Year: 1836

page_text: LONDON:
PRINTED BY GEORGE E. EYRE AND WILLIAM SPOTTISWOODE
PRINTERS TO THE QUEEN'S MOST EXCELLENT MAJESTY:
PUBLISHED AT THE GREAT SEAL PATENT OFFICE,
25, SOUTHAMPTON BUILDINGS, HOLBORN.

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, SAMUEL
BROWN, of Boswell Court, Carey Street, in the County of Middlesex, Engineer,
send greeting.
WHEREAS His present most Excellent Majesty King William the Fourth,
by His Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Fourteenth day of July, in the sixth year of His reign, did,
for Himself, His heirs and successors, give and grant unto me, the said
Samuel Brown, His especial licence, full power, sole privilege and authority,
that I, the said Samuel Brown, my exors, adññiors, and assigns, or such others
as I, the said Samuel Brown, my exors, adñiors, or assigns, should at any time
agree with, and no others, from time to time and at all times during the term
of years therein expressed, should and lawfully might make, use, exercise, and
vend, within England, Wales, and the Town of Berwick-upon-Tweed, my
Invention of "CERTAIN IMPROVEMENTS FOR GENERATING GAS, WHICH IMPROVE-
MENTS ARE ALSO APPLICABLE TO OTHER USEFUL PURPOSES;" in which said Letters
Patent is contained a proviso that I, the said Samuel Brown, shall cause
a particular description of the nature of my said Invention, and in what
manner the same is to be performed, to be inrolled in His said Majesty's
High Court of Chancery within six calendar months next and immediately after
the date of the said in part recited Letters Patent, as in and by the same,
referenco being thereunto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Samuel Brown, do hereby declare that the nature of my said Invention, and
the manner in which the same is to be performed, are fully described and
ascertained in and by the following description thereof, reference being had to
the Drawing thereunto annexed, and to the figures and letters marked thereon,
that is to say

page_text: According to the ordinary means now employed for generating gas the
retorts or ovens are quickly burnt out at that portion thereof which is
directly acted on by the fire, and from this cause the retort requires to be
taken down, and to be either repaired or replaced; and such is the case in
various other retorts, ovens, or vessels, which are subject to considerable heat.
Now the object of my Invention is, the constructing and application of fusible
metallic or other joints, which, so long as the retorts, ovens, or vessels in
which materials are distilled for generating gas shall, by means of water or
other fluid applied as herenfter described, form a solid junction of parts of the
retorts, ovens, or vessels, but when the lower part of the retort, oven, or
vessel has become injured by the action of the fire, the metallic or other
joint will readily become fluid, as hereafter described, when the parts may be
separated, and the injured bottom or lower part removed, and another substi-
tuted with great facility, when the metallic or other joint will again become
solid and secure by means of water or other fluid circulating in contact with
the metal groove which contains the fusible metal or other composition
constituting the joint.
Having thus generally stated the nature of of my Invention, I will proceed
to describe the best manner I am acquainted with for carrying the same
into effect.
DESCRIPTION OF THE DRAWING.
Figure 1 is a transverse section, Figure 2 is a plan of part of the appa-
ratus, and Figure 3 is a longitudinal section. a is the upper part of a gas
retort, and 6 the bottom thereof; and it will be seen that the sides of cach
part enter into a groove or channel formed in the hollow frame c, which
hollow frame is of wrought iron or other suitable material, and is formed of
such-figure-as-tho-apparatus, oven, or-vessel-may-require,-as-will readily-be-
understood by the Figures in the Drawing. Into the groove d of the hollow
frame c is to be placed a composition of lead, tin, and bismuth, which will melt
at a temperature somewhat above two hundred and twelve degrees, and the
degree at which such compound of metal will melt depends on the relative
proportions of the above-mentioned metals, as is well known; and I would
have it understood that such compounds have been used for various purposes,
I therefore make no claim thereto, nor do I confine myself to the use of those
materials, though they are the best I am acquainted with for the purpose.
e is a tube or pipe by which water flows from any convenient reservoir, and
f is a pipe by which the water may pass off as it becomes heated, for if under
pressure the water would become too hot, and melt the fusible mixture,
whereas the object of the water is to take off the heat from the metallic

page_text: joint at d, d, and keep its temperature below the melting point of the mixture.
And I would remark, that if from circumstances the water in the hollow
frame c is kept under pressure, then the fusible mixture must be so pro-
portioned that its melting point is beyond the degree of heat at which the
water would constantly be kept when the retort, oven, or vessel is being used.
And I would also state, that although I have recommended water as the circu-
culating medium for carrying off heat from the fusible metallic joint d, because
it is the cheapest material, and so far as my experience goes is the best under
every circumstance, but I do not confine myself thereto for the purposes of
of my
Invention, which consists in keeping a fusible metal or other joint solid by
means of a fluid carrying off the heat during the time that the retort, oven, or
vessel is at work.
b
Having thus described the nature of my Invention, I will suppose that the
bottom 6 of the retort, oven, or vessel has been burned out, and it is desired to
remove the same, then the water or fluid used for keeping fusible joint solid is
to be drawn off, by which means that joint will quickly become fluid, and the
part 6 be removed, and a fresh one substituted, when the water or other fluid
for conducting off the heat is again to be permitted to flow into the vessel or
hollow frame c, and the joint will become solid and secure, notwithstanding
the heat be very intense which is applied to the part b. By the application of
this Invention it will be evident that much expense and loss of time will be
saved in generating gas, and in various other processes where vessels are
subject to heat, by which part thereof become destroyed and require to be
renewed.
In witness whereof, I, the said Samuel Brown, have hereunto set my
hand and scal, this Fourteenth day of January, in the year of our
Lord One thousand eight hundred andAL