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This work was completed several years ago in the Nela Wesearch Laboratories. It was well under way before the papers on this and related subjects by Davis, Paris and Tucker and several others came to our notice.
Measured with a millivoltmeter with range of 50 millivolts over a scale of 150 divisions. Resistance 0.935 ohms.
Unfortunately no record was made of this resistance.
Diagrammatical sketch of electric connections in Tiltometer. Tungsten wires 1, 2, 3, 4 constitute branches of Wheatstone Bridge.
Tiltometer—cross-section and elevation. Drawn to scale. In this experimental form each of the 4 wires as well as the heater has 2 independent leads.
Relation between deflection and rotation of a tungsten wire tiltometer with coiled heater 2.2 V, 0.60 A in bridge; 6.9 V, 0.32 A in heater.
Deflection vs. rotation for a tiltometer with iron wire in bridge and tungsten coil heater.
Deflection (millivolts) vs. rotation for a tiltometer with iron wire (.05 mm) in bridge and tungsten coil heater, for different bridge voltages and healer (operating) voltages.
Deflection vs. rotation for a tiltometer with iron wire (.05 mm) for various heater voltages when bridge voltage is 5 V.
Relation between heater voltage and maximum deflection. Data from curves in Fig. 7.