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 Aug., 1891-Accepted, 26th Sept. 1891
COMPLETE SPECIFICATION.
Improvements in Implements for Scraping Steam Boiler and other
Tubes Internally to Remove Soot and other Accumulations.
I, EDWARD HEATHCOTE JEEVES, of Port Rowan, in the County of Norfolk,
in the Province of Ontario, in the Dominion of Canada, Merchant, 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:-
My invention relates to an improvement in tube scrapers of that kind which
consist of a piece of sheet steel cut to shape and bent to form a hollow conical head
having two free overlapping edges from base to apex, and a shank or handle
attached to the smaller end, and my invention has for its object to limit and reduce
the expansion of the scraper and adjust it to scrape tubes internally either hard or
lightly or with more or less friction.
My invention consists of a bell-shaped socket, the smaller end screwing on the
shank or handle and the larger end extending over the smaller end of the cone head of
the scraper, so that by turning the socket to screw against the scraper head, said
head will be circumferentially contracted at the larger end to suit the tube to be
scraped by the free end of the socket pressing against the exterior of the cone.
Figure 1, is an external view of a tube scraper embodying my improvement.
Figure 2, is a longitudinal section of the same, and
Figure 3, is an end view of the scraper to which my improvement is applicable.
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 one 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 to fit 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, to cut away scale or dislodge accumulations in the tube.
The smaller end of the conical head A, of the scraper is attached to a handle C, by
a shank B, or said handle may be attached directly to the head or other suitable
means of connection of the head to the handle may be adopted.
The handle or shank is attached to the head so as to leave both overlapping
edges D, F, free to contract and expand circumferentially throughout the length of
the heal, whereby the diameter of the base will yield flexibly to suit various sizes
of tubes.
The foregoing is a brief description of a tube cleaner to which my improvement
is applicable, and I will now proceed to describe my invention.
G, is a bell-shaped socket or a socket having a contracted end screwing on the
shank B, or handle C, as may be desired, and the larger end of said socket extends
over the smaller end of the cone head A, of the scraper, so that when the socket
is screwed towards the head A, the larger end of the socket will press against the
outside of the head A, and forcibly contract the larger end to suit the tube to be
scraped, and by adjustment of the screw socket to the proper degree, the scraper
may be made to pass through the tube with greater or less friction, according to
the density of the matter in the tube, and whose removal is desired.
H, is a ring follower or washer through which the smaller end of the cone head A,
is passed before screwing the socket in place, and said ring seats against the outside
of the cone scraper-head and receives frictionally the thrust of the socket G, while
contracting the head A, as previously described, but said ring or washer may be
dispensed with, if desired.

page_text: J, is a coupling connecting the screw shank C', of the handle C, to the screw
shank B, of the head A, for convenient disconnection.
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,
1. The combination with the cone head A, having free overlapping edges from
base to apex and a shank or handle secured to the smaller end, of a socket G,
having a contracted end screwing on said shank or handle, and extending over the
outside of said cone head, so that by screwing said socket the larger end of the
cone head will be contracted by pressure of the socket thereon, as and for
the purpose set forth.
2. The combination with the contracting and expanding cone head scraper A,
having a shank or handle attached to the smaller end, of the screw socket G,
screwing on said shank or handle, and a washer or ring H, intervening said head
and the end of the socket to frictionally receive the thrust of the socket when con-
tracting the head, as set forth.
3. The combination with the scraper head A, having a shank B, of the screw
socket G, coupling J, and handle C, as set forth.
Dated this 31st day of July 1891.
EDWARD HEATHCOTE JEEVES.