GB809343A - Digital electric shaft position indicator - Google Patents

Digital electric shaft position indicator

Info

Publication number
GB809343A
GB809343A GB29164/56A GB2916456A GB809343A GB 809343 A GB809343 A GB 809343A GB 29164/56 A GB29164/56 A GB 29164/56A GB 2916456 A GB2916456 A GB 2916456A GB 809343 A GB809343 A GB 809343A
Authority
GB
United Kingdom
Prior art keywords
disc
feet
inches
brushes
inch
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
GB29164/56A
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.)
Bendix Aviation Corp
Original Assignee
Bendix Aviation Corp
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 Bendix Aviation Corp filed Critical Bendix Aviation Corp
Publication of GB809343A publication Critical patent/GB809343A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/40—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using bands or wires as transmission elements
    • G01F23/44—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using bands or wires as transmission elements using electrically actuated indicating means
    • 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
    • H03M1/24—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip
    • H03M1/26—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with weighted coding, i.e. the weight given to a digit depends on the position of the digit within the block or code word, e.g. there is a given radix and the weights are powers of this radix

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

809,343. Digital electric liquid level indicators. BENDIX AVIATION CORPORATION. Sept. 24, 1956 [Sept. 28, 1955], No. 29164/56. Class 40 (1). A device for producing digital electric signals representative of the level of a liquid 4 in feet and inches by means of mechanically connected commutating discs there being one disc per denomination, one 24 for inches and one 32 for feet, is characterized in that the higher denominational disc has two sets of sensing brushes one set being positioned slightly ahead of the theoretical sensing position 52 (i.e. excluding back-lash in gears &c.) and one set being positioned slightly behind the theoretical position, the set that is actually used to produce the output signals being selected by a relay 48 which is controlled by one of the brushes on the lower order disc in such a way that the output signals from the higher order disc change precisely when the lower order disc passes through its zero position, thereby eliminating possible errors. For example, when the discs are in the position corresponding to 12 feet 11 inches (in which position they are shown) relay 48 will be energized and the brushes C5-C8 slightly behind the theoretical position 52 will be operative. If the shaft then rotates in a positive direction, at the instant the inches disc 24 passes from 11 to 0 relay 48 will be de-energized, the brushes C5<SP>1</SP>-C8<SP>1</SP> will be operative, and the signals produced by the feet disc will represent 12, whereas had there been only one set of brushes co-operating at the theoretical position with the feet disc 32, there would be the possibility of the output signals from that disc changing just before or after the inches disc passes through zero, that is in going from an indication of 12 feet 11 inches to 13 feet 1 inch it would be possible to pass through the indications 13 feet 11 inches or 12 feet 0 inch or 13 feet 0 inch. The present invention eliminates this ambiguity. Each disc represents decimal members by a four-element monophyllic code the inches disc going from 0 to 11 or the feet disc from 0 to 15.
GB29164/56A 1955-09-28 1956-09-24 Digital electric shaft position indicator Expired GB809343A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US809343XA 1955-09-28 1955-09-28

Publications (1)

Publication Number Publication Date
GB809343A true GB809343A (en) 1959-02-25

Family

ID=22160595

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29164/56A Expired GB809343A (en) 1955-09-28 1956-09-24 Digital electric shaft position indicator

Country Status (1)

Country Link
GB (1) GB809343A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1274364B (en) * 1961-02-06 1968-08-01 United Aircraft Corp Analog-to-digital converter
GB2286303A (en) * 1994-02-07 1995-08-09 Ford Motor Co Position encoding

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1274364B (en) * 1961-02-06 1968-08-01 United Aircraft Corp Analog-to-digital converter
GB2286303A (en) * 1994-02-07 1995-08-09 Ford Motor Co Position encoding
GB2286303B (en) * 1994-02-07 1998-08-05 Ford Motor Co Apparatus and method for position encoding
US6140916A (en) * 1994-02-07 2000-10-31 Ford Global Technologies, Inc. Apparatus and method for position encoding

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