IMPROVEMENTS IN JOINTS OR COUPLINGS FOR PIPES OR TUBES
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by John Henry Johnson at the Office of
the Commissioners of Patents on the 24th June 1880. A communication
from abroad by Jules Louis Bernardin Bodel, of Paris, in the Republic of
France.
JOHN HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of Middlesex,
Gentleman. "IMPROVEMENTS IN JOINTS OR COUPLINGS FOR PIPES OR TUBES."
A communication from abroad by Jules Louis Bernardin Bodel, of Paris, in the
Republic of France.
This Invention relates to an improved joint or coupling for pipes or tubes, and it
consists of the combination and arrangement of parts hereinafter described.
In carrying out this Invention a washer of india rubber or other elastic substance
is placed between a male-and a female tube, the former tube being provided with a
projecting or oxternal flange, and the latter with an internal lip or flange, a portion
of which is cut away on one side forming an oval mouth to the tube, whilst the
remaining portion engages with and retains one side of the flange on the male tube.
The female tube is further provided with two lugs carrying a pin, upon which is
pivotted a lever acting as a catch or cramp, being caused to engage with the other
side of the flange on the male tube by means of a hand lever, jointed to the tail
of the cramp by a pin passing through two lugs formed on one extremity of the
latter lever. This hand lever is curved at one extremity, and is provided at its
opposite extremity with a cam shaped or eccentric surface working against the
surface of the tubo.
Both the male and female tubes may be connected to flexible tubes or hose in the
usual manner.
In order to couple together the two lengths of hose provided with the coupling
device hereinbefore described, the flange on the male tube is placed in the recess in
the female tube and caused to engage with the internal hip hereinbefore described.
The lever jointed to the extremity of the cramp, and which lever has been previously
placed at right angles to the tube, is then caused to turn upon its centre until its
bent extremity comes in contact with the side of the male tube. During this
motion of the jointed lever the cam shaped or eccentric surface on the other
extremity of the said lever bears against the female tubo, and causes the cramp to
turn upon the pin on which it is pivotted, so that its bent extremity engages with
the flange upon the male tubo and presses this flange forcibly against the india.

page_text: rubber washer, at the same time forcing the said flange with a wedging action under
the lip on the opposite side of the tube.
The cam shaped extremity of the jointed lever is of such a form that it
maintains the cramp forcibly pressed against the flange of the male tube by simply
bearing against the side of the female tubo.
By means of this Invention all screw threads, keys, and the like are dispensed
with, whilst great security is obtained against leakage at the coupling under
pressure or in consequence of foreign bodies, such, for example, as gravel, sand, and
the like, being accidentally lodged in the joint as is frequently the case with
couplings as heretofore constructed.