Improvements in the Manufacture of Chain for Chain Pumps.
Year: 1897

page_text: Date of Application, 13th Mar., 1897
Complete Specification Left, 1st Dec., 1897-Accepted, 8th Jan., 1898
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Chain for Chain Pumps.
I, SAMUEL BRASSINGTON BAMFORD, of the firm of Bamford & Sons, Leighton
Iron Works, Uttoxeter, in the County of Stafford, Engineer, do hereby declare
the nature of this invention to be as follows:
-
My invention relates to the manufacture of chain for chain pumps.
In using chain pumps it has been found that the wear and jar which take
place cause the discs or buckets to become loosened upon the links of the chain,
and it has also been found in practice that the long links between the links
carrying the discs or buckets have a tendency to get crossed and thus become
jammed in the barrel of the pump.
The object of my invention is to obviate these disadvantages and to this end I
make use of links having a twisted form so that the metal cast upon the links
will have a more permanent hold than hitherto and consequently will not be
loosened by wear and tear.
In the case of the links between the discs the middle portion of each link is also
twisted which has the effect of causing the chain to work smoothly.
Dated the 13th day of March 1897.
G. F. REDFERN & Co.,
4 South Street, Finsbury, London, Agents for the Applicant.
Improvements in the Manufacture of Chain for Chain Pumps.
I, SAMUEL BRASSINGTON BAMFORD, of the firm of Bamford & Sons, Leighton
Iron Works, Uttoxeter, in the County of Stafford, Engineer, 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:-
My invention relates to the manufacture of chain for. chain pumps.
1
In using chain pumps it has been found that the wear and jar which take
place cause the discs or buckets to become loosened upon the links of the chain,
and it has also been found in practice that the long links between the links
carrying the discs or buckets have a tendency to get crossed and thus become
jammed in the barrel of the pump.
The object of my invention is to obviate these disadvantages and to this end I
make use of links having a twisted form so that the metal cast upon the links
will have a more permanent hold than hitherto and consequently will not be
loosened by wear and tear.

page_text: To enable my invention to be fully understood I will described the same with
reference to the accompanying drawing, in which :-
Figure 1 is a plan view of a chain link of the form which I now employ having
a disc cast upon it, and,
Figures 2 and 3 are sections of the same on the lines 2-2 and 3-3 respectively
of Figure 1.
In these figures a indicates the link and b the disc, the said link having the
shape of the figure 8 and being formed by twisting the two ends of an ordinary
open link through an angle of about 180° relatively with one another.
The disc is cast upon the link in a well known manner in a mould or chill
adapted to receive the said link, and it will be obvious that as the said disc is
cast upon the link at its centre or narrowest part it has a relatively large surface
at c, c in contact with the link so that the possibility of the disc slipping or
becoming loose upon the link is reduced to a minimum.
It is to be understood that links of the chain between the links provided with
discs are constructed in the same manner as the links hereinbefore described this
form of chain running very smoothly over the chain wheels.
In addition to the advantages herein before indicated this form of chain possesses
the further advantage that the distances between the discs can be readily adjusted
to compensate for wear or stretching by taking out or shortening a link without
destroying the uniform appearance of the chain, which is not the case when using
chain the links of which are formed of twisted metal rods as described in the
former patent granted to me.
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 manufacture and use of the improved chain for chain pumps hereinbefore
described and illustrated in the accompanying drawing.
G. F. REDFERN & Co.,
4 South Street, Finsbury, London, Agents for the Applicant.