SAFETY APPARATUS FOR USE IN CONNECTION WITH BLAST AND OTHER PIPES LIABLE TO EXPLOSION FROM INFLOW OF GAS
Year: 1884

page_text: I ROBERT STOREY of Darlington in the County of Durham, Foreman Machinist
do hereby declare the nature of said invention for SAFETY APPARATUS FOR USE
IN CONNECTION WITH BLAST AND OTHER PIPES LIABLE TO EXPLOSION FROM INFLOW
OF GAS to be as follows:-
I will describe my Invention as applied to the blast pipe of a smith's hearth.
In the head of the blast pipe at the rear end of the nozzlo tho pipe is formned or
provided with a long cylindrical chamber which is open at the top and has an
opening in front communicating with the nozzle. Into this chainber I place a long
hollow cylindrical plug closed at the top and open at the bottom and formed on
one side with an elongated opening extending nearly from top to bottom thereof
which opening can be placed opposite the rear end of the nozzle so as to permit tho
blast to pass therethrough when the hearth is in use or can be turned round so
as to close the rear end of the nozzle when the hearth is out of use and thereby
prevent the inflow of gas into the blast pipo.
This cylindrical hollow plug is formed an easy fit to its chamber and the surfaces
in contact are lubricated with black load and grease or with other suitable
lubricant.
If at any time when the hearth is temporarily out of use the plug is left open
after the blast is stopped, the gas from the fire will then enter the nozzle and
accumulate in the blast pipo and fluc. The consequence is that on re-starting the
blast an explosive mixture is formed by the admixture of air with the gas and
frequently a serious explosion occurs by which considerable damage would be caused
if the apparatus were unprotected by my invention; with my improved apparatus
serious consequences are prevented as such explosion will find vent through lifting
the hollow cylindrical plug so that a part of the elongated opening in the side
thereof shall rise above the top of the cylindrical chainber and unless the explosion
has been so violent as to blow the hollow cylindrical plug completely away it will
after the force of the explosion is expended and the gas liberated fall again into
ita position in the chamber.
I would here remark that the cylindrical chamber and plug may be placed in
other position than that above described and may be variously modified to suit the
purpose and position to which it is applied.
A
1

page_text: I ROBERT STOREY of 17 William Street, Whessoe Lane, Darlington in tho
County of Durham, Foreman Machinist, do hereby declare the nature of my
Invention for SAFETY APPARATUS FOR USE IN CONNECTION WITH BLAST AND
OTHER PIPES LIABLE TO EXPLOSION FROM INFLOW OF GAS, and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
I will describe my Invention, as applied to the blast pipe of a smith's hearth.
In the head of the blast pipe at the rear end of the nozzle the pipe is formed or
provided with a long cylindrical chamber which is open at the top and has an
opening in front communicating with the nozzle. Into this chamber I place a long
hollow cylindrical plug closed at the top and open at the bottom and formed on
one side with an elongated opening extending nearly from top to bottom thereof
which opening can be placed opposite the rear end of the nozzle so as to permit
the blast to pass therethrough when the hearth is in use or can be turned round so
as to close the rear end of the nozzle when the hearth is out of use and thereby
prevent the inflow of gas into the blast pipe:
This cylindrical hollow plug is formed an easy fit to its chamber and the surfaces
in contact are lubricated with black lead and grease or with other suitable
lubricant.
If at any time when the hearth is temporarily out of use; the plug is left open
after the blast is stopped, the gas from the fire will then enter the nozzle and
accumulate in the blast pipe and flue. The consequence is that on re-starting the
blast an explosive mixture is formed by the admixture of air with the gas and
frequently a serious explosion occurs by which considerable damage would be caused
if the apparatus were unprotected by my invention; with my improved apparatus
serious consequences are prevented as such explosion will find vent through lifting
the hollow cylindrical plug so that a part of the elongated opening in the side
thereof shall rise above the top of the cylindrical chamber and unless the explosion
has been so violent as to blow the hollow cylindrical plug completely away it will
after the force of the explosion is expended and the gas liberated fall again into
its position in the chamber.
And in order that my said Invention may be more clearly understood and readily
carried into effect I will proceed aided by the accompanying drawings more fully
to describe the same.
DESCRIPTION OF THE
DARWINER
VA
Figure 1. is an elevation, Figure 2 is a vertical section and Figure 3 is an
elevation partly in section showing my invention applied to the blast pipe of a
smith's hearth and Figure 4 is a section and Figure 5 is an elevation of the plug
or valve separately.
is the blast pipe which is provided with an inlet at a² or a³ and with a
nozzlo a³ as is well understood. In the head of the blast pipe at the rear
end of the nozzle or outlet I form or provide the pipe with a long cylindrical
chamber at which is open at the top and has an opening in front communicating
with the nozzle. Into this chamber a I place a long hollow cylindrical plug b
closed at the top and open at the bottom and formed on one side with an elongated
opening b¹ extending nearly from top to bottom thereof, which opening b¹ can be
placed opposite the rear end of the nozzle so as to permit the blast to pass

page_text: therethrough when the hearth is in uso or can bo turned round so as to close the
rear end of the nozzle when the hearth is out of use and thereby provent the inflow
of gas into the blast pipe a.
This cylindrical hollow plug is formed an easy fit to its chamber a' and the
surfaces in contact are lubricated with black lead and grease or with other suitable
lubricant.
If at any time when the hearth is temporarily out of use the plug is left open
after the blast
stopped, the gas from the fire will then onter the nozzle and
accumulate in the blast pipe a and flue. The consequence is that on restarting the
blast an explosive mixturo is formed by the admixture of air with the gas and
frequently a serious explosion occurs by which considerable damage would bo
caused if the apparatus were unprotected by my invention; with my improved
apparatus serious consequences are prevented as such explosion will find vent
through lifting the hollow cylindrical plug b so that a part of the elongated
opening b¹ in the side thereof shall rise above the top of the cylindrical chamber a¹
as shown at figures 1 and 2 and unless the explosion has been so violent as to blow
the hollow cylindrical plug b completely away it will after the force of the explosion
is expended and the gas liberated fall again into its normal position in the
chamber a as shown at Figure 3. a is a guide fixed to the top of chamber a' to
serve as a guide to the stem b² of the plug b and at the same time to limit the
notion of said plug b under ordinary circumstances.
I would here remark that the cylindrical plug b may be placed in other position
than that herein shown and described and may be variously modified to suit tho
purpose and position to which it is applied and it is applicable to the oil pipes of
coking ovens, to forge fires, cupola furnaces and to other pipes liable to explosion
from inflow of gas.
Having thus 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 fitting
blast and other pipes, liable to explosion from inflow of gas, with a chamber a at
rear of and communicating with the nozzle and provided with a hollow cylindrical
plug b constructed and working in mannor substantially as hercin shown and
described.