Figure 1-4. Copy camera, darkroom view with door closed

b. Camera Back Assembly. The camera back assembly

is part of the darkroom end of the copying camera, consisting

of the camera back housing (5, fig. 1-3), the focusing glass (2,

fig. 1-3) and its details. The main structure of the camera

back assembly is the camera back housing, which supports

the vacuum back assembly (1) and the back support plate (9).

The back support plate is attached to the lower section of the

housing, and bears the lensboard and copyboard drive motors

(6 and 8, fig. 1-4), counters (3), and the darkroom end of the

camera drive mechanism. The focusing glass (2, fig. 1-3) and

its adjacent parts are connected to the housing by a hinge

bracket (4) and a counterbalance arm (3), one at each upper

corner of the housing frame. The side channels of the

housing secure the spring counterbalances (8) and chains (6)

of the focusing glass.

Figure 1-4. Copy camera, darkroom view with door

closed.

c. Vacuum Back Assembly. This assembly (2, fig. 1-4)

is hinged to and supported by the camera back housing, and

consists of a door with a porous suction plate on the inner

side and a vacuum back plate on the outer side, having

attached to it an aluminum-cast vacuum back valve housing

(1) with a valve handle (13). A flexible rubber hose (12)

extending through the back support plate is clamped to the

vacuum back valve housing.

Figure 1-3.

Copy camera, darkroom view with

vacuum back open.

d. Bellows Assembly. The bellows assembly (1, fig. 1-

1) is the rubberized fabric connecting the lensboard (4) and

the camera back (12). It is expandable and end-framed for

mounting to the adjacent components. The tube support

assembly

1-3