Appeal No. 2005-0948 Page 12
Application No. 09/922,938
14. The bed section 14 is generally similar in cross-sectional shape to portion of the
cross-sectional shape of the bowl turning attachment 13 as illustrated in Figure 4.
For the purposes of transferring McCormack's bowl turning attachment 13 quickly
and easily from the head end of the headstock base 11 to the tail end of the bed section
14, there is provided a keyhole clamping device generally designated 20 in Figure 5. The
keyhole clamping device 20 comprises a spindle 21 rotatable in a depending web 22 of
the attachment 13, one end projecting outwardly and terminating in a rectangular locking
bar 23 and the other end being carried by a plate 24 which depends from the underside
of the upper portion of the attachment 13. The plate 24 is provided with a part-circular
groove 25 (Figure 4) and this limits rotation of a knob 26 due to a pin 27 being movable
only for the length of the groove 25 as the knob 26 is rotated.
Gray's invention relates to the form of axle-lathe having a "dead center" at each
end, the axle being revolved by direct connection with the driving mechanism. As shown
in Figure 1, a lathe-bed (A) is fitted with two sliding blocks (B, B') which carry the dead
centers (C, C') upon which the axle (D) revolves. The bed is fitted with two carriages (E,
E') carrying the cross-sliding tool-rests (F, F'), the carriages being moved longitudinally by
power with screw (G), or by hand with hand-wheels (H). A central block or carriage (I) is
fitted to the bed of the lathe in which is journaled a hollow shaft (J), through which the
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