An Implement for Scraping the Interior of Tobacco Pipe Bowls.
Year: 1892

page_text: Date of Application, 4th Aug., 1892
Complete Specification Left, 4th May, 1893-Accepted. 10th June, 1893
PROVISIONAL SPECIFICATION.
An Implement for Scraping the Interior of Tobacco Pipe Bowls.
We ROBERT HAY of 27 Albion Street, Newcastle on Tyne in the County of
Northumberland, Merchant, and THOMAS WILLIAM HAY of 47 Jesmond Road,
Newcastle on Tyne aforesaid, Surgeon, do hereby declare the nature of this
invention to be as follows:-
The object of this invention is to provide a cheap and simple implement for
effectively removing the carbonaceous incrustation which forms upon the inner
surface of wood and other tobacco pipe bowls.
The pipe bowl scraper which forms the subject of this invention is made of metal
wire twisted or bent in such a manner as to form a spring fork, the two ends
forming the legs of the fork, which are splayed outwards. Each of the legs is at
its extremity furnished with or formed into a cutting blade, which tapers inwards
towards the bottom.
When the legs are forcibly pinched together, they may be brought close to each
other so that the backs of the cutting blades touch. The scraper is then adapted
When the
to fit into the smallest part or bottom of any ordinary pipe bowl.
pinching pressure is released from the legs, the springiness of the scraper will
cause them to return to their normal position which is sufficiently wide apart to
take into the top of the bowl of any ordinary sized pipe.
The operation of using the scraper so as to remove the carbonaceous incrustation
or matter which has become caked on the inner surface of a tobacco pipe bowl is
as follows: The legs are pinched together sufficiently to allow the cutting blades
to enter the top of the bowl. The scraper is then rotated or partially rotated and
worked gradually down towards the bottom as the carbonaceous incrustation is
removed. During the operation, the springiness of the scraper will keep the
blades close up to their work, the power of the spring varying with the degree of
compression to which it is subjected-i.e. -with the variations of the diameter of
the bowl.
To prevent the legs from twisting and to ensure that they keep their relative
positions diametrically opposite to each other as and when the implement is
rotated, a guide or guides is rigidly affixed to or on one or on both legs, into, or
with, which the other leg takes, or engages. A metal shield may be provided to
fit over the legs of the scraper when not in use.
Dated this 4th day of Ancest 1809
F. W. GOLBY,
36, Chancery Lane, London, W.C., Patent Agent for the Applicants.
COMPLETE SPECIFICATION.
An Implement for Scraping the Interior of Tobacco Pipe Bowls.
We ROBERT HAY of 27 Albion Street, Newcastle on Tyne, in the County of
Northumberland, Merchant, and THOMAS WILLIAM HAY of 47 Jesmond Road,
Newcastle on Tyne, aforesaid, Surgeon, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
The object of this invention is to provide a cheap and simple implement for
effectively removing the carbonaceous incrustation which forms upon the inner
surface of wood and other tobacco pipe bowls.

page_text: The pipe bowl scraper which forms the subject of this invention is made of
metal wire twisted or bent in such a manner as to form a spring fork, the two ends
forming the legs of the fork, which are splayed outwards. Each of the legs is at
its extremity furnished with or formed into a cutting blade, which tapers inwards
towards the bottom.
In the accompanying drawings Figures 1 and 2 shew slightly different pipe bowl
scrapers made according to our invention. Figure 3 is a sectional elevation on the
line ab of Figure 1.
When the legs A of the spring fork are forcibly pinched together, they may be
brought close to each other so that the backs B of the cutting blades C or the
parts carrying the cutting blades, as the case may be, touch or nearly so. The
scraper is then adapted to fit into the smallest part or bottom of any ordinary pipe
bowl. When the pinching pressure is removed from the legs, the springiness of
the scraper will cause them to return to their normal position, which is shewn in
Figures 1 and 2, when the cutting blades C are sufficiently wide apart to take into
the top of the bowl of any ordinary sized pipe.
The operation of using the scraper so as to remove the carbonaceous incrusta-
tion or matter which has become caked on the inner surface of a tobacco pipe
bowl is as follows:-The legs A are pinched together sufficiently to allow the
cutting blades C to enter the top of the bowl. The pinching pressure is then
removed when, by reason of the tendency of the spring to return the parts to
their normal position, the cutting blades C will be caused to bear against the
carbonaceous material incrusted on the interior of the pipe bowl. The device is
then rotated or partially rotated and worked gradually down towards the bottom
of the pipe bowl as the carbonaceous incrustation is removed. During the
operation, the springiness of the scraper will at all times keep the cutting blades C
close up to their work, the power of the spring varying with the degree of
compression to which it is subjected-i.e. -with the variations of the diameter of
the bowl.
To prevent the legs A from twisting and to ensure that they keep their relative
positions diametrically opposite to each other as and when the implement is
rotated, a guide D is rigidly affixed to or on one leg A, into or with which said
guide the other leg takes or engages. If desired, a guide may be fixed on each
leg, but we prefer to use a double guide fixed on one leg as shewn in Figure 3, 80
that it forms a bearing for the other leg whether the device is rotated or partially
rotated to the right or to the left hand. A metal or other shield may be provided
to fit over the cutting blades and legs of the scraper when not in use.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
--
An implement for scraping the interior of tobacco pipe bowls consisting of a
spring fork, on the outside of the legs of which are fixed or formed cutting blades
which taper inwards towards the bottom substantially as and for the purpose
herein described and illustrated in the accompanying drawings.
Dated this 4th day of May 1893
F. W. GOLBY,
36, Chancery Lane, London, W.C., Patent Agent for the Applicants.