IMPROVEMENTS IN APPARATUS FOR OVER- COMING THE BACK LASH EXPERIENCED IN MACHINES USED FOR THE PURPOSE OF DRYING, PARTS OF WHICH ARE ALSO APPLICABLE TO OTHER MACHINES WHERE TUBES ARE EMPLOYED FOR THE CONDUCTION OF COLD OR HEATED AIR."
Year: 1877

page_text: LETTERS PATENT to Henry Wilson Kelly, Mechanical Engineer, and John
George M Entagart, Commission Agent, both of Dublin, in the County of
Dublin, Ireland, for the Invention of "IMPROVEMENTS IN APPARATUS FOR OVER-
COMING THE BACK LASH EXPERIENCED IN MACHINES USED FOR THE PURPOSE
OF DRYING, PARTS OF WHICH ARE ALSO APPLICABLE TO OTHER MACHINES WHERE
TUBES ARE EMPLOYED FOR THE CONDUCTION OF COLD OR HEATED AIR."
PROVISIONAL SPECIFICATION left by the said Henry Wilson Kelly and
John George M Entagart at the Office of the Commissioners of Patents on the
13th August 1877.
HENRY WILSON KELLY, Mechanical Engineer, and JOHN GEORGE M°ENTAGART,
Commission Agent, both of Dublin, in the County of Dublin, Ireland. "IMPROVE-
MENTS IN APPARATUS FOR OVERCOMING THE BACK LASH EXPERIENCED IN MACHINES
USED FOR THE PURPOSE OF DRYING, PARTS OF WHICH ARE ALSO APPLICABLE TO
OTHER MACHINES WHERE TUBES ARE EMPLOYED FOR THE CONDUCTION OF Cold
OR HEATED AIR,"
Our said Invention has reference mainly to machines in which tubes are employed
for conducting air for drying and other purposes. The tube plates of such machines
as usually constructed present a considerable flat surface which opposes the passage
of the heated or cold air required to be passed through the tubes, thus causing back
pressure upon the fan or blower, and considerable loss is thus sustained.
We propose to obviate or mitigate this defect by the use of tube plates formed
with tapering or bell-shaped holes or apertures, thus offering the minimum amount
of resistance to the current of air which it is desired to pass into and through the
tubes.
Another part of our Invention has reference to the employment of a fan made in
the form of an archimedian screw blade in the chamber or pipe into which the air
is conducted after its passage through the heating tubes; the screw blade is caused
to rotate by the current of air, and by this rotary motion prevents return of air.
D

page_text: Another part of our Invention has reference to equilizing the distribution of air
forced into a pipe or passage through a lateral aperture, and consists in providing
the inner surface of such pipe or passage with a wedge-shaped block or deflector of
peculiar construction arranged immediately over or opposite to the lateral aperture,
whereby the air enters the pipe or passage, by which arrangement the inflowing
current of air is split or divided and caused to flow in equal proportions or
approximately so in opposite directions, that is, towards the opposite extremities of
the pipe or passage.
Another part of our Invention has reference to the employment, for agitating the
substance to be dried, of longitudinal shafts placed over the floor on which the said
substance rests, the said shafts being arranged to rotate in fixed bearings, and
provided with lateral or radial beaters or forks, the free ends of which enter and
pass through the substance as the shafts rotate, thereby agitating or tossing it to
any required extent, and causing the air to pass freely through such substance.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Henry Wilson Kelly and John George M°Entagart in the Great
Seal Patent Office on the 13th February 1878.
HENRY WILSON KELLY, Mechanical Engineer, and JOHN GEORGE M°ENTAGART,
Commission Agent, both of Dublin, in the County of Dublin, Ireland. "IMPROVE-
MENTS IN APPARATUS FOR OVERCOMING THE BACK LASH EXPERIENCED IN MACHINES
USED FOR THE PURPOSE OF DRYING, PARTS OF WHICH ARE ALSO APPLICABLE TO
OTHER MACHINES WHERE TUBES ARE EMPLOYED FOR THE CONDUCTION OF COLD
OR HEATED AIR."
Our said Invention has reference mainly to machines in which tubes are employed
for conducting air for drying and other purposes. The tube plates of such machines as
usually constructed present a considerable flat surface which opposes the passage of
the heated or cold air required to be passed through the tubes; thus causing back
pressure upon the fan or blower, and considerable loss is thus sustained.
We propose to obviate or mitigate this defect by the use of tube plates formed
with tapering or bell-shaped holes or apertures, thus offering the minimum amount
of resistance to the current of air which it is desired to pass into and through the
tubes.
• Another part of our Invention has reference to the employment of a fan made
in the form of an archimedian screw blade in the chamber or pipe into which
the air is conducted after its passage through the heating tubes; the screw blade
is caused to rotate by the current of air, and by this rotary motion prevents the
return of air.
Another part of our Invention has reference to equalizing the distribution of air
forced into a pipe or passage through a lateral aperture, and consists in providing
the inner surface of such pipe or passage with a wedge-shaped block or deflector of
peculiar construction, arranged immediately over or opposite to the lateral aperture
whereby the air enters the pipe or passage, by which arrangement the inflowing
current of air is split or divided and caused to flow in equal proportions. or

page_text: approximately so in opposite directions, that is, towards the opposite extremities of
the pipe or passage.
Another part of our Invention has reference to the employment, for agitating the
substance to be dried, of longitudinal shafts placed over the floor on which the said
substance rests, the said shafts being arranged to rotate in fixed bearings, and
provided with lateral or radial beaters or forks, the free ends of which enter and
pass through the substance as the shafts rotate, thereby agitating or tossing it to
required extent and causing the air to pass freely through such substance. These
shafts may be caused to rotate either over the substance to be dried or within the
mass of such substance.
any
In order that our said Invention may be more readily understood and carried into
practice we will append a Sheet of Drawings, which we now proceed to describe.
Fig. 1 represents a sectional view of an apparatus in which B, B, is an ordinary pipe
showing the wedge-shaped block in position at a. As the air enters at the opposite
aperture or opening it is obvious that it will be caused to split and divide in approxi-
mately equal parts, and sent towards the extremities of the pipe as indicated by the
arrows. C shows the fan or archimedian screw blade, which rotates in fixed
bearings c, c, in the chamber or pipe into which the air is conducted after its passage
through the heating tubes. F, F, shows the tube plate made according to our
improved method for diminishing the resistance usually offered to the passage of the
heated or cold air required to be forced through the tubes F¹. H is the inlet, and
H the outlet.
Fig. 2 represents a plan of the tube plate seen in section at A, B, Fig. 1.
Fig. 3 represents a part of the apparatus which we propose to use for the purpose
of agitating or tossing the material to be dried, as above described.
Having thus described the nature of our said Invention and the manner in which
the same is to be carried into effect, we would have it understood that what we
consider to be novel and original, and therefore claim as the Invention secured to us
under the Letters Patent herein-before in part recited is,-
First. The employment of the wedge-shaped block a; the fan or archimedian
screw C; and the tube plate with tapering or bell-shaped holes F, F, all arranged in
the manner and for the purpose, substantially as specified.
Secondly. The herein-before described apparatus termed an agitator in combination
with the other herein-before described improvements in machines for drying and
other purposes.
In witness whereof, we, the said Henry Wilson Kelly and John George
McEntagart, have unto this our Specification set our hands and seals, this
Twelfth day of February, in the year of our Lord One thousand eight hundred
and seventy-eight.
HENRY WILSON KELLY.
(L.S.)
JOHN GEORGE MENTAGART. (Ls.)