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Two-Coordinate Positioning Device

IP.com Disclosure Number: IPCOM000097829D
Original Publication Date: 1961-Aug-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Bardo, GB: AUTHOR

Abstract

The mechanism accurately positions a movable element in a twocoordinate plane.

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Two-Coordinate Positioning Device

The mechanism accurately positions a movable element in a twocoordinate plane.

A movable plate 10 mounting crosshair assembly 11 has projecting mounting members 12. The opposed pairs of members 12 are each spanned by circular racks 13 having a fine pitch. Racks 13 are journalled in members 12 by bearings
14. A pair of racks 13 is disposed on each side of movable plate 10 and these pairs are normally related with respect to each other.

One pair of racks 13 is engaged by driving pinion 15. Pinion 15 is mounted on drive shaft 16 which is journalled by bearings 17 in stationarily mounted support member 18. Pinion 15 extends transversely with respect to the pair of racks 13 associated with it.

A second driving pinion 19 is disposed normally to and engages the other pair of racks 13. Pinion 19 is mounted on drive shaft 20 which is rotatably supported in stationarily mounted support member 21.

Rotation of shaft 16 moves plate 10 and crosshair assembly 11 in one coordinate direction. As plate 10 moves, the pair of racks 13 associated with shaft 20 roll axially along mating pinion 19. Rotation of shaft 20 results in a similar action and movement of the plate in the other coordinate direction. Movement of plate 10 in both coordinate directions can be effected simultaneously. The means for moving and the supporting means for the movable plate are supplied by the same mechanical elements and the drive shafts 16 and 20 are stationary.

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