IMPROVEMENTS IN PIPE JOINTS
Year: 1877

page_text: LETTERS PATENT to Bristow Hunt, of Seile Street, Lincoln's Inn, in the County
of Middlesex, Gentleman, for the Invention of "IMPROVEMENTS IN PIPE JOINTS
A communication from abroad by John Fitch Paisons, of New York, in the
United States of America, Contractor
COMPLETE SPECIFICATION filed by the said Bristow Hunt at the Office
of the Commissioners of Patents on the 31st January 1877
BRISTOW HUNT, of Scile Street, Lincoln's Inn, in the County of Middlesex,
Gentleman "IMPROVEMENTS IN PIPE JOINTS" A communication from abroad by
John Fitch Parsons, of New York, in the United States of America, Contractor
The object of this Invention is to effect a piactical and economical jointing of
pipes (made from any matcial) used for conveying water, gas, compressed au, and
other fluids, so as to make a perfectly tight joint, whether the lengths of pipe be in
line or at an angle towards cach other, caused by mequalities in the support upon
which they rest, and so that the joint will remain tight, although the lengths of
pipe may move after it is former, caused by the settling of the support on which
they rest, such as the mud or sand in the bottom of the river, or the soil under oi
around them, on the bridge on other structure by which they may be supported, or
for any other reason, and so that any one or moie lengths of pipe may be removed
if injured, or for any other cause, and he replaced by another or others, without
disturbing the other lengths of pipe
Such being the nature and object of the said Invention, I will now proceed to
describe more in detail the manner in which the saine is to be or may be performed
01 carried into practical effect, and in order that the same may be distinctly under
stood, I have annexed hereunto one Sheet of Diawings illustrative thereof, and have
marked the same with figuies and letters of reference corresponding with those
in the following explanation thereof, that is to say,-
On the accompanying Drawings Figure 1 represents a perspective view of the
clamps which are employed to carry out this Invention, these clamps may be made
in two, three, or more parts, as desued, Figure 2, a longitudinal section of two
pipes, showing the improved means used for joining them, Figure 3, a transverso

page_text: section of the same; and Figure 4, a similar view to Figure 2, but of another
modification.
A, B, represent two lengths of pipe, the exterior surfaces of their adjacent ends
where the packing is to be applied being cylindrical, as shown, C, D, represent
two clamps which serve to join the pipes together, and which are provided with
ears E, F, united by bolts G in the usual mannci The clamps C, D, are provided
with internal heads II, of the same form as the exterior surfaces of the adjacent
ends of the pipes where the packing is to be placed, and of somewhat larger
diameter (when the clamps are bolted together) than the pipes These beads nie
placed so that one or more of them will be on each side of the adjacent ends of the
pipes when the clamps are bolted together around them The eais E, F, of the
clamps D, C, are also provided with projections 1 and 1ccesses K, of which the
projection on the ear of the one clamp engages with the opposite recess in the eu
of the other clamp (Both projections may be upon the ears of one clamp and both
recesses in the ears of the other clamp, desired) O represents a packing of lead,
or any other suitable material for making joints, which is placed about the adjacent
ends of the pipes, and is of a width exceeding the distance between the beads 1,
its ends, which may be either straight or bevilled, overlapping P represents shoit
pieces of lead, or other suitable packing or jointing material, about the width of the
eais E, F, and placed between them, with one edge abutting against the packing O
In joining the pipes A, B, upon then ends being brought together, the lead or other
packing is bent around the joint and its ends overlapped. The clamps C, D, are
then placed about the adjacent ends of the pipes, over the packing O, and the
pieces of packing P are placed snugly against the packing O, between the ears of
the clamps The bolts G are then put in place and screwed up, which causes the
beads to press about the packing and force it against the cylindrical outer surfaces
of the pipes
As the clamps are screwed together a small portion of the packing O
protrudes between the ears E, F, and the pieces of packing P are pressed in close
contact therewith, and are forced by the projections I into the recesses K, which
prevents them slipping, and affords a fum support to the protruding portion of the
packing O
As the packing surfaces of the pipes are cylindrical, and the portions of the
packing which make the joints are in the form of beads, the pipes can move
longitudinally or angularly, without destroying the joint, and as the clamp is in
two parts it can be readily removed if, from any cause, it is desirable to substitute
a length of pipe for one already joined
When the pipes are to be used to convey any fluid other than compressed air oi
gas the pieces of packing P may be dispensed with, as the portions of the packing O
which protiude between the ears E, F, (when the clamps come nearly together, so as
to leave but a small intervening space) are so compressed as to form a tight_joint
at that point When the pieces of packing P are not used the projections I and
recesses K may also be dispensed with, and the inner surfaces of the cars E, F, made
plain
When the pipes to be joined are to be laid in water, as on the bed of a river,
exterior beads M are formed on then ends, and an annular recess N is made in the
clamps (as shown in Figure 4), so that the pipes as they move cannot ship out of
the clamp, being prevented so doing by the beads M and H, and the walls of the
recess N By these means (which have been put in practical and successful
operation) a perfectly tight joint is for ned, whether the pipes are in line or at an
angle to each other, and which remains tight, although the pipes may move after it
is formed, and allows of one or more lengths being substituted for those already
Joined, without disturbing any other lengths
Having now described the nature and object of my said Invention, together
with the manner in which the same is to be or may be performed or carried into
practical effect, I would remark in conclusion that I claim as the Invention, com-
municated to me by the above-named John Fitch Parsons, the combination and use
of the above-described means of effecting the jointing of pipes in an economical

page_text: and practical manner, substantially as descubed and as illustrated on the accom-
panying Drawings, and especially I claim,―
1 The use, in combination, of clamps having internal beads with suitable
packing in jointing cylindrical adjacent ends of pipes, substantially as shown and
described
2 The use, in combination, of clamps having internal beads and projections and
1ccessos on their eas, with suitable packing in Jointing cylindrical adjacent ends of
pipes, substantially as shown and described
And 3 The use, in combination, of clamps having "internal beads, and formed
with or without projections and recesses on then cars, and with an internal recess
with suitable packing in jointing cylindrical adjacent ends of pipes provided with
exterior end beads, substantially as shown and descubed
In witness whereof, I, the said Bustow Hunt, have hereunto set my hand
and seal, this Thuty-first day of January, in the year of our Loid One
thousand eight hundred and seventy-seven.
BRISTOW HUNT (LS)