Improvements in Driving Chains.
Year: 1891

page_text: Date of Application, 21st Dec., 1891
Complete Specification Left, 19th Oct., 1892-Accepted, 17th Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Driving Chains.
I WILLIAM GWINNETT Mechanic 74 Temple Street Wolverhampton, in the
County of Stafford, do hereby declare the nature of this invention to be as
follows:-
This invention relates to an improvement in cycle and other machine chain and
has for its object the following: Is not liable to stretch as other chains. Can be
adjusted for wear in joints. Friction minimised by placing balls to take the bearing
in joints of chain but where expence is considered by leaving balls out the chain
can be adjusted with cones only. The chain is made as follows: The two side
plates of the inner links are stamped with projecting pieces on each end on the
inner side so that when the two side plates are joined the two projecting pieces
form the block or distance pieces between these plates which form the inner links.
At each end of these inner links there are holes drilled throught the side of plates
passing centre of projecting or distance pieces.
On the outer sides at each end the holes are chambered out about an " (the inner
links) deep and 3" dia. or as required similar to other ball bearingcases. The two
side plates of the outer links have two projecting pieces stamped on each end of
the inner side. These are cone shaped and can be made to fit into the chambered
out holes on the outer sides of the inner links allowing for balls which are
about 1" dia. When balls are not to be used the holes in the inner links on
outsides should be chambered out a suitable taper and the projecting cone pieces
on the inside of the outter links should be made to fit them. The links are joined
together in the following way: At each end of the one side of the outer links the
holes are drilled about dia. clearence so are the two sides of the inner links but
the remaining side of the outer link is tapped by these means a bolt is put through
the one side of the outer link passing on through two sides of the inner links then
screwed through the remaining side that is tapped a small locknut is then screwed
on the end of the bolt which is left long enough for this purpose. By this means
the joints are made secure. Rivets may be used.
It will be seen by the description that there is very little work on. bolts or
rivets. The links should be hardened and tempered.
I claim to be the first to use balls in chain.
I also claim to be first to invent cones in joints of chain for adjusting ‘with or
without balls.
Dhin 10th dow of December 1901
COMPLETE SPECIFICATION.
Improvements in Driving Chains.
I WILLIAM GWINNETT, 74 Temple Street, Wolverhampton, in the County of
Stafford, Engineer or Mechanic 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 an improvement in cycle and other machine chain and
has for its object the following: Is not liable to stretch as other chains. Can be
adjusted for wear in joints. Friction minimised by placing balls to take the bearing
in joints of chain, but where, expense is considered by leaving balls out the chain
can be adjusted with cones only. The chain is made as follows:-The two side

page_text: *
plates of the inner links are stamped with projecting pieces on each end on the
inner side, so that when the two side plates are joined, the two projecting pieces
form the block or distance pieces, between these plates which form the inner
links. At each end of these inner links there are holes drilled through the side of
the plates passing centre of projecting or distance pieces.
On the outer sides at each end, the 'holes are chambered out about an deep (the
inner links) " dia. or as required similar to other ball bearing cases. The two
side plates of the outer links have two projecting pieces, stamped on each end of
the inner side. These are cone shaped, and can be made to fit into the chambered
out holes, on the outer sides of the inner links, allowing for balls, which are about
" dia. When balls are not to be used the holes in the inner links on the out
sidės, should be chambered out a suitable taper and the projecting cone pieces on
the inside of the outer link, should be made to fit them.
The links are joined together in the following way-At each end of the one
side of the outer links, the holes are drilled about " dia. clearence, so are the two
sides of the inner links, but the remaining side of the outer links is tapped. By
these means:- -A bolt is put through the one side of the outer link, passing on
through two sides of the inner link, then screwed through the remaining side, that
is tapped. A small lock nut is then screwed on the end of the bolt which is left
long enough for this purpose. By this means the joints are made secure. Rivets
may be used.
It will be seen by the description, that there is very little work on bolts, or
rivets. The links should be hardened and tempered.
The drawing Fig. 1 is a side view of the chain.
D represents the balls, size according to the size of the chain.
E, rivet holes.
*C, one side of outer links.
O, the side of inner links.
Fig. 2, a sectional view.
A, end of inner links.
B, chamber for balls.
E, holes where, rivets or bolts pass through.
F, rivets in their places.
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. To be the first to use balls in chain for minimising friction.
2nd. To make chain, suitable for balls.
3rd. First to make chain, that can be readjusted, when worn.
Dated this 18th day of October 1892.