A New or Improved Method of Manufacturing Metal Wire.
Year: 1891

page_text: Date of Application, 11th Dec., 1891
Complete Specification Left, 9th Sept., 1892-Accepted, 15th Oct., 1892
PROVISIONAL SPECIFICATION.
A New or Improved Method of Manufacturing Metal Wire.
I, ETIENNE VICTOR PRETOT Mechanical Engineer of 126 Boulevard Richard-
Lenoir Paris in the Republic of France do hereby declare the nature of this
invention to be as follows:-
This invention consists in the manufacture of wire of desired form of cross
section by means of a machine adapted to roll out the wire and detach it from a
metal tube in a helicoidal direction.
The shape of section of the wire is obtained by a series of circular grooves in
the rollers these grooves having a shape of section corresponding to that to be
obtained.
of
By placing the end of a tube (which should be made solid drawn or without
solder) between the ends of two rollers having grooves as aforesaid so that the
edge of the tube projects between the rollers for a distance equal to the breadth of
the first groove, and bringing the rollers together by means of screws, the tube will
be carried round in a rotary manner and a slight groove will be made around the
tube inside and outside. If at the same time the tube is placed obliquely with
regard to the axes of the rollers and an advancing movement is given to the tube
proper amount, the grooves will be made in the tube in a helicoidal direction.
The speed of feed of the tube should be such that when the latter has completed
one revolution, the commencement of the groove will arrive exactly opposite to the
next groove in the rollers, the flanges of this groove deepen further the grooves in
the tube. In a similar manner the grooves in the tube are deepened by each
successive groove in the rollers until the strip of metal endwise of the groove is
entirely separated from the body of the tube along the groove and becomes a wire
of the desired shape of section.
Dated this 11th day of December 1891.
HERBERT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION..
A New or Improved Method of Manufacturing Metal Wire.
I ETIENNE VICTOR PRETOT, Mechanical Engineer of 126 Boulevard Richard
Lenoir, Paris in the Republic of France 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:-
This invention consists in the manufacture of wire of desired form of cross
section by means of a machine adapted to roll out the wire and detach it from a
metal tube in a helicoidal direction.
The shape of section of the wire is obtained by a series of circular grooves in
the rollers, these grooves having a shape of section corresponding to that to be
obtained.
By placing the end of a tube (which should be made solid drawn or without
solder) between the ends of two rollers having grooves as aforesaid, so that the
edge of the tube projects between the rollers for a distance equal to the breadth of
the first groove, and bringing the rollers together by means of screws, the tube
will be carried round in a rotary manner, and a slight groove will be made around
the tube inside and outside. If at the same time the tube is placed obliquely with
regard to the axes of the rollers and an advancing movement is given to the tube
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of proper amount, the grooves will be made in the tube in a helicoidal direction.
The speed of feed of the tube should be such that when the latter has completed
one revolution, the commencement of the groove will arrive exactly opposite to
the next groove in the rollers, the flanges of this groove deepen further the grooves
in the tube. In a similar manner the grooves in the tube are deepened' by each
successive groove in the rollers, until the strip of metal endwise of the groove is
entirely separated from the body of the tube along the groove and becomes a wire
of the desired shape of section.
The machine for carrying out this method of making wire is shown in the
annexed sheet of drawings in which Fig. 1 is a longitudinal side elevation. Fig. 2 a
cross section on liue A B Fig. 1. Fig. 3 a plan view partly in section and Fig. 4
an enlarged sectional view of the rollers and metal cylinder introduced between
them.
a al are the two rollers having grooves formed around their ends as shown in
Fig. 4, these grooves e ele² e³ e being provided each with continually increasing
flanges until the last pair of grooves forms a complete circle in section, if the
form of section of the wire to be made is circular, or in other words completes a
separated section of the ultimate form desired, for which form the other grooves,
are but preparatory: The rollers are driven by gear rri po from the fast pulley m
which is fixed on the sleeve n of the wheel o. m' is a loose pulley at the side of
the fast pulley m. The screw 6 with power gear for setting it by hand adjusts the
distance between the rollers a a¹.
The saddle frame which carries the tube to be cut into wire extends in front of:
the rollers a a¹ and is pivoted in a king bolt and is adjusted to the right or left
by adjusting screws g gl and when adjusted is fixed by the set bolts 'h h'."
This adjustment is for the purpose of guiding the tube to be cut to the cutting
rollers so that the latter groove the tube helicoidally as before mentioned. The
saddle frame carries the rotary cylinder i in which the tube rolls and also the two
lateral and parallel cylinders the bearings of which lie in arms 1, 12, 113 adapted
to be extended more or less from the saddle frame according to the diameter of
the tube c operated upon which may be of any size within the limits of the full
and dotted lines in Figs. 1 and 2. Set screws fix the arms l, P, 1, 1, in the required
positions. The rotary movement of the tube c is produced by the rollers cc, but
a positive feed of the tube towards these rollers is effected by gear and shafting j
acting on the screw k which gives a feed to a sleeve carrying a small roller d which
lies against the rear end of the tube c. Some of the gear j may be interchangeable
to adjust the feed according to the diameter of the tube c. The wire which is cut
off the entering end of the tube is carried to any suitable bobbin or reel, not
shown.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is
The method of manufacturing wire of desired form of cross section, by cutting
same helicoidally from the end of a tube substantially in the manner herein
described.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.