An Improved Combined Scraper and Brush for Cleaning Boller Tubes.
Year: 1895

page_text: Date of Application, 19th June, 1895
Complete Specification Left. 22nd Aug., 1895-Accepted, 5th Oct., 1895
An Improved Combined Scraper and Brush for Cleaning Boller
Tubes.
I, CAMPBELL TAYLOR HENDERSON, Chief Engineer on Steamer "Princess
Victoria" Larne and Stranraer Steamers, 26 Station Street, Stranraer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to an improved combined scraper and brush for cleaning
boiler tubes.
The device consists of a screwed spindle having on it one or more spring cups,
held in place by means of nuts, and a metal or other suitable brush at the end.
The cups which are divided longitudinally into, preferably, two parts are slightly
tapered and have flanged scraping edges or rims. Adjustable washers or discs, or
equivalent, are provided on the spindle by means of which the spring cups can be
widened or opened out when necessary.
The brush may be circular. It may consist of one or more radial sets of wires
or spikes.
Dated this 18th day of June 1895
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.
An Improved Combined Scraper and Brush for Cleaning Boiler
Tubes.
I, CAMPBELL TAYLOR HENDERSON, Chief Engineer on Steamer "Princess
Victoria" Larne and Stranraer Steamers, 26 Station Street, Stranraer, 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 relates to an improved combined scraper and brush for cleaning.
boiler tubes.
The device consists of a screwed spindle having on it one or more spring cups,
held in place by means of nuts, and a metal or other suitable brush at the end.
The cups which are divided longitudinally into, preferably, two parts are slightly
tapered and have flanged scraping edges or rims. Adjustable washers or discs, or
equivalent, are provided on the spindle by means of which the spring cups can be
widened or opened out when necessary.
The brush may be circular. It may consist of one or more radial sets of wires
or spikes.
And in order that my said invention may be properly understood I have hereunto
appended an explanatory sheet of drawings, whereon,
Fig. 1 is a side view of the device.
Fig. 2 is a plan.

page_text: As shown on the drawings the screwed spindle a has on it a brush e, preferably,
composed of two sets of radial wires and held in place by a nut and washers h¹,
then four or other number of asbestos discs d also held in place by washers d¹ and
nuts g, f, then, at the rear of the nut, a sleeve or tubular distance piece i, which,
in conjunction with the second sleeve or tubular distance piece j, holds the two
spring cups b, c, in position on the screwed spindle. The distance pieces and cups
are held in position by the nuts l, m.
The cups b, c, of which there may be any desired number fitted on the spindle a,
are formed out of a single piece of spring steel bent and cut to the shape shown on
the drawings. It will be seen that the cups which are threaded on the spindle by
means of a hole at the back (see s at Fig. 4) are tapered or flared outwards and
are so divided or cut longitudinally at the sides as to form at the front end almost
a cylinder whilst at the back end they are flattened and narrowed to a U shape.
The widened out spaces or openings 62, c², left at each side give free access to the
washers k so that they can be easily adjusted on the tubes i, j.
Both cups are made with a cutting or scraping rim or flange and the flange b
of the first cup 6 may be serrated or toothed, as shown, in order to tear up the
hardened deposit whilst the flange c¹ of the second cup c, which may be left plain,
serves to clean out the tubes.
In order to widen or open out the divided cups when necessary, so as to fit tubes
of different diameters or to give any desired pressure, the movable washers k are
provided. These washers, which can be slid back and forward on the distance
pieces i, j, can be clamped in the position desired by means of screws k² passed
through lugs k' on the washers.
The wire brush e and asbestos discs & serve to clean out the scrapings left by
the action of the cups b, c.
The form of cup shown at Figs. 3 and 4 may be used when cleaning jointed
pipes. This cup o which is, preferably, made larger than the cups b, c, has its two
ends cut on a slant in opposite directions and provided with curved rims or
edges p, q, so as not to stick into or injure the joints. r, r¹ are the cut away parts
at the sides. When it is to be used this cup o is, or may be, added on to the
spindle a.
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
consider novel and desire to claim is :-
1. The construction or general arrangement and combination of parts of the
device for cleaning tubes, substantially as herein before described and shown on the
drawings annexed.
1
2. In combination, the spindle, the spring scraping cups fitted on the spindle,
and adjustable washers, or equivalent, for widening out the scrapers when
necessary, substantially as herein before described with reference to the drawings
annexed.
3. In combination, the spindle a, the spring scraping cups b, c, capable of being
widened out by adjustable washers k, and a brush or brushes e, substantially as
herein before described and shown on the drawings annexed.
Dated this 21st day of August 1895.
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.