Brass thingys

A wee quiz

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A wee quiz with no prize and at the moment no answers. On the SS Explorer sometimes things turn up and sometimes they disappear. The brass devices pictured recently appeared. I don’t know where from and having been volunteering on the ship for ten years and been over every inch of her I should have seen them before.

The question is, what are they?

The smaller one above is a bout six inches long and has a spring loaded latch which retains the brass ring.  

The larger one above is around 12 inches long and again has a spring retained latch. At the top is a small spring loaded pin with a ring to grip it by. A third of the way down is a thumbscrew which doesn’t seem to retain anything.  The large brass section below that swings from the bolt and is restricted from full rotation by the boss which retains the thumbscrew.

If anybody has any idea of the purpose of these devices please let us know.

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