Conversion of Hobart Model A-200 Electric Mixer to Air Drive for Use in Mixing Pyrotechnic Compositions

摘要

During development of a catalyst generator, a special need arose for a somewhat universal mixer to thoroughly blend pyrotechnic mixes of various types under special conditions. The search for a mixer which could be used to mix these pyrotechnic mixes of approximately 20 lb. in size, on a reproducible as well as a productive basis led to the Model A-200 (Planetary Action) Mixer Manufactured by the Hobart Manufacturing Company, Troy, Ohio. Preliminary testing of this mixer, with its planetary action, proved that it would meet the criteria already mentioned. One problem remained, however. The Model A-200 Mixer is equipped from the factory with the standard type electrical motor and related equipment which would not permit the Model A-200 to be used to mix pyrotechnic mixes because of safety requirements. Since this mixer provided the proper mixing action, it was suggested that the electrical motor and related controls (switches) be replaced with an air motor to adapt this mixer to meet the safety requirements. A description of how the Model A-200 Mixer was converted from electrically to air driven power is presented. (Author)