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4.1 Transfer Fork
Two lengths of transfer fork are available for attachment to the WS50/120/182/240 wobble sticks.
These forks (see figure 3) are designed for transfer systems which employ the standard VACGEN
ESCA sample stubs. The transfer forks incorporate a locking spring which prevents samples being
dropped from the fork during transfer. The fork is held in place by means of the grub screws in the
end of the wobble stick.
4.2 Retractor Cradle
Standard wobble sticks have a parking plate which is designed to 'lock’ the wobble stick motion when
the device is not being used. The parking plate locks over the wobble stick shaft and prevents the
wobble stick being 'sucked' into the vacuum chamber under the action of external atmospheric
pressure. Some transfer applications require that the wobble stick be 'parked' in such a manner that it
is fully withdrawn from the vacuum chamber. If this is the case a retractor cradle (see figure 4) should
be fitted; this cradle holds the wobble stick in the fully withdrawn position when it is not in use. The
cradle is simply attached to the bolts on the wobble stick mounting flange; the parking plate and
parking plate bush should be removed when fitting the cradle assembly.
Figure 3 - Sample transfer forks
Figure 4 -Retractor cradles
