Year: 1887

page_text: Date of Application, 13th Aug., 1887
Complete Left, 14th May, 1888
Complete Accepted, 15th June, 1888
1, CONRAD CHRISTIAN SEVERIN KNAP, of Queen Victoria Street, London, in the
County of Middlesex, Engineer, do hereby declare the nature of this invention to be
as follows:-
ง
This invention consists of improvements herein-after described in the joint connec-
tions of tubulous steam boilers; and which said invention is an improvement or
improvements upon Letters Patent granted to me, and bearing date the 30th day of
December 1884, and numbered 17023.
I will describe my invention in connection with a "Root" steam boiler.
The joint connection consists essentially of a ferrule or short cylinder, coned,
contracted, or provided with, hemispherical ends, or tubular connecting pieces, whose
ends are portions of spheres, struck from different centres.
My invention consists in contracting, throttling, or corrugating the middles of the
said connecting pieces, or joint connections, to admit of the said pieces or connections
changing their form or figure, on expansion and contraction; and so thereby always
keeping their ends, up to the seats or bearings of the boxes and caps respectively.
In carrying out my invention, I take an open ended ferrule, or short cylindrical
piece, whose ends are contracted, coned, curved or sphered; and at the middle of the
said cylindrical connecting piece, I sink or bulge inwardly, an annular channel
swelling or the like, which makes the tubular connection throttled or narrowed
internally, at the said middle part; so that change of temperature, allows the length
of the connection to remain constant, as any variation taking place, makes the inwardly.
directed swelling, straighten out, or gather in, accordingly.
Instead of employing a single annular inwardly directed swelling or bulging, I
arrange a series of them, side by side, and at or about the middle of the said tubular
connection.
Thus, the middle of the tubular connection, is provided with a series of undulations,
or annular channels, arranged side by side, and with the bulgings directed inwardly ;
or both inwardly and outwardly, either in the same plain, or in different planes; ani
either of the same diameters, or of varying diameters.
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page_text: COMPLETE SPECIFICATION.
Improvements in the Joint Connections of Tubulous Steam Boilers.
I, CONRAD CHRISTIAN SEVERIN KNAP of Queen Victoria Street, London, in the
County of Middlesex, 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 :-
This invention consists of improvements hereinafter described, in the joint connec-
tions of tubulous steam boilers; and which said invention, is an improvement or
improvements upon Letters Patent granted to me, and bearing date the 30th day of
December 1884 and numbered 17023.
I will describe my invention, in connection with a "Root" steam boiler.
The joint connection, consists essentially of a ferrule or short cylinder, coned,
contracted or provided with, hemispherical ends, or tubular connecting pieces, whose
ends are portions of spheres, struck from the same on different centres.
My invention consists in contracting, throttling, or corrugating the middles of the
said connecting pieces, or joint connections, to adinit of the said pieces or connections
changing their form or figure, on expansion and contraction, and so thereby always
keeping their ends, up to the seats or bearings of the boxes and caps, respectively.
In carrying out my invention, I take an open ended ferrule, or short cylindrical
piece, whose ends are contracted, coned, curved or sphered; and at the middle of the
said cylindrical connecting piece, I sink or bulge inwardly, an annular channel swelling
or the like, which makes the tubular connection, throttled or narrowed internally, at
the said middle part; so that chango of temperature, allows the length of the
connection, to remain constant, as any variation taking place, makes the inwardly
directed swelling, straighten out, or gather in, accordingly.
Instead of employing a single annular inwardly directed swelling or bulging, I
arrange a series of them, side by side, and at or about the middle of the said tubular
connection.
Thus, the middle of the tubular connection, is provided with a series of undulations,
or annular channels, arranged side by side, and with the bulgings directed inwardly,
or both inwardly and outwardly, either in the same plane, or in different planes, and
either of the same diameters, or of varying diameters.
I will now proceed to describe with reference to the accompanying drawing, the
manner in which the same is to be performed.
Figure 1 represents in side elevation, a joint connection of a water tube boiler,
provided with improvements made according to my invention.
Figure 2 represents in vertical section, a portion of the head, and connections of a
"Root "
steam boiler, provided with joint connections as aforesaid.
In the said figures 1 and 2, the ends of the connection are made conical, or
portions of cones, which take into, or seat themselves within like cone seats, made
within the openings or passages in the boiler tube boxes, and in the ends of the caps
or bends respectively.

page_text: Figure 3 represents a joint connection, with its ends, which are portions of spheres,
struck from different centres, and which said connecting piece is shown with its ends
lying within coned seats, made within the openings and ends of the boiler tube boxes,
and caps or bends respectively.
Figure 4 represents a like joint connection, or connecting piece, as figure 3, but
with the hemispherical ends working within like hemispherical seats of both box, and
bend or cap.
Figure 5 represents a like connection, and parts as figure 4, but with the ends of
the connecting piece, struck from the same centre.
Figure 6 represents a coned end joint connection, with more than a single corrugation
within its middle.
a are boiler tube boxes, into which the ends of water tubes b, open. c are joint
connections, or connecting pieces, with coned ends, fitting and seating themselves
within like coned seats made within the boxes a, and caps or bends d, respectively.
The said joint connections, or connecting pieces, are provided with contractions or
corrugations about their middles, which admit of the said connections or pieces,
changing their form or figure, consequent upon expansion and contraction; and by
which means, the ends as aforesaid, of the connections or pieces, are kept up to their
seats, which thereby prevents leakage.
In figure 3, a is a portion of a water tube box, c is a joint connection, or connecting
piece, with its middle inwardly contracted or corrugated, and with its ends, which
are portions of spheres, struck from different centres, and which said ends, seat
themselves or lie within coned seats a³, d, of a box and bend, respectively.
In figure 4, a is a portion of a box, d is a portion of a bend, and c is a connection
piece, its with hemispherical ends lying within like seats a³, d², of the said parts a
and d.
Figure as aforesaid, is the same as that of figure 4, but with the ends of the
connecting piece struck from the same centre.
In figure 6, a is a portion of a box, d is a portion of a cap or bend, and c is a
cone ended joint connection, or connecting piece, provided with a number of corruga-
tions about its middle.
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 :-
First Contracting or corrugating inwardly and annularly, the middles, or the
middle parts of water tube boiler joint connections, or connecting pieces, whether
formed with conical ends, or ends which are portions of spheres, struck either from
the same centre, or from different centres, for the purpose, substantially as described
and set forth in figures 1, 2, 3, 4 and 5.
Secondly-Corrugating inwardly or outwardly, or both inwardly and outwardly,
the middle parts of the joint connections, or connecting pieces, of water tube boilers,
whether formed with conical ends, or hemispherical ends, struck from the same or
different centres, substantially as, and for the purpose, as set forth in figure 6.
TALL
1000
CONRAD CHRISTIAN SEVERIN KNAP.
By Henry Skerrett,
Agent for Applicant.