IMPROVED MEANS FOR PREVENTING THE RADIATION OF HEAT FROM STEAM BOILERS OR PIPES.
Year: 1882

page_text: 7
LETTERS PATENT to John Roberts of Oldham, and George Travis of
Failsworth both in the County of Lancaster, for an Invention of
"
IMPROVED
MEANS FOR PREVENTING THE RADIATION OF HEAT FROM STEAM BOILERS OR
PIPES.'
"'
PROVISIONAL SPECIFICATION left by the said John Roberts and George
Travis at the Office of the Commissioners of Patents on the 5th October
1882.
JOHN ROBERTS of Oldham and GEORGE TRAVIS of Failsworth, both in the
County of Lancaster "IMPROVED MEANS FOR PREVENTING THE RADIATION OF
HEAT FROM STEAM BOILERS OR PIPES
"
Our invention consists; principally in the use for this purpose of a layer of
ground cork (which is a very good non-conductor of heat) in combination with the
ordinary composition or material usually employed
In carrying out our Invention, we first coat the boiler or pipe with a layer of the
ordinary composition or material, such layer being much thinner than usual.
We then prepare an outer casing or shell of the same composition or material,
but of such a diameter as will leave a cylindrical cavity of an inch (or more or less)
in thickness between its inner circumference and the outer surface of the first
coating or layer.
We then fill in this cylindrical cavity with the ground cork pressed in closely,
and it will be found in practise that the use of this material (ground cork), in
combination with the ordinary composition or material in the manner described
will most effectually prevent the loss or radiation of heat from the steam boiler or
pipe so protected.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Roberts and George Travis in the Great Seal Patent
Office on the 4th April 1883.
JOHN ROBERTS of Oldham and GEORGE TRAVIS of Failsworth, both in the
County of Lancaster 'IMPROVED MEANS FOR PREVENTING THE RADIATION OF
HEAT FROM STEAM BOILERS OR PIPES"
Our invention consists principally in the use or employment for this purpose of
a layer of ground or otherwise disintegrated cork (which is a very efficient non-
conductor of heat) in combination with the ordinary composition or material
usually employed.
In carrying out our invention in connection with a steam boiler we first coat the
upper surface of the same with a layer of the ordinary composition or material,
such layer being much thinner than usual.
Over this coating when dry we then lay on a conting of an inch thick (more or
less) of the ground or disintegrated cork, pressing the same down closely and over
this we lay on a second coating of the ordinary composition or material, so that
there is a cavity of about an inch thick between the two layers of the ordinary
composition or material which is filled in with the ground or disintegrated cork
pressed closely together and it will be found in practise that the use of this
material (ground cork) in combination with the ordinary composition or material
in the manner described will most effectually prevent the loss or radiation of heat
from the surface of the boiler.
In treating pipes which require to be perfectly surrounded by the non-
conducting material, as the ground cork cannot be made to adhere all round the
pipe in the loose state, we pack the ground cork in long tubular cases of calico or
other suitable material, and we coil these closely round the pipe over the first layer
of the ordinary composition or material and then apply the second coating of the
latter as before.
Having now described the nature and object of our said invention together with
the manner in which the same is to be or may be performed or carried into
practical effect we wish it to be understood that we claim as our Invention the use
or employment in the manner and for the purpose above described and set förth, of
ground or otherwise disintegrated cork in combination with an inner and outer
layer or coating of the ordinary composition or material usually employed.'
In witness whereof we the said John Roberts and George Travis have
hereunto set our hands and seals this third day of April in the year of
our Lord one thousand eight hundred and eighty three.
JOHN ROBERTS
(L.S.)
GEORGE TRAVIS (L.S:)