An elevation screw at the back of the mirror housing is used
to adjust tile vertical angle of the mirror. The support arm
is a black, cralckle-finish, aluminum casting with a split tube
at one end and a split ring at the other end. The tube fits
over the support post, and a pinion in the tube engages the
rack on the post. The mirror housing rests on the split ring
and is held in place by three screws. A 14-inch.focal length
lens fits into the bottom of the ring and ,is secured in position
by a locking screw that extends through both sides of the split
ring. A lens cap is provided to protect. the exposed lens
element.
c. Power Cord. A 15-foot power cord with a male plug connector
at one end and a female plug connector at the other end is used to
attach the projector to a 115- to 120-volt, 60-cycle, alternating-current
(ac) power suppply.
d. Cellophane Roll Attachment. The roll attachment consists of
two parts: a supply unit and a take-up) unit. The take-up unit of
the PH-637/PFP includes A cutoff blade. Each unit has a rotatable
pivot at one end and a station pivot at the other end. The rotat-
able pivot on each unit is spring-mounted and attached to a crank
handle. A roll of cellophane or plastic is held in position by the
pivots on the supply unit, and the material is unwound over the
projection stage and atttached to a cardboard roll on the take-up
unit. When a section of cellophane or plastic has been used on the
PH-637/PFP, it may be either wound on the take-up roll for re-use
or ripped off over the cutoff blade for disposal. (When the writing
or drawing has been made with a grease pencil it may be wiped off
with a soft cloth and the cellophane may be used again.) For the
PH-637/PFP, the roll attachment is provided with captive screws
by which it can be attached to the sides of the housing. For the
PH-637.\/PFP, the attachment is built into the housing; the supply
unit is at the front and the take-up) unit at the rear.
e. Aperture Plate Holder and Aperture Plates.
(1) Aperture plate holder. The aperture plate holder is a black,
crackle-finish, metal plate with a 9 5/8- inch square opening
that fits over the projection stage. The plate is held in
place at the front of the housing by two captive screws. Cor-
ner stops on the plate are used to position various aperture
plates as required.
(2) Aperture plates. Three aperture plates are furnished with
each projector for the masking of transparencies. One has
an opening of 8 11/16 by 6 11/16 inches, one an opening of 4 11/16
by 6 5/8 inches, and the other an opening of 3 11/16 by 4 5/8 inches.
Each plate is 10 inches square. In addition, a plate with a
7 11/16- by 9 11 /16-inch opening is furnished with the PH-637A/
PFP.
8
TACO 4738B
