IEEE Power & Energy Magazine - January/February 2017 - 81

(routinely referred to as the
Also in 1931, a GE instalelectrician in theatrical parlation was made at the new
lance) was called the color
Earl Carroll Theatre, located
conductor, and he appeared
across 50th Street from the
in full evening dress.
Roxy Theatre in Manhattan.
This was not a huge theEarl Carroll was a theatrical
ater (or stage), so a modest
impresario along the lines of
50 dimmers were installed,
"Roxy" Rothafel. His female
and almost half of them were
revue called "Vanities" was
devoted to the auditorium
based on Florence Ziegfeld's
lighting, which was really a
highly popular "Follies."
part of the show. The total
The Earl Carroll Theatre
connected lamp load was
(actually the second theater
367 kW, and the thyratronof this name on this site) was
reactor control required a toan Art Deco extravaganza.
tal of only 200 W (just 4 W
The auditorium lighting was
per dimmer). The arrangealmost as elaborate as that
ment of the board was as a
for the stage itself. Lighttwo-scene preset control (see
ing fixtures colored in red,
Figure 4). The saturable core
green, and blue were capable figure 6. Earl Carroll explaining the operation of power
reactors and the tube panels
of being additively mixed distribution panels to three of his employees. [Photo
were installed in racks loto create any color of the courtesy of the Museum of Innovation and Science (miSci)
cated in the basement (see
rainbow (and white). This Archives, Schenectady, New York.]
Figures 5 and 6).
concept had been developed
This elaborate theater existed as
by GE and was called colorama. The actor dimmers was located in a pit outcontrol board for the GE thyratron-re- side of the orchestra pit. The operator such for only eight years. It was then



Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - January/February 2017

IEEE Power & Energy Magazine - January/February 2017 - Cover1
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IEEE Power & Energy Magazine - January/February 2017 - Cover3
IEEE Power & Energy Magazine - January/February 2017 - Cover4
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