Tool-ex-tract′or.
An implement for recovering from drilled holes broken tools or portions of rods which may have become disconnected and fallen to the bottom.
Two kinds are shown under grab, page 1000.
Others are shown under well-boring tool; and artesian-well, Fig. 384.
In
Fig. 6530, the ratchet-rods catch the tool, and the action of raising presses the rods inward.
Fig. 6531 has a hollow die or screw-socket which taps its way on to the end of a rod in the hole,
[
2594]
and thus becomes attached to it, so as to enable its withdrawal.
