SOLENOID WITH LOCKING PLUNGER 



SLOTTED INDEXING YOKE 



DETENT WHEEL 



DRIVING LUG 



Ml CARTA DISK 



SPRING-LOADED RUBBER-FACED 



THERMOMETER SUPPORT CUPS 



REVERSING THERMOMETER 



BALL BEARING INSIDE SHAFT 

 ':== STIRRING PROPELLERS 

 SCREW ADJUSTABLE CUPS 

 REVERSING THERMOMETER RACK 

 - DRIVING LUG 

 COUPLING 



Figure 4a. Rack for holding 24 reversing fhermometers and including stirring 

 propellers at diagonal corners. 



REVERSING THERMOMETER 

 PLATINUM THERMOMETER 



QUARTZ CRYSTAL SENSOR 

 STIRRING PROPELLER 



Figure 4b. Platinum resistance thermometer and quartz temperature probe. 



11 



