Browse Prior Art Database

Heat Sealed Memory Plane

IP.com Disclosure Number: IPCOM000091351D
Original Publication Date: 1968-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 56K

Publishing Venue

IBM

Related People

Karr, PC: AUTHOR [+3]

Abstract

Ferrite core memory arrays are usually made up of a stack of memory planes, each of which includes a frame which mounts a mat of cores suspended on an X-Y grid of wires. Frequently a sense wire is utilized in addition. This wire is usually threaded through the cores in a more tortuous fashion than the primary X-Y wires.

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Heat Sealed Memory Plane

Ferrite core memory arrays are usually made up of a stack of memory planes, each of which includes a frame which mounts a mat of cores suspended on an X-Y grid of wires. Frequently a sense wire is utilized in addition. This wire is usually threaded through the cores in a more tortuous fashion than the primary X-Y wires.

Frame 10 is of thermoplastic material and is configured to have two subframe portions 12 and 14, having a midbar 16 in common, for mounting the two halves of a plane. Locating fixture 18 is provided with pins 20 and 22 and combs 24 and 26 which are insertable through preformed openings 28, 30, 32, and 34 in frame
10.

The sense wire, preloaded with cores, is strung on the fixture-frame combination as indicated at 36, passing around the pins and following an offset through the teeth of the comb to provide the desired tortuous pattern. Then a hot tool 38 is brought down over the assembly to soften the thermoplastic material of the frame 10 locally and to press the sense wire into the same in regions near the pins and comb teeth. After tool 38 is withdrawn, the thermoplastic material cools and hardens, retaining the wire in place after fixture 18 is withdrawn.

By further steps of similar nature, not shown, the X and Y wires can be heat- sealed to frame 10 after being threaded. Thus, the method provides a wiring configuration which is entirely fixture-determined and which requires no welding pad inserts or the like in the frame...