Theatre Design & Technology - Dec 1966 - 30

RECENT DEVELOPMENTS

GARY W. GAISER

Following the outlining syst"m listed in this deportment in the
October, 1965, issue, the first two digits of

the

identifying

code

heading each item below refer to the operating area, the second

digit

refers

to the organizational

phose, and the third digit

refers to the operating level.

4.1. A new Hub Electric Co. Bulletin (No. 120) "Make
the Auditorium Work for You," by Charles W. Brubaker,
reprinted from Educational Executives' Review is available for distribution from the above-mentioned company.
6.1. The tungsten halogen lamps (quartz-iodine) are becoming an increasingly reliable resource in stage lighting.
The advantages of a long life (2000 hours in more than
50% of the types) and compact size places them in a
favored position. While the problems of heat are not completely solved in the receptacles and luminaires designed
for them, the many well-designed fixtures already in the
field unquestionably point to a major addition in light resources.
Sylvania Electric Products, Inc. portrays the extent of this.
new resource in the accompanying illustration of their
family of tungsten halogen lamps. The lower illustration
graphically demonstrates the operation of the halogen cycle
in four phases. The long-life of these lamps without appreciable darkening of the glass jacket, a third major advantage, is the direct result of the operation of this con·
tinuing cycle. While dimming these lamps interrupts this
cycle, experience at the Indiana University Theatre has
demonstrated that it is no disadvantage. In the long-run
the lamps are burned frequently enough in the halogen
6.1 Specification information on "patch" or interconnectcycle range that the thin, purple coating within the glass
ing panels is hard to come by. For that reason a patent
bulb is removed.
issued to Ross O. Major (Major Equipment Co.) is of
particular interest (U.S. Patent Number 3,231,784, Jan.
25, 1966). Facilities for almost instantaneous switching
are provided by the .. Presto-Patch" system, a factor long
/()HA~GEN GAS
troublesome for the many occasions of changes. This is
TUN6STENl
\
particularly true where dimmers are, as usual, in short
supply.
\
0
)

1 Tungsten particle evaporates.
/

.

·~o

,

0

I

Maior .. presto·Patch"' Panel, 7" 0"' x 10'0"', University of Dayton.
Dimmer-outlet selectors are 2 1, , " on center, and up to 12 units per
stick.

)

2 Tungsten and Halogen gas particles
collide.

®
o

\,
"

/

3 Tungsten combines chemically with
Halogen gas.

\
4 Tungsten particle deposited, Halogen
gas released ready to combine again.

30

~

THEATRE DESIGN AND TECHNOLOGY



Table of Contents for the Digital Edition of Theatre Design & Technology - Dec 1966

Contents
Theatre Design & Technology - Dec 1966 - 1
Theatre Design & Technology - Dec 1966 - 2
Theatre Design & Technology - Dec 1966 - 3
Theatre Design & Technology - Dec 1966 - Contents
Theatre Design & Technology - Dec 1966 - 5
Theatre Design & Technology - Dec 1966 - 6
Theatre Design & Technology - Dec 1966 - 7
Theatre Design & Technology - Dec 1966 - 8
Theatre Design & Technology - Dec 1966 - 9
Theatre Design & Technology - Dec 1966 - 10
Theatre Design & Technology - Dec 1966 - 11
Theatre Design & Technology - Dec 1966 - 12
Theatre Design & Technology - Dec 1966 - 13
Theatre Design & Technology - Dec 1966 - 14
Theatre Design & Technology - Dec 1966 - 15
Theatre Design & Technology - Dec 1966 - 16
Theatre Design & Technology - Dec 1966 - 17
Theatre Design & Technology - Dec 1966 - 18
Theatre Design & Technology - Dec 1966 - 19
Theatre Design & Technology - Dec 1966 - 20
Theatre Design & Technology - Dec 1966 - 21
Theatre Design & Technology - Dec 1966 - 22
Theatre Design & Technology - Dec 1966 - 23
Theatre Design & Technology - Dec 1966 - 24
Theatre Design & Technology - Dec 1966 - 25
Theatre Design & Technology - Dec 1966 - 26
Theatre Design & Technology - Dec 1966 - 27
Theatre Design & Technology - Dec 1966 - 28
Theatre Design & Technology - Dec 1966 - 29
Theatre Design & Technology - Dec 1966 - 30
Theatre Design & Technology - Dec 1966 - 31
Theatre Design & Technology - Dec 1966 - 32
Theatre Design & Technology - Dec 1966 - 33
Theatre Design & Technology - Dec 1966 - 34
Theatre Design & Technology - Dec 1966 - 35
Theatre Design & Technology - Dec 1966 - 36
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