Lenaerts Notebook 42 (8 Apr - 14 Sept 1964)

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Notebook kept by Ernest Lenaerts during his work on the LEO computer.

Includes entries:

NB42-001: Front cover

NB42-002: April 8 1964, Eastcote, dust in ducts

NB42-003: To do - air sampling, sprocket hole strength, ribbons, noise

NB42-004: List of sources of noise

NB42-005: Shell and BP meeting, measuring noise

NB42-006: Composition of dust,

NB42-007: April 14 1964, visit Shell BP , discussed humidity, dust, printers

NB42-008: April 16 1964, discussion with MMP on research and environment

NB42-009: May 5 1964, Packer arm trouble, uses for LEO 1

NB42-010: May 5 1964, packer arms to Eastcote for testing, deficiencies of spring balance tension gauge

NB42-011: May 11 1964, arm testing cont., printer simulator related to analex printer

NB42-012: May 11 1964, paper suitable for both Analex and cheque sorters

NB42-013: May 12 1964, [drop test] diagram, packer arms

NB42-014: May 12 1964, customer request approval of Balvik systems stationary

NB42-015: Design for motor for print simulator

NB42-016: May 15 1964, dust problems at [BOT] solved with new tapes

NB42-017: Duplicator demonstrations., Kelinwort Benson printing complaints

NB42-018: May 20 1964, microscope borrowed to examine tape defects at GP, financing property

NB42-019: Property financing cont., furnishing

NB42-020: May 22 1964, furnishing cont., printer diagram

NB42-021: May 25 1964, visit to LEO III1 at Kleinwort Benson, bits of LEO 1 for donation to Science Museum

NB42-022: Discussions on printer simulator vs direct testing

NB42-023: Room design, visit to Charles House

NB42-024: Eastcote Lab, milar fluf, possibly from packer arms, to do list

NB42-025: A1 tape, June [meeting], ECMA

NB42-026: June 3 1964, Wireless World, fluff in absence of packer arms

NB42-027: Experiments on magnetic tape oxide, microscope

NB42-028: Microphotography

NB42-029: To do list for cottage

NB42-030: Cottage cont.

NB42-031: [curtains] for cottage, equipment for sound

NB42-032: Sound equipment cont., allocation of jobs

NB42-033: Circuit diagram, tape spool locks

NB42-034: Soundcraft tape, portable recorder needed

NB42-035: Hermes typewriters character spacing variation, gaskets and condensers

NB42-036: June 19 1964,insurance policy, sound equipment list

NB42-037: Furniture and furnishings [for cottage]

NB42-038: June 24 1964, portable tape recorder, TM2 tape deck modifications

NB42-039: Plan to build sound equipment powered from a radio

NB42-040: June 29 1964, lab equipment, packer arms, library, new computer range

NB42-041: Microphotography discussions of equipment

NB42-042: Microphotography cont.

NB42-043: Tight deadline [house purchase ?], microscope ordered from Griffin and George

NB42-044: Diagram sound equipment, list of tape issues

NB42-045: July 8 1964: list magnetic tape problems

NB42-046: Tape problems cont.

NB42-047: Equipping dark room, phone numbers,

NB42-048: July 10(?) 1964, measurements [on tapes]

NB42-049: July 17 1964, cheque for solicitor, static measurements on paper tape

NB42-050: Assembling sound equipment

NB42-051: Elliot Eitel [meeting], booklet on stationary

NB42-052: Expenses for visit to Kidsgrove, project costs

NB42-053: Tape measurements, Ronette turntable

NB42-054: Chart, Turner re visits tomorrow

NB42-055: KDN2 specifications

NB42-056: [KDN2] applications

NB42-057: KDF6 [LEO KDF6] orders

NB42-058: Park Gate meeting, list of furnishings and tools [for house]

NB42-059: July 28 1964, cost of kitchen, carpet etc., static tests

NB42-060: July 29 1964, [Witches] coffee ingredients, Kidsgrove meeting

NB42-061: Summary for Pinkerton, current projects , costs

NB42-062: Cost, ECMA paper on stationary standards,

NB42-063: ICT Engineering - print quality for character recognition

NB42-064: High speed photography, NPL Acoustics contact details

NB42-065: [costs or measurements ?], list for cottage

NB42-066: August 25 1964, LEO 1 exhibit, dust coming through filters at customer site

NB42-067: August 26 1964, static on [paper] tape, oxide from magnetic tape

NB42-068: Artists easel design, modifications to static measurements

NB42-069: August 28 1964, static cont.

NB42-070: Diagram, static measurements with long loop

NB42-071: LEO 1, corrections [to labels ?], conductivity of paper tape

NB42-072: September 6 1964, details of car accident, Cambridge temp. and humidity recordings

NB42-073: September 9 1964, Wiggins Teape, Beconsfield, [conductivity measurements]

NB42-074: Humidity control; Tedding Instruments, Stuart King air conditioning, Casella, temp. and humidity recording

NB42-075: Static on paper, Followed by two blank pages,

NB42-076: Upside-down expenses page

NB42-077: Upside-down expenses page

NB42-078: Back cover

Date : 8th April 1964 to 14th September 1964

Physical Description : 1 bound volume (78 pages), paper; manuscript

Provenance :
The notebooks are being digitised while on loan to The Centre for Computing History from the LEO Computers Society, with the kind permission of the Lenaerts family.

Archive References : CMLEO/EL/NB/42 , CCH LI 57

Related Topics:

This exhibit has a reference ID of CH76475. Please quote this reference ID in any communication with the Centre for Computing History.