Improvements in the Manufacture of Metal Rods and Bars, applicable for Use as or in the Formation of Twist Drills and other like Cutting Tools, Palisading, Railings, and other Articles.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Metal Rods and Bars,
applicable for Use as or in the Formation of Twist Drills
and other like Cutting Tools, Palisading, Railings, and other
Articles.
I, WILLIAM LOCKWOOD, of City Standard Piston Works, Bramall Lane,
Sheffield, Yorkshire, Engineer, do hereby declare the nature of the said invention
to be as follows:-
This invention relates to a new article of manufacture, applicable for use as or
in the formation of miners' coal drills and other twist drills, augurs and other like
cutting tools, or as or in the formation of palisading, railings, coal-screens and other
articles of utility or ornament where a cutting edge is not required.
The new article of manufacture consists of a mechanically-twisted rolled bar of
steel, iron or other metal, of rectangular or flat-sided section, the twisting being
effected immediately subsequent to the rolling of the bar and in consequence of
the action of the rolls forcing the bar, as it finally issues from the rolls, between
or through angularly disposed guides, dies or a rifled wortle which cause or causes
the rolled bar, while still hot, to assume the desired twist with regularity and at
the rate of production of the rolled bar.
When desiring to use such twisted rolled bar as or in the formation of an augur
or other like cutting tool, I remove the scale from and grind both sides of the
twisted rolled bar simultaneously by means of rotary grinders simultaneously
working on both faces of the bar with their axes in alignment with that of the bar,
twisting the bar in accordance with the helicality of its twist as it is fed between
the grinders. I can also simultaneously grind the peripheral edge of the twisted
rolled bar.
I am aware that twisted rolled bars of rectangular section have hitherto been
produced by rolling the bar to said section, and then reheating the bar and twisting
it by hand, but this process is exceedingly slow, and the helicality of the product is
very uneven, so much so that the product cannot be used as or in the formation
of twist drills, augurs and other like cutting tools:-these being disadvantages
which, amongst others, the said new article of manufacture is intended to remedy.
Dated this 5th day of December 1895.
DAY, DAVIES & HUNT,
321 High Holborn, London, W.C., Agents for the Applicant.

page_text: Improvements in the Manufacture of Metal Rods and Bars,
applicable for Use as or in the Formation of Twist Drills
and other like Cutting Tools, Palisading, Railings, and other
Articles.
I, WILLIAM LOCKWOOD, of City Standard Piston Works, Bramall Lane,
Sheffield, Yorkshire, Engineer, do hereby declare the nature of the said 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 relates to an improvement in the manufacture of twisted metal
bars, whereby I obtain a new article of manufacture applicable for use as or in
the formation of miners' coal drills and other twist drills, augurs and other like
cutting tools, or for use as or in the formation of palisading, railings, coal screens and
other articles of utility or ornament where a cutting edge is not required.
The new article of manufacture consists of a mechanically twisted rolled bar of
steel, iron or other metal, of rectangular or flat-sided section, the twisting being
effected immediately subsequent to the rolling of the bar, at the same heating, and
in consequence of the action of the rolls forcing the bar, as it issues from the rolls,
between or through angularly-disposed guides, dies or a rifled wortle, which cause
or causes the rolled bar, while still hot, to assume the desired twist with regularity
and at the rate of production of the rolled bar.
On the accompanying drawings: Fig. 1, represents, in sectional elevation, on the
line C, D, Fig. 2, a pair of rolls a, and, in elevation, the farther one b, of a pair of
dies b, bx, (Fig. 2,) such as may be employed in producing the rolled mechanically-
twisted bar c, the near die 6x, shown in Fig. 2, being removed in order to represent
the bar C, in process of manufacture. Fig. 5, represents a like view of the die b,
apart from the rolls and with the bar c, removed. The die-holders and other
necessary parts or attachments are not shown on the drawings, as they may be of
any usual kind. Fig. 2, represents a plan of Fig. 1, showing the pair of dies b, bx,
in operative position. They are adapted to separate laterally from their meeting
faces, which, as regards the entrance end of the dies, are in coincident planes,
represented by the dotted line d, to d¹, Fig. 2, both above and below the forming
groove of the dies, and, as regards the exit end of the dies, are in different planes,
represented by the dotted lines d', to e, and d', to e¹, Fig. 2, respectively above and
below such forming groove, so as to break joint at such parts. But the exact
formation of the dies is not material to the invention and forms no part thereof, it
only being essential that they should be so formed as to give the required degree
of helicality to the rolled bar c, as the latter is forced by the rolls a, therethrough.
Fig. 3, represents a section of the rolled bar at the gate a', of the rolls, on the
line A, B, Fig. 1. And Fig. 4, represents a sectional end elevation of the rolled
bar, after it has been mechanically twisted by being forced by the rolls through the
dies.
When desiring to use such twisted rolled bar as, or in the formation of, an augur
or other like cutting tool, I remove the scale from and grind both sides of the
twisted rolled bar simultaneously, by means of rotary grinders simultaneously
working on both faces of the bar, twisting the bar, in accordance with the
helicality of the twist, as it is fed between the grinders. I can also, by suitably
arranged rotary grinders or cutters, simultaneously grind the peripheral edges of
the twisted rolled bar. The grinding and cutting apparatus is not claimed as
forming any part of the invention.
I am aware that twisted rolled bars of rectangular section have hitherto been

page_text: produced by rolling the bar to said section and then reheating the bar and
twisting it by hand, but this process is exceedingly slow, and the helicality of the
product is very uneven, so much so that the product cannot be used as or in the
formation of twist drills, augurs and other like cutting tools: these being
disadvantages, which, amongst others, the said new article of manufacture is
intended to remedy.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what [
claim is :-
1. In the manufacture of twisted metal bars, rolling a bar of rectangular or
flat-sided section, and, at the same heating, and by the operation of the rolling
mills, forcing the bar between or through angularly disposed guides, dies or a
rifled wortle, so as to cause the bar, immediately subsequent to being rolled to its
flat-sided section, to assume the desired twist or helicality with regularity and at
the rate of production of the rolled bar, as set forth.
2. A new article of manufacture, applicable for use as or in the formation of
cutting tools or of non-cutting articles of utility or ornament, consisting of a
mechanically-twisted rolled bar of steel, iron or other metal of rectangular or
flat-sided section, which, at the same heating, is firstly rolled to its flat-sided
section in a continuous plane, and is then, by the operation of the rolling mills
forcing it between or through angularly-disposed guides, dies or a rifled wortle,
immediately caused to assume the desired twist or helicality according to its
intended use.
DAY, DAVIES & HUNT,
Chartered Patent Agents,
321, High Holborn, London, W.C., Agents for the Applicant.