Improvements in Implements for Scraping Steam-boiler and other Tubes Internally, to Remove. Soot and other Accumulations.
Year: 1891

page_text: Date of Application, 20th Jan., 1891-Accepted; 4th. Apr., 1891
COMPLETE SPECIFICATION.
Improvements in Implements for Scraping Steam-boiler and other
Tubes Internally, to Remove. Soot and other Accumulations.
We, EDWARD HEATHCOTE JEEVES, of Port Rowan, in the County of Norfolk,
in the Province of Ontario, in 'the Dominion of Canada, Merchant, and HARMON
GILLMORE, of the Village of St. Williams, in the County aforesaid, 'Mechanic,
do hereby declare the nature of the said invention for IMPROVEMENTS IN IMPLE-
MENTS FOR SCRAPING STEAM-BOILER AND OTHER TUBES INTERNALLY, TO
REMOVE SOOT AND OTHER ACCUMULATIONS, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement :-
.
Our invention has for its object to provide a simple and efficient scraper which
when forced by a handle through a tube shall conform to the entire circumference
of said tube, and also fit tubes of various sizes, for the detachment of scale, dirt, and
sooty accumulations, and gather and convey the same out of the tube at one
operation.
Figure 1, is a side elevation of my improved scraper,
Figure 2, is a longitudinal section of the same, and
Figure 3, is an end view.
Our invention consists of an implement having a hollow conical head provided
with free overlapping edges from the base to the apex, and a handle attached in any
suitable manner to the small end of the cone, whereby the cone will contract by
pressure from without, and preserve its form circumferentially.
A, represents the head of the scraper, made of a piece of sheet steel cut to proper
shape and bent to form a hollow cone, the edges overlapping and free to move over
the other, whereby the larger end of the conical head can be diminished in diameter
by circumferential compression, so as to preserve the circular configuration and fit
different tubes of various sizes, and expand within the tube, to have contact with
the internal circumference, and have sufficient elasticity to expand and follow the
tube internally.
The blank of steel forming the conical head of the scraper, is cut to shape to
provide a projecting lip E, at the larger end of the cone, to rest on the tube
internally prior to the scraper being thrust into the tube, so that by rotating the
handle or turning it in one direction, the head A, will spirally contract, thereby
causing the implement to effect easy entrance into the tube.
The smaller end of the conical head A, of the scraper is attached to a screw-
threaded shank B, to screw into the end of a tapped iron tube which forms the
handle C, or any other connection of the head to a suitable handle may be
adopted.
The shank B, or handle C, is attached to the head A, by rivets H, so as to leave
both overlapping edges D, F, free to contract and expand circumferentially
throughout the length of the head A, whereby the diameter of the base will yield
flexibly to suit various sizes of tubes; and the said edges D, F, may be beveled to
keep the circumference of the cone as nearly as possible a true circle.
If desired, the handle C, may be attached directly to the head A, and said handle
may be in jointed sections, to admit of being lengthened or shortened to suit the
length of the tube to be cleaned, and for convenience of transportation.
The shank B, is preferably formed with a polygonal shoulder G, to allow a
wrench to be used in screwing the shank to the handle.
To clean a boiler-tube, the larger end of the head A, is compressed to fit into the
tube and the conical head thrust through the tube by the handle, the circular edge
of the head A, will then by expansion, have contact with the interior of the tube

page_text: and cut away scaly matter and other accumulations, the cone gathering the material
as the scraper progresses through the tube.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, we declare that what we
claim is :-
A tube scraper, consisting of a piece of sheet steel cut to shape and bent to form
a hollow conical head A, having two free overlapping edges from base to apex, and
a shank B, or handle C, attached to the smaller end, so as to admit of the larger end
of the cone being contracted and expanded, while preserving a circular continuity,
as set forth, for the purpose described.
Dated the 20th day of December 1800
ALLISON BROS.,
Agents for the Applicants.