Pump control arrangement for a drainage apparatus

Claim 1

DRAINAGE APPARATUS OF THE TYPE WHEREIN A MOTOR DRIVEN SUCTION PUMP IS CARRIED ON A SUPPORT STRUCTURE FOR PUMPING FLUID FROM A FLUID-RECEIVING FUNNEL EITHER DETACHABLY SUSPENDED IN A POSITION BENEATH A FLUID DRAIN OPENING FOR RECEIVING A FLUID FLOWING THROUGH SAID OPENING OR RETRACTED FROM SAID POSITION, AND WHEREIN CONVEYING MEANS ARE PROVIDED FOR PASSING FLUID FROM THE OUTLET OF SAID PUMP TO A REMOTELY LOCATED WASTE DRUM, THE IMPROVEMENT COMPRISING A REEL CARRIED BY SAID SUPPORT STRUCTURE, A HOSE CONNECTED BETWEEN SAID FUNNEL AND THE INLET OF SAID PUMP AND EITHER REELED IN SUCCESSIVE CONVOLUTIONS UPON SAID REEL WHILE RETRACTING SAID CONNECTED FUNNEL TOWARD SAID REEL OR UNREELED FROM SAID REEL TO PERMIT SAID FUNNEL TO BE DETACHABLY SUSPENDED BENEATH SAID OPENING, A LEVER ARM ENGAGED BY ONE OF SAID HOSE CONVOLUTIONS IN RESPONSE TO THE REELING OF SAID ONE HOSE CONVOLUTIONS ON SAID REEL AND DISENGAGED THEREFROM IN RESPONSE TO THE UNREELING OF SAID ONE HOSE CONVOLUTION FROM SAID REEL, AND AN ELECTRICAL SWITCH CLOSED IN RESPONSE TO THE DISENGAGEMENT OF SAID LEVER ARM FROM SAID ONE CONVOLUTION FOR OPERATING SAID MOTOR DRIVEN PUMP TO PUMP FLUID FROM SAID FUNNEL THROUGH SAID HOSE AND INLET FOR PASSAGE TO SAID WASTE DRUM AND OPENED BY SAID LEVER ARM TO PREVENT OPERATION OF SAID MOTOR DRIVEN PUMP IN RESPONSE TO THE ENGAGEMENT OF SAID LEVER ARM WITH SAID ONE CONVOLUTION.