Year: 1887

page_text: Date of Application, 24th Sept., 1887
Complete Left, 10th May, 1888
Complete Accepted, 15th June, 1888
I, WILLIAM MUIRHEAD SIMPSON, of the firm of Simpson Roberts & Co., Merchants,
of 41 North John Street, Liverpool, and of Halifax, Nova Scotia, do hereby declare
the nature of this invention to be as follows :-
The lubricating composition, the details of which my Canadian friends have commu-
nicated to me, consists partly of materials which will liquify under moderate beat,
partly insoluble pulverulent solid, and partly fibrous materials. Now some of these
ingredients are used up quicker than others. The invention therefore partly consists
in using two different compositions, the first A, containing the ingredients as they
would be used if they were all consumed equally; the second B, chiefly of those
which are consumed fastest, while both compositions are preferably used in locomotives
to give the best results, namely, A first, then B afterwards; B can be used without A
especially for marine use.
*One formula found very useful for general purposes is:

page_text: It is found, however, that this can be varied within considerable limits, without
very striking disadvantage. Other cocoa-nut oils or even other nut oils or oils of
similar nature, can take the place of the first item, other animal fats and oils, and
greases of similar nature can be substituted for the two next. Molybdenite, ground
antifriction metal, and other antifriction mineral materials can be substituted for
plumbago, other fibrous matter for yarn waste, while numerous well known chemically
equivalent substances can take the place of the remaining three.
The quantities can be varied within considerable limits, and also the degree of
saturation of the last two ingredients can be somewhat varied, but from numerous
experiments on Canadian railways, the above proportions and strengths of solution
have been found to give maximum advantages, and therefore my correspondents, with-
out binding themselves to them exclusively, consider that the use of these quantities
and also the degree of strength at which the saline solutions are used, form valuable
claims or parts of the invention.
Dated this 23rd day of September 1887.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool,
Agents for the Applicant.

page_text: other antifriction mineral materials can be substituted for plumbago, other fibrous
matter for yarn waste, while numerous well known chemically equivalent substances
can take the place of the remaining last two, notably the potassium salts instead of
the sodium ones, and silicate to some extent for carbonate.
The quantities can be varied within considerable limits and also the degree of satu-
ration of the last two ingredients can be somewhat varied, but from numerous
experiments on Canadian Railways, the above proportions and strengths of solution
have been found to give maximum advantages and therefore without binding myself
to them exclusively, I consider the use of these quantities and also the degree of
strength at which the saline solutions are used to form valuable claims or parts of
my invention.
This lubricant in consequence of the use of the cocoa nut oil combined with
sodium chloride and carbonate of soda has an abnormally low melting point, about
37 degrees centigrade. A saponified grease is thus obtained, which while solid at
ordinary temperatures melts at such a slight rise of temperature as to prevent early
and retard ultimate generation of frictional heat in the bearings.
The soap thus formed possesses novel lasting powers from its low setting point and
its emollient nature.
The use of "tin crystals" is a novelty which coats the journals with a cooling anti-
friction surface, and
The mixture B is suitable to all bearings where grease suits in machinery for land
engines railway or steamers.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by my
foreign correspondents, 1 declare that what I claim is :-
1st. The lubricant, substantially as herein described, whether having the exact
ingredients and quantities set forth in the tabular receipt, or varied within the limits
herein described as equivalents.
2nd. The addition of "tin crystals" to lubricants of the type set forth in this
specification.
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