of the projector case and prevent proper cooling of the
f. Secure the thumbscrews with the wingnut and the
washers (fig. 2-2).
Inserting Acetate Roll on Attachments
f. Adjust the feet of the projector to level the projector if
the mounting surface is tilted.
a. Determine the desired direction of projected image
movement to establish which roll attachment will be the
Mounting Roll Attachments
supply (storage) roll and which the takeup roll.
a Remove the wingnuts and washers shown in figure 1-
2 from the thumb screws on the roll attachments (fig. 1-
b. Place one slotted end of the acetate roll spool over
the key of the spring-loaded end of the supply roll
b. Select a desired direction for the movement of the
projected image when the roll attachment is cranked
c. Press the spring-loaded end of the supply roll
during operation. (The projected image can be moved
attachment, compressing the spring enough to permit
from side-to-side or up and down.)
the slot of the other end of the acetate roll spool to fit
over the key on the crank end of the supply roll
c. Press the spring lock button (fig. 1-1): use any
suitable pointed object.
d. Install an empty roll spool on the takeup roll
d. Raise the top plate assembly (fig. 1-1) until it is
attachment as described in b and c above.
locked in the open position by the interlock arm (fig. 2-2).
e. Guide the leading edge of the acetate roll over the top
e. Push the thumbscrews that pass through the roll
of the stage ass on the top plate assembly to the empty
attachment brackets through the holes on the left and
right ides or on the front and back ends of the case
Use the side holes to mount the roll
f. Attach the leading edge of the acetate roll to the
attachments with the cranks facing forward if side-to-side
takeup spool: use plastic tape.
movement has been selected. Use the end holes to
mount the roll attachments with the cranks facing to the
g. Crank the takeup roll attachment to check the
left of the projector if up-and-down movement has been
operation o the roll attachment and the acetate roll.
OPERATION UNDER USUAL CONDITIONS
lecture by writing on the acetate roll without moving from
the location of the projector.
The applications of the projector are determined by the
e. Illustrative material developed during one class or
nature of the information being described to a class or
lecture can be rolled up and stored for future reuse.
When planning the use of the
projector, consider the following:
f. Masks can be used with the transparencies to
emphasize certain information and obscure other
a. The projection of a transparency can provide a far
information on a selective basis.
more effective and economical means of presenting
many types of information than is possible when
g. Overlays can be used with transparencies to show
individual copies of the material containing the
stages of an operation.
information are distributed to each member of a class or
h. Strips of colored cellophane, or other transparent
material, can be placed at selected points on a
b. Time and effort otherwise spend at a chalkboard can
transparency to provide emphasis, or make a distinction,
be saved by preparing information for viewing with the
between two or more simultaneously projected items of
c. Preparation of information for viewing with the
i. The shape of opaque objects placed on the stage
projector is less fatiguing to an audience than the
glass can be projected in two dimensions at a time.
development of large quantities of information on a
Information can be presented during class or