94. This Contractor shall furnish and install as
hereinafter specified the necessary machinery of operating the contour
curtain. It shall consist of thirteen
direct connected machines with a deep groove drum operated by a worm gear drive
built into the frame of the motor. The
hoist machines shall be set on sound proof bases. Each machine shall have a one-quarter (1/4")
inch flexible steel cable so as to allow the free running of the cable and
close packing on the drum. The machines
are to have a special indicator carried down to the proscenium wall to the
stage to an indicator board which shall show the position of each line and give
the form of the curtain. Limit switches
are to be installed on this indicator; they are to be adjustable to control the
form of the curtain and so arranged that a form can be pre-set and this form
continually used. This is to allow the
person operating the curtain to select the design of the curtain and operate
same by master push button. Each motor
shall also be able to operate separately with its "Up",
"Down", and "Stop" buttons.
There shall be thirteen (13) sets at the bottom of this control besides
the master set. This Contractor is to
build the cabinet with its limit switches, push buttons, master control and set
cabinet in place. This Contractor is to
furnish motors, control panels and indicator panels but all other electrical
work is to be done by OTHERS.