Recording apparatus for measuring small changes in gas volume in reaction vessels

Claim 1

MEASURING APPARATUS FOR MEASUREMENT OF SMALL CHANGES IN GAS QUANTITY IN A REACTION VESSEL WHERE THE REACTION VESSEL IS RIGIDLY CONNECTED WITH A CAPILLARY MANOMETER AND BOTH THE REACTION VESSEL AND THE MANOMETER ARE SHAKEN DURING THE REACTION AND THE CAPILLARY DUCT OF THE MANOMETER IS CONNECTED AT ONE END TO THE REACTION VESSEL AND AT THE OTHER END TO A LIQUID WELL, COMPRISING A SECOND VESSEL HAVING A VOLUME CORRESPONDING TO THE VOLUME OF THE REACTION VESSEL, A FLEXIBLE TUBE COMMUNICATING AT ONE END WITH SAID WELL AND AT ITS OPPOSITE END WITH SAID SECOND VESSEL AND FILLED WITH A COLUMN OF LIQUID, AND MEANS OPERABLE BY CHANGES IN HEIGHT OF LIQUID IN SAID SECOND VESSEL IN ACCORDANCE WITH VARIATIONS IN PRESSURE IN THE REACTION VESSEL FOR VARYING THE HEIGHT OF SAID SECOND VESSEL, THEREBY TO RESTORE THE LIQUID IN SAID SECOND VESSEL TO A NULL POINT IN ITS HEIGHT IN SAID SECOND VESSEL, AND MEANS FOR INDICATING MOVEMENTS OF SAID SECOND VESSEL.