Automatic apparatus for connection and disconnection of the absorption tubes

Abstract

An apparatus for automatic connection and disconnection of absorption tubes with spherical or plane joint has been presented for micro elementary analysis. This enables a through-out hand-off operation from connection till weighing and gives following advantages : (1) elimination of wiping errors, (2) less heat- and atmospheric influence by the adoption of an elongated connection and a protecting chamber of absorption tube, and (3) little fear of breaking tubes in the conventional hand-operations.
The apparatus consists of five parts, u. e. a driving motor with an eccentric cam, a transmission mechanism by utilization of levers, a transportation mechanism with a guiding plate sliding on two rails, an absorption tube operator with a special tube stand, and a controlling circuit. The transportation mechanism is equipped with a special delayed-operation device to increase the safety in removing and carrying absorption tubes.
The proper position of absorption tube is kept by a variable position adjustor equipped on the tube stand. The apparatus is equipped with a calculator of an approximate life of manganese dioxide and also a direct-reading indicator of measuring numbers. The time required for either removing or carrying of absorption tube is only 3 sec.