Filling and venting construction for an electric storage battery

Claim 1

AN ELECTRIC STORAGE BATTERY COVER FOR A BATTERY HAVING A PLURALITY OF CELLS COMPRISING A BATTERY COVER HAVING A RECESSED FILLING TROUGH WITH A FILLING WELL FOR EACH CELL LOCATED IN THE BOTTOM OF SAID FILLING TROUGH, A CHANNEL SEPARATE FROM AND RUNNING SUBSTANTIALLY PARALLEL TO THE FILLING THROUGH WITH VENT OPENINGS FOR EACH CELL ALIGNED IN SAID CHANNEL, VENTING PASSAGES CONNECTING THE FILLING TROUGH AND THE CELL VENTS IN THE CHANNEL, A TRANSPARENT SLIDING COVER OF SUFFICIENT LENGTH AND WIDTH AND POSITIONED IN THE BATTERY COVER SO AS TO COMPLETELY COVER BOTH THE FILLING TROUGH AND THE CHANNEL, SAID SLIDING COVER CONTAINING VENTING MEANS SO AS TO ENABLE GASES EVOLVED IN EACH CELL TO ESCAPE INTO THE ATMOSPHERE, AND PERMANENTLY ATTACHED TO THE UNDERSIDE OF SAID SLIDING COVER AND POSITIONED TO RIDE IN SAID CHANNEL A PLURALITY OF PIECES OF RESILIENT ELECTROLYTE RESISTANT MATERIAL WHICH ARE ATTACHED TO THE SLIDING COVER IN SUCH A MANNER THAT WHEN THE COVER IS PARTIALLY SLID FROM THE TOP OF THE BATTERY COVER EXPOSING A PORTION OF THE FILLING TROUGH TO THE ATMOSPHERE, SAID PIECES OF RESILIENT MATERIAL ARE POSITIONED OVER ALL OF THE CELL VENT OPENINGS IN THE CHANNEL SO AS TO FORM A POSITIVE SEAL FOR ALL OF THE CELL VENTS, BUT WHEN THE SLIDING COVER IS IN POSITION TO COMPLETELY COVER THE FILLING TROUGH, THE CELL VENT OPENINGS ARE NOT COVERED BY THE RESILIENT MATERIAL.