-A New Composition for Knife Handles and other purposes.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
-A New Composition for Knife Handles and other purposes.
We, WALTER COTTRELL PARKIN, of 41, Eyre Street, ALFRED WILLIAMS, of
243, Rockingham Street, and HARRY KITCHIN, of Soho Works, Summerfield
Street, all Cutlery Manufacturers, and of the City of Sheffield, do hereby declare
the nature of our invention to be as follows;
Our invention relates to the production of a new composition or substance
which is very suitable for the manufacture of handles for table knives and
other knives and for many other articles for which ivory, bone, staghorn and
the like have been used, the product being readily moulded to shape, and when
set is solid and hard, can be bored and turned, produced in different colours
and at small cost.
In carrying out our invention into practice we take as a basis, bonedust, ivory
dust, or horndust or a combination of any or all of them, say for example, of bone
dust one stone weight ground to a powder, we then take five pounds of shellac
and half a pound of caustic soda and dissolve in ten pints of water, boil well
and mix the bone dust with it thoroughly until well incorporated.
When the composition has been dried, grind it down to a powder in which
form it is placed in moulds heated to a suitable degree and pressed to form,
either of a first shape or the final shape. For some purposes we may use a
small proportion of resin, or of gelatine, adding a little bi-chromate of potash,
but the resulting composition is not so satisfactory as that produced by the
before described process.
We may also use the following components to obtain a superior result, bone
or ivory dust forty six parts, shellac twelve parts and ammonia thirty six parts,
boil, mix, and use as before described.
A New Composition for Knife Handles and other purposes.
We, WALTER COTTRELL PARKIN, of 41, Eyre Street, ALFRED WILLIAMS, of
243, Rockingham Street, and HARRY KITCHIN, of Soho Works, Summerfield
Street, all Cutlery Manufacturers, and of the City of Sheffield, 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:-
Our invention relates to the production or manufacture of a new composition,
[Price 871

page_text: material or substance, suitable for the manufacture of handles for table knives,
and other knives, and capable of being used for many other purposes
and
articles as a substitute for bone, horn, ivory and the like.
It can be readily moulded into form, and when set, it is solid and hard, and
is capable of being bored; turned, carved and otherwise worked to pattern; it
can also be produced in any desired colour, and can be produced at a very
moderate cost.
For example in carrying out our invention for general purposes we use as
the basis of the composition, bonedust, horndust, or ivorydust either separately
or in the form of a combination of any two or of all them, of this basis we
take for example 14lbs.; we then take 5lbs. of resin, shellac, copal, or other
similar vegetable gum, and lb. of caustic soda, or potash, and dissolve these
two last mentioned in 10 pints of water or thereabouts which we boil and while
boiling we add the basis above mentioned, and mix thoroughly until the
ingredients are well incorporated.
When the composition is partially dry but still in a plastic state, it may
for some purposes, such as the manufacture of table knife handles, be forced
through tubular outlets or like moulding apparatus and so formed into rods
or bars, and then cut up into the desired lengths, or when thoroughly dried
it may be passed through a disintegrator, or masticator or be otherwise reduced
to a powder and in this pulverized state be placed within heated moulds and
then pressed to the desired configuration.
For some purposes we may reduce the quantity of the before mentioned
vegetable gum by about two fifths and substitute gelatine to the same amount
adding to it when in solution a little bi-chromate of potash say ten to twelve
grains, but we prefer the first described composition.
To obtain a superior quality of our composition we may use the following
components: bone dust or ivory dust (or a combination of both), 46 parts;
shellac or like vegetable gum, 12 parts; ammonia 880 fort, 36 parts; boil,
mix and incorporate and use as before described.
The proportions stated give the best result, but they may be varied to some
extent without departing from the spirit of our invention.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that
what we claim is:-
1-The herein described composition of matter consisting of 14 parts (by
weight) of either bone dust, horn dust, or ivory dust, or of any combination of
these to form the basis; 5 parts of resin, shellac or other suitable vegetable
gum; and part of caustic soda, or potash, treated and combined as herein-
before described.
2A composition of matter, consisting of a basis of bone dust, horn dust,
or ivory dust separately or in combination, with an admixture of shellac or
vegetable gum and gelatine and a small proportion of bi-chromate of potash
as hereinbefore described.
3A composition of matter, consisting of bone dust, or ivory dust, separately
or in combination, with an admixture of shellac or like vegetable gum and
ammonia, in the proportions as herein before specified.
Dated the 19th day of June 1900.
ROBT. F. DRURY, C.P.A..
Agent for Applicants.