| These are commercially available quartz rod controllers. They have a 13” ceramic tube in them. This works be placing the stainless steel tube that contains the quartz or ceramic rod inside a larger tube that steam flows past. Thus the steel tube is close to the same temperature as the steam. It expands and contracts thermally. The ceramic tube does not have thermal expansion and as it is spring loaded to press against the closed end of the steel tube, then the free end moves back and forth. The free end is spring loaded and actuates, using a small spacer, a micro switch actuated by a bell crank with about a ten to one mechanical advantage. This is the classic analogue method of determining steam temperature and thus controlling a steam generator. These can be replaced by a temperature transducer. |
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Burling Instruments quartz rod controller model F-2C, cost $800 with two micro-switches top, with 1967 Model VD-2S bottom sold to the Williams Brothers for $85. Both use a 13” long ceramic hollow tube. |
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The Williams had two of these in the Victress car. It appears that one was in the transition zone and controlled the main water pumps. The other was in the output steam zone and controlled the normalize. |
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