An Improved Manufacture of Tubular Metal Lances.
Year: 1888

page_text: Date of Application, 23rd Oct., 1888:
Complete Specification Left, 3rd July, 1889-Accepted, 3rd Aug.,
1889
PROVISIONAL SPECIFICATION.
An Improved Manufacture of Tubular Metal Lances.
I, WILHELM LORENZ of No. 44 Westendstrasse of Karlsruhe in the Grand-
Duchy of Baden, German Empire, Engineer and Manufacturer do hereby declare the
nature of this invention to be as follows:-
My invention relates to an improved manufacture of tubular metal lances whereby
the blade of the lance, or the butt end thereof, or both parts, are made of one piece
with the tubular stem or shaft.
The stem or shaft is produced by forming a disc such. as is shewn at Fig. 1 of the
accompanying drawings in the known manner by means of drawing punches, into a
cup such as is shewn at Fig. 2, which cup is then converted by successive drawings
such as are indicated at Figs. 2 to 6 into a tubular rod of any desired length and of
considerably reduced diameter.
This having been done, the closed end of the tubular stem Fig. 6 is then formed
into a point such as at a Fig. 7, by pressing, upsetting, forging &c., so that it can be
seized by tongs, in order to hold it during the further drawing operations at the
draw bench.
This point may also be produced during the before mentioned drawing with
punches, by forming the end of the first punch rounded, and then using punches
with gradually more and more pointed ends, so that the forms shewn at Figs. 3" 4" 5"
and 7 are successively produced.
The point a may remain in this form on the tube, and constitute the butt end of
the lance, or its extremity may be formed into a spherical knob b, Fig. 7ª or into a
cylindrical head with screw thread c Fig. 7, in order to enable the tube to be held
by such knob or screw while it is being drawn out on the draw bench.
Instead of producing the tubular stem from a disc or washer as described, a tube
open at both ends, as at Fig. 8, may be produced in any known manner, the one end
of which is then formed into a closed point a by forging, welding, pressing &c., by
which it can be held in the draw bench, or, as before described, it may be formed into
a knobb Fig. 8 or into a cylinder with screw thread, e Fig. 86.
The tube is then drawn out to the required length and diameter for the shaft of the
lance.
The point can afterwards be either suitably formed into the butt end of the lance by
removal of the knob or screw and by suitably rounding it, or it may be formed into
the blade as at 6 Fig. 9º.
In the first named case the other end of the tube is provided with the blade ³ as at
Figs. 9 and 13, and in second case it is provided with the butt end a² as at Figs. 9
and 12 the parts being secured to the tubular shaft by forming the one or the other
part with a tubular stem d or d¹ which is fixed securely by brazing.
The tubular shaft can also be drawn in at the open end and only the solid blade 63
be prepared separately, this being formed with a stud d' which is introduced into the
reduced opening of the shaft and is fixed by brazing as shewn at Fig. 10.
Lastly, in the case where the blade is formed on the closed end, as at Fig. 9*
and 11, by drawing or welding, the open end can be formed into the butt end of the
lance by pressing, upsetting forging welding &c. as shewn at Fig. 11, so that the
entire lance is then formed out of a single piece.
Dated this 23rd day of October 1888.
ABEL & IMRAY,
Agents for the Applicant.

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COMPLETE SPECIFICATION.
An Improved Manufacture of Tubular Metal Lances.
I, WILHELM LORENZ, of No. 44 Westendstrasse of Karlsruhe in the Grand
Duchy of Baden, German Empire, Engineer, 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 :-
--
My invention relates to an improved manufacture of tubular metal lances whereby
the blade of the lance, or the butt end thereof, or both parts, are made of one piece
with the tubular stem or shaft.
The stem or shaft is produced by forming a disc such as is shewn at Fig. 1 of
the drawings accompanying my provisional specification in the known manner by
means of drawing punches, into a cup such as is shewn at Fig. 2, which cup is
then converted by successive drawings such as are indicated at Figs. 2 to 6 into a
tubular rod of any desired length and of considerably reduced diameter.
This having been done, the closed end of the tubular stem Fig. 6 is then formed
into a point such as at a Figure 7 by pressing, upsetting, welding &c., so that
it can be seized by tongs, in order to hold it during the further drawing operations
at the draw bench.
This point may also be produced during the before mentioned drawing with
punches, by forming the end of the first punch rounded, and then using punches
with gradually more and more pointed ends, so that forms shewn at Figs 3ª 4" 5ª
and 7 are successively produced.
The point a may remain in this form on the tube and can constitute the butt end
of the. lance, or...its extremity may be formed into a spherical knob 6 Fig. 7 or
into a cylindrical head with screw thread c Fig. 7 in order to enable the tube to
be held by such knob or screw while it is being drawn out on the draw bench.
Instead of producing the tubular stem from a disc or washer as described, a tube
open at both ends, as at Fig. 8, may be produced in any known manner, the one
end of which is then formed into a closed point a by forging welding pressing &c.,
by which it can be held in the draw bench, or, as before described, it may be formed
into a knobb Fig. 8ª or into a cylinder with screw thread c Fig. 8b.
The tube is then drawn out to the required length and diameter for the shaft of
the lance..
The point can afterwards be either suitably formed into the butt end of the lance
by removal of the knob or screw and by suitably rounding it, or it may be formed
into the blade as at 6 Fig. 9.
01
In the first. named case the other end of the tube is provided with the blade b² as
at Figs 9. and 13 and in the second case it is provided with the butt end a² as at
Figs. 9 and 12, the parts being secured to the tubular shaft by forming the one or
.the other part with a tubular stem d or d¹ which is fixed securely by brazing.
. The tubular shaft can also be drawn in at the open end, and only the solid blade 6³
separately, this being formed with a stud d' which is introduced into the reduced
opening of the shaft and is fixed by brazing as shewn at Fig. 10..
Lastly, in the case where the blade is formed on the closed end, as at Figs. 9
.and.11, by drawing or welding, the open end can be formed into the butt end of the
lance, by pressing, upsetting, forging, welding &c. as shewn at Fig. 11 so that the
entire lance is then formed out of a single piece.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The production of tubular metal lances in which either the butt end, or the
blade or both parts are formed in one with the tubular shaft, substantially as herein
described.
2. The process for the production of tubular lances such as are referred to in the

page_text: preceding claim wherein tubes such as shewn at Fig. 6 formed by drawing out of
blanks, are formed by pressing, upsetting, welding, or similar operations into a
point a Fig. 7 at one end on which end may or may not then be formed a
knob Fig. 7 or a screw thread c Fig. 7b, by means of which the tube is held
while undergoing the drawing process for extending it to the required length for the
lance shaft, after which the said closed end is either formed into the butt end or into
the blade end, while the other end.is formed either into the blade end or into the butt
end, either by forging or pressing out of the solid, or by having a separate blade or
butt end fitted thereto, substantially as described with reference to Figs. 9 to 13 of
the drawings.
3. The modification of the process referred to in the preceding claim, wherein the
closed end of a cup-shaped blank is gradually formed into a point by suitably formed
dies during the process of drawing, substantially as described with reference to
Figs. 3 4 and 5" of the drawings.
4. The modification of the process referred to in the second claim wherein a tubular
blank open at both ends is first drawn out to the required length and then has its
one end or both ends formed into a closed point by forging pressing or welding,
substantially as described with reference to Figs. 8, 8, 8b, of the drawings.
Dated this 2nd day of July 1889.
ABEL & IMRAY.