GB734829A - Improvements relating to computing apparatus - Google Patents

Improvements relating to computing apparatus

Info

Publication number
GB734829A
GB734829A GB21632/48A GB2163248A GB734829A GB 734829 A GB734829 A GB 734829A GB 21632/48 A GB21632/48 A GB 21632/48A GB 2163248 A GB2163248 A GB 2163248A GB 734829 A GB734829 A GB 734829A
Authority
GB
United Kingdom
Prior art keywords
link
cores
conductors
ternary
values
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB21632/48A
Inventor
Rolf Edmund Spencer
Geoffrey Huson Stephenson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB21632/48A priority Critical patent/GB734829A/en
Priority to GB31461/52A priority patent/GB734830A/en
Publication of GB734829A publication Critical patent/GB734829A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/41—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by interpolation, e.g. the computation of intermediate points between programmed end points to define the path to be followed and the rate of travel along that path
    • G05B19/4105—Analog interpolation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/30—Arrangements for performing computing operations, e.g. operational amplifiers for interpolation or extrapolation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/02—Reversible analogue/digital converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Human Computer Interaction (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • Software Systems (AREA)
  • Manufacturing & Machinery (AREA)
  • Automation & Control Theory (AREA)
  • Electromagnets (AREA)
  • Control Of Linear Motors (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

734,829. Digital electric calculating-apparatus. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Aug. 10, 1949 [Aug. 17, 1948], No. 21632/48. Class 106 (1). [Also in Group XXXVI] A computer utilizes. the symmetric ternary scale of notation, wherein + + + +, +0 - +, + + -, + + represent 40, 25, 11, 4, respectively, as indicated in Fig. 1, wherein a constant A.C. flux in cores 1, 2, 3, 4 decreases in descending powers of three, and wherein the electromagnet fields of conductors 9, 10, 11, 12, link positively, traverse without linkage, or link in a negative sense, the different cores according to the ternary digit to be prepresented. As shown in the Fig. 2, the A.C. electromagnet fields of conductors a<SP>1</SP> ... ar from decimal tappings 21 ... 30 representing appropriate values of a function f(x) link cores 34 ... 40 to represent more exact values of f(x) according to the symmetric ternary scale. Alternate conductors also link the assembly of seven cores 49 . . . 55 and the assembly 70 or the assemblies 56 and 73, according to the ternary scale values of #<SP>1</SP>(x) and #<SP>11</SP>(x)/2, respectively. Autotransformers 64, 72, 75 energize the toroidal windings of the core assemblies 49 . . . . 55 or 56 and 70 or 73 and the brushes 65 and 66, 71, 74 are ganged together and geared to move through 180 degrees for each step of a tapping switch 32. The voltage produced across the load 33 is an accurate representation of the desired function of the input x driving the. ganged brushes and the switch 32. Specification 734,830 is referred to.
GB21632/48A 1948-08-17 1948-08-17 Improvements relating to computing apparatus Expired GB734829A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB21632/48A GB734829A (en) 1948-08-17 1948-08-17 Improvements relating to computing apparatus
GB31461/52A GB734830A (en) 1948-08-17 1948-08-17 Improvements relating to computing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21632/48A GB734829A (en) 1948-08-17 1948-08-17 Improvements relating to computing apparatus

Publications (1)

Publication Number Publication Date
GB734829A true GB734829A (en) 1955-08-10

Family

ID=10166195

Family Applications (2)

Application Number Title Priority Date Filing Date
GB31461/52A Expired GB734830A (en) 1948-08-17 1948-08-17 Improvements relating to computing apparatus
GB21632/48A Expired GB734829A (en) 1948-08-17 1948-08-17 Improvements relating to computing apparatus

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB31461/52A Expired GB734830A (en) 1948-08-17 1948-08-17 Improvements relating to computing apparatus

Country Status (1)

Country Link
GB (2) GB734830A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2152310A (en) * 1983-12-30 1985-07-31 Microskill Limited Apparatus for effecting conversion between digital and analogue electrical signals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2152310A (en) * 1983-12-30 1985-07-31 Microskill Limited Apparatus for effecting conversion between digital and analogue electrical signals

Also Published As

Publication number Publication date
GB734830A (en) 1955-08-10

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