Improved Safety Apparatus for Preventing the Explosion of Bath and other Boilers.
Year: 1887

page_text: Date of Application, 1st Feb., 1887
Complete Left, 1st Nov., 1887
Complete Accepted, 2nd Dec., 1887
PROVISIONAL SPECIFICATION.
Improved Safety Apparatus for Preventing the Explosion of Bath
and other Boilers.
We JAMES FOORD of 276 Portobello Road Gas and Hot water Engineer and
WILLIAM WREFORD PADDON of No. 34 St. Charles Square Gentleman both in
North Kensington London do hereby declare the nature of this invention to be as
follows
:-
This invention has for its object the improvement of the appliances used for the
prevention of Explosions of Bath and other Boilers by means of a safety valve being
connected with a pipe attached to the Boiler. We make use of a brass socket with
male or female screw with cap & lining in the form of a union. Between the
surfaces of the socket & lining we place a disc of sheet lead to cover the aperture.
The lead used in each case is adapted to the requirements of each Boiler, allowing a
safe & workable margin between the strength of the Boiler and that of the lead.
A pierced ball is screwed to the lining to provide for the safe outlet of steam or
water in case the valve should open. As it is practicable to use other metals besides lead
for the disc of the valve we do not confine ourselves to the use of lead only.
Dated this First day of February 1887

page_text: Improved Safety Apparatus for Preventing the Explosion of Bath
and other Boilers.
We JAMES FOORD of No. 276 Portobello Road, Gas and Hot Water Engineer and
WILLIAM WREFORD PADDON of No. 34 St. Charles Square Gentleman botli in North
Kensington London, 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 :-
Our invention is devised with the object of preventing the possibility of the explo-
sion of bath and other domestic boilers, such as frequently occurs from the checking
of the supply of water thereto, by the freezing of the water in the pipes, during the
prevalence of extremely cold weather, or from other causes.
In order that our invention may be the better understood we have appended the
accompanying Sheet of drawings, in which Figure 1 is an elevational view of the
device according to our invention, and Figure 2 is a sectional elevational view of
the cap and socket separated from each other, and Figure 3 is a sectional view of a
hollow perforated knob.
In accordance with our invention, we provide a socket A of brass or other suitable
metal, having at its lower extremity a screw B for attachment to a pipe connected
Within the upper or enlarged part of the socket A-
with a bath or other boiler.
which also has a screw thread cut therein is screwed a cap piece C.-and between
the lower extremity a of said cap C and the seat b of the socket A is placed a diaphragm
or disc D of sheet lead or other suitable metal, of such thickness as will allow of a
workable margin between the ascertained tensile strength of the metal dise D afore-
said, and the material of which the boiler is composed.
In order to divert the course of the steam in its escape from the boiler through the
rupture of the metal diaphragm or disc D, we screw or otherwise attach to the cap-
piece Ca hollow knob E having a hole G perforated therein in any convenient position
by means of which the steam or water may be conducted in any direction, and thereby
avoid the risk of injury to any one who may, at the time of the bursting or fracture
of the aforesaid diaphragm or dise be in its vicinity.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what we
claim is :-
Firstly: The improved safety apparatus for preventing the explosion of bath and
other boilers-substantially as herein described and shown in the accompanying
drawings.
Secondly: In a device as herein described, the use of a diaphragm or disc of meta
of specifically lower tensile strength than the material of which the boiler is composed
substantially as and for the purpose herein set forth.
JAMES
STEVENSON,
Gray's Inn Chambers,
20, High Holborn, London, W.C.,
Agent for Applicants.
Dated this 1st day of November 1887.
JAMES STEVENSON,
Gray's Inn Chambers,
20, High Holborn, London, W.C.,
Agent for Applicants.