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Патент USA US2411974

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Dec, 3, 1946.
L. G. MILLER ET AL
?2,411,974
CAR BRAKE
Filed May 12, 1945
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L. G. MILLER ETAL
2,411,974?
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CAR BRAKE
Fiiled May 12, 1945
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Dec- 3, 1946p
1.. G. MILLER ET AL
2,411,974
CAB BRAKE
Filed May 12, 1943
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Patented Dec.
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iRATENTQOFHCE ?
lumen � STATES2,411,974?
CAR BRAKE ~
Louis G. Miller and Walter?
Static-r, Bethlehem,
Pa., assignors to Bethlehem Steel Company, a
' corporation of Pennsylvania
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Application May 12, 1943,,Serial No. 486,628?
9 ?Claims.
(01. 188----55)~
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1 .
'Fig. 6 is-a detail ?view of the brake equalizer
bar and connecting parts adjacentithereto.
?
? vFig. 7 isa detail section taken on the line "l-?_1
'This invention relates ~tovbrakes for? trucks used
.with industrial cars generally? and in particular
to ,mine carSof the large capacity type carried
on a plurality vof'independ'ent trucks;
ofjllfigi?.
Y? "Due to'the modern trend 'toward mechanized 5 '
mining and long hauls ?from loading to unload
points, it has become necessary for economical
operation to- utilize large capacity cars carrying
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Fig.8 is adetail-section taken on the line 8?8
Eo?Fig. 6.~
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7 Fig. 9' is a? detail ?showing the clevis connection
and. adjacent parts at one end of the operating
in the neighborhood of ten tons or more of coal
Fig. '10' illustrates a? modi?ed form of operating
'or' other material. In attempting to buildI large 10
lever of bell crankishapepivoted to the end-of
?capacitycars, it has been found impossible to
merely'enlarge the presenttype of car, for to do
the car.
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Fig. 11 is a detail section taken on the line
so produces an unwieldy car of excessive weight
ll-ll ?of Fig. 10, and Fig. 1'2'is a detail section
and a car which isincapable of ? negotiating the
~
sharp curves occurring inthe mines. It is an ,15 taken'on the line |2--|2 of'Figilll. ? '
lever.
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f-Referring to the'accompanying drawings and
object, therefore, of the present invention to
provide a brake'for atruck'for large capacity cars? -
offthis'type with independent trucks at eachiend
?rst to Figs. l-to 9 inclusive the two side frames
-'of"the truck, which'are?i of similar construction,
~ar'eforrned?of rolled plate sections cut-in the de- .
of the car.
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. alt is therefore a primary object ofv this invention 20 sired-?shape and welded together. Each consists
of? a pressed Z-shapedsid'e frame member l'of
to provide for vehicles and particularly. for mine
cars, a braking mechanism which will be, simple ~ considerable depth having a vertical web' 2 with
the top'?ange 3 'extending outwardly?and the
of construction," easy andtsafe of operation and
?
?bottom ?ange 4, inwardly and parallel ?with the
'25 top flange? 3? throughout its length. The bottom
Another object of ?our invention is to equally
distribute the braking force to all the wheels in
?anges 4? of the? two side frames support the ends
of a centrallydisposed spring plank 5 of channel
positive in its action in applying thebraking force
to
each wheel.
the
truck.
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shapev andv connects the side frame members
together at this point.
f
The lower portion of the ends of each zeshaped
side'frame member is cut away asat 6 and the
Y.
. Afurther object of our invention relates'to the
manner of o?setting the ends of the brake beam
and connectin'g-thebrake?levers, and brake shoes
:together instead of supporting them'individually
as is the usual practice.
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web 2 recesse'd'as at 1. Each recess is adapted
to receive an inverted U-shaped bearing box 8
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for the axles 9, These inverted U-shaped bearing
. With the foregoing and other objects ineview, '
the invention will/be more fully described here
35 boxes 8 have one leg I ll longer than the other and
are weldedrto the web 2 and thebottom ?ange 4
of the side frame and are adapted to straddle the
axles 9 andtie the ends of- the side frames'and
axles together and transmit the load to the axles.
These bearing boxes 8 each havea bottom tie
40
?plate ll welded'to the legs so that in case of de
railment? the axles'will not become disengaged
from the side frame. Each bearing box 8? and
inafter, and will? be more particularly pointed ?out ' ?
in the appended claims. - 7-
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.
Having thus givena general description of?the
objects of our invention, we will now in order? to
make the same more'clear, refer to the accom
panying four sheets of drawings, forming a part
of this speci?cation and in. which like characters
of reference indicate like parts. ' .
Y
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web 2- of. the side frames are further reinforced
Figure l is a top plan view of a? truck with?o'u?r
improved brake mechanism applied thereto illus '45 by means of vertical and longitudinally extend
trating
Fig. 2the
is aapplication
side elevation?
of our
of the
invention.
truck and I brake
' .
mechanism show?nvin Fig.1.:
'_
Fig. 3 is an enlarged detail section taken on the
line 3-3 of Fig. 4._
1
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'Fig. 4 is an enlarged detail section; taken'on the
ing plates I2 and [3 respectively.
.
Adjacent to the center of each side frame ver
tically inwardly'extending plate members l4 are '
? vplaced-on each side of the bolster l5 and spring
50 plank_5. These vertical inwardly extending plate
members I4 have a ?anged topportion l6 and are
v'welded tothe side frames and are adapted totake
line
� Fi'g?j5
4-4 illustrates
of Fig. 2.~
a horizontallyinclinedoper
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vating lever and connections'mounted on the?end
of the car which is indicated in dotted lines;
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the'side thrusts of the bolster l5 and the spring
plank 5 and maintain the truck in alignment.
55 The ?plate members l4 form column guides for
?2,41 1,974
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3
4
the ends of the bolster and are further provided
with wear plates I? for this purpose.
As shown in Fig. 2 the axles 9 are adapted to
have a slight vertical movement in the bearing
vided with a, tooth 59 for engaging a rack 60.
As indicated in Fig. 5, the operating lever 51 is
shown in full lines in the raised position as it
will be when the brake is released, and to insure
that the operating lever will be held in this posi
tion a projecting rivet 6| is secured to the car
end wall as is the usual practice. When it is
boxes 8 and the wheels I 8 are mounted on the
ends of the axles at the outer sides of the side
frames as indicated in Fig. 1.
desired-to set the brakes the operator grasps the
The brake beams>�-|9? each consisting/of round
?handle 62. of. the lever} andiim?anually' raises it
bar having.their?iends'o?set asv at'ZUand extend
ing through elongated openings 2| in the webs of 10 slightly and then moves it laterally to clear the
rivet head or until it engages the keeper 63 and
then swings said lever downwardly until it as
for the horizontal movement of the brake beams
"sumes the position indicated in dotted lines.
the vertically inwardly extending plates I4 are
cut out as at 22, and the horizontally vlongituldiev V vWhen the brakesware set the spring 54 will be
the side frame members and to allow clearance '
extendedwhereby the brake shoes will be held
nally extending stiifening.plates,_ l3; prevent ,te'
resiliently in contact'with the treads of the wheels.
In Figs. 10 to 12 inclusive we have shown a
The offset ends 20 of the brake beams H! ex; _
modi?ed form of operating lever 64 of bell crank
tend beyond the outer sides of" truck ?frame mem
shape pivotally attached to the end of the car
bers ! and are pivotally connected directly to the .
brake levers and brake "shoes. '
20 as at 65, having a tooth 66 for engaging a rack 61.
In this construction we have used an addi
It will beunderstood that the linkage associ
tional guide sheave .68 for the chain 5|. In this
ated therewith is similar on each side of the
modi?cation the braking force will be applied
truck and a description of one set will apply to
horizontally on the operating lever which might
both. The brake shoes ?23 are pivotally secured
brake beams l9 from turning.
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ion; the ends of the'brake beams and arefurther 25 be preferred in some cases,? insteadof vertically
supported by means of brake hanger links,?
as indicated in Fig. 5, otherwise the operation is
substantially the same as described for Figs. l-to
:which are pivoted at ?their lower ends as at 25'to
9 inclusive, and the same reference numerals will
the- brake shoes and have their upper ends ?piv
oted as at 26 to L-shaped brackets 21 which are
apply; thereto.
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welded tothe top ?ange 3 of the sideframe mem
?Although we have shown and described our
yberv |. The ends-of each of the brake'beams are
also provided with a washer 28 and cotter-pin 29
invention in considerable detail, we do not wish
to be limited to the exact'and speci?c details
for retaining the brake shoes, in position.
shown and described,,but may use such substi
tutions, modi?cations or equivalents thereof, as
are embraced within the scope of our invention
or as are pointed out in the claims.
Having thus described our invention what we
.claim as new and desire to secure by Letters Pat
, _ "The live and deadibrake levers 3|] and _3_| respec
tively are held spaced relation with the brake
shoes ?23, by sleeves ?32 and the web 2 of the side
frame members lby means of sleeves 33._ A link
l34'having a .U-shaped end 35, is-pivoted by means
of a pin 136v- to,;the upper end?, of the dead brake
:lever 3|, whilethe opposite straight end of said
link 34 is attached toga pivotal bracket 31 which
is secured to, the web? 2 of the side frame I.
ent is:
40
.
1. In a brake rigging for railway car trucks
having side frames and two pairs of wheels, a
brake beam at one side of each pair of wheels
extending through and supported by said side
, vThelow'erends of the live and dead?brake levers
are jconnectedtogether by means of a coupling
frames, a brake lever and brake shoe having
bar, v38 whichis pivotally attached thereto. A ? their central portions mounted directly on each
.clevis '39, is pivoted to ithe'upperrend of the live'
extending end of the brake beams at opposite
;_bral<e_-lever. ,30 which is pivoted-t0 one endof a
brake I equalizer bar 49.
outer sides of the truck frame, means for directly
connecting the lower ends of the brake levers to
gether on each outer side of the truck frame, and
This brake equalizer
bar extends through slots 4| in thewebs 2 of the
side framesqand has its opposite end pivotedinl
means connected to the upper end of one pair
a similar manner to the top of the live- brake
lever. on the ppposite side of the truck, and this
brake equalizer ?bar is further supported on wear
of brake levers for actuating the brake levers.
2. In a brake rigging for railway car trucks
having side frames and two pairs of wheels, a
brake beam'disposed adjacent to the inner side
of each pair of wheels extending through and
supported by said side frames, a brake lever and
plates 42secured to the webs 2 of the side frames
adjacent to the slots 4|. The central portion of?
the brake equalizer bar 48 is formed with an arc
shaped track 43 engaged by a roller 44 mounted
brake shoe having their central portions pivotally
between the ends of, a pair of links 45 forming
mounted directly on each extending end of the
ve, pullrod, said pair of links having their opposite
brake beams at opposite outer sides of the truck
ends pivoted tothe intermediate portion of a 60 frame, a coupling bar directly connecting the
swinging lever 48 which is pivoted at its inner
lower ends of'the brake levers together on each
end asatll?l to a U-shapedbracket 48 connected
outer side of the truck frame, and means con
to the car underframe, while the outer end of
nected to the upper end of one of the brake levers
the swinging?lever 4,5 is formedwith a hook 49
?on each side of the truck for actuating the truck
-to engage?a guide'plate 56 which is also attached Y?
to the car underirame; One end .of a, chain 5|
3. In a brake rigging for railway car trucks
.isattached to the swinging lever 46 at a point
having side frames and pairs of wheels, a brake
? ibeneaththe guide plate 50 by means of a pin 52.
beam disposed adjacent to the inner side of each
:Thecha-in 5 |, passes over a guiding sheave 53 and
extends to the, end of the car having its opposite-.1 pair of wheels extending through and supported
by said side frames, a brake lever and brake shoe
end; attached togone end ?of, a. helicalspring 54,
having their central portions mounted. directly
which has its opposite end-attached to a clevis
on each extendingend of the brake beams ad
55, pivotally attached as at 5'6 to a horizontally
levers.
inclined operating-lever 51. This operating, lever
51 is pivotedtoithenar end as. at 58-. andiis pro.
,
.
jjacent to the outer surface of the side frame
. .75
members, and an equalizer bar pivoted to and
2,411,974. '
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5
oted vcentrally in spaced relation to each other
directly on the offset extending end portions of
one brake beam adjacent to the outer faces of the
connectingthe upper ends of a pair of brake levers
having means for actuating the break levers.
4. In a railway brake, a truck frame, two pairs
of wheels? located beyond the outer sides of the
truck frame for supporting said truck frame, U!
side frames, a live brake lever and a brake shoe
pivoted centrally in spaced relation directly on
the offset extending end portions of the other
brake beam, a bar pivotally attached to the lower
ends of the dead and live brake levers on each
outer side of the truck for connecting said brake
brake beams having their endsextending through?
the sides of the truck frame and disposed adja
cent to the inner side of each pair of wheels, a
dead brake lever pivoted centrally directly on
each extending end portion of one of the brake 10 levers together, a link pivotally connected to the
top end of each dead brake lever and the other
beams on each outer side of the truck, a live brake
end to the truck frame, a brake equalizer bar
lever pivoted centrally directly on each extending
extending through the side frame and supported
end portion of ?the other brake beam on each outer
therein connecting the top ends of the live truck
side of the truck, a bar directly connecting the
lower ends of the dead and live brake levers ?on 15 levers together, an operating lever for actuating
the brake mechanism, a ?exible connection be
each outer side of the truck, a pivotal connec
tween the operating lever and the brake equal
tion between the top end of each dead lever and
izer bar, a sheave for guiding the ?exible con
the truck frame, a brake equalizer bar extend
nection, and resilient means interposed between
ing through the truck side frames and supported
therein having an are shaped track connecting 20 the ?exible connection and the operating lever.
8. In a brake rigging for railway car trucks
the top ends of the live brake levers, a pull rod
having side frames and two pairs of wheels, a
brake beam mounted adjacent to the inner side
, of each pair of wheels, said brake beams having
having a roller mounted at one end for engaging
the are shaped track of the brake equalizer bar, a
swinging lever pivotally attached to the other end
their end portions extending through and sup
ported by the side frames, a brake lever and a
of the pull rod, and an operating lever having a
?exible connection with the swinging lever for
brake shoe head having their central portions
actuating the brake mechanism.
pivotally mounted directly on each extending end
portion of the brake beams at the opposite outer
each side of the truck, two pairs of wheels
mounted adjacent to the outer side of the truck 30 sides of the truck frame, means for directly con
necting the lower ends of the brake levers toe
side frames, a brake beam extending through the
5. In a railway brake, a truck sideframe at
' gether on each outer side of the truck frame, an
side frames 'disposed adjacent to the inner side
equalizer bar mounted between the pairs of wheels
of each pair of?wheels, a dead brake lever and
having its ends extending through slots in the
a brake shoe mounted directly on the extending
end portions of one of the brake ?beams outside 35 side frame and supported therein, clevis mem
bers connecting the ends of the equalizer with a
, the truck frame, a live brake lever and brake
. pair of brake levers, and means connected to
shoe mounted directly on the extending end por
tions of the other brake beam outside the truck '
the equalizer bar for actuating the brakemech~
anism.
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frame, a direct connection between the lower ends
9, In a brake rigging? for railway car trucks
of the dead and live brake levers at each side of 40
having side frames and two pairs of wheels, a
the truck, a pivotedlink connection between the
top of each dead truck lever and the side frame, a _ brake beam mounted adjacent to the inner side
brake equalizer bar extending through the side
frames and supported therein comiecting the up
of each pair� of wheels, said brake beams having
their end portions extending through and sup
brake beam extending through and supported by
the side frames disposed adjacent to the inner
pivotally mounted directly on each extending end
portion of the other brake beam at the opposite
extending through the side frame and supported
therein connecting the top ends of the live brake
therein, 'clevis members connecting the ends of
per ends of the live brake levers, and an operating 45 ported by the side frames, a dead brake lever and ' i
a brake shoe head having their central- portions
lever having a flexible ?connection extending to
pivotally mounted directly on each extending end
the brake equalizer bar for actuating the brake .
portion of one brake beam at the opposite outer
mechanism.
sides of the truck frame, a live brake lever and
6. In a brake rigging for railway car trucks
a brake shoe head having their central portions
having side frames and two pairs of wheels, a
outer sides of the truck frame, a bar for con
side of each pair of wheels. a dead and live brake
necting the lower ends of the dead and live brake
lever mounted centrally directly on the extend
ing ends of the brake bea-rns at each outer side of 55 levers together on each outer side of the truck
frame, a pivoted link connection between the top
the truck frame, means for directly connecting the
of each dead truck lever and the outer side of the
lower ends of the dead and live brake levers on
truck frame, an equalizer bar mounted between
each outer side of the truck frame, a pivotal link
the pairs of wheels having its ends extending
connection between the top of each dead truck
lever and the side frame, a brake equalizer bar 60 through slots in the side frame and supported
the equalizer bar with the pair of live truck
levers, an operating lever for actuating the brake
mechanism, a ?exible connection between the op
erating, lever and the brake equalizer bar, a
sheave for guiding the flexible connection, and
levers together, and an operating lever having a
?exible connection extending to the brakeequal
izer bar for actuating the brake mechanism.
.7. In a brake rigging for railway car, trucks v
having side frames and two pairs of wheels, a
brake beam extending through land supported by
the side frames havingo?setend portions dis
posed adjacent to the inner side of each pair of
wheels, a dead brake lever and a brake shoe piv
resilient means? interposed between the ?exible?
connection and the operating lever.
70
LOUIS G. MILLER.
WALTER H. STA'I?LER.
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