If the hole is slightly large or the retaining will not hold
the shutter tightly try wrapping a turn of black wool yarn around
the shutter barrel on the inside and clamping the retaining ring
over it. A ring of felt will also work but is harder to make.
Many folding cameras had shutters mounted using felt washers. It
works fine and will block any light leaks.
On 4/25/2019 1:18 PM, mark@xxxxxxxxxxxxxxxxxx wrote:
Mine is the second type. The retaining ring looks identical to what shows up on the link. I am glad to hear the Copal shutter wrench is just a stamped piece. I think I have it tight enough now not to spin, but found a few things. The 42mm hole saw may have made a hole slightly larger than 42mm. My micrometer read 42.5, which for me isn't bad, but there might be a bit of variation in the hole.
The other is I think it just was not tight enough. A finger nail seems to have done the trick for now. Not sure it will hold, but then again I could find this isn't for aging eyes. Before I start spending ham radio money on this, I would like to know I am up to the task. What I have now should tell me that. It might be a pain, but the one thing I do not want to happen is to wonder if I could have done it, and never know.
I might try and fail, but that is ok. Yet I think there is some way to make this work. So far, so good.
-------- Original Message --------
Subject: [pure-silver] Re: large format photography books
From: `Richard Knoppow <dickburk@xxxxxxxxxxxxx
<mailto:dickburk@xxxxxxxxxxxxx>>
Date: Thu, April 25, 2019 2:12 pm
To: pure-silver@xxxxxxxxxxxxx <mailto:pure-silver@xxxxxxxxxxxxx>
See:
http://skgrimes.com/products/spanner-wrench
I have both kinds of adjustable spanners, i.e. pin tip and
slot tip.
Its not too difficult to make a spanner for slotted rings
using a sheet of brass and cutting it to form two tips. Can't
slip.
At the top of this page is a picture of a slotted retaining
ring, is this what you have?
S.K.Grimes also repairs Copal shutters and offers a lens
mounting service.
The locking screws were used on press camera when it was
common to use solenoid type flash synchronizers. The
synchronizer
was screwed to the lens board and had to have a precise relation
to the shutter so it was common to fix the shutter position by
having a small screw head project from the back which fitted
into
a hole or pit on the lens board. Thin sheet metal boards like
the
ones used on Pacemaker series Speed and Crown Graphics might
have
a hole but some just had a dimple made with a punch. You do not
need either to mount the shutter.
As I described before there are two kinds of holders for
shutters: first is a flanged ring. These usually are held on the
front of the lens board with screws. The second kind are
retaining rings of the sort shown in the photo cited above.
These
go in back of the lens board. In some cases a flanged retaining
ring was supplied which could go on either side. I have a couple
of Kodak Lenses on old style thick wooden Speed Graphic boards
which are mounted on the back and also screwed in.
The lock screw on the shutter was a short "cheese head"
screw, at least on Kodak shutters and old Compur shutters, its a
standard hardware part. It is NOT necessary and if your shutter
does not have one I would just forget about it. If you MUST have
one write Steve Grimes shop, they will have the part.
I had a lot of correspondence with Steve when he was alive
and we also spoke via phone several times. He was so successful
that he had to hire assistants, whom he trained. They took over
the business after he died.
You can also ask them about mounting your shutter for you. I
have no idea how much they charge but its skilled hand work so
don't expect it to be cheap.
On 4/25/2019 8:09 AM, mark@xxxxxxxxxxxxxxxxxx
<mailto:mark@xxxxxxxxxxxxxxxxxx> wrote:
> I get that I need the wrench for the best fit, but would such a > wrench still be available for a camera that's been out of > production this long. Granted the Copal 1 shutter might have > been used later, but can't imagine they are a dime a dozen these > days. Well it turns out there are a couple of types on Amazon, > one for DLSRs and the one for large format are specifically > labeled copal 0 1 and 3. It might solve the problem. Looks like > a card more than a wrench.
> > I did find a serial number on the copal 1, but no screw. I did > find a tiny hole that was covered by the retaining ring/jam nut > that might be threaded. As many of you suspected this probably > was the set screw that others have talked about, and thought was > most likely gone. It is, and at that size a replacement would > probably be the infamous wish upon a star. Even if I found the > screw, unless it was a very tiny screw with a very large head, it > would have to be put through the lens board itself
> > The serial number is in the 7300 range, but found no reference to > how old it might be like one can often do with some cameras.
> > The process continues.
Richard Knoppow
dickburk@xxxxxxxxxxxxx <mailto:dickburk@xxxxxxxxxxxxx>
WB6KBL
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