Browse Prior Art Database

Photo Commutator

IP.com Disclosure Number: IPCOM000092888D
Original Publication Date: 1967-Mar-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Lundell, DR: AUTHOR [+2]

Abstract

This commutates a discontinuous signal between a fixed and a rotating member. Head 1 is mounted for clockwise rotation and is provided with four magnetic heads 2...5 evenly spaced about the periphery. Sets 6 and 7 of three photosensors are mounted on an end surface of drum 1 and are arranged on a diameter of such drum. Stationary disk 8 is mounted adjacent drum 1 and has sets 9 and 10 of three lights arranged on radii of the disk at 90o to each other. The light sources and photosensors are positioned so that immediately prior to any one head entering a recording area, e. g., quadrant A, one set of light sources is aligned with a set of photosensors. By energizing one or more lights according to a binary code, any of the four heads can be energized immediately before it enters the recording area for read or write purposes.

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Photo Commutator

This commutates a discontinuous signal between a fixed and a rotating member. Head 1 is mounted for clockwise rotation and is provided with four magnetic heads 2...5 evenly spaced about the periphery. Sets 6 and 7 of three photosensors are mounted on an end surface of drum 1 and are arranged on a diameter of such drum. Stationary disk 8 is mounted adjacent drum 1 and has sets 9 and 10 of three lights arranged on radii of the disk at 90o to each other. The light sources and photosensors are positioned so that immediately prior to any one head entering a recording area, e. g., quadrant A, one set of light sources is aligned with a set of photosensors. By energizing one or more lights according to a binary code, any of the four heads can be energized immediately before it enters the recording area for read or write purposes.

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