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Meanwhile, retrieval tools for the latch were
designed and tested in a mockup of the sampler
tube. All the tool shafts had flexible sections
16 Et long to negotiate the two bends in the lf/2-
in. pipe. One noose, one corkscrew, and two
gripper tools wehe tested originally. All the tools
proved capable of grasping a dummy latch, but the
noose tool (Fig. 2.1) gave the most secure grip
and a positive indication when the latch was
snared. After the latch was found to be stuck in
place (see p. 15), the dislodging tool shown in
Fig. 2.1 was developed and proved capable of
greater lateral force and considerable impact.
I
CABLE SHEATH
CABLE BEING NOOSE READY
PUSiHEO OllT FOR FiSIIING
NOOSE TOOL
LATCH RETRIEVAL
TOOL
'/e In
SCHEO 40 PIPE
38
3/4
Later, when the latch became hung in the tube as
it was being lifted with the noose and again while
it was being lifted with the corkscrew, the con-
clusion was that the latch stem was being forced
against the tube wall, causing it to hang. A tool
was then devised that slipped down over the
latch to hold it securely and keep it from hanging
on the way up the tube. This is the third tool in
Fig. 2.1 and the one that eventually brought up
the latch. The tool that was developed to check
the sampler tube for obstiuctions above the latch
stop and to retrieve the capsu1.e is shown last in
Fig. 2.1.
OlSLODGiNG TOOL
ORNL-DWG 67-tt788
STEEL rAPE--dI ,,N~/I~-I~ CABLE
Dl4M h 34/2
MAGNET-
GO- GAGE AND
CAPSULE RETRIEVAI.
TOOL
- -I in. ID
COPPER
--(.375 in DlAPrl
BRASS
Fig. 2.1. Tools Developed 60; Hetrievol of Loach and Capsule from Sample- enricher^