This device is an ingenious mechanism actuated by clock work and the
varying pressures of steam formed within the boiler; it records the
time and the pressure upon a revolving roll of paper and preserves an
accurate account of the varying conditions which have existed within
the boiler.
[Illustration: Fig. 105.]
The advantages derived from its use may be thus summarized: 1, It is a
monitor constantly teaching the fireman to be careful to maintain an
equal pressure of steam. 2, This uniform steam made possible by the use
of the gauge is productive of the greatest possible economy. 3, The
even strain maintained insures a long life to the boiler and a minimum
of repairs. 4, It is the vindication of an attentive and careful
fireman and allows him due credit for his skill and faithfulness, which
is too often ill appreciated for lack of a reliable record.
Although described as a boiler room fixture, where it is frequently
found in position, the proper place for this admirable device is in
the steam user’s office, thus establishing _a nerve connection_,
between engineer and owner, relating to the safety and economy of the
power-plant to their mutual great advantage.