An Improved Apparatus for Removing Scale from the Internal Surfaces of Steam Boilers.
Year: 1889

page_text: Date of Application, 2nd Nov., 1889
Complete Specification Left. 2nd Nov., 1889-Accepted, 7th Dec., 1889
PROVISIONAL SPECIFICATION.
An Improved Apparatus for Removing Scale from the Internal
Surfaces of Steam Boilers.
I, ROBERT ELLIOTT of 164 Rye Hill in the City and County of Newcastle-on-
Tyne Engineer do hereby declare the nature of this invention to be as follows :--
This invention has for its object to facilitate the removal by improved mechanical
apparatus of the thick and hardened saline or other scale or incrustation from such
internal parts of steam boilers as are difficult of access or quite inaccessible with the
ordinary scaling bars or hammers at present in use, the invention being particularly
applicable for the removal of incrustation from the sides and backs of combustion
chambers of marine boilers, the surfaces of the fire-boxes of Donkey and other upright
boilers, Galloway " tubes the fire-boxes of locomotives and like parts of steam
boilers.
The apparatus constituting this invention consists of a frame or strut, a suspending
rod which is fastened to this frame for localising the position of the mechanism a
shaft or pivot which works in and through and protrudes on both sides of the frame
a chipping tool or hammer a lever or arm, having the chipping hammer secured to
one end, the other end being fixed to the shaft at one side of the frame, a second
lever or arm that is fixed to the shaft on the other side of the frame, a rod that is
jointed to the second lever by which the mechanism is operated.
The frame may be of any desirable form one end of which is held by the
suspending rod upon the parts or surface of the boiler opposite to the part or surface
to be freed from scale in and through the other end of the frame the shaft works and
with it the levers which are fixed to the shaft on each side of the frame as herein-
before-described, the rod for operating the mechanism is jointed to the end of one of
the levers, to the end of the other lever the chipping hammer is fixed, so that when
the operating rod is worked the lever to which it is jointed works also, moving the
shaft partially around its centre and with it the lever to which the chipping hammer
is fastened, making the edge of the chipping hammer strike the surface to be
operated on.
This apparatus can be adapted to operate on parts or surfaces of the boiler which
would not be operated on by the apparatus in its present form, the suspending rod
by which the frame is held in its position is unfastened the remaining mechanism is
then turned around the axis of the frame so that the side which was the right side of
the apparatus now becomes the left, and the bottom side of the frame now becomes
the top the suspending rod is then fastened to the present top the lever to which the
operating rod is jointed is taken off the shaft and put on again in a position in a line
and exactly opposite to its first position on the shaft. To adapt this apparatus to
operate in a space or aperture of varying width or taper a distance piece of requisite
length is fastened to the end of the frame which bears on the surface of the boiler
opposite to the part to be scaled or operated on.
The details constituting the ways in which my Invention may be performed such
as the manner of attaching the lovers to the shaft, the kind of lever used, the part of
the frame to which the suspending rod is fastened and the form of chipping hammer
and clipping hammer handle can be varied without departing from the nature of my
invention as here-in-before defined for example the lever or arin to which the operating
rod is jointed can be extended past the shaft and another pin fixed in the extended
part at the same distance from the centre of the shaft as the pin which is jointed to
the operating rod when the mechanism is turned over to adapt it to scale certain parts
of the boiler as here-in-before described, the operating rod is transferred from one pin
to the other. the lever remaining fixed to the shaft, the suspending rod can be fastened
to the end of the frame opposite to that which rests on the surface or part of the

page_text: Doner when the apparatus is in operation the lever or arm to which the chipping
hammer is attached can be done away with and the handle of the chipping hammer
bent in a requisite manner and fastened to the shaft can be used instead and the
chipping hammer can be made with one, two or more sharp edges or points:
Dated this Thirty-first day of October 1889.
ROBERT ELLIOTT,
Applicant.
COMPLETE SPECIFICATION.
An Improved Apparatus for Removing Scale from the Internal
Surfaces of Steam Boilers.
I ROBERT ELLIOTT of 164 Rye Hill in the City and County of Newcastle-on-Tyne
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 has for its object to facilitate the removal by improved mechanical
apparatus of the thick and hardened saline or other scale or incrustation from such
internal parts of steam boilers as are difficult of access or quite inaccessible with the
ordinary scaling bars or hammers at present in use the invention being particularly
applicable for the removal of incrustation from the sides and backs of combustion
chambers of marine boilers the surfaces of the fire-boxes of Donkey and other
upright boilers "Galloway" tubes the fire-boxes of locomotives and like parts of steam
boilers.
And in order that my said invention may be fully understood I shall now proceed
more particularly to describe arrangements according thereto and for that purpose
shall refer to the several figures on the accompanying sheet of drawings the same
letters of reference indicating corresponding parts in all the figures. Figures 1, 2
and 3 on the accompanying sheet of drawings shew in plan side and end elevations
respectively an apparatus constructed according to my invention, a strut or frame A
having the bosses A¹ and A² formed on its top and bottom sides the suspending rod B
is screwed into the boss A¹ and is locked or fixed by the nut b, the shaft C which
works in and through and protrudes on both sides of the frame A the lever or arm E
having the chipping tool D secured to one end by the nuts e and e¹ the other end is
fitted upon the shaft C and secured in its requisite position by the key (on one side
of the frame A on the other side of the frame A another lever F is fastened to the
shaft C in such a manner that it can be easily taken off and put on in an opposite
position and in a line with its first place on the shaft C when required, the part of the
shaft C which protrudes past the frame A is cut so that the section through the shaft
will be a square, one end of the lever F is fitted on to the square end of the shaft C
and is held in its requisite position by the washer c¹ and the screw c² the end of the
rod G is formed into a single eye that works on the pin F this pin F¹ is solid with
the lever F, the washer fand the split pin f' prevents the single eye from coming off
the pin F¹.
To adapt this apparatus to operate in a space or aperture of varying width or taper
a distance piece is fastened to the end of the frame A. Figure 6 shews the side
elevation of the distance piece A which can be fastened to the end of the frame A
by the pin a. Figure 14 shews the side elevation of the apparatus in a position for
working, with the distance piece A' which can be of any requisite length fastened to
the frame A. In order to work this apparatus the end of the frame A or as shewn in
figure 14 the distance piece A is beld upon the surface of the boiler opposite to the
part or surface which has to be freed from scale, by the suspending rod B the rod G
is worked to and fro moving the lever F and making the shaft C take a part of a
revolution around its centre and with it the lever E making the sharp edge of the
chipping tool D which is fastened to the end of the lever E as liere-in-before described
strike the part or surface of the boiler which has to be freed from scale. This
apparatus can be adapted to operate on parts or surfaces of the boiler which could

page_text: not be scaled by the apparatus in its present form the figures 4 and 5 shew the side
and end elevations respectively of the apparatus in its new form the suspending rod B
has been unscrewed from the boss A' and the remaining mechanism has been turned
around the axis of the frame A so that the side which was the right side of the
apparatus now becomes the left and the bottom side with the boss A² upon it now
becomes the top the suspending rod B has been screwed into the boss A2 and the nut b
has been screwed down locking the rod B in its position the lever F has been taken
off and put on the opposite side of the shaft C and in a line with its first position the
washer, c' and the screw c³ securing it as here-in-before described.
Figure 15 shews a side elevation of the apparatus in its present form in a position
for working.
Figures 7 and 8 shew in side and end elevations respectively a form of lever a chipping
tool and handle which can be used in the place of the lever E and the chipping tool D
shewn in the figures 1, 2 3. 4 and 5 and here-in-before described the chipping too! D'
can be solid with the handle D2 or they can be made separately and the chipping
tool D can be secured to one end of the handle D by suitable means, the end of the
handle D that enters the lever E¹ has a section in the form of a square and is
secured by the two nuts and the chipping tool and the chipping tool handle can
have their respective positions reversed when required. Figure 9 shews the side
elevation of a form of chipping tool D³ and handle or lever D the chipping tool D³
is fastened to the end of the handle or lever D by the nut d the other end of the
handle D enters a hole that is cut through the shaft C and is held in its requisite
position by the nuts d³ and d the lever D can be used in the place of the lever E
shewn in the figures 1. 2. 3.4 and 5 and here-in-before described the handles or
levers D2 shewn in figures 7 and 8 and D shewn in figures 9 can be bent to any
requisite form.
Figures 10 and 11 shew the side and end elevations respectively of a lever F
which can be used in the place of the lever F here-in-before described and shown in
figures 1. 2. 3. 4. and 5 the lever F' has two pins F and F the hole in the middle
of is cut square in order to fit the square end of the shaft C and is held in its
position when in use by the washer and the screw c².,
When the apparatus is changed from the form shown in figures 1. 2 and 3 to that
shewn in figures 4 and 5 and here-in-before described the lever F2 being once fixed to
the shaft Cin its requisite position need not be altered, the single eye of the rod G is
changed from one pin to the other instead of altering the position of the lever on the
shaft.
Figures 12 and 13 shew the side and end elevations respectively of a suspending
rod B and the mode of securing it to the frame A the stud a is partially screwed
into the end of the frame marked A³ shewn in figures 1. 2 and 1 the end of the
suspending rod B¹ is flattened out a little through this end a hole is cut of requisite
size and form to suit the part of the stud a upon which it is threaded and the rod B¹
is held in its requisite position by the nnt a³. The levers which are shewn in
figures 1. 2. 3. 4. 5. 7. 8 10. 11. 14 and 15 and here-in-before described can be
fastened to the shaft by one or more set bolts, that are screwed through the part of
the levers which surrounds the shaft.
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 of parts constituting the improved apparatus for removing scale
from the internal surfaces of steam boilers substantially as described with reference
to the drawings annexed.
Dated this Thinto first day at Outahas 1880
ROBERT ELLIOTT,
Applicant.