Improvements in Driving Bands and Wheels for Velocipedes and the like.
Year: 1897

page_text: Date of Application, 16th Oct., 1897-Accepted, 11th Dec.,
1897
Improvements in Driving Bands and Wheels for Velocipedes
and the like.
I, HENRY BETTLEY of, Houghton Hall Tarporley, Cheshire. 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:-
My invention relates to improvements in bands and driving or gear wheels more
particularly intended for use in connection with velocipedes, but which may be
employed for other purposes for which it is suitable, the object being to provide a
chain or band combining great strength with lightness and durability and to provide
suitably constructed gear or driving wheels to enable such a chain or band to be
employed. The further advantages of this driving mechanism are, that it is
impossible for the band or chain to slip off, that owing to a double pulling
arrangement the stress upon the individual teeth is greatly reduced, while as no thick
links or rollers are employed it is considerably lighter than the ordinary chain and is
further not so noisy in its running or working.
In order that my invention may be fully understood I will now proceed to
describe same with reference to the accompanying drawings in which Fig. 1 is a
plan of the chain or band employed, Fig. 2 being a longitudinal section through
same.
Fig. 3 is a cross section on line x, x, of Fig. 1 and Fig. 4 is a plan of the
strip of metal from which the chain or band is constructed and hereinafter
referred to.
Fig. 5 is a side elevation of a gear wheel such as employed in connection with
my improved chain, a part of it being shown in section, and Fig. 6 is an end
view of same.
Fig. 7 is a plan of the chain wheel with a portion of the chain or band in
position.
In constructing my improved chain or band I take a strip of steel or other suitable
material a (Fig. 4) which is cut or pierced as indicated by the lines, the
portions b, b, being then bent back so as to form the intermediate links or blocks c
(Figs. 1, 2, and 3) which are of a double thickness of material and leaving between
said links the open spaces c¹ designed to accomodate the teeth t of the gear wheel.
The edges of the strip a are turned or seamed over a steel wire d upon each side for
increased strength while through the centre of each link ca steel pin f (Fig. 3) is
passed the ends being beut over so as to form the outside pulling or external teeth g,
which may be further secured by a central rivet or rivets as shown at Fig. 1 or it.
may be brazed in position.
The gear wheel such as used in connection with the above chain comprises
essentially two side flanges having suitably shaped recesses m designed to receive
the external teeth g, while the central portion of the wheel has formed around the
periphery teeth t as shown designed to take into the spaces or openings c¹ between
the links c.
It will thus be seen that a double pulling arrangement is provided vis: firstly by

page_text: the teeth taking into the spaces e between the links and secondly by reason of
the external teeth or pins g taking into the recesses m formed in the flanges h of the
wheel, and by this means it is obvious that the strain upon the individual teeth is
greatly reduced.
Any suitable means for coupling or connecting the ends of the chain may be
employed.
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
A driving elmin or band constructed out of a strip of metal substantially as
set forth.
2. A driving chain or band constructed out of a strip of metal and having a
double pulling arrangement, substantially as set forth.
3. A driving chain or band constructed out of strip of metal and having
portions b, b, cut or pierced and bent back so as to forms links of a double thickness
of material c, in combination with external teeth y formed by menus of a steel pin
such as passed through the centre of the links and having its ends bent over as
shown and strengthening wires such as d, substantially as herein described and
shown, and for the purposes specified.
C
4. In combination with a chain or hand such as above claimed a gear wheel having
side flangesh furnished with recesses m designed to receive the external teeth or
pins and central teeth designed to enter the spaces between the links c,
substantially as herein described and shown, and for the purposes specified.
57. The improvements in chains and driving wheels for velocipedes and the like,
substantially as herein described and shown, and for the purposes specified.
P. G. CASSELL
(Of Cassell, & Co.)
22. Glasshouse St. Regent St. London, W.
Agent for the applicant.