An Apparatus for Boring Out Lime or Salt from Boller Tubes.
Year: 1895

page_text: Date of Application, 11th May, 1895-Accepted, 13th July, 1895
J
COMPLETE SPECIFICATION.
An Apparatus for Boring Out Lime or Salt from Boller Tubes.
I, JOHANNES MARCKMANN, of 15 Johannisbollwerk, Hamburg, in the Empire
of Germany, Manufacturer, 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 refers to an apparatus for boring out the lime in the tubes of
boilers, which is suitable for cleaning the waterways, of boiler-fur, or salt, hitherto
considered impossible.
I will now describe the invention with reference to the accompanying drawings,
in which,
Fig 1 shows a plan view of my borer.
Fig 2 shows a section of same.
Fig. 3 shows a cross section of same on the line c― of Fig. 1.
Fig 4 shows a front view of the apparatus for working the borers.
Fig. 5 shows a section of a boilor tube with the borer at work, taken at the
line g-h of Fig. 4.
Fig. 6 shows a section of an end tube with a bolt bent at inner end for
holding the apparatus when at work, taken on the line e-f Fig. 4.
The borer itself 18 constructed with a head in the form of a rhymer which
contains from three to five blades 1, k, l, which are made moveable or adjustable
from within the head of the borer by means of the screw m, as shewn in Fig. 2.
The knives as they pass through the tube are caused to rotate and scrape the
lime or salt from off the interior of same.
0
As the borer cannot be operated conveniently in this manner without a
support, and as it also requires guiding, the apparatus shown in Fig. 4 is brought
into requisition, the action of which is as follows The borer with its three
to five blades is fastened to the end of the sorewed tubo n by means of a lug
and wedge p. This hollow screw n engages with the nutq placed in the
month of the boiler tube to be cleaned, as shown in Fig. 5. In order to give
the nut a firm and secure hold, it is made slightly conical on its circumference,
and 18 wedged firmly into the mouth of the boiler-tube by the angle bars v-w.
These angle bars are held in place at then euds by two nuts r, s, fastened at
the end of the screw olamping bolts. These clamping bolts pass through
the end tubes of the boiler, and by means of their bent muner ends grip the
bottom edge of the tube, and the muter can thus firmly lock them into position.
The bolts t, u, sei ve to hold the two angle-bars together.
A cross landle-bar is fastened on to the outer end of the screwed tube n,
by means of keys or wedges in slots as shown by y &z or in any suitable
way so as to permit the rod n and the borer to be easily worked round, and at
the same time pressed forward along the tube to be cleaned, whereby the lime in
the same is removed.
Should the rod be too short for the length of the tube to be cleaned, another
length of screwed rod inay be inserted between the handle and screwed part, by
menus of slots and wedges, as described.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim 16;
An apparatus for boring out the fur or salt from boiler tubes, distinguished

page_text: by a rhymer shaped head forming the borer, with three or more adjustable blades,
Baid heads being attachable to a tubular screw, which screw is guided by a nut
engaging therewith, said nut being held in place by angle-bars, held in position by
clamping bolts, and nuts, said borer being rotated by a cross bandle bar, as and
for the purposes herein descubed and set forth.
Dated this 11th day of May 1895.
S. S. BROMHEAD,
97 Newgate Street, London, E.C., Agent for Applicant.