AN IMPROVED DYNAMOMETRIC SPEED REGULATOR OR GOVERNOR
Year: 1873

page_text: PROVISIONAL SPECIFICATION left by Augustė. Jacquemin, at the
Office of the Commissioners of Patents, with his Petition, on the
8th May 1878.
I, AUGUSTE JACQUEMIN, junior, of Paris, Department of the Seine,
in the Republic of France, do hereby declare the nature of the said
Invention for "AN IMPROVED DYNAMOMETRIC SPEED REGULATOR OR GOVERNOR,"
to be as follows:-
My improved regulator or governor is composed of a shaft A (see
Figures 1 and 5 of the accompanying Sheet of Drawing), upon which
is keyed the plate B. This shaft is driven by the motor which is to be
regulated. The shaft A further carries a fly or heavy mass V set to
move with slight friction on this shaft, and furnished with wings or
paddles P (Figures 1 and 5).
The plate B (Fig. 5) communicates its rotary motion to the fly V by
means of the spring R. (Figures 1 and 5), the two ends of which end in
two small sockets, the one attached to the plate B by the pin g, the
other set on the pin g¹ of the fly V.

page_text: The shaft A communicates with the steam inlet apparatus by the
double cone F, F, by means of a longitudinal groove, into which
penetrates the key c (Fig. 4).
The double cone is movable with slight friction, and may slide in the
direction of its length in order to submit the simple cone F to the t
action of one of the two cones F or F¹, accordingly as the departure
from the regulation speed necessitates a variation of the motive power
to open or close the steam inlet apparatus placed in connection with the
shaft A, either by toothed gearing, endless screw, or otherwise, whether
for expansion gear, or a butterfly valve for example, or a screw with nut,.]
or if it is a valve or slide valve which is to be displaced.
These two parts have this in common that they are both driven by
the shaft A and differ.
1°. In that the fly V cannot move upon the shaft A in the direction of
its length, but is susceptible of a certain motion around this latter,
accordingly as the spring R which draws it may give in one direction or
the other.
2º. That the double cone F, Fª, cannot move around the shaft. A, but
may on the contrary slide in the direction of its length. Its position, in
this sense variable, is determined as follows:-The shaft A is pierced
interiorly, and a rod T is fixed to the double cone F, F¹, by means of a
key or of a screw c, o¹, (Figures 4 and 5), and in order not to do away
with the longitudinal movement of this latter a mortice m (Fig. 5) is
made in the shaft A. The other extremity of the rod T is screw
threaded and fits so as to move with slight friction in the nut E, which
is fixed to the socket of the fly V.
•
The working of my improved dynamometric regulator or governor will
now be easily understood. The spring R gathers the resistance which
the mediums bring upon the wings or paddles of the fly V in its rotary
movement. It weighs and measures this resistance, which differs for

page_text: each speed, growing as the square of the speed, and thus fixes with
precision a position of the regulating fly for each speed. These different
positions of the fly around the shaft A determine corresponding ones in
the length of the shaft for the double cone F, F, the nut E of the fly
shifting under the variations of this latter the rod T of the double conė.
th
In order however to lessen as much as possible a time lost in the com-
munication of the movement from the regulator to the apparatus for
inlet of steam which abut upon the simple cone F, I have reduced it
to scarcely 1/2 of an inch (1 millimetre). It results therefrom that it is
b. the shaft A which must occupy a distinct position for each speed. I
have therefore completed this system by an apparatus which I term the
speed indicator, and which is composed of a nut screw having placed
upon it a small indicating plate I which by means of divisions made in
front of the index G indicates exteriorly in one way the various speeds.
; These divisions will be determined by experience, and will permit the
speed to be given to the engine to be fixed at once. One of the
advantages of this arrangement is that the indicator acts during the
working.
66
My improved dynamometric regulating fly or governor may be defined.
) as a mass in the physical sense of the word, whether of ono piece or of
several united in any way and submitted to particular actions, such as
gravity, elasticity, or others, as in ball governors for example, which are
driven by toothed gearing or by bands.
To avoid difficulties of execution and prevent the tempered parts
5 becoming fragilo, I have suppressed the rotary friction of the shaft A.
(Fig. 5) as regards the collars. These collars are formed by two jackets-
or coupling boxes M, M³, (Fig. 5), that M carrying the driving pulley
of the governor and being held in its placo by the stopper H, which at.
the same time prevents leakage of oil. The other jacket M¹ is stopped
) by the socket in which turns the indicator of speed, which also contains
the oil required by this jacket.
The nut K of the indicating plate or dial not communicating with the
exterior forms an excellent oil reservoir; and in order that the screw U
may never clutch or tighten on axle J formed by a shoulder on shaft A
; a certain number of holes are made to permit the oil to come from the
exterior to its centre. This screw does not turn and therefore it has a
longitudinal groove into which penetrates a key fixed in the stop ring ;-

page_text: the hole of which is of the diameter of the screw U.
loss of time two nuts o, o¹, end the shaft A.
Finally, to prevent
The conditions of a proper lubrication are not less observed as regards
the nut E of the regulating fly. The end of the rod T forms a boss
which is screw threaded and bathed in the oil which cannot escape from
the nut E. To oil the nut E it is only necessary to partly unscrew the
stopper q which ends this nut until the holes is exposed, taking care
that this hole is upwards.
To unship the shaft A without removing the regulating fly it is only
necessary to remove the key of the double cone F, F¹, and to place the
groove made in the entire length of this shaft, so as to correspond with
the key of the nut screw U, by then unscrewing the indicating plate I
and withdrawing the screw U the shaft A may be pulled out without
difficulty. There remains but the jackets or clutch boxes M, M³, the
section of which (Fig. 2) shows the key fixed. I do not describe the 1
exterior form of the frame of my regulator or governor as it will depend
upon the machine to which it is applied. This description refers to
cases in which the motive power may and must vary to equal the
working resistance; it is the case of steam engines, hydraulic engines,
and others. In that in which the motor is one of those known generally a
as secondary motors, such as springs or weights, it is by an additional
and variable resistance, a brake for example, that the equilibrium
between the motive power and the resistance is obtained, so that the
speed may be uniform by the destruction or rather the transformation
of the acceleration into useful work. To obtain this result the double 1
cone F, F", becomes useless and the apparatus as a whole takes very
small proportions.
The rod T acts upon a brake which may come very near the carrying
plate and even become part of it. A. similar arrangement may be
applied to chronometrical instruments, telegraph apparatus, turnspits,
and in short to every apparatus set in motion by secondary motors and
requiring a uniform speed.

page_text: 2º. On the arrangements for the indication exteriorly and during the
working of the various speeds to be given to the motors, as complement
to the use of elasticity applied to inertia and to render its practical
application inore convenient.
3º. On studied arrangements providing against wear and fragility to
prevent any disturbances of the precision which characterises my
dynamometric regulator or governor.
application more convenient.
3º. On studied arrangements providing against wear and fragility to
prevent any disturbances of the precision which characterises my
dynamometric regulator or governor.