IMPROVEMENTS IN AND APPERTAINING TO CHIMNEY-POTS OR TERMINALS OF VENTILATING SHAFTS, FLUES, OR OPENINGS
Year: 1879

page_text: LETTERS PATENT to Arthur Rolph Burman, of Leasowe Castle Hotel, Seacombe,
in the County of Chester, for the Invention of "IMPROVEMENTS IN AND
APPERTAINING TO CHIMNEY-POTS OR TERMINALS OF VENTILATING SHAFTS,
FLUES, OR OPENINGS."
Sealed the 10th February 1880, and dated the 13th August 1879.
PROVISIONAL SPECIFICATION left by the said Arthur Rolph Burman at
the Office of the Commissioners of Patents on the 13th August 1879.
ARTHUR ROLPH BURMAN, of Leasowe Castle Hotel, Seacombe, in the County of
Chester. "IMPROVEMENTS IN AND APPERTAINING TO CHIMNEY POTS OR TERMINALS
OF VENTILATING SHAFTS, FLUES, OR OPENINGS."
This Invention is designed for the purpose of preventing the frequent evil of
smoky chimneys. A large number of attempts in this direction have been made,
but all apparently in one direction, namely, to prevent the outside air entering the
chimney pot, except in an upward direction. Now, believing that without a very
strong draught or special mechanical means that is practically impossible, I have
arranged my chimney pot so as not merely to allow this objectionable down draught
at the top, but to cause this very down draught. to assist in the ventilation of the
chimney and the exit of the smoke. A short distance below to the top on opposite
sides of the pot I hang two or more doors forming the walls of the pot; these doors
are linked in couples by means of rods or weighted levers on one side so as not to
interfere with the brush in cleaning, and in such manner that if one door be closed
the other must be open, pointing outward and downward at an angle of thirty to
sixty degrees. These doors are each preferably of much larger area than the top.
They are hung loose on hinges or pivots so as to flap with the wind, and are
cushioned with small studs of indiarubber, or hung with springs, or otherwise, so.
that they shall not hit the sides of their suspension holes in the chimney pot side
with force and consequent noise. The mode of the action is as follows:-The wind,
we will suppose blowing from the north side, closes the doors on that side with its
pressure and thereby opens the southern ones, that portion of the wind that strikes
the internal edge of the chimney pot top is deflected downward and outward
through the open doors, carrying the smoke with it. It will be obvious that what
will ventilate a chimney will also ventilate rooms, houses, et cetera. For a house
ventilator I prefer to place a shade a little above to keep out the rain. I sometimes
slightly bulge out the chimney pot just below the rim so as to give the entering air
a direction towards the doors. These pots can be made of any ordinary material '
used in the manufacture of chimney pots.
+

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Arthur Rolph Burman in the Great Seal Patent Office on the 13th
February 1880.
ARTHUR ROLPH BURMAN, of Leasowe Castle Hotel, Seacombe, in the County of
Chester. "IMPROVEMENTS IN AND APPERTAINING TO CHIMNEY-POTS OR TERMINALS
OF VENTILATING SHAFTS, FLUES, OR OPENINGS."
Fig. 1 is a ventilator specially designed for railway carriage roofs, but which
illustrates equally well a chimney-pot, as if one merely lengthens out the base and.
removes the screws and bottom plate one has a chimney-pot. The right hand portion
of the Drawing represents a section, and the left a vertical elevation, the apparatus
being symmetrical, and all four sides precisely alike, except that one tube with its
contained wire brace crosses just above the other, and not of course in the same
horizontal plane; Fig. 2 is a sectional elevation of a chimney-pot without the
louvre boards.
This Invention is designed for the purpose of preventing the frequent evils of
smoky chimneys and bad ventilation." A large number of attempts at curing
smoky chimneys have been made, all apparently in one direction, namely, to
prevent the outside air entering the chimney-pot, except in an upward direction.
Now, believing that without a very strong draught or special mechanical means
this is practically impossible, I have arranged my chimney-pot so as not merely to
allow this objectionable down draught at the top, but to cause this very down
draught to assist in the ventilation of the chimney and the exit of the smoke.
A short distance below the top, on opposite sides of the pot or ventilator, I hang
two or more doors A forming the walls of the pot or ventilator; these doors are
linked in couples by means of rods B, or, if desirable, by weighted levers. In
ventilators these rods can cross in the centre, as shown, but in chimney-pots they
should be close to the sides of the pot so as not to interfere with the brush in
cleaning, and in such manner that if one door be closed the other must be open,
pointing outward and downward at an angle, when open, of from twenty to thirty
five degrees with the vertical. These doors are each preferably of much larger
area than the top. They are hung loose on hinges, chains, or pivots C, so as to flap
with the wind, and are cushioned with small studs of india-rubber D, or hung with
springs, or otherwise, so that they shall not hit the sides of their suspension holes in
the chimney-pot side with force and consequent noise.
In the Drawing E, E, are louvre boards to keep out the rain (these are required
in ventilators only, not in chimney-pots); F, F, are tubes round the links B to keep
the wet from said links.
The mode of action is as follows:-The wind, we will suppose blowing from the
north side, closes the doors on that side with its pressure and thereby opens the
southern ones, that portion of the wind that strikes the internal edge of the
chimney-pot top is deflected downward and outward through the open doors,
carrying the smoke with it.
It will be obvious that what will ventilate a chimney will also ventilate rooms,
houses, carriages, and the like. In the Drawing of ventilator for railway carriage
the flange G fits on top of the carriage over the ventilating hole filled by the
apparatus. His a perforated cover for hole; I, perforated plate above, provided
with handle J for adjusting amount of ventilation_by_regulating the amount of
coincidence between the two sets of variations; K, K, studs for fastening all
together. For a house ventilator I prefer to place a shade a little above to keep
out the rain, as shown in skeleton in Fig. 2, but louvres will do. I sometimes
slightly curve or bend the chimney-pot just below the rim, as shown, so as to give
the entering air a direction towards the doors. In ventilators only I sometimes

page_text: put a cap on the top to keep out the rain, as shown, but even then I prefer to have
an opening above the doors, especially when shut, for the wind to enter.
These pots or ventilators can be made of any ordinary material used in the
manufacture of chimney-pots.
Having now described my Invention, and the best mode known to me of carrying
it into effect, I wish it to be understood that I do not claim the principle of doors
or side holes in chimney-pots or ventilating terminals, taken broadly, as side holes
have been used before; but that which I believe to be new and desire to protect
under the hereinbefore in part recited Letters Patent is,—
1. The construction of chimney-pots or ventilator terminals with side doors
linked together or arranged in such manner that the wind shutting the doors on
one side shall open those on the other, so as to provide free exit for smoke or wind
at their sides and bottoms, preferably in combination with an opening at the upper
termination or rim of the ventilator above the doors.
2. The chimney-pot or ventilator with open top and hanging doors linked
together, so that when the doors on one side are closed those on the other shall
afford free exit for the smoke or wind.
3. Application in chimney-pots or ventilators with hanging doors of india-rubber
or spring buffers to deaden the shock, substantially as herein described.
4. The general arrangement of ventilator, substantially as herein described and
shown.
In witness whereof, I, the said Arthur Rolph Burman, have hereunto set my
hand and seal, this Eleventh day of February, in the year of our Lord One
thousand eight hundred and eighty.
ARTHUR ROLPH BURMAN. (L.S.)
Witness,
W. P. THOMPSON,
of W. P. Thompson & Co.,
Patent Agents,
6, Lord Street,
Liverpool,
& 323, High Holborn,
London.