IMPROVE- MENTS IN AND APPLICABLE TO PRESSURE AND VACUUM GAUGES
Year: 1885

page_text: I, ARNOLD BUDENBERG of 1 Southgate Manchester in the County of Lancaster
Mechanical Engineer, do hereby declare the nature of my invention for IMPROVE-
MENTS IN AND APPLICABLE TO PRESSURE AND VACUUM GAUGES to be as follows:-
This Invention relates to pressure and vacuum gauges and has for its object to
secure a permanent record or indication of the maximum pressure or vacuum in
the vessel or apparatus to which the gauge is attached.
Hitherto it has been sought to secure such a record or indication by the use of
an independent index finger or "maximum pointer" but in the case of a sudden
increase in the amount of pressure or vacuum the maximum pointer is liable to be
jerked or thrown beyond the actual point on the graduated scale reached by the
true index finger and an excessive indication is thus given..
These Improvements consist in attaching to the index finger of the gauge a
light pen pencil or scribing point and in securing to the dial or in a plane parallel
with the dial and concentric therewith a disc of paper or other material upon
which the pen pencil or scribing point may trace a legible curve.
The disc of paper or other material may be, and by preference is, graduated to
correspond with the scale on the dial of the gauge. If the disc is placed below the
index finger a part of the disc may be cut away so as to allow it to pass the index
spindle and it may be secured in position by a spring cap, by needle points, by
catches or other suitable means.
By this arrangement the curve traced by the pen pencil or scribing point will
correspond exactly with the amount of angular motion of. the index finger and the
maximum pressure or vacuum will be correctly indicated by the end of the curve.
D

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I, ARNOLD BUDENBURG of 1 Southgate, Manchester in the County of Lancaster,
Mechanical 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:—
This Invention relates to pressure and vacuum gauges and has for its object to
secure a permanent record or indication of the maximum pressure or vacuum in the
vessel or apparatus to which the gauge is attached.
Hitherto it has been sought to secure such a record or indication by the use of
an independent index finger or "maximum pointer" but in the case of a sudden
increase in the amount of. pressure or vacuum the maximum' pointer is liable to be
jerked or thrown beyond the actual point on the graduated scale reached by the
true index finger and an excessive indication is thus given.
These Improvements consist in attaching to the index finger of the gauge a light
pen, pencil or scribing point.and in securing to the dial or in a plane parallel with
the dial and concentric therewith a disc of paper card or other suitable material
upon which the pen pencil or scribing point may trace a legible curve. The disc
of paper or other material may be, and by preference is, graduated to correspond
with the scale on the dial of the gauge. If the disc is placed below the index
finger a part of the disc may be cut away so as to allow it to pass the index spindle
and it may be secured in position by a spring cap, by needle points, by catches or
other suitable means.
By this arrangement the curve traced by the pen, pencil or scribing point will
correspond exactly with the amount of angular motion of the index finger and the
maximum pressure or vacuum will be correctly indicated by the end of the curve.
And in order that this Invention may be more readily understood and carried
into practical effect I have hereunto appended a sheet of Drawings having the
details of each of the Figures thereon marked with similar letters to denote similar
parts and reference being hereinafter had thereto.
Fig. 1 represents in front view a pressure guage having these Improvements
applied thereto and Fig. 2 gives in plan a representation of the disc of paper or
card upon which the record of maximum pressure is taken..
A is the dial of the guage, B is the disc of card or paper upon which the record
or trace is taken C is a strap connecting the spindle with the ring F and keeping
it concentric therewith, D is the index finger carrying at E a pencil or tracing
point which bears upon B and traces thereon a curve the length of which is
determined by the motion of D, F is a ring which serves to hold B in position,
G is a lock or catch, H the graduation of the gauge and K the corresponding
graduation of B.
The disc B is firmly held in position by the slot C Fig. 2 and the strap C Fig. 1
in combination with the ring F which may be in halves connected or disconnected
at G for the insertion or removal of the disc or which may be hinged or pivotted

page_text: at the outer end of C and be held or released by G. Alternatively the ring F and
strap C may be fixed to the dial and the disc be held in position by contact
therewith.
As hereinbefore described the pencil carried on the index finger traces a curve
the extremity of which indicates the extreme pressure reached. The disc may be
changed daily or at other convenient intervals and to prevent tampering therewith
the cover or front of the dial should be locked.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is,
In a pressure or vacuum gauge the adaptation and arrangement of a pencil or
scribing point carried by the index finger and a removable disc of paper or card-
board so placed or fixed upon or parallel with the dial of the gauge that the pencil
or scribing point may trace a curve thereon the extremity of which will indicate
the maximum pressure or vacuum reached, substantially as herein before set forth
and as illustrated on the accompanying sheet of Drawings.
WILLIAM E. HEYS,
Agent for the Applicant.