How To remove shutter plate on a Marion Reflex

[kamphotog]

Hi,
In order to thoroughly clean the shutter mechanism, I'd like to remove the shutter plate from the camera body on a Marion 3x4 SLR but there is the speed knob that prevents that.

I could not see any set screw on the rim of the knob.

The knob is the one top left on the attached picture.

Thanks and have a nice day,
Kam

 

[shutterfinger]

post some pictures of the sides of the knob, top, bottom, left, right. and the opposite side of the camera at the same position.

 

[kamphotog]

post some pictures of the sides of the knob, top, bottom, left, right. and the opposite side of the camera at the same position.

Hi,
Thanks for your interest...
Here are some additional pictures.
The knob can be pulled (a bit) to disengage some gear and change the shutter speed/slit width. But it is afixed to the top roller axle.
The shutter mechanism is exactly the one described here (left photo/early version of the shutter mechanism) :
http://www.earlyphotography.co.uk/site/shutterm.html#Kershaw
On the other side of the camera, is the speed display mechanism.
Have a nice day,
Kam

 

[Ed Sawyer]

Probably comes out with the shaft, see if you can uncouple the far side and pull out the whole shaft?

 

[kamphotog]

Probably comes out with the shaft, see if you can uncouple the far side and pull out the whole shaft?

Thanks.
That would be quite a pain because I would need to detach the ribbons (the other side is not an issue).
I supposed it could be done without removing the shaft because it says so in the description of the shutter (the link above). But I'll bow to reality...
Thanks again for your time and help,
Kam

 

[shutterfinger]

Thanks for the additional pictures but they're not much help.
http://camera-wiki.org/wiki/Soho_Reflex shows this type of camera was made from 1905 until 1940.
Knobs were attached in one of two ways usually, the center comes out then a nut or screw holds it to the shaft or a pin goes through the center of the shaft and the small protrusion of the knob. Taper pins were used at first then when roll pins were developed they were used.
I've seen cases where the paint/finish on the knob hid the pin. Careful feeling along the edge close to the body will reveal the pin if it exists. Taper pins are larger on one end, go in and come out one way only. Pins fuse in place and have to soak in penetrating oil for a few hours to a few days before they can be driven out. Use a drive/pin punch and hammer to drive the pin out with a support under the knob to prevent the shaft from bending.
There is a third possibility, the knob screws onto the shaft and is sealed by threadlocker. If threaded it may be left hand thread, anti clockwise in Europe.

 

[Ian Grant]

Kam, why don't you email Robert through his earlyphotography.co.uk website, he's obviously dismantled Soho Reflex cameras.

Ian

 

[kamphotog]

Thanks for the additional pictures but they're not much help.
http://camera-wiki.org/wiki/Soho_Reflex shows this type of camera was made from 1905 until 1940.
Knobs were attached in one of two ways usually, the center comes out then a nut or screw holds it to the shaft or a pin goes through the center of the shaft and the small protrusion of the knob. Taper pins were used at first then when roll pins were developed they were used.
I've seen cases where the paint/finish on the knob hid the pin. Careful feeling along the edge close to the body will reveal the pin if it exists. Taper pins are larger on one end, go in and come out one way only. Pins fuse in place and have to soak in penetrating oil for a few hours to a few days before they can be driven out. Use a drive/pin punch and hammer to drive the pin out with a support under the knob to prevent the shaft from bending.
There is a third possibility, the knob screws onto the shaft and is sealed by threadlocker. If threaded it may be left hand thread, anti clockwise in Europe.

Thanks for your leads.
This one was assembled on september 13, 1912, as per the writing on the mirror cage.
I'd rather have confirmation of which assembly was used, as following the wrong lead can damage the knob...
But knowing that, I'll double-check if I can see something upon closer inspection.
Many thanks !
Kam

 

[kamphotog]

Kam, why don't you email Robert through his earlyphotography.co.uk website, he's obviously dismantled Soho Reflex cameras.

Ian

Thanks Ian, Will do...
Kam

 

[shutterfinger]

This one was assembled on september 13, 1912, as per the writing on the mirror cage.

Taper pin, tap out from the small end, threaded on, screw or nut under the cap, pressed on? The cap edge will be at the junction close to the outer edge where the recess or raised portion is.
Ian's suggestion the best.

 

[kamphotog]

Taper pin, tap out from the small end, threaded on, screw or nut under the cap, pressed on? The cap edge will be at the junction close to the outer edge where the recess or raised portion is.
Ian's suggestion the best.

Thanks. I sent an email to Robert...