Re: Aristo cold head


"john" <x@xxxxx> wrote in message
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"Richard Knoppow" <dickburk@xxxxxxxxxxxxx> wrote in
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"john" <x@xxxxx> wrote in message
Does your Saltzman have one or two support rods for
the bellows?

It has two, Richard, with the worm-drive rod between
them, driven by a sintered bronze gear. I can make
pictures to put online if you wish.

John

You have the more elabrorate version of the enlarger.
The cheaper (but not cheap) one had the single support
rod. This type was also used for aerial mapping and
similar applicatons. It should have a focusing wheel to
drive the bellows. Some of the larger models also had a
small handwheel to operate the stop ring on the lens.

This one has two hand-wheels below the baseboard. One
raises and lowers the head assembly using two chains that
run up and down the inside of the main column, and the
other wheel moves the bellows (focus). It has another
pair of smaller hand-wheels on the horizontal supports (of
the triangulated head support) to move the head to and
fro. Today I am measuring those parts to see if I can add
a belt or lightweight chain drive from one of the smaller
wheels to drive the other: this would allow the operator
to move to-fro using one wheel and obviate having the
enlarger sit 30 inches from the wall. (Or a person could
just disengage the worm-screw and push/pull by hand.)

I would very much like to work out a remove F-stop
control. Will think about it.

There are mounts for other things such as the red filter
rod which are empty right now. And an odd part that I
cannot figure out. If I can get a digital snapshooter I
will make some pictures and post the address.

The filter rod was also used to hold the shutter. The
original was a two blade arrangement similar to a Packard
shutter worked by a foot pedal. Not all had the iris control
and I don't know the details of how it was coupled.
One option was a condenser lamphouse with about 14"
condensers and a mirror arrangment for the lamp. These had a
focusing control for the lamp on the housing and its
possible some had a remote handwheel for this also. I wish I
could find my catalogue but it got boxed up. Time for some
garage cleaning I'm afraid.
You probably need a five foot ladder to go along with
the enlarger.
Saltzman also made a very heavy, geared, tilting
baseboard for perspective correction. I've only seen
pictures of these.

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Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx


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