Improvements in or relating to Oyole Chain Wheels.
Year: 1895

page_text: Date of Application, 1st Mar., 1895
Complete Specification Left, 22nd June, 1895-Accepted, 27th July, 1895
PROVISIONAL SPECIFICATION.
Improvements in or relating to Oyole Chain Wheels.
I, EDWARD WILLIAMS of 2 Newton Place, Factory Road, Soho, in the City
of Birmingham, Machinist, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in cycle chain wheels my object being to
so construct and arrange the attachment between the chain wheel and the crank
arm or axle as to permit of lateral adjustment and to enable the wheel to be
readily attached or detached as required."
In carrying my invention into effect I stamp or otherwise form the chain wheel
in any ordinary manner making it either of the straight track pattern with the arms
central with the wheel teeth, or of the dished, recessed, or other required type.
The eye of the boss is bored out and has a screw thread cut or formed within it
to correspond with the thread cut upon the exterior of the attachment bush or
coupling piece. 1 preferably form my attachment bush in the one piece or stamping
with the crank arin, boring out the central portion to admit the crank axle and to
form a chamber large enough to go on the bracket for the reception of the cone
& cup. Through the periphery of the bush 1 cut a slot or form an aperture, and
insert therein a tapered or other nut to receive the screw stud or pin fitted to the
chain wheel boss, when brought into the required position. Such screw stud and
nut or other suitable fasteuing securely locks the wheel to the bush preventing
independent rotation of either part.
The screw thread upon the periphery of the bush or coupling piece and within
the eye of the chain wheel boss is of a fine pitch, in order that slight lateral
adjustment of the wheel may be effected by releasing the locking or clamping
connection, and giving the wheel one or complete revolutions in either direction as
may be required. When adjusted to the required lateral position the wheel is again
clamped or looked to the boss or coupling piece. In the same manner a wheel may
be readily reversed or removed and replaced when desired. When so reversed it
may perform the function either of a straight track chain wheel or a dished pattern
chain wheel.
I provide a space between the inner side of the crank arm and the outer face
of the chain wheel for enabling a gear case to be conveniently attached if
required.
Although I preferably form my screw bush or coupling piece in one piece with
the crank arm, 1 sometimes make it as a separate piece which is keyed or other-
wise attached to the axle, and I make other modifications to suit varying
requirements without departing from the essential feature of my invention.
Dated this 28th day of February 1895.
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.
4.

page_text: Improvements in or relating to Cycle Chain Wheels.
I, EDWARD WILLIAMS, of 2 Newton Place, Factory Road, Soho, in the City
of Birmingham, Machinist, 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 rulates to improvements in cycle chain wheels my object being
to construct and arrange the attachment between the chain wheel and the crank
arm or axle as to permit of lateral adjustment and to enable the wheel to be
readily attached or detached as required.
In the accompanying sheet of explanatory drawings to be hereinafter
referred to ;-
Figure 1 is a side elevation representing my improved method of connecting the
chain wheel with the crank of a cycle, and Figure 2 is an eud elevation of the
same with part in section.
Figure 3 is a part sectional end elevation representing the chain wheel reversed
to form what is known as a straight track chain wheel.
Figures 4 and 5 are enlarged side elevations representing two methods of
expanding the attachment bush.
The same reference letters in the different views indicate the same parts.
In carrying my invention into effect I stamp or otherwise form the chain
wheel A to the required pattern in any ordinary manner. The eye of the boss A¹
has a screw thrend cut or formed within it to correspond with the throad cut upon
the exterior of the attachment bush or coupling piece B. I preferably form the
attachment bush in the one piece or stamping with the crank arm B', boring out
the central portion to admit the crank axle and to form a chamber or recess large
enough to fit over the bracket and for the reception of the ordinary cone and cup.
Through the periphery of the bush B I cut a slot or form an aperture such as C,
and insert therein a tapered nut D to receive the end of the screw or bolt E
projecting through the bush. On turning the screw or bolt E in the required
direction, the tapered or wedge shaped nut D is forced into the upper or narrower
part of the slot C for the purpose of expanding the split bush B tightly against
the interior surface or periphery of the chain wheel hub or boss A' and thus
securely clamping the two parts together. The parts are released by turning the
screw or bolt E in the opposite direction. Instead of a screw or bolt such as E
with a tapered or wedge shaped nut D, I sometimes employ a bolt with a wedge
shaped head such as F, Figure 4, in conjunction with nuts on the outer end of
the screw or bolt, and I also employ a screw stud such as G, Figure 6, passing
through a screwed hole in the hub or boss of the chain wheel and having a tapered
point for entering within the conical slot, thus dispensing with the use of a nut
or nuts.
The screw thread upon the periphery of the bush or coupling piece B and
within the eye of the chain wheel boss A' is of a fine pitch, in order that slight
lateral adjustment of the wheel may be effected by releasing the expanding and
clamping connections, and giving the wheel one or more complete revolutions in
either direction as may be required. When adjusted to the required lateral
position the wheel is again secured to the boss or coupling piece. In the same
manner the chain wheel may be readily reversed, or removed aud replaced by a
new wheel.
To permit of a finer degree of adjustment I sometimes form two or more holes
in different positions around the wheel boss for receiving the expanding and
clamping screw or bolt. The wheel may be then adjusted within a less distance
than the pitch of the screw thread.

page_text: By reversing the chain wheel from the position shown at Figure 2 to the position.
shown at Figure 3, I convert it from a dished pattern wheel into what is known
as a straight track chain wheel. With the dished pattern wheel, as at Figure 2
I provide a space H between the crank and the chain wheel enabling a gear case
to be conveniently attached when required.
Instead of forming the screwed attachment bush B in oue piece with the
crank B, I sometimes make it as a separate piece and key or otherwise rigidly
secure the same to the axle. I also make other detail modifications to suit
varying requirements without departing from the essential features of my
invention.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is ;-
1. The improved method of connecting a chain wheel, with the crank or crank
axle of a cycle or like vebicle by means of a screwed and expansible bush or
coupling connection substantially as herein described.
2. In cycles and like vehicles, the use of a screwed bush or coupling connection,
having a slot or aporture cut or formed through its periphery, substantially as
and for the purposes hereinbefore described and as illustrated in the accompanying
drawings.
3. In cycles and like vehicles, the improved general construction and arrangement
of the driving chain wheel and crank or crank-axle attachments substantially as.
and for the purposes herein described.
Dated 1
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.