improvements in Gagging or Covering Steam Domers and other Vessels to Prevent Radiation of Heat; also for Covering Steam Pipes, Liquid Pipes, Refrigerators, or other Vessels from which it is an Object to Exclude Heat or Cold.
Year: 1884

page_text: improvements in Gagging or Covering Steam Domers and other
Vessels to Prevent Radiation of Heat; also for Covering
Steam Pipes, Liquid Pipes, Refrigerators, or other Vessels
from which it is an Object to Exclude Heat or Cold.
I, CHRISTOPHER JOSEPH DUNN, of Watercourse, in the City of Cork, Ireland,
Tanner, do hereby declare the nature of said invention for "IMPROVEMENTS IN
LAGGING OR COVERING STEAM BOILERS AND OTHER VESSELS TO PREVENT RADIATION
OF HEAT ALSO FOR COVERING STEAM PIPES, LIQUID PIPES, REFRIGERATORS, OR
OTHER VESSELS FROM WHICH IT IS AN OBJECT TO EXCLUDE HEAT OR COLD
as follows:
"
to be
This invention relates to the production of improved lagging suitable for
covering steam boilers steam pipes refrigerators and other articles to prevent
radiation or conduction of heat and has for object the construction of the lagging
in such manner that it may be readily applied to the body to be protected, or be
readily removed therefrom whether to allow of inspection or repair or for other
purpose.
To this end according to my invention I construct lagging in separate sections or
parts each consisting of a box or case with enclosed non-conducting substance as
I will now explain.
Referring to the accompanying sheet of illustrative drawings Fig. 1 is a sectional
view of one of my improved lagging sections or parts shewing its application to a
curved body such as a steam boiler set in brickwork and Fig. 2 is a sectional view
of the same taken at right angles to Fig. 1. Fig. 3 is an underside view of one of
the lagging sections. a is a frame, the four sides a¹ of which are formed of wood
united in any convenient manner. b is sheet metal bent over at the ends b' and
secured to the frame at 6 by nails b³. c is the inner surface of the lagging section
formed of canvas, asbestos cloth, or the like, secured to the frame by nails c¹ as
shown. d is the non-conducting filling of the interior, it may be plasterer's hair or
other similar cheap substance that is a bad conductor of heat. e represents the
body to which the lagging sections are applied. In the case of horizontal boilers
of which the upper part only requires lagging (such as boilers set in brickwork)

page_text: and the like the lagging sections or parts may rest simply over the top as shown
without necessarily being secured thereto, but in the case of vertical or other
boilers or bodies required to be lagged round their entire circumference or surfaces
a ring of lagging sections or parts may be held in position by means of a strap or
belt or straps or belts encircling them and united at the ends in any convenient
manner, or the outer surfaces of the sections may be provided with projections or
eyes for securing one to the other by pins or screws or other convenient means.
It is to be understood that the frames of the lagging sections may be of any
desired dimensions and may be constructed of metal.
To prevent the radiation or transmission of heat through the joints between
adjacent sections the latter may be tongued or overlapped.
It will be readily seen that lagging sections constructed and arranged as described
and shewn whilst being efficient non-conductors of heat, may be readily applied to
the body to be protected, or be removed therefrom when desired.
D
1
1004
W. LLOYD WISE,
Per F. J. Brougham,
Applicant's Agent.

page_text: Steam Pipes, Liquid Pipes, Refrigerators, or other Vessels
from which it is an Object to Exclude Heat or Cold.
I, CHRISTOPHER JOSEPH DUNN, of Water-course in the City of Cork, Ireland,
Tanner, do hereby declare the nature of my invention for "IMPROVEMENTS IN
LAGGING TO PREVENT RADIATION OR TRANSMISSION OF HEAT". and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
This invention has for object the production of a cheap and efficient lagging
suitable for covering steam boilers, steam pipes, refrigerators and other articles, to
prevent radiation or conduction of heat and constructed in such manner that it
may be readily applied to the body to be protected or readily removed therefrom
whether to allow of inspection or repair or for any other purpose.
According to my invention I construct my lagging in separate sections or-parts
each consisting of a box or case filled with substance that is a non-conductor or a
bad conductor of heat as I will now explain.
Referring to the accompanying sheet of illustrative drawings, Fig. 1 is a
sectional view of one of my improved lagging sections or parts showing its
application to a curved body such as a steam-boiler the lower part of which is set
in brickwork. Fig. 2 is a sectional view of the same taken at right angles to
Fig. 1. Fig. 3 is an underside view of the lagging section. a is a strong frame
shaped to fit the body to be covered and united at the angles in any convenient
manner. It may be of wood or it may be of iron of a strength proportioned to the
size of the section and the weight of the enclosed material. For refrigerators it
may be of ordinary wood or of iron; for boilers worked at a low pressure, it may
be of iron or of wood previously baked, but for boilers worked at a high pressure
where the heat at the surface of the boiler is greater or where the lagging sections
are very large, I may make the frame-work entirely of iron. In that case I may
also use a thin layer of some insulating or non-conducting substance between the
frame and the sheeting. c is the inner surface of the lagging section formed of any
suitable material such as light sheet iron, wood, cloth, canvas, asbestos cloth, or the
like, secured to the frame by nails c¹ as shown or by screws, or rivets. b is the
outer covering of sheet metal or wood, secured to the frame in like manner. It is
shewn as of light sheet metal (such as iron) bent over at the ends 6' and secured to
the frame at 6 by nails b³. & is the non-conducting filling of the interior; it
may be plasterer's hair, ashes, sand, or other similar cheap substance that is a bad
conductor of heat. e represents the body to which the lagging sections are applied.
In the case of a horizontal boiler of which the upper part only requires lagging
(such as a boiler set in brickwork) and the like, the lagging sections may simply
rest over the top as shown, without necessarily being secured thereto; but in the
case of vertical, or other boilers, or bodies, requiring to be lagged round their entire

page_text: circumferences or surfaces, a ring of lagging sections or parts may be held in
position by means of a strap or belt or straps or belts encircling them and united
at the ends in any convenient manner; or the outer surfaces of the sections may be
provided with projections or eyes for securing one to the other by pins or screws or
by any other convenient means.
In the case of steam boilers, particularly where the heat is great, I prefer
making the inner covering of my lagging sections of thin sheet iron as above
mentioned. If made of cloth or canvas it is advantageous previously to render
the same incombustible, which may be effected by any known chemical process.
.
The wood of the frames, where wooden frames are used and the air or other
internal filling of the sections may be rendered incombustible by being subjected
to a similar chemical process,-I do not however claim as of my invention the
use of any chemical process for rendering the materials of my lagging sections
indestructible or more durable. Under ordinary circumstances they will last a
considerable time without any such treatment.
To prevent radiation or transmission of heat through the joints between adjacent
sections, the latter may be tongued or overlapped.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
The improved lagging to prevent radiation or transmission of heat constructed in
sections or parts each comprising a box or case consisting of a frame to suit the
shape of the surface to be protected and an inner and an outer covering, such box
or case being filled with a nonconductor of heat such as specified, and the arrange-
ment being such that the lagging section can be readily removed and replaced,
substantially as hereinbefore described with reference to and illustrated in the
drawings for the purposes set forth.