Improvements in Apparatus for Removing Scale and Incrustation from the Inside and Outside of Tubes and from other parts of Steam Boilers and the like.
Year: 1889

page_text: 'Date of Application, 26th July, 1889
Complete Specification Left, 5th Apr., 1890-Accepted, 10th May, 1890
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Removing Scale and Incrustation
from the Inside and Outside of Tubes and from other parts of
Steam Boilers and the like.
We, JOHN PLATT, of the firm of Mather and Platt, of Salford Iron Works,
Manchester, in the County of Lancaster, Engineer, and THOMAS THORP, of the same
place Manager, do hereby declare the nature of this invention to be as follows :-
:-
Our improved apparatus is particularly adapted for removing scale and other
incrustation from the interior of tubes but is also applicable for cleaning the exterior
of tubes and other surfaces and it consists essentially of a small steam or compressed
air cylinder; the cylinder is provided with a piston the rod of which passes through
the head at the opposite end to which steam is admitted exhaust passages are made
round the periphery of the cylinder a short distance from the admission port. A
spring or springs is confined between the piston and the other head of the cylinder.
To the projecting end of the piston rod is secured an adjustable cam or equivalent
means for giving motion to the chipping tools which in one arrangement are carried
on spring pieces which are secured to the cylinder these spring pieces are bent or
have suitable pieces secured to them on which the piston rod cam or its equivalent acts.
In operation steam is admitted to the cylinder the effect of which is to drive the
piston outward until it uncovers the exhaust ports as soon as sufficient steam has
escaped the spring which has been compressed by the outward movement of the
piston forces the piston back and thus a rapid reciprocating motion is set up by
which means the cutters are caused to give a series of rapid light blows to the
scale on the tube so long as steam is admitted to the cylinder.
For convenience in manipulating the apparatus steam is preferably admitted to
the cylinder through a flexible tube or through a flexible joint or joints.
When in operation the apparatus tends to move forward in the tube but the
operator who holds the steam admission pipe in his hand can always move the
apparatus backward or forward and turn it within the tube. We may or may not
fix a ring (or rings) of cutters round the cylinder heads which act upon the tube
after the chipping tools the efficiency of the apparatus is further increased by the
exhaust steam which tends to soften the scale.
Various modifications may be made in the means for actuating the chipping tools
from the reciprocating piston rod.
In applying our invention to apparatus for cleaning the exterior of tubes we prefor
to make the cylinder of a suitable form to pass between the tubes to be cleaned
and we arrange the chipping tools so as to act to the best advantage.
For removing scale from the interior of boiler shells and the like slight alterations
of construction are made to give the cutters the necessary movement.
Dated this 25th day of July 1889.
.
H. B. BARLOW,
Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Removing Scale and Incrustation
from the Inside and Outside of Tubes and from other parts of
Steam Boilers and the like.
We, JOHN PLATT, of the firm of Mather and Platt, of Salford Iron Works,
Manchester, in the County of Lancaster, Engineer, and THOMAS THORP, of the sune
5 place, Manager, do hereby declare the nature of this said invention and in what
Price 8d1

page_text: manner the same is to be performed to be particularly described and ascertained
in and by the following statement :—
Our improved apparatus is particularly adapted for removing scale and other
incrustation from the interior of tubes but it is also applicable for cleaning the
exterior of tubes and other surfaces and it consists essentially of a small steam or
compressed air cylinder; the cylinder is provided with a piston the rod of which
passes through the head at the opposite end to which steam is admitted, exhaust
passages are made round the periphery of the cylinder a short. distance from the
admission port. A spring or springs is confined between the piston and the other
head of the cylinder. To the projecting end of the piston rod is secured an adjustable
cam or equivalent means for giving motion to the chipping tools which in one
arrangement are carried on spring pieces which are secured to the cylinder these
spring pieces are bent or have suitable pieces secured to them on which the piston
rod cam or its equivalent acts.
'
:
And in order that our invention may be fully understood and readily carried into
effect we will describe the accompanying Sheet of Drawings reference being had to
the figures and letters marked thereon.
.
Figure 1 is a longitudinal section and Fig. 2 an end view of a boiler or other tube
and our improved apparatus for removing scale therefrom. and Figs. 3, 4, 5. and 6
are transverse vertical sections taken respectively on the. lines A B, C D, E F
and G H, Fig. 1.
the
In these views-a designates the tube to be cleaned, b the steam cylinder,
exhaust ports made therein, c a tube or hollow stem through which steam compressed
air or other fluid under pressure is admitted to the interior of the cylinder b, d the
piston, e the piston rod, the spring coiled thereon and confined between two collars f¹.
one abutting against the cylinder head and the other against the piston; g is the cam
e, h are the
or tappet screwed or otherwise adjustably secured upon the piston rod
clipping or cutting tools carried on the spring pieces i which are fixed by screws j
to the head of the cylinder b and are provided with shoulders or projections i¹.
".
In operation steam is admitted to the cylinder b through. the hollow stem c the
effect of which is to drive the piston d outward until it uncovers the exhaust ports bl
any fluid in front of the piston escaping through the port or aperture 6²; as soon as
sufficient steam has escaped the spring which has been compressed by the outward
movement of the piston d forces the piston and piston rod e back and thus a rapid
reciprocating motion is set up and the tappet g constantly acts upon the projections. ¿¹
on the spring pieces by which means the chippers or cutters are caused to give a
series of rapid light blows to the scale on the tube a so long as steam is admitted to
the cylinder.
For convenience in manipulating the apparatus steam is preferably admitted to the
cylinder through a flexible tube or through a flexible joint or joints.
.
When in operation the apparatus tends to move forward in the tube but the operator
who holds the steam admission pipe in his hand can always move the apparatus
backward or forward and turn it within the tube a. We may or may not fix a ring
(or rings) of cutters round the cylinder heads which act upon the tube a after the
chipping tools h and the efficiency of the apparatus is further increased by the exhaust
steam which tends to soften the scale.
Various modifications may be made in the means for actuating the chipping tools
from the reciprocating piston rod.
In applying our invention to apparatus for cleaning the exterior of tubes we prefer
to make the cylinder of a suitable form to pass between the tubes to be cleaned and
we arrange the chipping tools so as to act to the best advantage.
For removing scale from the interior of boiler shells and the like, slight alterations
of construction are made to give the cutters the,necessary movement..
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to he performed we declare that what we claim is :-
1. The combination with a cylinder to which fluid under-pressure is admitted, of a
:
1

page_text: piston within said cylinder and arranged to be forced outward against the pressure
of a spring until exhaust ports having been uncovered and the fluid pressure in said
cylinder sufficiently reduced the spring forces the piston inward the reciprocating
motion of the piston thus set up being transmitted by the means herein shown and
described or their mechanical equivalents to the chipping tools or cutters.
2. The combination with the cylinder b provided with exhaust ports b', the piston d,
spring, piston rode and tappet 9, of the chipping tools supported on spring
pieces i secured to the cylinder b and provided with projections i all substantially as.
and for the purposes herein set forth.
Dated this 2nd day of Anvil 1000
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicante.
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicants.