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Indexing Mechanism

IP.com Disclosure Number: IPCOM000093280D
Original Publication Date: 1967-Aug-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Underwood, FO: AUTHOR

Abstract

This electromechanical mechanism is for incrementing an element in discrete steps in opposite directions. Electromagnetic transducer element 10 is located adjacent to a track on magnetic record surface 12 of disk 14 having molded concentric ridges and grooves effecting a rack 16 near the center of disk 14. Transducer 10 and detent 20 are fixed on magnetic armature member 22 and are spring-urged toward disk 14 so that detent 20 rides in a groove of rack 16 for maintaining transducer 10 in place.

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Indexing Mechanism

This electromechanical mechanism is for incrementing an element in discrete steps in opposite directions. Electromagnetic transducer element 10 is located adjacent to a track on magnetic record surface 12 of disk 14 having molded concentric ridges and grooves effecting a rack 16 near the center of disk
14. Transducer 10 and detent 20 are fixed on magnetic armature member 22 and are spring-urged toward disk 14 so that detent 20 rides in a groove of rack 16 for maintaining transducer 10 in place.

Two electromagnets 24 and 26 are fixed with respect to each other and to the center of rotation of disk 14 beneath armature 22. Electromagnets 24 and 26 are spaced on either side of intermediate electromagnet 28 by distances substantially equal to one half of the pitch P of rack 16. Electromagnet 28 is arranged, by devices not shown, to be movable laterally between the fixed electromagnets 24 and 26 and is resiliently urged centrally between 24 and 26.

In order to step transducer 10 inwardly. energy from source 30 is first applied to electromagnet 24 by closing switch 32. This attracts electromagnet 28 outwardly where it is held in place while switch 34 is closed to attract armature 22 downwardly. This holds the armature to electromagnet 28 and releases detent 20 from rack 16.

Then switch 32 is opened and switch 36 is closed to release electromagnet 28 and the now attendant armature 22 from electromagnet 24 and to attract them inwardly to electromagnet 2...