IMPROVEMENTS IN STEAM PRESSURE, VACUUM, AND OTHER GAUGES
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by Arnold Budenberg at the Office of
the Commissioners of Patents on the 24th May 1881. A communication
from abroad by Christian Frederick Budenberg and Bernhard August Schaeffer,
of Buckau, Magdeberg, in the German Empire.
ARNOLD BUDENBERO, of the City of Manchester, in the County of Lancaster,
Mechanical Engineer. "IMPROVEMENTS IN STEAM PRESSURE, VACUUM, AND
OTHER GAUGES." [A communication from abroad by Christian Frederick
Budenberg and Bernhard August Schaeffer, of Buckau, Magdeberg, in the German
Empire.]
The first part of this Invention bas for its object the construction of a simple
form of gauge that shall give steady and accurate readings or indications
when it is exposed to irregular motions or shaking, as, for example, on traction
engines.
In carrying out this Invention, which applies to the "Schaffer" or diaphragm
gauges, I mount the corrugated disc or diaphragm vertically at the back of and
parallel with the dial instead of in the usual horizontal position below the dial and
casing. The back of the diaphragm is enclosed by a plate, which is formed in one
piece with the tube communicating with the pressure or vacuum. The tube passes
through the circular part of the casing which does not form an essential part of the
apparatus, and serves only to protect it.
The spindle upon which the figure is mounted-carries a helical spring and pinion,
into which gears a quadrant as in ordinary gauges. The stem of the quadrant is
slotted for the reception of a pin which is fixed upon a bar pivotted at each end.
This pivotted bar is parallel with the diaphragm, and has formed upon it a projection
which passes over and at a short distance from the centre of the diaphragm. The
under part of the projecting portion of the bar is recessed out for the reception of
a sliding piece, the position of which is adjustable by means of screws. The exposed
surface of the sliding piece has formed within it a conical recess, and a piece of
metal secured to the centre of the diaphragm has also formed within it a similar
conical recess. These conical recesses face each other, and receive the two pointed
ends of a short pin. At the back of the projection is a spring which exerts a
pressure upon the ends of the short rod to retain it in position, and to restore the
indicating motion to zero on the reduction of the pressure or vacuum.
The pivotted
Prins 1

page_text: bar with the projection formed thereon, and the pin affixed thereto, performs the
function of a bell crank lever in transmitting the motion of the diaphragm through
the quadrant and pinion to the index finger.
The second part of this Invention relates to the method of adjustment, and
consists in attaching to the link which connects the bent tube of the Bourdon gauge
with the quadrant or lever a collar at the end further from the tube. The stem of
the quadrant or the lever to which the link is attached has a screw thread formed
upon it, and is provided with a sleeve tapped to gear with the screw thread. The
collar of the link is passed over the sleeve so that the latter may be rotated freely
within it. The sleeve has a flange formed upon one of its extremities, and is
provided with a nut at the other end, the collar being placed between the flango
and nut. The adjustment is effected by rotating the sleeve upon the screw in either
direction, and by thus carrying the collar and with it the link nearer to or further
from the fulcrum of the quadrant or lever. A similar arrangement may be adopted
with diaphragm gauges.