US1877354A - Hand brake - Google Patents

Description

W. H. MINER Sept. 13, 1932.

HAND BRAKE:v

Filed Jan. 6. 1950 wrLLIAivi iiia'iimiaon cirez, 'NnwYoriig AssIGNoR 'ro van,

" V jrrlmnorsh Conroe-'ArronOFDELAWARE Yio Patented Sept. 13, 1932 v Minna, 1NC.,0F1CHICAGO,

i i HANnBnAIrE f Appucauonfmed Januarye, i930. serial No. 418,773.

fThis invention relates to improvementsinf handfbrakes. g y I Y, One object ofthe invention isfto` provide a simple iand efficient hand brake .mechanism for railway cars, of the rotary chainzwinding drum typeof rugged design, having relative ly rapid talreup attheinitiation'vof the ,winding operation to take upthe slack in theV brake mecha-nisnr followed Vbya powermultiplying action with. corresponding slower windingofV the chain to tighten thelorakes.VA y

A' further objectof the invention is toprol 1. videa brake mechanismofthecharacter de# scribed in the. preceding paragraph, especiallj E ly designed to be V Ipnounted on theend vwall of aY carand operatediby a rotary hand wheel, wherein the chain is gripped betweenr two-,ro-4 tary members bywhich alpull is exerted on the ,chain to,V successively take updthe" slack andi'tigh'ten thebrakes withgreat force, A more specific objectof the invention'is to providea hand, bra-ke mechanism including a pair of rotary.members'between which the brake chainfis gripped and A :on `one of .which th'efchain isr'iwound;anddsdriven by the other inen'iber throughV the interposedchain, the last narned rotary member ,being operated by af hancLwheeland-each of saidY members being eccentrica-ily mounted y toilprovide` the quiek 4 talreup.action and final great power' action, slippage Iof saidimemberslon the chain beingl entirely overc me by intermeshing, with thelinlis.thereof y v, i v

Otheruobjects of the invention will more clearly appearl `from the .description and claimshereinafter following. y v l ,Y

In the` drawing, :forin'ng a part of this specification, lf'igure `lzis lalveitical,A sectional View through my improved Ybrake Y mechafnism, illustrating the same -as mounted on the end wall of a railway car. Figure 2 is a vertical, sectional view, substantially `at rightlangles to the view shown in Figureil, and correspending to the line 2 2 of said figure.:l Figgure` 8 is a horizontal, sectional view correspondingsubstantially tothe line .9j-SufFigureLj- In said drawing, 10 designates the vertical end 'wall ofV a railway car to `which my imi provedbbralre mechanis'niisattached. The,

operating-mechanism lofthe brakes lpreferably contained within a housing which is` securedvto the end ,wall of thecar sollgasgto y dispose/the winding Vmeans for .rotation i about a substantially horizontal axis?.` Y The 55 chain ofthebralre mechanism is indicated "f l1 andas will be understoodfis connectedy to l' i the brake shown, y i, A Y, y l f My improved brake `mechanism proper mechanism proper ofthe car, not

f( :omprises an eccentric winding drum A, an

eccentric drivingrmember B, ra .drive shaft C, a hand Wheel D, a ratchet member F and a locking dog G. n l il `z p As hereinbefore pointed out, all of kthe-operatingV parts the handbrake mechanism aremounted` within 'ya housing. As shownr most clearly Yin Figures 2 andB, the housing is of two part construction.comprising :a hack plate`12 anda cover memberl. rThecover 'p79 vmember 13 has a vertical frontwwwallf 14; haivQ-yk ing the lower end section l5 thereof outward; Y

ly oifset as shown,therebyprovidingagpoclrf et in4which the ratchetmember Fand/the locking dog G 4are accommodatedgf 'The coverl member 13 (isprovided with spaced vertil cal sidewall sectionsl--l 'connectedfatv d thetop by' a curved'wall portieri, as,clearly4` shown in Figure 1Q The cover'fmeifnlo'er13,V isprovided Iwith* three lsecuring lugs 17+-I Si? 17T-'717, One of ,theflugsl is locatedatthe Y. upper vend of the housing whiley the remaining two prpjectlaterally vfrom the lower end portions of the-sidewalls 16 of the` .coverV member. The cover member '13 is secured to the'back plate 12 `by securing elementsl extending throughthe lugs I7, the backl plate i and preferably yalsof through"` theV end wallyl() of the car to secure the housing to thelatter. The securing elements may-be of--` any well known form, and are herein shown aslrivets;

o Thewinding drum A is fixed toa relativel tively shortrsupporting shaft lzhaving` itsopposite ends rotatably mounted ,in Jchef-ront wall of the offset portion'lI of thecover 5.1:? member ofthe housing and in theback plate v l2, EASV shown, the inner end ofthe shaft; 18V

is provided Iwith an annular-harige' portion which is `seated within jan openingin the A100 back plate The baclcplate 12` is pro-` o l surface portions V121 y surface of the drum is provided with a plu#V ,'rality of depress-ions or recesses 272-22in.

.which alternate linksV of the brake Chain are yber B. As shown in Figure 1, the flange 33k vided with a boss 19 through which the shaftA Ydicated in Figure 2, and has an'inwardly' projecting hub portion'g120 bearing on the drum and an outwardly extending hub por-r l tion2() which bears-on the inner side of the vertical wall'of the pocket at the bottom 'end of the cover plate of the housing.

ing by means ofa cotter pin extending `through the end of the same, a washer being Vthe' brake chain is accommodated, the groove beingrdefined' by spaced annular-outstanding ribs along opposite side edges ofthe drum and an inner wall presenting a series of flat adapted to seat,f and projecting lugs 122 therebetween adapted to engagezwithin the vremaining links, thus providing'in-effect a chain engaging portion whichineshes with fthe links of thechain. yThe windingsurface of" the 'drumA A hasa substantially straight section 23at one side thereof anda curved section-24 at the oppositesidef the curved 'section being eccentric Vwith respect to 'thev axis A `of" rotation of thedrum.V As shown mosty cle-arly in Figure 1, lthe curved section 1 24'ofthe winding'surface of the drum A approachles'the axis of rotation of the drum most closelywhere it connects with `the right- ,hand side of the jstraightsurface Vportion 23, as indicated, at 25. vAt the left-hand side of y the drum A, as shown in Figure 1', the curved surface'section 24 is connected to the straight section r23 Aby Va relativelyV short portion 26 disposed atan angle to the straight section 23.' At the sameside, the drum'Ais provid-V ed with avpocket 27 which'the end link of the chain'll is disposed, a securing bolt 28' extending through the link and the walls of the pocket to anchor thechainto the drum.l The driving member B is of substantially7 the same design as the winding drum A and is preferably made in the form of a duplicate casting'- of the* same. The driving member or drum B has straight andfcurved gripping Ysurface portions on opposite sides i thereof corresponding tothe surfaces 23 and 24'of the drum A respectively and also indicated by 23 and 24. The gripping surfaces 23-and 24 merge at the upper end of saiddrum VB, as

shown in Figure 1, the merging portion being indicated by 25 and corresponding in every y respect to the portion 25' ofY the drum overbalancing the dog so as to urge the tooth As shown, lthe shaftl8 is held assembled with the housy The winding;

The drum B as shown is also provided a pocket 27 correspcmding to the pocket of the drum A, which receives the end link ofthe l chain. As will be evident, thetwo drumv members A and Bare interchangeable and onemay be substituted for the other.

The winding member o-r drum B is secured to the drive shaft C, which has the .hand wheel D fixed to the outer end thereof. The

shaft C has its'opp'ositeends .j ournaledv intheV back' plate 12 and-.a projecting boss 3,8 Yon the vvvertical wall 14 of the cover plate respective- .ly. v'The inner" end of the shaft C isvpro'- vided `with'an annular retaining flange 29 which is'accommo'dated in a recess provided f in theplatef'12'.' `'The plate 12 has anjinwardly f projecting bossA 30 which accommodates the inner endv of the shaft C and bears on the inner side of the member B,"thereby maintaining this member .centeredV between the front-andbackwal-ls of the housing .andin y is in engagement with the rib 32 thereby limiting the -unwinding movement of the memlbers A andB. vWhen the drum B is rotated l in a winding direction, that is in aclockwise direction, as viewed in F igure 1, the 'flange 33will `finally engage therib 31, thus -posi-l l theimeinber B tively limiting the rotation of in a winding direction. v

/ The members A and B are so mounted that the straight portion' y23 of 'the former lies in ahorizontalplane and the straight portionV 23 l ofthe member B extends vertically whenin in' the releasedl position and so spaced that the ,brake chainv 11 will pass therebetwee'm-'the links of which mesh with the" recesses 22-v-22 of they two gripping surfaces vof these mem-V bers. As will be evident,'rotation of the mem-V ber vBV will thus positively feed the chain 11. by meshing therewith and through thefchain'v winding` drumj'memeffect drvingrof the ber A.

vBackward rotation of the drum A; is pre- 'l vented by the locking dog Gr which is pivoted between its endson a pivot pin'34,fhavingits Y opposite ends mounted yin theoffset wall por-v lug 85 in alinementlwith the vertical outer wall of the housing. At thel inner end, the

vtionl of the cover member and a vprojecting Y Y' rection. At the opposite end, the dogtnrV is` provided with ay hand gripby which the same 'may be manipulated, the hand grip normally thereof into engagementwith the'` ratchet memberfF.V The operation ofmy; improved hand' brake mechanism is as lfollows: Thenormalposition of theparts when'the brakes -are released, is `tha-tshriwnfin Figure l. Inwindingthe bra-ke chain to apply the brakes, thehand wheel D is rotated in a clockwise direction, as viewedin Figure l, thus-effectingrotation of the driving member `Bin a similar direction. Throughl rotation of thememberf-B, A

thechain l1, which-isv gripped-betweenI the sameandthe periphery of the windingvdrum Y A, will be forcibly pulled in a directiony to I'. leffect tightening of the brakes. Inasmuch as the members -B-` and Afb'oth mesh=with`t-he chain ll, rotation of the member A .islposi tively effected` through the member'Bby the interposed chain. As the chain 11 'isl ang() chored to the member A,the latteracts asa chain winding drum'andthe chain Vis wound" thereon in theusual'manner.` At the .beginning of ythe chain wind-ing; operation, `as j shownv in -Fi-gurel, the chain is-iengaged by mesh with the brakechainll inallrelative positions of rotationofrsaid members.l .Durf ing the winding operation, the drum A is'hel'd against backward movement bythe'dog G, as hereinbefore pointed out. i j I Y i y Whenit is desired toA release the brakes,'the

o operatolydisengages "the .dog AG "from..the

ratchet member F, therebypermittingthe chain: to unwind. If it is desiredtozbackoff the chain at'the beginning of the .brake releas-v ing operation, the dog'Glis retracted while the hand wheelis securelyheld against rotation, after which the hand wheel D is rotated in a counter-clockwise direction, as `viewed in Figure l, thereby effecting rotationV in a A- similar direction of the member B and through engagement'of the chain by this member rotation of the drum A in a right-v hand or clockwise direction.

y From the preceding description taken in.

conection with the drawing, it will be evident cficient, rugged hand brake composed of a minimumnumber of parts which may be readily and cheaply manufactured. Great e: economy is effected by providing the two ("7 drum members of like design, inasmuch as the gripping surface portion ofthe member B, which'is disposed furthest from the axis of that I have provided an exceedingly simple,V

beth er the Same pattern; Y ,L

may rbe'forme'di froinf av 'single p Y Further, by 'provi'dingY` eccentric 'arfil Y rangement of winding andf` driving i member which Vmesh withlthebrakei chainfa construction is had ,wherebyeffectiva rapid takeup-ofV the sla'cklin thebrake chain-fatthe initiation'A of tlfiefwin'dingV1 operation! is? had,

ingrthe tightening of the I rake i shoes on' i'the wheelsvof the car during'ffinalapplication of p the brakes." l 4 lfollowed-by power 'multi lying action dur Ii :have herein shown.: y'describedi now consider- .the preferred `manneroii' carry-1 ing out lmy invention, butthe ,same isinerely illustrative land`I contemplatelall=changes appendedfheretopc and modifications that comelwlithinfthe scope 'i lofthe claims I'Clim': '4, u L. 1. In a hand brake, the lcombination@with a chain; of a pairof rotary membersqs-h'aving gripping-surfacesrbetween which tl-ie-clf-iain Y is'clamped", andfto one' of which thechafinvis' anchored, each of said surfaces being providedwith spaced seats adapted to:ac`commodate the Vcorresponding sides .of lfthe chain-linksg means for?, rotating the other Lof said: rotary, y members to 'thereby :wind the chain. @on the first named member; `'and means fori-prevent` ing backward. rotationof said members inj an unwindi-ng direction.` Y f- 2. In a han-d` brake, the combination @with a chain; of a pair ofsimilar rotary 'members between which the chainis griplpedand "on one of -which the chain is :iadap'tedcto `be wound, each'A of said members having'V seatsfor the chain blinks on i the grippin'gl portions thereof; and 'means-forirotatinglsaidfmembers to wind the chain.` r

s; in a hand brake; the' :Combinati-@i1 with a chain; .ofiaWrotary'chai-n winding` drum; cooperating rotary driving member-,f :said

los

winding drumandldrivingmember .gripping Y Lthe chain therebetween; each membenhaving a pluralit. tof chain-link seats, said seatsof said `mem rs` respectively receiving1-the opi tuatingsaid driving memben Y f 4. In `ahand brake, thefcombination with a chain; of a winding drum' to'which one end Vp'osite'sides ofthe' links; randmeansrforaa'ce rie ofthe chainis anchored, y'thesr'irface of said Y drum being providedlwith spaced seats-mesh ingwith*the chain 1inks;fa rotarydrivifng I' member, said driving Amember rand?? drum grippingv the. chain therebetween, said driv-.

ing member having a gripping surface p'rol vided with seats adapted to bel bro'ughtfinto opposition to the'lseats `of -the/drumrand inV meshing relation with the links ofthe chain; and means for'rotatingfsaid driving member.

` 5. Ina hand brake,ftheifcombination with a chain; of apairA of rotary memberslgrip' ping "the chain therebetween, each' ',of said members having :chain seats EIneshing With kfalternate links ofthe chaifif,"and the' r chain being l anchoredl toene .of Sad' mein` Y the .chain is.. anchored throughimeans. O the.

interposed'v chain Windthe .chain rthere?V rcin-,1:

i f6.[n 'a handbrake, thecoinbinationlwith a" chain; of a chain -Winding .dru-m having thel f chain;V anchoredl thereto.; l A ofA a second drum, said drums ygripping: the. vchain-.therebetween and; having the.chainpengagingpore Y y Y tightening ofv the.fibra-lies.:V i f tions thereof provided With spaced .link re-.

ceivinggseats meshing with alternate l, linksl ofthe chain; al hand Wheel operated lshafi"J towhich they second namedjdrum isfiixed; a ratchet membervrotatable Withthe .Winding drum; .and a vlocking l .dog cooperating with said ratchet member.V 'Y n Y u i 7. In a hand brake, the combination4 With a chain; of apair Vof eccentric rotary mein-V `bers betweenwhich the chain is gripped and to-:o'ne of Which the chain is. .anchcredaiid n'ieansifor rotating the .other .of said rotary.

inembersvto. thereby Windr thelchain--.on "the firstrnamed member.l z

` 8. lnahand. brake, -therlcombination azchain'; of av pair fof similar rotary eccentric meinbersfbetween Which the :chain is gripped and on one ofwhioh thechain is adapted to. be Wound, the meinberfon which the chain is Wound having, at the beginningofthe .Winding .opeiation, the 'chain engaging portionrfof its. gripping surface dispcsed at a lesser :distancefrom the axis of rotation of said-memberthan the distance between the cooperating `chain engaging portion Vof the ltion to Wind the chain.

; andmearis for rotating v said members i 9 'Inl a handy brake',` thei combination with a cha-in;v of? afrotaryg-.chainQWinding drui'n havingxanfeccentricfwinding surface; and a cooperating fdriving membery valso Ahaving lan eccentric Winding -surfa.ce,.j said: Winding Vdrinn and driving memben grip-ping. fthe" chanr therebetween', the cooperating. 1 chain engaging portions of thesurfaces ofsaid drum and member being .sov disposedithat v both of said 'surfaces are? more remote Vfrom l cation of foreeto. eiect final tightening-of the brakes..Y

10. Ina hand brakeithe combination with a; chain.; of-a winding druin to .which the tric with-. .respject V to its l'axis of rotation 4.and i meshing With the links y"of said chain,jthe v Cri-Operating chanengagingi. portions,vr of the tightening operation, thereby; effectingal rapid. takeiip of the brake .chain folloWedby a vheavyV Aapplication 0f .force to yeifect final -l1=. Inj a;handlbrake,v the. Acombination with acha'iii.; of a pair of rotary members gripping .the Achain.therebetyveeii, :each of Said-members 'having a; gripping.: Surface* of.: respeetively, and the lchain being an;

chored to oneioff.said members 5, and means.

Vmeshing with the chaini links, said surfaces of saidmeinbers beingl disposed eecentricaliy vvithrrlespectirto the axes ofi rotation there,V

for .rotating .the v'other Qmeinber to; eect rota-VV tion ofthe member Vto the isan-V chored throughzthegmediiim ofthe interposed chain and Wind the chain, thereon. Y

lZ. ln v'a handwbrakeihth .with a ohain;V of.` a Windingv driim having the ehairi ,anchored thereto a second Vdrum,

Sadlfiiifls stirring' tlf@ Chain; therbtwe and having grippingsurfaces meshing With' the chain links, the gripping -siirface por-` tion cf'each4 drumlbeingdisposed eccentrically iWith.respect to its axis of rotatioi'i, the

coop eratiiig chaiiiV engaging .portions of the posed that saidfsiirfacesfofboth driimsfare morereinote froni'the yaxislof rotation of said driving drum atl'thebeginning of vthe chainwindingoperation.than :at the rapid ytalreiip Vlof ,the brgtkefchaingfollowed .by f 2li-.heavy appli-Casca.fifeft@ effect. final. q tightening of the'brakesga hangt wheel erated shaft.. to which the: ,secondy named ,drinnl isfxed ratchetfmeans for pre venting backward Winding drunk. .f

,message @when In Witness the" .claiming ior'eeiafi have hereiinto subscribed rnynaiiie- 24th ns day of December, 1929 ffl i v WILLIAM H.; MiNiiRv.

endofthe'chain is anchoredythesurface. of l Y. y

links;.and-a rotarydriving drum, said driving drum-and -Winding drumgripping the chainftherebetvveen, said driving drum having agrippng sur-feel@ else grossesses- "lae Y' surfaces of..y said two. drums. being so ds- 190-

Images