Improvements in Alarm Attachments for. Steam Pressure Gauges.
Year: 1896

page_text: Date of Application, 27th Mar., 1896-Accepted, 6th Feb., 1897
COMPLETE SPECIFICATION.
Improvements in Alarm Attachments for. Steam Pressure
Gauges.
We, HARRY BROWNING, and WILLIAM JOHN BROWNING, both residing at
674 E. 162nd Street New York City, in the County of New York, and State of
New York, U.S.A. Masons and Builders, 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 alarm attachments for steam pressure gauges, and the
object thereof, is to provide a simple and effective alarm attachment which may be
connected with a steam pressure gauge of ordinary construction such as is usually
employed in connection with steam boilers; and with this and other objects in
view, the invention consists in the construction, combination and arrangement of
parts hereinafter described and claimed.
The invention is fully disclosed in the following spécification of which the
accompanying drawing forms a part, in which ;-
Fig. 1, is a face view of a steam pressure gauge provided with our improvement;
Fig. 2, a back view thereof; and,
Fig. 3, a side view.
In the drawing forming part of this specification, A, represents an ordinary
steam pressure gauge which may be connected with a boiler by means of a pipe a,
in the usual manner, and the face of the gauge A, is provided with the usual
scale, and the usual pointer or indicator B, and the 'back thereof as shown in
Fig. 2, is provided with a similar pointer or indicator D.
The pointers or indicators B, and D, are both mounted on the same shaft which
extends through the casing of the steam pressure gauge, and said shaft is tubular
in form, one end thereof, being shown at d, in Fig. 2, and extending thereinto or
therethrough, and revoluble therein, by hand or otherwise is a shaft E, and
secured to said shaft is an upwardly directed plate which carries at its upper end a
cylindrical casing G.
Within the casing B is a spring drum g, which is shown in dotted lines in
Fig. 2, and connected with said spring drum is a train of gear wheels, which
connect with or operate a sprocket or gear wheel 92, as shown in dotted lines in
said figure; and pivotally supported adjacent to the gear or sprocket wheel g 2 is a
lever 93, which carries an escapement 94,-which is adapted to operate in 'connection
with the gear or sprocket wheel g 2.
We also employ a crank lever H which is provided at its lower end with a
projection, and at its upper end with a head 2, and one arm of which extends
through the plate or arm f, as shown at h 3, and is provided with a rod 4, having
a projection h 5, which operates in connection with the lever 9 3.
The arm or plate F, also carries a gong K, and the lever g 3, is provided with a
ball or head k, and the projection h, at the lower end of the crank lever H, is
adapted to be operated by the pointer or indicator D, at the back of the steam
pressure gauge.
The operation will be readily understood from the foregoing description when
taken in connection with the accompanying drawing and the following statement
thereof. In practice, the arm or plate F, is turned to the point on the scale which

page_text: indicates the pressure it is desired to carry, for instance, if it is desired to carry a
pressure of 90 pounds, the plate or arin F, is turned so that it will cover the
90 pound mark or point on the scale and when the pointer or indicator D, passes
this point, the projection h, on the lever H, will be operated thereby so as to
break the connection of the extension h 5, of the rod h 4, with the lever g 3, and the
latter will at once be operated by the spring g, and its train of gear wheels, to
sound the alarm, it will be understood of course, that the arm or plate F, may be
turned to any desired point on the scale at the back of the steam pressure gauge,
and that the operation will be the same as above described. The pointer or
indicator D, always serving to operate the alarm when the pressure passes the
desired point.
This device is simple in construction and operation, and comparatively inexpensive,
and also perfectly adapted to accomplish the result for which it is intended, and
being also applicable to almost any form of steam pressure gauges now in use, and
it is evident that changes in, and modifications of the construction herein described,
may be made without departing from the spirit of our invention or sacrificing its
advantages, and we reserve the right to make all such alterations therein, and
modifications thereof, as fairly come within the scope of the invention.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The combination with a steam pressure gauge, provided with a scale on its
front and back, and with pointers or indicators which operate jointly, of an alarm
which is connected with a shaft revolubly mounted in said gauge, said alarm con-
sisting of a casing provided with a spring drum and gear wheels in operative
connection therewith, and a lever which is adapted to operate an alarm gong, the
support of the alarm casing being also provided with a crank lever, which is
adapted to hold the lever by which the gong is supported out of connection there-
with, said crank lever being adapted to operate by one of the pointers or indicators
substantially as shown and described.
2. The combination with a steam pressure gauge provided with the usual scale
and pointer or indicator, of an alarm which is connected therewith, and adapted
to be turned to any point on the scale, said alarm comprising a gong, and operative
devices which are adapted to be set in motion when the pointer or indicator
reaches the point at which the alarm is set, substantially as shown and described.
3. A steam pressure gauge provided with a scale and pointer or iudicator, on
its front and back, said pointer or indicator on each side being mounted on the
same shaft, and operated jointly, and an alarm device being connected with a lever
or arm which is revoluble, independent of the pointers or indicators, and which is
adapted to be set at any desired point, on the scale, said alarm device being
adapted to be operated by one of the pointers or indicators, when it reaches the
point at which the alarm is set, substantially as shown and described.
Dated this 26th day of March 1896.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.