Improvement in Boiler-tube-cutters.
Year: 1896

page_text: Improvement in Boiler-tube-cutters.
I, LUDWIG DANIELSEN, Machinist, at Hamburg, Grosse Bleichen 40, in
Germany, do hereby declare the nature of this invention to be as follows:-
The present invention concerns a tube-cutter to be utilized when damaged
boiler-tubes are to be substituted by new ones.
Up to date an efficacious utensil for such a purpose has been missing and when
damaged boiler-tubes were to be replaced by fresh ones, the old had to be chiselled
out with great painstaking.
I attain these objects by the mechanism illustrated in the accompanying drawings
in which, Fig. 1 is a lateral view and partial cross-section. Fig. 2 is a cross-section
along the line (A, B) of Fig. 1 and Fig. 3 a cross-section along the line (C, D) or
a representation of the front-side respectively, whereas Fig. 4 explains the working
of the tube-cutter.
Similar letters refer to similar parts throughout the several views.
(a) is a body of cylindrical form of adequate dimensions shaped into a hexagon (b)
on its side of application.
According to the interior width of the tube to be cut off a socket (c) exactly
filling up the width is placed upon the cylinder (a), limited by the screws (d) and
the ring (p), tightened by the screw (g). The socket (c) will sit very close to
the inner side of the tube, thus giving to the whole device the proper centric
position. For different widths of tubes sockets of different thickness are, of course,
to be chosen.
The body (a, b) has an eccentric boring, through which passes a shaft (c) in its
fore-part shaped into a screw (f) and fitted with the nut (g) and the counter-nut (h).
On the other end the shaft (e) is shaped into the part (1) carrying the cutter (n)
secured in the groove (m) by the screw (o).
By turning the eccentric shaft (e) the cutter (n) protruding from the piece (1) is
gradually pressed against the inner-sides of the tube to be cut, for as shown
in Fig. 4 where (u) represents a half cut tube, the dotted circle (v) shows the path
of the advancing cutter (n) eccentrically to the axile rotation of the cylinder (a).
This advance is effected by operating upon the counter-nut (4). On the front side
of the apparatus there are fitted, rigidly united with (e), the cogged-wheel (r), and
the clicks (s1, s2, s 3) pressed by the springs (t 1, 2, 3) of the encircling ring (k).
The clicks (s) are located in such a way that the eccentric rotation of the cutter (n)
advances only by of the widtn of a tooth so that the cutter (n) advances without
requiring great efforts.
The cut-off tubes are removed through the man-hole of the boiler whereas the
remaining ends can easily be pushed out. Even when only a partial substitution of
boiler-tubes is to take place the tube-cutter will prove very useful from its easy
manipulation and efficacity, the tubes being cut without bending and easily removed
through the tube- holes.
Dated. Hamburg. 24th of November 1896.
LUDWIG DANIELSEN,
By Carl O. Lange,
Agent for Applicant.

page_text: I, LUDWIG DANIELSEN, Machinist, at Hamburg, Grosse Bleichen 40, in
Germany, 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:-
The present invention concerns a tube-cutter, to be utilized when damaged
boiler-tubes are to be substituted by new ones.
Up to date an efficacious utensil for such a purpose has been missed, and when
damaged boiler tubes were to be replaced by fresh ones the old had to be chiselled
out with great trouble.
I attain these objects by the mechanism illustrated in the drawings left with the
Provisional Specification, in which, Fig. 1 is a lateral view and partial cross-section.
Fig. 2 is a cross-section, along the line A, B, of Fig. 1 and Fig. 3 a cross-section,
along the line C, D, or a representation of the front side respectively, whereas
Fig. 4 explains the working of the tube-cutter.
Similar letters refer to similar parts throughout the several views.
a is a body of cylindrical form of adequate dimensions shaped into a hexagon (b)
on its side of application.
According to the interior width of the tube to be cut off, a socket (c) exactly
filling up the width, is placed upon the cylinder a, limited by the screws d, and
the ring p, tightened by the screw 9. The socket c will sit very close to the
inner side of the tube, thus giving to the whole device the proper centric position.
For different widths of tubes, sockets of different thickness are, of course, to be
chosen.
The body a, b, has an eccentric boring, through which passes a shaft e in its
fore-part, shaped into a screw fand fitted with the nut g, and the counter-nut h. On
the other end, the shaft e is shaped into the part I carrying the cutter n secured in
the groove m by the screw o.
is
By turning the eccentric shaft e the cutter n protruding from the piece
gradually pressed against the inner-sides of the tube to be cut, for as shown in
Fig. 4, where u represents a half cut tube, the dotted circle v shows the path
of the advancing cutter n eccentrically to the axile rotation of the cylinder a.
This advance is effected by operating upon the counter-nut h. On the front sile
of the apparatus there are fitted, rigidly united with e, the cogged-wheel, and
the clicks & 1, s 2, s 3 pressed by the springs t 1, 2, 3 of the encircling ring k. The
clicks are located in such a way, that the eccentric rotation of the cutter n advances
ouly by of the width of a tooth, so that the cutter n advances without requiring
great efforts.
The cut-off tubes are removed through the man-hole of the boiler, whereas the
remaining ends can easily be pushed out. Even when only a partial substitution of
boiler tubes is to take place, the tube-cutter will prove very useful for its easy
manipulation and efficacity, the tubes being cut without bending and easily removed
through the tube-holes.
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:
The combination, in a boiler-tube cutter, of a tool-body a, rotatory in the tubes
to be cut, and centered by means of sockets c, placed upon it, proportionated in their

page_text: dimensions to the width of the boiler-tubes to be worked upon; the gradual advance
of the cutter n fitted to it, being effected by means of the eccentric shaft e rotatory
in a and secured by clicks.
Dated Hamburg 15th dow of May 1807
LUDWIG DANIELSEN,
By Carl O. Lange,
Agent.