IMPROVEMENTS IN APPARATUS OR APPLIANCES FOR ATTACHING SERVICE PIPES TO WATER, GAS, OR OTHER MAINS WHILE UNDER PRESSURE.
Year: 1878

page_text: LETTERS PATENT to Richard Ravenor, of Speenhamland, in the County of
Berks, for the Invention of "IMPROVEMENTS IN APPARATUS OR APPLIANCES
FOR ATTACHING SERVICE PIPES TO WATER, GAS, OR OTHER MAINS WHILE
UNDER PRESSURE.
"
Sealed the 17th January 1879, and dated the 24th July 1878.
Scaled the 17th January 1879, and dated the 24th July 1878.
PROVISIONAL SPECIFICATION left by the said Richard Ravenor at the Office
"IMPROVEMENTS
of the Commissioners of Patents on the 24th July 1878.
RICHARD RAVENOR, of Speenhaṁland, in the County of Berks.
IN APPARATUS OR APPLIANCES FOR ATTACHING SERVICE PIPES TO WATER, GAS, OR
OTHER MAINS WHILE UNDER PRESSURE."
The object of my Invention is to provide simple and effective means for con-
necting service pipes to mains without disconnecting or cutting off the supply, and
a convenient way of carrying the Invention into effect is as follows:-
To the main from which the supply is to be taken I firmly connect a cramp
which is made to correspond in shape with that of the contour of the main pipe,
and to the cramp a stop valve and stuffing box. I provide for the purposes of my.
Invention a service pipe of a convenient length as may be required, and of a
diameter to correspond with that of the valve; the end of the service pipe is
threaded for connecting same to main, as hereafter described.
To bore the main I insert drill in valve, open same, and bore; and I subsequently
tap the aperture with a thread to correspond with that on the end of the service
pipe. The hole bored and tapped, I withdraw the tool just above the tap or valve;

page_text: I then close the tap of valve and withdraw the tool, the main being then ready to
receive the service pipe aforesaid. To connect the latter I insert same in valve as I
did the tool or tools; the tap of valve is then opened and the service pipe is
dropped down and screwed into the aperture previously bored in the main pipe.
The upper end of service pipe is stopped by a plug screwed thereon and the stop
valve is removed. I now screw on a back nut, and then a diminishing T connecting
piece with the house or premises; the plug is then withdrawn sufficiently far to
allow full waterway; a top back nut is placed on to keep the parts secure.
the pressure is excessive I provide means for resisting the same on the tools and
pipe by means of screw cramp; jack, or other suitable appliance or tackle.
-
Where

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Richard Ravenor in the Great Seal Patent Office on the 24th January
1879.
"IMPROVEMENTS
RICHARD RAVENOR, of Speenhamland, in the County of Berks.
IN APPARATUS OR APPLIANCES FOR ATTACHING SERVICE PIPES TO WATER, GAS, OR
OTHER MAINS WHILE UNDER PRESSURE."
The object of my Invention is to provide simple and effective means for con-
necting service pipes to mains without disconnecting or cutting off the supply, and
a convenient way of carrying the Invention into effect is as follows; and the
Invention will be best understood by reference to the accompanying Drawings.
Figure 1 of the accompanying Drawings is an external elevation of a main fitted
with cramp appliance and valve according to one arrangement of my Invention ;
Figure 2 is a section of the same.
Figure 3 is an external elevation of a main fitted with similar cramp applianco
and with modified form of valve; Figure 4 is a section of the same.
Figure 5 is a side elevation of Figure 3 showing the main and saddle in cross
section.
Figure 6 shows a service pipe attached to a main with T piece connection.
Similar letters of reference refer to like parts in all the Figures.
b
To the main a from which the supply is to be taken I firmly connect a cramp
which is made to correspond in shape with that of the contour of the main pipe a.
Between the cramp and main pipe a I place an india-rubber ring m so as to make
a tight joint, and to the cramp a stop valve and stuffing box c, such as is shown in
section at either Figures 2 or 4. d is the service pipe for the purposes of my
Invention, and of a convenient length as may be required, and of a diameter to
correspond with that of the valve; the end e of the service pipe is threaded for
connecting same to main as hereafter described.
To bore the main I insert a drill fin valve, open same, and bore. I subsequently
tap the aperture made in main with a thread to correspond with that on the end of
the service pipe d. The hole bored and tapped I withdraw the tool just above the
tap of valve; I then close the tap of valve and withdraw the tool, the main being
then ready to receive the service pipe d aforesaid. To connect the latter I insert
same in valve as I did the tool or tools; the tap of valve is then opened and the
service pipe is dropped down and screwed into the aperture previously bored in the
main pipe a.
The upper end of service pipe is stopped by a plug g screwed therein
and the stop valve is removed. I now screw on a back nuth and then a diminishing
T connecting piece i with the house or premises; the plug is then withdrawn
sufficiently far to allow full waterway; a top back nut k is placed on to keep the
parts secure. Where the pressure is excessive I provide means for resisting the
same on the tools and pipe by means of screw cramp, jack, or other suitable
appliance or tackle.
Figure 7 shows an arrangement for connecting nipples and short pieces of pipe.
n is a short piece of pipe fitted with a plug p; on this plug p is screwed a long
piece of pipe q for passing through the valve and stuffing box c. The long piece of
pipe q is removed after the operation is completed.
Having now described the nature of the said Invention, and in what manner the
same is to be performed, I declare that I claim as my improvements in apparatus or
appliances for attaching service pipes to water, gas, or other mains while under
pressure, the employment of stop valve in combination with drill tool and service

page_text: pipe, operating in manner and for the purposes substantially as described, and
illustrated with reference to the accompanying Drawings, together with any mere
modification or modifications thereof.
In witness whereof, I, the said Richard Ravenor, have hereunto set my hand
and seal, this Twenty-second day of January, in the year of our Lord One 5
thousand eight hundred and seventy-nine.
RICHARD RAVENOR. (L.S.)