Improvements in Portable Hearths and other Hearths Used by Rivetters and others.
Year: 1887

page_text: Date of Application, 7th Dec., 1887
Complete Left, 11th Jan., 1888
Complete Accepted, 20th Apr., 1888
Improvements in Portable Hearths and other Hearths Used by
Rivetters and others.
WILLIAM LOGAN Foreman Joiner Sea View, Millum Terrace Monkwearmouth
Sunderland County of Durham, do hereby declare the nature of this invention to be
as follows:-
My Invention consists of certain improvements in Portable Hearths and other
Hearths used by Rivetters and others.
In order that my Invention may be thoroughly understood I have sent one sheet of
Drawings (in duplicate). Figures 1, and 2, showing side Elevations of Portable
Hearths and Figure 3, showing the plan, I have also put letters to the different parts
that will be hereafter mentioned, the same letters to each Figure, corresponding
with the same parts.
Firstly, Figure 1, shows my Invention. I set the Fire Pans Cat various suitable
angles to the Frame work D, the Frame work D to stand perpendicular when in use,
and the top ends of the Blast Pipes E at angles, and about parallel to the bottoms of
the Fire Pans C, or the sides of the Fire Pans can be perpendicular and the
bottoms only set at suitable angles.
My Invention is to almost prevent the slag or scars from clogging the Blast
Pipes E or getting down into the bellows and burning the bellows when bellows
are fitted.
Secondly, the Frame work D to stand perpendicular when in use as shown in
Figure 1, will not be so easily upset by the wind or anything coming accidentally
against them (which is often the case) and the contents of the Fire Pans C,, such
as Fire, Hot and Cold Rivets, Coals, and Fire irons, being thrown upon the workmen
working below when the Hearths are placed on the beams of the ships or on the
stagings.
Figure 2, shows the Side Elevation of the Hearths in use at present, you will see
by Figure 2, that the sides of the Fire Pans C are perpendicular, and the bottoms
re at right angles to the Frame work or horizontal, now to almost prevent the
lag or scars from getting into the Blast Pipes E, the Boys in attendance on the

page_text: Hearths set the whole of the Hearths over at various angles by means of pieces of
Wood FF (generally two pieces) or anything handy to suit the purpose as shown in
Figure 2, I have measured the angle shown in Figure 2, when the Hearth was in use
with 3 pieces of wood under. By such an arrangement they endanger the lives of
the workmen workin, below (which must of necessity be very often) for the Hearths
are easily and very often upset by the wind or anything coming accidentally. against
them (which is often the case) and the contents of the Fire Pans C such as fire, Hot
and Cold Rivets, Coals, and Fire irons, all being thrown below upon the workmen
when the Hearths are placed on the beams of the ships or on the stagings.
Dated this 6th day of December 1887.

page_text: Improvements in Portable Hearths and other Hearths Used by
Rivetters and others.
I, WILLIAM LOGAN, of Sea View, Millum Terrace, Monkwearmouth, Sunderland,
in the County of Durham, Foreman Joiner, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:—
1
This invention relates to portable and other forges or hearths such as are used by
riveters and others, and has for its object to provide for effectually preventing the
entrance of hot slag, scars or the like from the fire-pan into the blast-pipe.
Heretofore considerable inconvenience has arisen from the burning of the bellows
by pieces of hot slag or the like getting into the same through the blast-pipe; more-
over, frequent repairs are thus necessitated and the bellows aro rendered altogether
unfit for service in a very short time. Attempts have been made to obviate this defect
by tilting the entire forge or placing the same in an inclined position, but this is
objectionable, as the stability of the structure is thereby greatly decreased and it is
consequently liable to be upset, and to cause injury to workmen and others from the
heat or the weight of articles falling from the tire-pan.
Now, by my invention I avoid accidents of this nature, whilst preventing the
entrance of hot slag, scars or the like into the blast-pipe, that is to say, I provide for
preventing the entrance of hot slag or the like into the blast-pipe, without tilting the
forge.
I accomplish this result in some instances by making the whole of the fire-pan or
the bottom thereof inclined and the blast-pipe or a portion thereof correspondingly
inclined as hereinafter set forth.
In the accompanying drawing
Figure 1 is a side elevation of a portable forge constructed in accordance with my
said invention.
Figure 2 is a side elevation of a portable forge as heretofore constructed.
Figure 3 is a horizontal section on the line A, B.
C is the hearth or fire-pan. D, D are the legs supporting the same. E is the
blast-pipe.
The fire-pan C is set at an angle to the horizontal plane, so that the rear thereof,
through which the upper end of the blast-pipe E protrudes, is at a higher level than
the front of the said fire-pan.
The legs D which support the fire-pan Care either vertical or are spread out
towards the base so as to more effectually prevent upsetting of the forge, by giving
the same a more extended base.
It will be seen that, when a forge has its fire-pan inclined relatively to its base and
downward from the blast-pipe, the hot slag, scars and the like which, in the forges

page_text: heretofore constructed are liable to enter the blast-pipe and thus choke the same or
injure the bellows, will tend to fall towards the front of the hearth and will therefore
be effectively prevented from entering the nozzle or extremity of the last-pipe.
The sides of the fire-pan may be either at right angles to the bottom of the same, or
they may be vertical or at any other angle to the said bottom, which may be most
suitable for the class of work for which the forge is designed. The fire-pan may, if
desired, be made movable or adjustable.
It is not essential that the bottom of the fire pan C should be inclined, although I
prefer to make it so. When the blast-pipe is inclined or curved downward from the
back of the fire-pan, the entrance of slag or the like into the said pipe will be
prevented. It is, however, more advantageous to incline both the fire-pan bottom
and the blast-pipe.
Moreover, I do not confine myself to the special form of blast-pipe shown in Figure 1;
the said pipe may be otherwise formed if desired; for instance I sometimes make it
curved instead of inclined; or I make it in the ordinary manner and depend entirely
upon the incline of the bottom of the fire-pan for preventing the entrance of slag or
the like into the said pipe.
In other instances I make the blast-pipe perpendicular up to the lower edge of the
fire-pan C and then bent so that it extends parallel to the back edge of the said fire-
pan, the upper end being bent downward and extending through the fire-pan C
parallel, or nearly parallel, to the bottom thereof.
In Figure 2 I have illustrated the crude method heretofore generally adopted of
preventing the entrance of slag or the like into the blast-pipe, viz. by placing
blocks F of wood beneath the rear of the base of the forge.
Having now particularly described and ascertained the nature of my said inven
tion, and in what manner the same is to be performed, I wish it understood that I
claim
-
The improvements in forges whereby I provide for preventing the entrance of
slag or the like into the blast-pipe, without tilting the forge, substantially as herein-
before described.
Dated this 1st day of March 1888.
WILLIAM LOGAN.
Haseltine Lake & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.