GB943856A - Improvements in or relating to electrical position-encoders - Google Patents

Improvements in or relating to electrical position-encoders

Info

Publication number
GB943856A
GB943856A GB31280/61A GB3128061A GB943856A GB 943856 A GB943856 A GB 943856A GB 31280/61 A GB31280/61 A GB 31280/61A GB 3128061 A GB3128061 A GB 3128061A GB 943856 A GB943856 A GB 943856A
Authority
GB
United Kingdom
Prior art keywords
conductors
encoder
conductor
shaft
teeth
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
GB31280/61A
Inventor
Cecil John Wayman
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB31280/61A priority Critical patent/GB943856A/en
Priority to US220013A priority patent/US3237189A/en
Priority to FR908236A priority patent/FR1342182A/en
Publication of GB943856A publication Critical patent/GB943856A/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
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/204—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
    • G01D5/2086—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils by movement of two or more coils with respect to two or more other coils
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/243—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the phase or frequency of ac
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/22—Analogue/digital converters pattern-reading type

Abstract

943,856. Electric selective signalling systems. GENERAL ELECTRIC CO. Ltd. Aug. 20, 1962 [Aug. 30, 1961], No. 31280/61. Heading G4H. In a position encoder first and second conductors are wound through the gaps between the teeth of a ferro-magnetic core, and a small ferromagnetic element is mounted for movement adjacent the ends of the teeth so that the reluctance of the magnetic circuit completed by the element is reduced, the coupling between the first conductor and the second conductors in each gap being characteristic of the relative positions of the element and the core. Fig. 2 illustrates a cross-section of a shaft position encoder. Each gap contains second conductors 10-14 and first conductor 8 or 9. The shaft carries a ferro-magnetic element 5 which is sufficiently large to bridge two teeth at all times. The wiring of the encoder, Fig. 3 (not shown), is such that if A.C. is applied to conductors 8, 9, Fig. 5, signals appear in conductors 10-14 in a combination unique to the current position of the shaft. After phase detection in units 29, such as described in Specification 919, 835, a parallel mode two state signal appears at 30-34. The embodiment of Fig. 5 includes a second, and identical, encoder 27<SP>1</SP> which is coupled to the shaft driving encoder 27 by a 16: 1 reduction gear. Encoders 27<SP>1</SP> and 27 thus provide coarse and fine signals respectively. To compensate for back-lash in the gears and to ensure accurate changeover from one coarse position to the next for each sixteen steps of the fine scale, the most significant digit of the fine scale is used to energize either winding 8<SP>1</SP> or 9<SP>1</SP> (which together constitute the first conductor) and which correspond to the even-numbered and oddnumbered gaps in the coarse encoder. If a serial mode signal is required, D. C.pulses are applied in turn to the second conductors, a serial mode signal then appearing on the first conductor. Specifications 863,027 and 920,535 also are referred to.
GB31280/61A 1961-08-30 1961-08-30 Improvements in or relating to electrical position-encoders Expired GB943856A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB31280/61A GB943856A (en) 1961-08-30 1961-08-30 Improvements in or relating to electrical position-encoders
US220013A US3237189A (en) 1961-08-30 1962-08-28 Electrical position-encoders
FR908236A FR1342182A (en) 1961-08-30 1962-08-30 Electrical position encoders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31280/61A GB943856A (en) 1961-08-30 1961-08-30 Improvements in or relating to electrical position-encoders

Publications (1)

Publication Number Publication Date
GB943856A true GB943856A (en) 1963-12-11

Family

ID=10320765

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31280/61A Expired GB943856A (en) 1961-08-30 1961-08-30 Improvements in or relating to electrical position-encoders

Country Status (2)

Country Link
US (1) US3237189A (en)
GB (1) GB943856A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3371338A (en) * 1963-08-29 1968-02-27 Ippolito Giovanni Apparatus for continuously detecting increments of movement of a movable member by means of instantaneous an alog-digital conversion
US3504359A (en) * 1965-05-13 1970-03-31 Cutler Hammer Inc Position-input encoders
US3594741A (en) * 1968-05-29 1971-07-20 Bendix Corp Electromechanical transducer
JPS57135917U (en) * 1981-02-20 1982-08-25
JPS597213A (en) * 1982-07-05 1984-01-14 Inoue Japax Res Inc Encoder
EP0473808A1 (en) * 1990-09-03 1992-03-11 Hottinger Baldwin Messtechnik Gmbh Measuring device for the determination of a path or a position

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2931023A (en) * 1955-02-14 1960-03-29 Ibm Digital position indicator
US2930033A (en) * 1956-04-17 1960-03-22 Richard C Webb Angular position converter
NL247256A (en) * 1959-01-12

Also Published As

Publication number Publication date
US3237189A (en) 1966-02-22

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