IMPROVEMENTS IN STEAM PRESSURE, VACUUM, AND OTHER GAUGES
Year: 1876

page_text: LETTERS PATENT to Arnold Budenberg, of the Firm of Schäffer & Budenberg,
A
of the City of Manchester, Steam Gauge Manufacturers, for the Invention of
"IMPROVEMENTS IN STEAM PRESSURE, VACUUM, AND OTHER GAUGES."
communication from abroad by Bernhard August Schäffer and Christian
Frederick Budenberg, of Buckau, Magdeburg, in the Empire of Germany.
.
PROVISIONAL SPECIFICATION left by the said Arnold Budenberg at the
Office of the Commissioners of Patents on the 11th February 1876.
ARNOLD BUDENBERG, of the Firm of Schäffer & Budenberg, of the City of
Manchester, Steam Gauge Manufacturers. "IMPROVEMENTS IN STEAM PRESSURE,
VACUUM, AND OTHER GAUGES." A communication from abroad by Bernhard
August Schäffer and Christian Frederick Budenberg, of Buckau, Magdeburg, in
the Empire of Germany.
The first part of this Invention has for its object the simplification of the con-
struction of gauges, whereby the first cost of such instruments is reduced, and at
the same time the working mechanism is rendered steadier and more perfect in
action.
"
In carrying out this Invention, and as applied to "Bourdon" gauges, I mount the
spindle upon which the index finger is secured, and also the quadrant when one is
employed, upon a projection from the same casting which carries the Bourdon "
tube, and upon which casting the screwed connection is made, and thus I dispense
with the necessity of having the bearings for the index finger and for the
actuating mechanism secured to the casing of the gauge, or to the dial, as
hitherto practised. And in the case of diaphragm gauges I construct the upper
flange which encases the diaphragm, the circular part of the gauge casing, together
with a hollow pedestal upon the top of which the index finger and actuating
mechanism are mounted, all in one casting, whereby the cost of manufacture is con-
siderably reduced, and at the same time greater steadiness of action is ensured.
Secondly. These improvements relate to gauges the dials of which are marked
in duplicate, and provided with two index fingers, and consist in the employment of
a single "Bourdon" tube for actuating both index fingers, such "Bourdon" tube
being supported equidistant from its extremities upon the same casting which
Prins Cli

page_text: carries the index spindles, and actuates mechanism, which in this respect is the
same as that described under the first part of this Invention. I am thus enabled to
connect an index finger to each extremity of the "Bourdon" tube and impart a
perfect revolution to such index fingers, which indicate upon two distinct and entire
dials instead of upon half of the main dial as hitherto practised. This construction
of gauge with two distinct dials is sometimes made with distinct "Bourdon" tubes
for cach index finger, but carried from one and the same support; and in some cases
arrange one dial of a duplicate gauge as a vacuum, and the other as a pressure
gauge. I also make the inlet to "Bourdon" gauges at the top, and am thus enabled
to fill the tube with glycerine, oil, or petroleum to preserve the parts more
perfectly.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Arnold Budenberg in the Great Seal Patent Office on the 11th August
1876.
ARNOLD BUDENBERG, of the Firm of Schäffer & Budenberg, of the City of
Manchester, Steam Gauge Manufacturers. "IMPROVEMENTS IN STEAM PRESSURE,
VACUUM, AND OTHER GAUGES." A communication from abroad by Berunard
August Schäffer and Christian Frederick Budenberg, of Buckau, Magdeburg, in
the Empire of Germany.
The first part of this Invention has for its object the simplification of the con-
struction of gauges, whereby the first cost of such instruments is reduced, and at
the same time the working mechanism is rendered steadier, and more perfect in
action.
In carrying out this Invention as applied to Bourdon gauges I mount the
spindle upon which the index finger is secured, and also the quadrant when one is
employed, upon a projection from the same casting which carries the "Bourdon"
tube, and upon which casting the screwed connection is made, and thus I dispense
with the necessity of having the bearings for the index finger and for the actuating
mechanism secured to the casing of the gauge, or to the dial, as hitherto practised.
And in the case of diagragin gauges I construct the upper flange which encases
the diaphragm, the circular part of the gauge casing, together with a hollow
pedestal upon the top of which the index finger and actuating mechanism are
mounted, all in one casting, whereby the cost of manufacture is considerably reduced,
and at the same time greater steadiness of action is ensured.
Secondly. These improvements relat to gauges the dials of which are marked
in duplicate, and provided with two index fingers, and consist in the employment of
a single "Bourdon" tube for actuating both index fingers, such "Bourdon" tube
being supported equidistant from its extremities upon the same casting which
carries the index spindle and actuating mechanism, which in this respect is the
same as that described under the first part of this Invention. I am thus enabled to
connect an index finger to each extremity of the "Bourdon" tube, and impart a
perfect revolution to such index fingers, which indicate upon two distinct and entire
dials instead of upon half the main dial, as hitherto practised. This construction of
gauge with two distinct dials is sometimes made with distinct "Bourdon" tubes for
each index finger, but carried from one and the same support; and in some cases I
arrange one dial of a duplicate gauge as a vacuum, and the other as a pressure
gauge. I also make the inlet to "Bourdon" gauges at the top, and am thus
enabled to fill the tube with glycerine, oil, or petroleum to preserve the parts more
perfectly.
And in order that this Invention, communicated to me as aforesaid, may be more
readily understood and carried into practical effect, I have hereunto annexed a
Sheet of Drawings illustrative of the Invention, and will now proceed to describe
the same, reference being had to such Drawings, and the letters of reference marked
thereon.

page_text: Fig. 1 is a front view (with the dial removed), and Fig. 2, a side sectional view
of a "Bourdon gauge," shewing the improvements applied thereto.
Fig. 3 is a modification of Fig. 1.
Fig. 4 is a front view; and Fig. 5, a sido sectional view, shewing the improve-
ments applied to diaphragm gauges; Fig. 6, a front view (with half the dial
removed); and Fig. 7, a side sectional view on the line a, b, (Fig. 6) of a compound
or duplicate gauge constructed in accordance with this Invention.
In all the views similar letter of reference are used to denote similar parts, and
all the view are drawn about full size.
In Figs. 1, 2, and 3, A is a brass casting or piece which is attached to the outer
casing of the gauge by the set screws A' and A2, the lower extension B being
screwed for connecting the gauge in the ordinary manner. The " Bourdon'
tube C is attached to the upper extension D, which upper extension also receives a
pair of brackets E and E¹, upon which the spindle F carrying the index finger G
and the spindle carrying the quadrant H are mounted. In Fig. 3 the quadrant H
is dispensed with, and the "Bourdon" tube connected direct to the spindle of the
indicating finger G, which spindle is carried, as herein-before described, upon the
top of the brass piece A. It will thus be seen that all the working parts in this
construction of "Bourdon" gauge are attached to the same casting which carries
the "Bourdon" tube, by which the construction of the gauge is much simplified,
the cost of manufacture reduced, and greater steadiness and more perfect action
obtained than is possible when the bearings of any of the working parts are attached
to the casing or dial of a gauge.
In Figs. 4 and 5, which illustrate the improvements as applied to diaphragm
gauges, the upper flange I of the diaphragm case is cast in one piece with the outer
rim J of the gauge case and a hollow pedestal K. To this pedestal Ka pair of
brackets K and K are attached (by the set screws K³ and K), and which carry
the spindle L of the indicating finger and the quadrant M. In this modification the
same desirable features of simplicity of construction, steadiness of working, and
permanency of indication are attained, and the compactness of the parts render
this class of gauge very suitable to be used in the construction of illuminated
gauges, for which Letters Patent were granted to me on the Twenty-eighth day
of July 1874, One thousand eight hundred and seventy-four, Number 2031, and
the gauge is here illustrated with a transparent back in accordance with that
Invention.
In Figs. 6 and 7 I illustrate a compound or double gauge constructed in accord-
ance with this Invention. One half the dial is removed so as to expose the working
parts; and it must be understood that the working parts covered by the graduated
dial are a duplicate of the parts exposed. As in the preceding modification all the
working parts are carried from one main casting or piece N, the "Bourdon" tube
being attached to such casting equidistant from its extremities, and the index
finger and quadrants carried in substantially the same manner as described in
reference to the preceding Figures, that is, they are entirely supported upon the
main casting or picce N, and not in any way carried by the gauge casing or dial.
This construction of double gauge enables each of the index fingers to make a com-
plete revolution upon a distinct and independant dial, and not half a revolution as
heretofore, the practise in the construction of double gauges. For this purpose the
spindles of the fingers pointers are set eccentric to the centre of the gauge casing,
the construction of the working parts greatly facilitating this arrangement.
Instead of a single "Bourdon" tube held in the middle, as illustrated, it will be
obvious that two complete "Bourdon" tubes might be employed, carried from one
and the same support N; but this I should consider a modification of the Invention,
and in this latter case one of the dials might be arranged as a vacum gauge, and
the other as a pressure gauge, in which case two distinct inlets would be provided.
By inverting these "Bourdon" gauge, and making the inlet at the top instead
of at the bottom, as illustrated, the tube may be filled with glycerine, oil, or
petroleum, or other preservation fluid to preserve the parts more perfectly.

page_text: I claim,
1st. The method of constructing "Bourdon" and diaphragm gauges whereby all
the working parts are supported from one main piece or casting, and entirely
distinct from the gauge, casing, or dial, the inlet being either at the top or bottom,
substantially as and for the purpose described and illustrated on the accompanying
Drawing.
2nd. As applied to diaphragm gauges forming the upper part of the diaphragm
case, the outer rim of the dial casing, and a hollow pedestal for carrying the indi-
cating mechanism in one and the same casting.
3rd. As applied to the construction of compound or double gauges the method of
arranging the pointers eccentric with the main dial, so as to enable them to make a
complete revolution, whether for a duplicate indication of the pressure or for
pressure and vacuum, substantially as and for the purposes described and illustrated
in the accompanying Drawing.
In witness whereof, I, the said Arnold Budenberg, have hereunto set my
hand and seal, this Tenth day of August, in the year of our Lord 1876.
ARNOLD BUDENBERG. (L.S.)