CERTAIN ECONO- MICAL BOILERS FOR SUNDRY USEFUL PURPOSES
Year: 1799

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ROBERT
DELAP, of Banville, near Banbridge, in the Kingdom of Ireland, :send
greeting.
2.
WHEREAS. His present Majesty King George the Third hath, by "his
Royal Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Sixth day of April, been graciously pleased to give and
grant
unto me, the said Robert Delap, my executors, administrators, and assigns,
His especial licence, full power, sole privilege and authority, to make, use,
exercise, and vend, for and during the term of years. therein mentioned, within
England, Wales, and the Town of Berwick upon Tweed, and also in all His
Majesty's Colonies and Plantations abroad, my Invention of "CERTAIN ECONO-
MICAL BOILERS FOR SUNDRY USEFUL PURPOSES;" in which said Letters Patent
there is contained a proviso obliging me, the said Robert Delap, to particularly
describe and ascertain the nature of my said Invention, and in what manner
the same is to be performed, by an instrument in writing my hand and
seal, and cause the same to be inrolled in His said Majesty's High Court of
Chancery within six calendar months after the date of the said recited Letters
Patent, otherwise the said Letters Patent, and all liberties and advantages
thereby granted, should utterly cease, determine, and be void, as in any by the
said Letters Patent, reference being thereunto had; will more fully and at large
appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
Robert Delap, do hereby disclose, discover, and describe my said Inventions.by
the above Plains or Drawings, and the descriptions thereof hereunder written,
that is to say:-
I call my boilers oeconomical, because the fuel necessarily consumed in
the various operations of our manufactures is made at the same time to com-
municate sufficient heat to them, not merely by continuing the flues under
and around them (as is common after the fire has performed its usual busi-
ness), but direct and immediate in the first instance, in addition to those
advantages. All the improvements hitherto made in respect to boilers consist
in a particular construction of the fire-place and flues with a view to save fuel;
but yet they must all have fire applied exclusively to themselves to enable them to
perform their work, and there is still an equal (if not greater) heat wasted upon
the flues and surrounding work. The peculiar principle of my Invention is that
that I avail myself of this hitherto wasted heat, and with it work my boilers, by
placing them in the situation of these flues and other work, and also in forming
them so as to surround all fires, whether applied to other boilers or any other
purpose, so that I may venture to say these boilers consume no fuel, and yet
work as well and are as applicable to every useful purpose as any other boilers.
Those who use fire for boilers of any description or for other purposes may, with
the same fuel they now consume, have a steam (or other) boiler on this prin-
ciple and construction, which will work a steam engine or perform other pro-
cesses as well as any boiler whatever. Those who have steam engines already by
adopting these boilers may, with the same fire they now use, work their engines
and other boilers or perform any other process to which fire is necessary; a few
examples of their application this way I shall give by the above Drawings and
explanations, which will be sufficient to shew their principle and construction,
and that the enormous expence of fuel to work steam engines will be entirely
saved to bleachers, brewers, distillers, sugar refiners, dyers, &c. &c. &c.,
and not only to them but to any one who uses fire for other purposes. They
may also be used with equal advantage as open boilers. Fig. 1, 2, 2 a, A, A, A,
sections of common boilers, such as are used for boiling cloth, brewing, &c.
&c. &c.; B, B, B, B, B, B, sections of economical boilers, surrounding the
common ones in such manner as to receive the full benefit of the fire in the
first instance (their form may be varied to suit the situation) without in the
least diminishing the heat usually applied to the common boilers, and thus
without any additional fuel on their account. They will produce steam of
sufficient strength, to work any steam engine. Any common boiler may be
converted into a steam boiler by adding a cover, the boiler doing its usual work

page_text: at the same time. The' boiler and cover are connected or detached expédi-
ously, as occasion requires, by the contrivance. Fig. 3, an iron stirrup, screw,
and strap, with an hinge at C. The strap is screwed fast to the side of the
boiler. The stirrup is turned up over a projecting point in the cover on which
it is screwed down; there must be such number of these as will confine the
steam. Or Fig. 4, an hinged strap, with the screw falling into the groove of a
metal rim round the cover, instead of the above points; D, D, D, Fig. 1, 2, 2a,
the fire-places, communicating in the first instance equal heat to the economical
as to the common boilers; E, E, E, the ash pit, with registers; F; F, F, F, F,
F, F, F, F, F, the winding flues passing under and encircling (or in metal pipes
through) the economical boiler. G, G,G, pipes to convey the steam to the engine,
as usual. Fig. 5, 6, the ground plan of these flues; their course is shewn by the
unshaded part; the shaded parts shew the brick-work between and round:
these flues; the inner dotted circles on these flues shews the ground plan of the
common boilers. The outter dotted circles shew that of the economical boilers.
Should it be necessary for any one to have a larger steam engine than could be
worked by the fire he has occasion for in his usual processes, he may (with à
very small addition of fuel) obtain his object by having his flues constructed
as in Fig. 7, and putting small fires in the grates H, H. When these boilers
are used to work steam engines. (as in the foregoing instances), the steani
ought to issue at all times with equal force, for which purpose the regu
lator, Fig. 8, is added to the steam pipe. 1, the beam; 2, a cylinder open
at top, but close at bottom (except the small tube which connects it with the
main steam pipe); in the cylinder is a piston well packed; 3, a sliding valve, or
cock, &c.; 4, 5, two weights to be used as occasion requires. It operates thus :-
When steam in equilibrium with the atmosphere is wanted, both weights
4 and 5 are taken off; the beam is then a true balance, having the piston
valve, &c. attached to it. The engine is set to work by pushing down the
valve or turning the cock, &c. which opens the steam passage; the piston is
at the same time brought near to the bottom of the cylinder; they will
remain in this state while the steam is in equilibrium with the atmosphere;
but the instant it becomes stronger the piston is raised, and with it the valve or
cock, &c., and thereby the steam passage is contracted, and thus the equilibrium
will be restored, of course an equal motion in the machinery preserved. If a
stronger steam than the atmosphere is wanted, the weight 4 is put on, and the
weight 5 off. If the reverse, the weight 5 is put on, and the weight 4 off. The
valve or cock, &c. must be placed between the boiler and this cylinder.
Another piece of economy effected by these boilers (when used for the produc-
tion of steam) is saving of labour by the simple contrivance represented. Fig. 9,

page_text: G, the main steam pipe (as described before), in which is an axis with a spiral
flanche filling the pipe. The end of this axis passes through the bend of the
pipe, and is there made steam-tight.. .On this end a pinion or pully, &c. is
put, which will work a shaft by a cog wheel or pulley, &c., and this may be
applied to stir any ingredients in the common boiler to work a pump or any
other thing it is found equal to instead of manual labour, and the steam, after
performing this, will work a steam engine. Fig. 10 is another contrivance for
the same purpose. The steam pipe is here dropped perpendicular within the
boiler, to which are attached one, two, or more horizontal hollow arms';; in the
ends of these arms are placed the above-described axis with spiral flanches;
the pinions acting upon a horizontal circle of cogs which is made fast. to
the inside of the boiler. An inspection of the Figure will shew its operation
fully.
In witness whereof, I, the said Robert Delap, have hereunto set my hand
and seal, this Eighth day of April, in the year of our Lord One
thousand seven hundred and ninety-nine.
ROBERT DELAP. (L.S.)
AND BE IT REMEMBERED, that on the same Eighth day of April,
in the year above mentioned, the aforesaid Robert Delap came before our
Lord the King in His Chancery, and acknowledged the Specification aforesaid,
and all and everything therein contained, in form above written. And also
the Specification aforesaid was stamped according to the tenor of the Statute
in that case made and provided.
Inrolled the Thirtieth day of July, in the year above written..