IMPROVEMENTS IN TRICYCLES AND SUCH LIKE VEHICLES
Year: 1884

page_text: PROVISIONAL DIECIFICATION.
We WILLIAM THOMAS SHAW of Adelaide Road Surbiton in the County of-.
Surrey Manufacturer and WILLIAM SYDENHAM of Great Eastern Street London
Engineer do hereby declare the nature of our Invention for "IMPROVEMENTS IN
TRICYCLES AND SUCH LIKE VEHICLES" to be as
follows:
According to our Invention we combine together change speed gear and balance
gear so that they may be enclosed together in the same box or casing and placed
together on the upper or driving axle.
This we effect by constructing the change speed gear in such manner that the stud
plate which carries the intermediate pinions of this gear.comes at one end of the box
or casing in which this gearing is enclosed and by, in addition, causing the outer side.
or flange of the stud plate to carry the studs of the crown wheels or pinions of the
balance gear. The loose pulley of the balance gear is thus substituted by the
pulley of the change speed gear the last named pulley being connected up with
the balance gear through the medium of the stud plate as above explained.
+
The balance gear may be of the kind described in the Specification of a Patent
granted to James Starley N° 3388 in the year 1877 or such as is described in the
Specification of a Patent granted to Amos Kirby No 5082 in the year 1880, or with
balance gear similar to that described in the latter Specification but in which the
connection between the smaller end of the double pinion and its appropriate spur
wheel is effected by an intermediate wheel instead of by an endless chain or other
forms of balance gear may be adopted. The change speed gear we prefer to form
in such manner that the intermediate wheels carried by the studs of the stud plate
gear into an internal ring of teeth on the chain wheel as well as into a spur wheel
which can turn around the axle and which is fast with a flanged disc wheel on the
opposite side of the chain wheel. The disc wheel carries a clutch which can be
slidden in a direction parallel with the axle and made either to engage with recesses
in the chain wheel or with recesses in a fixed plate, which forms the end of the box
or casing by which this gear is enclosed but other forms of change speed might be
adopted.
In the manner above described the balance gear may be retained in the position
which it ordinarily, occupies next or near to the road wheel whilst the ordinary
chain pulley is substituted by a stud plate connected by pinions with the chain
pulley which forms the driver of the change speed gear. This pulley of the change

page_text: speed gear is geared by an endless chain with the chain pulley on the crank or
driving axle. This latter chain pulley may either be fast upon the crank or driving
axle or it may form part of a second change speed gear carried by the axle. In
this latter case we are enabled to obtain three or if desired four speeds on the same
machine-making use for this purpose of one single driving chain only, to gear the
change speed gear on the driving axle with the chain speed gear on the upper or
main axle.
Dated this 24th day of January 1884.
We WILLIAM THOMAS SHAW of Adelaide Road Surbiton in the County of Surrey
Manufacturer and WILLIAM SYDENHAM of Great Eastern Street London Engineer,
do hereby declare the nature of our Invention for "IMPROVEMENTS IN TRICYCLES
AND SUCH LIKE VEHICLES" and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement :—
According to our Invention we combine together change speed gear and balance
gear so that they may be enclosed together in the same box or casing and placed
together on the upper or driving axle.
This we effect by constructing the change speed gear in such manner that the
stud plate which carries the intermediate pinions of this gear comes at one end of
the box or casing in which this gearing is enclosed and by in addition causing the
outer side or flange of the said stud plate to carry the studs of the crown wheels or
pinions of the balance gear. The loose pulley of the balance gear is thus
substituted by the pulley of the change speed gear the last named pulley being
connected up with the balance gear through the medium of the stud plate as above
explained:
The balance gear may be of the kind described in the Specification of a Patent
granted to James Starley N° 3388 in the year 1877 or such as is described in the
Specification of a Patent granted to Amos Kirby N° 5082 in the year 1880 or with
balance gear similar to that described in the latter Specification but in which the
connection between the smaller end of the double pinion and its appropriate
spur wheel is effected by an intermediate wheel instead of by an endless
chain or other forms of balance gear may be adopted. The change speed
gear we prefer to form in such manner that the intermediate wheels carried
by the studs of the stud plate gear into an internal ring of teeth on the
chain wheel as well as into a spur wheel which can turn around the axle and
which is fast with a flanged disc wheel on the opposite side of the chain wheel.
The disc wheel carries a clutch which can be slidden in a direction parallel with
the axle and made either to engage with recesses in the chain wheel or with
recesses in a fixed plate which forms the end of the box or casing by which this
gear is enclosed but other forms of change speed gear might be adopted.
In the manner above described the balance gear may be retained in the position
which it ordinarily occupies next or near to the road wheel whilst the ordinary
chain pulley is substituted by a stud. plate connected by pinions with the chain.

page_text: pulley which forns the driver of the change speed gear. This pulley of the change.
speed gear is geared by an endless chain with the chain pulley on the crank or
driving axle. This latter cbain pulley may either be fast upon the crank or
driving axle, or it may form part of a second change speed gear carried by the axle.
In this latter case we are enabled to obtain three or if desired four speeds on the
same machine-making use for this purpose of one single driving chain only, to
gear the change speed gear on the driving axle with the change speed gear on the
upper or main axle.
In the Drawings hereunto annexed we have shown various forms of balance gear
combined with change speed gear as above described.
Figure 1 shows a longitudinal section Figure 2 an end view and Figure 3 a front
view of one form of combined change speed gear and balance gear. Figures 4, 5, 6
and 7 shew separate views of some of the parts of the change speed gear.
Figures 4 and 5 shew a face view and an edge view of the sliding clutch. Figure 6
shews a section of the disc wheel within which this clutch can be slidden to and fro
Jengthwise of the axle and Figure 7 shews a face view of the fixed plate of the
clutch with sunken teeth and of the fork carried by it which serves to shift the
sliding clutch piece to and fro. Figure 8 shows a face view of the balance gear
with the outer toothed wheel in section-this arrangement of balance gear is that
known as Amos Kirby's.
.
In these Figures A is the axle on one end of which is fixed one of the driving
road wheels whilst loose on the other is the second driving road wheel B or a sleeve
to which this wheel is secured-C is the stud plate which carries the studs upon
which the intermediate pinions of the change speed gear revolve and also the studs
upon which the pinions of the balance gear revolve. This stud plate can turn
freely around the axle. D is the chain or driving wheel of the change speed gear
having fast with it the internal toothed wheel E-these also can turn freely around
the axle F is the flanged disc wheel within which is carried the sliding clutch G.
H is a toothed wheel fast on the tubular axis of the wheel F-these also turn
freely independently of the axle-The sliding clutch is formed of a short sleeve
which can be slidden to and fro along the exterior of the tubular axis of the
wheels F and H. Projecting outwards from the sleeve is a disc having two
segmental sets of teeth projecting from its two opposite sides as shewn in Figure 1
and in Figures 4 and 5. One set of clutch teeth pass through slots formed in the
disc of the disc wheel F and can be made to engage with the teeth which are sunk
in the chain or driving wheel. The other set of clutch teeth can be made to
engage with a ring of clutch teeth formed on the inside of the fixed plate I which
forms the end plate of the apparatus. J. J. are the pinions carried by studs on.
the stud plate and which gear not only with the teeth of the internal toothed
wheel E but also gear with the toothed wheel H. K is a fork carried by a short
spindle which is mounted on the inside of the plate I-pins at the ends of the'
arms of this fork enter a groove formed around the circumference of the clutch
sleeve so that the clutch may be moved endwise by giving a short turn to the
spindle.
On the spindle is an arm with a pin at its end which enters an inclined alot in a
lever L-so that a partial turn may be given to the spindle by moving the lever.
The lever can be locked by a spring catch in one or other of these positions. In
one end position the clutch will be locked into the clutch teeth on the fixed
plate I-and the stud plate will be driven at a slower speed than the driving
wheel. In the other end position the clutch will be locked into the clutch teeth
on the driving wheel and the stud plate will be driven at the same speed as the
driving wheel. In the central position the sliding clutch will not be engaged
either with the fixed clutch teeth or with the clutch teeth on the driving wheel
and both of the road wheels can then revolve freely without turning the chain
or driving wheel and so without turning the crank or pedal axis.
M Mare the double pinions of the balance gear they can turn around studs
which project from the opposite side of the stud plate to that from which the studs

page_text: which carry the pinions J project. The larger pinion M of each pair of pinions M M
gears with an internal toothed wheel N which is fast with the sleeve or road
wheel B the smaller pinion gears with a toothed wheel O which is keyed on to the
axle A. Thus the stud plate is driven through the change speed gear and the stud
plate by the pinions M M¹ drives both of the road wheels either at the same speed 5
or at different speeds as will be readily understood.
At Figures 9 and 10 we have shown the same construction of change speed gear
combined with balance gear of the kind described in the Specification of a Patent
granted to Amos Kirby N° 5082 in the year 1880. In this case the larger pinion M
of the double pinion M M¹ gears with a toothed wheel fixed to the road wheel B 1
whilst the smaller pinion is geared by an endless chain with a pinion which is
geared on to the axle.
At Figures 11 and 12 we have shown the same construction of change speed
gear combined with balance gear in which the larger pinion M gears with a toothed
wheel fixed to the road wheel B as in the construction shown at Figures 9 and 10 1
but in which the smaller pinion M₁ is geared. by an intermediate pinion M² with
the toothed wheel which is fast on the axle. Figures 13 and 14 show the change
speed gear combined with balance, gear made according to Starley's Patent in
which bevil pinions carried by the stud plate are each made to gear with two bevil
wheels one of which is fast with the road wheel B and the other with the axle.
'
As before stated the chain or driving wheel D may be driven by an endless chain
or otherwise from a toothed wheel on the crank or pedal axis of the tricycle or
other such like vehicle or from a toothed wheel forming part of a second change
speed gear fixed upon this axis.
Having now particularly described and ascertained the nature of our said 2
Invention and in what manner the same is to be performed we declare that
we do not confine ourselves to the precise construction of the change speed gear
or to the special forms of balance gear which are shown in the Drawings but what
we claim is:-
First.—The combination of change speed gear with balance gear placed along- 3
side of it on the axle of a tricycle or such like vehicle so that the balance gear
is driven through the change speed gear substantially as herein described.
Second. The construction of combined change speed gear and balance gear with
the stud plate which carries on one side of it the intermediate pinions of the
change speed gear carrying on its opposite side the pinions of the balance gear 3
substantially as herein described.
Third. The combinations of change speed gear and balance gear substantially as
herein before described and illustrated in the Drawings annexed.
Dated this 5th day of June 1884.