Year: 1888

page_text: I, JAMES HARRISON CARTER of The Cottage, Hurst Road, Bexley in the County of
Kent, 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 :-
The subject matter of this application is designed to work or operate in conjunction
with improvements in Bicycles, Tricycles, and other velocipedes for which I have
obtained British Letters Patent No. 9283 of A.D. 1886. and I hereby claim further
improvements.
In order to prevent any leakage of oil or other lubricant used in gear cases I,
firstly, apply discs on each side of the chain or other wheel or wheels A as illustrated
in Fig. 1; the action of which is as follows.
Any oil or lubricant which may accumulate between the wheel and discs would have
to surmount such discs B. B before it could escape through the holes of the gear
case.
C is a piece of felt or other suitable material which will suck up the oil or other
lubricant appearing on the periphery of the discs B. B. These discs might either be
applied in conjunction with the wiper C or by themselves.
It might also be modified as illustrated in Fig. 2 by the discs B B being shaped
with inverted troughs round the circumference which fit over circular troughs D D
fixed inside the gear case round the spindle.
Secondly. Fig. 3 illustrates the second mode of preventing leakage. Two pieces of
wire or other material of suitable section marked B. B are placed on the spindle or
boss, one on either side of the wheel A. The pieces B. B. are held loose on the
spindle or boss so as to allow the latter to revolve freely; and to prevent the
pieces B B. from moving sideways I keep them in their position by grooves in
the spindle or boss, or other suitable manner.
The oil or lubricant which might accumulate between the wheel A and the
pieces B B will fill up the margin in the groove left between the spindle or boss
and continually run down the straight end of B. B. The pieces B. B. may be loose,
or fixed to the gear casing; it may also be shaped & formed in any other suitable
manner so as to convey the oil away from the spindle.

page_text: Thirdly. As illustrated by Fig. 4 I prevent any oil which may accumulate on the
spindle from leaking through the hole in the casing in conveying it towards the
wheel A by cutting a right and left handed thread in the spindle or else by affixing
wires in the shape of Archimedean screws which will convey the oil away from the
apertures.
Fourthly. I prevent leakage by fixing spirals marked B. B Fig. 5, one on each
side of the wheel A; these spirals have to be fixed in such a way as to convey the oil
from the spindle along its volutes towards the periphery where the wiper C takes off
the oil in a similar way as described in the first case. This spiral need not necessarily
be of wire but may also be stamped in discs or otherwise arranged so as to convey
the lubricant to the periphery.
As it is desirable to keep the gear case as narrow as possible this might cause the
chain when slack or out of the perpendicular to touch the case which I prevent by
placing strips of leather or other suitable material in such place or places wherever
the chain is likely to touch.
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
(i) preventing any leakage of oil from the gear cases of bicycles, tricycles, and
other velocipedes principally as illustrated and described.
(ii) the use of the different modes to prevent leakage of oil on bicycles, tricycles
and other velocipedes either by themselves or in combination substantially as
described.
(iii) preventing the chain when slack from touching the case substantially in the
manner herein before described.
Dated the 22nd day of June 1888.
JAMES HARRISON CARTER,
82, Mark Lane, London, E.C.