APRIL. 1951
AN IMPROVED STIRRER ASSEMBLY
factors. I t must be so mounted that pressure is constantly exert& npon the JOHN T. PATTON seal and the seal must be Wyandotte Chemicals Corporation adequately lubricated.' Wyandotte, Michigan The advantages of this assembly are it;simplicity, ease o f construction, and THEREare many reactions carried out in the average relatively low cost. In this chemical laboratory which require the use of a leak-free laboratory the st,irrer has stirring-assembly. Several such stirring devices have been used successfnlly a t been described in the literature. However, for some pressures hoth above and time there has been in use in this laboratory a stirrer below atmospheric. seal (see illustration) which possesses several advanWe do not claim origitages over those which have been described. nality for this assembly, but This assembly consists of a 18/9 standard ball joint because of the interest exthrough which passes the stirrer shaft. The socket hibited in it by visitors to portion of the joint is either sealed to a standard taper this laboratory, we feel that joint or inserted into a cork or rubber stopper and is its description should be fitted to the reaction flask. The ball portion of the published. , joint is attached to the stirrer shaft by means of a piece Far moat purposes we have of rubber tubing and rotates with the shaft. This asfound "Cello-Grease," Fisher sembly may be used with any appropriate stirrer pro- Scientifio Company, Pittsburgh, peller. Pa., ta be a satisfactory lubriThe tiuccess of this assembly is dependent upon two cant.
n 1 1 1e/9 BALL OlNT
n
n
SOCKET
