Steam-Boiler Indicator. Page: 6 of 7
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1,095,1 2
plate into registration with the alining aper-
tures 24 and 30. Thus, the steam within the
chamber 4 is permitted to pass through the
whistle 20 by way of the pipe 19 and so sound
5 the alarm, the tone of the whistle 20 advis-
ing the engineman that the water within the
boiler has dropped below the normal level.
Having been thus advised, the engineman
will, of course, put the pump or injector
10 into service to restore the water level to
normal and as the water rises within the
boiler the float 13 is elevated to close the
valve within the casing 9 and so shut off
the flow of steam into the chamber 4. When
15 the flow of steam within the chamber 4 is cut
off, the spring 18 reacts and so forces the
piston 17 downwardly. As the valve within
the casing 9 closes, motion is imparted to
the valve 40 through the medium of the link
20 42 and handle 41 to open the latter valve
whereby the steam will be forced out of the
chamber 4, under the action of the piston 17,
and spring 18, and through the whistle 44,
thereby sounding the latter and notifying
25 the engineman that the water level within
the boiler has been restored to normal. In
the downward movement of the .piston 17
under the action of the spring 18, the pins
36 carried by the arms 34 and 35 of the yoke
30 33 idle Over the spring dogs 37 and 38 there-
by permitting the controlling valve 21 to
remain inactive in the downward movement
of the actuating device, it of course being
understood that the springs 31, 31 restore the
35 sector-like plates 25 and 26 of the control-
ling valve to normal position after the piston
17 has been elevated within the chamber 4
a certain distance.'
Extending outwardly through the side
40 wall of the chamber 6 at diametrically op-
posite points are pipes 46, 47 equipped at
their outer ends with whistles 48, 48 of rela-
tively different tones. The inner end of each
pipe 46 is projected downwardly within
45 the chamber 6, as clearly illustrated in Fig.
2 of the drawings, and has slidably mounted
thereon an angular pipe 49 having the verti-
cal limb thereof provided with an outwardly
extending guide shoe 50 designed to slide
go within a guideway 51 suitably secured to the
inner wall of the chamber below the respec-
tive pipe. Swiveled or otherwise connected
to the horizontal member of each angular
pipe 49 is a regulating screw 52 threadedly
55: engaging the wall of an aperture 53 formed
in the lower cap 3 and equipped, exteriorly
of such cap, with a manipulating head 54.
Mounted upon the free end of the horizontal
limb of each pipe 49 is a controlling valve
60 55, the controlling valve on the pipe 49 con-
nected to the pipe 47 being identical in con-
struction to the valve 21 hereinbefore de-scribed, while the valve on the pipe 49 con-
nected to the pipe 46 is constructed similarly
65 to the other valve 55 but has the apertures 29and '30 in the sector-like plates 25 and 26
respectively disposed below one another and
the aperture 24 so that communication will
be established between the chamber 6 and
the whistle 48 on the pipe 46 when the rela- 70
tively large ends of the sector-like plates of
the valve swing upwardly. Depending from
the piston 17 within the chamber 6 are actu-
ating devices 56, 57, each of a construction
identical to that of the actuating device 75
hereinbefore described. The actuating de-
vice 56 is designed to operate the valve 55
controlling .the pipe 46 on the up stroke of
the piston 17, while the device 57 actuates
the respective valve on the down stroke of 8o
such piston. These whistles 48, 48 are de-
signed to sound an alarm in accordance with
the fluctuations of the steam pressure with-
in the boiler and the cap 3 is provided with
a depending nipple 58 adapted to be con- 85
nected to the steam space of the boiler so
that the chamber 6 will. be in communica-
tion with such space and the piston 17 held
in normal position against the action of the
spring 18. Should the steam pressure-with- g9
in the boiler fall below the predetermined
number of pounds, the piston 17 within the
chamber 6 will move downwardly under the
action of the spring 18 and the actuating
device 57 operate the valve 55 controlling 95
the flow pf steam through the pipe 47 where-
by thesteam will pass- through the pipe 47
and into the whistle 48 and sound the latter
so as to warn the -angineman. On the con-
trary, should the steam pressure rise, the pis- 100
ton 17 will move upwardly against the action
of the spring 1 and the actuating device
56 open the valve 55 with the effect to place
the whistle 48 in, communication with the
chamber 6 by way, of the pipe 46. Thus, the 105
engineman will be advised as to the steam
pressure. A suitable pressure gage .59 is
preferably tapped onto the chamber 6 so
that the pressure within the boiler -may be
at all times ascertained. ii1
. From the foregoing description taken in
connection with the accompanying drawings,
the construction, mode of operation and
manner of employing my invention will be
readily apparent. It will be seen that I 115
have provided a steam boiler indicator
whereby the engineman will be automati-
cally advised when the water within the
boiler falls below the predetermined level,
whereby a signal will be given when the 120
water level has been restored to normal,
and whereby the engineman will be advised
when the pressure of the- steam within the
boiler has increased or decreased.
Whil I have herein shown and described 125
one preferred form of my invention by way
of illustration, I desire to have it under-stood that I do not limit or confine myself
to the precise details of construction herein
described and delineated, as modification 130a
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Marrs, Vollie B. Steam-Boiler Indicator., patent, April 28, 1914; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth860086/m1/6/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.