An Electric Alarm Attachment for Pressure, Vacuum, Speed, and other Gauges.
Year: 1889

page_text: Date of Application, 10th May, 1889
Complete Specification. Left, 10th Feb., 1890-Accepted, 10th May. 1890
PROVISIONAL SPECIFICATION.
An Electric Alarm Attachment for Pressure, Vacuum, Speed, and
other Gauges.
ARTHUR JULIAN Church Street Basingstoke Ironmonger do hereby declare the
nature of this invention to be as follows :—
This invention relates to pressure, vacuum, speed, or other gauges, having attached
thereto an electrical alarum, and battery: in such a manner that the alarum shall be
sounded, upon the gauge registering a certain pressure, vacuum, or speed.
To the hand, or marker (or when preferred to the spindle carrying the hand or
marker) of a pressure, vacuum, speed, or other gauge, is attached an arm, spring, or
lever forming one terininal of an electrical circuit. In the said circuit there is to be
an electrical bell, or other alarm, by an electric current.
The other terminal of the circuit consists of a stud, which is movable, to any pres-
sure, vacuum, or speed, or other device affixed to the gauge, in the path of the said
arm, marker, spring, or lever and adjustable to any vacuum, speed, or pressure, for
which the gauge is adapted.
When the pressure vacuum or speed is reached at which the adjustable stud is set,
the arm, spring, or lever or marker forming one end of tho said electrical circuit
comes into contact with the said stud, forming the other termina!; the contact of the
two terminals completing the said electrical circuit and sounding the alarm and
thereby facilitating the prevention of accidents and damage caused by over pressure
vacuum or speed to which the said gauge is adapted.
Dated this 9th day of May 1889.
COMPLETE SPECIFICATION.
An Electric Alarm Attachment for Pressure, Vacuum, Speed, and
other Gauges.
ARTHUR JULIAN Church Street Basingstoke Ironmonger 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 :—
My Invention relates to an Electric Attachment to Pressure Vacuum Speed and
other gauges and its object is to provide means whereby an alarm shall be given when
the index of the gauge has reached a predetermined limit.
I
proposo to carry out the above as follows :-
-
In the Dial of the Gauge cut a slot B B in which an adjustable stud C works
this stud can be adjusted to and fixed at any point in the slot B B. The point at
which the stud C is set determines the pressure vacuum speed &c. at which the gauge
shall give an alarm.
This stud is connected by a wire A to one pole of a battery. The index hand
which is connected to the other pole has an arm or wire probably of platinum attached
to it. The arm D and the stud C now form the terminals of an electric circuit in
which a bell or other alarm can be fixed. When the arm D comes into contact with
the stud C the circuit will be completed and the alarm sounded thereby giving notice
that the predetermined limit has been reached.

page_text: 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
An attachment to pressure vacuum, speed and other gauges for sounding an alarm
by means of electricity.
ARTHUR JULIAN.