Improvements in Apparatus for Controlling the Speed of Machinery.
Year: 1895

page_text: Date of Application, 2nd Nov., 1895-Accepted, 7th Dec., 1895
COMPLETE SPECIFICATION.
Improvements in Apparatus for Controlling the Speed of Machinery.
We, JOSEF IGNAZ RUSCH of 23 Schmelzhutter-strasse, Engineer, and OTTO
SENDTNER of 23 Schulgasse, Engineer, both of Dornbirn in the Province of
Vorarlberg, in the Austro-Hungarian Empire, do hereby declare the nature of
this invention, and in what mauner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
The object of this invention is the construction and arrangement of an apparatus
which will serve the purpose of securing, as far as practicable, a uniform rate of
speed for one or several connected machines. This result we obtain by the use of a
variable mechanical resistance so arranged that when the speed of the machinery
tends to increase, the amount of mechanical resistance automatically increases, and
the reverse.
We will describe our invention with reference to the accompanying drawing
which represents a sectional elevation.
The mechanical resistance consists of a paddle wheel which is rotated with the
machinery and is enclosed in a casing. When the speed of the machinery increases,
fluid is admitted to the paddle wheel casing, and when it decreases, the access of
the fluid is cut off. The fluid is driven out of the casing by the action of the
paddle wheel, and in this respect the apparatus operates in the same manner as a
centrifugal pump, and it will be obvious that vanes or the like may be substituted
for the paddles.
The paddle wheel casing K, is in communication with the pipe L, through the
valve box W and valve V. In the upper part of the casing there is an overflow O,
which may communicate with the tank or reservoir from which the tube L is
supplied. The wheel F, fitted with the paddles S, is mounted in the casing and is
driven by the external wheel or pulley P' with the machinery to be controlled. The
action of the wheel F is to raise the water which finds access to the casing, and
expel it through the overflow O, and it is evident that the larger the quantity of
fluid which finds access to the casing, the greater will be the amount of work to be
done. The increase in the amount of work done naturally tends to diminish the
speed. We regulate the admission of fluid to the casing in such a manner as to
correspond with the fluctuations in the speed, by means of the governor T, or any
other suitable tachometer, driven with the machinery through the pulley P. When
the speed of the machinery is normal, the casing is practically empty and the wheel
encounters only air resistance. As the speed increases, the governor lifts the valvo
thus admitting fluid. When the speed diminishes the governor closes the valve and
the fluid in the casing is expelled.
The wheel F and its casing may be arranged horizontally instead of vertically.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. An apparatus for controlling the speed of machinery, constructed arranged
and operating substantially as herein before described and as illustrated by the
accompanying drawings.
2. In apparatus for controlling the speed of machinery, the combination and
arrangement with a paddle or vane wheel rotating within a casing, of a governor
or tachometer, a valve through which fluid is almitted to the casing and which is

page_text: controlled by the governor or tachometer, and an outlet from the casing, substantially
as hereinbefore described and as illustrated by the accompanying drawings.
Dated this 1st day of November 1895.
W. E. HEYS & SON,
Agents for the Applicants.