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Lenaerts Notebook 45 (8 July - 2 Nov 1965)
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Notebook kept by Ernest Lenaerts during his work on the LEO computer. Includes entries: NB45-001: Front cover
NB45-002: July 8 1965: Kodak microfiche
NB45-003: Microfiche pros and cons
NB45-004: July 14 1965, paper conductivity tests
NB45-005: Paper conductivity; measurements, source of errors
NB45-006: July 15 1965,paper measurement averages, tape samples
NB45-007: 3M's microfiche reader, Johnson Matthey
NB45-008: July 16 1965,printing costs, static at [Waterlows A1], paper recommendations
NB45-009: [autolector]
NB45-010: July 22 1965, measurements on paper, conductance, abrasiveness
NB45-011: Post Office noise control
NB45-012: Tender to GPO for noise control work
NB45-013: July 29 1965 and July 30 1965: improvements to library, measurement room humidity control
NB45-014: July 31 1965, controlling humidity in paper tape conductivity experiments
NB45-015: Ribbon materials, Rowe visit to Mr Pinkerton, Baldwin samples of [?]
NB45-016: August 3 1965, work on acoustics room, LEO III s temperature and ventilation
NB45-017: Resistance measurements, tyres,
NB45-018: August 4 1965, improvements to measurements room, continuing problems with paper conductivity measurements
NB45-019: Paul Cooper ribbon measurements, acoustics tests with Watkins and Watson equipment
NB45-020: August 6 1965, tool and materials for cottage DIY
NB45-021: conductivity of [Waterlows] paper, P Abbot [punch] tape resistance
NB45-022: Wear caused by ribbon
NB45-023: August 16 1965, disc method for wear, calculating consumption of cards and tape at HH
NB45-024: August 17 1965, Columbia Ribbon and Carbon, abrasiveness of silt and nylon ribbon
NB45-025: Ribbon abrasion tests cont.
NB45-026: Memorex tape vs 3M 499 tape, phone Beconsfield about conductivity
NB45-027: August 23 1965, workshed at cottage, fences, grass mowing
NB45-028: Order to Electronics (Croydon ) Ltd, memo on Memorex tape
NB45-029: August 24 1965, audiometer room design and materials
NB45-030: August 25 1965, audiometer room cont.
NB45-031: Controlling humidity for samples in conductivity tests
NB45-032: August 26 1965, photos of printer [simulator], abrasiveness of silk nylon or paper
NB45-033: August 27 1965, paper conductivity and humidity
NB45-034: Abrasiveness of lithographic ink ribbon, noise level table ref.
NB45-035: August 31 1965, more work at cottage, visit to Kidsgrove
NB45-036: Problems during wear testing overcome
NB45-037: September 1 1965, Kidsgrove tape measurements, IBM double density tape
NB45-038: September 1 1965, Columbia ribbon, nylon and mylar, queries to Ampex, California
NB45-039: September 2 1965, ribbon complaints from Customs and Excise, Royal Bank of Scotland complaints about Memorex tape, Ampex suggestions
NB45-040: Report on tape properties to Potter
NB45-041: September 6 1965 or September 7 1965, ribbon, programming courses
NB45-042: September 7 1965, samples of [A1] antistatic
NB45-043: Ribbon tests progress
NB45-044: Points to discuss with ribbon manufacturers
NB45-045: September 13 1965, photographs of ribbon testing, parcel from Australian Computers
NB45-046: More ribbon test problems
NB45-047: Materials and plants for cottage, wear measurements
NB45-048: Stylus for wear tests, extension tube for camera
NB45-049: Per annum media [paper etc.] costs, measurements of ribbons
NB45-050: September 20 1965,EELM ribbon standards, planning permission for noise room not granted
NB45-051: Testing ribbon mesh vs print clarity
NB45-052: September 21 1965, audiometry room requirements, HMSO printer simulator
NB45-053: September 21 1965, building requirements [for audiometry room ?], printer ribbons
NB45-054: Ink properties, ribbon manufacturing processes
NB45-055: Ribbon manufacturing and quality control cont.
NB45-056: Ribbons, inks, thread count and ribbon thickness
NB45-057: Ribbon samples from Caribonum
NB45-058: September 22 1965 and September 23 1965, question about Pelican printer ribbons, question about gold plating
NB45-059: October 6 1965, 'to do' list, list of printer simulators
NB45-060: Declines to be advisor on [printer simulator tests]
NB45-061: October 8 1965, estimates for building a printer simulator
NB45-062: October 11 1965 and October 12 1965,progress on printing, mylar shedding from tapes
NB45-063: October 13 1965, conductance testing of ribbons, visit to NEL
NB45-064: [audiometry room], polyply paint
NB45-065: October 18 1965, noise from KD peripherals, printer ribbons
NB45-066: October 19 1965, damaging effects of noise
NB45-067: Noise affecting mistakes and motivations
NB45-068: Boiler noise, tackling noise
NB45-069: Noise measurements, from printers (impact noise)
NB45-070: Noise; bearings and gears
NB45-071: Route to Melton Mowbury, spool to spool wear on magnetic tape
NB45-072: October 22 1965, imaging tape surface
NB45-073: Tyre prices, contacting Shell plastics advisory service
NB45-074: Miss M.A. Hines cv, problems with spool to spool tape
NB45-075: Wear tests on magnetic tape
NB45-076: [tape surface measurements]
NB45-077: October 30 1965,visit to Ron Purvis at Kidsgrove, [roughness measurement]
NB45-078: Surface roughness; calculating CLA
NB45-079: Printer ribbon wear; weight, materials, thread count
NB45-080: November 2 1965, meeting with Tullis Russel, magnetic tape wear measurements
NB45-081: November 2 1965, visit from Clark of [Kado], proposal to visit ribbon factory
NB45-082: Upside-down expenses section, July - October 1965
NB45-083: Back cover
Date : 8th July 1965 to 2nd November 1965Physical Description : 1 bound volume (83 pages), paper; manuscript Provenance : Archive References : CMLEO/EL/NB/45 , CCH LI 57 This exhibit has a reference ID of CH76478. Please quote this reference ID in any communication with the Centre for Computing History. |
 
This document has been scanned and is available to view online.
Copyright Ernest Lenaerts File Size: 95.80 MB
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