Improvements in Devices for Closing Mud-holes and other Apertures in Steam-boilers and similar Apparatus.
Year: 1891

page_text: Date of Application, 21st Feb., 1891
Complete Specification Left, 27th Oct., 1891-Accepted, 5th Dec., 1891
PROVISIONAL SPECIFICATION.
Improvements in Devices for Closing Mud-holes and other
Apertures in Steam-boilers and similar Apparatus.
I, ANTOINE ROMAIN THIRION, of 11, Boulevard Magenta, Paris, in the
Republic of France, do hereby declare the nature of this invention to be as
follows:-
My invention relates to devices for closing mud-holes and other apertures in
steam-boilers and similar apparatus.
This improved device presents the advantage that the lid of the same can be put
in its place by introducing it from the exterior of the steam boiler or other
apparatus and that it can be fixed without being liable to be projected to the
outside if the bolt which serves for fixing it should break through tightening the
joint when the boiler or other apparatus is under pressure.
In order to render my invention better understood I have represented it in the
accompanying drawing, but only by way of example.
In the drawing,
Figure 1 shows part of the improved device constructed according to my said
invention.
Figure 2 represents the same device, its lid being put in the position for
enabling the introduction of the same through the mud-hole or other aperture.
Figure 3 shows a front view of the lid.
Figure 4 represents a rear view of the cap employed in my device.
Figure 5 is a vertical section taken on the line 1-2 of Figure 3, of the device
put in its place and tightened.
Figure 6 represents a section, taken on the line 3-4 of Figure 3 of the device
put in its place and tightened.
As shown in the drawing, and more particularly in Figure 3, the lid is of
circular form, and has a flange interrupted at two diametrically opposite points.
At the exterior surface of this lid are provided two lugs cc which receive between
them the eye d of the bolt e held by an axis f. The said lid can be turned upon
this axis so that it may be inclined relatively to the bolt as shown in Figure 2.
Upon the bolt e is slid the cap a represented in Figure 4. This cap is interiorly
provided with plane surfaces which correspond to the sides of the two lugs e con
the lid a in such a manner that it cannot turn when the nut is screwed down.
This cap g has moreover two small holes jj for the escape of the steam which
may pass through the joint..
The joint is made by means of a beveled weldless ring of red copper or the
like which under the pressure exerted through the medium of the cap y engages
with a beveled groove formed by the edge of the mud-hole or other aperture and
the periphery of the lid.
b
For obtaining a good joint it is in the first place needful that the flange on the
lid shall properly bear upon the interior surface m of the mud-hole or other
aperture, and that in the second place the ring k shall be pressed tightly into the
groove l.
For putting the lid in its place the two parts of the flange are turned in the
direction in which the lid is to be inclined, which enables them to be introduced
through a hole of smaller diameter. When it is in the interior the lid is turned
again. Then the aforesaid ring is placed in the groove, the cap slid upon the bolt,
and sufficient pressure exerted through the medium of the nut for obtaining a
perfect joint..
5
It is understood that the above-described-device can be applied to other

page_text: apparatus than steam-boilers, for example to any reservoirs requiring to be
hermetically closed by means of a removable device. My device may be provided
with more than one hinged bolt if its size should render them necessary.
Dated this 20th day of February 1891.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
i
COMPLETE SPECIFICATION.
Improvements in Devices for Closing Mud-holes and other
Apertures in Steam-boilers and similar Apparatus.
I, ANTOINE ROMAIN THIRION, of 11, Boulevard Magenta, Paris in the
Republic of France, 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 invention relates to devices for closing mud-holes and other apertures in
steam-boilers and similar apparatus.
The improved device possesses the advantage that the lid of the same can be put
in its place by introducing it from the exterior of the steam boiler or other
apparatus, and that it can be fixed without the liability of being projected to the
outside if the bolt, which serves for fixing it, should break through tightening the
joint when the boiler or other apparatus is under pressure.
In order to render my invention better understood I have represented it by way
of example in the drawing left with my Provisional Specification.
In the said drawing,
Figure 1 shows part of the improved device constructed according to my said
invention.
Figure 2 represents the same device with the lid in the position for enabling the
introduction of the same through the mud-hole or other aperture.
Figure 3 shows a front view of the lid.
Figure 4 represents a rear view of the cap employed in my device.
Figure 5 is a vertical section taken on the line 1-2 of Figure 3, of the device
when in place and tightened up.
2. .
Figure 6 represents a section on the line 3-4 of Figure 3, of the device when in
place and tightened up.
As shown more particularly in Figure 3, the lid a is of circular form, and has a
flange interrupted at two diametrically opposite points. At the exterior surface
of this lid are provided two lugs cc which receive between them the eye d of the
bolt e held by an axis f. The said lid can be turned upon this axis so that it may
be inclined relatively to the bolt as shown in Figure 2.
Upon the bolt e is slid the cap g represented in Figure 4. This cap is interiorly
provided with plane surfaces which correspond to the sides of the two lugs cc' ou
the lid a in such a manner that it cannot turn when the nut is screwed down.
This cap g has moreover two small holes jj for the escape of the, steam which
may pass through the joint.
The joint is made by means of a bevelled weldless ring k of red copper or the
like which under the pressure exerted through the medium of the cap g engages
with a bevelled groove formed by the edge of the mud-hole or other aperture and
the periphery of the lid.
For obtaining a good joint it is in the first place needful that the flange b on the
lid shall properly bear upon the interior surface m of the mud-hole or other
aperture and that in the second place the ring k shall be pressed tightly into the
groove. l.
For putting the lid in its place the two parts of the flange are turned in the
direction in which the lid is to be inclined, which enables them to be introduced

page_text: groove, the cap
slid upon
through a hole of smaller diameter. When it is in the interior the lid is turned
again. The aforesaid ring is then introduced into the
the
bolt, and sufficient pressure exerted through the medium of the nut for obtaining a
perfect joint.
It is understood that the above described device can be applied to other
apparatus than steam-boilers, for example to any reservoirs requiring to be
hermetically closed by means of a removable device. My device may be provided
with more than one hinged bolt if its size should render them necessary.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
A closing device formed of a lid a, having flanges b, in combination with a bolt e
pivoted to an axis so that this lid may be introduced into a hole of less diameter
than the flanges, the said closing device also comprising a bevelled ring & which is
forced into a groove of corresponding form provided at the joint of the lid and
aperture by means of a cap g upon which bears a nut e screwed upon the articulated
bolt, the whole as described and represented in the drawing.
Dated this 27th day of October 1891.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.