[N012112] Technical Note, January 1879
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Title
[N012112] Technical Note, January 1879
Editor's Notes
Upton heat equations; followed by commutator attempts and then more Upton calcs regarding ratio of lamp resistance to internal resistance of generator, number of lamps changes but ratio is 4,000 lamp resistance to 1 generator, then 3,000 to 1, then 25 to 1, 5 to 1, 10 to 1, 50 to 1, 250 to 1, 1,000 to 1; following this is calcs related to resistance of copper wire .001 in diameter table and calcs of varying lengths, then table of varying ohms at 100 foot length -- Lake Superior copper; fr. 214 "Table cost of E.L." Table 1 cost H.P 1/2 cent per hour (number of lights per HP, cost per lamp per hour, per 10 hour day, per moenth 30 days, per year 365 days), followed by calcs re weight and conductivity of copper conductors and reference to table continuing Sprague; distribution network costs based on 500 ohm lamp to 1/10 ohm conductor to determine maximum lamps, conductor 1/10 total toatl resistance of conductor 1/10 machine 1/20 1/16, 1/4, 1/2 mile, cost per lamp per conductor for service; calcs re ratios of resistance of lamp to that of machine and conductors; discussion and calcs related to regulating changing load, fr. 228 "It is required that the resistance of all the lamps when in multiple arc be five times that of all the outside conductors so that when all are on the temperature shall give 1389 units of heat whenif only one wire on without regulating it there would be only about 1995 degrees given off so that it would be needful to regulate away about 1/3 when only one lamp wa on"; lamps in house calculations and diagram; fr. 231 "There is in each house a certain amount of wire which is constant if we think of the houses as units it can be seen that double the number of houses will half the resistance and proportionally to obtain the same effect the whole resistance must be half that is no of machines and the cross section of the conducting wires must be doubled." calculations show cost of conductors less closer to station; fr. 235 meter calculations
Supplied year and month
Author
Date
1879-01-00
Type
Folder/Volume ID
N012-F
Microfilm ID
30:171
Document ID
N012112
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University