Year: 1888

page_text: Date of Application, 28th Jan.. 1888
>pecification Accepted, 2nd Mar., 1888
I, OLIVER HOWARD GENTRY of Opelousas in the Parish of St. Landry and State of
Louisiana in the United States of America, Gentleman, do hereby declare the nature
of my invention, and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:-
My invention relates to an improvement in steam boilers and it consists in the
peculiar construction and combination of devices that will be more fully set forth
hereinafter and particularly pointed out in the claims.
In the accompanying drawings
―:
Fig. 1 is a vertical longitudinal central sectional view of a steam boiler embodying
my improvements.
Fig. 2 is a vertical transverse sectional view of the same, taken on the line a--a
of Fig. 1.
Fig. 3 is an enlarged detail sectional view.
A represents a pair of circular drums of suitable length and diameter which are
provided in their outer side with openings B, and on their inner sides with
openings C, which are much larger than the openings B and are concentric therewith.
D represents a series of horizontal water tubes of suitable diameter, which have
their ends connected to the openings C, and extend from one drum to the other,
thereby supporting the drums in vertical position. The said drums are supported
upon a setting of brick work or masonry E of the ordinary construction and a
covering or case F extends upward from the wall of this setting and envelopes the
boiler. This covering or case is shown as made of brick-work. In one end of the
setting is constructed a combustion chamber G having an ash pit H below it, a
grate I being arranged between the combustion chamber and the ash pit in the usual
manner.
On the front side of the boiler and communicating with the opening B in the front
boiler, is arranged a smoke stack K, which is secured to the drum A and steami
drum O, by means of bolts L.
M represents a mud drum, which is arranged transversely under the lower side of
the rear drum A and communicates therewith through a short vertical pipe N.
O represents a steam drum which is arranged horizontally over the water drums and
communicates with the upper sides thereof through short vertical pipes P.

page_text: The outer sides of the drums A are connected by means of horizontal flues R, the
ends of which extend through the openings B, the said flues R extend centrally
through the water tubes D.
7
One end of each of the said flues R is swaged and provided with an annular
flange S, which extends laterally therefrom and bears against the outer side of the
rear drum A, the opposite extremities of the flues R are screw threaded and are
extended through the outer side of the front drum A, and non-corrosive nuts T are
screwed onto the said threaded extremities of the flues and bear against the outer
side of the rear drum and thereby effectually secure the flues thereto. The outer
sides of the said nuts are bent over inwardly so as to form lips U that cover the ends
of flues R and preserve the same from direct contact with the fire. The inner edges
of the said lips are flush with the inner sides of the pipe R, to prevent the said lips
from obstructing the passage of the products of combustion through the said
pipes R.
When the boiler is filled, the water in the drum A and the tubes D entirely
surrounds the flues R, which extends through the ends of the said tubes.
When a
fire is started in the furnace, the smoke, flames, heat and products of combustion
pass upward around the water tubes and circulate around the same in the direction
indicated by the arrows in Fig. 1 until they reach the rear drum A when they deflect,
pass under the said rear drum and then pass forward through the flues into the
stack K, up which they escape.
By providing the drum with the connected water tube D and by providing the
tubes I which extend longitudinally through the water tubes and through the drums A,
the boiler is given a maximum amount of heating surface, and consequently steam can
be generated therein with the smallest possible amount of fuel.
The boiler will of course be provided with the usual safety valve, try cocks and
water indicator not necessary to be shown.
The smoke stack K is provided with a door L² (see Fig. 1) by means of which
access to the smoke stack can be obtained for the purpose of unscrewing the nuts T
and cleaning the flues.
Having now particularly described and ascertained the nature of my said, inven-
tion, and in what manner the same is to be performed I declare that what I
claim is :-
1. In a tubular boiler, the combination of the drums A the water tubes D con-
necting the same, the flues R extending longitudinally through the centres of the
water tubes and through the drums, the mud drum M arranged under one of the
drums A and communicating therewith, the steam drum O arranged above the drum A
and communicating therewith, and the smoke stack K, substantially as described.
2. In combination with the tubes R, the nuis T screwed over one end of the flues,
the outer sides of the nuts being hent inwardly so as to form lips U that cover the
ends of the flues, as set forth.
D
T
thin 30LL dan of L 1000