Year: 1897

page_text: We, SALVADOR PASTOR, Gentleman, of 12 Rue de la Sorbonne, Paris, in the
Republic of France, and CHARLES MUSTON, Justice of the Peace, of Algiers,
Algeria, do hereby declare the nature of this invention to be as follows:-
Our invention relates to an improved chain for the transmission of motion.
which chain is susceptible of various mechanical applications and is more
especially intended to be applied to bicycles tricycles and other veloipedes.
Our invention is characterized by the special arrangement of the link-joints,
which enables the speed of transmission to be increased.
In our chain the links are jointed together by an eccentric hinge-joint in such
a manner that the effective length of a link will be less in the parts of the chain
which are in a straight line, than in the parts thereof which are curved.
From this arrangement it results that the speed of translation of a link is
increased when it returns to a straight line, for it then receives a double displace-
ment: (1) A motion of translation as an element of the chain; and (2) A forward
displacement to again assume its normal distance from the link which precedes it.
It is evident that the link will transmit this increase of speed to the pinion
over which the chain passes.
In order that our said invention may be clearly understood, we have shown
our improved chain in the accompanying drawing, in principle, but by way
of example only.
Figure 1 is an elevation of the said chain.
Figure 2 is a transverse section on the line 1, 2, 3, Figure 1, and
Figure 3 is a detail view of one link detached.
In these figures, like letters of reference indicate corresponding parts.
Our chain consists, essentially, in a series of links a connected together as
follows, viz
Each link is provided with a roller 6 capable of turning freely about an axis c,
and with an axis d on which are mounted a packing-piece e serving to compensate
for the thickness of the roller b, two discs f, between which the succeeding link
is guided, and two rollers g which engage with the teeth in the two plates h of
the pinion
or chain-wheel to be driven by the said chain.
Moreover each link a is provided with an internal recess i formed in such a
manner that when the links are in a curved part of the chain, the roller b of one

page_text: link, engages with the recess i of the next link, and, on the contrary, when the
links are in a straight line with each other, each roller b is in contact with the
part of the succeeding link.
From this arrangement it results that, when a link moves into a straight line
with the adjacent link, it receives a double motion, viz:-the movement of
translation which each element of the chain receives, and a forward motion in
the same direction produced by the eccentric arrangement formed by the recess i
and the curved part j.
This acceleration of motion communicates an increase of speed to the pinion
or chain-wheel h.
It is to be understood that, during all these motions, the length of the chain
remains the same, since as one link returns to a position in a straight line with
the adjacent link, and its distance from the preceding link consequently becomes
less, another link leaves the straight line to come into engagement with one of
the teeth of the pinion or chain-wheel and its distance from the following link
consequently increases by an equal amount.
As has been mentioned above, our chain can be applied in various ways and
we can modify the form, dimensions, and secondary arrangements thereof accord-
ing to the requirements of each particular application.
Dated
11h day of Rohmam 1807
D. YOUNG & Co.,
11 and 12 Southampton Buildings, London, W.C.,
Agents for the Applicants.
An Improved Chain for the Transmission of Motion.
We, SALVADOR PASTOR, Gentleman, of 12 Rue de la Sorbonne, Paris, in the
Republic of France, and CHARLES MUSTON, Justice of the Peace, of Algiers,
Algeria, 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:-
Our invention relates to an improved chain for the transmission of motion,
which chain is susceptible of mechanical applications of all kinds, and is more
especially intended to be applied to bicycles, tricycles, and other velocipedes.
Our invention is characterized by the special arrangement of the link-joints,
which enables the speed of transmission to be increased.
In our chain the links are jointed together by an eccentric hinge-joint in such
a manner that the effective length of a link will be less in the parts of the chain
which are in a straight line, than in the parts thereof which are curved.
From this arrangement it results that the speed of translation of a link is
increased when it returns to a straight line, for it then receives a double displace-
ment (1) A motion of translation as an element of the chain; and (2) A forward
displacement to again assume its normal distance from the link which precedes it
It is evident that this link will transmit this increase of speed to the pinion
over which the chain passes.
In order that our said invention may be, clearly understood, we have shown
our improved chain in the drawing accompanying our Provisional Specification,
in principle, but by way of example only:-
Figure 1 is an elevation of the said chain.
Figure 2 is a transverse section on the line 1, 2, 3, Figure 1, and
Figure 3 is a detail view of one link detached.
In these figures, like letters of reference indicate corresponding parts.

page_text: Our chain consists, essentially, in a series of links a connected together as
follows, viz:-
Each link is provided with a roller 6 capable of turning freely about an axis c,
and with an axis d on which are mounted a packing-piece e serving to compensate
for the thickness of the roller b, two discs f, between which the succeeding link
is guided, and two rollers g which engage with the teeth in the two plates h of
the pinion or chain-wheel to be driven by the said chain.
Moreover each link a is provided with an internal recess i formed in such a
manner that when the links are in a curved part of the chain, the roller b of one
link engages with the recess of the next link, and, on the contrary, when the
links are in a straight line with each other, each roller b is in contact with the
part of the succeeding link.
From this arrangement it results that, when a link moves into a straight line
with the adjacent link, it receives a double motion, viz:-the movement of
translation which each element of the chain receives, and a forward motion in
the same direction produced by the eccentric arrangement formed by the recess i
and the curved part j.
This acceleration of motion communicates an increase of speed to the pinion
or chain-wheel h.
It is to be understood that, during all these motions, the length of the chain
remains the same, since as one link returns to a position in a straight line with
the adjacent link, and its distance from the preceding link consequently becomes
less, another link leaves the straight line to come into engagement with one of
the teeth of the pinion or chain-wheel and its distance from the following link
consequently increases by an equal amount.
As has been mentioned above, our chain can be applied in various ways and
we can modify the form, dimensions, and secondary arrangements thereof accord-
ing to the requirements of each particular application.
The discs f, instead of being circular, can be properly shaped and chamfered
on their periphery in such a manner as to permit the chain to be readily taken
to pieces, link by link; and for this purpose each link will be provided with a
similar chamfered part designed to facilitate the taking of the chain to pieces.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed, we declare that what
we claim is :-
:-
A chain for the transmission of motion, with eccentric hinge-joints arranged
substantially as hereinbefore described with reference to the drawing and for the
purpose specified.
Dated the 13th day of Oktobar 1897
tober 1897
D. YOUNG & Co.,
11 and 12 Southampton Buildings, London, W.C.,
Agents for the Applicants.