Theatre Design & Technology - Spring 1975 - 33

Figure 7. Center pivot drilled for 1-1/2" pipe (flanged to stage
floor) access hole in ply top.

center pivot wagon was constructed with two toggles,
three inches apart. A steel plate drilled to accept a
1-1/2" pipe formed the pivot point (Figure 7), the
pipe being flanged to the stage floor, and the
electrical connections for the motor being brought up
through the pipe. Alignment of the fixed wheels
occurred after total assembly of all units, by means
of a socket wrench inserted through the access hole
drilled in the plywood top immediately above the
wheel mounting stem, Figure 8. A temporary strike
of this setting (due to an interruption of the
production schedule) can be accomplished by loosening the wheel stem nuts, realigning the wheels to the
offstage direction of travel, disconnecting the motor
and removing the pivot pipe from its flange.
Re-setting reverses the process. Thus a revolver
placed directly on the stage floor (and not on a
castored wagon) which uses fixed wheels for reciprocating movement does not need to be disassembled
for temporary strike. Castors were not used as they
require re-alignment (with resultant lateral movement) for a new direction of travel, causing drag and
pull on the pivot pipe. However, with re-alignable
fixed Wheels, the advantages of both fixed and
swivel wheels are incorporated into one unit. It is
advisable to cut a screw-driver slot across the top of
the wheel stem to ease changing direction of travel.

Figure 8. Top view of corner looking down at wheel spindle, with
peep socket used for adjusting wheel direction. Top of spindle is
marked for slotting.

steel rod is attached to the floor and the rod inserted
into a corner wheel-mounting plate.
Equipment needed for construction is a pivoting
metal cutting band-saw (Dayton or equivalent), a
drill-press, and arc-welder. Cutting through a piece
of angle takes approximately 20-30 seconds.
Mt. Hood Community College Theatre Shop
intends to build more units of this type, eventually
replacing all existing wood-framed platforms. The
universality of use, the extended life, and the
compatibility of each unit should provide efficient
and continual use in various design requirements.
Steel weight bearing structures are proving to be an
integral part of modern theatre technology.
*

- - - WANTED - - Back Issues of
Buhnentechnische Rundschau

Contact:

Armond Marion
311 First Avenue, South
Seattle, Washington 98104
(206) 624-7473 or 284-6448

For jack-knife pivoting, a pivot-support of 5/8"

~

THEATRE DESIGN AND TECHNOLOGY

SPRING. 1975

33



Table of Contents for the Digital Edition of Theatre Design & Technology - Spring 1975

Contents
Theatre Design & Technology - Spring 1975 - 1
Theatre Design & Technology - Spring 1975 - 2
Theatre Design & Technology - Spring 1975 - 3
Theatre Design & Technology - Spring 1975 - Contents
Theatre Design & Technology - Spring 1975 - 5
Theatre Design & Technology - Spring 1975 - 6
Theatre Design & Technology - Spring 1975 - 7
Theatre Design & Technology - Spring 1975 - 8
Theatre Design & Technology - Spring 1975 - 9
Theatre Design & Technology - Spring 1975 - 10
Theatre Design & Technology - Spring 1975 - 11
Theatre Design & Technology - Spring 1975 - 12
Theatre Design & Technology - Spring 1975 - 13
Theatre Design & Technology - Spring 1975 - 14
Theatre Design & Technology - Spring 1975 - 15
Theatre Design & Technology - Spring 1975 - 16
Theatre Design & Technology - Spring 1975 - 17
Theatre Design & Technology - Spring 1975 - 18
Theatre Design & Technology - Spring 1975 - 19
Theatre Design & Technology - Spring 1975 - 20
Theatre Design & Technology - Spring 1975 - 21
Theatre Design & Technology - Spring 1975 - 22
Theatre Design & Technology - Spring 1975 - 23
Theatre Design & Technology - Spring 1975 - 24
Theatre Design & Technology - Spring 1975 - 25
Theatre Design & Technology - Spring 1975 - 26
Theatre Design & Technology - Spring 1975 - 27
Theatre Design & Technology - Spring 1975 - 28
Theatre Design & Technology - Spring 1975 - 29
Theatre Design & Technology - Spring 1975 - 30
Theatre Design & Technology - Spring 1975 - 31
Theatre Design & Technology - Spring 1975 - 32
Theatre Design & Technology - Spring 1975 - 33
Theatre Design & Technology - Spring 1975 - 34
Theatre Design & Technology - Spring 1975 - 35
Theatre Design & Technology - Spring 1975 - 36
Theatre Design & Technology - Spring 1975 - 37
Theatre Design & Technology - Spring 1975 - 38
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Theatre Design & Technology - Spring 1975 - 40
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