f. Carrying Case. The carrying case is a square, wooden,
leatherette-covered box with reinforced metal corners. A hinged
cover opens at one side ; there is a sturdy, leather-covered handle
at the top; and the bottom rests on rollers. Inside the case are com-
partments that hold all components of the projector. The head-
support post is held in the cover by wooden locking strips. The
housing, projection head assembly, projection lamps, aperture plate
holder, aperture plates, power cable, roll attachment (PH-637/PFP
only), and cellophane or plastic roll are packed in compartments in
the body of the case.
g . S t a n d . The stand (fig. 2)
to support the projector
so that the writing surface is 30 inches above the floor (or ground),
and is suitable for operation while the operator is sitting. The stand
is made of aluminum and steel and has a top frame into which the
main projector housing fits. A shelf that holds four compartments
for copy storage is riveted to the bottom of the stand. The two front
legs are provided with leveling screws. The stand is provided only
with some procurements of the PH-637A/PFP.
6. Technical Characteristics
Type- - - - - - - - - - - - - - - - - - - - - - - Overhead, transparency.
Projection lamp ------------------500-watt; PH-637/PFP only. 1000-watt; PH-
Projected image---------- From 32 by 32 inches at 4 feet to 102 by 102
inches at 14 feet (using 10 by 10-inch
Blower motor -----------------------115-volt, 60-cycle, 3,050 revolutions per minute.
Power supply--------------------- 115- to 120-volt, 60-cycle ac.
Projection lens----------------- 14-inch effective focal length.
Lumen output of lamps 500 watts, 900 lumens. 1,000 watts, 1,200
when used with projec-
7. Additional Equipment Required
To project material satisfactorily, a projection screen is required.
Any type of beaded or semimatte screen may be used. A flat, light-
colored wall surface will give fair results if no screen is available.
8. Packaging and Packing Data
a. Domestic Shipment. The components of Projector PH-637(*)/
PFP (less stand) are placed within their designated compartments in
the carrying case (fig. 5). The voids within the case are packed thor-
oughly with neutral cellulose wadding to prevent movement of the
parts. The cover of the carrying case is closed and secured with its
two fastenings. The carrying case then is cushioned at each corner
and at the top and bottom with fiberboard inserts and is placed within