Improvements in Speed-changing Devices for Motor Road Vehicles.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Speed-changing Devices for Motor Road Vehicles.
I, BENJAMIN PIERRE LOUIS EMMANUEL JAMETEL, of 41, Cours de Vincennes,
Paris, in the Republic of France, Engineer, do hereby declare the nature of
this invention to be as follows:-
This invention relates to a novel speed changing device for motor cycles.
Upon the shaft of the motor is rigidly fixed a pinion which gears with four
pinions mounted upon shafts fixed upon a plate. Each of the driven pinions is
rigidly connected with another pinion of smaller diameter, and all the said
small driven pinions gear with a pinion mounted loose upon the motor shaft and
rigidly connected with a motor operating pinion for transmitting the movement
to the motor cycle.
The pinion carrying plate is provided upon its periphery with a cylindrical
portion which is adapted to receive externally the action of a brake and internally
the action of a friction clutch.
Upon the motor shaft is capable of displacement a fork which acts upon the
clutch. This fork is provided in addition with a bolt which is adapted to pass
through an aperture formed in the clutch in such a manner as to project in order
to come into contact with the bearing part which is rigidly connected with the
pinion carrying plate.
I will now consider successively the three cases which may present themselves
in this speed-changing device.
These three cases are as follows;
1. When neither the brake nor the clutch is operative, that is to say when the
cylindrical part of the plate is entirely free.
2. When the brake presses upon the cylindrical bearing part of the plate;
that is to say when the plate is rendered immovable.
3. When the friction clutch is operative; that is to say the plate is rigidly con-
nected with the shaft.
1. When the plate is independent.
Under these conditions, the movement of rotation of the motor shaft is trans-
mitted to the pinion rigidly fixed upon it, and this pinion, gearing with the
driven pinions, forces the plate to rotate. The small pinions which are rigidly
connected with the driven pinions perform a satellite movement around the
loose pinion without causing the rotation of this latter. It follows from this
that the motor is absolutely independent of the cycle. This is consequently the
position in which the motor cycle is not driven by the motor.
2. When the plate is held by the brake.
Under these conditions, the movement of the driving pinion forces the driven
pinions to rotate upon themselves, whereupon the plate is rendered motionless.
The small pinions which are rigidly connected with the driven pinions then cause
the rotation of the fixed pinion and the pinion attached thereto therefore transmits
the movement to the motor cycle. This is a first speed.

page_text: 3. When the plate is rendered rigid with the motor shaft by means of the
friction clutch.
Under these conditions, it is by means of this plate that the transmission of
movement takes place, and the small driven pinions cause the pinion fixed to
rotate at a speed different from that obtained in the second case.
It should be understood that if the rate of travel of the motor cycle at the lower
speed is too small to produce a current of air sufficient to cool the motor, I reserve
the right to combine it with a fan or agitator of any suitable kind, for the purpose
of remedying the insufficient air current caused by the travel of the vehicle.
It will further be understood that the brake and the clutch I may be of any
suitable kind.
In a modified form of device the motor shaft carries the pinion gearing with
the toothed wheel of the differential mechanism. This loose pinion is rigidly
.connected with a plate which is provided upon one of its faces with three or four
satellites or pinions mounted loose upon their axes. These latter are maintained
in addition by a washer in order to ensure greater strength.
These satellites or pinions gear on the one hand with a pinion rigidly fixed
upon the motor shaft and upon the other hand with a toothed crown which is
rigid with the cup or plate mounted loose upon the motor shaft.
This cup or plate is provided externally with a brake serving to render the
toothed crown motionless.
Within the cup is keyed upon the shaft the friction, clutch serving to render
the toothed crown rigid with the driving shaft.
The part serving to lock the device is provided with a bolt which, passing
through an aperture in the said part projects from this part and owing to the
rotation encounters the bearing part of the cup or plate thus preventing any
slip of the clutch within the cup.
The bolt projects only when the locking part has already produced complete
locking by friction.
The operation of this device is precisely the same as that which has been above
described. When the cup or plate is rendered rigid with the shaft by means of
the friction clutch, the whole assemblage rotates together; this is the high speed.
If the two locking devices are released, the motor runs free without exerting any
driving action; this is the position in which the motor cycle is independent of
the motor. In the last case, by rendering the toothed crown motionless, the
pinions assume a satellite movement, driving by reason of their movement of
rotation, the pinion which is rigidly connected with the plate upon which the
pinions are mounted; this is the low speed.
Date 11
1-11
,
1 1
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.
potente in peed-changing Devices for Motor Road Vehicles.
I, BENJAMIN PIERRE LOUIS EMMANUEL JAMETEL, of 41, Cours de Vincennes,
Paris, in the Republic of France, Engineer, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:―
This invention relates to a novel speed changing device for motor road vehicles,

page_text: and in order that the same may be readily understood and carried into effect I
will describe the same with reference to the accompanying drawings in which:
Figure 1 is a longitudinal section through a speed changing device embodying
my invention.
Figure 2 is a cross section through the same, and
Figure 3 shews a modification of the device represented in the preceding
figures.
B is the shaft of the motor, upon which is rigidly fixed a pinion C which gears
with the four pinions D mounted upon the shafts & fixed upon a plate G. Each
of the driven pinions D is rigidly connected with another pinion D¹ of smaller
diameter, and all the pinions 1 gear with a pinion E loosely mounted upon the
motor shaft B and rigidly connected with a pinion E for transmitting movement
to the motor vehicle.
The plate G is provided upon its periphery with a cylindrical portion G¹ which
is adapted to receive externally the action of a brake J and internally the
action of a friction clutch I.
Upon the motor shaft B and capable of displacement is arranged a fork K"
which acts upon the clutch I. This fork K is provided in addition with a
bolt K which is adapted to pass through an aperture formed in the clutch I in
such a manner as to project in order to come into contact with the bearing part G¹
which is rigidly connected with the plate G.
I will now consider successively the three cases which may present themselves
in this speed-changing device.
1. When neither the brake J nor the clutch I is operative, that is to say when
the cylindrical part of the plate G is entirely free.
2. When the brake J presses upon the cylindrical bearing part G' of the plate G,
that is to say when the plate G is rendered immovable.
3. When the friction clutch 1 is operative, that is to say, when the plate G
is rigidly connected with the shaft B.
1. When the brake J and clutch I are inoperative, the movement of rotation
of the motor shaft B is transmitted to the pinion C rigidly fixed upon it, and this
pinion, gearing with the pinions D causes the plate Ġ to rotate. The small
pinions which are rigidly connected with the driven pinions D perform a
satellite movement around the loose pinion E without causing the rotation of this
latter. It follows from this that the motor is absolutely independent of the
vehicle.
2. When the plate G is rendered immovable, the movement of the driving
pinion C causes the driven pinions D to rotate upon themselves. The small
pinions which are rigidly connected with the driven pinions 1 then cause
the rotation of the fixed pinion E, and the pinion E¹ attached thereto therefore
transmits the movement to the motor cycle. This is a first speed.
3. When the plate G is rigidly connected with the shaft B, it is by means of
this plate G that the transmission of movement takes place, and the small driven
pinions D¹ cause the pinion E to rotate at a speed different from that obtained in
the second case.
It should be understood that if the rate of travel of the motor-vehicle at the
lower speed, is too small to produce a current of air sufficient to cool the motor,
I reserve the right to combine it with a fan or agitator of any suitable kind, for
the purpose of remedying the insufficient air current caused by the travel of the
vehicle.
It will further be understood that the brake J and the clutch I may be of any
suitable kind.
In a modified form of device represented in Figure 3, B is also the motor shaft
and carries the pinion E¹ gearing with the toothed wheel of the differential
mechanism (which is not represented in the drawing). This loose pinion E¹ is
rigidly connected with a plate E which is provided upon one of its faces with

page_text: three or four pinions D mounted loosely upon their axes. These latter are main-
tained in addition by a washer C in order to ensure greater strength.
These pinions D gear on the one hand with a pinion F rigidly fixed upon the
motor shaft B and upon the other hand, with a toothed crown H which is rigid
with the cup G mounted loose upon the motor shaft B.
This cup G is provided with a brake J serving to render the toothed crown H
motionless when desired.
Within the cup G is keyed upon the shaft B the friction clutch I serving to
render the toothed crown H rigid with the driving shaft..
The part K serving to lock the device I is provided with a bolt K' which
passing through an aperture in the said part I, projects from this part and owing
to the rotation encounters the bearing part G₁ of the cup G thus preventing any
slip of the clutch I within the cup G.
The bolt K projects only when the locking part K" has already produced
complete locking by friction.
The operation of this device is precisely the same as that which has been above
described. When the cup G is rendered rigid with the shaft by means of the
friction clutch I, the whole assemblage rotates together; this is the high speed.
If the two locking devices are released, the motor runs free without exerting any
driving action; this is the position in which the motor cycle is independent of
the motor. In the last case, by rendering the toothed crown H motionless, the
pinions I assume a satellite movement, driving, by reason of their movement
of rotation, the pinion E which is rigidly connected with the plate upon which
the pinions D are mounted; this is the low speed.
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 speed changing device for motor vehicles in which, one of a group of
toothed wheels D 1 (formed in a single piece and adapted to operate after the
manner of planet wheels upon a disc G mounted freely upon the shaft B of the
motor, and submitted to the action of a brake J, and to that of a friction clutch I
provided with a bolt coming into contact with the bearing part G¹) gears with a
toothed wheel C rigidly fixed upon the shaft B of the motor, the other wheel 1)1
gearing with a toothed wheel mounted freely upon the said shaft B in such a
manner that by locking in the ordinary manner the disc G with the shaft B by
means of the friction device I or by maintaining the said disc fixed by means of
the brake J two different speeds are obtained, and that on the other hand by
releasing the disc, the driving mechanism may be unlocked, substantially as above
described and illustrated by the accompanying drawings.
2. In a speed changing device for motor vehicles, the modification described
above, consisting in causing the satellite pinions D) to gear with a toothed disc H
rigidly connected with the plate G; the satellite pinions D being mounted upon a
plate rigidly connected with the toothed wheel actuating the differential
mechanism, and the said satellites D gearing, in addition, with a pinion F rigidly
fixed upon the driving shaft D substantially as above described and illustrated
by the accompanying drawings.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.