Theatre Design & Technology - Spring 1979 - 14
A Test
of
Poly-Vinyl
Flooring
Series 60 electro-hydraulic proportional control valves.
The linear motion of the screw ram can, therefore, be
precisely controlled, synchronized, and positively locked in
any position by an extremely low torque on what are, by
comparison with conventional screw systems, very small diameter interconnecting shafts. The hydraulic circuit is controlled via the Series 60 electro-hydraulic proportional control
valves. The proportional control levers, located on the remote
control console giving the high accuracies and infi nite speed
variation associated with this type of hydraulic circuit.
For Facilities
Utilized
by Dance
Eurovision Song Contest
and Theatre
The last example we shall look at is a revolving stage set for
the Eurovision Song Contest of 1977. The specified requirement was for a centerless annular ring stage of 14.63m outside diameter, 10m inside diameter, and 300mm high. The
stage was to rotate at infinitely variable speeds of up to 1 rpm,
in either direction, to be controlled from a position in the
director's box. A total distributed payload of nine metric tons
was to be carried.
Perhaps the major problem was that the orchestra, together with sensitive microphones, was to be situated on the
static floor area within the revolving stage. Thus an exceptionally low operational noise level was necessary. The
revolving stage was supported on forty-two 125mm diameter
polyurethane-tired wheels, while the drive and lateral guidance was 3pplied by two groups of three 250mm diameter
friction wheels acting on the outer rim of the revolving structure.
Power was supplied to the drive wheels by two Kontak 14cylinder radial piston fluid motors, the output shafts of which
were fitted with 50mm diameter rollers located between the
outer drive wheels.
(All the equipment discussed in these examples was designed, manufactured, and installed by Tele-Stage Associates Limited.)
12
Theatre Design & Technology
by Dennis J. Sporre
Table of Contents for the Digital Edition of Theatre Design & Technology - Spring 1979
Contents
Theatre Design & Technology - Spring 1979 - 1
Theatre Design & Technology - Spring 1979 - 2
Theatre Design & Technology - Spring 1979 - 3
Theatre Design & Technology - Spring 1979 - Contents
Theatre Design & Technology - Spring 1979 - 5
Theatre Design & Technology - Spring 1979 - 6
Theatre Design & Technology - Spring 1979 - 7
Theatre Design & Technology - Spring 1979 - 8
Theatre Design & Technology - Spring 1979 - 9
Theatre Design & Technology - Spring 1979 - 10
Theatre Design & Technology - Spring 1979 - 11
Theatre Design & Technology - Spring 1979 - 12
Theatre Design & Technology - Spring 1979 - 13
Theatre Design & Technology - Spring 1979 - 14
Theatre Design & Technology - Spring 1979 - 15
Theatre Design & Technology - Spring 1979 - 16
Theatre Design & Technology - Spring 1979 - 17
Theatre Design & Technology - Spring 1979 - 18
Theatre Design & Technology - Spring 1979 - 19
Theatre Design & Technology - Spring 1979 - 20
Theatre Design & Technology - Spring 1979 - 21
Theatre Design & Technology - Spring 1979 - 22
Theatre Design & Technology - Spring 1979 - 23
Theatre Design & Technology - Spring 1979 - 24
Theatre Design & Technology - Spring 1979 - 25
Theatre Design & Technology - Spring 1979 - 26
Theatre Design & Technology - Spring 1979 - 27
Theatre Design & Technology - Spring 1979 - 28
Theatre Design & Technology - Spring 1979 - 29
Theatre Design & Technology - Spring 1979 - 30
Theatre Design & Technology - Spring 1979 - 31
Theatre Design & Technology - Spring 1979 - 32
Theatre Design & Technology - Spring 1979 - 33
Theatre Design & Technology - Spring 1979 - 34
Theatre Design & Technology - Spring 1979 - 35
Theatre Design & Technology - Spring 1979 - 36
Theatre Design & Technology - Spring 1979 - 37
Theatre Design & Technology - Spring 1979 - 38
Theatre Design & Technology - Spring 1979 - 39
Theatre Design & Technology - Spring 1979 - 40
Theatre Design & Technology - Spring 1979 - 41
Theatre Design & Technology - Spring 1979 - 42
Theatre Design & Technology - Spring 1979 - 43
Theatre Design & Technology - Spring 1979 - 44
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