Year: 1896

page_text: one piece with its pivot.
Figures 8 and 9 are sectional views on lines E-F and G-H respectively of
Figure 7.
The block a is of the ordinary pattern, provided with two holes a' which receive
the pivots of the two parts forming the link; this block a thus serving to join two
links as in the ordinary block chain.
The links are formed of two parallel parts, which parts are absolutely identical
and interchangeable. They each consist of a side plate c of the shape shown on
Figure 2, and formed in one piece with a pivot or cross pin c'. This pivot or pin c¹
is grooved at its end as at c; this groove prevents the pivot c¹ from being
withdrawn from the side plate opposite to that with which it is formed, when the
chain is slightly stretched, see Figure 2.
The side plate c, the shape of which is clearly shown on Figures 6 and 7, is
provided with a slot formed by a circular opening c corresponding in diameter to
that of the pivot c'. The circular opening es is prolonged, on the side remote from
the pivot c', into a groove e corresponding in width to the diameter of the neck c
of the pivot. The groove c is therefore marrower than the circular opening c³.
The length of the pivot c! from the neck or groove to the side plate c is equal to
the width of the block a.
To put this chain together, the pivot c¹ is passed through one of the holes a¹ of
the block a; a second pivot c is passed through the hole al in another block a.
After which the head of each pivot c' is introduced within the opening of the
opposite side plate in such a manner that the neck of the pivot is in the same
plane as the groove of the plate c Upon pulling the side plates longitudinally
and in opposite directions, the necks c2 of the pivots will pass into the grooves c
and the first link is formed; the heads e prevent the pivots from being withdrawn
laterally.
The second link of the chain is formed by means of a thir. block and of two
more side plates. The pivot of one of these latter is inserted in the remaining
perforation of the second block and the pivot of the fourth side plate is inserted
within one of the perforations of the third block; the remainder of the operation is
performed as in the case of the first link.

page_text: In the formation of this and successive links the block of the two links about to
be formed, should be inclined at an angle of about 45° to the length of the chain 30
as to facilitate the insertion of the head of the pivot in the opening c³ of the side
plate c. The ends of the side plates almost touch (see Figures 2 and 3) when
the chain is straight and in this position it is practically impossible to set up or to take
the chain to pieces because to do so, the head of the pivot must pass into the
opening of the opposite side plate. The prolongation of these extremities e so
that they meet or almost meet, is important to the safety of the cyclist because in
order that the chain may accidentally come to pieces, it would be necessary for it
to be considerably shortened which is almost impossible in practice; the whole of
the parts of the chain are longitudinally straight and cannot become lengthened.
I do not confine myself to the use of the above invention in connection with a
bicycle or similar wheeled vehicle, as obviously the chain can be employed for
many other different purposes.
Dated this Twenty-fifth day of June 1896.
I, HONORÉ JACQUET of 23 Rue Chéri, Liége, in the Kingdom of Belgium,
Builder, 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 the construction of chain links for cycle and the like
gearing by means of which any number of links can be easily detached and by hand
from the main portion of the chain.
Upon the sheet of drawings which accompanied my Provisional Specification,
illustrating my invention,
Figure 1 is a plan of the chain.
Figure 2 is an elevation of the same, and
Figure 3 is a section on line A-B of Figure 2.
Figure 4 is a side view of the block, and"
Figure 5 a section on line C-D of Figure 4.
Figures 6 and 7 illustrate an elevation and plan respectively of a link made in one
piece with its pivot.
Figures 8 and 9 are sectional views on lines E-F and G-H respectively of
Figure 7.
The block a is of the ordinary pattern, provided with two holes a' which receive
the pivots of the two parts for:ning the link; this block a thus serving to join two
links as in the ordinary block chain.
The links are formed of two parallel parts, which parts are absolutely identical
and interchangeable. They each consist of a side plate c of the shape shown on
Figure 2, and formed in one piece with a pivot or cross-pin c'. This pivot or pin c
is grooved at its end as at c; this groove prevents the pivot e from being
withdrawn from the side plate opposite to that with which it is formed, when the
chain is slightly stretched, see Figure 2.
The side plate c, the shape of which is clearly shown on Figures 6 and 7, is
provided with a slot formed by a circular opening e corresponding in diameter to
that of the pivot c. The circular opening c³ is prolonged, on the side remote from

page_text: the pivot c', into a groove e corresponding in width to the diameter of the neck
of the pivot. The groove c is therefore narrower than the circular opening c³..
The length of the pivot c' from the neck or groove to the side plate c is equal to
the width of the block a.
To put this chain together, the pivot c' is passed through one of the holes a¹ of
the block a; a second pivot is passed through the hole al in another block a,.
after which the head of each pivot c' is introduced within the opening c of the
opposite side plate in such a manner that the neck of the pivot is in the same-
plane as the groove c' of the plate c. Upon pulling the side plates longitudinally
and in opposite directions the necks of the pivots will pass into the grooves c
and the first link formed; the heads e prevent the pivots from being withdrawn.
laterally.
The second link of the chain is formed by means of a third block and of two more.
side plates. The pivot of one of these latter is inserted in the remaining perforation
of the second block and the pivot of the fourth side plate is inserted within one of
the perforations of the third block; the remainder of the operation is performed:
as in the case of the first link.
In the formation of this and successive links the block of the two links about to.
be formed, should be inclined at an angle of about 45° to the length of the chain.
so as to facilitate the insertion of the head of the pivot in the opening of the
side plate c. The ends of the side plates calmost touch (see Figures 2 and 3).
when the chain is straight and in this position it is practically impossible to set up
or to take the chain to pieces because to do so, the head e of the pivot must pass
into the opening c³ of the opposite side plate. The prolongation of these extremities.co.
50 that they meet or almost meet, is important to the safety of the cyclist because
in order that the chain may accidentally come to pieces, it would be necessary for
it to be considerably shortened which is almost impossible in practice; the whole
of the parts of the chain are longitudinally straight and cannot become lengthened.
1 do not confine myself to the use of the above invention in connection with a
bicycle or similar wheeled vehicle, as obviously the chain can be employed for
many other different purposes.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
1. A driving or sprocket chain capable of being taken to pieces in the manner
described, and consisting of a block a provided with holes a', and a side plate o
formed in one piece with a pivot or cross pin e' having a groove c² and furnished
with a slot cc to retain the pivot of the opposite side plate c so that when all:
these parts have been fitted together, the opposite extremities of the side plates.
are in turn so drawn together that they prevent the accidental coming apart of
the components of the chain.
2. Chains for cycle and the like gear, constructed combined and arranged.
substantially as and for the purposes described and illustrated upon the sheet of
drawings filed with my Provisional Specification.
Dated this 19th down of March 1907