Year: 1887

page_text: Date of Application, 17th June, 1887.
Specification Accepted, 19th July, 1887.
I, WILLIAM OLIPHANT, of Jersey City in the County of Hudson, and State of New
Jersey, United States of America, Engineer, 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 :-
Referring to the accompanying drawing Fig. 1 represents an end elevation partly
in section, and Fig. 2 a similar side view of a steam generator embodying my
invention.
It is essential that a high temperature be unintermittingly maintained in a furnace
and in practice it has been found impossible to so arrange an ordinary boiler furnace
to admit under all circumstances the desired quantity of air necessary to support
combustion.
In order to maintain an even and uninterrupted temperature in the furnace and
still supply the combustible gases with the necessary amount of oxygen is the object
of my invention.
The invention consists in an apparatus connected with the furnace hereinafter more
particularly described whereby the temperature of the escaping products of combustion
are utilized to heat a current of atmospheric air which is conducted to, and delivered
from the sides or end of the furnace, through perforated tile, above the burning
fuel, intercepting the rising gases and combining therewith to promote more perfect
combustion.
In order that others may understand and apply my invention I will first proceed to
describe the details of an apparatus embodying the same, and subsequently to point
out in the claim its novel characteristics.
In the drawing, A, represents a steam generator set in brickwork with the furnace
smoke connections and chimney arranged in the ordinary way.
The attachment embodying my invention is shown arranged at the forward end of
the generator and consists of a hood B open at its under side and located outside of
and slightly above the ends of the fire tubes to intercept the escaping gases and deflect
the same downward through the connected pipe b, and into the Hue spaces c, from
whence they are delivered into the furnace D through the perforated walls or
partitions d.

page_text: E represents branch air conducting pipes leading from and open to the atmosphere
and connected to the pipes bat a point above the flue spaces C, as shown.
These branch air pipes E, are fitted at their outer and open ends with a flaring
mouth e which are preferably turned as shown toward the shell of the chimney in
order to take advantage of the atmospheric air current induced at this point by the
radiated heat of the chimney.
The operation of the apparatus will be readily understood from an inspection of
the drawing, the course of the furnace gases and the entering air being indicated by
the arrows.
The heated and rarified gases passing into the pipes b, causes the atmospheric air
to be drawn into the conducting pipes E, and a mixture takes place at the junction of
the pipes and within the flue spaces C, the combined air and gases being then delivered
in a mixed state through the perforated partitions d, into the rising products of
combustion in the furnace, thus supplying the oxygen necessary to a more complete
combustion uniformly and without extraction of furnace heat.
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 is :-
In an apparatus for promoting combustion, a hood B for deflecting the escaping
products of combustion located above the exit end of the fire tubes or flues and
provided with connected pipes b, b, leading to fine spaces C, C, arranged at the
sides of and communicating with the furnace D; branch pipes E, E, leading from and
open to the atmosphere and connected to the pipes b, b, above the flue spaces C, C,
substantially as shown and described.