IMPROVEMENTS IN APPARATUS FOR UTILISING THE WAGTE HEAT FROM STEAM BOILERS' AND OTHER FURNACES
Year: 1874

page_text: LETTERS PATENT to Sam Mason, junior, of Manchester, and Michael
Alcock, of Pendleton, both in the County of Lancaster, Engineers,
for the Invention of "IMPROVEMENTS IN APPARATUS FOR UTILISING THE
WAGTE HEAT FROM STEAM BOILERS' AND OTHER FURNACES.”
Sealed the 10th July 1874, and dated the 24th April 1874.
PROVISIONAL SPECIFICATION left by the said Sam Mason and Michael
Alcock at the Office of the Commissioners of Patents, with their
Petition, on the 24th April 1874.
We, SAM MASON, junior, of Manchester, and MICHAEL ALCOCK, of
Pendleton, both in the County of Lancaster, Engineers, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN APPA-
RATUS FOR UTILISING THE WASTE HEAT FROM 'STEAM BOILERS' AND OTHER
FURNACES," to be as follows:-
Our improved apparatus consists of one or more series of pipes placed
by preference horizontally in the upper part of the flue leading from
the furnace to the chimney, or in a chamber connected therewith, bút

page_text: which may be placed vertically or diagonally. The said pipes are
parallel to each other, the ends being connected by semicircular or other
connections. The parallel parts of the pipes are kept free from soot by
means of weighted scrapers, which are traversed to and fro by screws,
cranks, and levers, or other equivalents.
Another part of our Invention consists in the mode of connecting
together the various parts of the series of pipes.. The semicircular
connexions are made with sockets fitting on the ends of the parallel
pipes, and these connections are tied together by stay rods. The parallel
pipes are made of cast or wrought iron, or other metal.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Sam Mason and Michael Alcock in the Great Seal
Patent Office on the 22nd October 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, SAM
MASON, junior, of Manchester, and MICHAEL ALCOOK, of Pendleton, both
in the County of Lancaster, Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fourth day of April, in the year
of our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did for Herself, Her, heirs and successors,.
give and grant unto us, the said Sam Mason, junior, and Michael
Alcock, Her special licence that we, the said Sam Mason, junior, and
Michael Alcock, our executors, administrators, and assigns, or such
others as we, the said Sam Mason, junior, and Michael Alcock, our
exccutors, administrators, and assigns, should at any time agree with, and
no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
APPARATUS FOR UTILIZING THE WASTE HEAT FROM "STEAM BOILERS" AND
OTHER FURNACES,” upon the condition (amongst others) that we, the said

page_text: Sam Mason, junior, and Michael Alcock, our executors or admini-
strators, by an instrument in writing under our, or their, or one of
our or their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the saine was
to be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that we, the said Sam Mason, junior, and Michael
Alcock, do hereby declare the nature of our said 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):
The
. Our improved apparatus consists of one or more series of pipes placed
by preference horizontally in the upper part of the flue leading from
the furnace to the chimney, or in a chamber connected therewith.
said pipes are parallel to each other, the ends being connected by semi-
circular or other connections. The parallel parts of the pipes are kept
free from soot by means of weighted scrapers which are traversed to and
fro by screws, cranks, and levers, or other equivalents.
Another part of our Invention consists in the mode of connecting
together the various parts of the series of pipes. The semicircular
or end connections are made with two sockets fitting on the ends of the
parallel pipes, and these connections are tied together by stay rods.
The parallel pipes are made of cast or wrought iron, or other metal.
h
The water when heated by circulating through the series of pipes may
be used for feeding steam boilers, or for other purposes.
And in order that our Invention may be fully understood and readily
carried into operation, we will proceed to describe the accompanying
two Sheets of Drawings, reference being had to the figures and letters
marked thereon.
On Sheet 1 Fig. 1 is a transverse section; Fig. 2, a longitudinal
section; and Fig. 3, a plan of our improved apparatus; Fig. 4 is a
detached view of part of the same.
a is part of a flue connected to a steam boiler or other furnace, or a
chamber in communication with such a flue; and b, b, are two scrips
of pipes placed horizontally in the upper part of the said flue or
chamber; the object of placing the pipes in this position is to derive

page_text: the greatest advantage from the heated products of combustion which
in escaping from the. furnace rise to the upper part of the flue. The
pipes 6 are made of drawn metal tubes, the ends fitting into the sockets
c, c, which are connected together by the stay or tic rods d, d. The
pipes 6 are kept free from soot by the weighted scrapers e, e, shewn
detached in Fig. 4, which are supported on the shafts f, f, and these
shafts are supported by the uprights g, g, each of which is made of two
pieces of plate iron connected above to the rack h, and below by a
bridle. These uprights pass through transverse slots in the cast-iron
plate a forming the cover of the flue or chamber a, and the racks h
are guided by projections cast or fixed to the said cover; by this means
the heated air is kept in and the cold air kept out of the flue or
chamber a. The number of racks will depend upon the number of
pipes employed, and they are moved to and fro to traverse the scrapers
over the pipes by means of the shaft on which are the pinions
gearing into the racks h. The direction of motion of the shaft i is
reversed at intervals by a sliding clutch box on the cross shaft ; which
is brought alternately into gear with clutches on the mitre wheels j',
both of which gear into the wheel on the shaft i. The sliding clutch
box is moved to and fro by the tumbler lever k, or other equivalent
in the ordinary manner. The scrapers e are held against the under side
of the pipes 6 by the preponderating weights e¹, and the top of the
pipes is scraped by the cap fitting on the forked end of the scrapers.
By making the distance between the scrapers equal to half the length
of the pipes b, it is evident that the whole length of pipe can be
scraped by moving the scrapers to and fro half the length of tho
pipe.
'
The water to be heated by the apparatus above described is supposed
to enter at the left-hand end of the upper series of pipes 6, as shewn
in Fig. 3, and after circulating through these pipes it is conveyed
into the lower series of pipes through which it circulates back in the
same manner, and. when heated the water may be pumped into the
boiler, or otherwise disposed of; by this means the waste heat is
utilised.
On Sheet 2 Fig. 5 represents a modification of our Invention; in this
arrangement only one series of pipes is shewn, and the scrapers e are
traversed to and fro along them by the pinions on the side shaft i;
these pinions gear into racks h, the rods of which pass through holes

page_text: in the sides of the flue or chamber a, and to these rods are fixed
bearings for the shaft ƒ on which the scrapers e are hinged. The
bearings of the shaft f slide on the rails ¹ fixed in the sides of the
flue.
Fig. 6 is another modification of our Invention; in this case the
scrapers e are traversed to and fro by means of the endless chains k
which are connected to the bearings of the shaft f, and which pass
around toothed pulleys on the side shaft i and over guide pulleys k¹.
Figs. 7 and 8 are an clevation and plan of another modification of
our Invention; in these views the scrapers e are traversed to and fro
by means of the screws which are turned round by the side shaft i
and bevel gears shewn in Fig. 7. The pipes 6 are made of cast iron with
semicircular ends, and they are jointed together by flanges at one end,
as shewn, or in any other convenient manner.
Having thus described the nature of our Invention, and several modos
of performing the same, we wish it to be understood that we do not
intend to limit ourselves to the details given, as the same may be varied
or modified; we claim,-
First. Placing pipes for heating water in the upper part of the fluc,
or of a chamber in communication with a flue, for the purpose described.
Secondly. The improved modes of connecting together pipes for
heating water, as shewn and described.
And lastly. The improved modes of constructing the scrapers for
cleaning the heating pipes, as shewn and described.
In witness whereof, we, the said Sam Mason, junior, and Michacl
Alcock, have hereto set our hands and seals, this Twenty-first
day of October One thousand eight hundred and seventy-
four