Improvements connected with the Chain Gear of Cycles, Motor Cars, and like Vehicles.
Year: 1898

page_text: Date of Application, 12th Oct., 1898
Complete Specification Left, 8th July, 1899-Accepted, 12th Aug., 1899
PROVISIONAL SPECIFICATION.
Improvements connected with the Chain Gear of Cycles, Motor Cars,
and like Vehicles.
We, WILLIAM ALEXANDER, of 96, Saltmarket, Gallowgate, Glasgow, Mechanic,
and ANDREW HENDERSON, of 6, Craignestock Place, Glasgow, Mechanic, do
bereby declare the nature of this invention to be as follows:-
This invention relates to the chain gear for cycles, motor cars, and like
vehicles and it has for its object, by the use of revoluble or partially revoluble
carriers, to lessen or reduce the friction generated when the chain is running
over the sprocket wheels.
In carrying out our invention we make the chain driving wheel with a boss
which is provided, at each side, with ball bearings. Mounted; movably upon
these bearings are two carriers which are arranged one at each side of the chain
wheel and whose peripheries correspond with the periphery of the chain wheel.
These carriers are so arranged relatively with the chain wheel that their
peripheries, although separate from, virtually form a part of the rim of the
chain wheel. The chain, when travelling round the chain wheel, bears with its
links upon the carriers and as the latter are movable upon their bearings a roller
action takes place between the links of the chain and the carriers thereby
reducing friction, and, further, as the rollers of the links of the chain alone bear
upon the chain wheel or rather the teeth thereof these is less liability of kinking
or back-lash.
The ball bearings for the carriers are preferably made adjustable in the usual
manner.
The carriers may each be made in two or more parts.
The sprocket pinion on the hub of the driving wheel of the vehicle is or may
be made in the same manner with revoluble or partially revoluble carriers
running or moving upon ball bearings arranged at the outside of the hub and
at each side of the pinion wheel.
If desired instead of using ball bearings roller bearings may be employed.
Dated this 11th day of October 1898.
Improvements connected with the Chain Gear of Cycles, Motor Cars,
and like Vehicles.
We, WILLIAM ALEXANDER, of 96, Saltmarket, Gallowgate, Glasgow, Mechanic,
and ANDREW HENDERSON, of 6, Craignestock Place, Glasgow, Mechanic, do
D 17

page_text: 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 follow-
ing statement:-
This invention relates to the chain gear of cycles, motor cars, and like
vehicles and it has for its object, by the use of revoluble or partly revoluble
carriers, to lessen or reduce the friction generated when the chain is running over
the sprocket wheels.
In order that our said invention may be properly understood—we have hereunto
appended an explanatory sheet of drawings, whereon,
Fig. 1 is a side elevation, Fig. 2 an end elevation and Fig. 3 a cross section,
on the line xx Fig. 1, of a chain driving wheel.
In carrying out our invention we make the chain driving wheel a with a boss b
which is provided, at each side, with ball bearings c, c. Mounted movably upon
these bearings are two carriers d, d', which are arranged one at each side of
the chain wheel and whose peripheries correspond with the periphery of the chain
wheel. These carriers are so arranged relatively with the chain wheel that their
peripheries although separate from virtually from a part of the rim of the chain
wheel. The chain, when travelling round the chain wheel, bears with its links
upon the rims do of the carriers and as the latter are movable upon their ball
bearings a roller action takes place between the links of the chain and the
carriers thereby reducing friction, and, further, as the rollers of the links of the
chain alone bear upon the chain wheel a, or rather the teeth thereof, there is
less liability of kinking or back-lash.
The ball bearings for the carriers are preferably made adjustable and in the
usual manner.
The carriers may each be made in two or more parts securely fitted together.
The sprocket pinion on the hub of the driving wheel of the vehicle is or may
be made in the same manner with revoluble or partly revoluble carriers running
or moving upon ball bearings arranged at the outside of the hub and at each
side of the pinion wheel.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we consider novel and desire to claim is;-
Chain wheels made with movable carriers, substantially as and for the purpose
set forth.
forth.
Dated this 7th day of July 1899.
H. D. FITZPATRICK,
100, Wellington Street, Glasgow, Agent.