IMPROVEMENTS IN ARRANGEMENTS FOR HEATING ATMOSPHERIC AIR SPECIALLY WITH A VIEW TO ITS APPLICATION AS A DESIC- CATING AGENT IN CONNECTION WITH MACHINES FOR SIZING YARNS, CALICO PRINTING, PAPER STAINING, OR OTHERWISE
Year: 1878

page_text: PROVISIONAL SPECIFICATION left by Samuel Hallam at the Office of the
Commissioners of Patents on the 26th August 1878.
SAMUEL HALLAM, Engineer, of 46, Lancaster Avenue, Fennel Street, Manchester,
in the County of Lancaster. "IMPROVEMENTS IN ARRANGEMENTS FOR HEATING
ATMOSPHERIC AIR SPECIALLY WITH A VIEW TO ITS APPLICATION AS A DESIC-
CATING AGENT IN CONNECTION WITH MACHINES FOR SIZING YARNS, CALICO
PRINTING, PAPER STAINING, OR OTHERWISE."
My said Invention has reference to improved arrangements whereby atmospheric
air solicited or forced by a revolving fan or other exhausting or impelling
mechanism is caused to impinge upon and pass over the surface of a series of
steam or otherwise heated pipes, contained in a chamber or chest, and also to the
application in connection therewith of plates, or bafflers, or casing jackets, so placed
as to absorb the radiant caloric evolved from the heating pipes, and to transmit the
heat so absorbed to the air traversing the heating chamber.
In one modification of my Invention a number of inclined brass, copper, wrought-
iron, or other metal tubes are attached at their upper ends to a pipe suitably
formed to receive them, and which is itself connected by controlling cock or valve
to a main pipe communicating with a boiler or other steam reservoir. The lower
ends of these tubes are coupled to a similar pipe, from which the water resulting
from condensation is continuously withdrawn by any of the usual methods and
appliances available for such purpose.
Each series, as above described, forms one separate range, and is coupled
independently and separately to main steam and condenser water pipes, and
provided with suitable controlling and regulating cocks or valves. A number of
such ranges or series adequate to provide the necessary aggregate amount of
heating surface are included in a heating chamber of suitable capacity, and between
each range are placed partitions or plates of cast iron or other good heat recipient
or absorbent; upon the surfaces of such plates are formed at suitable intervals
projections or bridges, so placed as to compel the atmospheric air in its passage not
only to traverse, but also to continually cross and recross transversely the heating
Price 211

page_text: pipes; the plates themselves, at the same time, being highly heated by their
absorption of radiant heat serve also to augment the temperature of the body of air
which traverses their surfaces.
In another modification of my Invention each range or series consists of a
number of cast-iron or other metal pipes coupled at one end to a cast-iron chest
formed with a double chamber, into metal of diaphragm separating the two
chambers, the outer of which receives steam, whilst the office of the inner is to
collect water resulting from condensation, are securely fixed or screwed wrought
iron or other metal tubes of small bore, and these are spaced concentric with each
opening formed in chest to receive larger pipes, which larger pipes have flanges at
ono end to take faces on chest to receive them, the outer ends being plugged or
otherwise closed. The small inner pipes serve to convey the steam to the outer
end of each large tube, and in proportion as it condenses, owing to the inclination
given, the resulting water collects in inner chamber, from which it may be
continuously voided by any suitable effective appliance.
Each outer tube has either a number of parallel longitudinal ribs, a continuous
spiral feather, or series of projections or bafflers, cast or formed around it at
recurring intervals, and is surrounded by an outer jacket or case of just sufficient
capacity to pass over and rest loosely upon projections or ribs; the object of such
outer jacket being to absorb and retain radiant heat, and that of spiral feather ribs
or projections to augment heating surface, and also to break up and divide, and in
consequence, more thoroughly heat the current of air drawn or forced through the
intervals between outer case and pipe.