Steel Sheets.
Year: 1887

page_text: Date of Application, 21st Mar., 1887
Complete Left, 19th Dec., 1887
Complete Accepted, 20th Jan., 1888
Steel Sheets.
We, JOHN LYSAGHT, Limited, of St. Vincent's Ironworks in the City and County
of Bristol, Galvanized Iron Manufacturers, WILLIAM ROYSE, LYSAGHT, Manager at
the Swan Garden Works of the said Company situated at Horseley Fields, Wolver-
hampton in the County of Stafford, and JAMES LAKIN, foreman at the said Swan
Garden Works, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved process for rolling iron and steel sheets of
very thin gauges (say of 28 B.W.G. and thinner), and has for its object to ensure
greater evenness and regularity of thickness in the sheets, and to reduce the chances
of producing "wasters."
The invention consists in rolling such shecis between, or together with, sheets of
thicker gauge, and thereby obtaining the advantage of having a greater total thickness
of metal passing between the rolls than usual in rolling very thin sheets, and thus
minimising the proportionate effect of any unevenness or irregularity of thickness
due to the rolling, and of obtaining, also, the advantage of the greater body of heat
due to such greater total thickness of metal.
The improved process is capable of considerable variation without departing from
the nature of the invention; but some methods of carrying it out are given below,
by way of example.
According to one method of employing the process :-A sheet to be finished to a.
very thin gauge (say to 28 B.W.G., or thinner) and which has been rolled down to
the usual proportionate extent previously to the last reheating, is laid upon a pair of
sheets to be finished to a thicker gauge, and which are in the same stage of their
manufacture as the thinner sheet. The three thicknesses of sheet are then doubled
over together thus forming a "pack" of six thicknesses, namely, two thicknesses of
the thinner gauge in the middle of four thicknesses of a thicker gauge. The "pack
is heated and rolled to bring the different thicknesses to their desired gauges, the
reduction in thickness being exactly in proportion to the original thicknesses of the
sheets in the "pack." Any slight inequality or unevenness in the rolling is thus
divided proportionately throughout all the thicknesses.
2:

page_text: According to another method, the sheet of thinner gauge may be placed between
the two sheets of thicker gauge, so that when the sheets are doubled over the two
thicknesses of thinner gauge have two thicknesses of thicker gauge between them and
one thickness of thicker gauge outside each of them.
According to a further method, the sheet of thinner gauge may be placed
below the sheets of thicker gauge, so that when the sheets are doubled over there
will be four thicknesses of thicker gauge between the two thicknesses of thinner
gauge which will then form the top and bottom of the "pack," respectively.
According to still further methods, two of the thinner sheets may be "packed"
with one thicker sheet, in which case the thicker sheet takes the place of the thinner
sheet in either of the previous modifications, or there may be one thin and one thick
sheet only in such "pack."
21
By the employment of this invention, very thin gauges of iron and steel sheets may
be rolled with great regularity of thickness and with very little liability of "wasters
resulting.
STEPHEN WATKINS,
Wolverhampton and Walsall,
Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Rolling Very Thin Gauges of Iron and
Steel Sheets.
We, JOHN LYSAGHT, Limited, of St. Vincent's Ironworks, in the City and County
of Bristol, Galvanized Iron Manufacturers, WILLIAM ROYSE LYSAGHT, Manager at
the Swan Garden Works of the said Company situated at Horseley Fields, Wolver-
hampton in the County of Stafford, and JAMES LAKIN, foreman at the said Swan
Garden Works, 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 (that is to say) :-
:-
This invention relates to an improved process for rolling iron and steel sheets of
very thin gauges (say of 28 B.W.G. and thinner) and has for its object to ensure
greater evenness and regularity of thickness in the sheets, and to reduce the chances
of producing "wasters."
The invention consists in rolling such sheets between, or together with, sheets of
thicker gauge and thereby obtaining the advantage of having a greater total thickness
of metal passing between the rolls than usual in rolling very thin sheets, and thus
minimising the proportionate effect of any unevenness or irregularity of thickness
due to the rolling, and of obtaining, also, the advantage of the greater body of heat
due to such greater total thickness of metal.
The improved process is capable of considerable variation without departing from
the nature of the invention; but some methods of carrying it out are given below,
by way of example.
According to one method of employing the process :-A sheet to be finished to a
very thin gauge (say to 28 B.W.G., or thinner) and which has been rolled down to
the usual proportionate extent previously to the last reheating, is laid upon a pair of
sheets to be finished to a thicker gauge, and which are in the same stage of their
manufacture as the thinner sheet. The three thicknesses of sheet are then doubled
over together thus forming a "pack" of six thicknesses, namely, two thicknesses of
the thinner gauge in the middle of four thicknesses of a thicker gauge. The "pack
is heated and rolled to bring the different thicknesses to their desired gauges, the
reduction in thickness being exactly in proportion to the original thickness of the
sheets in the "pack." Any slight inequality or unevenness in the rolling is thus
divided proportionately throughout all the thicknesses.
"
According to another method, the sheet of thinner gauge may be placed between
the two sheets of thicker gauge, so that when the sheets are doubled over the two
thicknesses of thinner gauge have two thicknesses of thicker gauge between them and
one thickness of thicker gauge outside each of them.
According to a further method, the sheet of thinner gauge may be placed below
the sheets of thicker gauge, so that when the sheets are doubled over there will be
four thicknesses of thicker gauge between the two thicknesses of thinner gauge which
will then form the top and bottom of the "pack," respectively.

page_text: According to still further methods, two of the thinner sheets may be "packed" with
one thicker sheet, in which case the thicker sheet takes the place of the thinner
sheet in either of the previous modifications, or there may be one thin and one thick
sheet only in such "pack."
It will be obvious that there is no exact limit to the number of thin and thick sheets
which may be rolled together in the manner above described.
By the employment of this invention, very thin gauges of iron and steel sheets
may be rolled with great regularity of thickness and with very little liability of
"wasters" resulting.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is -
Rolling very thin gauges of iron and steel sheets between or together with sheets
of thicker gauge, substantially as described for the purpose set forth.
Dated the 17th day of December 1887.
STEPHEN WATKINS,
Wolverhampton and Walsall,
Agent for the Applicants.
STEPHEN WATKINS,
Wolverhampton and Walsall,
Agent for the Applicants.