David W.E. Roberts submitted this idea :
Hi,

I was told many years ago about a tool for removing nails (not a claw
hammer).

Apparently you drove a shaft with a grasping end down over the nail; it
gripped the nail and you could then haul it out.

As I recall they were made from three lumps of metal....

The main body with one half of the princer jaws. A slide hammer - which
slide in the main body to allow you to hammer the jaws into the wood.
The other half of the jaw, which pivoted again the other one on the
main body, which had an arm to allow you to close the jaws/acted as a
lever to prise the nail out.

Any company which has to open lots of heavy wooden packing cases will
them.

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Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk