Year: 1894

page_text: Date of Application, 7th Apr., 1894
Complete Specification Left, 1st Jan., 1895-Accepted, 9th Feb., 1895
A communication from abroad by JOHN TEARE, A-Beckett Street, Melbourne,
Victoria, Iron Merchant.
I, JAMES BENNIE, of 82 Gordon Street, in the County of the City of Glasgow,
North Britain, Steel Manufacturer, do hereby declare the nature of this invention
to be as follows, that is to say :-
This invention has for its object to improve and simplify the construction and
increase the efficiency of scrapers for cleaning the interiors of boiler tubes.
In a scraper tool made with the improvement the operating parts are two
half disks with sharpened or toothed edges, and fixed on rods one of which is
jointed to the other at a point a few inches distant from the disks. Between the
joint and the disks the two rods are encompassed by a sleeve a pin crossing between
the rods from one side to the other of the sleeve. The sleeve is fixed to a rod long
enough for working the scraper from beyond the ends of the tubes for which the
tool is made. The rod which has one disk on its end, and the rod of the other
disk jointed to it, is made with an eye to run upon the long rod; and if found
desirable it may be made about as long as that rod so that both rods may be
handled. When the sleeve is moved towards the disks it draws them together, and
when moved the opposite way its cross pin makes the disk rods separate so as to
expand the disks against the sides of the tube.
Dated this Sixth day of April 1894.
EDMUND HUNT,
Applicant's Agent.
A communication from abroad by JOHN TEARE, A-Beckitt Street, Melbourne,
Victoria, Iron Merchant.
I, JAMES BENNIE, of 82, Gordon Street, in the County of the City of Glasgow,
North Britain, Steel 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, that is to say:—
This invention has for its object to improve and simplify the construction and
increase the efficiency of scrapers for cleaning the interiors of boiler tubes.
In a scraper tool made with the improvement, the operating parts are two half
disks with sharpened or toothed edges, and fixed on rods jointed together, or to a
separate piece. Between the joint and the disks, the two rods are encompassed by
a sleeve, a pin crossing between the rods from one side to the other of the sleeve.
The sleeve is fixed to a rod long enough for working the scraper from beyond the
ends of the tubes for which the tool is made. One of the rods or the separate
piece is provided with an eye to run on the long rod, and may also be made with
[Price 8a.1

page_text: an extension to be handled like the other rod.
When the sleeve is moved towards
the disks it draws them together, and when moved the opposite way, its cross
pin makes the disk rods separate so as to expand the disks against the sides of
the tube.
And in order that the said invention and the manner of performing the same
may be properly understood I hereunto append a sheet of explanatory drawings,
to be hereinafter referred to, and showing examples of the improved tube
scrapers.
Figures, 1, and, 2, of the drawings are views, as at right angles to each other,
of one example, a part being supposed broken away, for convenience. Figures, 3,
and, 4, are similar views of another example. In these drawings the same
reference letters are used to mark the same or like parts wherever they ar
repeated.
In a scraper tool made with the improvements, and as shown in Figures, 1,
and, 2, the operating parts are two half disks, A, and, B, fixed on rods, C, and, D,
jointed to a piece, F, (or it might be to one another) at a point some inches
distant from the disks. Between the joint and the disks, A, and, B, the two
rods, C, and D, are encompassed by a sleeve, G, having a pin, H, (shown as part
of a rod, J, hereinafter mentioned, or which may be a separate_pin) crossing
between the rods, C, D, from one side to the other of the sleeve. The sleeve, G,
has attached to it a handle rod, J, long enough for working the scraper with from
beyond the ends of the tubes for which the tool is made. The piece, F, (or it
might be one of the rods, C, D) is made with an eye, K, to run upon the handle
rod, J; and, if found desirable, the piece, F, may be made with an extension, L,
indicated by dotted lines about as long as the handle rod, J, so that it may be
handled as well as the rod, J. When the sleeve, G, is moved by the handle rod, J,
towards the disks, A, and B, it draws them together thereby facilitating their
introduction into a boiler tube, and when moved the opposite way, its cross pin, H,
makes the disk rods, C, and D, separate or open so as to expand the disks against
the sides of the tube. If desired a spring, M, indicated by dotted lines may encircle
the handle rod, J, to act on the piece, F, and insure the disks, A, and, B, becoming
sufficiently separate.
In the example shown in Figures, 3, and 4, the rods, C, and D, are jointed to
each other, and are extended beyond the joint, so as to form rods, N, and P, and
an additional pair of disks, Q, and R. The rods, N, and P, are encompassed by a
sleeve, S, similar to the sleeve, G, and fixed to the handle rod, J. When the
handle rod, J, is pulled the sleeve, G (by its pin, H) and the sleeve, S, act on the
rods, C, D, N, and P, in a manner to separate the disks, A, and B, and close
the disks, Q, and R, and when the handle rod, J, is pushed the sleeves, G, and S,
effect the separation of the disks, Q, and R, and the closing of the disk, A, and B.
By moving the handle rod, J, in either direction therefore, either the disks, A,
and B, or the disks, Q, and R, can be made to act on the interior of the tube to be
cleaned.
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 :-
The combination in a boiler tube scraper, of two half disks, on rods jointed
together, with an encompassing sleeve, having a pin crossing between the jointed
rods, and arranged to close and open the rods and disks by longitudinal movements
of a handle rod or equivalent substantially as herein before described.
Dated this Thirty-first day of December 1894.
EDMUND HUNT,
Applicant's Agent.