Year: 1877

page_text: We, the Company carrying on business as KIRKHAM, HULETT and CHANDLER
Limited, of Palace Chambers, Bridge Street, Westminster, seek leave to amend the .
Specification and Drawings of Letters Patent No 1814, of 1877 as shewn in red
ink in the copy of the original Specification hereunto annexed and marked with
the letter A,
Our reasons for making this amendment are as follows:-
The Specification describes and claims more than, having regard to the state of
knowledge at the date of the Patent, the Patentees were entitled to claim as their
invention. The description and drawings also require slight corrections to be
made in order that the invention may be more clearly explained.
Dated the 15th February 1884.
G. F. REDFERN,
Agent for the Patentees.

page_text: In the matter of Letters Patent granted to Thomas Nesham Kirkham, David
Hulett Samuel Chandler, senior & Josiah Chandler for the invention of "Improve-
ments in apparatus for the purification of gas" dated the 10th of May 1877
N° 1814.
In the matter of the Oppositions of Messrs Laycock and Clapham, Box and
Waller and C & W Walker, respectively thereto.
I allow the whole of the amendments proposed to be made in the descriptive
part of the said Specification, with the exception of the substitution of the word
"should" for "will" on line 7 page 2, and I also allow the Drawings to be lettered
as proposed.
I refuse to allow the amendment of the claim as proposed in line 21, on page 2,
as in my opinion such amendment would (if allowed) make the Specification claim
an invention substantially larger than or substantially different from the invention
claimed by the original Specification.

page_text: LETTERS PATENT to Thomas Nesham Kirkham, of 21, Abingdon Street,
Westminster, C.E., David Hulett, of 55 and 56, High Holborn, in the County
of Middlesex, Gas Engineer, and Samuel Chandler, senior, and Josiah Chandler,
of 104, Newington Causeway, in the County of Surrey, Gas Engineers, for the
Invention of "IMPROVEMENTS IN APPARATUS FOR THE PURIFICATION OF GAS."
Sealed the 3rd July 1877, and dated the 10th May 1877.
COMPLETE SPECIFICATION filed by the said Thomas Nesham Kirkham, David
Hulett, Samuel Chandler, and Josiah Chandler at the Office of the Commissioners
of Patents on the 10th May 1877.
THOMAS NESHAM KIRKHAM, of 21, Abingdon Street, Westminster, Civil Engineer,
DAVID HULETT, of 55 and 56, High Holborn, in the County of Middlesex, Gas
Engineer, and SAMUEL CHANDLER, senior, and JOSIAH CHANDLER, of 104, Newington
Causeway, in the County of Surrey, Gas Engineers. "IMPROVEMENTS IN APPARA-
TUS FOR THE PURIFICATION OF GAS."
This Invention has for its object improvements in apparatus for the purification
of gas, and relates more particularly to "washing or scrubbing," and is an improve-
ment upon the Invention for which Letters Patent were granted to Thomas Nesham
Kirkham, David Hulett, Samuel Chandler, and Josiah Chandler, dated 1st February
1877, No. 422.
In the Letters Patent herein referred to ways and means are shewn whereby a
large amount of wetted surface is obtained for the extraction of impurities con-
tained in the gas, and our present Invention is an improved manner of obtaining
wetted surfaces for the purposes herein referred to, and as hereafter described and
shewn by the accompanying Drawings.
A at Figure 1 is a longitudinal section of apparatus in plan; B is an outer vessel;
) C are thin sheets of iron (or other suitable material) placed to meet the gas edgewise
side by side, and leaving spaces between for the gas to pass through; these will be
understood by reference to the letter D at Figure 2, which is a longitudinal
elevation. E represents the outer vessel which is charged with water or other
liquid, and the action of the apparatus is as follows:-The thin sheets D are placed
upon a shaft or shafts, and are operated upon by suitable gearing marked F,

page_text: Figure 1, and the vessel being charged with water or other purifying fluid to the
required height the surfaces become wetted as they revolve, and thus are presented
to the crude gas which becomes purified by passing through the spaces which are
indicated by the small arrows on Figure 1.
The machines may be constructed with one or more sets of plates or drums to be
hereafter described; it is however to be noted that when more than one set is used
in one vessel each set will work in a separate compartment and made separate by
means of division plates in order to have various strength liquors, the division
plates being placed at different heights so as to cause the liquor to overflow from
one compartment to another; the gas would enter at G, Figure 2, and pass through
the apparatus, leaving at H. I. are louvres. which form part of the other Invention
mentioned previously; J are outlets for liquor; K, Figure 3, is end elevation in
section on line L.
The drums alluded to above may be constructed of wire or other open work, and
are filled with scrap iron or other suitable material, being attached to the shaft, and
operated upon in the manner before described.
Having described our Invention, and the manner in which the same is carried
into effect, we are desirous to make it understood 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 said Invention; but what we do claim as novel
and therefore as our Invention is obtaining surfaces and forming spaces for the
purification of gas, as described and set forth.
In witness whereof, we, the said Thomas Nesham Kirkham, David Hulett,
Samuel Chandler, senior, and Josiah Chandler, have hereunto set our hands
and scals, this Tenth day of May, in the year of our Lord One thousand
eight hundred and seventy-seven
T. N. KIRKHAM.
(L.S.)
D. HULETT.
.(L.S.)
S. CHANDLER.
(L.S.)
JOSIAH CHANDLER. (L.S.)
T. N. KIRKHAM,
(L.S.)
D. HULETT.
(LS)
S. CHANDLER.
(L.S.)
JOSIAH CHANDLER. (L.S.)

page_text: LETTERS PATENT to Thomas Nesham Kirkham of 21 Abingdon Street
Westminster C E. David Hulett of 55 and 56 High Holborn in the County
of Middlesex Gas Engineer and Samuel Chandler Senior and Josiah Chandler
of 104 Newington Causeway in the County of Surrey Gas Engineers for an
. Invention of "IMPROVEMENTS IN APPARATUS FOR THE PURIFICATION OF GAS"
COMPLETE SPECIFICATION filed by the said Thomas Nesham Kirkham, David
Hulett, Samuel Chandler, Senior, and Josiah Chandler at the Office of the
(. Commissioners of Patents on the 10th May 1877.
THOMAS NESHAM KIRKHAM of 21 Abingdon Street Westminster, Civil Engineer,
DAVID HULETT of 55 and 56 High Holborn in the County of Middlesex Gas
Engineer and SAMUEL CHANDLER, Senior, and JOSIAH CHANDLER of 104 Newington
Causeway in the County of Surrey, Gas Engineers "IMPROVEMENTS IN APPARA-
TUS FOR THE PURIFICATION OF GAS
"
This Invention has for its object Improvements in apparatus for the purification
of gas and relates more particularly to "washing or scrubbing" and is an Improve-
ment upon the Invention for which Letters Patent were granted to Thomas Nesham
Kirkham, David Hulett, Samuel Chandler Junior and Josiah Chandler dated
1 February 1877. N° 422.
In the Letters Patent herein referred to ways and means are shewn whereby a
large amount of wetted surface is obtained for the extraction of impurities con-
tained in the gas and our present invention is an improved manner of obtaining
wetted surfaces for the purposes herein referred to and as hereafter described and
shewn by the accompanying Drawings.
A-at Figure 1 is a horizontal longitudinal section of the apparatus in-plan; B is
an outer vessel; C C are thin sheets of iron (or other suitable material) placed to
meet the gas edgeways side by side, and-leaving spaces being left between them for
the gas to pass through-these plates will be fully understood by reference to the
letter Cat Figure 2 which is a longitudinal section of the apparatus; elevation.
BE represents the outer vessel which is charged with water or other liquid, and
the action of the apparatus is as follows:-The thin sheets DC are placed upon a
shaft or shafts and are operated upon by suitable gearing marked F, Figure 1 and
the vessel being charged with water or other purifying fluid to the required height
the surfaces become wetted as they revolve and thus are presented to the crude
gas which becomes purified by passing through the spaces which are indicated by
the small arrows on Figure 1.
The machines may be constructed with as many one-or-more sets of plates C as
may be required; or-drums-to-be-hereafter-deseribed-it is however to be noted that
when more than one-set-is-used-in-one vessel each set will work in a separate
compartiment and be made separate by means of division plates D in order to have

page_text: liquors of various strengths, liquors the division plates D being placed at different
heights so as to cause the liquor to overflow from one compartment to another-the
gas would enter at G Figure 2 and pass through the apparatus in the direction shewn
by the arrows and leave leaving at H. I are louvres which are referred to in the
Specification of patent N° 422 form-part-of-the-other-invention mentioned previously
and rotated by the gearing E. J are outlets for drawing off liquors when required;
liquor. K Figure 3 is end-elevation in a section on line L. L of figures 1 and 2.
Instead of sets of plates as above named we sometimes employ The drums
alluded-to-above-may-be constructed of wire or other open work and are filled
with scrap iron or other suitable material being attached to the shaft and operated
upon in the manner before described.
Having described our invention and the manner in which the same is carried
into effect we are desirous to make it understood that we do not confine ourselves
'to the exact details hereinbefore described as the same may be varied without
departing from the nature of our said invention but what we do claim as novel
and therefore as our Invention is obtaining surfaces and forming spaces for the
purification of gas as described and set forth.
In witness whereof we the said Thomas Nesham Kirkham, David Hulett,
Samuel Chandler, Senior, and Josiah Chandler have hereunto set our hands and
seals this tenth day of May in the year of our Lord One thousand eight
hundred and seventy seven.
T N KIRKHAM
D HULETT
S CHANDLER.
(L.S.)
(L.S.)
. (L.S.)
JOSIAH CHANDLER (L.S.)