Improvements in Apparatus for Removing Inorustation and the like from Boiler-tubes.
Year: 1895

page_text: Date of Application, 6th Mar., 1895
Complete Specification Left, 27th May, 1895-Accepted, 6th July, 1895
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Removing Inorustation and the like
from Boiler-tubes.
I, HENRI BASCHY, of 25 Hafenstrasse, Hamburg, in the Empire of Germany,
Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:-
In water-tube boilera, especially if stationary, the incrustation or other deposit
formed in the tubes by the feed-water is a very tangible drawback which is often
productive of danger and which has not hitherto been obviated even by means of
most efficient purification of the feed-water. Suitable tools for removing the
incrustation from such narrow tubes have hitherto not been obtainable, so that the
reliable cleaning of the boilers has involved great trouble and expense.
Apparatus according to my invention, which is represented in the accompanying
drawing (about full size in Figs. 1, 2, and 3 and to a reduced scale in Figs. 4 to 7),
enables the cleaning of such boiler-tubes to be effected in a simple and reliable
manner.
0
m is a
As shown in the longitudinal section Fig. 1, and the end view Fig. 2, the
apparatus comprises a casing a, on one end of which a cap bis adjustably screwed,
and at the other end of which are four forks o in which are pivoted four striking
chisels. Within the casing a there rests, near the forks and bearing against a
shoulder, the part of a double tooth-clutch, the said part being prevented from
rotating by scrow-pins for in any other suitable way. Against the part of there
lies the correspondingly toothed face of the loose part g of the clutch, the oppositely
toothed other side of which is in engagement with the toothed face of the part
of the clutch, which is permanently connected with the operating-rod_k.
tuppet-bar, which is screwed in the part h so as to be separable therefrom. Tho
tappet-bar m passes through the parts and g and carries at its outer end a head
formed with two flanges n between which are received tappets d' of the chisels d.
Between the part h and the nut b there is enclosed a powerful helical spring o the
force of which can be regulated by means of the nut b. If the rod & be rotated
to the right, the part h of the clutch will move on the part g in the way indicated
in Fig. 5, whereby the spring will be compressed and the chisels & drawn in.
Ou further rotation, the teeth of the clutch will pass one another and the part h
with the bar m and flanged head n will be caused by the spring o to rapidly move
forward and impel the chisels d into the position shown in Figs. 1 and 4. AB tho
result of this rotation, therefore, when effected with sufficient force blows will be
struck at short intervals by the chisels d that will knock off the incrustation or
other deposit.
On the rod being rotated to the left the loose part g of the clutch will be
carried round by the rod k and shifted on the part, whereby the spring o is
compressed and the chisels d caused to strike against the incrustation in the
manner just described. The arrangement of the clutch fg thus enables the
rod to be rotated, either to the right or to the left as desired or as required by
circumstances the result in each case being to operate the striking chisels d.
On the casing a there is adjustably mounted, with a certain amount of longi-
tudinal play, a sleeve p, which is prevented from rotating by a feather p¹ (Fig. 3).
On the sleeve p there are arranged four spring arms provided with rollers or fixed

page_text: cutters % which press into and score the incrustation and which also serve reliably
to guide the entire apparatus in the tube, either straight or helically according
to the position of tho said roller-cutters. The adjustability of the sleeve p on the
casing a is for the purpose of facilitating the work of expansion of the spring o, as
will be hereinafter pointed out.
The apparatus is placed into the tube to be cleaned from the rear end; and the
operating-rod k, or the extension thereof (Fig. 6) is advantageously fastened in a
hollow scrow-spindlo r, which is capable of being rotated in a frame s, or in a
bracket, by means of a hand-wheel t. The frames is fastened on the front of the
boilor or of the water chamber (Figs. 6 & 7). On the rotation of the hand-
wheelt, the operating rod k is also rotated and the cleaning-apparatus caused to
travel by the spindle. During this movement and the expansion of the spring o,
there would, but for the above mentioned capacity of the apparatus to move in
the sleeve, be an amount of work to do against friction, which would vary with
the hardness and the thickness of the incrustation but would always be con-
siderable. In the case of very hard incrustation, the hand-wheel is turned
backwards and forwards several times, whereby auy desired place in the tube can
be treated to the required extent.
In lieu of arranging the spindle k or its extension in engagement with tho
spindler, the casing a or the sleeve p may be so arranged.
Dated this 6th day of March 1895.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.
Improvements in Apparatus for Removing Incrustation and the like
from Boiler-tubes.
I, HENRI BASOHY, of 25, Hafenstrasse, Hamburg, in the Empire of Germany,
Mechanical 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 :-
In water-tube boilers, especially if stationary, the incrustation or other deposit
formed in the tubes by the feed-water is a very tangible drawback which is often
productive of danger and which has not hitherto been obviated, oven by means of
the most efficient purification of the feed-water. Suitable tools for removing the
incrustation from such narrow tubes as are used in water-tube boilers, have hitherto
not been obtainable, so that the reliable cleaning of the boilers has involved great
trouble and expense.
Apparatus according to this invention, which is represented about full size in
Figs. 1, 2, and 3 and to a reduced scale in Figs. 4 to 7 of the drawings filed with
my Provisional Specification, enables the cleaning of such boiler-tubes to be
effected in a simple and reliable manner.
As shown in the longitudinal section Fig. 1, and the end view Fig. 2, the
apparatus comprises a casing a, on one end of which a cap b is adjustably screwed,
and at the other end of which are four forks o in which are pivoted four striking
chisels d. Within the casing a there rests, near the forks c and bearing against a
shoulder, the part of a double tooth-clutch, said part being prevented from rotating
by screw-pins for in any other suitable way. Against the part there lies the
correspondingly toothed fuce of the loose part g of the clutch, the oppositely
toothed other side of which is in engagement with the toothed face of the part h
of the clutch, which is permanently connected with the operating-rod k. m is a
tappet-bar, which is screwed in the part à so as to be separable therefrom. The

page_text: nut b.
tappet-bar m passes through the parts and g and carries at its outer end a head
formed with two flanges n between which are received tappets d' projecting from
the chisels d. Between the part hand the nut 6 there is enclosed a powerful
coiled spring o the force of which can be regulated by means of the adjustable
If the rod be rotated to the right, or in a right handed direction, the
part of the clutch will move on the part in the way indicated in Fig. 5,
whereby the spring o will be compressed and the chisels d drawn in. On further
rotation, the teeth of the clutch will pass one another and the part / with the
bar m and flanged head n will be caused by the spring o to rapidly move forward
and impel the chisels d into the position shown in Figs. 1 and 4. As the result
of this rotation, therefore, when effected witli sufficient force, blows will be struck
at short intervals by the chisels d that will knock off the incrustation or other
deposit.
On the rod k, being rotated to the left, or in a left handed direction, the loose
part g
of the clutch will be carried round by the rod k and part hand shifted on
the part, whereby the spring o is compressed and the chisels d caused to strike
against the incrustation in the manner just described. The arrangement of the
clutch f g h thus enables the rod t to be rotated either to the right or to the left
as desired or as required by circumstances, the result in each case being to operate
the striking chisels d.
On the casing a there is adjustably mounted, with a certain amount of longi-
tudinal play, a sleeve p, which is prevented from rotating by a feather p¹ (Fig. 3).
On the sleeve p there are arranged four spring arms provided with rollers or fixed
cutters which press into and score the incrustation and which also serve reliably
to guide the entire apparatus in the tube, either straight or helically according to
the position of the said roller-cutters. The adjustability of the sleeve p on the
casing a is for the purpose of facilitating the work of expansion of the spring o,
as will be hereinafter pointed out.
The apparatus is placed in the tube to be cleaned from the rear ond; and the
operating-rod k, or, an extension thereof (Fig. 6) is advantageously fastened in
a hollow screw-spindler, which is capable of being rotated in a frames, or
in a bracket, by means of a hand-wheel t. The frames is fastened on the front
of the boiler, or of the water-chamber (Figs. 6 and 7). On the rotation of the
hand-wheel t, the operating-rod k is also rotated and the cleaning apparatus caused
to work and travel endways by the spindle. During this movement and the
expansion of the spring o there would, but for the above-mentioned capacity of the
apparatus to move in the sleeve p, be an amount of work to do against friction,
which would vary with the hardness and the thickness of the incrustation but
would always be considerable. In the case of very hard incrustation, the hand-
wheel is turned backwards and forwards several times, whereby any desired place
in the tube can be treated to the required extent.
In lieu of arranging the spindle & or its extension in engagement with the
spindler, the casing a or the sleeve p may be so arranged, the spindle & being then
held stationary.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
1. For removing incrustation and the like from the inner surfaces of boiler-tubes,
an apparatus comprising a casing provided at one end with hinged or pivoted
striking chisels d and arranged around a bar which passes through the said casing
and which, on being partly rotated, draws, with the help of a toothed coupling
such as described and shown, the striking chisels together and, on further rotation,
forces the same apart by spring-force, substantially as herein before described.
2. In apparatus of the kind specified in the preceding claim, the arrangement
on the casing a of a casing p capable of movement thereon and provided with
spring arms which are arranged around it and provided with rotary or fixed

page_text: cutters which score the incrustation and guide the apparatus within the boiler
tube to be cleaned, substantially as described.
3. For operating the apparatus specified in Claims 1 and 2, an arrangement
consisting of a hollow screw-spindle adapted to rotate in a frame or bracket
and to receive the rod or the casing of the apparatus substantially as herein.
described.
4. For, removing incrustation and tho, like, from boiler. tubes, apparatus
constructed arranged and operating substantially as described and shown,,
Dated this 27th day of May 1895.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.