An Improved Device for Governing the Velocity of Spring Driving Mechanism.
Year: 1894

page_text: Date of Application, 27th July, 1894-Accepted, 20th Oct., 1894
COMPLETE SPECIFICATION.
An Improved Device for Governing the Velocity of Spring Driving
Mechanism.
I, PAUL LOCHMANN of Leipzig-Gohlis in the German Empire, Director of The
Fabrik Lochmannschen Musikwerke Actien Gesellschaft, 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 :-
By means of the device of this invention the regulator or governor of spring
driving mechanism may be so influenced as to render it practicable to vary the
speed of the latter at any time, that is to say, to let it run down quicker or slower
at will. The wind vane regulators of driving mechanisms have hitherto been
provided with a brake which is the cause of many disadvantages, amongst which is
that of the spindles of the regulators very quickly wearing away by reason of the
friction which comes into operation. With this invention the mechanism may be
caused to work quicker or slower, as desired, without the employment of a brake.
The invention is based upon the fact that in the rotation of the air vanes of the
regulator said vanes act like a ventilator and produce a strong air current. As the
air is passed forward by the vanes these have to perform more work the greater
the quantity of air they draw and in such case will therefore rotate the slower so
that by an arrangement for regulating the velocity of the air vanes that of the
driving mechanism may also be regulated.
The invention consists in that the air vane regulator is enclosed in a casing,
container, or the like provided either with closeable apertures or is open on one
side and may be supported, slid, or turned over the regulator. This casing which
may be of any suitable form may be arranged as convenient, relatively to the
regulator, but so that it may be placed over or receive the same and be at any time
removed therefrom. By this means, when the casing is placed over the regulator
and completely closed the air vanes cannot draw any air, therefore encounter less
air resistance and consequently rotate at a higher velocity. Upon the casing being
opened or raised from the regulator air is again drawn by the vanes which will then
meet with greater resistance and rotate at a lower velocity. If the casing is
completely opened or removed the regulator will draw the most air or perform the
most work and therefore rotate at the slowest velocity, therefore by the displace-
ment or opening or closing of the casing the regulator and with it the driving
mechanism may be caused to run at a high or low or variable velocity.
In the drawing, Figs. 1 and 2 are respectively a sectional plan view and an
elevation of the device applied to a driving mechanism.
B is the air vane regulator driven from the driving mechanism T the speed of
which it is designed to regulate. The regulator is located within a casing G
composed of two cylindrical parts e, c', one slideable within the other the outer
cylinder in this case being supposed to be fixed. Both cylinders are provided with
openings d, or holes or slots which in a certain position are in communication or
meet one another whilst by turning the inner cylinder the apertures of the outer
cylinder may be closed either gradually or at once. If the apertures are placed
open the regulator is in a free air space and draws the maximum quantity of air
thus having to overcome the greatest resistance and running at the slowest speed.
If on the contrary, the apertures are closed the regulator is shut off from the outer
air and consequently, having little or no resistance to overcome, rotates at full
speed. The casing for enclosing the regulator at the desired times may as shewn
in Figs. 3 and 4 have the form of a drum or lid A attached to the driving
mechanism casing C so as to turn on D Fig. 3 shewing the covered or high speed

page_text: position and Fig. 4 the uncovered or low speed position. There is an opening D¹
in the casing which of course is necessary, to allow of its passage over the
regulator.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is :-
The device for regulating the velocity of spring driving mechanism consisting of
a suitably formed and arranged casing or the like enclosing the air vane regulator,
by the displacement or opening or closing of which casing the free air space open
to the regulator is shut off, diminished or augmented and thereby the velocity of
the regulator correspondingly varied, substantially as described and shewn.
Dated this 27th day of July 1894.
CAPITAINE & VON HERTLING,
89, Chancery Lane, London, W.C., Agents for the Applicant.