Improvements in Driving Chains for Cycles and other Vehicles and in the Manufacture of the same.
Year: 1899

page_text: Date of Application, 12th June, 1930
Complete Specification Left, 10th Mar., 1900-Accepted, 14th Apr., 1900
Complete Specification Left, 10th Mar., 1900-Accepted, 14th Apr., 1900
PROVISIONAL SPECIFICATION.
Improvements in Driving Chains for Cycles and other Vehicles
and in the Manufacture of the same.
I, GEORGE FREDERICK BULL, Works Manager to the Alfred Appleby Twin
Roller Chain Limited, of Parkfield Road, Saltley, in the City of Birmingham,
do hereby declare the nature of this invention to be as follows:
-
This invention has for its object improvements in driving chains ior cycles
and other vehicles and is a further improvement on my ratent No. 10,205,
A.D. 1898, and refers to the attachment in roller chains of the steel bushes to
the side links by which I prevent the two from becoming disconnected by any
strain which may be brought to bear upon the chain and at the same time i
effect my improvement without any addition to the cost of manufacture, while
another part of my invention has for its object the more complete lubrication
between the pins, bushes and rollers.
In carrying my invention into effect, at the same time that I form the inward
projections in the piercings of the links as described in my afore-mentioned speci-
fication, I provide a recess around that part of the piercing where no projection
occurs. The bushes are then driven home into the piercings until their ends
are flush with or slightly in front of the outside of the plates and the projec-
tions formed in the piercings are home in the dovetailed cutaway parts of the
bush, after which the revolving press tool or other contrivance which is caused
to enter the ends of the bushes for the displacement of the metal projection
into the dovetailed slot also presses over the extreme edges of the bushes into
the recesses formed in the side links to receive them and thus connects the bush
to the side links all round in a thoroughly substantial manner.
Although I prefer to retain the projections in the piercing, I may, in some
cases, omit them, as also the dovetail cut-away part in the bush, in which case
I form the recess all round the piercing in the link and turn the whole of the
circumference of the bush once as before described. I do not confine myself
to any particular shape or form of recess, which may be varied to suit the
requirements to be met with.
For the more perfect lubrication between the pins and the bush I draw,
stamp or otherwise form one two or more grooves which run longitudinally
along the bearing part of the rivet or pin such grooves being cut away at each
end by the reduced part of the neck of the pin thus assisting in the free distri-
bution of the lubricant between the pins of the outer links and the bushes of
the inner links. In the case of the rollers, I diift or otherwise form one, two
or more internal grooves which run longitudinally through the bearing of the
roller so as to facilitate the distribution of the lubricant between the roller and
the aforementioned bush.
Instead of forming my grooves longitudinally I may form them spirally
around the rivet, such spiral groove being formed at the same time and in the
same machine as when reducing the ends of the rivets. While in use, the
spiral form is less likely to cut in wear than the straight grooves would be.

page_text: Instead of grooving the rollers and rivets, I may groove the steel bushes both
inside and out in a spiral direction, this being effected when in the strip steel
before being cut off and turned over by passing such strips through a pair of
rolls or between dies or other such means for forming the grooves therein, the
grooves in the top side being arranged to run in an opposite diagonal direction
to those on the underside to prevent any weakening of the metal.
Dated this 12th day of June 1899.
LEWIS WM. GOOLD,
Agent for Applicant,
5, Corporation Street, Birmingham.
Improvements in Driving Chains for Cycles and other Vehicles
and in the Manufacture of the same.
I, GEORGE FREDERICK BULL, Works Manager to the Alfred Appleby Twin
Roller Chain Limited, of Parkfield Road, Saltley, in the City of Birmingham,
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 statment:-
-
This invention has for its object improvements in driving chains for cycles
and other vehicles being a further improvement on my Patent No. 15205 of
1898 and refers to the attachment in roller chains of the steel bushes to the
side links by which I further decrease the possibility of the two becoming loose
or disconnected by any strain whether lateral or longitudinal which may occur
in the working of the chain and this I effect without any addition to the cost
of manufacture while at the same time a more perfect lubrication between the
pins bushes and rollers is obtained.
In order that my invention may be clearly understood and more easily carried
into practise I have appended hereunto a sheet of drawings upon which I have
fully illustrated the nature of my said improvements.
Figure 1 is an elevation of the roller connecting link.
Figure 2 is a longitudinal section through Figure 1.
Figure 3 is a longitudinal section through two rollers connected together by
the said links shewing on one side the bush in position before being secured
and on the other side the bush secured in position.
Figure 4 is an elevation of the bush before being inserted in the links.
Figure 5 is a longitudinal section through one of the bushes.
Figure 6 is an end elevation of same.
B
Figure 7 is a similar view to a portion of Figure shewing the operation of
securing the bushes in position.
Figure 8 is an end view of one of the tools shewn in Figure 7.
Figure 9 is an elevation of a metal blank hom which one of the bushes is
prepared.
Figure 10 is an elevation of one of the pins.
Figure 11 is a sectional elevation of one of the rollers.
Figure 12 is a general view of a piece of chain complete with connecting
links h.
e
In carrying my invention into effect, at the time of forming the projections
when piercing the links a, I also form the recess k around that part of the
piercing where no projection occurs. The bushes care then driven into the
piercings until their ends m are flush with or slightly in front of the outside

page_text: of the plates and the projections e are fully home in the dovetailed cut away
parts of the bush c after which a revolving press tool or other contrivance
such as is caused to enter the ends of the bushes for the displacing of the
mouth m of the bush into the recess k the same action also displacing that
superfluous metal of the projection which stands above the interior surface of
the bush e into the sides of the dovetailed slot of the bush' c. It will readily
be seen that the back edge r of the projection e prevents the links from being
forced onto the bushes sufficiently to jam the rollers while the opening out of
the mouth m of the bush into the recess prevents any possibility of the links «
becoming detached from any part of the ends of the bushes or of the bushes
becoming twisted laterally out of right angles with the links by which means
the tendency of the chain to stretch is reduced and a more true alignment
retained.
Although I prefer to form the connection as before described it is not neces-
sary to make the slot in the bush of dovetail shape or to have any clearance
between the sides of the slot and the sides of the projection in which case
no part of the projection is required to stand above the bush for displacement
while the slot and projection may then be of any shape so long as the back ŕ of
the projection meets the back of the slot n.
The means for securing the bush from any possibility of revolving in the
link such as shewn by the projections e and slots n may be varied by increasing
the number of slots and projections even to the extent of serrating the piere-
ing of the link and cutting the end of the bush to form teeth to correspond in
which case the turning over of the ends of the teeth by the tool as before
described displaces the metal of the teeth into the serrations at the same time
as the said ends are worked into the recess k around piercing. For the more
perfect lubrication between the pins f and the bushes c I draw stamp or other-
wise form one two or more grooves s which run longitudinally along the bear-
ing part of the rivet or pin such grooves being cut away at each end by the
reduced part of the neck t of the pin thus assisting in the free distribution of
the lubricant while in the case of the rollers I drift or otherwise form one two
or more longitudinal grooves through the bearing part of the roller or I may
in either case form the grooves spirally around the rivet or roller as shewn
by w
Instead of grooving the roller and rivets 1 prefer for cheapness to
groove the bush which I effect while the bush is in the strip before being
curled over by passing it through a pair of rolls or between dies or other such
means so as to form the said grooves as shown by where they are arranged
diagonally on each side so that the groove on the outside next the roller runs
in an opposite direction to that on the underside next the pin by which
diagonal arrangement of grooves the bush is not materially weakened and both
pin roller and bush are thereby more perfectly lubricated.
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
1 claim is:-
1st. In chains for driving cycles and other vehicles connecting the side links
to the bushes by displacing the ends of the said bushes into recesses formed
around the link piercing in combination with means for preventing the revolv-
ing of the bush in the piercing substantially such as and for the purpose herein
set forth.
2nd. In chains for driving cycles and other vehicles connecting the side
links by means of projections formed in the side link piercings with corre-
sponding slots in the bushes to receive them in combination with recesses round
part of the piercings into which the mouths of the bushes are displaced sub-
stantially such as and for the purpose herein set forth.
3rd. In chains for driving cycles and other vehicles connecting the side
links by means of projections formed in the side link piercings with dovetail

page_text: slots in the bushes the said piercings having recesses into which the end of the
mouth of the bush is displaced simultaneously with the displacement of the
projection into the dovetail slot of the bush.
4th. In chains for driving cycles and other vehicles connecting the side links
by split bushes grooved when in the strip having part of the ends cut away to
engage with projections formed in the piercings of the side links the remaining
portions of the said ends being turned into recesses formed around the side
link piercings substantially as and for the purpose herein set forth.
Dated this 9th day of March 1900.
LEWIS WM. GOOLD,
Agent for Applicant,
5, Corporation Street, Birmingham.