Improved Chimney Top or Ventilator.
Year: 1886

page_text: Date of Application, 10th May, 1886.
Complete Left, 20th Jan., 1887.
Complete Accepted, 25th Feb., 1887.
Improved Chimney Top or Ventilator.
GEORGE SHARP Senr. 3 Silchester Road, St. Leonards-on-Sea Monumental Mason
do hereby declare the nature of this invention to be as follows:-
The Oscillating Chimney Top is to be made plain or Ornamental to any design the
architect may require, The framework, Standard, Spindle, Hanging Irons Finials &c.
to be made of wrought Iron as Pr. detail drawing, The bearings and washer to be of
brass, The surface of Louvres to be of Zinc or Iron galvanized or coated with
waterproof paint. The shaft to be of the same material to any height that may be
required, wire bands to be worked in as shown on section, The striking Tires to be
of India rubber or other automatic dead sounding material The Chimney top to
consist of One, Two, or more Louvres as the case may require, The Spindle screw
thread to be cut as shown to admit of the conical Louvres being set closer or more
open by moving the regulating nut up or down to meet the exigencies of the case.
The advantages of this invention is to shut off the down draft in rough weather and
accelerate the up current in general, The Louvres closing on the windward from any
point of the compass and the upper cone being tilted in a gale admits the wind as
shown by the arrows (on drawing No. 2) dispersing the smoke thus forming a vacuum
inducive to the upward action of the column of heated air in the flue.
The cowels in general use are not sufficiently buoyant they frequently whirl right
round in rough weather taking in the wind at each revolution
Hence the puffy
smoky fireplace in rough weather.
The Oscillating bearing is the leading feature in this invention and the number of
Louvres and dimensions are ruled by the action of the wind in different situations and
localities regulated by the judgment of the operator.

page_text: I GEORGE SHARP Senr. of No. 3 Silchester Road Saint Leonards-on Sea in the
County of Sussex Monumental Mason 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:-
An Improved Chimney Top or Ventilator for shutting off down draught and
accelerating up current of vitiated air from the interior of Buildings of any description
a Ventilating Cowl with Louvre or Louvres to oscillate thereby to close on the
windward from any point of the compass and open on the leeward for escape of
vitiated air which is to be made plain or ornamental to any dimensions or design the
user may require The frame work is to be of wrought Iron The hollow-ware of
galvanized sheet iron or Zinc which part is marked J on the drawings The tire H is
to be made of indiarubber or other deadsounding material for the purpose of preventing
the louvres clashing in windy weather. The flanges I to be of wrought iron or metal
tubing, The bearings C to be in brass and the collars E brass The sheathing G out
of metal tubing, The louvres One, Two, or more in number as the case may require
to be hung oscillating with hanging irons D on bearings C with regulating nut B
under and back nut over to keep the louvres in position, The stanchion A to be of
wrought iron screwed as shown on drawing so that the louvres may be opened or
closed by moving the regulating nut up or down and the sheathing must in each case
be fitted between the regulating nut and back nut for the purpose of preventing the
regulating nut from working downwards, The hollow ware to be fixed to the stays
and hanging irons with iron screw bolts or copper rivets.
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 to be my
invention is
The whole of the construction shown and described by the drawings and
specification except the hollow ware that is not covered by the dead-sounding tires and
flanges to same. The novelty being the oscillating louvres on moveable bearings and
dead sounding tires to same.
GEO. SHARP, SENR.