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Lenaerts Notebook 35 (19 Jan - 16 Apr 1962)
| Home > LEO Computers > Lyons Electronic Office (LEO) Archive > CMLEO/EL - Ernest Lenaerts Collection > Lenaerts Notebooks > Lenaerts Notebook 35 ... 19 Jan - 16 Apr 1962) |
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Notebook kept by Ernest Lenaerts during his work on the LEO computer. Includes entries: NB35-001: Front cover
NB35-002: Inside front cover. January 19 1962, field research projects, stool for wiring LEO III
NB35-003: To do list, current calculations
NB35-004: Fault sheet for Hartree, how much for LEO II/2, RF cable problems
NB35-005: Jan 15 1962, log of LEO II/2, store collapse, tubes failing
NB35-006: Description of transferring orders to [punched paper] tape
NB35-007: Order to tape cont., getting readout
NB35-008: January 26 1962, using back conductance, visit to Post Office to see improvements to printing
NB35-009: Post Office printing cont.
NB35-010: BSI Committee on paper, upgrades to EMI machine
NB35-011: January 30 1962, long to do list
NB35-012: To do list cont.,
NB35-013: February 1 1962, stylus wires, Engineers meeting, LEO III/2 dispatch
NB35-014: Maintenance time, drums on II/5, [Powers] printer
NB35-015: Discussions on liaison between research and maintenance, testing drum
NB35-016: Equipment for ammeter and other measurements [on drum ?]
NB35-017: February 3 1962 and February 6 1962, printer troubleshooting, temperature at Edmonton
NB35-018: February 5(?) 1962, poor soldering on Ampex [tape machine], drum installation
NB35-019: Disappointed new employee, Mr Gill, vault temperatures [Edmonton]
NB35-020: Diagrams [vault layout]
NB35-021: Metal plating [on contacts] quality and type
NB35-022: Plating continued,
NB35-023: February 4 1962, plating continued and conclusions, concert on television, EMI ball race
NB35-024: Ampex contact plating cont.
NB35-025: Contact details for other users of Ampex tape deck
NB35-026: February 12 1962, recommendations for LEOII/7 [Edmonton
NB35-027: Sprockets and print position, calculation of temperature rise
NB35-028: Platinised anodes and salts for plating
NB35-029: Test write failure, interference problems in LEO II/4 at Averly (Ford0
NB35-030: February 16 1962, Powers printer, Ferranti spools vs Decca and Ampex
NB35-031: Dismantling and investigating Ampex tape deck connections, including diagrams
NB35-032: Ampex cont.
NB35-033: March 2 1962, meeting and contact details, tube temperature and frequency measurements
NB35-034: German grammar notes
NB35-035: Star delta [control], interlocks
NB35-036: Diagrams [tape path in tape deck]
NB35-037: Addressing store
NB35-038: Addressing cont.
NB35-039: Air conditioning companies, photographs of [magnetic] tape abrasion
NB35-040: Ampex observations
NB35-041: March 12 1962, new office arrangement, observations of damage to [magnetic] tape on deck 1
NB35-042: [magnetic] tape damage on Deck 4, LEO !!/1 failure
NB35-043: Discussions with EMI, on Ferranti paper tape reader, other discussion son Elliot card reader
NB35-044: March 13 1962, price of character discs, circuit diagram thermistor potentiometer
NB35-045: March 14 1962, replacement cabling causing interference in store
NB35-046: March 15 1962, interference problems in store at Averley [Ford]
NB35-047: Requirements for investigating interference in store
NB35-048: Reporting on Powers printer, magnetic tape, drum and valves
NB35-049: Fault finding, considerations of paper folding and properties
NB35-050: Diagram of store
NB35-051: Review of faults, properties of paper
NB35-052: Investigating surface texture of paper
NB35-053: Contact for plastic coating, dimensions of paper samples
NB35-054: Tests to be done on paper
NB35-055: Diagram of paper tester, interference measurements
NB35-056: Friction when using CAV stationery, Wiggins Tape NCR [no carbon required] stationery
NB35-057: Measuring paper on paper friction, including diagrams
NB35-058: March 30 1962, materials for garage door, problems with the library committee
NB35-059: March 3 1962, jobs for Evans and Holwill at Hartree House,
NB35-060: March 3 1962,equipment for measuring the speed of paper
NB35-061: March 3 1962, list of elements of some system somewhere
NB35-062: List of equipment and processes for monitoring including alarms,
NB35-063: HF interference, possible sources, [drum] measurements
NB35-064: Circuit diagrams for switch and power gate, reliability, industrial control systems [Roth Industries]
NB35-065: Floor problems, intermediate storage,2 hours mending 15,000 transistor fault incidents
NB35-066: Cossor 1035 oscilloscope available, Avo meter, paper tape timings
NB35-067: Microswitch failures on Samastronic printer failures LEO II/5
NB35-068: April 9 1962, paper for printing, plate glass hold-up, photographic equipment required
NB35-069: April 10 1962, agenda items for library meeting, frequency control problems LEO II/7
NB35-070: April 10 1962, keeping weather records to see if explains store problems
NB35-071: April 10 1962, ventilation for LEO II/7, LEOII/5 interference problems not due to mains
NB35-072: Measurements on paper [for printing] and on paper tape
NB35-073: Cards tolerances IBM, ICT, Bull, storage and humidity, environmental rooms
NB35-074: Paper properties, epolene c-10
NB35-075: List of equipment, activities and dates for LEO III/1 [move to Hartree House]
NB35-076: April 16 1962, check long term faults, review continuous stationary, commission LEO II test rack
NB35-077: Diagram of pulse timings, magnetic tape, oxide dust
NB35-078: Blank page follows, square wave diagrams
NB35-079: Sideways text,
NB35-080: Sideways text, some letters replace with 'X'
NB35-081: Upside-down section of expenses and inside back cover
NB35-082: Back cover
Date : 19th January 1962 to 16th April 1962Physical Description : bound volume (82 pages), paper; manuscript Provenance : Archive References : CMLEO/EL/NB/35 , CCH LI 57 This exhibit has a reference ID of CH76458. Please quote this reference ID in any communication with the Centre for Computing History. |
 
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Copyright Ernest Lenaerts File Size: 118.15 MB  |
