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Патент USA US2108270

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Feb. 15, 1938.
c. T. ROGERS
2,108,270
FLUID OPERATED CHANGE SPEED GEAR‘
Filed Nov. 24, 1934
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INVENTOR.
C/are?ce 71' Royers
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ATTORNEY.
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Feb.‘ 15, 1938.
-c_v 1'. ROGERS
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2,108,270
FLUID OPERATED CHANGE SPEED GEAR
Filed Nov. 24, 1934
2 Sheets-Sheet 2
INVENTOR.
C/arem‘e T ?agers
ATTORNEY.
2,108,270’
_'Patented Feb. 15, 1938 .
UNITED STATES ‘ PATENT ‘ OFF-ICE. ~'
2,108,270
‘ FLUID-OPERATED CHANGE-SPEED
GEAR
Clarence T.’Rogers, New York, N. Y., assignor to.
' Edward T. Condon, New York, N. Y.
Application November 24, 1934, Serial No. 754,581
4 Claims. ‘ (01. 192-58)
The invention relates to variable speed trans
mission mechanism, more especially of the ?uid
. operated type of change-‘speed gear and whereby
any desired speed ratio between a maximum
5 speed and a zero speed of rotation is obtainable.
The invention has for ‘an object the provision
of the drawings, and looking in the directionvof
the arrows.
‘
_
Fig. 3 is an end view of the mechanismmwith one
of the housing halves removed.
~Fig'. 4 illustrates, in elevation, the application 5
of manually operable means for regulating a valve
controlling the out?ow of liquid.
'
' of mechanism of this nature designed to adjust}
‘Referring to the drawings, a suitable housing
itself automatically to the demands of the ap
is provided comprising, for example, the separ
plied load; also, the provision of means for regu
rable halves Ill and ii, and one of which may be 10 '
lo lating manually the transmission ratio.
provided with a ?lling ,ep'enmg l2 and plug l3
A further object of the invention resides in the therefor, whereby a liquid such as oil ‘may be in
provision of a construction of transmission mech
troduced into the housing for the purpose here
anism which shall be simple and effective and inafter‘ set forth. The position of this ?lling
?exible in operation and which will admit, more - opening in the housing‘ may be so chosen as to 15
if) over, of convenient regulation.
‘
determine the proper‘ volume of liquid to be in- -
In carrying out the invention, a liquid-sealed’ troduced and which is such asto‘?llslightly less‘
housing or driving member encloses a casing than completely the said housing and a contained
which is rotatable therewith but which is eccen-‘ casing hereinafter more fully set forth. The said
' trically disposed therein. Within the casing is housing is designed to be rotated, as by being car- 20.
mounted concentrically with the housing, and for ried, for example, upon a driving shaft l5 which
2O
cooperation with said casing, a drum or rotor . may be keyed thereto as indicated, said shaft ex- '
~member carrying a pair of diametrally disposed tending into the housing through one side thereof
and radially slidable vanes. contacting with the or rather into a ‘trunnion l6 integral vwith the
-' inner surface of the surrounding casing, said housing. ‘
p
'
25
25 vanes continuously maintaining contact with said , v Coaxial with this trunnion and extending in-_
surface. These vanes» form adjoining eccentric ' tegrally from the opposite side of the housing is
_- suction and pressure working spaces in the cas
a further trunnion or bearing I‘! in which is sup
ing, and there is provided through said casing ported for rotation a driven shaft lit,‘ the same
an inlet port to the suction space and an outlet. extending into ‘the interior of the housing and 30 _
30 port or portsthrough the casing from the pres
into a casing 20 which is located within the said
.
sure space.
>
_ The said rotor constitutes the driven element
of the transmission device and its rotation will
be governed by a valve adapted to ?t the said
outletport of the casing, there being provided to
this end means, for applying a desired pressure
_ upon the valve and which pressure may be caused
to vary as the rotational velocity of the driving
, members of the mechanism changes. Provision
40 is also made for maintaining the valve substan
tially free when‘ no rotational motion is being“
transmitted and when the driving engine is idling
and no power is transmitted through the trans
mission gear.
.
‘
‘housing, and ?xed thereto to-rotate'ther‘ewith. _
\
‘The casing 20, however, is not disposed coaxial- .
ly with reference to the driving and driven shafts
I5 and I8 whose axes coincide with the axis of 35
rotation of the housing. There is provided in
the wall of casing 20 a liquid admission port 2|
and a liquid outlet port 22 circumferentially dis
placed therefrom; ~and the latter port is adapted
to be closed by a valve 23 supported on the ex- 40
terior of the casing 20. This valve, when the
transmission gear is not transmitting power, is’
arranged to be substantially free and open; but
is adapted for engagement by a lever, pivotally '
secured’ to the casing 20 and havingv its one arm 45
24 forked and adapted to bear upon the head of
said valve 23. Its opposite arm 25, moreover, is
weighted to maintain valve 23 normally free, and
as for braking purposes.
_
The nature of the invention, however, will best it may support, also, a compression spring 26
be understood when described in connection with " bearing upon said arm 25 andthe inner surface 50
21 of the housing. By this expedient, no pres-_
the accompanying drawings, in which:
Fig. 1 is a detail longitudinal section through sure is exerted upon the valve 23 to maintain it
closed, while the housing is not rotating, as indi
the novel transmission mechanism.
cated in the dotted line position, Fig. 3; but when
Fig. 2 is a transverse section therethrough, on
the housing and the casing rotate therewith at a 55
55 a reduced-scale and taken on the line 2-'-2, Fig. 1
45
In addition, manually operable means may be
associated with the valve for regulating its action,
2
2,108,270
substantial velocity, the centrifugal effect upon
lever arm 25' will tend to increase the pressure
exerted by the arm 24 in opposition to the force
isting within the pressure working space and dis
charge the driving liquidinto the housing when
exerted by spring 26 thereon, as indicated in the
full-line positions, Figs. 2 and 3.
.
the valve, as hereinbefore set forth.
the oil pressure exceeds the pressure exerted on
As the one
vane eventually passes the port 22,.it enters the
to exercise a more positive control or manual reg \ suction pressure space 52, which is filled with liq
ulation over the valve 23 than would be a?orded uid and which is then brought thereby into the
merely by the aforesaid arrangement. To this pressure working space v53 to repeat the cycle,
10 end, means additional to the said lever may be the other vane in the meantime having passed
associated with the valve, or utilized solely, to through the pressure working space to provide
>
regulate its position relatively to the’ outlet the rotative effort. ‘
‘Under certain conditions, it may be desirable
port 22.
I claim:
>
For example, a pin- 30 is reeiprocably mounted
15 in one of the housing'halves with one end bear
ing upon the top of valve 23 while its opposite end
protrudes beyond the housing beneath an over
hanging abutment 3l for _'a sliding and tapered
control member 32. This member engages, for
20 example, with its flat side 33 the said abutment
25
and with “its inclined side 34 the top of'the pin
30, wedging thus between said pin and abutment.
By exerting pressure on the tapered member lon
gitudinally thereof, pin 30 may be shifted ac
cordingly toposition the valve with respect to
.
i 1. ‘A ?uid-operated change-speed gear compris
ing a liquid-sealed housing, a driving shaft for
rotating the same, a casing eccentrically mounted
within the housing and rotatable therewith, said
casing being provided with a permanently open,
peripheral, liquid-admission port and with a pe
ripheral, liquid-outlet port circumferentially
spaced from the said admission port, a valve for '
controlling the outflow of liquid through said out
let port, a lever pivotally mounted upon the eas
ing having its one end adapted to bear upon the
valve and its opposite end weighted to react cen
>
.
trifugally for closing the valve, a spring mounted
A convenient means for shifting the control in the opposite end of the lever and compressed
member is indicatedfih Fig. 4, wherein a longitudi _- between said opposite end and the inner face of
nally slidable member 35 is shown with its one end the housing wall, a rotor mounted concentrically
within the casing and a driven shaft‘ rotatable
working between the outer end of a pin 36, pro
truding beyond the housing 31, and an abutment therewith and extending coaxially through one 30
element 38 attached to the housing. Member 35 side of the housing, and oppositely directed vanes
is linked at the opposite end to-an arm 39 carried rotatable ,with ‘the rotor and slidable radially
by a slidable collar 40 mounted over the trunnion thereof to contact the inner surface of the sur
35 4|. Ilf'he collar, in turn, is engaged by a fork 42
rouifding eccentrically disposed casing, there be
of a bell~crank lever 43 which is secured to a ?xed ing contained within the housing and easing a
its port.
suitable liquid.
support (not shown), it being understood that
both the arm and control member 35 rotate with‘
the said housing.
40
In order to transmit the rotational motion of
the housing and, easing as to the driven shaft l8, ~
there is fixedly secured to the shaft a cylindrical
drum member or rotor 45 located’coaxially with
said driving and driven shafts and housing, but '
eccentrically disposed with reference to the cas
ing 20. ‘and being adapted for osculatory contact
'
'
'
2. A ?uid-operated change-speed gear compris- ;
ing a liquid-sealed housing, a driving shaft for
rotating‘the same, a casing eccentrically mount
ed within the housing and rotatable therewith,‘
said casing being provided with a permanently
open, peripheral, liquid-admission port and with
a peripheral, liquid-outlet port circumferentially
spaced from thefsaid admission port, a valve'for
controlling the out?ow of liquid through said 45
outlet port, a lever pivotally mounted upon the
casing having its one end adapted to bear upon
with its inner surface. In addition, rotor 45 car
ries a pair of diametrally disposed vanes 46 and 41
the valve and its opposite end weighted, a spring
which are radially slidable therein to extend re
50 spectively beyond the periphery of the rotor mem
mounted in said opposite end of the lever and
ber for contact with the inner surface 48 of casing compressed between said end and the inner face
20 as the latter rotates. Provision is made, as of thehousing wall, a, rotor mounted concentri
by means of reciprocable pins 49 and 50 extending cally within the casing ‘and a driven shaft r0
diametrally into the rotor, to force the respective tatable therewith and extending coaxially through,
55 vanes radially outwardly through the action of a
one side of the housing, and oppositely directed
spring 5| compressed between the inner ends of vanes rotatable with the rotor and slidable ra 55
the respective pins.
dially thereof to contact the inner surface of.
the surrounding eccentrically disposed casing,
-The said ‘vanes thus divide the interior of cas
'
20 into adjoining eccentric suction and eccen-'
tric pressure working spaces 52 and 53 for the
; rotor, the former working space 52 being in free
communication with the said admission port 2|
and the latter working space 53 with the outlet
port 22.
65
.
It will be understood, therefore, that as casing
20 rotates with the housing and driving shaft,
for example in a counter-clockwise direction, the
there being contained within the housing and
casing a suitable liquid.
-
3. A ?uid-operated change-speed gear compris
ing a liquidfsealed housing having a pair of op
positely extending trunnions, a driving shaft
keyed to one of said trunnions and a driven shaft\
mounted in the other as a bearing and‘extending
centrally into the housing, a casing‘ within the' 65
housing and rotatable therewith eccentrically
with respect to the driven shaft, said casing be- ‘
volume and the pressure therein will be increased \ ing provided with a permanently open, periph
pressure working space 53 will be. contracted in
70 with the liquid being forced ‘toward the outlet
opening 22, as in the case of a rotary pump. This
will cause to be carried along with the casing'the‘
rotor member 45, the driving force being propor
tional to ‘the pressure tending to close valve 23,
75 the valve opening to relieve the ?uid pressure ex
eral, liquid-admission port and with a peripheral,
liquid-outlet port circumferentially spaced from
the said admission port, a'valve movable with
the casing for‘ controlling the out?ow of liquid '
through its outlet port, a lever. pivotally mounted
upon the casing having its
one end adapted to
bear upon the valve and its opposite end weighted 75
2,108,270
3
said casing being provided with a permanently
to react centrifugally for closing the valve, a
open, peripheral, single liquid-admission port and
spring mounted in the opposite’ end of the lever
and compressed between said opposite end and
with a single peripheral, liquid-outlet port cir
cumferenti'ally spaced from the said admission
the inner face of the housing wall, a pin recip
rocably mounted in the housing having its one
end protruding beyond the same and the other
port, valve means movable with the casing for
controlling the out?ow of liquid through its out
engaging the valve, manually operable‘ means
erating the valve in accordance with the angular
slidable upon the driving shaft trunnion and a
control member actuated thereby for engaging
the protruding end of said reciprocable valve pin,
10 a rotor mounted within the casing, concentrically
with the driven shaft and rotatable therewith,
and oppositely directed vanes rotatable with said
velocity of said casing, additional means acting
let port; means movable with the casing for op
upon said valve for manual operation thereof,v a
rotor mounted concentrically within the casing
and a driven shaft rotatable therewith and ex
tending coaxially through one side of the housing,
and oppositely directed vanes rotatable with the
rotor and movable radially thereof to contact the ‘ rotor and slidable radially thereof to contact the
inner wall of the casing, there being contained inner surface of the surrounding eccentrically
within the housing and casing a suitable liquid. disposed casing, there being contained within
4. A ?uid-operated change-speed gear compris
the housing and casing a suitable liquid.
ing a liquid-sealed housing, a driving shaft for ,
CLARENCE T. ROGERS. 20
rotating the same, a casing eccentrically mount
20 ed within the housing and rotatable therewith,
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