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Патент USA US2132994

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Oct. 11, 1938.
E. G. MUELLER
2,132,994
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BRAKE MECHANISM
Filed may?, 19:57
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E. G. MUELLER
BRAKE MECHANISM
Filed May 7, 1957
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INVENTOR
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HIS
ATTORN EY
Patented Oct. l1, 1938
2,132,994
UNITED STATES
'
rA'rENT? OFFICE
~>2,132,994
„
Y
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BRAKE MECHANISM» .
Emil G. Mueller, Swissvale, Pa., assigner
The
American Brake Company, Swissvale, Pa., a. cor
poration of Missouri
Application Mayu, 1937,y serial No, 141,315» ' , .
`1o Claims.
(o1, 18s-46.) Y.
My invention relates tol brake mechanism', and
particularly to improvements ink brake mech
anism of the type described and claimed in an
application for Letters Patent of the United
5_ States, Serial No. 60,535, filed byNorman W.
Tilley, on January 23, 1936, for Locomotive driv->
er brakes.
.
v
which extends transversely'of the locomotive at
»the right-hand side of the'wheels 3. 'I'he brake
beams are all located‘jinjthe same horizontal
plane, whichplaneis disposed rconsiderably be
low Vthe horizontal plane passing through the
vcenters of the wheels.
l
'I'he brake beam 4 is supported for movement
v
One object of my invention is to provide a
between a `brake applying and a brake releasing
brake hanger assembly capableV of îsupporting
position by kmeans vof a'pair of hanger levers 8,
two brake shoes, one for engaging each of two
the upper ends of which are pivotallysecured 10
to the locomotive framer by means of pins 9, and `
thev lower ends of which Yare 4pivotally connected
adjacent driving wheels, whichhanger assembly
shall be so' constructed that the minimum per
missible spacing between the driving Wheels need , with the opposite ends of the 4brake beam, only
be noV greater than that required for thewheels one of the levers 3 being shown in theV drawings.
to clear themselves.
Í
~
.Í ..
Other objects and characteristic featuresgof
my invention will appear as the description pro
ceeds.
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Secured to each of the levers-8 intermediateY its .ç
ends is'. abrake headl I0 carrying, a brake shoe
Il whichjiwhen theybrake beam 4 is moved to
its brake applying position, is adapted to en.
I shall describe one form kof brake mechanism gage thetread of the'wheel I in a zone located
20 embodying my invention, Yand shall then point -some distance vbelow the horizontal plane passing 20
out the novel features thereof in claims.
`
through‘the axis of the wheel.
~ l'n the accompanying drawings', Fig. 1 is aview,
partly diagrammatic and partly inside eleva
tion, showing" one form of brake Am’ec'hanisri'i 'em
25
bodying my invention applied to theV driving
wheels of a locomotive -having three pairs'of'driv
ing wheels. `Fig. 2 is a plan view of the brake
`rigging employed in the brake mechanism shown
in Fig. l. Fig; 3 is a side view of one of the
30 Vhanger assemblies forming part of the brake
' '
,
-between ra,VV brake _applying anda brake releasing
positionl by means` of two lhanger ’levers I2, one
’of which is located’ateach sideV of theîlocomotive. 2,5
VOnly one of the hangerglevers I2 is` shown in
the drawings, and asbest seen in Fig.'4, ‘this
hanger 'lever comprises 'an upwardly extending
arm l2“, therupper‘end of which is'formed with
’ an Voilîset portion 4which-extends into the >plane 30
mechanism shown in the preceding views. Fig. 4
of the Wheelsîat'one side of the adjacent wheel '
is a side View of one of the hanger levers I2
3, »and the' lower end of which lis formed inte
grally with a shaftl |21'. The shaft `I2b is jour
naled in a suitable bearing I3 formed in the loco
motive frame, and is`provided at the end oppo 35
site to the `arm I 2E with `a reduced portion I2d
to which a depending'arm |29 vis secured. ï Each
arm I2° is disposed some distancefinside ofthe
plane of :the wheels, -as willfbe Yapparent ’from
kan inspection of Fig; ‘4, and the'lower ends of
forming part’of the brake mechanism shown in
the preceding views.
35
'
_ Thebrakegbeam 1 is supported for movement
'
`
Similar reference characters refer to similar
parts in each of the several views.
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'Referring to the drawings, Ihave here‘shown
brake mechanism embodying my 'invention `»ar
ranged for use in connectionwwithV thef’driving>
40 wheelsk I, 2, and 3 of >Valocomotive» of the‘t'ype
having three pairs' of- driving- wheels‘locatedïas
closely together asthe necessary'clearance ‘be-,
tween the wheels themselves will permit in order
Vto decrease the overall length of the locomotive,
45 `and thus facilitate the Vnegotiation oi'- curves by
the locomotive, the various parts Yof the loco
motive other than >the‘driving wheels being omit
.ted from the drawings to simplify the» disclosure.
these arms are pivotally ` connectedwith the
brake- beam -Tin supporting relation thereto at
the oppositefendsof Vthe brake'beam.V `'The arms ,
‘I2a`are each providedl attheir upper ends with a
brake-head ¿I4 carrying agbrake' shoe I5 which, 45
when thebrake beam 'l is moved to its brake
applying position, is adapted to engage the tread
Yof' the whee1f3 in a zone', located approximately
The brake mechanism comprisesa brake beam
the `same 'distance above the horizontal Lplane
50 4 which extends transversely of the'locomotive at
passing through the axis of’theïwheels 3, that
the left-hand side Yof the wheelsY I, a> brake beam AztheV zone, in which the shoes II are adapted to
5 which extends transversely ofÍ the,- locomotive engage the `wheels I is located below- the plane
between the Wheels lj and 2, a brake ¢ beam~^6 ` passing through the axis Iof the wheels I. ,
which extends transversely of the locomotivel be
, `The brake beam-'Bris supported at'each end
55 tweenthe wheels 2 and '3, andra, praise, beam 1
¿for ,movement ¿between a Vbrakewapplying- and a
50
2
2,132,9e4
brake releasing position by means of a hanger
assembly comprising a pair of hanger levers I6
which extend downwardly on opposite sides of
the closest portions of the adjacent wheels I and
2 with considerable clearance in the manner
shown in Figs. land 3, and which are each pro
vided at their lower ends with ahole I1 for the
reception of the rounded end of the brake beam
is located diametrically opposite to that in which
the shoe 26 is adapted to engage the wheel 2.
The brake mechanism also comprises means
for actuating the brake beams between their
brake releasing and brake applying positions to
eiïect the application of the brakes. As here il
lustrated, these means include a >pair of brake
5.
locomotive. VrThese brake cylinders are of similar
The hanger levers 16 are pivotallyk secured>
cylinders C which are mounted at one Vend of the
intermediate their ends to a second pair of hang
construction, and‘inasmlich as they form no part 10
er levers I8 intermediate their ends by means ofA my present invention, except in so far as they
of trunnions I9 which are formed integral with' v"are used in connection with the remainder of
the levers I5, and which extend through vclear-. the brake' mechanism, it believed that for pur- n
15
ance holes 20 formed in the levers i8; and piv
otally supported vby the leverslß. at theirupper
ends are brake headsfZl carrying brakeshoes"
V22 which are adapted toy engage the treads of the
tothe zones in which the shoes Hare adapted y
20
to engage the wheels l. lThe hanger >levers I8
vof each pairare disposed inv planes. located out
side of the planes> of ytheY contig-unas“hanger` le
v V'vers I6, and are pivotally*supportedV atïtheirup»`
. per Vends by rmeans of `pins lor »boltsA 23 vmounted. ‘in
'spacedflugs 24. formedfonfthe locomotive frame'.
The lower ends of the levers'lS havepivotalìy se
Acured‘thereto >brake `h'eadsV 25 carrying brakes
. shoes 26 which areadapted to engage the VVwheels
Y2 inV zones which 'arel'ocated the same distance
.below the axisof'the wheelsl'2 `asthe'zonesin
which the shoes 4Il carrie'd‘by the hangerlevers
8 are adapted' to engage’thewheels i.; ` The
Aproper spacing between thetleversfiß -.at their
lower' endsjis maintained by means V'of bosses 21
formedV` onn the . levers, 'while 'the' ' proper Í spacing
between these levers 4at their upper ends is'main
tained' by the associated `>brake 'head 2‘Il`."ÍfThe
spacing "between the levers Vl 8 at their upper'ends
ismaintained by one‘of'the'lugs 24,'.and yat their
40 lower ends‘ by rthe associated brake headlli.
The '
distance which the’louter levers IB'and'I B’Yof each
hanger assembly is spaced Yfrom'îtheî'outer'fáïces
of the associated wheels
lnotîsuflicient vto* in'
terfere with thev side rodsvoiïthe'locomotiveì ‘ "
45
poses of thepresent disclosure, it is sufñcient to .
state that these brake cylinders each include
the usual cylinderbody, reciprocable piston (not
shown) biased to the inner end of its stroke by
wheels I in zones located diametrically'opposite ' the’usual'releasè spring (not shown),r and a push
‘The >brake beam ‘B is suppòrt'edat each end
.for movement between -a-brake "applying and a
brake releasing position ¿by means Vof'a hanger
assembly, the various parts ' of fwhichl are Vsimilar
to the corresponding" parts of . the :hangeras
50 semblies'for supporting theîbrake beam 5,' and
the parts of 'the hange?ï assembllesïforV support
ing 'the brake beamB are designated bythe same
`reference characters Yas the corresponding'. parts
-of the hanger assemblies’ior supporting Vthe brake
beam 5, with the distinguishingexponent Il added
thereto. Sincethe parts of the hanger assem
.blies for supporting the'brake beam 6 are similar
'to thosefof the hanger assemblies` for supporting
thefbrake' beam v5, it‘is believedV that thev con
60 struction'of'these parts willllbe apparent from an
inspection ofthe drawings >and from theforegoing
description . without further detailed ' description.
rod 52 which is operatively connected vtdth' the
piston.
`
20
'
" The Vpush rod 52 of each cylinder C is con
nected with the upper end of an associated ver
tically disposed brake cylinder lever 33 which is
pivotally supported intermediate >its ends on a
transverse shaft 34, and the lower ends of the 25
vbrake cylinder levers 33 are each operatively
connected with an associated horizontally dis
posed iioating lever 35 intermediate its ends by
means of .a >pull rod 36. The transverse shaft 34
is _adapted to .be secured at VYits ends- in‘ suitable V30
supports (not shown) rnountedfonv the engine
frame. Each pull rod'EB is provided at the end
which is connected to the associated floating
lever 35 with a' slackadjuster'3‘! of well-known
construction. The inner endsA of v:the floating
'levers' 35, arev connected by means'of’pullV rods 3S
`with theV brake beam 1VV at points equally spaced
from its ends, while the outer ends of the floating
levers'35 are connected by means of pull rods 39
>with equalizing levers 4ll'at points intermediate
the ends of the levers '40. VEach pull rod 38 is
provided at each end with a jaw which receives
the associated lever y35 or brake beam l, as the
»case may be, the jaw on the one pull rod 38 being
made sufñciently .long to completely straddle the
floating lever- 35 which is'not'connected to this
pull
rod.
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35
.
All()
î
Y
The equalizing levers 40 are eaclrcorlnected at
their.inner ends with the brake beam Bat points
equally spaced from its ends through the medium
oflinks 4|, and at their outer ends through'the
medium of pull rods 42 with other equalizing lev
ers 43 intermediate their ends.- The pull rods 42
are each provided at the end which is connected
to the. associated equalizing lever 4l) with a jaw i »
which straddles thev brake beam 6 and which
¿receives.therfequalizing lever, and at the opposite
Yend withya `jaw which receivesA the associated
‘,equalizing. lever `43.
'
l. ‘
¿The equalizing levers 43'are each connected at
rrtheir inner ends with the brake beam 5 at points
equally'fspaced Afrom its endsbysmeans of links
lThe hanger levers 181 of .each hanger. assembly
44 while the outer ends of these equalizing levers
' for"'supporting-thermes ’beam '6. arepivotany
are each connected by means of .a pull rod 45 with
vmounted at'their upper ends on a pinlorbolt 23%,
>thebrake beam 4 at pointsîequally spaced from its ï
¿and are provided at their lowerI ends with~ 'a brake » ends. ‘ The pull rods 45 areprovided at the ends
fhea‘d ’23 carrying? a brake V'shoe '3U which vis.
which are connected with the equalizing levers 43
’adapted to engage the tread ‘of the associated
.with'a jaw-which straddlestheY brake beam 5 and
.receives the'Y associated equaiizing lever', and' at
fwheel Sfin aizone'located diametrically opposite
70 to lthat inwhich the shoe 'I5 lor .such wheelis
adapteduto engage the tread of the wheel. "'.Each '
’pail` of hanger levers §51 is provided at'the upper
,ends of thejlever's with a brake head v3| carrying
their opposite ends Ywith a jaw> which receives 'l
the brake beam 4.'
ï
7
A
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' When the brake cylinders are vented to atmos
phere,_ as will normally be the casefthe brake
beams are held in theirbrake releasing positions
rtread' of theïassoèiated wheel 2 in the -zon’e ¿which Y in whichfthey are shown in the drawings by the "
Ya brake shoe 32V which» isv ada'pted to engage lthe
`
3
releasing springs mounted in the brake cylinders, limited îonly to that `required for the wheels to
and under'these conditions, thepbrake shoes exert >clear themselves'.` I ï
substantially no braking effort on the wheels.
When it is desired to apply »the brakes, fluid
~ fAnotlierV advantage of brake mechanism em
bodying‘my’inventionristhat the pivotal connec
pressure is simultaneously supplied tor the two tion between the brake'r hangers themselves,> be- f
tween 'the brake hangersrand the brake shoes,
and between the brake hangers and the associated
brake cylinders C, which fluid causes'each ’of the
push rods 52 to move outwardly in theY associated
cylinder in opposition to the bias of the release ~ brake beams are so arranged that substantially
springs. This movement ofthe push rods acts no _torsional stress -is` exerted onthese members
' Y
through the linkagershown in Figv.~2 Yto move the ' _during an application of the brakes.
brake beams 4, 5, 6, and ‘Ito their brake applying Y
positions in a manner which will be readily-'under
stood from> an inspection of the drawings. The
movement of the brake beam '| `to its brake ap
plying position causes the associated hanger levers
l2 to rotate in a counterclockwi'se direction, and
hence causes the brake shoes |5 securedto these
'-_Although I have hereinfshown and described
only one form ofwbrake'mechanism embodying
my invention, `it is Vunderstood that various
changes and modifications may 'be made therein
within the s'cope’ofthe appended'claims without
departing from the spirit andv scope ‘of my inven
tion.
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A.
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Having thus -described, myinvention, what> I
vlevers to engage the wheels 3.` '
On the initial movement of the brake beam 6
to the right, the hanger levers |61 rotate about the
claimisvt’k
trunnions |91 on which theyV aresupported vfrom
thevlevers |81, and the associated brake shoes> 32
_at -least rtwo longitudinally'aligned» wheels at ‘
move into engagement with the wheels 2. >
i"
H
Y
_`
»1.'In a.> brake mechanism for a vehicle having
one side of` the vehiclearranged closely‘togetlier,
a first pairvr of hanger levers disposed von opposite
sides of the closest portions of said wheels and
>to the right,~the levers | 61 rotate about the pivotal pivotally attached at one end to the vehicle and
connection between these leversand the associat-V ` provided at the otherrend with a brake shoe which
ed brake heads 3|, and thus move the levers | 81 in Y is adapted to engage one of said wheels, a. second
a counterclockwise direction about the pins 231 on pair-ofîhanger levers disposedon opposite sides
which they are supported from the' locomotive of saidwheels and pivotally'V attached to thelevers
frame. On >the movement of the levers |81, the of said firstrpair 'and provided at Vone end with a "30
brake shoes 30'c‘arried by these levers are moved brake shoe which is adapted to engage the other
into engagement with the wheels 3, and- on the 'Y wheel, and.> means' connected Vwith the levers of
completion of the movementof the brake beam 6 said second pair at `the ends opposite tothe
to its brake applying porsitiomthe shoes 30 and 32 associated shoe for actuating the levers -of -both
are ñrmly pressed _against the Wheels 3 and` 2, pairs to press the shoes into engagement with said =
Upon further movement of the brake beam‘B
Y
_ respectively.
‘
AVThe movement of the brake beam Stoits brake
applying position acts through >the hanger levers
~ 'I6 and `I8Y to press the brake‘shoes 25 and 22
against the wheels 2 and |, respectively„in’ the
2. Inra. brake mechanism'for a vehicle having
a plurality of pairs of vwheels located `closely to
gether to >facilitate negotiation of curves by'the
vehicle, a first pairof hanger levers disposed on
same manner that Vthe movement of the brake 5 opposite sides ofthe nearest portionsof two ad
- beam 6 to its brake applying position acts through jacent lwheels at one side of thevehicle and piv
the hanger levers |61 and |81 t'o press the Vbrake ' otally attached at one Yend to the vehicle and pro
shoes 30 and 32 Aagainstthe'wheels'3'and2. `
»vided at'the other ena with a brake snee which is
Themovement of the brakebeam 4 to its brake ' adaptedto engage one of saidtwo adjacent wheels, v
applying >position causes the`> associated» hanger
a- second pair of hanger leversv disposed on op'
levers 8 to rotate in a counterclockwisel direction,
and hence causes the brake shoes v|| to become
posite sidesof the contiguous portions lof said two
>adjacentwheels Vand pivotally attached to the
pressed
It will against.
be seen,the
therefore,
wheel |.that lwhenY
- Y fluid
. . pres
'
levers of saidvñrst pair and provided at one end
with a brake shoe which is adapted to engage the
otherof said twoadjacent Wheels, a brake beam
sure is supplied to the brake cylinders C', all of
the brake shoes are pressed-against'the wheels,
and the action of the brakemechanismfis lsuch
that a substantial force effective to press any of
lthe shoes against the wheels willnot be developed
until all of the shoes have been moved inte en
gagement with the wheelswith which they are
associated, and thereafter the kforce effective to
pivotally connected with the levers of said second
pair at the endsvopposite to the associated shoes,
and vmeans for movingk said brake beam between
,brake applying and brake releasing Apositions to
vactuate the levers of both pairs. Y
s
' ç> 3. Inra brake mechanism for a vehicle having
a. plurality of pairs of‘wheels llocated closely to
gether to facilitate'negotiation of curves by the
press each of the shoes »against'the' associated
wheel is approximately the same. `This-"insures
that substantially the same braking'effort will be
developed on each of the wheels of the locomotive.
When the fluid supplied to the brake cylinders
of the brake mechanism is subsequently vented,
’the release springs movethé push rods into the Y
provided at the other end with a brake shoe which 65
is adapted to engage one of said two adjacent
brake cylinders towtheir retracted positions, which
Wheels, a secondpairV of hanger levers disposed on'
vehicle, añrstpair of hanger levers disposed on 60
opposite sides of thecontiguous portions of two
adjacent 'wheels on one side of the vehicle and
pivotallyY attached at one end to the vehicle and
movement releases the force tending to press the j opposite sidesv ofthe contiguous portions of said
` shoes against the wheels, and hence releasesthe two adjacent wheels and pivotally attached in
termediate their ends to the levers of said ñrst pair
70
One advantage of brake mechanism embodying intermediate their ends and provided at one end
brakes.
s
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,
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Y,
my invention is _that since none îof the pivotal con- ~ with a brake shoe which is adapted to engage the
nections for any of the brake hanger leversis lo `other of ' said two adjacent wheels, and means
cated between thewheels, the minimum spacing ‘connected’
76 winch must> be> provided «between ' the wheels is
thel levers of said> second pair at
the ends opposite to the associated shoe for ac
75
14
52,132,994 '
tuating the levers of both pairs‘to press the shoes
into engagement with the associated wheels.
,4. In'a brake mechanism for a vehicle hav
ing a plurality of pairs of wheels located closely
together to facilitate negotiation Vof curves by the
upper endsto "the,y vehicie and p'ròvided at their
Y closest portionsof saidrtwo adjacent wheels, a
above theV horizontal plane extending through
Vlower ends with abrake shoe which is'adapted
to engage one of said two adjacent wheels at a
>zone >located below _the horizontal plane extend
ing through ythe'axes of the wheels, a second pair
vehicle, a first pair of. hanger levers disposed on ' of hanger-levers disposed on opposite sides of the
opposite sides of the closest portions of two ad , contiguous portions of said two adjacent wheels
jacent wheels on the same sid-e of the vehicle and and pivotally attached intermediate their `ends
pivotally attached at their upper ends tothe ve
to the levers of said first pair intermediate their
f10 hicle and provided at vtheir lower ends with a ¿ends and provided `at rtheir upper ends ’with a 10
brake shoe which is- adapted to engage the tread brake'shoe which is Aadapted to engage the other
of one of said two adjacent Wheels below the of said two adjacent wheels at a zone located
second pair Vof hanger levers disposed on opposite . the axes of the wheels, and means connected with
sides of the closest portions of said4 two adjacent
l'wheels and pivotally attached intermediate their
ends to the levers of said first pairintermediate
>their ends and provided at their upper ends with
a brake shoe which is adapted to engage the tread
A:20 -ofitheother of said two adjacent wheels above the
-closest-portions >of said two adjacent Wheels, and
means connected -with the levers Yof saidsecond
pair at their lower ends for actuating the levers
of both pairs to press saidbrake shoes into ven
gagement with the associated wheels.
the levers of said second pair at their lower ends
for actuating the levers of both pairs to press
said brake shoes‘into engagement with` the asso
ciated wheels.
‘ì
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¿
_
8. In a'brake mechanism for ajvehicle having
at least one pair of wheels, two'brake beams ex
tending transversely of the vehicle ‘on opposite
sides of said pair of wheels below the horizontal
planel passing through their axes,V two hanger
levers ‘one located at each Vside of the vehicle
-
and each comprising an upwardly extending arm .25
secured at itszlower end to a shaft journaled in
the locomotive frame. and aV depending arm se
5. Ina brake mechanism for avehicle having a
plurality of pairs' of îwheelsr'located closely to
gether -to facilitate negotiation vof curves by the
vvehicle,'a first pairîof hanger levers disposed on
cured to said shaft-at the rend opposite to said
upwardly extending arm, each said upwardly'ex
loppositel sides of the'closest portions ofV two ad
jacent Wheels on thesame snideV of the vehicle >and
Vtending arm being providedwith an offset por
tion which extends into the'plane of the associ
pivotally attached ‘at their upper .ends vto-»the
vehicle and provided at, their lower ~ends with a
ated wheelV at one side thereof above the axis of
So
the wheel and which carries a brake shoe for en
gagement with the associated wheel, j and said
,brake shoe ,which is adapted Jto-'engage the tread
of one of said two adjacent wheels,v a second pair
of hanger levers disposed between the levers of
said first pair and said two adjacent wheels and
pivotally attached intermediate: their ends tothe
levers of said ñrst pair intermediate .their ends
downwardly extending arms being pivotally se 35
cured to the opposite ends of one of said brake
beamsin supporting relation thereto, other brake
shoes disposed on the Vopposite sides of said
wheels from the shoes connected with'said hang
er levers fand Voperatively connected withv the 40
and provided at their upper ends with` a brake
v 24o sho-e which is adapted to engage the `tread of the other brake beam, and means for actuatingysaid
other of said two adjacent wheels, and means con- ' brake beams to cause. said brake .shoes to fric
nected with ’the levers of said second pairat their
tionallyengage the associated wheels.
lower ends `foractuating the levers Aof both pairs'V
vto press said -brake shoes into engagement with
the associated wheels.
.
' gether to facilitate negotiation of curves by the »
Y to
`
tending transversely of the vehicle on opposite
sidesof‘said pair of wheels below the horizontal
planepassing through their axes, `two hanger le
,
6.`In a brake mechanism for a vehicle having
a plurality of pairs of wheels located closely to
55
' `
9. In a brake mechanism for a vehicle having
at least one pair of wheels, two brake beams ex
vers one located at each side of the vehicle and
vehicle, a first pair Vof hanger levers disposed on
opposite ‘sides of the closest portions of two ad
`each comprising an upwardly extending arm se
jacent wheels and pivotally attached'at one end
to the vehicle and provided at the other end with
a brake shoe which is adaptedto engage the
the locomotive frame and a depending arm se
tread of one of said two adjacent wheels at a
zone located below the horizontal plane extend
ing through the axesïof the Wheels, a second pair
>of hanger levers disposed on opposite sides of
the closest portions of saidmtwo adjacent wheels
and pivotally attached tothe levers of said first
cured at> its lower end to a shaft journaled in
cured to saidl shaft at the end opposite to said
upwardly extending arm, each said upwardly ex
tending arm beingrprovided with an offset por
tion which extends-into the plane of the associ
ated wheel at one side thereof above the axis of
the wheel and which carries a brake shoe for '
engagement with'the associated wheel, and said
downwardlyextending arms being pivotally se 60
.pair and provided at one end with a brake shoe
cured to the opposite >ends of one of said brake
which is adaptedV to engage the tread of the
other of; said two adjacent ~wheelsçat- a zone‘lo
ycated above the horizontal plane Vvextending
beams in supporting relation thereto, other brake
shoes .disposed on the opposite sides of said wheelsV
from the shoes connected with said hanger levers
>and'operatively connected with the other brake
beam,7and meansy for simultaneously actuating
through the axes of the wheels, and meansv con
nected with ’the levers- of said second pair at
theirlower ends for actuating the ‘levers of both
said one brake beam away from said one pair of
¿pairs to press said Ibrake shoes into engagement
' wheelsand said other brake beam toward said
with _the associated wheels. ’
Y
one pair of wheels to cause said brake shoes to
.70 , 7*. Ina brake mechanism for a vehicle having i frictionally engage the associated wheels. Y
70
a plurality of pairs of wheels located .closely‘to
10. In a brake mechanism for a vehicle having
gether to facilitate negotiation of >curves bythe
at least one pair rof 4wheelatwo brake beams ex- `l
Y vehicle, a first pair of hanger levers disposed on
tending transversely o'f the vehicle on opposite
«opposite sidesrof rthe closest Vportions ofv two `ad
sides' of saidv pair of Wheels below the horizontal
jacent wheels‘ and pivotally attached at. their plane passing throirlghntheirY axes, tworhanger
2,132,994
levers one located at each side of the vehicle and
each comprising an upwardly extending arm se
cured at its lower end to a shaft journaled in the
locomotive frame and a depending» arm secured
CR to said vshaft at the end opposite to said up
wardly extending arm, each said upwardly ex
tending arm being provided with an offset por
tion which extends into the plane of the associ
ated wheel at one side thereof above the axifs of
10 the Wheel and which carries a brake shoe for en
5
shoes disposed on the opposite sides of said wheels
from the shoes connected with said hanger levers
and operatively connected with the other brake
beamytwo ñoating levers connected at one end
with said one brake beam at points equally spaced Ul
from its e'nds and at the other end with said
other brake beam at points equally spaced from
its ends, ythe point of connection of each floating
lever with the one brake beam being at the op
posite yend of the beam from its connection with 10
the other beam, and means for actuating said
floating levers connected with said ñoating levers
gagement with the associated Wheel, and said
downwardly extending arms being pivotally se
cured to the opposite ends of one of said brake intermediate their ends.
beams in supporting relation thereto,` other brake r
EMIL G. MUELLER.
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