Improvements in the Construction of Metallic Chimneys, Flues, Louvres, Ventilating Shafts, and analogous articles.
Year: 1891

page_text: Date of Application, 19th Feb., 1891
Complete Specification Left. 5th Nov., 1891-Accepted, 12th Dec., 1891
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Metallic Chimneys, Flues,
Louvres, Ventilating Shafts, and analogous articles.
I, THOMAS PAUL LOMAS, of 8 Surrey Lane, Battersea, London S.W. Agent
do hereby declare the nature of my said invention to be as follows:-
The object of my invention is to effect improvements in the manufacture of
metallic chimneys, flues, louvres, ventilating shafts, and other articles of an
analogous construction.
In carrying out my invention, I cut sheet metal, copper, tin, or other metallic
plates, approximately to the required sizes. These pieces are sheared, stamped,
pressed, corrugated, buckled and flanged, so as to fit them to form portions of the
aforesaid articles.
In some cases I corrugate and buckle the whole of the plate except the flanged
edges. The plates are made into the forms of portions of cylinders, or portions
of a frustum of a cone. In other cases the plates are stamped out plain and
rectangular, with flanges all round, and sometimes they are tapered, or made
narrower at one end, and, when riveted, grooved, or soldered together they form
polygonic structures for various purposes.
When forming louvre ventilating shafts, the plates are tapered and corrugated;
flanges being formed on two sides only. These are riveted, soldered or grooved
together in any suitable manner, to form rings and are built up in rings, to the
required height, leaving annular openings for the air to enter the shaft.
Dated 10th Febru 1891
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in the Construction of Metallic Chimneys, Flues,
Louvres, Ventilating Shafts, and analogous articles.
I, THOMAS PAUL LOMAS, of 8 Surrey Lanc, Battersea, London, S.W., Agent,
do hereby declare the nature of my said invention and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement :-
The object of my invention is to effect improvements in the manufacture of
metallic chimneys, flues, louvres, ventilating shafts, and other articles of an
analogous construction.
In carrying out my invention, I cut sheet metal, copper, tin or other metallic
plates, approximately to the required sizes. These pieces are sheared, stamped,
pressed, corrugatel, buckled, and flanged, so as to fit them to form portions of the
aforesaid articles.
In some cases I corrugate and buckle the whole of the plate except the flanged
edges. The plates are made into the forms of portions of cylinders, or portions of
a frustum of a cone. In other cases the plates are stamped out plain and
rectangular, with flanges all round the corrugated portion; and sometimes they
are tapered, or made narrower at one end; and, when riveted, grooved, or soldered
together, they form polygonic structures for various purposes.
When forming louvre ventilating shafts, the plates are tapered and corrugated ;
flanges being formed on two sides only. These are riveted, soldered, or grooved

page_text: together, in any suitable manner, to form rings, and such rings are built up to the
required height, leaving annular openings for the air to enter the shaft.
And in order that my said invention may be particularly described and
ascertained, reference is hereby made to the accompanying drawings, in which the
application of my invention to the formation of a chimney cowl is shown.
Fig. 1 is an elevation of the cowl. Fig. 2 is a plan view with the corrugations
omitted for the sake of clearness. Fig. 3 is an elevation of one of the corrugated
plates, and Fig. 4 is a section of the same.
bare the
aa are the tapered corrugated plates forming the walls of the cowl.
flanges which are bolted or riveted together, so as to unite the plates. The forms
of the corrugations, (as preferred) are shown at c c. dd are openings for the
entry of air to the inside of the cowl, whereby an upward current is induced, and
the ventilation of the flue to which the cowl is attached, is secured.
The above described tapered plates are also suitable for the formation of pails
and buckets. Parallel-sided plates are suitable for cylindrical, (approximately)
barrels and other vessels, drain pipes and air shafts. For barrels of ordinary
form the plates are tapered from the middle to the ends. For the erection of
permanent or temporary buildings roofs and analogous structures the plates may
be simply buckled and corrugated.
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 manufacture and use of corrugated, buckled, tapered, rectangular,
curved and flanged plates, substantially as hereinbefore described.
2. The application and use of plates, manufactured as aforesaid, in the
construction of metallic chimneys, flues, louvres, ventilating shafts, and analogous
articles (excepting stoves) substantially as hereinbefore described and illustrated
by the drawings.
Dated 4th November 1891.
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent.