IMPROVEMENTS IN INSULATORS FOR ELECTRIC TELEGRAPH PURPOSES
Year: 1860

page_text: LETTERS PATENT to Robert Nicol Reid, of University Street, in the
County of Middlesex, Engineer, for the Invention of "IMPROVEMENTS IN
INSULATORS FOR ELECTRIC TELEGRAPH PURPOSES."
Sealed the 28th December 1860, and dated the 3rd July 1860.
PROVISIONAL SPECIFICATION left by the said Robert Nicol Reid at
the Office of the Commissioners of Patents, with his Petition, on the
3rd July 1860.
I, ROBERT NICHOL REID, of University Street, in the County of Middlesex,
Engineer, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN INSULATORS FOR ELECTRIC TELEGRAPH PURPOSES," to be as follows:-
My Invention relates to insulators for supporting telegraph wires, such
insulators being made of glass, porcelain, china, earthenware, or stone, and
consists of a peculiar manner of fixing the bolt or fastening into such insulators,
which are in ordinary subject to fracture by reason of the expansion and con-
traction of the insulator on a hard substance, such bolts or fastenings being
usually secured therein by cement. I am aware it has been proposed to
employ a yielding substance to bind these bolts in the insulators, which,
although of a sufficiently yielding nature as possibly to prevent fracture, have
not been sufficiently resilient to maintain the requisite hold between the insu-
lator and the bolt. Now my Invention consists in applying a thickness of india-
rubber around the neck and head of the bolt inserted in the insulator, and

page_text: around this I fill in suitable cement, by which the junction is rendered com-
plete. Instead of placing the thickness of india-rubber between the metal of
the bolt and the cement, it may be disposed between the cement and the
material of the insulator, the cement in this case being in contact with
the metal of the bolt. In either case the india-rubber so disposed yields
sufficiently to prevent fracture of the insulator from expansion or contraction,
while at same time it maintains the requisite hold between it and the bolt
during any degree of expansion or contraction to which it may be subject.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Robert Nicol Reid in the Great Seal Patent Offico on
the 3rd January 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, 1, ROBERT
NICOL REID, of University Street, in the County of Middlesex, Engineer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Third day of July, in the year of our Lord One
thousand eight hundred and sixty, in the twenty-fourth year of Her reign, did,
for Herself, Her heirs and successors, give and grant unto me, the said
Robert Nicol Reid, Her special licence that I, the said Robert Nicol Reid, my
executors, administrators, and assigns, or such others as I, the said Robert
Nicol Reid, 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 ELECTRIC TELEGRAPH PURPOSES," upon the condition (amongst
others) that I, the said Robert Nicol Reid, my executors or administrators, by
an instrument in writing under my, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said In-
vention, 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 Robert Nicol Reid, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement (that is to say):-

page_text: My Invention relates to insulators used for supporting telegraph wires, such
insulators being made of glass, porcelain, china, earthenware, vulcanite or
stone, and consists of a peculiar manner of fixing the bolts or fastenings into
such insulators, which are subject to fracture by reason of the expansion
and contraction of the insulator on a hard substance, such bolts or fastenings
being usually secured therein by cement. I am aware it has been proposed
to employ a yielding substance to bind these bolts in the insulators, which
although of a yielding nature, had not been sufficiently resilient to maintain
the requisite hold between tho insulator and the bolt.
Νοιν my Invention consists in applying a thickness of india-rubber
or similarly elastic substance around the neck and head of the bolt inserted
in the insulator, and around this I fill in suitable cement, by which the junction
is rendered complete. Instead of placing the thickness of india-rubber
between the metal of the bolt and the cement, it may be disposed between
the cement and the material of the insulator, the cement in this case
being In contact with the metal of the bolt. In either case the india-
rubber or other suitable elastic substance so 'disposed yields sufficiently to
prevent fracture of the insulator from expansion or contraction, while at
same time it maintains the requisite hold between it and the bolt during any
degree of expansion or contraction to which it may be subject.
In witness whereof, I, the said Robert Nicol Reid, have hereunto set
my hand and seal, this Second day of January, in the year of our
Lord One thousand eight hundred and sixty-one.
25 Witness,
W. CLARK,
Patent Agent,
53, Chancery Lanc, London,
R. N. REID. (L.8.)