Year: 1892

page_text: flanges a, that embrace the upper face of the jacket at the top of the boiler,
fitting closely thereto. Said frame being secured together at the rear by the
bolts c passing through the rear edges of the sides, whereby, by removing said
bolts the rear portion of the jacket may be removed, and the remaining portion
stripped from the boiler, as shown in Fig. 2, thus affording ready access to all the
interior parts thereof. In the ordinary manner of constructing boilers or heaters
of this kind, they are mounted upon a base or pedestal of metal or brick, that
forms the ash-pit below the grate of the fire-pot.
This base is expensive, and adds to the space occupied by the boiler, and is
remote from all water containing parts thereof, consequently the heat from the
under side of the grate is not utilized, thereby wasting a great per cent. of the
caloric products of fuel. In our improved boiler this objection is overcome by
doing away with the pedestal entirely, and forming the ash-pit directly within the
base F, proper, of the boiler, as shown at G in Fig. 2.
Said base is a hollow casting, trilateral in form, and is substantially rectangular
in cross section, the front of said base being open affords free access to the ash-
pit, enabling the ashes to be readily removed therefrom.
H designates the continuous vertical side pipes of the boiler, the lower ends of
which communicate with said basc F, and their upper ends with the hollow cap E.
I designates a series of horizontal pipes located above the grate J, and between
the adjacent sides of the boiler formed by the vertical pipes H. Said horizontal
pipes communicate, at their rear ends, with the base F, through the series of
vertical pipes K, and communicate, at their forward ends, with the cap E through
the series of vertical pipes L. Above the horizontal pipes I is located a series of
dependent or drop tubes M, the upper ends of which are secured in the cap E,
whose under face is provided with a series of holes a¹, as shown in Fig. 5, to
receive the upper ends of the pipes H, L, and tubes M, respectively.
N designates the front base-section, which is hollow like the base F, and extends
across the front of the boiler some distance above said base, forming the sill of
the stoke-hole O, as shown in Fig. 3, and also the front wall of the fire-pot, which:
is formed by said base-section, the vertical side pipes H, and rear pipes K, and
the grate J. The base-section N communicates with the base F, through the
short corner pipes H₁, and with the cap E through the corner pipes H and adjacent
pipes L, as shown in Figs. 2, 3 and 8. P designates a horizontal pipe, the forward
end of which communicates with the base-section N, and its rear end with the 3
vertical pipes K, through the coupling P¹, as shown in Figs. 3 and 4. Said pipe
crosses the fire-pot directly over the centre of the grate, thereby preventing the
over-heating and warping of the grate-bars.
The grate J, as shown in Fig. 10, is composed of a rectangular frame having
the rigid central bar R and the revolving side-bars S provided with the laterally 4
extending wings b. The rear ends of the bars S are provided with a journal c³,
that is secured in a suitable bearing e in the grate frame, as shown in Figs. 11
and 12. The forward ends of said bars are provided with the stem d, and the
right-angle shoulder i. Said stem is journaled in the bearing o having the vertical
slot o' through its upper portion, shown in Fig. 15. And the shoulder i bears 4
against the inner face of the grate frame, when the bar S is in its normal position,
as shown in Fig. 12. This manner of constructing the bars S and mounting them
in the grate, enables said bars to be readily removed, which is accomplished by
turning the bar over so that the shoulder i, will register with the slot o' in the
bearing o, when the bar may be slid forward, the shoulder entering said slot, and
the journal.c at its rear end being disengaged from the bearing e. The rear end
of the bar may then be raised, and the bar drawn rearward to withdraw its stem d
from the bearing o, when said bar may be removed from the grate.
The outer ends of the stems d of the bars S are squared, so as to enable the crank
or shaker T, shown in Fig. 3, to be applied thereto, by means of which said bars may 5
be rocked, to shake the ashes through the grate, or turned entirely over to dump
the ashes therefrom; and when desired, said bars may be turned on their edges, .

page_text: making a large opening through the grate, through which the entire contents of
said grate will fall.
The grate is supported in place by a series of posts U, U, U", set between the
vertical pipes H on each side of the boiler, and resting on the base F. Said posts
having the concave edge portions », (see Fig. 14,) that receive the peripheries of
said pipes, whereby said posts are retained in position. The rear posts U₁ are pro-
vided with the projecting brackets n, shown in Figs. 3 & 4, that support the rear
end of the grate. The forward end of said grate being supported by the arms
f
pivoted at their lower ends to the base of the front posts U, as shown in Figs. 3 and 8.
The upper ends of the posts U are provided with the lugs r, (see Figs. 13 and 14,)
between which, and the upper ends of the arms f, the forward end of the grate is
securely confined. To lower the front end of the grate, the arms are swung
outward, as shown in Fig. 13, when the front end of the grate will drop down into
the ash-pit, in which position it is supported by the brackets m on the centre posts U',
against which the lugs n on the under edge of the grate engage, as shown by dotted
lines in Fig. 3, and prevent the grate sliding forward. In which position of the
grate all clinkers may be removed therefrom, and by raising the front end of
the grate, so as to disengage the lugs n, said grate may be entirely withdrawn, for
repair or other purposes.
V designates a diaphragm, clearly shown in Fig. 7, which is located among the
drop-tubes M and through which said tubes pass, there being a space between
the edges of said diaphragm, and the vertical side and end pipes of the boiler, as
shown in Figs. 3 and 4. This diaphragm serves as a deflector to caloric current,
mingling the gases and air so as to insure perfect combustion, and throwing said
current out against the side pipes of the boiler, when it passes over the top of said
diaphragm and out the smoke-flue W through the cap E, thus retarding the volatile
products of combustion until thoroughly utilized. In the diaphragm V is an opening
that registers with the opening of the flue W, and which is controlled by a damper h,
actuated by the rod t, by means of which the damper may be opened to afford a
direct draught through the flue, when starting a fire or to cause the fire to burn
more briskly.
Z designates the hot feed-pipes leading from the cap E of the boiler, and Z' the
cold return-pipes entering the base F thereof. ✗ designates the jam-nuts of
the vertical pipes of the boiler, which are located at the bottom of said pipes on the
base F in the ash-pit, where the threads of said pipes are not eaten away by
the action of the products of combustion.
In the front of the casing or frame A, the upper door Y communicates with the
damper-rod t; the centre door Y¹ with the stoke-hole O, and the lower door Y" with
the ash-pit G, and forms the draught opening for the fire; also affording access to
the stems d of the revolving grate-bars.
From the drawings and foregoing description, it will now be apparent, that the
construction of this improved boiler is simple, economic and compact; in which all
the parts are readily accessible, and in which the arrangement is such, that the
return water is divided into a multiple of small columns and passed through
the fire-space in such manner as to receive the full effect of the entire product of
combustion, whereby the water is rapidly and intensely heated, and given an
accelerated circulation.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:-
Claim 1. In a boiler, the combination of the outer metal frame, the outer and
inner metal sheetings with an interposed layer of asbestos or like nonconducting
material, within said frame, and forming a removable jacket for the boiler,
substantially as specified.
Claim 2. In a boiler, the combination of the hollow trilateral base, the hollow
cap, a series of vertical pipes connecting said base and cap, the grate located

page_text: within the area inclosed by said vertical pipes and supported above said base,
substantially as set forth.
Claim 3. In a boiler, the combination of the hollow trilateral base, the hollow
cap, a series of vertical pipes connecting said base and cap, the grate located
within the area inclosed by said vertical pipes above the base, the hollow trans-
verse base-section located above the base at the front, and connected by vertical
pipes with the base and cap, as set forth.
Claim 4. In a boiler, the combination of the hollow trilateral base, the hollow
cap, a series of vertical pipes connecting said base and cap, the grate located
within the area inclosed by said vertical pipes above the base, the hollow base-
section crossing the front of the boiler above said base and communicating with
said base and cap, a series of horizontal pipes above the grate, communicating
at their rear ends with the base, and at their forward ends with the cap, sub-
stantially as specified.
Claim 5. In a boiler, the combination of the grate-frame having the transverse
rigid bar, and the revolving bars detachably journaled therein.
Claim 6. The combination of the vertical pipes and base, the grate located
within the area inclosed by said vertical pipes above said base, the brackets
supporting said grate at its rear end, the pivoted arms supporting said grate at
its forward end, whereby the forward end of said grate may be lowered, sub-
stantially as specified.
Claim 7. In a boiler, the combination of the base and cap connected by the
vertical pipes, the grate detachably supported within the area inclosed by said pipes,
the drop-tubes depending from said cap, the diaphragm located among said tubes,
and having the damper controlled opening that registers with the flue through said
cap, substantially as and for the purposes specified.
Dated this 19th day of April 1892.
HERBERT J. ALLISON,
Agent for the Applicants.