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Патент USA US2121222

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A. L. vFREEDLANDER‘
`2,121,2.22
BELT
Filed March 27. ,1935
2 Sheets-Sheet 2
2
2,121,222
driven pulley is designated Il and is connected on
the shaft I5 to the generatorv I6. 'I‘he generator
is fixed by the attaching plate I'I to the car body.
The term V-pulley turning on aswivel axis is
‘intended to mean where> said pulley and its
mounting move either by a swivel movement; or
' by a movement such as would be obtained when
the pulley is mounted on a truck pivoted to a car
body, as shown in Figure ll; In the United States
10 and Canada railway truck curves, particularly in
yards or stations, may cause the angle between
the truck and the car body to be out of alignment
as much as 23 degrees. In driving generators,
blowers, or other equipment on railway cars, one
15 pulley is mounted on the truck so as to be driven
by the wheels of the truck and the otherppulley
is mounted on a stationary part oi' the railway
car. The present belt will not roll out of the V
curves even when the truck assumes a position
20 of as high as 23 degrees with reference to the car
body. A V-type belt of a cross section such as
shown herein allows the belt to have only a mini
mum surface of contact with the sides of the pul
ley groove. While normally this would ,be con
25 sidered a disadvantage, yet in the present instance
it is a. disadvantage to have any more frictional
contact than is necessary to effect the driving and
antev ñexible section is square-woven fabric laid
on the bias and is designated 2. It preferably con
tains a larger amount of rubber, which I have
indicated in black. The combination of the in-A
creased amount of rubber over that 'found in the
tension and compression sections and the bias
arrangement of the square woven fabric of the
section 2 provides a relatively stretchable section
that acts as an accommodating area. between the
upper and lower tension and compression sections 10
when they are passing around extremely short
centers or there is a lateral swinging of one end
of the belt with respect tothe other when used as
shown in Figure 11. This relatively yieldable in
ternal section 2 permits of short center driving,
driving on small pulleys, and of use with pulleys
that swing with respect to one another. As this
intermediate section 2 is immediately adjacent
the neutral axis of the belt where the minimum
movement should take place, this intermediate 20
section 2 accommodates the relative movement of Y
the compression section.
It also permits of the _
cut away portions forming the teeth being «ex
tended to a depth vgreater than the depth of the
compression section so that the compression sec
tion may be comprised, when desired, in reality
of a series of compression section teeth held to
to prevent slipping, because, in going around a gether by the intermediate bias fabric zone 2.
curve, either one side of the belt or the other, ac
30. cording to whether a left hand or a right hand
curve is being negotiated, presses very heavily
against the side of the pulleygroove, and the
belt has to slide up and down along the face of
the pulley to take care of the shortened distance.i
When the belt is used as shown in Figure 11,
it is preferably an end belt, the ends of which are
joined, as shown in Figure 12, by a connector.
The connector comprises a clamp I8 retained by
screw bolts I9 that pass completely through the
the belt can not slide freely and would tend to
belt and all of its sections. The ends of the con
nector at 20 interengage one another by inter
lacing in the usual manner and have interposed
hang and turn over ,in the pulley groove. The
between them the bearing block 2| _and the pintle
present belt is so shaped to be thick enough to
pin 22.
35 If the side driving faces are of maximum height
The details of this connector form no
transmit the load but at the same time- it does not ‘ part of this invention and it is merely illustrated
..
4o
increase the side driving surface.
This added
thickness permits the belt to have enough screw
strength to permit the use of a connector for
connecting the ends of the belt when desired.
In the present invention the superimposed lay
45 'ers permit lateral flexibility of the belt without
dislodging it from the V-grooves of the pulleys.
This lateral lflexibility is accomplished without
sacriñce of strength by the arrangement of the
several sections of the belt with the woven fabric
50 at angles to `one another. 'The covers additionally
provide a‘uniform, smooth, side bearing surface
despite the lateral flexing of the belt or the bend
ing of the belt. By arranging a large number of
layers of fabric embedded in rubber at angles to
55 one another in a series of superimposed planes, it
is possible to` provide uniform deflection without
bulging, either by lateral movement of the belt or
by bending movement of the belt. This is par
ticularly true when the belt is hexagonal in cross
60 section as the resistance to bending laterally is
primarily in the broadest portion ofthe belt and
in the uppermost portion of the belt.
In the construction of the belt of this invention,
by using the square-woven fabric for the tension
to show the adaptability and method of use of
this belt.
In the manufacture of this belt, the layers
of square-Woven rubberized fabric form a sec
tion I all wound on one another concentrically;
then the same layers of rubberized or rubber
imbedded square woven fabric arranged on the
bias are wound on section I; and then a -plu
rality of layers similar to section I are wound
thereon to form section 3. If it is desired to pro
vide a cover on the belt, the belt material is cut
in trapezoid or hexagonal section and the cover
is wrapped thereon. yIf it is desired to form
teeth on either the upper or under side of thev
belt, or both, the material is sheared away to
form the teeth either before or after the cover
is applied.
'
It will be understood that I desire to compre
hend Within my invention such modifications as
may be necessary to adapt it to varying condi
tions and uses.
y
I claim as new and desire to vsecure by Letters
Patent, is:
and compression sections, relatively incompressi
1. In a V-shaped power belt, a compression
section `comprising a pluralityv of- rubberized
ble bodies so far as lateral compression -is con
square-woven fabric layers, an intermediate sec
cerned, are provided, while the greater length of
the belt as compared with the transverse dimen
sion, will provide sufilcient compressibility and
70 extensibility of vthe sections to constitute tension
and compression sections. , The neutral axis area
00
Having thus fully described my invention, what
tion comprising a plurality of square-woven bias
fabric layers embedded in rubber, and a tension
section comprising a plurality of square-woven
rubberized layers of fabric, said intermediate 70
section being disposed between and adiacenti said
compression section and'said tension section.
is in the lower layers of the tension section.
This arrangement is made possible by 'the use
of theintermediate, more highly flexible section
rubberized square-woven fabric layers arranged
joining the other two sections. This intermedi
with the threads parallel to the longitudinal and 75
2. In a. V-shaped power belt, a ‘plurality of
.
Y
>
`
„
Ä
_ amaca`
- transverse axes of the belt; an intermediate rela
tively iiexible area comprising square-woven
fabric laid on the bias embedded in rubber; and
« a tension section comprising a'plurality of fabric
layers rubberized, arranged in the same manner
as the compression section, said intermediate sec „
tion being disposed between and adjacent said
compression and tension sections.
said intermediate section and opposite said outer
section comprising a- pllll‘ality of square woven
layers of rubberized fabricarranged with the
threads parallel to the longitudinal and trans
verse axes of the belt, and an enclosing cover' of
rubberized _fabric on said belt surrounding said
sections.
_
3. In a V-shaped power belt, a compression
10 section relatively stiff andlinextensible, an inter
mediate section relatively yieldable and extensi
ble, and a tension section relatively stiff and
Y 8. In a belt, an intermediate section compris
ing a plurality of square Woven fabric layers ar
ranged on the bias and Vimbedded in rubber, an
outer section disposed adjacent said intermediate
section comprising a plurality of layers, of square
‘ inextensible and including therewithin the neu
woven rubberized fabric `with the threads arranged
parallel to thelongitudinal and transverse axes of
trai axis of the belt, said intermediate -section
being disposed between and adjacent said com
pression and tension sections,
I3'
verse axes of the belt, an inner sectionadjacent -
_ the belt, an inner section adjacent said intermedi- .
_
4. In a V-shaped power belt, a compression
section relatively stiff and inextensible,- an inter
mediatesection relatively yieldable and extensi
ate section and disposed opposite said outer sec
tion comprising a plurality of square woven layers
of rubberized fabric arranged with the threads
ble, and a relatively stiff andV inextensible ten- _ _
sion section -including "the neutral axis of the
belt, said sections comprising fabric and rubber
vulcanizedto one another and being arranged
with the intermediate section between and ad
jacent said compression and tension sections.
k5. 1n a V-shaped power belt,_ a compression
section relatively stiff and inextensible, an inter
parallel to the longitudinal and transverse axes
of the belt, and an enclosing cover of rubberized
Afabric on~ _said belt surrounding said sections, 4said
cover/comprising an inner U-.shaped cover en
closing the inner surface and side walls of the
belt and an outer cover enclosing the inner cover
` and the outer surface of the -belt.
'
9`. In a belt, an intermediate> section compris- I
mediate 'section relatively _ yieldable and extensi
ble, and a relatively stiif and lnextensible ten
30 slonsection having the neutral axis of the belt
ing a plurality of square woven fabric layersarranged on the _bias and imbedded in rubber,
~ an outer section adjacent said intermediate sec
30
disposed therein, said sections comprising fabric
tion comprising a plurality of layersof`> square
and rubber vulcanized ‘tò‘one another, the _inter
woven rubberized fabric with the threads ar- `
mediate section having a larger amount of rub- ' ranged parallel to the longitudinal and trans
ber and fabric laid on the bias while the tension
verse axes of the belt, an inner section< adjacent
vsaid intermediate section and disposed lopposite 35
woven fabric arranged with the threads parallel said outer section comprising a plurality of square
_to the longitudinal and transverse 'axes of the woven layers of rubberized fabric »arranged with
belt and are disposed adjacent the intermediate the vthreads parallel to the vlongitudinal and trans
35 section and the compression section have square
section and at opposite sides thereof.
#lo
__
6. A belt comprising superposed, compression,
intermediate, and tension sections and an en
verse axes of the belt, and an enclosing cover of
rubberized fabric on said belt, said belt having 40
teeth formed in one of said- sections comprising
' ` 'closinglwrappen said compression and` tensionV . square woven rubberized fabric with the threads
sections being disposed adjacent said intermedi _ arranged parallel to the longitudinal and trans
ate section at opposite' sides thereof and com-` verse axes ofthe belt.
'
prising a plurality of layers of square woven
10.
In
a.
belt,
an
intermediate'section
compris 45
45 fabric with the threads arranged parallel to the
ing a plurality of square woven fabric layers, ar
‘ longitudinal and transverse axes of said-belt, said ranged on the bias and imbedded in rubber, an
- intermediate section comprisingV a plurality of
outer section adjacent said intermediate section _
layers of square woven fabric embedded in rubber
comprising a plurality of layers of square woven
‘rubberized fabric with the threads arranged par 50
allel to the longitudinal and transverse axes of
of the belt disposed therein, saidA wrapper;y com
the belt, an inner section adjacent said inter
prising an inner U-shaped cover enclosing the mediate section and disposed opposite said outer "
inner wall and side walls of the belt and an outer section comprising a plurality of square woven
cover _enclosing the inner cover and the outer layers of rubberized fabric> arranged with the
wall of the belt, said belt having formed in one threads parallel to the longitudinal and transverse
of the outer sections 'thereof teeth comprising axes of the belt, said belt having teeth formed
alternate recesses and projections, and said in one' of said sections comprising a "plurality of
wrapper providing complete coverage of the ex
layersof square woven rubberized fabric with
terna! surfaces of said belt. '
the threads arranged parallel to the longitudinal 60
"1. In a. belt,l an intermediate section compris
and transverse axes of the belt, and an enclosing `
and having `Vthe threads thereof arranged on a
50 bias, said tension section having the neutral axis
ing a plurality of square‘woven fabric layers> cover of rubberized `fabric on said belt, said cover
arranged on >the bias and imbedded in rubber, comprising an inner U-shaped cover. member en
an outer section adjacent said intermediate sec
closing the inner and side walls of the belt, and
tion comprising a plurality of layers of square an outer cover member enclosing said inner cover 65
woven rubberized fabric with the threads ar
member and-the outer surface of the belt. «
ranged parallel to the longitudinal -and trans
'
_ABRAHAM L. FREEDLANDER.
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