Adhesion Fat for Driving Belts and the like.
Year: 1899

page_text: Date of Application, 11th July, 1899-Accepted, 19th Aug., 1899
COMPLETE SPECIFICATION.
Adhesion Fat for Driving Belts and the like.
I, WILHELM HOFSCHULTE, of Freren, in the Province of Hanover, in the
German Empire, 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:―
The subject of the present invention is a fluid fat for application to driving
belts and the like, in order to afford the necessary adhesion at the belt pulley.
The adhesion fat consists of about 60% of half saponified oleine, about 15% of
vaseline oil, about 5% of castor oil and about 20% of resin. These ingredients
are mixed together in an iron receptacle and heated until the resin melts, for
which a high degree of heat is necessary. The mixture must be constantly
stirred whilst on the fire, in order that the different substances may intimately
combine. When the resin has melted, the mixture is allowed to boil for another
7 or 8 minutes, whilst still being constantly stirred as before.
If in place of the half-saponified oleine, tallow-oleine were used (the other
ingredients remaining as before), the mixture, instead of being fluid and clear,
would become thick. If less oleine were used and more vaseline oil, precipitation
would take place. The oleic acid (oleine) would float on the surface and the
remaining constituents would form a sediment. Half-saponified oleine is there-
fore necessary in order to obtain a permanently fluid adhesion-fat which does not
thicken.
The advantages of the adhesion fat may be stated as follows:
1/. It prevents the belt from slipping off the pulley and thus obviates its
having to be unduly tightly stretched. It further protects the belting against
the injurious effects of moisture, steam and absorption of oil through dripping
from the engine.
2/. Uniform speed and highest efficiency of the engine and durability of the
belting, is attained by its use.
3/. The adhesion fat prevents the accumulation of imprinties, encrustation,
scales or mould. It soaks into the leather, does not dry and does not become
viscous, so that the belting always remains pliable and presents a clean
appearance.
The fat may be applied to the inside of the belting by means of a brush,
preferably whilst the machinery is at rest, so that the fat may have time to soak
in. No more fat must be applied than the leather can absorb. On the surface,
the fat only requires to be applied to the belting if it runs in water, or is subject
to the influence of steam or chemical vapours, or to dripping oil from the
machinery. In such case, however, all grease, dirt and the like must first be
removed.
The essential feature of the new process is the use of half-saponified oleine. In
mixtures where this is not used, the resulting substance is, as above stated,
neither clear nor free from precipitate. In such cases there will be matter
floating on the surface and other matter lying as deposit at the bottom. Such a
mixture is naturally unsuitable for application to driving belts, as the deposits

page_text: when applied to the belt obstructs the operation. The half-saponified oleine is
thus absolutely essential in the preparation of the fat.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is :-
A process for manufacturing a fluid adhesion fat for driving belts and the like,
which consists in mixing vaseline oil, castor oil, resin and half-saponified oleine,
and submitting the mixture whilst being constantly stirred to the action of heat,
in the manner substantially as herein before set forth.
Dated this 30th day of June 1890