate within the bearing 13 of the bracket.

' Oscillatably mounted onthe ratchet wheel B is a carrier or fulcrum memberdesignated generally by the reference character C. Pivotally inountedon the fulc'rum member is an Y operating handle or` lever 24, said lever being' pivotally connected to the carrier member by means of' a pivot bolt 24'. The handle 2txis provided` at the t'op end thereof `with a socket 25within which is slidably mounted a pawl 26 normally impelled outwardly by means of. a spring 27. In Figure A1, the operating handle is shown fin inoperative zposition yand when it is desired to rotate the ratchet wheel in a1step-byfstep movement to wind the Ybrake chain on the ,staff 19, the operating handle isl swung vertically tov a horizontal position land oscillated, in the usual'mannen rv-rr'itatably journalled in ay hole 30 provided in the web 14. v The forward end ofthe y dog is` providedwith a tooth 31 to coact with dog also Vbeing pro- 1 which a vertical Abolt 28', kcarried by the bracket, is positioned as shown in the drawing. The dog D is reduoedin vertical thickness by having a recess or under-cut portion 33 provided inthe under face thereof, the` end walls of said under-cut portion forming f.

vshoulders 34C and 35 at its ends, extendingin 'i a direction 'substantially radially to the-center ofthe pivot 'pin 29. A notch 36, is provided radially inwardly of A'the shoulder 35 so.v

ics

yVhen the dog is mounted in thepo'sition shown, its tooth 31 will coact with the ratchet teeth '22, and afspring k37 is interposed between the brachetand the toothed end ot the 'dog so as to yieldably ltorce the tooth 3l to coact with the ratchet teeth and permit a stepbystep movement thereof in a winding direction. but prevent accidental reverse rotation thereof.

A release handleor lever 3S is pivotallyY mounted at itsinner end on the vertical bolt 28, Vsaid handle Ybeing arranged below the dog D and provided with an'upwardly eX- tendiiig projection or pin 39 at its inner end Vadjacent its pivotal axis, this pin serving as a cam and working along'the cam surfaces or shoulders 35 and 36 ot the dog D ina ianner to be hereinafter described. The release handle is bent or offset intermediate its ends and is provided at said bend with an upstaiiding liange 40, adapted to' abut against the` ulcrun'i member' or carrier C when the handle is pulled to its position oi" releaseas shown in Figure 8. v

The operation of the handA brak-e is as tollows, assuming that thev parts are in their normal operative position as shown in Figure 2, .withthe dog tooth v3l coacting with the ratchet teeth 22 and permitting a step- ;by-step winding movement of the' ratchet wheel. In' this position, the pin 39 will 'be closely adjacent'or abut against the shoulder 35 seas ,to enable theY release-handle to `re- .tract the dog from its engagement with the ratchet wheel while permittingthe slight pivoting movement oi the dog necessary tor the step-by-step mov-ement of the ratchet wheel. When it is desired to release the dog' `from its holding engagement with the ratchet wheel, the release handle 38 is pulled horizontally to the position shown in Figure 3, `when the Yflange 4i() is in a position'to be engagedv by the carrier oil itulcruin member as shown. As, the 'i'.eleasehanrille swung to the latter positiomit's pin 39 slides along the shoulder 35, acting as a cani toyswingtho vdog, in unison therewith, about its pivot 29,

th'epin 39 seating in the notch 36 at the end of swinging movement of the handle, in

`which position the `tooth 31 is entirely dis-y engaged rom theratchet teeth, and the releasing handle. while in released position,

will hold the dogin saidreleased or inop-V erative position against the pressure of the spring 37. Y

Alfter the handle has been pulled toits position of release it will remain so, withthe pin 3,9 locked in the notch 36. While in this position the force of the spring 37 acts to tend to oscillate the'dog about its pivot 29, this in turn causing the outer side or Vwall of the notch 36 to exertV its thrustV against the. pin 39 along aline well within vthe brakes, will nevertheless be permitted to continue its rotation in an unwinding di# rection when the car gets inmotion and Jarring of the brake chain occurs, to permit the I brake shoes to becomeJ fully Vdisengaged from the wheels and the brake chain'to be fully slack. f

lhen the bralreis later applied to wind the chain, the brakeman elevates the handle 24 and as he oscillatesthe same, the'carrier or fulci'um` member C, by engagement with flange 40, will actuate the releaserhandle 38 to cause the pin 39 to move outof the'notch '36, whereupon the spring 37 will force the dog into its normal operative position to hold the release handle in i-ts normal positionar j v- I have herein shown and described what I now consider the preferred. manner of carrying out my invention but( the same is merely illustrative and I contemplate all changes and modifications that come within the scope or" the claims appended hereto. y I claim:

l.V ln a hand brake for railway cars, the combination with a rotatable ratchet Wheel. adapted to wind a brake chain; .of means for rotating said ratchet Vwheel in a chain-wind ing direction; a locking dog engageable with said ratchet wheel to prevent reverserotavtion thereof; `a release handle engaging said dog to hold the latter retracted :trom the ratchet wheel kwhen sai'dhaiidle is moved to released position; and means whereby said handle is returned to normal position by ao- 'tuation oit said lirst mentioned means.

2. In a hand brake, the combination with a brake statt having a ratchet wheel rotat able therewith; of means `for iotatingsaid stati and ratchet wheel in a stepeby-step movement ina winding direction; a springinfiuenced locking dog engageable with said vratchet Wheel to prevent reverse rotation thereof; and a release handle having a cam kportion engaging said dog to actuate the mit said dog to re-engage -with said ratchet 'wheeh ln a hand brake for railway cars, the

Vcombination with a Erotatable ratchet wheel;

of means for rotating said ratchet wheel in a chain winding direction; a spring influenced pivotedlocking dog engageable with saidratchet wheel to Y prevent reverse "rota lili y tion thereof; and a release lever pivoted about an axis V(3E-set from the pivotal axis of said dog and havingmeans cooperating with vthe latter to effect movement of the same about its axis Vin the saine direction as the direction of movement of said release lever about its axis, said means being constructed to provide anV interlocking'connection between said dog and said lever to maintain said dog in retracted position. f

hInahaiid brake for railway cars;V the i vcombination with a rotatable brake stati' having a ratchet wheel thereon; ol meansl for v rotating said ratchet wheel in a chain windu' ing direction; a springinfluenced locking 'dog engageable with said ratchet wheelto Vprevent reverse rotation thereof; and a release handle having a'cainportion engaging saiddog to hold the latter retracted from the ratchet wheel when the handle is released,

said handle being adapted to lie in the pathf of movement of said carrier when the A,tor-

mer is in releasedV position so that when the carrier is next operated, the latter will engage the handle and move the same tov non mal position to permit thel dog to reengage with the ratchet wheel.VV 1

i 5. In a hand brake, the combination with' a rotatable ratchet wheel; .of means for roltating said ratchet wheel in a chain-Winding direction; a spring-influenced pivoted locking dog engage-able with said ratchet wheel to prevent having a cam surface thereon with a detent portion; and a release handle pivoted aboutv .an axis oit-set from the pivotal axisA of said dog and having a projection coacti'ng with the cam surface of said dog and seatinghehind said detent portion when the release handle is moved to released position; to

-thereby hold the dog retracted' from the ratchetwheel. A

6. In a hand brake for railway cars, the

combinationwitha rotatable ratchet wheel;

reverse rotationthereof;l said dogV ot an operating handle Jfor rotating said ratchet wheel in al chainwinding direction; a fulcrurn memberV carrying said operating handle; a locking dog engageablewith said ratchet wheel to prevent reverse rotation thereof; and a `pivoted release handle, havingV its pivotal axis oiset fromv the pivotal axis of said dog and provided with a portion engageable withl the dog-to actuate the lsame tion, said. `ulcrum member being arranged to co-aetfwith the release handle to vreturn the same to normalvposition operating move- Y ment of said fulcrum member.

7. In a hand brake for railway cars, the combination with a rotatable'ratchet wheel;

when the handleis moved to released posi sov of` an operating lever for loperating said-Y' ratchet wheel in a step-by-step movement in latter to hold the saine retracted :trom the ratchet wheel, said handle and dog being provided with cooperating camming parts .y

whereby vwhen said handle vis movedk toI release position, said cainming parts will exerta camming action to actuate said locking dog about-its pivot and `hold the latter 'in re-A leasedposition, against the spring-pressure,

said handle beingjadapted to abut said carrier when the formerV is in released position;

so thatiwlien the carrierVV is -next oscillated,

se j

the handle willv be actuated thereby to move Y the same and'locking dog to'- their normal position.-V l l In witness that I,k claim the -foregoingI have hereunto subscribed my name this 14th day of'April, 1924. v

l l STACY B. I-IASELTINE.

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