Appeal No. 2005-0948 Page 21
Application No. 09/922,938
comprises a cylindrical housing 17 having a base 18 for securement to the table 15, as
well as to support a drive means for the work head. The housing 17 has removable
closure plates 19 and 20 secured to respective ends of the housing by suitable bolts.
Between the plates 19 and 20 there is oscillatably mounted a hollow spindle 21 which
functions as a support for a collet or chuck 22 for reception of an arbor 23, the other end
of the arbor being supported by the center 12' of the tail stock 12.
Lebermann's spindle 21 is formed with a multiplicity of notches 107 (see Figure 3)
around the periphery inwardly of the arbor supporting end thereof. The closure plate 19
includes a hub 108 having an opening 109 formed therethrough aligned with the notches
107. A cylindrical casing 110 is secured to the hub and has mounted therein a
spring-pressed plunger 111. The plunger 111 being spring urged maintains the plunger
in engagement with a notch 107 of the spindle holding the same against rotation. In such
position of the plunger 111, an indexing disk 60 may be removed and a different indexing
disk installed. The casing 110 is formed in two parts 112 and 113 each having a
complemental shoulder 113'. When a new indexing disk is secured to the spindle 21, the
plunger 111 is raised against the tension of the spring of the plunger and part 112 of the
casing is given a half turn so as to disengage the shoulders 113'. The plunger 111 is
thus held in a retracted position which releases the spindle 21 for operation of the
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Last modified: November 3, 2007