Improvements in Driving Gear suitable for Automotor Cars and other purposes."
Year: 1896

page_text: Date of Application, 11th Dec., 1896
Complete Specification Left, 10th Sept., 1897-Accepted, 11th Dec., 1897
474
PROVISIONAL SPECIFICATION.
"Improvements in Driving Gear suitable for Automotor Cars and
other purposes."
We, WILLIAM THOMAS SHAW, Chairman, ISAAC WATTS BOOTHROYD, Director,
and ARTHUR SYDENHAM, Director, of the Crypto Works Co., Ltd., all of No. 29,
Clerkenwell Road, London, E.C.,, do hereby declare the nature of this invention
to be as follows:-
By means of our improved gear we are enabled to propel the driven wheel at
two different speeds, according as speed or power is required; to propel it back-
wards without reversing the motor; and to release it from the driving gear so
as to admit of the motor running on without driving it.
The train of wheels employed is similar to that used in the well known
Crypto" gear, consisting of a central pinion, an internally toothed wheel,
and intermediate between these four or other number of planet wheels or pinions
carried by a stud disc with an independent rotation of its own.
As is well known the result obtained from a train of wheels made up of these
three components, depends upon which of them is made the driver and which the
driven. In our present arrangement the central wheel is in all cases the driver;
and the four several -states of the gear are thus produced.
(1). For the lower speed (increased power being required) the internally
toothed wheel is held in a fixed position, and the stud disc is connected to the
driven wheel.
(2). When the high speed is required both the internally toothed wheel and
the stud disc are locked to and revolve with the central pinion and driven wheel.
(3). When it is desired that the motor (whether rotating or at rest) shall be
disconnected from the driven wheel, both the internally toothed wheel and the
stud disc are set free from the other parts.
(4). When it is desired to reverse (the motor still continuing its forward
motion) the stud disc is held fast and the internally toothed wheel is clutched
to the driven wheel.
Dated this 11th day of December 1896.
WM. THOS. SHAW.
I. W. BOOTHROYD.
A. SYDENHAM.
COMPLETE SPECIFICATION.
"Improvements in Driving Gear suitable for Automotor Cars and
other purposes.
We, WILLIAM THOMAS SHAW, Chairman, ISAAC WATTS BOOTHROYD, Director,
and ARTHUR SYDENHAM, Director, of the Crypto Works Co. Ltd., all of No. 29
[Price 8d1

page_text: Clerkenwell Road, London, EC., 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:-
By means of our improved gear we are enabled to propel the driven wheel
at two different speeds, according as speed or power is required, to propel it 5
backwards without reversing the motor, and to release it from the driving gear
so as to admit of the motor running on without driving it.
The train of wheels employed is similar to that used in the well known
"Crypto" gear consisting of a central pinion, an internally toothed wheel, and
intermediate between these four or other number of planet wheels or pinions 1
carried by a stud dise with an independent rotation of its own.
As is well known the result obtained from a train of wheels made up of these
three components, depends upon which of them is made the driver and which
the driven. In our present arrangement the central wheel is in all cases the
driver, and the four several states of the gear are thus produced.
(1). For the lower speed (increased power being required) the internally
toothed wheel is held in a fixed position, and the stud disc is connected to the
driven wheel.
(2). When the high speed is required both the internally toothed wheel and
the stud disc are locked to and revolve with the central pinion and driven wheel.
(3). When it is desired that the motor (whether rotating or at rest) shall be
disconnected from the driven wheel both the internally toothed wheel and the
stud disc are set free from the other parts.
(1). When it is desired to reverse (the motor still continuing its forward
motion) the stud disc is held fast and the internally toothed wheel is clutched
to the driven wheel.
Figure 1 is a longitudinal section of one arrangement and Figures 2 to 14
are detached views of separate parts to half the scale of Figure 1. In these
views the lines on which the section Figure 1 is taken are marked 1. 1.
He has a
The central spindle S is fixed to the frame of the machine and the mechanism
is driven by the pair of gear wheels A fixed to the sleeve A¹ to which is also
fixed the contral pinion B. gearing with planet wheels 1 running on studs P
and supported by ring L (Figure 9) and carried by the stud disc C (Figure 4)
which runs loose on the sleeve A. The planet wheels P gear with the internally
toothed wheel 1) (Figure 10) formed with the sleeve D which runs loose on a
sleeve attached to the driven wheel or hub E (Figure 14). The sleeve E' is
loose on a sleeve H (Figure 5) permanently fixed to a sleeve H2.
deep flange or disc H (Figure 11). Loose on the outer end of His a grooved
ring K (Figure 6) capable of a sliding movement. K carries four bolts K by
means of which the disc H can be bolted to the hub E. At the back of the
internally toothed wheel 1) (Figure 10) are four long bosses D extending to a
ring L attached to the bosses by screws. The bosses are bored through their
whole extent to receive four bolts M. A portion of the bolt holes is of larger
diameter, and is cut away externally in a D shape in four equi-distant places to
receive coiled springs and a ring N (shown in side elevation and plan at
Figures 12 and 13). This ring is pierced with four tapped holes into which
the bolts M are securely fixed. "On the side of the ring next the internal wheel I
is constructed a double incline or cam N¹ (Figure 12) which when the shutter
bolt O is dropped into the space O' pushes back the ring N with the bolts M and
thus withdraws them from the disc H. When the cam N¹ has been pushed
back to its extreme point the shutter bolt O is forced by its spring into. a recess D
in the internal wheel D which is thereby held fast and prevented from
rotating, but leaves H free to rotate. H has another set of 4 holes to receive 4
bolts R which connect and disconnect the stud disc C with H. The bolts R are
carried by a ring T (shown in plan and side elevation at Figures 7 and S
armed with a double cam similar to N operated in the same way by the shutter

page_text: bolt 02. U (shown in end and side elevation at Figures 2 and 3) is a flanged
cover for the gear and is fixed to the frame of the machine.
This gear gives four different phases. As shown in Figure 1, the shutter bolt
This gear gives four different ph/yes. As shown in Figure 1, the shutter holt 0
having been released has fallen as far as the periphery of the stud disc C
pinions will act as intermediate wheels and wili rotate the internal wheel D in
a reverse direction, thus driving the hub E backwards, the power developed
being as 2 to 1.
When the shutter bolt 0 is raised, the bolts R, carried by the ring T, which
by the action of the cam on T have been withdrawn from H, thus permitting its
rotation, are forced back by their coiled springs into their holes in H. In this
state, the train of wheels is locked, and the gear rotates as one piece.
When the shutter bolt is released it drops on the flange of next the ring
When the shutter bolt is released it drops on the flange of D next the ring N
carrying the cam on which it operates and thus pushes back the ring N with
is thus fixed and the epicyclic train of wheels comes into operation, giving a
power of 3 to 1. When the shutter bolt is withdrawn the bolts M return to
their normal position in H and the gear is locked and drives as
When it is desired that the gear shall run free, without driving the hub, the
bolts K are withdrawn, and E is thus released from its connection with H.
Figure 15 is a longitudinal section of a modification and Figures 16 to 26 are
detached views of separate parts to half the scale of Figure 16. In these views
the lines on which the section Figure 15 is taken are marked 15-15..
In this case also the central spindle S is fixed to the frame of the machine
and the mechanism is driven by the pair of gear wheels A fixed to the sleeve A
carrying the central pinion B. gearing with the planet wheels P running on
studs carried by the stud dise C (Figure 19) loose on the sleeve A. The
planet wheels gear, with the internally toothed wheel 1) (Figure, 17) fixed to
a sleeve loose on the sleeve E attached to the driven wheel or
hub E. E is fixed to the sleeve H of the disc H (Figure 18). The disc has in
it four holes M² to receive four bolts M carried by T (Figure 16) and four holes R2
to receive four bolts R carried by the disc 0 (Figure 20). T is an annular
disc with a broad flange at its right hand extremity a flanged ring T forming
a groove in which is placed a screwed piece N (Figure 21) free to revolve therein.
Talso has on its inside circumference slots T fitting corresponding projections.
on the exterior of D), so that T and D) are always engaged, but so that T can be
moved sideways along D as hereafter described. D2 are slots on D. T is coned
on its outer circumference to correspond with the hollow cone in U¹. U is a
flanged ring held by U (Figure 25) which is firmly fixed to the frame of the
machine. is a flanged disc screwed to a flanged ring O' at its outer circum-
ferenes and forming a groove for the reception of the screwed piece N'. The
disc is cut in the same manner as T to correspond with a hollow cone in U
on the right hand side of the gear. The disc O carries 4 pins R which slide into
freely passing through holes in T and carrying 4 coiled springs which press
holes in 4 long bosses formed on the stud disc C. M¹ are 4 pins fixed in D
against T to keep it up to the face of D. When T is thrust into the cone
these springs are in compression. Similarly Rare 4 pin stewed into C and
passing through for keeping it, up to the face of 0 When O is
thrust into the conical space these springs are in compression.
will now describe the parts intended to pass the cone pieces T
and into their respective recesses when it is desired to fix either
one or the other. N (Figure 21) is a ring having 4 lugs which form a
portion of a screwed thread the intermediate portions of the thread being cut
away. These sloped lugs pass through slots in U which prevent N and N
from revolving and at their outer extremity they are received by the annular
nut K (Figures 23 and 24) capable of being moved through about a quarter of
a circle, which operates is constructed in an exactly similar way. It
Wo

page_text: will thus be seen that a movement of K traverses N and N¹ respectively but
to prevent their moving at the same time the thread in K is made parallel
towards its central portion K. The nut is cut with 4 threads throughout of
the required coarse pitch. The threads are cut away for about half their width
in the middle and a piece substituted which is shown in its developed form at
K (Figure 22). It will be seen that in this arrangement the whole of the
movements are performed with one hand lever. The gear shown gives 4
different phases. As sliown in Figure 15 it runs as one piece. When the lever
is brought over so as to operate the cone T the bolts M are withdrawn, the
internal wheel is held and the hub is driven from the stud dise the speed heing
reduced from 3 to 1. On the contrary when is fixed the bolts R are with-
drawn and the stud disc C is held, the reduction of speed is from 2 to, 1 with
a reversal in the direction in which, the hub is driven. This is for hacking
purposes. The free rotation of the gear in detachment from the hub is effected
by moving the lever sufficiently far to release H but not far enough to be held
by the coned recess; or the same result may be obtained on the other. side of
the gear by operating 0 in a similar fashion.
Figure 26 is a longitudinal section of a third modification and Figures 27 to
30 are detached views of separate parts to half the scale of Figure 26.
in this gear the axle L is driven, and the epicyclic movement employed dis-
penses with the internal wheel. B (Figure 30) is a straight lenticular shaped box
formed with long sleeves 1, and 1 and carrying 4 spindles C fixed to the box.
On each of these spindles rotate 4 pinions 1, 'D, D and D (Figures 27 and 28)
of 4 different diameters but all of them running as one piece. The mechanism
is driven by the cog wheel A secured to the end of the sleeve B. 13 rotates on
a sleeve Ni fixed to the axle L. N¹ is fixed to the gear wheel N which gears
with the pinion D. The gear wheel N and the pinion D are always in
operation. The other 3 pinions about to be described are thrown into action
separately as required. It will be seen that the action is that of an epicyclic
train in which a double pinion is rotated around 2 wheels one of which is fixed.
In our arrangement cach pinion has its appropriate gear wheel, which becomes
a fixed wheel by the operation of a brake with which it is connected, the other
pinions and their respective gear wheels rotating free until such time as their
appropriate brakes are brought in use. Our mode of effecting this is as follows.
Gearing with the pinion D is a gear wheel K which has a long sleeve K
rotating on the axle L and formed upon it is a brake drum K2 the periphery of
which is held by a brake or strap in the usual manner. Gearing with D is a
gear wheel H having a long sleeve H' on which is formed a brake drum H³.
The sleeve H rotates on K. Gearing with pinion D is a gear wheel E with a
long sleeve E' carrying a brake drum E. The sleeve E rotates on H. This
gear gives 4 different phases. When none of the brakes are fixed the gearing
is free and exerts no propelling power upon the axle L. Supposing, K to be
held fast by the brake K, N will be rotated by the pinions 13 and 1 at a
reduced speed in relation to A and will develop a power of about 4 to 1.
Supposing H to be held fast by the brake H, N will be rotated by the pinions D¹
and D3 at a reduced speed in relation to A, and will develop a power of 2 to 1.
Supposing the gear wheel E to be held fast by the brake E, N' will be rotated
but in an opposite direction by the pinions D and D at a reduced speed in
relation to A, and will develop a power of about 3 to 1. This
reversal takes place in consequence of the diameter of the gear wheel E,
being greater than that of N, and is intended to be used for driving the vehicle
backwards.
Having now particularly described and asertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
1. The combination with a constantly running motor of driving gear giving

page_text: two forward speeds and a reverse speed and which can be disconnected sub-
stantially as described.
2. The combination of a central pinion, an internally toothed wheel and
intermediate wheels mounted on a stud disc with means for holding stationary
either the internally toothed wheel or the stud disc and means for connecting the
stud disc and the internally toothed whel either to the driving or the driven shaft
substantially as described."
3. Driving gear substantially as described and shown at Figure 1.
4. Driving gear substantially as described and shown at Figure 15.
5. Driving gear substantially as described and shown at Figure 26.
Dated this 4th day of September 1897.
WM. THOS. SHAW.
I. W. BOOTHROYD.
A. SYDENHAM.
WM. THOS. SHAW.
I. W. BOOTHROYD.
A. SYDENHAM.