Improvements in Driving Chains for Cycle and other Wheels.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Driving Chains for Cycle and other Wheels.
I, JAMES CHARLES GREEN, of 25, Saint James Road, Southsea, Portsmouth,
in the County of Hampshire, Engineer and Cycle Manufacturer, do hereby declare
the nature of this invention to be as follows:-
-
It consists of flat pieces of sheet steel bent at right angles forming two sides
and a top for a channel to rivet block or roller at inside each end so forming a
channel for chain wheel teeth to run through the links so making a dust proof
chain.
Improvements in Driving Chains for Cycle and other Wheels.
1, JAMES CHARLES GREEN, of 25, Saint James Road, Southsea, Portsmouth,
in Hampshire, Engineer and Cycle Manufacturer, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be parti
cularly described and ascertained in and by the following statement:
-
My invention relates to improvements in driving chains for cycle and other
wheels, and has for its object to so construct the links thereof that they may
themselves form covers or shields for their own bearings in order to exclude dirt
and dust therefrom, and thereby obviate the necessity for the use of gear cases.
In order that the features of the improvements constituting my invention may
be more clearly understood I have hereunto appended a sheet of drawings of
which,
Fig. 1 is an enlarged perspective view (relatively to Figs. 5 and 6) of one of
the said links as I prefer to form them, while Figs. 2, 3, and 4 are perspective
views of the bolt, bush, and roller or sleeve respectively of same.
Fig. 5 is a plan or top view of a portion of a complete chain, while Fig. 6
illustrates its application and use in connection with an ordinary sprocket or
toothed driving wheel, as used upon cycles and like machines.
I carry my invention into effect by forming a chain, each link of which is con-
structed of steel plate, so bent laterally as to form a channel which may be of
rectangular or other shape in cross section, and essentially consists of two
sides A and B and a top or cover C. In each of the sides (and at a suitable
distance from the ends thereof according to the distance between the teeth of the
sprocket or toothed wheel with which it is to engage) I provide a pair of holes,
those D D in B facing those E E' in A, the end of the link in which D' and E¹
037

page_text: occur, being narrowed in order that it may take into the wider end of its neigh-
bour. The holes D' and E' are of larger diameter than E and D and in the former
is placed a metal bush F (Fg. 3) of a length equal to the width of C, the internal
diameter of the said bush being equal to the diameter of the holes D and E.
One end of the said bush is provided with two or more extensions or projections G,
adapted to engage with like shaped gaps H in the edges of the holes D¹ or E
as shewn in Fig. 1, the said gaps and projections being provided in order, that
when the bush in position in D and E it may not rotate therein.
placing the said bush in position a roller or sleeve J (Fig. 4) is placed between
the sides A and B, so that in placing the bush in position it may pass there-
through (as indicated by dotted lines in Fig. 2) the said sleeve being adapted to
rotate thereon for the purpose of reducing friction in its connection with and
disconnection from the teeth of the sprocket wheel, upon which the chain is to
work.
Before
The bush and sleeve being placed in position as stated within the narrow end
of a link, the said narrow end would then be placed within the wider end of
another link, and be freely connected thereto by a bolt K, (Fig. 2) this being
passed through the holes 1 and E of the second link and the bush F of the first
link, the head of the said bolt fitting into the splayed edge of D) or E, say D,
its opposite or small end being then burred over upon the hole E, or provided
with a screw, fitted into the end thereof, so that the head of the said screw may
act as an equivalent for the said burr, the latter arrangement being most suitable
in fitting together the first and last links of the chain.
A chain so constructed would be fitted upon the wheels of a machine in such
a way, that the narrow ends of the links take the lead, when the said wheels are
rotated, as indicated by the arrows in Figs. 5 and 6, the back end of the top C
of one link thus serving to cover the front end of the link beneath it, and so
keep out dust and dirt, while the teeth L of the wheel M would engage with and
between the rollers or sleeves J as shewn in Fig. 6.
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:-
-
1st. The improved driving chain for cycle and like wheels substantially as and
for the purposes herein described and shewn.
2nd. The improved driving chain for cycle and like wheels in which the links
are composed of bent plates such as A B C, connected to each other by the means
of bolts K in such a manner, that each link covers and protects from dust and
weather the means of connection between itself and the following link,. sub-
stantially as herein described and shewn.
3rd. The improved driving chain for cycle and like wheels, the links of which
are each composed of sides A and B and cover C, and connected with each other
by the means of bolts K, each passing through holes 1) and E of one link, and a
bush carrying a sleeve J and engaging with holes 1) and E of the next link,
connected, combined and operating substantially as herein described and shewn.
Dated this 30th day of April 1900
GEO. THOS. HYDE,
1, Broad Street Buildings, Liverpool Street, London, E.C.,
Agent for the Applicant.