IMPROVEMENTS IN APPARATUS FOR VENTILATING BUILDINGS AND OTHER STRUCTURES."
Year: 1878

page_text: LETTERS PATENT to William Fisher, of Manchester, in the County of Lancaster,
for the Invention of "IMPROVEMENTS IN APPARATUS FOR VENTILATING
BUILDINGS AND OTHER STRUCTURES."
PROVISIONAL SPECIFICATION left by the said William Fisher at the Office
of the Commissioners of Patents on the 12th October 1878.
WILLIAM FISHER, of Manchester, in the County of Lancaster.
"IMPROVEMENTS
IN APPARATUS FOR VENTILATING BUILDINGS AND OTHER STRUCTURES.”
This Invention relates to that system of ventilating buildings wherein a " sun-
light" or other similar group of burners placed near the ceiling is employed for
beating air in a cylinder or pipe fixed within a vertical ventilating shaft to create
an upward current for withdrawing the vitiated air from the room or building.
Hitherto it has been customary in such arrangement to leave the top of the inner
or hot-air tube open, so that the hot air and direct products of combustion did not
mingle with the vitiated air from the room until it arrived at the upper end of the
hot-air tube which was placed some distance above the roof of the building.
My Invention consists principally in closing the top of the inner or hot-air tube
and in perforating the sides all round above the ceiling so that the hot air and direct
products of combustion of the gas are compelled to pass out at once into the outer
or ventilating shaft and mingle with the vitiated air ascending from the room,
whereby the current of the same is considerably accelerated and the ventilation of
the room, building, or other structure is proportionately improved.
In this case also all downward currents are prevented, and it is not necessary to
carry the ventilating shaft to so great a height as usual above the roof.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said William Fisher in the Great Seal Patent Office on the 12th April 1879.
WILLIAM FISHER, of Manchester, in the County of Lancaster. "IMPROVEMENTS
IN APPARATUS FOR VENTILATING BUILDINGS AND OTHER STRUCTURES."
" sun-
This Invention relates to that system of ventilating buildings wherein a
light" or other similar group of gas burners placed near the ceiling is employed for
heating air in a cylinder or pipe fixed within a vertical ventilating shaft to create
an upward current for withdrawing the vitiated air from the room or building.
Such being the nature and object of my said Invention I will now proceed to
describe in detail the manner in which the same is to be or may be performed or
carried into practical effect, and in order that the same may be clearly understood I
have hereunto annexed a Shect of Drawings illustrative thereof, and have marked
the same with figures and letters of reference corresponding with those in the
following explanation thereof.
Fig. 1 in the annexed Drawing is a vertical section of my improved apparatus;
Fig. 2, an outside elevation; and Fig. 3, a plan view as seen from beneath.
a, a, is the "sunlight" burner; b, b, the gas pipe; c, c, the ceiling; d, d, the
roof; e, e, the outside ventilating shaft; and f. f, the inner or hot-air tube.
Hitherto it has been customary in such arrangements to leave the top of the
inner or hot-air tube f, f, open so that the hot air and direct products of combustion
did not mingle with the vitinted air from the room in the ventilating shaft e, e,
until it arrived at the upper end of the said hot-air tube f, f, which was placed
some distance above the roof d, d, of the building.
My Invention consists principally in closing the top of the inner or hot-air tube
as at g and in perforating the sides all round above the ceiling, as shown at h, h, so
that the hot air and products of combustion of the gas are compelled to pass out at
once into the outer or ventilating shaft, thereby creating an upward current below
the perforations, the effect of which is to compel the vitiated air of the room, or
building, or other structure to ascend and pass out with the products of combustion.
In this caso also downward currents are prevented, and it is not necessary to
carry the ventilating shaft c, e, to so great a height as usual above the roof d, d.
I would here observe that in cases where it is not convenient to carry the
ventilating shaft and hot-air tube directly through the roof in a vertical line as
shown in the Drawing, the same may be caused to diverge horizontally, obliquely,
or otherwise, and may be carried into the open air in any way most convenient and
desirable.
Having now described the nature and object of my said Invention, together with
the manner in which the same is to be or may be performed or carried into practical
effect, I wish it to be understood that I claim as my Invention, the improved
apparatus for ventilating buildings and other structures, constructed substantially
as above described, and illustrated by the annexed Drawings; and more especially I
claim closing the top of the inner or hot-air pipe and perforating the sides thereof
above the ceiling substantially in the manner and for the purposes above more par-
ticularly set forth and described.
In witness whereof, I, the said William Fisher, have hereunto set my hand
and seal, this Tenth day of April, in the year of our Lord One thousand
eight hundred and seventy-nine.