Once upon a time - 35 - 45 years ago - I had the pleasure (sic) of working with:
https://archive.org/details/TNM_Versatec_printers_and_plotters_-_Versatec_a_X_20180227_0009 for temperamental plots of telemetry traces https://www.ebay.co.uk/itm/404623414575 manual for sale EPC Graphic Recorder 1600 Series product data see https://mitmuseum.mit.edu/collections/object/2014.028.0253.01 The "gram writers" https://www.usni.org/magazines/naval-history-magazine/2021/february/66-years-undersea-surveillance probably use a near relative Magic paper, two styli on a belt (one burning, one returning), pour in 1+? bit data and hope to see what you are looking for I built an interface box for an EPC 1600 a few years before the technology was superceeded (by thermal "fax" printers) Both technologies had the great merit of producing long time histories, difficult to store by excellent for analysis Martin -----Original Message----- From: Van Snyder via cctalk [mailto:cctalk@classiccmp.org] Sent: 17 February 2025 21:08 To: cctalk@classiccmp.org Cc: Van Snyder <van.sny...@sbcglobal.net> Subject: [cctalk] Re: Elliott Algol On Mon, 2025-02-17 at 17:35 +0000, Chuck Guzis via cctalk wrote: > > Teledeltos paper had a silver layer over a carbon layer, and a spark > > blew off the silver to expose the black carbon. (I think that's how > > it worked, I haven't seen this stuff in decades!) It was used in > > early machines for sending weather facsimile maps, for instance. I think the printer beside the B220 in the Caltech Boothe computer center was probably mistakenly called a teledotis printer. It definitely deposited soot on the paper, and then thermally fused it. >
