IMPROVEMENTS IN THE CONSTRUCTION OF CHIMNEY POTS
Year: 1880

page_text: LETTERS PATENT to Lorentz Albert Groth, Civil Engineer, and Proprietor of
the Scandinavian Patent Office, under the Firm of L. A. Groth & Co., 97,
Finsbury Pavement, London, EC., for an Invention of "IMPROVEMENTS IN THE
CONSTRUCTION OF CHIMNEY POTS." A communication by Pierre Dencausse,
of Pautin, in tho Republic of France.
PROVISIONAL SPECIFICATION left by the said Lorentz Albert Groth at the
Office of the Commissioners of Patents on the 20th July 1880.
LORENTZ ALBERT GROTH, Civil Engineer, and Proprietor of the Scandinavian
Patent Office, under the Firm of L. A. Groth & Co., 97,. Finsbury Pavement,
London, E.C. "IMPROVEMENTS IN THE CONSTRUCTION OF CHIMNEY-POTS." A com-
munication by Pierre Dencausse, of Pautin, in the Republic of France.
This Invention relates to the improved construction of chimney-pots, and
consists, first, of a circular body having its lower part formed as a screw, in order,
whero practicable, to be screwed fast to the chimney top. This body can also be
fixed to the chimney top in any other suitable manner. The upper part of the
body is provided with a recess and narrowed, thus forming a neck, in order to
provoke the required draught in the chimney. The neck is provided with a various
number of square holes systematically arranged, and through which the smoke,
ascending from the chimney, passes to the open air. The top of the neck is also
provided with a recess or rim, having a number of holes, through which the smoke
can also pass.
The Invention consists, secondly, of a cover provided with suspending arms,
which are made wider than and placed opposite the square holes in the body, and
reaching to and resting upon the lower recess of the body. This cap or cover
resting upon the body is to be made firm by means of pins passing through the
suspending arms into the neck of the circular body.
This new construction of chimney pots will annihilate all defects apparent in
other systems for curing smoky chimnies, not only by the complete suppression of
the current air or outward atmospheric pressure, but also counteract the bad effect
caused by the rays of the sun shining strongly upon the face of the chimney; that
is to say, any dificiency of draught from whatever cause is provided against by
means of this system.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Lorentz Albert Groth in the Great Seal Patent Office on the 19th
January 1881.
LORENTZ ALBERT GROTH, Civil Engineer, and Proprietor of the Scandinavian
Patent Office, under the Firm of L. A. Groth & Co., 97, Finsbury Pavement,
London, E.C. "IMPROVEMENTS IN THE CONSTRUCTION OF CHIMNEY POTS." A com-
munication from abroad by Pierre Dencausse, of Pautin, in the Republic of France.
This Invention relates to an improved construction of chimney pot, consisting
(firstly) of a circular body (A)-(see Figures 1 and 3 of the Drawing), having its
lower part (B) formned by preference as a screw for securing it to the chimney,-or-
the said body may be fixed to the chimney top in any other suitable or convenient
manner. The upper part of the body (A) is recessed or narrowed, so as to form a
neck to provoke a draught in the chimney. This neck is provided with a greater
or lesser number of openings C, C1, C2, symetrically arranged, and through which
the smoke ascending from the chimney passes into the open air. The top (O) of
the neck is also provided with a recess or rim having a number of holes 8, 8, 8,
through which the smoke can also pass. The Invention consists, secondly, of n
cover or cap E (Figures 2 & 3) provided with supporting arms or branches
N, N, N, which are placed opposite to and made somewhat wider than the openings
C, C1, C2, in the body A, so as to mask completely those openings, as shewn in
dotted lines in Figure 3:
This cover or cap E is secured to the body A by bolts or pins R, R, passing
through holes D, D, in the arms or branches N, N, Ñ, and into the neck of the
body A. These arms or branches N, N, N, may be extended downwards to the
moulding or bead J and may be adapted to rest thereon.
It will now be readily understood that the smoke issuing by the openings
C, C¹, C, and the holes S, S, S, collects in the space P (Fig. 3) left free under the
cap E for that purpose.
This new construction of chimney pot avoids the defects of other systems for
curing smoky chimneys, not only by the complete suppression of the currents of air
or pressure of the atmosphere causing downdraughts, but also counteracts the bad
effect caused by the rays of the sun shining strongly on the face of the chimney,
that is to say, any deficiency of draught arising therefrom.
The chimney pot may be constructed of any suitable material, and in such forms
and to such dimensions as may be found necessary.
Having now described the nature of the said Invention, and the manner in which
the same is to or may be carried into effect, I would have it understood that what
I claim is,-
The construction and use of chimney pots in which the body A with its openings
C, C1, C2, and the cap or cover E with its arms or branches N, N, N, are combined,
arranged, and applied substantially as hereinbefore described and illustrated in the
Drawing, and for the purpose set forth.
In witness whereof, I, the said Lorentz Albert Groth, have hereunto set my
hand and seal, this Nineteenth day of January, in the year of our Lord
One thousand eight hundred and eighty one.