Improvements in Apparatus for Automatically Extinguishing Fires Caused by Accident.
Year: 1888

page_text: Date of Application, 4th Sept., 1888.
Complete Specification Left, 23rd May, 1889-Accepted, 29th June, 1894
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Automatically Extinguishing Fires
Caused by Accident.
I AARON BRADSHAW Griffin Works Willows Lane Accrington Lancashire
Engineer and Brassfounder do hereby declare the nature of this invention to be as
follows:-
By these improvements steam used for heating purposes may be employed to
extinguish fire if it by accident occurs in a room or building. But if the pipes used
for heating such room or building be not convenient for the purpose aforesaid then a
separate service of steam pipes may be employed for the said purpose and by
preferance charged with steam of high pressure.
The construction and mode of operating the aforesaid apparatus is as follows ciz.
Into a hole prepared in the said steam pipe I screw a suitably arranged valve body tho
valve body has a valve seating on one end and a round paralell cylinder at the other end
the centre line of cylinder and valve seating being at right angles to the hole in valve
body which communicates with the said steam pipe. On the said valve seating I fit
a valve and make the said valve steam tight to the outer face of the said valve I
form a central pivot or spindle and extend the said pivot so that it may be held in
position by a bearing formed outside the said valve body and at a sufficient distance
from the outer face of the said seating to allow a free discharge of steam from the
orifice of the said valve wheu it is open.
The aforesaid pivot or spindle I make of less diameter than the hole in valve seating.
so that the aforesaid pivot interfere as little as possible with the flow of steam through
orifice of valve when valve is open.
The mode of opening the said valve is as follows viz. on the back or inside
of the said valve and a short distance from it form a piston the said piston
being made a free fit into the aforesaid cylinder the area of this piston.is greater than
the area of the orifice in valve seating a suitable proportion of the areas being four
to one.
Through the said piston I drill a small hole such that a common pin shall fill it and
at the outer end of the said cylinder I fit a cap having a valve in centre the seating
of valve being inside cylinder when the cap is screwed upon end of cylinder the said
valve I keep up to its seating by means of a light coil spring when the said valve is
in its place and held against its seating and the said cap is screwed to end of cylinder
the said cylinder is hermetically closed on its outer end so that when steam is admitted
into the said valve body it by means of the pin hole through the piston instantly
establishes an equilibrium of pressure above and below the piston and prosses the
aforesaid valve against its seating but if the small valve in centre of cap aforesaid is
opened then the pressure formed above the piston aforesaid instantly escapes and
causes the piston to be blown towards the outer end of cylinder and thus opens the
valve which admits steam into the room or building and any fire that may exist in
such room or building by this means is extinguished.
The mode of opening the small valve in cap on end of cylinder aforesaid is as
follows I fix an expansive vessel as described and set forth in a patent grautel to me
Number 11632 and dated 27th August 1887 entitled "Improvements in expansive
vessels of Steam traps" at a suitable distance from outer end of the aforesaid valvo
and I cause the said expansive vessel to rest upon the end of an adjusting serew the
said expansive vessel I charge with volatile spirits which boil at a low temperature
so that on the room or building in which the said apparatus is fixed becoming unduly
heated the said spirits expand and press out the ends of expansive vessel causing it
to become longer and thus opens the aforesaid small valve and by means of the
piston acting as aforesaid causes the main valve to open.

page_text: By means of the adjusting screw aforesaid the distance betwixt the end of
expansive vessel and the outer end of small valve in cap on end of cylinder may be
regulated and by this means the temperature that shall cause expansive vessel to
open the aforesaid small valve may be determined. The number size and position
of the aforesaid apparatus may be so arranged that accidental fire becomes
impossible.
1000
COMPLETE
SPECIFICATION.
Improvements in Apparatus for Automatically Extinguishing Fires
Caused by Accident.
I, AARON BRADSHAW Griffin Works, Willows Lane Accrington Lancashire Engineer
and Brass Founder 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 :-
.
By these improvements steam used for heating purposes may be employed to
extinguish fire if it by accident occurs in a room or building but if the pipes used
for heating such room or building be not convenient for the purpose then a seperate
service of steam pipes may be employed for the said purpose and by preferance
charged with steam of high pressure. The construction and mode of operating the
aforesaid apparatus is as follows viz.-Into a hole prepared in the said steam pipe I
screw a suitably arranged valve body the valve body has a valve seating on one end
and a round paralell cylinder at the other end the centre line of cylinder and valve
seating being at right angles to the hole in valve body which communicates with the
said steam pipe on the said valve seating I fit a valve and make the said valve
steam tight.
To the outer face of the said valve I form a central pivot or spindle and extend
the said pivot so that it may be held in position by a bearing formed outside the said
valve body and at a sufficient distance from the outer face of the said seating to
allow a free discharge of steam from the orifice of the said valve when it is open.
The aforesaid pivot or spindle I make of less diameter than the hole in valve seating
so that the aforesaid pivot interferes as little as possible with the flow of steam
through orifice of valve when valve is open. The mode of opening the said valve is
as follows-viz.-On the back or inside of the said valve and a short distance from it
I form a piston the said piston being made a free fit into the aforesaid cylinder the
area of this piston is greater than the area of the orifice in valve seating a suitable
proportion of the areas being four to one. Through the said piston I drill a small
hole such that a common pin shall fill it, and at the outer end of the said cylinder I
fit a cap having a valve in the centre the seating of valve being inside cylinder
when the cap is screwed upon end of cylinder. The said valve I keep up to its
seating by means of a light coil spring when the sai: valve is in its place and held
against its seating and the said cap is screwed upon end of cylinder the said cylinder
is hermetically closed on its outer end so that when steam is admitted into the said
valve body it by means of the pin hole through the piston instantly establishes an
equilibrium of pressure above and below the piston and presses the aforesaid discharge
valve against its seating but if the small valve in centre of cap aforesaid is opened
then the pressure formed on outer end of piston aforesaid instantly escapes and
causes the piston to be blown towards the outer end of cylinder and thus opens the
discharge valve and admits steam into the room or building and any fire that may
exist in such room or building is by this means extinguished.
The mode of opening the small valve in cap upon end of cylinder aforesaid is as
follows viz. I fix an expansive vessel as described and set forth in a patent granted
to me No. 11632 and dated 27th August 1887 entitled "Improvements in expansive
vessels of steam traps" at a suitable distance from outer end of the aforesaid small

page_text: AARON BRADSHAW.