IMPROVEMENT IN ELBOWS FOR STOVE PIPES
Year: 1885

page_text: I, ALONZO WHEELER, CRAM of 151 Merrimack Street Haverhill, in the County
of Essex, State of Massachusetts, Merchant, do hereby declare the nature of my
invention for IMPROVEMENT IN ELBOWS FOR STOVE PIPES, 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 elbows for stove-pipes; and it
consists in
1. The combination of a shallow cylinder, two loosely revolving heads, which are
clamped thereto, each one of which has an opening for the stove pipe, and which
openings can be turned either so as to register with each other, or into any desired
relation.
2. The combination of the cylinder, the heads applied thereto, each one of which
is provided with an opening for the stove pipe; and a damper which will both
uncover the opening in one of the heads so as to admit air into the cylinder, and
at the same time partially close one of the stove pipe holes, and thus regulate the
draft, as will be more fully described hereinafter.
The object of my invention is to provide a double elbow for stove pipes, by
means of which the ends of the pipes can be arranged in any desired relation to
each other, and thus make either a long or short elbow as may be required.
Fig. 1. is a vertical section taken through an elbow embodying my invention.
Fig. 2. is a section taken at right angles to Fig. 1, so as to show the damper.
Figs. 3 & 4, show modifications.
A, represents the cylinder, which is of any desired width, or depth, and to which
the two revolving heads B, are applied, and held in position by means of the
pivotal bolt C, which passes through them both. The outer edges of the two
heads are flanged, as shown, so as to project over the edges of the cylinder, and
thus form a tight joint. Upon this pivotal bolt, in between the two heads, is
placed a spiral spring D, which serves to force the two heads outward at their
centers, and thus cause a greater pressure at their outer edges against the edges of
the cylinder. Through each one of the heads is made an opening to receive the
ends of a stove pipe. As the heads can be turned freely around upon the cylinder,
the openings for the stove pipe can be brought in any desired relation to each
other. When these revolving heads are turned so as to bring the openings for the
stove pipes upon opposite sides of the center of the cylinder, the ends are separated
Prins A.73

page_text: to the greatest possible distance, and thus a long elbow is formed. When the heads
are turned so as to bring the openings near together, the cylinder forms a short
elbow. The great advantage in the construction above described, consists in
enabling an elbow to be formed just the length that is required for the purpose of
joining the pipes together, at the same time a heating drum is formed which assists
in heating the apartment.
Inside of this drum is placed a pivoted damper, P, which sweeps through a
portion of a circle, and which is made both to uncover an opening O, made in the
head, to one side of its center, and at the same time to partially close the opening for
the stove pipe, and thus regulate the draft. When this damper is moved so as to
partially uncover the opening O, the opening for the stove pipe is correspondingly
closed, and as fresh.air flows through the opening O, into the cylinder, the draft of
the stove is checked. By this means the heat can be controled as readily as by a
damper which is applied in the pipe, or some portion of the stove itself.
If prefered the cylinder may have one movable and one stationary head, and in
that case the movable head alone will be adjusted to suit the length of the pipe, or
the cylinder may be made in two parts which have their edges fastened together
so that one part can be turned upon the other.
Having thus described my invention, I claim
1. An elbow for stove pipes, consisting of a cylinder, in combination with
movable heads having openings for the ends of the stove pipes, whereby the
openings can be brought in any desired relation to each other, substantially as
shown.
2. In an elbow for stove pipes, the combination of the cylinder, the two revolving
heads provided with openings for the stove pipes, and a means for holding the heads
in place upon the cylinder, substantially as described.
3. The combination of the cylinder, the two revolving heads, the pivotal bolt,
and a spring which is placed upon the bolt, in between the two heads, substantially
as set forth.
4. The combination of the cylinder, the revolving heads applied thereto, and
provided with openings for the stove pipes, a means for holding the heads in
position upon the cylinder, and a damper which is applied to one of the heads,
substantially as shown and described.
5. An elbow for stove pipes, consisting of a cylinder, having an opening for the
end of the stove pipe, in combination with a revolving head, also having an opening
through the end of the stove pipe, substantially as shown.
6. An elbow for stove pipes, which is composed of two heads, which are loosely
connected together, with a flue space between them, one head being provided with
an opening, for the attachment of one part of the stove pipe, and one or both of the
heads being adapted to be revolved or turned upon the other, for the purpose of
changing the relation of the openings O, to each other, substantially as shown.
Doted this 20th day of June 1885