[N079005], Technical Note, Francis Robbins Upton, June 23rd, 1879


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[N079005], Technical Note, Francis Robbins Upton, June 23rd, 1879

Editor's Notes

regulator 4 inches of .003 20% Pt. Iridium wire heated to brillian yellow. Having a 6.9 ohm resistance cold whent the regulator put on the wire fell to blackness; fr.373 How to test in shunt circuit, more tests; fr. 376 "The spring raises a very small part of an inche in giving a spark. I can sight over the Wt and barely see it rise when the machine is regulating. Mr Edison suggests a regulator which shall move up and down so that perhaps three sparks a minute shall be given. The lever vibrates between two points making and breaking it, when it breaks it must fall a distance before making contacts" apparently a regulator for dynamos; fr. 381 "Why a wire does not represent a lamp especially a short length" in these tests of regulator; fr. 386 small regulator tests; fr. 387 new regulator tests; fr. 389 "Regulator acts upon the current say 1/2 the time the current is regulated away. But the current that flows through is more effective so it gives off more energy. Therefore a regulator must be tested by a spiral and not by a galvanometer. Ex. First put the current through a spiral until the deflection is 10 or 12 degrees and note the color. The[n] try the regulator to adjust to that. The regulator making its own magnet acts proportionally to the energy of the current so long as the strength of the magnet increase proportionally to the current. ?This accounts for the tact that the more battery put on the regulator the less current flows. The current means more energy. The galvanometer measures the average amount of electricity flowing through it. One test ofa good regulator is that the strength of the current should decrease with addition of more. The regulator must have a constant amt of work to do and this should be something in the main like an friction. The best test of a regulator would be to put it on an Electro Dynamometer and see how near to a constant deflection could be obtained under varying conditions of E.M.F. Put a sounder in circuit and obtained breaks showing that the regulator actually broke the circuit and not simply introduced the resistance of an arc."



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Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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