Improvements in Tubbing for Lining Mine Shafts, Tunnels, and the like.
Year: 1899

page_text: Date of Application, 2nd June, 1899
Comentato Cannifination Loft 20th Fab 1000 Accented 7th Ann 1000
PROVISIONAL SPECIFICATION.
Improvements in Tubbing for Lining Mine Shafts, Tunnels,
and the like.
I, FRANCIS COULSON, of Aykleyheads, Durham, in the County of Durham,
Engineer, do hereby declare the nature of this invention to be as follows:-
My improvements refer to tubbing for lining mine shafts tunnels and the
like more especially where, as in cases of passing through water bearing strata
it is necessary or advisable to exclude the water.
In the ordinary method the joints between the segments are made of socalled
wood sheeting or sheathing tightly wedged; the sheeting is preferably of taper
section the thick end at the back or outside, and the width of sheeting and
hence the width of flange is about 3 to 4 inches. In a shaft say for instance
20 feet in diameter and with 14 segments round, and where naturally the afore-
said wedge joints are tighter on the inside than on the outside there is a great
tendency for the shape to alter, and that is just what frequently happens, the
tubbing sometimes becoming oval and sometimes quite irregular and the more
so the tighter the wedging.
Now the object of my invention is to provide a joint having no such tendency
or defect. For this purpose I so construct the joint that any tendency to
alteration in the relative position of the parts is checked by the jointed parts
flanges being in hard metallic contact and incapable of displacement. In
one form I make one flange with an annular circumferential upstanding rim
and the adjoining flange with a corresponding recess into which the aforesaid
rim bottoms or nearly so, the somewhat taper sheeting being kept in place
by the rim. In each segment two of the flanges will be provided with pro-
jecting rims and two with recesses; whilst in the case of the vertical joints
the projecting rims are stopped off to the extent of the projecting rims on the
circular joints.
In the case of the vertical joints I may keep the projecting portion of flange
rather short, and lay on and back up a course of tubbing (as say when lining a
mine shaft) after the sheeting has been put in as the segments were placed in
position. Or the sheeting may be put in afterwards by making it in two pieces,
one wedge shaped and one parallel, the former being put in first. In order
to ensure absolute rigidity by metallic contact of the parts I by preference
use strips of wedge shaped hoop iron for the joints.
a
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.

page_text: Improvements in Tubbing for Lining Mine Shafts, Tunnels,
and the like.
I, FRANCIS COULSON, of Aykleyheads, Durham, in the County of Durham,
Engineer, 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:
-
My improvements refer to tubbing for lining mine shafts, tunnels and the
like more especially where, as in cases of passing through water bearing strata
it is necessary or advisable to exclude the water.
In the ordinary method the joints between the segments are made of so called
wood sheeting or sheathing tightly wedged; the sheeting is preferably of taper
section the thick end at the back or outside, and the width of sheeting and
hence the width of flange is about 3 to 4 inches. In a shaft say for instance
20 feet in diameter and with 14 segments round, and where naturally the afore-
said wedge joints are tighter on the inside than on the outside there is a great
tendency for the shape to alter, and that is just what frequently happens, the
tubbing sometimes becoming oval and sometimes quite irregular and the more
so the tighter the wedging.
Now the object of my invention is to provide a joint having no such tendency
or defect. For this purpose I so construct the joint that any tendency to
alteration in the relative position of the parts is checked by the jointed parts
or flanges being in hard metallic contact and incapable of displacement. In
one form I make one flange with an annular circumferential upstanding rim
and the adjoining flange with a corresponding recess into which the aforesaid
rim bottoms or nearly so, the somewhat taper sheeting being kept in place
by the rim. In each segment two of the flanges will be provided with pro-
jecting rims and two with recesses; whilst in the case of the vertical joints
the projecting rims are stopped off to the extent of the projecting rims on the
circular joints..
In the case of the vertical joints I may keep the projecting portion of flange
rather short, and lay on and back up a course of tubbing (as say when lining a
mine shaft) after the sheeting has been put in as the segments were placed in
position. Or the sheeting may be put in afterwards by making it in two pieces,
one wedge shaped and one parallel, the former being put in first. In order
to ensure absolute rigidity by metallic contacts of the parts I by preference
use strips of wedge shaped iron for packing the vertical joints; this in con-
junction with the increased width of flange of the ring makes the tubbing
secure against displacement by external pressure, so that the true circular form
is preserved.
In the accompanying drawing Fig. 1 is a sectional elevation of the horizontal
flanging and Fig. 2 a plan view of the vertical flanging; Fig. 3 is a plan view
of a slightly different vertical flanging. Fig. 4 is a front view of the tubbing,
Fig. 5 a plan, and Fig. 6 a back view of same, and Fig. 7 a section on
line AB Fig. 4.
The shaft lining is made up of the required number of segmental tubbing
pieces shown in Figs. 4 to 7. An upstanding rim or tongue a is formed along
the upper edge, and a recess b is along the lower edge; thus a rim or tongue a
of one tubbing fits with metal to metal in the recess b of the next higher
tubbing, as shown in Fig. 1. This forms the horizontal joints. Each tubbing
piece or segment is also formed with a projecting rim or tongue con one side

page_text: while the rim is stopped off at the other side to the same extent as shown
at d thus a projecting tongue piece c of one tubbing segment fits metal to
metal into the set off d in the horizontally adjoining segment see Fig. 2 or
with a small space between which is filled with a rolled iron wedge stripe,
see Fig. 3; this latter arrangement possesses the advantage of securing the
required rigidity at a smaller cost, because no fitting is required; f represents
wood filling in pieces or so called sheeting at the horizontal and vertical
joints. The metallic contact in the recesses 6, Fig. 1, is not so important as in
the case of the vertical joints, Figs. 2 and 3.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, declare that what
I claim is
Tubbing for lining mine shafts, tunnels and the like consisting of rings each
consisting of segmental pieces having outer vertical tongue and recess joints
with or without iron wedges each ring also making horizontal joint with the
next higher and the next lower ring by outer tongues and recesses, substan-
tially as described and shown.
JENSEN & SON,
77, Chancery Lane, London, W.C., Chartered Patent Agents.