I have posted about this before and tried numerous possibilities. Here's a new thought, after having had to shoot with the camera aimed well downwards the other day and having the right-hand cam open completely from the pressure, unbeknownst to me until a two exposures had been made.
What sort of liquid might be applied to the cam and upper washer surfaces to increase friction under pressure? I could live with having to reapply it if it would last for even a day's shooting.
For those unfamiliar with the camera, the cam is solid brass, the stainless steel washer is 0.2 mm thick.
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