IMPROVEMENTS IN DRIVING CHAINS
Year: 1884

page_text: "
I JOHN Fox of 128 London Wall in the city of London Machinist do hereby
declare the nature of my said invention for "IMPROVEMENTS IN DRIVING CHAINS
to be as follows :—
This invention relates to certain improvements in driving chains the object being
to produce a chain which will lie flat and close to the work, has readily renewable
links can be produced at slight cost and yet be of considerable strength and has
extending arms or so-called trunnions that may engage with teeth of chain wheels
whilst the rest part of the chain will lie on the face of the driver and driven
wheels between the teeth.
In constructing this chain each link piece is stamped out of sheet metal of
substantially tee shape. In the head of the tee a long hole is stamped and the
upright of the tee terminates in a tang. This tang will be turned up to form a
hook so finishing the link. In putting the chain together the tang hook of one
link is inserted in the hole of the head of the next link and so on until a sufficient
length is obtained when to complete an endless chain the tang of the first link will
be hooked into the hole of the last link. The arms of the head of the tee pieces
forming the link also form the projecting pieces or trunnions of the chain for
engaging with the teeth of the chain wheels.
According to the weight and strength of the chain so will be the gauge and
quality of the metal from which the link pieces will be struck out. For a steel
chain the links will be made as described and then they can be tempered. In the
event of a link of the chain becoming defective or breaking a fresh link can be
reapplied immediately.
I use this chain and two chain wheels grooved in the centre and with double
sets of teeth on each side for driving the upper and lower shafts of sewing
machines.
I use this chain in like manner for driving tricycles and such like velocipedes
and for other purposes where continuous chains are used.
Lacing holes may be used stamped in the arms of the links when the chain is to
be used for carrying and endless apron for instance.
WALTER A. BARLOW,
6, St. Paul's Churchyard, E.C.

page_text: COMPLETE SPECIFICATION,
I JOHN Fox of 128 London Wall in the city of London, Machinist do hereby
declare the nature of my invention for "IMPROVEMENTS IN DRIVING CHAINS" 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 certain improvements in driving chains, the object
being to produce a chain which will lie flat and close to the work, has readily
renewable links, can be produced at slight cost, and yet be of considerable strength,
and has extending arms or so called trunnions that may engage with teeth of chain
wheels, whilst the rest part of the chain will be on the face of the driver, and
driven wheels between the teeth.
In constructing this chain, each link piece is stamped out of sheet metal or may
be cast of substantially tee shape, as shown in Fig 1, of the accompanying sheet of
drawings.
In the head of the tee a long hole a, is cast or stamped, and the upright of the tee
terminates in a tang b. This tang b, will be turned up to form a hook so finishing
the link as shown in Figs 2 and 2, of the drawings. In putting the chain together
the tang hook b, of one link is inserted in the hole a, of the head of the next link,
and so on, as shown in Figs 3, and 3a, until a sufficient length is obtained when, to
complete an endless chain the tang of the first link will be hooked into the hole of
the last link. The arms c, of the head of the tee pieces forming the link, also form
the projecting pieces or trunnions of the chain for engaging with the teeth d, of
the chain wheels e, shown in Figs 4 and 4a of the drawings, which represent
respectively a face and side view of the form of chain wheel employed.
According to the weight and strength of the chain so will be the gauge and
quality of the metal from which the link pieces will be struck out or cast. For a
steel chain the links will be made as described and then they can be tempered.
In the event of a link of the chain becoming defective or breaking, a fresh link
can be reapplied immediately. I use this chain and two chain wheels, grooved in
the centre, and with double sets of teeth on each side as shown in the drawings,
for driving the upper and lower shafts of sewing machines.
I use this chain in like manner for driving tricycles, and such like velocipedes,
and for other purposes where continuous chains are used.
Lacing holes f, may be cast, stamped or drilled in the arms of the links as shown
in Fig 2, when the chain is to be used for carrying an endless apron for instance.
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
The improvements in driving chains giving a flat renewable link, with the
trunnions or arms for engaging with the driver, and driven wheels, and constructed
and operating as and for the purpose herein set forth, and shown by the drawings.
Dated this 16th done of the TOOK