Magnetic-pneumatic liquid level control

Claim 1

A liquid level control means comprising: (a) body means adapted to be inserted and sealed into the wall of a chamber containing a liquid to be controlled to a selected level; said body having a first end and a second end, each having a cavity of selected size and shape, with a wall sealing between the first cavity in the first end and the second cavity in the second end; said body being positioned in elevation relative to the selected liquid level; (b) arm means pivotally supported in said first cavity; said arm means having a float on one end and a first magnet on the other end being disposed in a portion of said first cavity, said first magnet positioned to move in a plane that is parallel to the pivotal movement of said float; (c) reciprocating magnet holder means positioned in a bore of said second cavity defined by the first cavity and the first cavity portion so as to be guided to move perpendicular to said plane of said first magnet; said holder having a second magnet in its end, facing said first magnet with said wall between said first and second magnets; said magnets arranged to attract each other, or to repel each other depending on the position of said float and said first arm; (d) pivoted shuttle rod means positioned with a first end controlled by the position of said magnet holder; the second end of said pivoted shuttle rod having means to control said selected liquid level.