IMPROVE- MENTS IN APPARATUS USED IN THE MANUFACTURE OF GAS
Year: 1878

page_text: LETTERS PATENT to Thomas Nesham Kirkham, of 21, Abingdon Street,
Westminster, Gas Engineer, and Samuel Chandler, of 104, Newington Cause-
way, in the County of Surrey, Gas Engineer, for the Invention of " IMPROVE-
MENTS IN APPARATUS USED IN THE MANUFACTURE OF GAS."
COMPLETE SPECIFICATION filed by the said Thomas Nesham Kirkham and
Samuel Chandler at the Office of the Commissioners of Patents on the 28th
March 1878.
THOMAS NESHAM Kirkham, of 21, Abingdon Street, Westminster, Gas Engineer,
and SAMUEL CHANDLER, of 104, Newington Causeway, in the County of Surrey,
Gas Engineer. "IMPROVEMENTS IN APPARATUS USED IN THE MANUFACTURE OF
GAS."
This Invention has for its object improvements in apparatus used in the manu-
facture of gas, and relates to that portion known as the dip pipe.
In the manufacture of gas it is desirable to avoid as much as possible any
pressure being exerted upon the retorts; and the present Invention is to meet
such requirement in an improved and more simple manner than has heretofore
been employed.
To the upper end of the dip pipe we attach a projection piece, which is truly
turned or faced either cone shaped or flat. The casting into which this is to fit is
also turned, in order that when the two are close together a perfect sound joint is
the result. At the upper end of the dip pipe we have a cross bar, to which is
attached a rod for lifting and lowering the dip pipe. To this rod a screw is fixed,
which passes through a flange terminating with the handle for using the apparatus.

page_text: Reference to the Drawings which accompany this Specification will make the
Invention better understood.
Figure 1 is a section of the apparatus.
The letter A indicates the dip pipe.
B is the upper part, which is truly faced.
C, the casting, into which B fits, which is likewise truly turned.
D, the rod and screw for actuating the dip pipe.
E, the screwed flange.
Figure 2 is a plan of dip pipe showing cross bar.
The action of the apparatus is as follows:-The gas would enter by a suitable
pipe, as indicated by the arrow F, and descend through the dip pipe into the
hydraulic main. As soon as the retort is charged and the lid secured the dip pipe
is then lifted out of the liquid in the hydraulic main, and the gas has a free
unobstructed passage. As soon however as the charge in the retort is expended,
and before the lid is removed, the dip pipe is lowered, and becomes immersed in
the liquid, while at the same time the faced joints come into contact, thus forming
a perfect shut off between the hydraulic main and the retort out of action.
Having described our Invention, and the manner in which it is applied, we wish
to state that we do not confine ourselves to the exact details herein-before described,
as the same may be varied without departing from the nature of our Invention,
but what we claim is the 'dip pipe, substantially as herein-before described and
represented in the accompanying Drawings.
In witness whereof, we, the said Thomas Nesham Kirkham and Samuel
Chandler, have hereunto set our hands and seals, this Twenty-eighth day
of March, in the year of our Lord One thousand eight hundred and seventy-
T. N. KIRKHAM.
(L.S.)
SAM'. CHANDLER. (L.S.)