IMPROVEMENTS. IN APPARATUS FOR ROLLING WIRE AND BARS OF CHANNEL STAR AND SIMILAR " SECTIONS
Year: 1883

page_text: LETTERS PATENT to Gerard Wenzeslaus von Nawrocki, Proprietor of the firm
of J Brandt & G W v Nawrocki, Patent Solicitor and Civil Engineer of,
124 Leipzigerstrasse Berlin Germany for an Invention of "IMPROVEMENTS. IN
APPARATUS FOR ROLLING WIRE AND BARS OF CHANNEL STAR AND SIMILAR
"
SECTIONS a communication from Schmidt Brothers of Schwelm Germany
PROVISIONAL SPECIFICATION left by the said Gerard Wenzeslaus von.
Nawrocki at the Office of the Commissioners of Patents on the 27th September
1883.
GERARD WENZESLAUS VON NAWROCKI, Proprietor of the firm of J Brandt & G
Wv Nawrocki, Patent Solicitor and Civil Engineer of 124 Leipzigerstrasse, Berlin
Germany "IMPROVEMENTS IN APPARATUS FOR ROLLING WIRE AND BARS OF
CHANNEL STAR AND SIMILAR SECTIONS "
(A. communication from Schmidt Brothers
of Schwelm Germany)
The rolls for producing four cornered channel section wire or bars are four in
number arranged with their axes at right angles to each other and each formed
with wedge shaped outer part or profile not however with a sharp but with a blunt
or convex rounded edge. During the rolling action the rolls approach each other
so far as is required for forming the channelled iron or other metal wire or bar, the
convex rounded edges forming the channels in the four sides.
The rolls are driven by friction by the wire being drawn through it or in other
well known manner.
In a similar manner hexagon channelled sections are produced by the employ-
ment of five such rollers placed at an angle of 72° to each other
It is obvious that other similar sections may be produced by suitably altering
the profile of the outer part of the roller. Thus for instance by forming the same
with two flat faces meeting at a very obtuse angle a four or five cornered star
section is produced.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Gerard Wenzeslaus von Nawrocki in the Patent Office on the
27th March 1884.
GERARD WENZESLAUS VON NAWROCKI, Proprietor of the firm of J. Brandt & G.
Wv Nawrocki, Patent Solicitor and Civil Engineer of 124 Leipzigerstrasse, Berlin
Germany "IMPROVEMENTS IN APPARATUS FOR ROLLING WIRE AND BARS OF
CHANNEL STAR AND SIMILAR SECTIONS" (A communication from Schmidt Brothers
of Schwelm Germany)
The rolls for producing four cornered channel section wire or bars are four in
number arranged with their axes at right angles to each other and each formed
with wedge shaped outer part or profile not however with a sharp but with a
blunt or convex rounded edge. During the rolling action the rolls approach each
other so far as is required for forming the channelled iron or other metal wire or
bar, the convex rounded edges forming the channels in the four sides.
The rolls are driven by friction by the wire being drawn through or in other well
known manner.
In a similar manner pentagon channelled sections are produced by the employ-
ment of five such rollers placed at an angle of 72° to each other.
And in order that this invention may be more fully understood I will now
describe the same with reference to the accompanying drawings of which Figure 1
is an elevation view of an arrangement of four rolls for rolling a four cornered
channel section; Figure 2 à similar view of five rolls for rolling a five cornered
section; Figure 3 another profile or form of rolls for producing four cornered star
section, and Figure 4 a profile of a roll for producing five cornered star section.
In Figure 1 the four rolls A are at their outer part a formed convex and they
all approach each other so much with their flat parts b as is necessary for the
required size or section to be produced.
In Figure 2 the five rolls A are similarly formed at their parts a and b
It is obvious that other similar sections may be produced. by suitably altering
the profile of the outer part of the roller. Thus for instance by forming the same
with two flat faces meeting at a very obtuse angle a four or five cornered star
section produced.
This form is illustrated by Figure 3 where the rolls are formed with two converging
flat faces a¹, a³ forming an obtuse angle and with their lateral faces b approaching
each other as much as required for producing the star section shown.
In Figure 4 again is shown part of one of five rolls for producing a five cornered
star section as shown
And having thus described and ascertained the nature of this invention I declare
that I claim as the invention communicated to me.
First The combination and application of four rolls having their middle part a
formed convex and their converging side faces b flat for the purpose of producing
four cornered channel sections all substantially as set forth.
Second The combination and application of five rolls having their middle part a
formed convex and their converging side faces b flat for the purpose of producing
five cornered channel sections all substantially as set forth.

page_text: Third: The combination and application of four or five rolls having flat converging
faces a¹, a and side faces b for the purpose of producing four or five cornered star
sections all substantially as set forth.
In witness whereof I the said Gerard Wenzeslaus von Nawrocki have hereunto
set
my hand and seal this Twentysecond day of March in the year of our Lord
One thousand eight hundred and eighty four
GERARD WENZESLAUS VON NAWROCKI (L.S.)