Year: 1888

page_text: Date of Application, 8th Feb., 1888
Complete Specification Left, 8th Nov., 1888
Complete Specification Accepted, 14th Dec., 1889
I, JOHN LESLIE CLOUDSLEY of Smith Square Works, Westminster, Gas Metor
Manufacturer, do heroby declare the nature of this invention to be as follows:-
This invention has for its object the construction of dry gas meters in such a
manner as to ensure under all ordinary conditions, greater uniformity of capacity,
and accuracy in the measurement of the gas passed through them, than in those
hitherto used.
I make the diaphragm of each measuring chamber rectangular and construct them
as follows. Each diaphragm is made of four pieces of leather having six sides, two
of which sides are longer than the others, and folded longitudinally along their centres.
The ends of each piece of leather are sewed to the ends of the adjacent ones, and the
edges of each piece of leather are attached to rims, the rims being fixed to four
pairs of hinged plates. These plates are made to form part of the flexible diaphragm,
sufficient space being left between the ends of the plates to allow of their movement.
On the outside of the leather are fitted cover plates corresponding in shape but
somewhat loss in size than the inner plates, one or more rivets being used to join each
outer plate to its inner plate, tho leather being between. The rims on one side of
the diaphragm are fixed to the division plate of the meter, while the other rims are
attached to a central plate so as to complete the chamber, the chamber on the other
side of the division pluto being made in exactly the same manner.
By these means, the advantages claimed for meters so constructed are ensured.
W. H. BENNETT,
Agent for the Applicant.

page_text: I, JOHN LESLIE CLOUDSLEY of Smith Square Works, Westininster, Gas Meter
Manufacturer, 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 :-
This invention has for its object the construction of dry gas meters in such a
manner as to ensure under all ordinary conditions, greater uniformity of capacity,
and accuracy in the measurement of the gas passed through them than in those
hitherto used.
In order that the invention may be easily understood drawings are attached hereto
of which the following is a description Fig. 1 is a front elevation of the metal
framework, formed of four pairs of hinged plates, used to support the flexible leather
diaphragm. Fig. 2 is an end elevation of Fig. 1. Fig. 3 is a thin metal frame, the
use of which is subsequently described. Fig. 4 is the shape of each piece of leather,
and Fig. 5 is the shape of the same when folded longitudinally. Fig. 6 is the shape
of two of the metal cover plates, and Fig. 7 is the shape of the other two metal cover
plates. Fig. 8 is a front elevation of the diaphragm when the leathor is attached,
and having its cover plates and central plate complete, and Fig. 9 is an end
elevation of Fig. 8.
I make the diaphragm of each measuring chamber rectangular and construct them
as follows. I make a framework of four pairs of plates lettered A, B, C and D,
Fig. 1, each pair being hinged together at S, T, U and V or other suitable points,
the corresponding plates on the other side, some of which are scen in Fig. 2 being
lettered E, F and G. Each of these plates is hinged to a metal rim Hat I, J, K
and L. The flexible part of each diaphragm is made of four pieces of leather Y of
the form shown in Fig. 4. These are folded longitudinally and assume the form
drawn in Fig. 5, and envelope each pair of plates. Each of the pieces of leather is
attached to the adjacent one by sewing their shorter sides together, two of them being
somewhat longer than the others so as to allow of overlapping and a seam being made,
when the frame work shown in Fig. 1 is enveloped by the leather, the frame exhibited
in Fig. 3 is passed over the projecting part or flange W of the rim H Fig. 1, but
shown more distinctly in Fig. 2, when the leather is turned over the inner edge of
the frame, and the flange is then bent down all round, the leather being tightly
compressed between the rim H and its flange W, the frame Fig. 3 being inserted
between them to ensure a sound gas tight joint. On the outside of the leather are
fitted cover plates M, N, O and P, Fig. 6, 7 and 8, corresponding in shape, but some-
what less in size than the under plates A, B, C and D, two or more rivets Qbeing
used to join each cover plate to the under plate, the leather being between. These
cover plates have their edges curved slightly outwards. The rim H on one side of
the diaphragm is fixed to the division plate of the meter, while the other rim is fixed
to a central metal plate R Fig. 8, so as to complete one measuring chamber, the other
measuring chamber on the opposite side of the division plate being made in exactly
the same manner.

page_text: In constructing these diaphragms care is taken that wherever there is a bend in
the leather, the said leather shall not be subject to a sharp or cutting edge, the metal
plates being well rounded at their hinged edges to prevent such an occurrence.
The
forms of the plates A, B, C and D, may be slightly varied as occasion dictates.
By these means the advantages claimed for ineters with diaphragms so constructed
are ensured.
Having now particularly described and ascertained the nature of this invention,
and in what manner the same is to be performed I declare that what I claim is,
The construction of the diaphragms of dry gas meters as heroin described and
shown on the drawings.