Improved Means of Transmitting Power through Belts, Ropes, Chains, and Wheel Gearing.
Year: 1895

page_text: Date of Application, 13th Nov., 1895
Complete Specification Left, 12th Sept., 1896-Accepted, 17th Oct., 1896
PROVISIONAL SPECIFICATION.
Improved Means of Transmitting Power through Belts, Ropes,
Chains, and Wheel Gearing.
We GEORGE CHARLES TOPP and NEVILLE SKOTTOWE PARKER both of
Brandon Lodge Wood Green, London N. Civil Engineers, do hereby declare the
nature of this invention to be as follows:
This invention has for its object certain improvements in the gearing used to
transmit power by chains belting and wheels whereby an economy of power is
obtained and it is applicable to machines driven by human steam or other power.
To apply our invention to a cycle we use a chain and pedal chain wheel of the
ordinary type but the pedal chain wheel may be smaller. In one piece with the
hub of the driving wheel is a tooth wheel. Round this tooth wheel is a larger
chain ring with teeth on its inner face to engage with the smaller tooth wheel;
and with projections on its outer face to take the chain. The chain ring is made
with a collar on each side, one of which may be enclosed in a casing: which casing
is fixed to the spindle, and framework of the machine. Ball bearings being used
in casing. Friction wheels may be used to keep the chain ring in position,
i.e. eccentric to the centre of the spindle. In action the chain is driven from the pedal
chain wheel on to the chain ring; which latter by means of the inside teeth turns
the smaller tooth wheel on the hub of the driving wheel. The chain ring is by
means of the friction wheel and, or, the collar and casing, always kept in an
eccentric position, as regards the spindle and an increase of power is thereby
gained.
Dated thin 10th dow of November 1905
GEORGE CHARLES TOPP.
NEVILLE SKOTTOWE PARKER.
Improved Means of Transmitting Power through Belts, Ropes,
Chains, and Wheel Gearing.
We GEORGE CHARLES TOPP and NEVILLE SKOTTOWE PARKER both of
Brandon Lodge Wood Green London N. Civil Engineers 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 has for object certain improvements in the gearing used to
transmit power by chains belting and wheels whereby an economy of power is
obtained and it is applicable to machines driven by human steam or other power.
To apply our invention to a cycle we use a chain & pedal chain wheel of the
ordinary type, but the pedal chain wheel may be smaller. In one piece with the
hub of the driving wheel is a tooth wheel. Round this tooth wheel is a larger
chain ring with teeth on its inner face to engage the smaller tooth wheel and with
projections on its outer face to take the chain. The chain ring is made with a
collar on each side one of which may be enclosed in a casing. Which casing is

page_text: fixed to the spindle and framework of machine; ball bearings being used in casing.
Friction wheels may be used to keep the chain ring in position i.e. eccentric to the
centre of the spindle. In action the chain is driven from the pedal chain wheel on
to the chain ring, which latter by means of the inside teeth turns the smaller
tooth wheel on the hub of the driving wheel. The chain ring is by means of the
friction wheels and or the collar and casing always kept in an eccentric position as
regards the spindle and an increase of power is thereby gained.
Fig. 1 is an elevation of a cycle fitted with the improved gear.
Fig. 2 is a sectional view of the rollers shown in Fig. 1.
Fig. 3. is a sectional view of the ring shewn in Fig. 1.
Fig. 4 is a sectional view of the hub:
In Figure 1. A is a pedal crank wheel with sprockets B. which by means of a
chain turns a ring C which has teeth D on its inner face and sprockets E on its outer
face. F. and F are rollers. G is the frame supporting them. H is a cog wheel
on the hub I. J is the spindle of driving wheel.
Fig. 2 is a seation of rollers F. & F.
Fig. 3 is a section of ring C at dotted line K.
Fig. 4 is a section of the hub I & wheel H.
This invention is not limited to cycle driving but is applicable for all kinds
of mechanism in or to which such a combination of gear can be found useful.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what wo
claim is
1. An improved method of transmitting power consisting of or involved in the
use of a ring held in an eccentric position round a cog wheel which it operates by
means of inside teeth..
'
2. The combination and arrangement of mechanical parts all together forming.
an improved driving gear substantially as described and illustrated in the drawings
for the purpose or purposes set forth.
Dated this 12th day of September 1896.