Year: 1896

page_text: I, SAMUEL BRASSINGTON BAMFORD, of the Firm of Henry Bamford & Sons,
of Leighton Iron Works, Uttoxeter, in the County of Stafford, Agricultural
Engineers, do hereby declare the nature of this invention to be as follows:-
My invention relates to chain pumps.
Hitherto in manufacturing chain pumps considerable difficulty has been
experienced in ensuring that the distances between the several discs upon the
chain shall be uniform in order that the positions of the said discs shall coincide
with the positions of the slots in the chain wheel. This difficulty is chiefly due to
the fact that it is almost impossible to ensure that the links between the discs shall
be of uniform length by reason of the lengthening which sometimes takes place in
the welding.
According to this invention I make use of a chain which is not welded but in
which the links are formed by doubling the two end portions of a bar upon itself
and bending or curling the ends of these doubled portions around the other
portion of the said bar, the two bent or curled ends being one behind the other
side by side. Links constructed in this manner can be made of uniform length
as there is no welding and the two ends or eyes may be at right angles or in the
same plane.
The links to which the discs are to be applied are placed in moulds or chills so
that the central portions with the bends or curls will have the metal cast around
them.
1, SAMUEL BRASSINGTON BAMFORD, of the Firm of Henry Bamford & Sons,
of Leighton Iron Works, Uttoxeter, in the County of Stafford, Agricultural
Engineers, 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 chain pumps.
Hitherto in manufacturing chain pumps considerable difficulty has been
experienced in ensuring that the distances between the several discs upon the chain
shall be uniform in order that the positions of the said discs shall coincide with the
positions of the slots in the chain wheel. This difficulty is chiefly due to the fact
that it is almost impossible to ensure that the links between the discs shall be of

page_text: uniform length by reason of the lengthening which sometimes takes place in the
welding.
According to this invention I make use of a chain which is not welded but in
which the links are formed by, doubling the two end portions of a bar upon itself
and bending or curling the ends of these doubled portions around the other
portion of the said bar, the two bent or curled ends being one behind the other.
Links constructed in this manner can be made of uniform length as there is
no welding and the two ends or eyes may be at right angles or in the same
plane.
The links to which the discs are to be applied are placed in moulds or
chills so that the central portions with the bends or curls will have the metal
cast around them.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawings, in which :-
Figure 1 is a side view of one of the links of the chain which I use in carrying
out my invention :
Figure 2 is a similar view of the link turned partly round; and,
Figure 3 is a view of the link in a position at right angles to that shewn in
Figure 1:
Figure 4 is a section on the line 4-4 Figure 1:
Figure 5 is a view of a link with a disc cast thereon.
Figure 6 is a side elevation of a mould or chill for use in applying the discs to
the liuks.
Figure 7 is a plan view of the bottom half of the said mould or chill; and,
Figure 8 is an underside view of the two parts forming the top half:
Figure 9 is a side elevation of the bottom half.
Each link is formed of a piece of bar or rod the end portions a, b of which are
bent towards each other so that the euds a¹, b' can be bent around the central
portion of the bar to lock them one behind the other in a manner which will be
clearly understood by reference to Figures 1 to 4 of the drawings.
Around these bent ends is cast the ball or disc c as shewn in Figure 5 the
metal completely covering the bent portions a, b so that only two loops project
from the said disc.
The disc is advantageously applied in a chill or mould of the kind shewn in
Figures 6 to 9 and which has one bottom part d and a divided top part e. These
parts have recesses f, f formed in them, to receive the loop portions of a link, and
recesses g, g to form the disc. The runner hole is formed partly in each portion
of the top half of the mould.
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. In a chain pump the lifting chain with discs thereon constructed substantially
as herein before described and illustrated in the accompanying drawings.
2. The manufacture of lifting chains with discs for chain pumps, substantially as
hereinbefore described.
D3
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Ageuts for the Applicant.