Improvements relating to Driving Mechanism for Cycles.
Year: 1899

page_text: Date of Application, 26th Sept., 1899-Accepted, 28th Oct., 1899
COMPLETE SPECIFICATION.
Improvements relating to Driving Mechanism for Cycles.
I, EDWARD WILLIAMS, of 48, Benson Road, in the City of Birmingham,
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:-
This invention consists of improvements relating to cycles having a clutch
connection between the rear or driving road wheel and the chain wheel mounted
thereon, my object being to so construct and arrange the parts of such clutch
connections as to prevent displacement when in service and to ensure certainty
of action.
In order that my invention may be the more readily understood I append
hereunto a sheet of explanatory drawings to be hereinafter referred to.-
Figure 1 is a side elevation (half in section), and Figure 2 an end elevation
(half in section), of my improved free wheel clutch device.
Figure 3 is an end clevation of the central ring or annular body of the clutch.
Figure 4 is an elevation and Figure a plan of one of the roller guard
pieces.
Figure 6 is a side elevation and Figure 7 an end elevation of one of the
springs.
The same reference letters in the different views indicate the same parts.
The chain wheel or toothed wheel A is mounted loosely upon the periphery of
the clutch ring B which is screwed or otherwise secured upon the hub of the
rear or driving road wheel of the machine. Around the said part B I form a
number of gaps or pockets as C the depth of the pockets being greater at one
of their ends than at the other as shown. In each gap or pocket I insert a
roller as D of a diameter about equal to the mean depth of the socket, and for
each roller I provide a guard piece as E and a spring F which acts upon the
guard piece to press the roller towards the shallow or small end of the pocket.
The guard pieces E, one of which is shown at Figures 4 and 5, have a tail or
extension as e which is made to enter and to be free to slide in the central
peripheral groove of the annular ring or clutch body B.
The springs F one of which is shown separately at Figures 6 and 7, are made
of an oval form as illustrated in order that they shall be effectually guarded by
the walls of the spaces in which they are contained and so prevented from dis-
placement.
Lateral displacement of the free chain wheel A and also of the rollers D and
springs E is prevented by the side plates G G¹ secured by screws as H to the clutch
ring or body B.
With the chain or gear wheel A rotating in the direction indicated by the arrow,
the clutch will securely connect it with the ring 13 fixed on the road wheel hub
and the whole will move together as one piece. But if the wheel A is retarded
or prevented from rotation by a back-pedalling action or otherwise whilst the
machine is in motion, the ring B will tend to overtake the wheel A and thus
ג'7 %
017

page_text: by a slight advance of the larger ends of the pockets C towards the rollers D
the grip of the latter will be released and the wheel A disconnected from B.
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:-
-
1. In clutch connections between a chain or gear wheel and the driving road
wheel of a cycle, the combination with rolling parts such as I) of guards E having
tail pieces or extensions sliding within the peripheral groove of the clutch
body B, and oval springs as F, substantially as and for the purposes described
and as illustrated.
2. The improved free wheel clutch device for cycles comprised by the general
construction and arrangement of parts substantially in the manner described
and as illustrated.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, & 25, Cross Street, Manchester,
Agents for the Applicant.