Improved Manufacture of Metallic Packing for the Flange Joints of Tubes, Cylinder Covers of Steam Engines, Manhole Covers, and, the like, and New Bimetallic Rods intended for the Manufacture of such Packings.
Year: 1894

page_text: Deng
France),
Date of Application (in United Kingdom), 27th Feb., 1894
Complete Specification Left. 27th Feb., 1894-Accepted, 14th Apr., 1894
COMPLETE SPECIFICATION.
Improved Manufacture of Metallic Packing for the Flange Joints of
Tubes, Cylinder Covers of Steam Engines, Manhole Covers, and,
the like, and New Bimetallic Rods intended for the Manufacture
of such Packings.
I, EMANUEL LABHARDT, of Bale, Switzerland, Merchant, 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 present invention has for its object a new manufacture of bimetallic annular
packings for joints of flanged pipes, cylinder covers, manhole covers and the like,
such packing consists essentially of a spiral coil with very close convolutions of
lead or other soft metal, this spiral coil being strengthened internally by a band,
rod, or tube or one or several wires of a harder metal, such as iron, copper, brass &c.,
for the purpose of preventing the complete crushing of the packing when the joint
is compressed, for obtaining a better retention of the soft metal in the joint, that is
to say, to prevent this metal from escaping laterally out of the joint when this is
compressed, and also to obtain, in consequence of the presence of a harder metal
between two layers of soft metal, the penetration of the latter to the bottom
of the sharpest grooves that may exist on the surfaces of the flanges or other
elements of junction to be united.
On the accompanying drawing
Figs. 1 and 2 shew in front elevation and in cross section a packing formed of a
bimetallic rod coiled into a spiral so as to form an elliptical ring.
Figs. 3 and 4 shew in front elevation and in cross section another annular
packing formed of a spirally coiled bimetallic rod, and
Figs. 5 and 6 shew separately in longitudinal and cross sections a bimetallic
rod similar to those employed for the manufacture of the packing shewn at
Figs. 1 to 4.
The bimetallic packing shewn in the Figs. 1 to 4 are formed of a bimetallic rod
coiled spirally and the coils, which are very close together, connected or united
together in any suitable manner.
A similar bimetallic rod (Figs. 5 and 6) has a core B₁ of metal, such as iron,
copper, brass, &c. enclosed in an annular sheathing A' of lead or other soft metal.
These bimetallic rods can be manufactured either by introducing the metal wire
constituting the core B¹ into a tube of lead A¹ previously prepared, or they may be
made by any of the known means for producing rods or wires of two combined
metals.
The coils of the bimetallic rod, which, by its coiling into spiral form, constitutes
the annular packing, can be united together for example, by soldering at 6' as at
Fig. 1, which shews a packing having the form of an elliptical ring, or by ligatures
formed, for example, by bands of lead Fig. 3 coiled round the several convolutions
of the bimetallic rod, and secured there if necessary by soldering..

page_text: The union of the several coils of the bimetallic rod can also be obtained by
cutting away by means of a knife a strip of the ordinary metal covering A', and
winding this strip round the coils of the rod without detaching it from the
covering A', as shewn at Fig. 3, the said strip being if necessary fixed by
soldering; or again, the coils may be united by uniting the extremities of the
core B' of the spirally coiled bimetallic rod, by means of a binding of wire, of iron
brass copper &c. 64 Fig. 3.
When an annular bimetallic packing constructed as described is compressed for
example between two pipe flanges, the lead or other soft metal constituting the
covering A fills out all the spaces existing between the convolutions of the
strengthening, coil of harder metal B' so that the convolutions of B' of the harder
metal retain the softer metal in the joint and prevent the lead or other soft metal
from being completely crushed between the flanges and consequently also the
lateral escape of this metal outside the joint.
The covering A¹ of these annular bimetallic packings could also be formed of
soft copper, in which case the strengthening coil Bi would be made of iron
or steel.
When the new annular packing is intended to be applied to the joints of pipes
through which pass liquids that attack the soft metal of the covering A' of the
packing, the soft metal covering might be coated with a layer of a metal that is
not attacked by the said liquids.
My annular bimetallic packing can of course be made of all sizes.
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 :-
1. A manufacture of annular bimetallic packings for flanged pipe joints, cylinder
covers, manhole covers and the like, consisting of a close spiral coil of lead or other
soft metal such coil being strengthened internally by a core of a harder metal such
as iron, copper, brass and the like, substantially as herein described.
2. A manufacture of bimetallic packing such as is referred to in the first claim,
constructed of a bimetallic rod with a tubular covering A¹ of lead or other
soft metal and a core B' formed by a wire or tube of a harder metal the said rod
being coiled spirally with close convolutions that are connected or tied together
substantially as herein described with reference to Figs. to 4 of the drawings.
3. As new products bimetallic rods suitable for the manufacture of packings such
as are referred to in the preceding claims, the said rods being composed of a tubular
covering of lead or other soft metal and a core of wire or tubing of iron, copper,
brass and the like, substantially as described with reference to Figs. 5 and 6 of the
drawings.
Dated this 27th day of February 1894.
ABEL & IMRAY,
Agents for the Applicant.