Improvements in Velocipede Gearing and similar Chains.
Year: 1895

page_text: Date of Application, 29th May, 1895
Complete Specification Left, 2nd Mar., 1396-Accepted. 29th June 1896
PROVISIONAL SPECIFICATION.
Improvements in Velocipede Gearing and similar Chains.
JOHN FREDERIC LEWIN Boot-maker, 19, Ilkeston Road, Nottingham, England
DIGBY HENRY LEWIN, Plumber, 19 Ilkeston Road, Nottingham, England, do
hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in the means for connecting the links of
velocipede gearing chains or the like, and it has for its object more especially to
provide a more convenient detachable connection or connections for the links in
order that the chain may be readily removed, and replaced or cleaned.
Also to
give greater clearance for gear cases and narrow treads.
In carrying out this invention, the ordinary connecting pin and nut is dispensed
with, and in its place is a plain pin or bolt, being preferably longer than the width
of the chain, so that each end after insertion, shall project beyond the sides of the
connecting links of the chain.
The locking of the pin is accomplished by a second or outside plate corresponding
in form to the side link or links of the chain; being placed on each side of the
chain and fixed to the chain by a rivet passing through one end and slightly
clinched, so that the outer side plate or plates will be on a swivel or hinge, and
being made of pen steel or any suitable material, will form a spring each side of
the chain.
After the connecting pin is inserted these springs are pushed over the ends of
the connecting pin, thus preventing the pin from getting out of place. The pin is
rounded or tapered at each end, and that part of the outer plates or springs which
touches the ends of the pin when said springs are in their proper places, is punched
outwards, thus forming a recess for each end of the pin, and at the same time
preventing the springs from getting out of place.
The connecting pin is preferably formed with one flat side running its whole
length, and fitting into correspondingly shaped holes in the side plates, the object
being to prevent the pin from revolving.
The two outer plates or springs may be formed in one piece, by being connected
by a bridge or bar across the top or outer part of the chain, and nearest to that
end which goes over the pin; thus strengthening the action of the springs, &
forming them into a clasp.
In connecting the chain the bar is pressed by the hand, thus causing the clasp to
snap over the ends of the pin; and in disconnecting, a suitable lever may be placed
under the bar to force the clasp off of. the ends of the pin, which may then be
withdrawn.
Instead of fixing the springs or clasp by means of the ordinary rivet of the
chain, they may be formed somewhat shorter than the side plates & be riveted to
the side plates, but nearer to the centre of the said plates, thus forming an
ndependent fastening; the shortening of the springs also conducing to the
strengthening, or stiffening of them.
Dated this 28th day of May 1905
JOHN FREDERIC LEWIN,
DIGBY HENRY LEWIN,
Applicants.

page_text: Improvements in Velocipede Gearing and similar Chains.
We, JOHN FREDERIC LEWIN, Boot Maker, and DIGBY HENRY LEWIN,
Plumber, both of 19, Ilkeston Road, Nottingham, in the County of Nottingham,
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 relates to improvements in the means for connecting the links of
velocipede gearing chains or the like and has for its object more especially to
provide a more convenient detachable connection or connections for the links in
order that the chain may be readily removed and replaced or cleaned. Also to
give greater clearance for gear cases and narrow treads.
We will describe this invention by referring to the accompanying drawing on
which
Fig. 1 represents a portion of a gearing chain with our invention applied;
Fig. 2 is a sectional plan of the same;
Fig. 3 shews the same when turned up ready for the removal of the joint pin;
Fig. 4 shews the joint pin separately;
Figs. 5 and 6 illustrate a portion of a gearing chain with a slightly modified
form of our invention applied thereto;
Figs. 7 and 8 shew a portion of a gearing chain with a further modification of
our invention;
Figs. 9, 10 and 11 shew a portion of a gearing chain with a further modification
of our invention applied to the same.
The same letters of reference indicate the same or corresponding parts in all the
figures of the drawing.
In carrying out this invention the ordinary headed connecting bolt and its
nut are dispensed with and instead thereof we connect the two ends of the
chain together by a plain joint pin A which is by preference slightly longer
than the width of the chain across the side links B1 B so that the ends of the
pin A after insertion will, as shewn in Figs. 2, 3, 6, 8 and 11, project slightly
beyond the sides of the links B₁ B' of the chain for the purpose hereinafter
described.
The locking of the pin A is accomplished by two outer spring plates C¹ C³
made of pen steel or other suitable material which are jointed to the outside of the
side links B' B' and are made to either turn down and snap over and cover the
rounded or tapered ends of the joint pin A or turn up and expose the ends of
the joint pin. When the outer spring plates C₁ C are turned down as aforesaid
the ends of the joint pin engage in corresponding recesses in the outer spring
plates and thus keep the latter in position and the spring plates prevent the joint
pin from coming out of the hole in the links. To disconnect the ends of the chain
the spring plates have first to be turned up to expose the joint pin which latter
can then be withdrawn.
The said outer spring plates C₁C may be arranged and combined with the side
links B B of the chain in various ways which we will now describe.
Referring firstly to the arrangement of our invention shewn by Figs. 1, 2 and 3,
CC are the two outer spring plåtes corresponding with the side links B' B
and jointed to the outside of the same by the usual joint rivet E which passes
through each of the spring plates C₁ C' and is slightly clenched over so that the
outer spring plates C₁ C will be free to turn up or down about this rivet and when
turned down, as in Figs. 1 and 2, the outer spring plates C₁ C' will snap over the
rounded ends of the joint pin A which will then engage in the recesses c¹ in each
of the outer spring plates C¹ C³ thus keeping the latter and the joint din A in

page_text: place. To remove the connecting pin A, to disconnect the chain, the locking-
plates CC have first to be turned up as shewn in Fig. 3 and then the joint pin A
can be withdrawn.
The connecting pin A is preferably formed in a well known way with one flat
side a as shewn in Fig. 4 and the holes in the side links B' B are made with.
holes of corresponding shape so that the flat a¹ will prevent the joint pin A from.
turning. A joint pin A with the flat side is well known and we make no claim in
respect of this feature.
Instead of the outer spring plates C¹ C being secured to the side links B₁ B' by
the rivet E which secures the side plates B1 B2 to the intermediate block D' as
shewn in Figs. 1, 2 and 3, the outer spring plates C¹ C³ may, as shewn in Figs. 5.
and 6, be made somewhat shorter than the side plates B B' and arranged to turn
on independent rivets F which secure them to the side plates 131 Bs and enable-
them to turn up (Fig. 6) or down (Fig. 5) for the purpose of securing the joint
pin A or of removing the same as above described with reference to Figs. 1,
and 3.
2-
Instead of the two outer spring plates C₁ C being made separate from each.
other as in the arrangement shewn by Figs. 1, 2, 3, 5 and 6, the two plates C¹ C
Inay, as shewn in Figs. 7 and 8 and in Figs. 9 and 12, be formed in one piece by
being connected together by a bridge or bar C across the outer part of the chain
and near to those ends of the side spring plates C1 C which go over the joint
pin A thus strengthening the two spring plates and forming them into a clasp..
The outer spring plates when formed together in this way may either be arranged
to turn on the rivets E as in Figs. 7 and 8, or as in Figs. 9, 10 and 11 they may
be arranged to turn on separate rivets F. When the joint pin A has been placed
in position in the holes in the links the crossbar C³, is pressed by the hand thus.
causing the clasp C₁ C³ to snap over the ends of the pin A and secure the same as
above described. When it is required to remove the joint pin A a suitable lever
may be placed under the cross bar C³ to force the clasp off the ends of the pin A
and turn the same up to the position shewn in Figs. 8 and 10.
Having now particularly described and ascertained the nature of our said inven-.
tion and in what manner the same is to be performed, we declare that what we
claim is :-
In velocipede gearing chains and in similar chains the employment of a joint
pin passing through the side links and made with rounded or tapered ends
projecting beyond the faces of the links in combination with two spring plates
such as CC jointed to the two side links and made with depressions c' so as to
either snap over and enclose the ends of the joint pin to secure the same in place
or turn up and allow of the joint pin being removed, the said spring plates being
either made separate from each other (Figs. 1, 3, 5 and 6) or in one piece (Figs. 7,
8, 9 and 10) all substantially as herein before described and illustrated by the
accompanying drawing.
Dated this 29th day of February 1896.
CHARLES BOSWORTH KETLEY..
Agent for the Applicants.