Year: 1886

page_text: Date of Application, 23rd Aug., 1886
Complete Left, 24th Nov., 1886.
Complete Accepted, 5th Jan, 1887.
I ROBERT JONES 29 Saint Luke Street Hanley Staffordshire Printer do hereby
declare the nature of this invention to be as follows:-
That this Invention-is intended for the purpose of protecting life and property
caused by boiler explosions. It will show when the valves of a boiler have been pressed
down in any way.
The Invention itself will be formed by placing another finger on the dial of the
Indicator and which will be pushed round by the other; when on its return the former
one will remain stationary this indicating the amount of pressure carried by the boiler.
Reference to the drawings accompanying the enclosed.
No. 1. Showing the formation of small finger with spring attached as it will appear
on the pressure gauge.
No. 2. Large finger and small one, also showing the action of large finger on
small one.
No. 3. Small cog wheel one sixteenth in thickness which will be fastened to the centre
of dial.
No. 4. Small finger with spring attached; also showing formation in centre where
large finger will catch in order to push it round the dial.
No. 5. Showing formation of large finger.
No. 6. 'Small finger, side view showing formation by which it 'travels “round**the*
wheel.
No: 7. Sniall spring one sixteenth wide.“*

page_text: I ROBERT JONES 11 Smith Street Hanley Staffordshire Printer do hereby declare
the nature of my invention for AN IMPROVEMENT IN PRESSURE GAUGES and in what
manner the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
That this invention is intended for the protection of life and property caused by
boiler explosions. In the first place it will without fail show when the valves of a
boiler have been weighted, screwed down, or overpressed in any way whatever.
It is further intended as a protection for both Master and Servant. The Master
will be able to detect at once whether his boiler or boilers have been subjected to over-
pressure. It will also protect the Servant when he has been accused of weighting his
valves or overpressing his boiler or boilers.
"Referring to drawings accompanying provisional Specification I wish to state
that,
No. 1. Figure on the sheet shows the formation of small finger with spring attached,
which will be of delicate construction, and which also will work loose from its centre,
and as it will appear on pressure gauge.
No. 2. Large finger which will be fastened at its centre and small one also showing
the action of largo finger on small one.
No. 3. Small cog wheel one sixteenth in thickness in which the spring will fit, will
be fastened on centre of dial.
No. 4. Small finger with spring attached also showing formation in centre where
large finger will catch in order to push it round the dial.
No. 5. Showing formation of large finger.
No. Small finger placed on side showing formation by which it will travel round
the wheel.
No. 7. Small spring one sixteenth wide.
"Now the manner in which the invention will perform its duty is as follows."
When steam is raised in a boiler the large finger commences to travel round the dial.
The small one which is placed before is pushed round by the large one.
It does not
matter at what pressure a boiler is worked, as soon as steam decreases and pressure is
relieved the large finger returns leaving the small one which remains stationary,
prevented from returning itself by the action of the spring, and from moving either
one way or the other and thus at once indicating the exact amount of pressure to which
the boiler has been subjected. Upon steam being again raised and if it be necessary
that there should be more pressure the small finger will again be pushed forward and
will still indicate the amount of pressure carried by the boiler.
"To prevent the pressure gauge being tampered with a lock and key will be used.
and the key hole stamped with sealing wax with the Managers monogram on it.
With regard to drawings I desire that those "left with the provisional Specification
to form my complete Specification.

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
1. The small finger which will be of delicate construction and which will also be of
the same length and make as shown on drawings.
2. The small spring which will be of the same length and width as shown on
drawings and which also will be attached to small finger above mentioned as shown on
drawings.
3. The small cog wheel which will be of the same diameter as shown on drawings.