Improvements in the Construction of Joints for Sectional or Tubulous Water-tube Steam Boilers, Steam Pipes, Hot Water Pipes, and Analogous Uses.
Year: 1887

page_text: Date of Application, 10th Mar., 1887
Complete Left, 5th Jan., 1888
Complete Accepted, 10th Feb., 1888
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Joints for Sectional or Tubulous
Water-tube Steam Boilers, Steam Pipes, Hot Water Pipes, and
Analogous Uses.
We, SARGEANT HICKMAN SMITHя of 44 Chapman Road, Small Heath, Birmingham
in the County of Warwick Pattern Maker and HOWARD LANE, of Palmerston
Buildings Old Broad Street in the City of London, Engineer, do hereby declare the
nature of our said invention to be as follows:-
Our invention relates to what is known as "metal joints" viz.:-joints which aro
made by contact of clean metal surfaces, thereby securing freedom from leakage under
internal pressure, without the use of packing; and the object of our invention is to
construct such joints so that the heavy cost and trouble of machining may be
avoided.
In carrying out our invention we cast the ends of the, tubes, or terminal boxes, or
chambers, with "chills," inserted in the moulds. These chills are accurately machined,
and the metal, when poured over them, receives an exact impression of the surface;
the result being that the joints are steam and water-tight, when bolted together or
otherwise united, without entailing further expense in preparing the same.
GEO. DOWNING,
Agent for Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in the Construction of Joints for Sectional or Tubulous
Water-tube Steam Boilers, Steam Pipes, Hot Water Pipes, and
Analogous Uses.
We, SARGEANT HICKMAN SMITH, of 44. Chapman Road, Small Heath, Birmingham,
in the County of Warwick, Pattern Maker, and HOWARD LANE, of Palmerston
Buildings, Old Broad Street, in the City of London, Engineer, do hereby declare
the nature of our said invention and in what manner the samo is to be performed,
to be particularly described and ascertained in and by the following statement :-
Our invention relates to what is known as "metal joints," viz.:—joints which are
made by contact of clean metal surfaces, thereby securing freedom from leakage
under internal pressure, without the use of packing; and the object of our invention
is to construct such joints so that the heavy cost and trouble of machining may bo
avoided.
In carrying out our invention we cast the ends of the tubes, or terminal boxes, or
chambers, with chills" inserted in the moulds. These chills are accurately machined,
and the metal, when poured over them, receives an exact impression of the surface;
the result being that the joints are steam and water-tight, when bolted together or
otherwise united, without entailing further expense in preparing the same.
And in order that our said invention may be particularly described and ascertained,
reference is hereby made to the accompanying drawing, in which the application of
our invention to two of the tubes of a "Root" boiler is shewn in section, and from
which its application to steam pipes, hot water pipes, and other analogous uses, will be
readily understood.
a a are the ends of two boiler tubes or pipes, screwed into the end castings bb.
c is another casting forming a connecting piece or bend, held in position by bolts ff.
The castings and care formed with chilled surfaces at d d. Intermediate rings e e,
formed of steel, bronze, gun metal, lead, or other suitable material, with proper
recesses to receive the chilled surfaces, are fitted as shewn.
The chilled surfaces may be formed in various ways, so as to secure a fluid-tight
joint, with or without rings e e.
Having now particularly described and ascertained the nature of our said Inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
:-
In tho construction of joints for sectional or tubulous water-tube steam boilers,
steam pipes, hot water pipes, and analogous purposes, the application and use of chilled
facings, substantially as herein before described.
Dated 5th January 1888.
GEO. DOWNING,
Agent for Applicants.