Lock plate adjustment for geneva drive mechanism
AssigneeKingsbury, Inc.
InventorsRichard L. Whipple, Larry W. Forbus
Life of this patent
Estimating the term…
Abstract
A machine tool has a rotatable table with a plurality of lock plates located on the underside thereof at circumferentially spaced locations, and a geneva drive mechanism arranged to coact with the lock plates in rotatably indexing the table. The lock plates are shiftable with respect to the table by means of cooperating pairs of rotatably adjustable eccentric pins. Machine screws releasably fix the lock plates at selected positions of adjustment. The lock plates are shifted and releasably fixed from above the table.
Claims10
A machine tool having a rotatable table with a lock plate located on the underside thereof at at least one of a plurality of circumferentially spaced stations, and a geneva drive mechanism arranged to coact with said lock plate in the rotational indexing of said table about a central axis, the improvement comprising:
- a pair of mutually spaced first and second locating pins at the said at least one station, said first and second locating pins being rotatable about axes fixed with respect to said table and being provided respectively with first and second eccentrics, said first and second eccentrics being out of phase with respect to each other and being journalled for rotation in said lock plate;
- adjustment means for rotating said first locating pin and its said first eccentric to shift said lock plate in relation to said table, the shifting of said lock plate being accommodated by a reactionary rotation of said second locating pin and its said second eccentric;
- and
- securing means for releasably fixing said first and second locating pins against rotation and said lock plate against shifting with respect to said table.
Dependencies are inferred from the claim text.