Improvements in or relating to the Manufacture and Construction of Galvanized Cisterns and Tanks.
Year: 1888

page_text: Date of Application, 25th Apr, 1888
Complete Specification Left, 27th Sept., 1888
Complete, Specification Accepted, 2nd Nov., 1888
Improvements in or relating to the Manufacture and Construction of
Galvanized Cisterns and Tanks.
I, EDWARD ALBERT DAVIES, of The Crown Galvanizing Works, Wolverhampton in
the County of Stafford, galvanized iron manufacturer, do hereby declare the nature
of this invention to be as follows:-
In the manufacture of galvanized cisterns and tanks it is necessary to construct
them first as ungalvanized and then to pickle them and dip them in the galvanizing
bath in order to give them the coating of galvanizing metal, by which means all the
joints are thoroughly protected with such metal; but it is found that the sheets or
thin plates forming the sides, bottoms, and (in the case of closed tanks) the tops, have
a tendency to buckle or warp under the galvanizing process, and consequently to start
the seams which are troublesome to make watertight afterwards and are therefore
liable to leak in uso.
Now, the object of this invention is to so prepare the sheets or plates as to stiffen or
strengthen them against the above tendency to buckle or warp; and this is accomplished,
according to this invention, by buckling or raising parts of the surfaces of the plates
A convenient
previously to using them in the construction of the cisterns or tanks.
method of carrying out this invention is to form a flute in each sheet or plate a short
distance inward from each edge thereof, the two flutes thus formed in one direction
across the sheet or plate preferably curving round into the corresponding flutes lying
in the other direction of the sheet or plate, thus making a continuous flute. When a
sheet, or plate is to form two or more sides of a cistern or tank in one unjointed piece,
by being bent to form one or more of the corners, the part thereof for each side is
fluted as if it consisted of a separate sheet or plate.
The invention may be considerably modified, the object being by means of a buckled
or raised part or parts to give strength to the sheet or plate in all directions against
the tendency of the galvanizing process to buckle or warp it, and to effect this
strengthening in such a manner as will not interfere with the rivetting or seaming of
the sheet or plate.
+000
STEPHEN WATKINS,
Wolverhampton and Walsall,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in or relating to the Manufacture and Construction of
Galvanized Cisterns and Tanks.
I, EDWARD ALBERT DAVIES, of The Crown Galvanizing Works, Wolverhampton in
the County of Stafford, galvanized iron manufacturer, do hereby declare the nature of
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 :-
In the manufacture of galvanized cisterns and tanks it is necessary to construct
them first as ungalvanized and then to pickle them and dip them in the galvanizing
bath in order to give them the coating of galvanized metal, by which means all the
joints are thoroughly protected with such metal, but it is found that the sheets or thin
plates forming the sides, bottoms, and (in the case of closed tanks) the tops, have
a. tendency to buckle or warp under the galvanizing process and consequently to
start the seams which are troublesome to make watertight afterwards and are there-
fore liable to leak in use.
Now, the object of this invention is to so prepare the sheets or plates as to stiffen or
strengthen them against the above tendency to buckle or warp; and this is accomplished,
according to this invention, by buckling or raising parts of the surfaces of the sheets
or plates préviously to using them in the construction of the cisterns or tanks, such
buckling or raising being effected in a manner to leave a plain margin on all sides of
each sheet or plate to readily admit of its connection at a joint, or with an angle iron
at the top.
A convenient method of carrying out this invention is illustrated by the drawings
herewith, of which figure 1 is a vertical section through the centre of an open-topped
tank and figure 2 is a sectional plan taken on line x x of figure 1. Each sheet
forming a side or bottom of the tank (and also, if desired, the sheet forming the
top, in cases in which a top is used) has Hutes a pressed or stamped therein, as shewn,
previously to the sheets being seamed or rivetted together to form the tank. The
Hlutes are, preferably, convex at their outer face at the sides of the tank and at their
inner face at the bottom of the tank, but this is not essential as they may be pressed
either outwardly or inwardly in either case. Two of the flutes run in one direction
partly across a plate and two in a direction transversely thereto, and the flutes running
in one direction mitre into the flutes running in the other direction thus giving the
appearance of a panel upon each sheet or plate. Each sheet or plate is thus
strengthened in both directions, and, thus in effect in all directions transversely.
The Hutes may be rounded into one another at the corners, if preferred, instead of
being mitred, and in either case a continuous, flute is formed; or in lieu of forming.
the flutes so
to give the appearance of a square panel or panel with rounded corners,
an annular flute may be formed concentric with each sheet or plate simply as a plain
projecting ring.
so as
When a sheet or plate is to form two or more sides, or one or more sides and the
bottom or top, of a cistern or tank, in one unjointed piece, by being bent to form one or

page_text: more of the corners of such cistern or tank instead of being seamed or jointed at
each corner, the part thereof for each side, or for each side and the bottom or top, is
fluted as if it consisted of a separate sheet or plate.
The invention may be considerably modified, the object being by means of a buckled
or raised part or parts to give strength to the sheet or plate in all directions against
the tendency of the galvanizing process to buckle or warp it, and to effect this
strengthening in such a manner as will not interfere with the rivetting or seaming
of the sheet or plate.
The employment of this invention permits of the cisterns and tanks being made of
thinner metal than heretofore in proportion to the size of the tanks or cisterns, and
thus materially lessens the cost of production.
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. Stiffening or strengthening the sheets or plates employed in making galvanized
cisterns and tanks, against any tendency to buckle or warp under the galvanizing
process, by buckling or raising parts of the surfaces of such sheets or plates previously
to using them in the construction of the cisterns or tanks, such buckling or raising
being effected in a manner to leave a plain margin on all sides of each sheet or plate,
substantially as described.
2. Stiffening or strengthening the sheets or plates employed in making galvanized
cisterns and tanks, against any tendency to buckle or warp under the galvanizing
process, by pressing or stamping flutes in such plates, previously to using them in the
construction of the cisterns or tanks, but so as to leave a plain margin on all sides of each
sheet or plate, and with some of the flutes running in one direction across the sheets or
plates and the other flutes running in a direction at right angles thereto, or approxi-
mately so, or with the flutes each formed as a ring so as to be concentric with the
side, bottom, or top, as the caso may be, of the cistern, or tank, 'substantially
as described.
3. Stiffening or strengthening the sheets or plates employed in making galvanized
cisterns and tanks, against any tendency to buckle or warp under the galvanizing
process previouly to using them in the construction of the cisterns or tanks, sub-
stantially as described and shewn by the drawings herewith.
Dated this 25th day of September 1888.
STEPHEN WATKINS,
Wolverhampton and Walsall,
Agent for the Applicant.