Improvements in and connected with Metallic Packing for Piston Rod Stuffing Boxes and other purposes.
Year: 1895

page_text: Date of Application, 26th Jan., 1895
Complete Specification Left, 30th Mar., 1895-Accepted, 11th May, 1895
PROVISIONAL SPECIFICATION.
Improvements in and connected with Metallic Packing for Piston
Rod Stuffing Boxes and other purposes.
1 THEODORE SICHEL of 93 and 95 Borough High Street in the County of
London Manufacturer's Agent do hereby declare the nature of this invention to be
as follows: :-
This invention relates to that class of metallic packing for piston rods valve rods
cocks and other purposes which is composed of ribbons threads filaments globules
or pellets of metal or alloy and has for its object to lessen the cost of production of
and to render such packing more elastic than that hitherto in use.
Now according to this invention I form the packing from an alloy of copper
oxide of manganese, tin, lead and antimony.
The copper is first melted in a suitable crucible from 2 to 6 per cent. of oxide
of manganese is then added and the contents of the crucible continually stirred
until thoroughly incorporated the tin is then added in suitable proportions say
3 parts tin to one part copper and the resulting alloy cast into ingots this forms
alloy No. 1.
I next melt together in a crucible tin and lead in the proportion of two parts of
lead to one of tin and when fused I add thereto about 6 per cent. of the alloy No. 1
this forms alloy No. 2.
This alloy is then cast into discs having a hole in the centre.
I next melt together similar proportions of lead and tin and when fused I add
thereto 10 to 15 per cent. of the alloy No. 1 this forms alloy No. 3.
This alloy is then cast into similar discs and when cold the discs are threaded
alternately on a mandrel and placed in a turning lathe and there reduced to ribbons
shavings or filaments.
The discs while being turned rotate in a trough containing a mixture of plumbago
soapstone and grease or mineral oil so that the lubricant is thoroughly incorporated
with the packing.
I prefer to form the edges of the cutting tools in such a manner that each strip
of metal is twisted as the elasticity of the packing is thereby increased.
The packing is applied to stuffing boxes and the like in the same way as ordinary
fibrous packing and is applicable for piston and valve rods cocks and other purposes
for which ordinary fibrous or metallic packing is used.
This packing may be also packed in the form of pellets or balls made from
shavings or sheets of the alloys hereinbefore mentioned.
Dated this 26th day of January 1895.
T. E. HALFORD,
11, Furnival Street, London, E.C., Agent for Applicant.

page_text: Improvements in and connected with Metallic Packing for Piston
Rod Stuffing Boxes and other purposes::
I THEODORE SICHEL of 93 and 95 Borough High Street in the County of
London Manufacturer's Agent d'o 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 relates to that class of metallic packing for piston rods, valve
rods cocks and other purposes which is composed of ribbons threads filaments
globules or pellets of metal or alloy and has for its object to lessen the cost of
production of and to render such packing more elastic than that hitherto in use.
Now according to this invention I form the packing from an alloy of copper
oxide of manganese, tin, lead and antimony.
The copper is first melted in a suitable crucible from 2 to 6 per cent. of oxide
of manganese is then added and the contents of the crucible continually stirred
until thoroughly incorporated the tin is then added in suitable proportions say
3 parts tin to one part copper and the resulting alloy cast into ingots this forms.
alloy No. 1.
I next melt together in a crucible tin and lead in the proportions.of two parts of
lead to one of tin and when fused I add thereto about six per cent. of the alloy No. 1
this forms alloy No. 2.
This alloy is then cast into discs having a hole in the centre.
I next melt together similar proportions of lead, and tin and when fused I add
thereto 10 to 15 per cent. of the alloy No. 1 this forms alloy No. 3.
This alloy is then cast into similar discs and when cold the discs are threaded
alternately on a mandrel and placed in a turning lathe and there reduced to ribbons,
shavings or filaments.
The discs while being turned rotate in a trough containing a mixture of plumbago
soapstone and grease or mineral oil so that the lubricant is thoroughly incorporated
with the packing.
I prefer to form the edges of the cutting tools in such a manner that each strip
of metal is twisted as the elasticity of the packing is thereby increased.
The packing is applied to stuffing boxes and the like in the same way as ordinary
fibrous packing and is applicable for piston and valve rods, cocks and other purposes
for which ordinary fibrous or metallic packing used.
And in order that my said invention may be fully understood I will proceed
to explain the same with reference to the accompanying sheet of drawings in
which:-
Fig. 1 represents disc of alloy No. 2.
Fig. 2. represents disc of alloy No. 3.
Fig. 3. is edge view of one of the discs.
Fig. 4. shews discs mounted on mandrel ready for turning.
Fig. 5. shews a strip of metal of which the packing is composed.
Fig. 6 shews a similar strip flat instead of twisted.
Fig. 7. is section through mandrel and discs shewing trough containing the
lubricant.
The same letters denote the same parts in all the figs.
a a are the discs of alloy No. 266 the discs of alloy No. 3. the mandrel having
screw threads at one or both ends d d nuts fitting the said threads and used to clamp
the discs to the mandrel e the trough containing the lubricant f.
To make the packing a suitable number of discs a and b are threaded alternately
on the mandrel c and the nuts d d screwed up the mandrel is then placed in a

page_text: turning lathe with the discs dipping into a trough e containing a mixture of
plumbago, soapstone and grease or mineral oil in about the proportions following
Plumbage
50 parts
or mineral oil may be allowed to drip on to the discs from an overhead tank as
shewn in dotted lines Fig. 7. and the turnings fall into a trough containing mineral
oil plumbago and soapstone.
The discs are then reduced to strips ribbous shavings or filaments by means of
suitable turning tools preferably having their cutting edges formed so as to twist
the metal turnings whereby the elasticity of the packing is increased.
If the packing is required in long strips it is necessary to keep the turning tool
in contact with each disc for some little time but if short shavings are to be made
the cutting tool is made to traverse quickly from disc to disc.
The alloy No. 3. is used to render the packing more elastic than would be the
case if it were made entirely of the softer alloy No. 2 and by threading the discs
alternately on a mandrel and turning them with the sliding motion of a lathe the
metal strips as they fall from the tool will be intimately mixed so that a given
weight of packing will contain equal amounts of each alloy.
If a soft packing is required less of the harder alloy may be used and if a hard
elastic packing is needed a greater quantity of the harder alloy will be required
this may be effected by making the discs of unequal thickness or by placing
unequal numbers of discs of each alloy on the mandrel but in practice equal
amounts of each alloy will be found suitable for ordinary valve spindles, piston
rods, cocks and other purposes.
Or the proper proportions of each alloy may be cast into a single disc and the
strips formed by cutting away the face of the disc by means of the surfacing motion
of the lathe instead of sliding.
The packing is placed in the ordinary stuffing box in the usual way a turn of
flexible packing may be interposed between the metallic packing and the gland if
desired.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed 1 declare that what
I claim is :-
1. A metallic packing consisting of strips, shaving, ribbons or pellets of alloys of
copper tin, lead, oxide of manganese and antimony in about the proportions stated.
2. A metallic packing formed from discs of alloys of tin, lead, copper antimony
and oxide of manganese by turning or otherwise reducing the said discs to strips,
ribbons, shavings or filaments and incorporating with the same a lubricant
composed of soapstone, plumbago and mineral oil or grease during the process
of forming the said strips ribbons or filaments substantially as hereinbefore
specified.
3. Metallic packing for piston rod stuffing boxes and other purposes constructed
substantially as bereinbefore specified.
Dated this 30th day of March 1895
T. E. HALFORD,
11, Furnival Street, Holborn, E.C., Agent for Applicant.