An Oil Testing Apparatus for Ascertaining the Frictional Coefficient of Oils and Fats.
Year: 1892

page_text: Date of Application, 25th Aug., 1892
Complete Specification Left, 24th May, 1893-Accepted, 24th June, 1893
PROVISIONAL SPECIFICATION.
An Oil Testing Apparatus for Ascertaining the Frictional Coefficient
of Oils and Fats.
I, GEORGE THOMAS, of the firm of George Thomas and Company, of 28
Deansgate, Manchester, in the County of Lancaster, Engineer, do hereby declare
the nature of this invention which has been communicated to me from abroad by
Albert Stauber, of Leipsic, in the Empire of Germany, Engineer, as follows-
This invention relates to an apparatus for ascertaining the coefficient of friction
and simultaneously the increase in temperature of all kinds of oils and fatty
substances when employed as lubricants for rotating or moving parts or their
bearings.
The apparatus in its simplest form consists of a flanged disc wheel supported on
a horizontal shaft or axis so that the wheel when driven by cone pulleys or otherwise
revolves in a vertical plane. The flange of the wheel forms an annular groove or
recess which holds a certain quantity of the oil or other lubricant to be tested.
In this groove is fitted a brake or block from which is suspended a weight.
In operation the brake block is carried round a certain distance with the
rotating wheel, until an equilibrium is established between the weight and the
frictional resistance, and the position to which the brake block has been moved is
indicated by the movement of an arm connected to the brake block and carrying
a pointer on a graduated scale or by other suitable means, the movement of the
pointer being the measure of the frictional resistance of the oil or other lubricant,
and at the same time the temperature is taken by a thermometer fitted to the brake
block.
In testing oil or fat for use in steam cylinders it is proposed to heat the oil etc.,
preferably by an atmospheric burner to the temperature at which it is to be
used.
Dated this 04th day of August 180
H. B. BARLOW & GILLETT,
Agents for Applicant.
COMPLETE SPECIFICATION.
An Oil Testing Apparatus for Ascertaining the Frictional Coefficient
of Oils and Fats.
I, GEORGE THOMAS, of the firm of George Thomas and Company, of 28
Deansgate, Manchester, in the County of Lancaster, Engineer, do hereby declare
the nature of this invention, which has been communicated to me from abroad-by
Albert Stauber, of Leipsic, in the Empire of Germany, Engineer, 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 an apparatus for ascertaining the coefficient of friction
aud simultaneously the increase in temperature of all kinds of oils and fatty
substances when employed as lubricants for rotating or moving parts or their
bearings.
The apparatus in its simplest form consists of a flanged disc wheel supported on
a horizontal shaft or axis so that the wheel when driven by cone pulleys or
otherwise revolves in a vertical plane. The flange of the wheel forms an annular
groove or recess which holds a certain quantity of the oil or other lubricant to be
D

page_text: tested. In this groove is fitted a brake or block from which is suspended a
weight.
2
In operation the brake block is carried round a certain distance with the
rotating wheel, until an equilibrium is established between the weight and the
frictional resistance, and the position to which the brake block has been moved is
indicated by the movement of an arm connected to the brake block and carrying a
pointer on a graduated scale or by other suitable means, the movement of the
pointer being the measure of the frictional resistance of the oil or other lubricant ;
and at the same time the temperature is taken by a thermometer fitted to the
brake block.
In testing oil or fat for use in steam cylinders it is proposed to heat the oil etc.,
preferably by an atmospheric burner to the temperature at which it is to be
used.
And in order that this invention may be fully understood and readily carried
into effect I will describe the accompanying sheet of drawings reference being had
to the figures and letters marked thereon.
Fig. 1 is a front view and Fig. 2 a side view, partly in section, of a testing
machine for ascertaining the frictional coefficient of fats.
a represents the frame of the machine, the driving shaft, e the driving pulleys
and da cone pulley for giving motion to the main shaft e, by a band which
passes over a cone pulley on the shaft e; on the other end of e is a flanged disc
wheel g; the flange of this wheel g forms an annular groove gl into which a small
quantity of oil or other lubricant to be tested is placed. In this groove is fitted a
brake or block from which is suspended a weight i supported by a link j a stud j
in which rests in a hole in the block h. To the block is secured a plate k which is
formed at to carry when required a thermometer, not shown the other end of
the plate is forked and embraces a stud fixed to a bar m free to slide in brackets n
carried by the frame of the machine.
7°
To one end of the bar m is pivoted an arm o which carries a pencil o' at one end
(and at the other is weighted at 02) for the purpose of making a diagram on a
sheet of paper p which is passed over a roller
roller is driven from a worm e' on the main shaft e which gears into and drives a
and weighted by a clip q¹ this
worm wheel mounted on a stud, on which stud is a worm which gears into a
worm wheels on a stud s' and on this stud is secured a worm s² which gears into
a worm wheel secured to the axis of the roller and gives motion to it.
roller is supported so that it rests upon the paper on the roller y and keeps it
A loose
straight. A plate or table u is secured to the machine frame for the purpose of
holding a lamp or Bunsen gas burner when it is desired to heat the disc g so as to
raise the oil in the recess g¹ to the desired temperature.
When it is desired to ascertain the frictional coefficient of an oil, a small quantity
of the oil is placed in the groove y', and the machine is set in motion; as the disc
rotates the brake or block will be gradually carried forward with the weight i
which is supported by it, this movement of the block is transmitted by the plate k
to the stud and bar m which moves the upper part of the arm o and causes the
pencil o' to travel along the moving paper on the roller q and trace a diagram on it 4
which indicates the frictional coefficient of the oil.
If it be desired to ascertain the heat developed by the friction between the disc
and block a thermometer can be placed at in the plate with the bulb resting in
the groove of the disc g. The thermometer is also employed when testing oil or
fat for use in steam cylinders, the disc being heated to the temperature at which 5
the oil is to be used by a gas burner or a lamp supported on the table u.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In combination a driven flanged disc wheel having an annular groove or recess 5
containing oil or other lubricant to be tested. a brake or hlook fitted in anal

page_text: and having a weight suspended from it, an arm or pointer connected to the brake
or block and by its movements indicating the frictional resistance of the
lubricant.
2. The general arrangement of parts constituting an oil testing apparatus
substantially as and for the purposes described.
Dated this 23rd day of May 1893.
H. B. BARLOW & GILLETT,
17, St. Ann's Square, Manchester, Agents for Applicant.