Upside down IIIg

[Peter A (NYC)]

I just realized that my IIIg shutter works perfectly all the time except on 1 sec WHEN THE CAMERA IS HELD UPSIDE DOWN! Then, it sounds like a 30th sec. Half-sec etc are fine, just the 1 sec setting. And only when precisely upside down, not at an angle! I'm not too worried about this, just curious. Anyone know what is going on here? Thanks

 

[aad]

I just wonder how you noticed.

 

[Peter A (NYC)]

I just wonder how you noticed.

I was looking at those gears that you can see when you pull out the film spool, and it happened to be set at 1 sec...

 

[xayraa33]

The slow speed escapment pawl is all the way in at 1sec. for max. resistance that the 2nd curtain has to overcome for this 1sec. shutter speed.
if the gear train in the escapment is dirty, the slow speeds will stick, the 1 sec uses a different part of the escapment geartrain than say 1/15 of a sec, different sections are activated by a pallet arm.

The upside down thing at 1 sec. could be that the slow speed escapment pawl loses contact with the second shutter curtain cam when the cameras is upside down and the shutter speed reverts to the curtain running time (1/50 of a sec.) "or"
The slow speed dial cam is not setup properly to give the right slow shutter speeds.

a good CLA should cure this.

 

[Peter A (NYC)]

It does sound like 1/50 sec rather than the 30th that I said originally. I just got the camera back from Youxin Ye and it is performing amazingly, so I thought the upside down anomaly might actually be normal.