Browse Prior Art Database

Core Sorter

IP.com Disclosure Number: IPCOM000097248D
Original Publication Date: 1962-Aug-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 77K

Publishing Venue

IBM

Related People

Larson, HA: AUTHOR

Abstract

In the manufacture of ferrite cores for magnetic memories, it is important that the thickness of these cores be held to a certain dimension. A method to secure this result uses this sorter or grader which removes all oversize cores from the output. It comprises a base 10 having a circular aperture 11 in it. Mounted in bearings 12 in the base is a shaft 14 on which is secured a pair of carbide discs 15 and 16 and a pulley 17 by which the shaft is rotated. The disc 15 is located in the aperture 11 with its upper surface slightly below the surface of the base 10.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 80% of the total text.

Page 1 of 2

Core Sorter

In the manufacture of ferrite cores for magnetic memories, it is important that the thickness of these cores be held to a certain dimension. A method to secure this result uses this sorter or grader which removes all oversize cores from the output. It comprises a base 10 having a circular aperture 11 in it. Mounted in bearings 12 in the base is a shaft 14 on which is secured a pair of carbide discs 15 and 16 and a pulley 17 by which the shaft is rotated. The disc 15 is located in the aperture 11 with its upper surface slightly below the surface of the base 10.

The disc 15 has a boss 18 formed on it that is slightly thicker than the plates 20 and 21 which are secured to the base by screws passing through a cover member 22. This boss engages the underside of disc 16 and separates the two discs by an amount equal to the maximum allowed thickness of a core. The cover member is formed with a circular aperture 23 to freely accommodate the disc 16.

This disc is formed with a groove 24 that is greater in depth than the thickness of the cores being tested. A groove 25 in the cover 22, a groove 26 in the base and the space 27 between plates 20 and 21 form a passage for accepted cores leaving the apertures 11 and 23 and conducts them to a vacuum outlet tube 28. A chute 30 conducts the cores to the base 10.

A vacuum drawn through tube 28 forms an air stream that pulls a normal core between the lip 31 of disc 16 and the surface of disc 15 which in rotating carries...