An Improved Rotary Flue Top.
Year: 1894

page_text: Date of Application, 15th June, 1894-Accepted, 21st July, 1894
COMPLETE SPECIFICATION.
An Improved Rotary Flue Top.
I, THOMAS HENRY WILLSON, of Old Gravel Lane, St. George in the East, in
the County of London, Builder, 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 :—
This invention relates to an improved rotary flue top applicable for extracting
smoke from Hues or vitiated air from ventilating shafts and for preventing down
draught in such flues and shafts, the top being so applied in the improved manner
hereinafter described as to permit of its being raised from its normal position by a
sweeping brush clear of the flue so as to permit of the brush cleaning the whole
length of the flue.
On the accompanying drawings
Fig. 1, represents the improved flue top in sectional elevation on the line 1,-1,
Fig. 2.
Fig. 2, represents a sectional plan on the line 2,-2, Fig. 1 ; and,—
Fig. 3, represents a partial elevation partly in section on the line 1,-1, Fig. 2,
representing a different position of the parts to that represented in Fig. 1.
Like reference letters and numerals indicate like parts wherever they occur on
the drawings.
a, represents a tubular shaft carrying the parts of the improved flue top and
adapted for insertion into or connection with the top of the flue or ventilating shaft.
To it are secured guide rods a¹, of a length determined by the required lift of the
rotary head b.
The head b, may be of the cylindrical conical form represented, formed or
provided with vanes b¹, or it may be otherwise formed and adapted to catch the
wind from whatever quarter it may blow and to be rotated thereby so as to induce
a suction and up-draught within the shaft a. The head b, is formed or fitted with
a vertical axis &, which is secured at its top and to its sides by a cross-bar b³, or
otherwise in any suitable manner, and is of a tubular formation at its bottom part,
as at ', and also at its top part as at b³.
The part 6, is adapted to rest on a pivot-pin c, by which the head b, is supported
and about which it is adapted to rotate, and which is itself supported by a cross
frame c', which is formed with holes ³, Fig. 2, and adapted to engage with the
guide rods a', by which its vertical movements are guided, the frame c', normally
resting on the top edge of the shaft a, vide Fig. 1. Below and secured to the
frame c', is a conical deflector c³, serving to prevent any down-draught in the tube
or shaft a.
The part 6, of the axis &, of the head b, is adapted to engage with a depending
pin d, which is located by nuts d', and carried by arms d', secured to the shaft a, as
at d', or in any other suitable manner.
The under nut d', or a shoulder on the pin d, serves to determine the lift of the
head to prevent the frame c¹, carrying the latter from being thrust off the
guide rods a¹.
Fig. 1, represents the normal position of the parts. Upon the flue being swept,
the sweeping brush comes against the underside of the deflector c, raising it,
together with the head b, it supports, to the position indicated in Fig. 2, the frame c¹,
and the head b, being guided by the rods a', and pin d; so permitting of the
sweeping brush being projected entirely through the flue and shaft a.
the sweeping brush being lowered, the parte all gravitate to their normal position
represented in Fig. 1.
Upon

page_text: In a modification of the foregoing, the head b, may be guided in its vertical
movements by short tubes et, projecting from the arms of the frame c', and fitting
snugly around the guide pins a', and its lift may be determined by nuts a³, or the
like screwed or secured to the top ends of the pins a', both as indicated in dotted
lines in Fig. 1. In such arrangement, the parts d, d¹, d, and d³, may be dispensed
with, and the part 6º, made solid.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a flue top; the combination of the shaft a, formed with guide rods a¹; the
frame c', adapted with a supporting pin c, and a deflector c³, and to be guided by
the rods a'; a guide pin d, supported in a fixed relation to the shaft a; and a
rotary head b, adapted to be supported by the pin c, and guided and determined in
its lift by the pin d; as set forth.
2. In a flue top; the combination of the shaft a, formed with guide rods a¹, and
arresting details a²; the frame c', adapted with a supporting pin c, a deflector c,
and tubular guides c, co-acting with the guide rods a¹; and a rotary head b,
adapted to be supported by the pin c, and determined in its lift by the rods a¹; as
set forth.
Dated this 15th day of June 1894.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C., Agents for the Applicant.