A NEW OR IMPROVED " MANUFACTURE OF LONGITUDINALLY CORRUGATED STEEL AND IRON BARS HOOPS AND PLATES
Year: 1884

page_text: We JAMES FREDERICK FAIRLEY and ALFRED FAIRLEY both of N° 9 and
10 Shadwell Street, Birmingham, in the County of Warwick, Steel Manufacturers,
do hereby declare the nature of the said invention for A NEW OR IMPROVED
"
MANUFACTURE OF LONGITUDINALLY CORRUGATED STEEL AND IRON BARS HOOPS
AND PLATES" to be as follows:-
Bars hoops and plates of steel and iron are ordinarily corrugated either by
the use of pressing tools worked in a stamp or press being made to operate on
successive portions of the bars, hoops or plates; or by the use of rolls having flut s
or corrugations parallel to their axes. In the latter case the corrugations cannot
exceed the length of the rolls and consequently only bars, hoops or plates can be
made by this process of very limited length in the direction in which the corrugations
are situated. In these the ordinary methods of manufacture, the corrugated bar,
hoop or plate is made from a plain bar, hoop or plate, the thickness of which is not
changed by the corrugating process, the said bar, hoop or plate must have a brea ith
when in its plain or uncorrugated state considerably greater than the breadth of
the corrugated bar, hoop or plate to be produced. In these methods of manufacture,
great strain is put upon the metal and its strength is thereby diminished.
In manufacturing longitudinally corrugated steel and iron bars, hoops and plates,
according to this invention, we take an ingot, billet or bar of steel or iron and
produce therefrom directly by rolling, a longitudinally corrugated bar, hoop or plate,
instead of first producing from the ingot billet or bar a plain bar, hoop or plate and
afterwards corrugating it longitudinally by rolls or dies. The ingot billet or bar
on which we operate by rolling, has a thickness considerably greater than that of
the corrugated bar, hoop or plate to be produced and is not less in thickness than
the space included between two parallel planes enclosing and touching the corrugated
bar, hoop or plate to be produced.
Thus if a corrugated bar, hoop or plate of the kind to be produced be laid on a
table or flat surface and the convex summits of the corrugations are situated an
inch above the said table or surface, the ingot, billet or bar on which we operate
has a thickness of at least one inch.
The said ingot, billet or bar may have a breadth less than that of the corrugated
bar, hoop or plate to be produced.

page_text: We operate upon the heated steel or iron ingot, billet or bar by means of a pair
of rolls having in them corrugations similar to those to be produced in the bar,
hoop or plate, the said corrugations in the rolls being in planes at right angles to
the axes of the rolls. By operating on the heated ingot, billet or bar by means
of the said rolls, the said ingot, billet or bar is corrugated in-the direction of its
length, its length is largely increased and its breadth is somewhat increased, unless
prevented by flanges on the rolls.
By the method of manufacture constituting this invention all portions of the
metal are subjected while in a heated state to the same amount of pressure and
the strain on the metal inseparable from the ordinary method of manufacture is
avoided.
The corrugated bar, hoop or plate being produced direct from the ingot, billet or
bar great economy in manufacture results, and bars, hoops and plates having
longitudinal corrugations can be readily produced of any required length.

page_text: We JAMES FREDERICK FAIRLEY and ALFRED FAIRLEY both of Nos 9 and
10 Shadwell Street, Birmingham in the County of Warwick, Steel Manufacturers
do hereby declare the nature of the said Invention for "A NEW OR IMPROVED
MANUFACTURE OF LONGITUDINALLY CORRUGATED STEEL AND IRON BARS, HOOPS
AND PLATES" and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
Bars, hoops and plates of steel and iron are ordinarily corrugated either by
the use of pressing tools worked in a stamp or press being made to operate on
successive portions of the bars, hoops or plates, or by the use of rolls having flutes
or corrugations parallel to their axes. In the latter case the corrugations cannot
exceed the length of the rolls and consequently only bars, hoops or plates can be
made by this process of very limited length in the direction in which the corrugations
are situated. In these the ordinary methods of manufacture the corrugated bar,
hoop or plate is made from a plain bar hoop or plate the thickness of which is not
changed by the corrugating process; the said bar hoop or plate must have a breadth
when in its plain or uncorrugated state considerably greater than the breadth of
the corrugated bar, hoop or plate to be produced. In these methods of manufacture,
great strain is put upon the metal and its strength is thereby diminished.
In manufacturing longitudinally corrugated steel and iron bars, hoops and plates
according to this invention, we take an ingot, billet or bar of steel or iron and
produce therefrom directly by rolling a longitudinally corrugated bar, hoop or plate
instead of first producing from the ingot billet or bar a plain bar hoop or plate and
afterwards corrugating it longitudinally by rolls or dies. The ingot, billet or bar
on which we operate by rolling has a thickness considerably greater than that of
the corrugated bar, hoop or plate to be produced and is not less in thickness than
the space included between two parallel planes enclosing and touching the corrugated
bar, hoop or plate to be produced.
Thus if a corrugated bar hoop or plate of the kind to be produced be laid on a
table or flat surface and the convex summits of the corrugations are situated an
inch above the said table or surface, the ingot, billet or bar on which we operate
has a thickness of at least one inch.
The said ingot, billet or bar may have a breadth less than that of the corrugated
bar hoop or plate to be produced.
For the purpose of illustration we have represented in Figure 1 of the accom-
panying Drawing a plain bar or billet which we use in the manufacture of the
longitudinally corrugated bar represented in Figure 2 the said bar Figure 2 having
two parallel corrugations. The plain bar or billet Figure 1 has, as represented, a
thickness considerably greater than that of the corrugated bar Figure 2. For the
production of the corrugated bar Figure 2 we use a plain bar or billet Figure 1
which has a thickness equal to the space included between two parallel planes
enclosing and touching the convex suminits of the corrugations of the bar Figure 2
as indicated by the dotted lines extending from the bar or billet Figure 1 to the
corrugated bar Figure 2.
We operate upon the heated steel or iron ingot, billet or bar Figure 1 by means
of a pair of rolls having in them corrugations similar to those to be produced in
the bar, hoop or plate the said corrugations in the rolls being in planes at right
angles to the axes of the rolls. By operating on the heated ingot, billet or bar
Figure 1 by means of the said rolls the said ingot, billet or bar is corrugated in the

page_text: direction of its length, its length is largely increased and its breadth is somewhat
increased unless prevented by flanges on the rolls and the longitudinally corrugated
bar Figure 2 is produced.
In forming a corrugated plate of greater width than the bar Figure 2, in which
plate the corrugations are required to have the thickness represented in Figure 2,
we use a plain bar or billet having the same thickness as that represented in
Figure 1 but of a breadth about equal to the breadth of the corrugated plate to
be produced.
More than two longitudinal parallel corrugations may be made in the bar hoop
or plate but the number and size of the corrugations depend upon the purpose to
which it is to be applied.
By the method of manufacture constituting this invention all portions of the
metal are subjected while in a heated state to the saine amount of pressure and
the strain on the inetal inseparable from the ordinary method of manufacture is
avoided.
The corrugated bar hoop or plate being produced direct from the ingot, billet
or bar great economy in manufacture results and bars, hoops and plates having
longitudinal corrugations can be readily produced of any required length, breadth
and thickness.
We have not thought it necessary either to represent or describe in detail the
pair of rolls which we employ as the said rolls are of the kind and have the same
action as rolls used for rolling merchant bars and plates and for similar purposes
excepting that the grooves in the rolls have a figure suitable to produce the
longitudinally corrugated bars, hoops or plates.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed We declare that what
We claim is
Manufacturing steel and iron bars hoops and plates having two or more parallel
longitudinal corrugations by rolling them direct from the ingot, billet or bar as
herein before described and illustrated in the accompanying Drawing; that is to
say taking an ingot, billet or bar having a thickness considerably greater than that
of the corrugated bar, hoop or plate to be produced as herein before indicated and
operating upon the heated ingot, billet or bar by means of a pair of rolls having in
them corrugations similar to those to be produced in the bar, hoop or plate the said
corrugations in the rolls being in planes at right angles to the axes of the rolls
substantially as described and illustrated.
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