Year: 1885

page_text: We, WILLIAM MITFORD, Engineer, and GEORGE PETTIGREW, Gas Engineer, both
of Hume Terrace, Darlington, in the County of Durham seek leave to amend the
specification of Letters Patent, No. 6212 of 1885, as shown in red ink in the copy
of the original specification hereunto annexed :-
:
Our reasons for making this Amendment are as follows:-
That we are advised that the subject matter of the first and second claims might
be held to be too broad as covering or including what was not new in itself alone
at the date of the Application for the Patent and we are further desirous of
defining the remaining claim more clearly by reference to the Drawings, and also
to correct some clerical errors as shewn in the blue book.
WILLIAM MITFORD.
GEORGE PETTIGREW.
)
In the Matter of the Application made by William Mitford and George Pettigrew
for leave to amend the Specification filed in pursuance of the Application for
Letters Patent N° 6212 of 1885:
DECISION.
I hereby grant leave to the said William Mitford and George Pettigrew to
amend the said Specification in the manner proposed.

page_text: WILLIAM MITFORD, Hume Terrace, Darlington, Engineer, and GEORGE PETTIGREW,
Hume Terrace, Darlington, Gas Engineer, do hereby declare the nature of our
invention for IMPROVED JOINT FOR WATER, STEAM, GAS, DRAIN, OR OTHER PIPES,
to be as follows:-
On the spigot end of the pipe is cast or turned a grove, which may be of any
shape, and there may be one or more of them. In the socket of the pipe is cast or
turned a grove to correspond with the grove. in the spigot.
When the spigot is placed in the socket the grove or groves in the socket comes
over and opposite the grove or groves in the spigot.
The grove or groves forming a space, which may be filled up with lead or any
suitable material.
:
On the Drawing is shown sections of 3 inch cast iron pipe. Fig. 1 is a section of
spigot end of pipe with circular grove cast or turned on the outside and is
marked A. A. Fig. 2 is a section of socket with circular grove cast or turned
inside it to correspond with the grove in spigot and is marked B. B.
Fig. 3 is a section of the joint, with circular space filled with lead C. C.
The space marked d. d. may be filled with yarn or any other suitable material.
Fig. 4 is a section of turned and bored, and lead joint combined, C. C.

page_text: WILLIAM MITFORD Hume Terrace Darlington Engineer, and GEORGE PETTIGREW
Hume Terrace Darlington Gas Engineer do hereby declare the nature of our
invention for IMPROVED JOINT FOR WATER, STEAM, GAS, DRAIN, OR OTHER
PIPES and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
On the spigot end of the pipe, is cast or turned a groove which may be of any
shape or size, and there may be one or more of them.
In the socket of the pipe is cast or turned a groove to correspond with the groove
or grooves in the spigot. When the spigot is placed in the socket the groove or
grooves in the socket comes or come over and opposite the groove or grooves in the
spigot, the groove or grooves forming a space which may be filled up with lead or
any other suitable material.
On the Drawing accompanying our provisional specification are shown sections
of cast iron pipe Fig. 1 is a section of the spigot end of pipe, with circular groove,
cast or turned on the outside, and is marked A. A. Fig. 2 is a section of socket
with circular groove cast or turned inside it to correspond with the groove in the
spigot and is marked B. B. Fig. 3 is a section of the joint, with circular space
filled with lead C. C. The space marked d. d. may be filled with yarn or any
other suitable material, to prevent the lead (or other suitable material) which may
be used to fill the circular space, from passing into the pipe.
Fig. 4 is a section of turned and bored joint, with groove on the spigot and in
the socket which may be filled with lead, and thus forming a turned and bored
joint, with a lead joint combined.
On Drawing No 2. filed with this Specification is shown a section of tapered
joint. The spigot end of the pipe A. Fig. 5. is cast or turned tapered as shown
at E. E.
The socket of the pipe B. is cast or turned tapered to correspond with the spigot.
The diameter of the end of the spigot is made slightly smaller than the diameter
of the socket, so that the spigot will freely enter the socket. When the spigot is
placed in position the tapered space C. C. is filled with lead or any other suitable
material, thus forming a tapered joint as shown in section.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is
1. The grove or groves of any shape-or-size-in-both-spigot-and-socket.
9.-The turned and bored joint, with lead-joint-combined.
4 The tapered joint as shown on Drawing No 2 (Figure 5 ).