Optical Pointer Assembly

the front of the projector housing are two openings for the blower

assembly and an opening for the optical pointer assembly. The

back of the projector housing is fitted with a hinged door. On the

bottom of the projector housing is an undercarriage (11). The

top portion of the projector housing forms a shelf for mounting

the lens (5) and associated components.

Subparagraph c, heading. Change'' (fig. 5) ''to: (figs. 5 and

5.1).

Subparagraph, heading. Change'' (figs. 8, 13 and 15) ''to:

(figs. 8, 8.1, 13, and 15).

Subparagraph e, heading, Change'' (figs. 4 and 8)'' to: (figs.

4, 4.1,8, and 8.1).

Page 6, paragraph 5. Make the following changes:

Subparagraph f, heading. Change "(figs. 8, 14, and 15)" to:

(figs. 8, 8.1 14, 14.1, and 15).

Add the following subparagraphs:

g.1. Optical Pointer Assembly (AP-5(2)) (figs. 14.1 and 16.1).

The built-in optical pointer assembly collects stray light from the

projection lamp by means of properly located mirrors. The col-

lected light is used to project the image of an arrow on the projec-

tion screen. The arrow image can be used to point out details

anywhere on the projection screen. The optical pointer assembly

includes two mirrors, a lens tube, two convex lenses (projection

lens and collector lens), an aperture plate containing the arrow,

a pointer knob, and a bracket to mount the assembly on the pro-

jector housing.

h.1. Undercarriage Assembly, Still Projector AP-5 (2) (figs.

8.1 and 10.1 ). The undercarriage assembly consists of the blower

assembly ( (1) below), the undercarriage ( (2) below) and the

copy feeding unit ( (3) below).

(1) Blower assembly. The blower assemby includes a motor

mounting, tailpipe, and two blower wheels driven by a

common motor. The blower assembly is in the front of

the projector housing and is fastened to the base of the

projector. An air seal is formed with the orifice plate

of the copy feeding unit when the undercarriage is in

the projection position. The two blower wheels produce

a vacuum effect in the copy feeding unit of the under-

carriage as well as cooling for the lamp chamber.

(2) Undercarriage. The undercarriage contains four paral-

lel arms and a mounting for the copy feeding unit. The

four parallel arms are connected to the base of the pro-

jector and to the mounting for the copy feeding unit by

shoulder screws which act as pivots. The undercarriage

control lever moves the parallel arms, which in turn

AGO 3802B