IMPROVEMENTS IN CHIMNEY TOPS
Year: 1884

page_text: I, JOHN CHAMPNEY BOTHAMS, of Church Field Road, Fisherton Anger, in the
County of Wilts, Civil Engineer do hereby declare the nature of said invention
for "IMPROVEMENTS IN CHIMNEY TOPS to be as follows:-
According to my invention in lieu of as heretofore has been usual providing each
flue or chimney with a separate and independent top or terminal I cause the
products of combustion from two or more (it may be all) of the flues or chimneys
to enter a chimney top or terminal common to both (or more) such flues or
chimneys, and so constructed as to shield the tops of the flues or chimneys from
the direct action of the wind; Thus by my invention there is provided an
enlarged space into which the flues or chimneys discharge; In the walls of the
said common top or terminal or in some of them are louvres or openings slanting
upward towards. its interior, so as to divert external currents of air which in
passing through the openings acquire an upward direction within the said top or
terminal.
To enable the nature of my invention to be clearly understood I.append a sheet
of drawings wherein arrangements of chimney tops or terminals according to my
invention are illustrated by way of examples.
Referring to these drawings it will be seen that such a chimney top or terminal
may be constructed rather larger than is needful to enclose the ends of two or
more flues; with its sides and ends upright or nearly so; with cross pieces or
frames a. a. a..a (Figs 1, 2, 3, 4 and 5) passing above and between the flues; and
with louvres or openings b. b. b. (Figs 1, 2, 4, 5, 6 and 7) of any suitable form in
the sides or ends or in both. Also the chimney top or terininal may be made in one
or more pieces and be united by dovetail and groove as at c. c (Figs 4 and 5) or
by other convenient method of fastening; or the side pieces may be so united to
the end pieces and to the cross pieces or frames, and any of these cross pieces may
be omitted. There may or may not be at the upper end a complete or partial
cover & (Figs 1, 2 and 7) in one or more pieces.
My improved chimney top or terminal may be made of metal or of stoneware
terra-cotta or other suitable material or a combination of them and parts may be
made interchangeable.
As represented in Fig.7 it is built with louvre bricks such as described in the
provisional specification of my application for letters patent, bearing even date
herewith No 5211.
Dated this 20th day of March 1884

page_text: I, JOHN CHAMPNEY BOTHAMS, of Church Field Road, Fisherton Anger, in the
County of Wilts, Civil Engineer, do hereby declare the nature of my invention
for "IMPROVEMENTS IN CHIMNEY TOPS and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:
According to my invention in lieu of (as heretofore has been usual) providing
each flue or chimney with a separate and independent top or terminal, I provide a
chimney top or terminal common to two or more such flues or chimnies, and so
constructed as to shield the tops, of the flues or chimnies from the direct action of
the wind, to aid in promoting an efficient up draught and to provide an enlarged
discharge space for each flue or chimney. In the walls of the said common top or
terminal or in some of them are louvres or openings slanting upwards towards its
interior so as to divert external currents of air which in passing through the
openings acquire an upward direction within the said top or terminal.
Referring to the accompanying sheet of illustrative drawings Fig 1 is an
elevation of a chimney top according to my invention such as may be constructed
of metal.
Fig. 2 is a cross section of the same.
Fig. 3, a horizontal section; Figs. 4 and 5 shew internal cross pieces frames or
divisions.
Fig. 6 shews in horizontal section part of a chimney top such as may be
constructed of terra cotta or the like, Fig 7 is a vertical. section of the same.
Fig 8 shews in vertical section a chimney top built up of bricks or blocks such as
described in the specification of my application for Letters Patent bearing even-
date.herewith and numbered 5211..
It will be seen that a chimney top or terminal according to my present invention
may be constructed rather larger than is needful to enclose the ends of two or more
flues.
a, a, a, a arc-cross pieces frames or divisions passing above and between the
flues, and b. b. b. are louvres or openings which may be of any suitable form in the
sides or ends or in both.
The chimney top or terminal as represented in Figs 1 to 5 inclusive is made in
parts, of metal such as iron and for the sake of illustration is shewn as being
united partly by dovetails and grooves and partly by screws or bolts; but one of
these methods alone, or other known methods of fastening, may evidently be
adopted.
The sides may be in pieces and may be made separate from and be united to the
end pieces and to the cross pieces or frames and these cross pieces may each
establish either a partial or a complete separation between the flues to nearly the
top of the chimney top or terminal or the cross pieces or some of them may be
omitted: There may or may not be at the upper end a complete or partial cover d
Figs 1, 2 and 8, in one or more pieces.
The improved chimney top or terminal besides being made of metal or of terra
cotta may be constructed of stone-ware or of other suitable material or of a
combination of materials, and parts may be made interchangeable.
As represented in Fig 8 it is as already stated, built with louvre bricks such as
described in the specification of my application for Letters Patent N° 5211
A.D. 1884. It will be noted that by my invention I am enabled to dispense with
unsightly varieties of chimney tops such as are so frequently to be seen where
separate chimney top is used for each flue.
4

page_text: · 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 :-
The construction of chimney tops substantially as hereinabove described with
reference to the drawings.