By-passing device with a trap for land irrigation and other applications

Claim 1

A PORTABLE DUAL SIPHON FOR USE IN LIFTING WATER OVER THE WALL OF AN IRRIGATION DITCH, SAID DUAL SIPHON COMPRISING A CURVED PIPE OPEN AT BOTH ENDS AND ADAPTED TO BE MOUNTED ON THE WALL OF A DITCH, SAID PIPE BEING DEFINED BY AN ARCHED LOWER WALL BRIDGING AND DEFINING A CENTRAL CHANNEL, AN ARCHED UPPER WALL ALSO BRIDGING SAID CHANNEL BUT SPACED FURTHER THEREFROM, AND SIDE WALLS CONNECTING SAID UPPER AND LOWER WALLS TO DEFINE SAID PIPE, SAID SIDE WALLS EXTENDING IN A DIRECTION TRANSVERSE TO SAID CHANNEL, SAID PIPE BEING DIVIDED BY AN INTERMEDIATE LONGITUDINAL WALL INTO UPPER AND LOWER SIPHONS, SAID UPPER SIPHON BEING LARGER IN CROSS-SECTION THAN SAID LOWER SIPHON, ONE OF SAID SIDE WALLS BEING PROVIDED WITH AN OPENING AT ONE END OF SAID LOWER SIPHON SO THAT WHEN THE END OF SAID SIPHON PROVIDED WITH SAID OPENING IS IMMERSED IN WATER AND MOVED PERPENDICULARLY WITH RESPECT TO SAID SIDE WALLS AND PARALLEL TO SAID CHANNEL, WATER MAY BE FORCED THROUGH SAID OPENING AND LOWER SIPHON TO PRIME SAID LOWER SIPHON, AND SAID INTERMEDIATE LONGITUDINAL WALL TERMINATING SHORT OF THE OTHER WALLS AT THE END REMOTE FROM SAID SIDE WALL OPENING, WHILE SAID LOWER WALL COMPRISIES A SHORT SECTION WHICH IS BENT ANGULARLY TOWARD SAID UPPER WALL JUST BEYOND THE END OF SAID INTERMEDIATE WALL, WHEREBY THE LOWER SIPHON WILL DISCHARGE LIQUID AS A JET DOWNWARDLY WITH RESPECT TO THE UPPER SIPHON, THE LENGTH AND CROSS-SECTIONAL AREA OF SAID UPPER SIPHON BEING SO CORRELATED THAT THE JET DISCHARGED FROM SAID LOWER SIPHON WILL BE SUFFICIENT TO PRIME THE UPPER SIPHON.