Improvements in Driving-chains.
Year: 1890

page_text: Date of Application, 26th Feb., 1890
Complete Specification Left, 19th Sept., 1890-Accepted, 25th Oct., 1890
PROVISIONAL SPECIFICATION.
Improvements in Driving-chains.
I, CHARLES HENRY BRAMPTON of the firm of F. W. Brampton & Co. of
14 Oliver Street Birmingham in the County of Warwick Manufacturer do hereby
declare the nature of my said invention to be as follows:-
My invention has for its object improvements in driving chains which are
applicable to such purposes as the driving of bicycles, tricycles and other
velocipedes and machinery and is constructed to distribute the wear over a large
surface by a particular formation of the parts and construction of the chain. It is
as follows:
...
Every other link of my chain has a large hole bored through it indeed as large as
the eye of the link will allow and the intermediate or outside links have the usual
sized or smaller holes in them to correspond with the size of the pivot or joint
pin used.
Upon the pivot or joint pin I shrink or otherwise fasten two hardened steel or
other metal washers, one at each end in combination with a central antifriction roller
placed upon the pin between the two hardened washers so that it will turn and run
easily. I then place on each side one of the inner links having the large holes to drop
easily with a good but free fit upon the hardened washers when the outer or small
holed coupling links are placed upon the projecting ends of the pivot pins and
are there rivetted or otherwise so thoroughly fastened that, the pins cannot turn
therein.
. i
The bend of the chain therefore takes place in the large links outside the
hardened washers thus producing a much larger wearing surface than there would
otherwise be. The antifriction rollers of course are loose upon the pins to turn round
as the chain works and they may be solid or bent round.
T21
سنو
1
1000
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Driving-chains.
:.
I CHARLES HENRY BRAMPTON of the firm of F. W. Brampton & Co. 14 Oliver
Street Birmingham in the County of Warwick Manufacturer do hereby declare the
nature of my said invention and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement :—
My invention has for its object improvements in driving chains which are
applicable to such purposes as the driving of bicycles tricycles and other
velocipedes and machinery and is constructed to distribute the wear over a large
surface by a particular formation of the parts and construction of the chain. It is
as follows.
Every other link of my chain has a large hole bored through it, indeed as large as
the eye of the link will allow and the intermediate or outside links have the usual
sized or smaller holes in them to correspond with the size of the pivot or joint
pin used.
Upon the pivot or joint pin I shrink or otherwise fasten two hardened steel or
other metal washers, one at each end in combination with a central antifriction roller
placed upon the pin between the two hardened washers so that it will turn and ran
easily. I then place on each side one of the inner links having the large holes to

page_text: drop easily with a good but free fit upon the hardened washers when the outer or
small holes coupling links are placed upon the projecting ends of the pivot pins
and are there rivetted or otherwise so thoroughly fastened that the pins cannot
turn therein.
The bend of the chain therefore takes place in the large links outside the
hardened washers thus producing a much larger wearing surface than there would
otherwise be. The antifriction rollers of course are loose upon the pins to turn
round as the chain works and they may be solid or bent round.
In order that my invention may be clearly understood and more easily carried into
practice i have appended hereunto a double sized sheet of drawings upon which I
have fully illustrated the nature of my said improvement.
Figure 1 is a side elevation of a piece of my chain in its complete state.
Figure 2 is a front elevation of same.
Figure 3 is an elevation of the centre pin.
Figure 4 is an elevation of the centre pin having on the washer at one end.
Figure 5 is an elevation of the centre pin having on the washer at both ends and
the intermediate friction roller.
Figure 6 is a horizontal section through the length of the chain but shewing the
pins and washers in elevation.
Figure 7 is an elevation of the inner link A.
Figure 8 is an elevation of the outer link B.
In carrying my invention into effect each of the links A are provided with the
enlarged ends a¹ through which the hole a' is bored as large as the end a³ of the links
will admit. The intermediate or outside links B are provided with the usual sized or
smaller holes to correspond with the size of the pivot or joint pin E. Upon the pivot
or joint pin E I shrink or otherwise fasten the two hardened steel or other metal
washers e¹ one at each end against the shoulders e and e' of the pin between which
the central antifriction roller F is mounted to turn or run easily upon the pin E. The
inner links A are mounted with their large holes a¹ upon the hardened washers e¹ so
as to have a good easy fit the outer or small holed coupling links B being placed
upon the projecting ends and of the pivot pins E, and are riveted sufficiently
tight against the washers el to prevent the pins E turning therein. The band of the
chain therefore takes place in the eye a' of the large links A and outside the hardened
washors e thus producing a much larger wearing surface at the moveable joint than
there would otherwise be. One of the washers e¹ may be solid with the pin E and
the antifriction roller F may be solid and drilled or bent round into the required
shape.
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
The improvements in driving chains consisting of the enlargement e¹ of the pin E
in combination with the antifriction rollers F substantially as and for the purpose
herein set forth and shewn upon the drawings.
Dated this 18th day of September 1890.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.