A Method of Generating Fluid Pressure for Tube Jointing, Embossing, Stamping of Metal Sheets, and such like Operations.
Year: 1897

page_text: Date of Application, 23rd Sept., 1897
Complete Specification Left 22nd July 1898 Accepted 23rd Oct.
1898
Date of Application, 23rd Sept., 1897
Complete Specification Left. 22nd July 1898-Accepted, 23rd Oct. 1898
PROVISIONAL SPECIFICATION.
A Method of Generating Fluid Pressure for Tube Jointing,
Embossing, Stamping of Metal Sheets, and such like Operations.
or
I, WALTER CLAUDE JOHNSON, of The Dignaries, Westcombe Park, in the County
of Kent, Engineer, do hereby declare the nature of this invention to be as
follows;-
My invention relates to simple means of generating the fluid pressure required for
jointing a tube in a socket by forcing the metal into recesses of the socket as in
forming a cycle frame, or for embossing tubes or stamping sheets of metal by
forcing them on an intaglio die.
For this purpose for joining a tube in a socket or several of these forming parts
of, a cycle or other tubular frame, I clamp the tubes or frame in a suitable jig or
holder and introduce a charge of explosive material, and after tightly closing all
openings, I fire this charge by percussion, electricity or otherwise, so as to gene-
rate gases under high pressure which force the metal of the tube into recesses of
the socket. When the tube is to be embossed I enclose it within a suitable mould
having the pattern in intaglio and fire an explosive within the tube. In like
manner when a sheet is to be stamped, I firmly clamp it between the intaglio die
and a hollow block charged with explosive which is fired.
Instead of applying the gases produced by explosion to act directly on the metal,
they may act indirectly by pressing on the surface of a liquid such as water, oil
or the like, with which the tube, frame or hollow of the block is charged, or by
pressing on a plunger immersed in such liquid.
Dated this 23rd day of September 1897.
ABEL & IMRAY,
Agents for the Applicant.
A Method of Generating Fluid Pressure for Tube Jointing, or
Embossing, Stamping of Metal Sheets, and such like Operations.
I, WALTER CLAUDE JOHNSON, of The Dignaries, Westcombe Park, in the County
of Kent, 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 simple means of generating the fluid pressure required for
jointing a tube in a socket by forcing the metal into recesses of the socket as in

page_text: forming a cycle frame, or for embossing tubes or stamping sheets of metal by
forcing them on an intaglio die.
For this purpose for joining a tube in a socket or several of these forming parts
of a cycle or other tubular frame I clamp the tubes or frame in a suitable jig or
holder and introduce a charge of explosive material, and after, tightly closing all
openings, I fire this charge by percussion, electricity, or otherwise, so as to gene-
rate gases under high pressure which force the metal of the tube into recesses of
the socket. When the tube is to be embossed I enclose it within a suitable mould
having the pattern in intaglio and fire an explosive within the tube.
manner when a sheet is to be stamped I firmly clamp it between the intaglio die
and a hollow block charged with explosive which is fired.
In like
Instead of applying the gases produced by explosion to act directly on the metal
they may act indirectly by pressing on the surface of a liquid such as water, oil
or the like with which the tube, frame or hollow of the block is charged, or by
pressing on a plunger immersed in such liquid.
In the accompanying drawings,
Figure 1 illustrates in vertical section one construction of apparatus for applying
fluid pressure according to this invention; the apparatus being shown as applied
for the purpose of making joints in a cycle frame.
Fig. 2 is a vertical section showing similar apparatus as used in embossing or
similarly treating metal plates and like objects, and
Fig. 3 is a vertical section of part of another construction of apparatus, also
according to this invention. Like letters indicate like parts throughout the draw-
ings.
With reference first to Figs. 1 and 2, A is a cylinder divided into two portions
by a ram or plunger B. Water or other liquid is admitted from any convenient
source to the space above the ram B, while the portion of the cylinder A which
is below the ram B serves as a chamber in which any explosive charge C may be
placed and fired. The bore of that part of the cylinder A in which the ram B
works, is made slightly larger than the bore of the lower portion in order that the
ram B may not descend too far in the cylinder A.
er
A projectile 1) is provided, capable of travelling in the cylinder A under the
influence of the explosion which occurs when the charge C is fired.
* C
A breech-block A¹ is fitted to the cylinder A, and means such as the U-shaped:
washer B are provided to prevent leakage of the liquid past the ram B.
E (Fig. 1) is a mould or jig so constructed that a bicycle-frame comprising
sockets F and tubes F1 may be placed within it. In this case the sockets. F
have suitable recesses in their interiors and thus form dies into which the metal
of the tubes is forced by the pressure set up in the manner hereinafter described.
The upper portion of the cylinder A communicates with the interior of the
frame F, F1 by means of pipes G.
-
When the explosive charge C is fired-which may be accomplished by per-
cussion, electricity or any other convenient means the projectile D is urged
upward and strikes the ram B, thus setting up pressure in the liquid above it.
Vent holes may be provided as, at A4 in order that the air in front of the pro-
jectile D may escape.
In Fig. 2 the mould E is shown holding a die H into which the metal of a
plate F2 under treatment is forced. In this arrangement the tubes G, connecting
the cylinder A and the mould E, are dispensed with, the lower part of the mould.
being hollow and in direct communication with the upper end of the cylinder A.
Fig. 3 illustrates another construction of apparatus according to this invention
in which instead of one continuous cylinder A two separate cylinders A2 and A3
are provided; the lower cylinder A2 forming the explosion chamber, and the
upper cylinder A³ constituting the pump cylinder. They are rigidly held in posi-
tion as by the frame J.
A ram B is provided common to the explosion
der A3; it is furnished with glands as at B².
J.
chamber A2 and pump cylin-

page_text: In this construction the explosive charge C acts directly upon the ram B, the
projectile D being dispensed with.
It is obvious that by inverting the arrangement shown in Figs. 1 and 2, and
withdrawing the projectile D and ram B the explosive charge may if desired be
allowed to act directly upon the surface of the liquid.
It is to be understood that the moulds E are merely shown by way of example,
and also that the relative position of the cylinder A and mould E may be altered
in various ways without departing from the spirit of this invention.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. Generating substantially as described by firing an explosive fluid pressure for
expanding embossing or similarly treating metal objects.
2. In a fluid pressure apparatus for the purposes described obtaining percussive
action by the impact of an explosive-impelled projectile upon the hydraulic ram.
3. The combination of a mould E one or more dies F or H. a liquid a ram B
an explosive C and a projectile D operating substantially as described or illus-
trated in Figures 1 and 2 of the accompanying drawings.
4. The combination of a pump cylinder A3 an explosion chamber A2 and a
ram B common to the two substantially as described and illustrated in Figure 3 of
the accompanying drawings.
5. The complete apparatus for applying fluid pressure for expanding embossing
or similarly treating metal objects substantially as described and illustrated in
Figure 1 or Figure or Figure 3 of the accompanying drawings..
1000
day of y
WALTER CLAUDE JOHNSON,
Boult & Wade,
Agents for the Applicant.