Improvements in the Manufacture of Lubricants.
Year: 1891

page_text: Date of Application, 22nd Sept., 1891
Complete Specification Left, 9th June, 1892-Accepted, 9th July, 1892
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Lubricants.
I, ROBERT HUTCHISON, of Springvale Mills, Cowlairs, in the County of Lanark,
North Britain, Oil Manufacturer and Refiner, do hereby declare the nature of this
invention to be as follows, that is to say :-
:-
My said invention has for its object to improve the manufacture of lubricants
of kinds suitable for railway axles and for other apparatus requiring lubricants of
considerable consistency or body.
Lubricants made according to my present invention are to some extent of similar
character to lubricants made as described in my Patent Specification, 1026 of 1886,
but are better adapted than such lubricants to withstand certain changes of tem-
perature without their consistency being objectionably modified thereby.
In carrying out my present invention I combine slaked lime, with oleic, margaric,
or stearic acid, or any mixture of such acids, with mineral or hydrocarbon oil
of suitable lubricating quality and with pinate of soda or of potash. The pro-
portions of the ingredients may be varied; but by way of example I may state
that when using a mineral oil of 905 specific gravity I combine together about
30 parts by weight of the oil, 14 parts of oleic or similar acid, 1 part of slaked
Lime (weighed before being slaked) and 9 parts of the pinate of soda. The piuate
of soda is, by preference, added and well mixed with the other ingredients after
these have been formed into a grease in the manner described in my earlier
Specification herein before referred to.
Dated this Twenty-first day of September 1891.
EDMUND HUNT,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Lubricants.
I, ROBERT HUTCHISON, of Springvale Mills, Cowlairs, in the County of Lanark,
North Britain, Oil Manufacturer and Refiner do hereby declare the nature of this
invention and in what inanner the same is to be performed, to be particularly
described and ascertained in and by the following statement that is to say :-
My said invention has for its object to improve the manufacture of lubricants
of kinds suitable for railway axles and for other apparatus requiring lubricants of
considerable consistency or body.
Lubricants made according to my present invention are to some extent of similar
character to lubricants made as described in my Patent Specification 1026 of 1886,
but are better adapted than such lubricants to withstand certain changes of
temperature without their consistency being objectionably modified thereby.
In carrying out my present invention I combine slaked lime with oleic, margaric,
or stearic acid, or any mixture of such acids, with mineral or hydrocarbon oil of
suitable lubricating quality and with pinate of soda or of potash. Whilst, however,
I, as formerly, use a considerable excess of the acid relatively to the lime, and for
the same purpose, I use a smaller proportion of the oil.
The proportions of the ingredients may be varied; but by way of example I
may state that when using a mineral oil of 905 specific gravity I combine
together about 30 parts by weight of the oil, 14 parts of oleic or similar acid,
and 1 part of slaked lime (weighed before being slaked). These ingredients are
1 Prinosul

page_text: formed into a grease in the manner described in my earlier Specification herein-
before referred to, that is by boiling them together by means of steam injected into
them, or in any other convenient way, until the mass becomes homogeneous. After
the boiling operation sufficient time is given to allow the grease which has been
formed, but is still fluid, to separate from the excess of water due to the steam
injected, and to the slaked lime. The grease is then run off into coolers having
a depth of about a foot, and in the coolers it is, by preference kept gently stirred
until it begins to set.
After the grease has thoroughly set in the coolers there is intimately mixed with
it pinate of soda or of potash in the proportion of 9 parts by weight for the quantity
The
of grease made with the quantities of ingredients hereinbefore specified.
mixture is effected in a pug mill or other suitable mixing apparatus and the product
is rendered soft and pliable and in a condition facilitating its access to the surfaces
to be lubricated by it, whilst it has the property of retaining its consistency or
body substantially uniform, and does not become thin and fluid with such increase
of temperature as it may be subjected to in ordinary use.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
A grease-like lubricant composed of lime combined with oleic, margaric, or stearic
acid or a mixture of such acids with mineral or hydrocarbon oil and pinate of soda
or of potash, the ingredients being compounded in the proportions and in the manner
substantially as herein before described.
Dated this Eighth day of June 1892.
EDMUND HUNT,
Applicants Agent.