Year: 1886

page_text: Date of Application, 17th Mar.; 1886.
Complete Left; 3rd Dec., 1886.
Complete Accepted, 5th Jan., 1887.
I WILLIAM PHILLIPS THOMPSON Fel: Inst. P. A. of the Agency for Foreign Patent
Solicitors. 6 Lord Street Liverpool in the county of Lancaster and 323. High Holborn
in the county of Middlesex Civil Engineer do hereby declare the nature of this inven-
tion to be as follows:-
The object of this invention is a system of metallic manometer presenting over
analogous apparatus known at the present day, the important advantages of durability
and of economy resulting from its mode of construction.
The manometers on this system indicate with a very great sensitiveness and a
mathematical precision, the variations, increases or diminutions, of pressure that may
take place in a steam boiler, a compressed air reservoir, or any other apparatus con-
taining a fluid under pressure.
These apparatus have, moreover, the advantage of indicating with a perfect exactitude
the pressures in kilograms, atmospheres, etc.; the dials, printed beforehand on enamel,
are all identical, as are also the different parts of the mechanism, in case of accident a
dial may be replaced without it being necessary to regulate the apparatus afresh.
In order that the invention may be better understood, I have represented on the
annexed drawing, but only by way of a sample, a manometer on this system.
In the drawing, Fig. 1, shows a front view of the mechanism.
Fig. 2, is a section made on the line 1-2 of Fig 1.
In these figures the same letters of reference designate the same parts.
As is represented on the drawing, the vapour enters a conical or spherical cavity
from the piece J united by several screws or pins with the flange of the manometer,
these two surfaces enclose a hermetical joint or ring of lead penetrating into two
eircular grooves of the same diameter-on each of the two surfaces, between which is
also held a diaphragm I of copper, receiving directly the pressure exercised in the
cavity of the piece J.
A disc H of tempered steel bears on this diaphragm, it is maintained at its edge by
the flange of the manometer, which is hollowed out interiorly in such a manner to

page_text: allow the disc H freedom to take a curve of a millimetre in the centre of its circum-
ference. In the centre of this disc is made an opening closed by a step a¹, this opening
has the property of giving to the disc H a perfect sensitiveness and a constant regularity
in its flexion, which permits, with the aid of transmission of the movement to the
indicating needle, of obtaining a graduation always in equal parts.
The diaphragm I is sustained over its whole surface on the disc.
The central stem A is supported at its base by the step a', which follows exactly the
movement that the pressure exerts on the diaphragm and on the disc. This stem A of
steel is terminated at its extremity by a conical cavity in which engages the point of a
screw C of tempered steel, fixed to the small arm of the elbowed or rocking lever B
which has two unequal arms. With this arrangement, a person can limit to a milli-
metre the movement of the small arm whilst allowing to the large arm, that controls
the needle, a sufficiently ample movement.
The rocking lever B is supported by two pointed screws C₁ of tempered steel, fixed
on a piece D which is screwed to the back of the box of the apparatus, it oscillates
freely on these two steel screws. A little spiral spring el, attached to the piece D,
maintains it on its point of oscillation, a second spiral spring attached to the large
arm of the rocking lever B serves to restore it to its point of departure, the small arm
being supported on a piece fixed in the box of the apparatus.
The small connecting rod F is articulated and bound at each of its extremities, on
the one side to the large arm of the rocking lever B, and on the other to the crank G
bearing the indicating needle.
With this arrangement, the crank G follows its circular movement which the large
arm of the rocking lever B imparts to it, and causes the needle to traverse the extent
of the graduated scale on the dials either in kilograms or atmospheres, &c.
A second support E of brass is screwed into the back of the box of the apparatus
and serves to support at its end a little pin or axis of the needle, a hole g' is pierced
in this support to allow of the central stem A passing freely through.
Fig. 3, shows a modification of the above described movement and in which the
movement of the rocking lever B is made upon steel tempered knives m oscillating in
grooves of a support D. This arrangement of centres oscillating on knives or on
pointed screws permits of ascertaining the slightest variations of pressure, either at the
minimum or at the maximum of the indicating scale. There is also represented in
Fig. 2 a regulating crank G¹ with an adjusting screw in order to sensibly augment or
diminish the course of the needle in relation to the tension of the spring or disc H.
This crank G may be applied to all these manometers.
It is clearly understood that the forms or dimensions and the constituent materials
of the different parts of the apparatus may be varied without limit and without altering
the principle of it, and also the details of construction and of arrangement of the divers
organs.

page_text: [A communication from abroad by HENRI MIGNOT, Horologist, 34 Rue Gauthey, Paris.]
I WILLIAM PHILLIPS THOMPSON, Fel. Inst. P.A. of the Agency for Foreign Patent
Solicitors, 6 Lord Street, Liverpool, in the County of Lancaster, and 323 High
Holborn, in the County of Middlesex, Civil Engineer, 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 object of this invention is a system of metallic manometer, presenting over
analogous apparatus known at the present day, the important advantages of durability
and of economy resulting from its mode of construction.
The manometers on the system indicate with very great sensitiveness and mathe-
matical precision, the variations, increases, or diminutions, of pressure that may take
place in a steam boiler, a compressed air reservoir, or any other apparatus containing
a gas or fluid under
pressure.
These apparatuses have, moreover, the advantage of indicating with perfect exactitude
the pressures in kilograms, atmospheres, etcetera, the dials printed beforehand on
enamel, are interchangeable, as are also the different parts of the mechanism, so that in
case of accident a dial may be replaced without it being necessary to regulate the
apparatus afresh.
In order that the invention may be better understood, there is represented in the
annexed drawing, but only by way of a specimen, a manometer on this system.
In the drawing, Figure 1 shows a front view of the mechanism.
Figure 2 is a section on the line 1-2 of Figure 1.
In these figures the same letters of reference designate the same parts.
As is represented in the drawing, the steam passes into a conical or spherical cavity
of the piece J secured by several screws or rolls to the flange of the manometer, these
two surfaces enclosing a hermetical joint or ring of lead, fitting into two circular
grooves of the same diameter on each of the two surfaces, between which is also held a
diaphragm I of copper, receiving directly the pressure exercised in the cavity of the
piece J.
A disc H of tempered steel bears on this diaphragm, it is maintained at its edge by
the flange of the manometer, which is hollowed out internally, in such manner as to allow
the disc freedom to take a curve of a millimetre, from the centre to the circumference.
In the centre of this disc is made an opening closed by a footstep a¹, this opening has
the property of giving to the disc H a perfect sensitiveness, and a constant regularity
in its flexion, which permits, with the aid of transmission of the movement to the
indicating needle, of obtaining an uniform graduation.
The diaphragm I rests with its whole surface on the disc.
The central rod A is supported at its base by the footstep a which follows exactly
the movement that the pressure exerts on the diaphragm, and on the disc. This rod A
of steel is terminated at its extremity by a conical cavity in which engages the point

page_text: of a screw C of tempered steel, fixed to the short arm of the elbowed lever or indicator B
which has two unequal arms. With this arrangement, a person can limit to a milli-
metre the displacement of the short arm whilst allowing to the long arm, that controls
the needle, a movement of sufficient amplitude.
The rocking lever B is supported by two pointed screws C₁ of tempered steel, fixed
on a piece D which is screwed to the back of the box of the apparatus, it oscillates
freely on these two steel screws. A little spiral spring e¹ attached to the piece D,
maintains it on its points of oscillation, a second spiral spring fattached to the large
arm of the rocking lever B serves to restore it to its point of departure, the small arm
being supported on a piece d¹ fixed in the box of the apparatus.
The small connecting rod F is articulated and bound at each of its extremities, on
the one side to the long arm of the rocking lever B, and on the other to the crank G
bearing the indicating needle.
With this arrangement, the crank G possesses a circular movement imparted to it
by the motion of the long arm of the rocking lever B, and causes the needle to travel
along the scale on the dials, graduated either in kilograms or atmospheres, etcetera.
A second support E of brass is screwed into the back of the box of the apparatus,
and serves to support on its summit a little pin or axis of the needle, a hole g¹ is pierced
in this support to allow of the central stem A passing freely through.
Figure 3 shows a modification of the above described movement, in which the
movement of the rocker B takes place upon steel. tempered knife edges m, oscillating
in grooves of a support D'. This arrangement of centres oscillating on knife edges or
on pointed screws, allows the indication of the smallest variations of pressure, either at
the minimum, or at the maximum of the indicating scale, there is shewn also in
Figure 2 a regulating crank G¹ with an adjusting screw in order to sensibly augment
or diminish the course of the needle in relation to the tension of the spring or disc H.
This crank G may be applied to all these manometers.
It must be clearly understood that the forms or dimensions, and the constituent
materials of the different parts of the apparatus may be varied without limit, without
altering the principle of it, as also the details of construction and of arrangement of
the divers organs.
Having now particularly described and ascertained the nature of the said invention,
and in what manner the same is to be performed, as communicated to me by my
foreign correspondent, I declare that what I claim is :-
The system of metallic manometer substantially as above described, and shewn in
the annexed drawing, in which the variations of pressure acting by means of a
diaphragm I on a round spring or dise H of tempered steel, furnished in the centre
with an opening, for the purpose of augmenting its sensitiveness, and of obtaining
uniformity in its flexion, the said opening forming a place for a footstep a which
follows the motion of the disc in order to transmit it by means of the central rod A to
the elbowed or rocking lever B which serve to transmit the motion to the indicating
needle, and to increase. the movement of the latter, in the manner above described and
shewn in the annexed drawing..
WM. P. THOMPSON & Co.,
Agents for the Applicant.