Dimond ring
A Dimond ring or Dimond ring translator was an early type of computer read-only memory, created in the early 1940s by T. L. Dimond at Bell Laboratories for Bell's #5 Crossbar Switch, a type of early telephone switch.[1][2][3]
Structure
[edit]Large-diameter magnetic ferrite toroidal rings with solenoid windings, through which are threaded writing and reading wires.
Uses
[edit]It was used in the #5 Crossbar Switch and TXE (prior to version 4) telephone exchanges.
See also
[edit]- Core rope memory, a later development
References
[edit]- ^ R. J. Chapuis and A. E. Joel Jr., 100 Years of Telephone Switching, part 2: Electronics, Computers and Telephone Switching (2nd. edition), p. 33, IOS Press 2003.
- ^ T. L. Dimond. "No. 5 Crossbar - AMA Translator" (PDF).
- ^ Phil Ryals. "Dimond Rings and Read-Only Ropes".
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