Experiments with Three Light T-H. Dynamo No. 79
Reading edition
The dynamo was run by a large pulley (about four and one half feet in diameter) on the same shaft as the fly wheel and beside the latter. Two lamps were put in circuit with a Deprez-Carpentier ammeter and a volt meter of the same make was put in between the brushes. First one lamp (old Thomson style) was switched out of circuit, the dynamo started and when speed was reached the circuit made. The following readings were taken when the engine made 139 & the dynamo 1122 revolutions per minute.
Readings At End of One Lamp Two Lamps When 2nd lamp was switched in When 2nd Lamp was switched out
Amp. Volts Amp. Volts Amp. Volts Amp. Volts
1 second 10 55 10 110 6.7 55 14 110
30 " 10 55 10 110 10 75 10 85
2 Min 10 55 10 110 10 109 10 60
3 " 10 55 10 110 10 110 10 55
Fig. 25
consisting of drawing of Sawyer Man lamp cut from catalogue, and trimmed to contour of drawing
Fig. 26
a drawing showing action of key in Sawyer Man lamp, cut to contour
Fig. 27
a drawing of the Thomson Rice Individual distributor cut from cataloug and pasted in.
Fig. 28
a drawing cut from pamphlet showing “Method of using Thomson Rice Individual distributor”
Fig. 29
a drawing cut from pamphlet showing “Prof. Thomsons incandescent lamp—series incandescent lamp”
Fig. 30
Drawing showing “method of using the Series Incandescent Lamp manufactured by the Thomson-Houston Elec. Co.” cut from your pamphlet and pasted on a similar sheet.
A photographer of La Fayette photoed the Gas Company’s plant of T & H in this city one evening at 10 o’clock when several lights were burning in room. I had a large one printed and pasted on a piece of bristol board of the same size as this sheet, and put in my original copy.