IMPROVEMENTS IN INSULATORS FOR INSULATING PROVISIONAL SPECIFICATION
Year: 1853

page_text: LETTERS PATENT to Richard Green, of the firm of Davis, Greathead, and
Green, of the Flint Glass Works, Brettell Lane, in the County of
Stafford, for the Invention of "IMPROVEMENTS IN INSULATORS FOR INSULATING
PROVISIONAL SPECIFICATION left by the said Richard Green at the
Office of the Commissioners of Patents, with his Petition, on the 28th
December 1853.
I, RICHARD GREEN, of the firm of Davis, Greathead, and Green, of the
Flint Glass Works, Brettell Lane, in the County of Stafford, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN INSULATORS FOR INSULA-
TING THE WIRES OB RODS EMPLOYED FOR CONDUCTING OR TRANSMITTING ELECTRICITY"
to be as follows:-
The peculiar feature of this Invention consists in forming insulators with a
screw for connecting the same to a post or other part to which the insulator is
to be fixed, for supporting or maintaining such said wires or rods in proper
position. I would remark, that I am aware of insulators having already been
made of glass cast around a metal screw employed for connecting the insulator
to a post. This Invention does not, therefore, consists in forming insulators
with a screw for the aforesaid purpose, but has for its object the dispensing of
the use of metal in the construction of insulators by forming the screw of the

page_text: insulator of the same material as the other part thereof; that is to say, if
formed of glass, then the insulator is wholly of glass; if of porcelain, then the
screw and other part of the insulator is formed wholly of porcelain, or of
whatever other suitable material the insulator may require to be formed of.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Green in the Great Seal Patent Office on the 28th
June 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
GREEN, of the firm of Davis, Greathead, and Green, of the Flint Glass Works,
Brettell Lane, in the County of Stafford, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-eighth day of December, in the year of our
Lord One thousand eight hundred and fifty-three, in the seventeenth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Richard Green, Her special licence that I, the said Richard Green,
my executors, administrators, and assigns, or such others as I, the said Richard
Green, my executors, 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 INSULATORS FOR
INSULATING THE WIRES OR RODS EMPLOYED FOR CONDUCTING OR TRANSMITTING
ELECTRICITY," upon the condition (amongst others) that I, the said Richard
Green, by an instrument in writing under my hand and seal, should par-
ticularly describe and ascertain the nature of the said Invention, and in what
manner the same 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 I, the said Richard Green, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement thereof (that is to say):-
My Invention consists in a new mode of constructing insulators of glass or
porcelain, and the principal feature of novelty is the forming of such said
insulators entirely of glass or porcelain, and with a screw of the same material,
for connecting the insulator to a post, to brickwork, or to any other place to

page_text: which the insulator is to be fixed, for supporting and maintaining the electric
wires or rods in proper position; and I would here remark, that I am aware
of glass insulators having already been made and used on railways, in which
the cap and stem of the insulator are of one and the same piece of glass, but
the screw of such insulators has invariably been made of iron or other metal;
the objection to which is, that the expansion of the metal has been found to
break the glass which surrounds it, thereby rendering insulators thus con-
structed entirely useless. And the object and intention of my said Invention
is to obviate the above objection by constructing the screw, the cap, and the
stem of the insulator of one homogenous mass of glass or porcelain, instead
of forming the insulator in separate pieces, as heretofore practised. But in
order to explain my said Invention as completely as possible, I now proceed
to describe the best means I am acquainted with for carrying the same into
practical effect.
MODE OF CONSTRUCTION.
I take a mould of the desired shape of the insulator complete, that is, with
the stem, the cap, and the screw (for fixing it) shaped in one piece, and into this
mould I pour the molten glass in the manner usually practised by glass makers
of casting glass, observing, in conclusion, that I do not claim as my Invention
of improvements in insulators, any new mode of casting insulators in glass;
but what I claim is, forming the several parts of insulators (namely, the enp,
the stem, and the screw) of one entire piece of glass or porcelain, instead of
forming the same in separate parts or pieces composed of iron or other metal
combined with glass or porcelain, as heretofore practised. And I claim more
particularly the forming of the screw of the insulator of the same material as
the other part thereof, as herein-before particularly described and set forth.
In witness whereof, I, the said Richard Green, have hereunto set my
hand and seal, this Twenty-sixth day of June, in the year of our
Lord One thousand eight hundred and fifty-four.
Witness,
JOHN WOOD,
Brettell Lane,
n' Stourbridge.
RICHARD GREEN. (L.8.)