Interlock Coupling Joints for Water, Gas, or Steam Pipes (1885/3262)

The same year he renewed his 1881 patent he submitted his last valve related patent application on 13th March, 1885.

The invention was described as follows:-

The said Invention relates to novel means for uniting and securing together the ends of pipes or tubes with their connections employed for conveying water, gas, sewage and other liquids or fluids, the said Invention being applicable to pipes made of metal, earthenware or other materials ordinarily employed for the purpose.

The coupling however is more especially designed to economise time, and generally, to facilitate the operations required in the fixing, removal or re-fixing of any desired section or portion of a system of cast iron pipes so that the same can be performed without disturbing or damaging in any way either the section removed or fixed or the adjoining pipes.

To make the joints or couplings according my Invention I form a socket or chamber divided longitudinally into two parts. Upon each I cast or form two or more lugs, ears, tabs, hooks or their equivalent in such a way that when brought together the lugs, tabs, ears or hooks of the one part shall dovetail or work into the lugs, ears tabs or hooks of the other part so that when a Screw Bolt, Screw or their equivalent is passed through the lugs, ears, tabs hooks or their equivalent the two parts Of the socket become so locked together that they form one chambered socket. Or instead of this the two parts of the coupling may be made to abut up to each other and be locked and secured by lugs, clips, hooks, screws, bolts or their equivalent. A small portion of this socket at one of its ends is made slightly larger than the diameter of the pipes to be united and forms the bottom of the chambered socket. The remaining portion of this socket, when only one is used, is made of a sufficient length and diameter internally to admit, between its interior surface and the exterior surface of the pipes to be united, one iron or other loose metal ring or collar and two loose India-rubber or other elastic compressible rings or collar. On one end of one of the pipes or tubes to be united and at a proper distance therefrom I cast or secure a Flange, ring or collar with two or more lugs, ears or tabs corresponding with those on the socket above described which receive the same Screw Bolts, Screws or their equivalent that are used for locking the two parts of the socket together. Instead of this Flange, ring or collar being cast upon or secured to the pipe I sometimes (as when two spigot ends are required to be connected) use a loose flange ring or collar which is made to slide upon one of the pipes or tubes to be united. In order to make the joints of the united pipes perfectly air or liquid tight I place upon the end of the pipe which passes through the bottom of chambered socket an India-rubber or other elastic packing ring which rests upon the bottom of chamber and in like manner I place upon the end of the other pipe an India-rubber or other elastic ring which rests upon or against the fixed or loose metal ring before described. The two ends of the pipes protruding through the elastic rings are brought nearly together inside the inner metal ring or collar placed in the centre of the chambered socket. When the various parts of the Coupling and pipes or tubes are in these relative positions the nuts upon the Bolt are screwed up to the Flange, lugs or tabs (or when Screws are used the Screws are screwed into the Flange, lugs, tabs or their equivalent) whereupon the Collar or ring upon one of the pipes to be united and the bottom of the chambered socket sliding upon the other of the same pipes are drawn together and forced against the elastic rings in such a way that the latter become compressed and are caused to bind tightly against the interior of the chambered socket, the exterior of the pipes united and the sides of the metal ring into which the ends of the two pipes enter. By this means the two sections or pipes will be perfectly secured together and prevented from separating until the nuts or screws have been slackened and the bolts or screws removed, whereupon the two parts of the socket become unlocked and can be readily separated from each other. When this is done the elastic packing rings and metal ring or collar can be removed and the pipe set at liberty in a few minutes.

Instead of using one chambered socket of two parts long enough to contain the one metal and two elastic rings and a fixed or loose compressing Flange, ring or collar, I sometimes use two chambered sockets of equal length and each composed of two parts each being long enough only to contain one elastic ring and a small portion of the inner metal ring. One of these sockets is placed upon one end of each of the pipes to be united the two ends meeting as before in the metal ring or collar. The two sockets are then locked and secured together in the same way and with the same result as when one socket and a fixed or loose ring is used as before described.

When it is desired to use my Invention for uniting pipes of small diameter I prefer to dispense with the Screw Bolts or Screws and instead of these addition to the lugs, hooks or their equivalent, form a screw upon the interior the of the flange collar or its equivalent and a corresponding Screw upon the exterior chambered socket. By screwing the Flange, collar or its equivalent upon the chambered socket formed of two parts the India-rubber or other elastic packing material therein contained is compressed and the join made air or liquid tight.