Lenaerts Notebook 29 (7 Aug 1958 - 5 May 1959)
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Notebook kept by Ernest Lenaerts during his work on the LEO computer, dated, 7 Aug 1958 - 5 May 1959 Includes entries: NB29-001: Front cover
NB29-002: August 7 1958 buses to factory, Hawthornes, Park St, LEO I voltages, storage unit circuit diagram
NB29-003: LEO I insulation failure after sleeving dissolved in CCl4
NB29-004: August 12 1958, LEO I transient [reconversion] problems, not to review Butler
NB29-005: LEO I, list of observations to make and other tasks
NB29-006: Marginal and other tests to perform
NB29-007: Advisory service, people to contact for various reasons, Nov 28 - Dec 4 exhibition [Olympia], LEO I photographs
NB29-008: To do list, 'problems needing solution'
NB29-009: Tone control circuit, tank 47 interference, reconversion problems LEO I
NB29-010: September 1 1958, LEO I and LEO II/1 issues
NB29-011: September 1 1958, preparation for computer exhibition including recording of noises, pilot of parallel processing and microprogramming
NB29-012: September 2 1958, recording 'machine out of action' figures, proposal for valve committee
NB29-013: Advisory service for collecting field experience
NB29-014: Reconversion fault LEO II/1, voltage spike, costing [of valves]
NB29-015: Life [for valves] test, including testing the effect of testing
NB29-016: Circuit diagram of test set up, tasks for King
NB29-017: Tasks for Seymour, tasks for Clements
NB29-018: Tasks for [Mrs Hassel], tasks for Hadley
NB29-019: Bristol December 17 1958, Ferranti drum, air temperature round the machine, store resistors and crystals delivered in open van
NB29-020: Bristol December 18 1958, good progress at site, management by 'PS', setting up more testing
NB29-021: Outstanding troubles, comments on valve failure, testing and efficiency
NB29-022: Printer interlock, tank 39 trouble, drum query, Powers printer maintenance
NB29-023: Plans for valve testing, LEO I coordinate diagrams
NB29-024: Tasks for Ferguson, tasks for Hadley
NB29-025: Tasks for Gibson, tasks for Mann
NB29-026: TRT [Thompson] and ABB [Barnes] issues to raise, information required from Mr Allan
NB29-027: January 21 1959 and January 13 1959, list of issues and people to handle them, figures about [cars] from the Guardian
NB29-028: General interest; progress on issues [at Bristol] , LEO II/1 valves
NB29-029: February 3 1959, Lawrence improvement to circuits, Handley observations, [Newbury] wiring, Mann marginal testing, Ferguson printer
NB29-030: Tasks for or reports to [Newbury], Handley, Jean, Caminer, Pinkerton , Ferguson, Redman
NB29-031: Cost of car (Minor 1000), heat in drum circuits
NB29-032: February 13 (1959), equipment, drum maintenance. Followed by BLANK page
NB29-033: February 19 1959, [Bristol] computer working but morale of engineers low, inadequate problem tracking
NB29-034: February 20 1959, list of tasks and issues, diagram of [?]
NB29-035: List of parts for car, list of tasks including fault reporting
NB29-036: Diagram for a corner cupboard
NB29-037: March 2 1959, list of taks and parts
NB29-038: Field Research Manager, defining role separate from other managers (operations, maintenance etc.)
NB29-039: Drum, issues for ABB, tasks for Ferguson, Mann and Gibson, mainly at Bristol and a lot to do with the drum
NB29-040: Equipment for Bristol, tasks for Mann and Gibson
NB29-041: March 17 1959, jobs at Bristol, TRT: report and discussion of LEO I flip-flop
NB29-042: Points discussed [with Ferranti] about the drum
NB29-043: LEO I flip-flop and tape reader interference, work on drum including modifications
NB29-044: March 23 1959, issues for Bristol visit, Cytamen 1000 [jB12, for anaemia ?]
NB29-045: March 25 1959, valve records and cleaning, publicising the LEO brand, BLANK page following
NB29-046: Bristol; visits, maintenance reports, [Lawson] storage, schedule for testing
NB29-047: Tasks for Gibson and Kleiner on valves, Ferranti drum issues
NB29-048: April 2 1959, tasks for engineers, parts and other issues at Bristol
NB29-049: Publicising work done on National Budget, rejection level [valves ?[
NB29-050: Earthing adjustments, Ferranti [drum] tolerances and stroke generator questions , diagram [ for document reader ?]
NB29-051: Measurements, drum modifications
NB29-052: Tasks, overheat alarm, valve stock, indicator for printer condenser fumes, drum issues
NB29-053: LDC Cubicle measurements (LE241/B LE241/C), LEO I flipflops, punch check, test rack, LEOII/1 vault, monitoring units
NB29-054: TRT to Bristol and Fords, Paris ?, core store report
NB29-055: April 21 1959, Powers Printer II/4, various tasks, Paris conference, visit Fords at Averley, print clarity problems
NB29-056: April 22nd 1959 Smith's statistics on valves, EF80 good in flipflop but not elsewhere, replace with 5965 [Phillips, designed for computers]
NB29-057: Complaint from Bristol about effects of printer switching, trade exhibitions, press releases for LEO
NB29-058: Cable mod[ification], Le Bourget and Orly [airports ?]
NB29-059: Assembly testing, parts and other tests required
NB29-060: Begins upside-down section of travel and other expenses. FOLLOWED by 2 blank pages
NB29-061: Upside-down section of travel and other expenses.
NB29-062: Upside-down section of travel and other expenses.
NB29-063: Upside-down section of travel and other expenses.
NB29-064: Upside-down section of travel and other expenses.
NB29-065: Upside-down section of travel and other expenses.
NB29-066: Upside-down section of travel and other expenses.
NB29-067: Upside-down section of travel and other expenses.
NB29-068: Upside-down section of travel and other expenses.
NB29-069: Upside-down section of travel and other expenses.
NB29-070: Tasks for house, circuit diagram of [music] system
NB29-071: Roses
NB29-072: Valve experiments, pilot computer [LEO II ?]
NB29-073: LEO II/1 maintenance, computer exhibition
NB29-074: Interior back cover, diagram for frame, list for home
NB29-075: Back cover
Date : 7th August 1958 to 5th May 1959Physical Description : 1 bound volume (75 pages), paper; manuscript Provenance : Archive References : CMLEO/EL/NB/29 , CCH LI 57 This exhibit has a reference ID of CH76449. Please quote this reference ID in any communication with the Centre for Computing History. |
 
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Copyright Ernest Lenaerts File Size: 83.97 MB
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