Year: 1897

page_text: I. WINFIELD SCOTT ROGERS, Engineer, of Cincinnati, Hamilton County, Ohio,
United States of America, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in planetary gearing, such as is
frequently employed in transmitting rotary motion to a shaft from a pulley
mounted upon it or from such shaft to such pulley, the planetary gearing being
interposed in the transmission system so as to render a change of relative speeds
available.
In my improvement I mount a gear fast upon the shaft and alongside of
said gear I mount a second gear of a different size and loose upon the shaft. The
first gear I term the fast gear and the second one the loose gear. Alongside these
gears I mount loosely on the shaft the main wheel, which may be a belt pulley or
a toothed wheel. On this main wheel I mount a planetary axle parallel with the
shaft and on this axle I mount, side by side, the two planetary gears gearing with
said fast gear and loose gear respectively. I provide a clutch by means of which
said loose gear may be prevented from rotation, under which circumstances, when
said main wheel is revolved the shaft is turned at a relative rate of speed
dependent upon the proportioning of the planetary gearing, according to the laws
of such gearing. I provide a second clutch by means of which the main wheel
may be locked to said loose pinion, under which circumstances, when the main
wheel is revolved, the shaft will be turned at corresponding speed, the transmission
being through the planetary gearing as a driver, the planetary gears in such case
however not turning on their axle, the result being, in either use of the apparatus,
a smooth transmission of the rotary motion. Instead of applying the power to
the main wheel to ultimately transmit motion to the shaft, the power may be
applied to the shaft to transmit motion to the main wheel.
I prefer to construct the main wheel in the form of a casing enclosing all the
gears, and I prefer to form the loose gear with a hub extending outside the casing
at which outer projection it is provided with the clutches for locking it to some
fixed object or to the main wheel. I prefer friction clutches as the means for
locking the loose gear to the main wheel, or to some fixed object when its rotation
is to be prevented, such clutches to be provided with devices by means of which
they may be put into locking condition.
1000

page_text: at two selective relative speeds, or to transmit similar motion from such shaft to
said wheel, planetary gearing is often interposed in the transmission system
between the shaft and wheel to serve in effecting any desired changes in relative
rates of turning. My invention relates to improvements in such devices and its
object is to improve the smoothness and steadiness and accuracy with which the
mrtion is transmitted and to enhance the durability of the mechanism.
:―
My invention will be readily understood from the following description taken
in connection with the accompanying drawing in which:-
Fig. 1, is a vertical diametrical section of a planetary gear system exemplifying
my invention: and
Fig. 2, a vertical transverse section of one of the clutches.
In the drawing:-
1, indicates the shaft:
"fixed gear ":
2, a gear mounted fast thereon and hereinafter termed the
3, a gear mounted loosely on the shaft alongside the fixed gear, and of a size
differing therefrom, and hereinafter termed the "loose gear":
4, the hub of the loose gear, projecting outwardly away from both the mentioned
gears for a considerable distance, this hub, which is virtually a part of the loose
gear, being of course loose upon the shaft:
5, the main wheel, shown as a pulley, mounted loosely on the shaft alongside
the pair of mentioned gears by having its hub fitted to run loosely upon hub 4 of
que loose gear:
6, the planetary axle, mounted in the main wheel parallel with the shaft 1:
7, a planet gear mounted on axle 6 and engaging fixed gear 2:
8, a second planet gear, fast with planet gear 7, and engaging loose gear 3:
9, a removable face-plate or head for the main wheel, whereby the main wheel
is given the form of a casing enclosing all the gears:
10. the bearings for shaft 1:
11, a duplication of the planet axle and planet gears, mounted in the main wheel
opposite the corresponding parts previously referred to, the object of this duplica-
tion being to secure a balance of weight and strains in working as is usual in
planetary gearing:
12, the outwardly projecting hub of the main wheel:
13, a gapped clutch-ring seated in a counterbore in said hub and snugly
encircling hub 4:
14, a pin or screw uniting clutch-ring 13 to hub 4 at a point diametrically
opposite the gap therein, this pin or screw preventing the rotation of the clutch-
ring with reference to hub 4:
15, a counterbored hub surrounding the outer end of hub 4 and rigidly
supported against rotation (being rigidly connected with one of bearings 10), this
hub 15 presenting its counterbore opposite to that in hub 12:
16, a clutch-ring seated in the counterbore of hub 15, this clutch-ring being
similar to the one previously referred to, and being similarly united to hub 4 by
a in or screw:
17, a shifting collar adapted to slide on hub 4 between the two clutch-rings:

page_text: 18, a lever for shifting collar 17 toward either clutch-ring alternatively: and
19, a double ended wedge carried by collar 17, its ends engaging the gaps in
the clutch-rings so that if the collar be slidden in one direction the wedge will
expand one of the clutch-rings and if it be slidden in the other direction it will
expand the other clutch-ring.
Assume that both clutches are disengaged and that main wheel 5 is in rotary
motion, and that there is resistance to the turning of shaft 1. Under these
conditions the main wheel will not transmit motion to the shaft; fixed gear 2
will remain stationary with the shaft; the planet gears will revolve in their
planetary path and will rotate on their axes; and loose gear 3 and hub 4 will
rotate at speed in excess of that of the main wheel in accordance with the law of
planetary gearing as affected by the proportion of the gearing.
If, now, collar 17 be shifted to the right then clutch-ring 16 will be expanded
and will frictionally lock with hub 15, thus locking hub 4 and loose gear 3 against
rotation. Under these circumstances the rotation of the main wheel will impose
rotary motion upon fixed gear 2 and on shaft 1, at a rate of speed, relative to that
of the main wheel, as determined by the proportion of the gears and the laws of
planetary gearing.
If, now, on the other hand, collar 17 be shifted to the left, the clutch-ring 13
will be expanded into friction engagement with hub 12 and hub 4 will thereby
become locked with the main wheel, whereupon all of the rotary parts will turn
together as one body, the planet gears not turning on their axes but acting simply
as transmitting drivers fixed in the main wheel.
In any use of the device the motion transmitted is satisfactorily smooth and
regular and accurate and free from the defects in behaviour which are found in
practice to exist in similar devices not provided with my improvement. While
the main wheel has been considered as the driver from which motion was to be
transmitted to the shaft, it is obvious that the shaft may be the driver for trans-
mitting motion to the main wheel, and it is equally obvious that the main wheel
may be a belt pulley or a gear wheel, and that motion may be taken to or from
the shaft by any desired mechanism of transmission.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is:
1. A shaft fitted for rotation, a main wheel mounted upon and arranged for free
rotation with reference to said shaft, a planet axle carried directly by said main
wheel parallel with said shaft, a pair of united planet wheels on said planet axle,
a gear fixed on said shaft and gearing with one of said planet gears, a gear loose
on said shaft and loose relative to said mäin wheel and engaging the other of said
planet gears, and two clutches adapted alternatively to lock said loose gear to said
main wheel and to lock said loose gear against rotation, combined and arranged
for operation substantially as set forth.
2 A shaft fitted for rotation, a main wheel mounted upon and arranged for
free rotation with reference to said shaft, a planet axle carried directly by said.
main, wheel parallel with said shaft, a pair of united planet wheels on said planet
axle, a gear fixed on said shaft and gearing with one of said planet gears, a rear loose
on said shaft and loose relative to said main wheel and engaging the other of said
planet gears, a clutch having fixed connection with said loose gear and adapted to
be engaged with said main wheel, a second clutch having fixed relation
with said loose gear and adapted to be engaged with clutch-element
fixed against rotation, and devices for producing the alternative engagement of
said clutches, combined and arranged for operation substantially as set forth.
3. A shaft fitted for rotation, a gear fast thereon, a gear loose thereon and having
an extended hub, a friction-clutch carried by said extended hub, a clutch-element
fixed against rotation and adapted to be frictionally engaged by said friction
clutch, a main wheel mounted for rotation on said hub independent of said loose

page_text: gear, planet gears carried directly by said main wheel and engaging the before
mentioned gears, a second friction-clutch carried by said extended hub and adapted
for frictional engagement with a clutch-element carried by said main wheel, and
devices for alternatively engaging said clutches to lock said loose gear to the main
wheel or to said fixed clutch-element.