Improvements in Mechanism for Use in Casing Boilers and other Heated Surfaces.
Year: 1894

page_text: Date of Application, 1st Mar., 1894
Complete Specification Left, 18th May, 1894-Accepted, 28th July, 1894
PROVISIONAL SPECIFICATION.
Improvements in Mechanism for Use in Casing Boilers and other
Heated Surfaces.
WILLIAM GRANGE TODD Contractor of 48 Hunters Road Handsworth and
ALFRED BORCHERT Mill-furnisher of 16 Wretham Road Handsworth, both in
the County of Warwick do hereby declare the nature of this invention to be as
follows:-
:-
Our invention has for its object the protection of asbestos, felt or other non-
conducting substance used to cover boilers and other heating surfaces, so that
workmen or other persons can walk over the asbestos or other non-conducting
substance to attend to the stop-valves or other fittings used or provided on the
boilers or other heated surfaces.
We do not under this invention claim asbestos or other equivalent material for
use on boilers or other heated surfaces, but we claim the method "hereinafter
described" of protecting such asbestos or other equivalent heat conserving
material.
Our invention consists essentially in a flexible clip-chain, that is to say, a chain
consisting of independent. and separate clips, hinged together to form and forming
a chain.
We will now describe the method of making the clips.
We take a flat blank or piece of sheet metal, of suitable length, which may be
sheet-iron, sheet brass, sheet-steel, or any other suitable metal (of course we prefer
to use sheet-iron for cheapness, nevertheless we can where desired utilize any other
sheet-metal that. is suitable for folding into a clip) the short flat blank would be
turned up at right angles at each end to any suitable distance; near each end the
blank would next be folded flat over, so as to form a clip, a vertical side elevation
of the bent and folded over blauk would present to view the central single flat base
formed from the part of blank not turned over and from such flat base would
project two vertical walls, the flat base and its two vertical walls forming a clip
(the flat base may where desired be curved or corrugated for strength). The
distance between the two walls of the clip may be any width in accordance with the
width of the wood-laggings to be used within the clips.
Each doubled-over end of the clip would be so folded, (or afterwards shaped) as.
to form a loop ready to receive an axial pin or hinge-pin: one end of the clip
would have the central part of hinge-loop removed and the other end of clip would
have the two corners or side parts of hinge-loop removed, thus producing the male
part of a hinge-joint at one end of the clip and the female part of a hinge-joint at
the other end of clip.
Having provided the required number of hinged clips in the manner hereinbefore
described, we next connect the clips together by putting them in a row, end to end
and then passing the male parts into the hinge-slots or female parts provided at
one end of each clip; we can of course make one clip with both ends of hinge
joint sloited and then make the next clip with both ends knuckled; the clips
would be secured together by passing axial-pins or hinge-pins through each knuckle
joint.
It will be readily understood that a flexible clip-chain of any required length can
be made in the manner herein before described.
We utilize our flexible clip-chain in the following manner.
We pass our clip-chain over the flat, concave, convex, polygonal, or other shaped
surface that needs protecting and secure the chain to the surface covered by any

page_text: suitable mechanical or other means, we next pass a second chain over the surface
to be covered, such second chain being by preference parallel with the first chain.
When two clip-chains are fixed with the clips of the first chain lineable with the
clips of the second chain, such series of clips will be in position ready to receive
strips of wood technically known as laggings.
Our clip-chains can be utilized for lagging the whole surface of boilers, steam-
chests, pipes or bends, and also for covering any other surfaces where asbestos, felt,
or other equivalent jacketting is in use and requires protecting.
Our clip-chains are also specially and particularly suitable for use in lagging
patches or portions of boilers or other surfaces at those parts where the traffic of
workmen or others over the soft and yielding jacketting material would destroy
such jacketting material, be it asbestos or other equivalent material.
Altho we have described only two chains in use to receive the laggings, it will
be readily understood that we can use three, four, six, or any required number of
clip-chains, in accordance with the length of the surface to be lagged.
By a second modification of our invention we utilize any ordinary chain made
out of any suitable material in any ordinary or suitable manner, such ordinary
chain forming by itself no part of our invention, but combined with clips con-
stituting a new manufacture which we claim under this second modification as part
of our invention. Under this second modification we provide U shaped clips or
clips of any other suitable transverse section and secure such new clips to the old
style chain in any suitable mechanical manner, so as to form a clip-chain suitable
for use in the same manner as the clip-chain herein before described in first
modification.
What constitutes our invention is the clip-chains as herein described in the first
and second modifications:-for use in the manner described.
Dated this noth day of March 1801
ALFRED WILLIAM TURNER,
Cobden Buildings, Corporation Street, Birmingham,
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Mechanism for Use in Casing Boilers and other
Heated Surfaces.
WILLIAM GRANGE TODD Contractor of 48 Hunters Road Handsworth and
ALFRED BORCHERT Mill-furnisher of 16 Wretham Road Handsworth both in
the County of Warwick do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
Our invention has for its object the protection of asbestos, felt or other non-
conducting substance used to cover boilers and other heating surfaces, so that
workmen or other persons can walk over the asbestos or other non-conducting
substance to attend to the stop-valves or other fittings used or provided on the
boilers or other heated surfaces.
We do not under this invention claim asbestos or other equivalent material for
use on boilers or other heated surfaces, but we claim the method hereinafter
described, of protecting such asbestos or other equivalent heat conserving
material.
The essential part of our invention consists in the production of a flexible clip-
chain, that is to say, a chain consisting of independent and separate clips hinged
together to form and forming a flexible chain.
We will now proceed to describe with reference to the accompanying drawings
the manner in which the several modifications of our invention are constructed and
used.

page_text: Figure 2 represents plan of Figure 1.
Figure 3 represents an isometrical sectional view shewing part of a boiler over
which is placed asbestos, such asbestos being protected by means of laggings held
in position within clip-chain.
Figure 4 represents an isometrical view of bracket suitable for supporting the
ends of clip-chain.
Figure 5 represents an isometrical view of a bracket suitable for building into
the brick work or setting of boiler.
Figure 6 represents a side elevation of one completed clip.
Figure 7 represents a plan of Figure 6.
(Figures 8 to 14 illustrate the second modification.)
Figure 8 represents a side view of old pattern chain connected to boxed clip.
Figure 9 represents a plan of Figure 8.
Figure 10 represents a side view of old pattern chain counected to gripping
clip.
•
Figure 11 represents a plan of Figure 10.
Figure 12 represents a section of Figure 9 on the line A. B.
Figure 13 represents an isometrical view of clip made out of sheet metal blank
partly folded.
Figure 14 represents a section of Figure 11. on the line C. D.
In carrying out our invention we form the first modification in the following
manner; we provide a clip as shewn in detail at Figures 6 and 7, such clip is
formed out of a flat blank, the ends of blank being folded over and turned up at
each end to form vertical walls as shewn at 6 and 6, the flat base part c may where
desired be curved or corrugated to produce greater rigidity or strength, the
distance between the two walls b and b¹ may be any width in accordance with the
width of the wood lagging d to be used with the clip; each doubled over end of
the clip would be so folded or afterwards shaped as to form a loop e ready to receive
an axial pin h, one end of the clip would have the central part of hinge loop
removed and the other end of clip would be formed with the male part g.
We provide any required number of clips and we next connect the clips together
by putting them in a row end to end passing the male parts g into the female parts
or slots f, the clips would be secured together to form a flexible chain by passing
axial-pins or hinge-pins through each knuckle joint.
We do not confine ourselves to the exact method of jointing the clips shewn in
detail at Figure 7 and we can in some cases make a number of clips with male
parts g at both ends and a number of clips with slots fat both ends; it will be
readily understood that a flexible clip-chain of any required length can be made in
the manner herein before described in relation to Figures 1, 2, 6 and 7.
Under the second modification of our invention we provide any ordinary chain
such as the chain shewn in dotted lines at Figures 8, 9, and 12, we then provide
clips made out of a cross-shaped flat blank as shewn on a reduced scale at Figure 13,
the two arms shewn flat would be folded to correspond with the two arms shewn
bent and folded, Figures 8, 9 and 12 show the position of horizontal link k, such
link k would pass through the oval opening formed by the concave edges of the
two bent over arms; the vertical links m aud n would pass out through the side
openings o and p, the bottom edge 7 of edgeway links resting on the inside bed r
of clip, and the top edges of edgeway link being level with or below the clip
lagging bed t; the upper projecting parts marked b² and 63 are the side cheeks of
the clip that correspond to the side cheeks or clipping walls and b of first
modification: Under the second modification we also provide a clip of the shape
shewn in use at Figures 10, 11, and 14, and combine such clip with an old style.
chain in the manner hereinafter described; we provide a cross shaped metal blank
of suitable configuration to bend into a clip, we bend upwards two of the arms into
the two clipping walls 64 and 65 and we bend downwards the remaining arms as
shewn at u and v, the arm u would terminate at w as shewn by the straight part.

page_text: dotted in and the arm v would terminate at x as shewn dotted in, the straight part
of the arms u and would be connected to the horizontal link y of chain by
bending the straight part of arm u over the link y as shewn at and by bending
the straight part of the arm v over the other side of link y as shewn at a a.
We utilize either modification of our clip-chain in the following manner.
We pass our clip-chain over the flat, convex, polygonal, or other shaped surface
that needs protecting and secure the chain to the surface covered, by any suitable
mechanical or other means. In some cases we can where desired provide a bracket
of the shape shewn at Figure 5 and secure the base part bb of such bracket within
the brickwork or setting of boiler, the male part 9 of clip chain would then be secured
within the central part f'; in other cases we can where desired provide a bracket
of the shape shewn at Figure 4 and secure sach bracket to the shell of boiler or
other surface by means of a screw or rivet passed through the hole cc, the male
part of clip-chain could then be secured to the central part 2 of bracket bb, we
merely show the brackets Figure 4 and Figure 5 to demonstrate some mechanical
means whereby our clip-chains can be secured to boilers and other surfaces, but
such fastenments are not the essential parts of our invention; we next pass a
second chain over the boiler or other surface to be covered, such second chain
being by preference parallel with the first chain, when the two clip-chains are
placed or secured in position with the clips of the first chain having the faces of
its walls lineable with the wall faces of the clips of second chain, such series of
clips will be in position ready to receive strips of wood d technically known as
laggings.
Our clip-chains can be used for covering the whole of the exposed surfaces of
boilers, also for covering steam-chests, pipes, bends, and any other surfaces where
asbestos, felt, or other equivalent jacketting is in use and requires protection.
Our clip-chains are also specially and particularly suitable for use in lagging
patches or portions of boilers or other surfaces, at those portions where the traffic
of workmen or others over the soft and yielding jacketting material would destroy
such jacketting material, be it asbestos or other equivalent material.
Although we have described only two chains in use to receive the laggings, it
will be readily understood that we can use three, four, six, or any required number
of clip-chains, in accordance with the length of the surface to be lagged.
Our clip-chains and laggings can be used without securing brackets, such as
shewn at Figures 4 and 5, because the flexibility of our clip-chains is such that
each lagging will have a separate bearing on the asbestos, felt or other covering
over which it passes, consequently the pressure exerted on one, two or more
laggings by the feet of a person walking over the laggings would not be such as
to cause the other laggings not walked over to slip on or over the asbestos, felt, or
other equivalent material.
What constitutes the essential part of our invention is the clip-chains as
described in the first and second modifications, therefore although we do not
propose using our clip-chains and laggings excepting over asbestos or other
equivalent heat conserving material, nevertheless we can where desired supply our
improved clip-chains and laggings for use over heated surfaces that are not covered
with heat conserving material.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1st. The making of a clip-chain in the manner illustrated and described in
relation to Figures 1, 2, 6, and 7, for use with laggings to cover boilers and other
heated surfaces.
2nd. The making of a clip-chain in the manner illustrated and described in
relation to Figures 8, 9, 12 and 13, for use with laggings to cover boilers and other
heated surfaces.
3rd. The making of a clip-chain in the manner illustrated and described in

page_text: relation to Figures 10, 11, and 14, for use with laggings to cover boilers and other-
heated surfaces.
4th. The combination of a clip-chain with strips of wood as illustrated and
described in relation to Figures 1, 2, 3, 6, and 7 to form and forming improved
mechanism suitable for use in casing boilers and other heated surfaces.
5th. The combination of a clip-chain with strips of wood as illustrated and
described in relation to Figures 8, 9, and 12, to form and forming improved
mechanism suitable for use in casing boilers and other heated surfaces.
6th. The combination of a clip-chain with strips of wood as illustrated and
described in relation to Figures 10, 11, and 14 to form and forming improved
mechanism suitable for use in casing boilers and other heated surfaces.
7th. The covering of boilers and other heated surfaces with wood laggings.
secured together by means of clip-chains.
Dated this 17th day of May 1894.
ALFRED WILLIAM TURNER,
Cobden Buildings, Corporation Street, Birmingham,.
Agent for the Applicants.