FR2396303A1 - Magnetic pick=up with change of flux - has fixed element with pole pieces, and rotating element with pole teeth - Google Patents

Magnetic pick=up with change of flux - has fixed element with pole pieces, and rotating element with pole teeth

Info

Publication number
FR2396303A1
FR2396303A1 FR7720336A FR7720336A FR2396303A1 FR 2396303 A1 FR2396303 A1 FR 2396303A1 FR 7720336 A FR7720336 A FR 7720336A FR 7720336 A FR7720336 A FR 7720336A FR 2396303 A1 FR2396303 A1 FR 2396303A1
Authority
FR
France
Prior art keywords
pole
fixed element
change
flux
magnetic pick
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.)
Granted
Application number
FR7720336A
Other languages
French (fr)
Other versions
FR2396303B1 (en
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.)
Sev Marchal
Original Assignee
Sev Marchal
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 Sev Marchal filed Critical Sev Marchal
Priority to FR7720336A priority Critical patent/FR2396303A1/en
Priority to DE19782827341 priority patent/DE2827341A1/en
Publication of FR2396303A1 publication Critical patent/FR2396303A1/en
Application granted granted Critical
Publication of FR2396303B1 publication Critical patent/FR2396303B1/fr
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
    • F02P7/067—Electromagnetic pick-up devices, e.g. providing induced current in a coil
    • F02P7/0675—Electromagnetic pick-up devices, e.g. providing induced current in a coil with variable reluctance, e.g. depending on the shape of a tooth
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/488—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by variable reluctance detectors

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

The pickup can generate with a coil a periodic electric signal whose shape, a function of time, shows an abrupt change followed by gradual change in opposite direction. The pickup consists of at least one fixed element with at least one pole piece, and of at least one movable element with at least one pole tooth rotating in a specified direction with respect to the fixed element. It closes the magnetic circuit when at least one pole tooth is opposite to the pole piece. The volume of the gap(s) between the fixed element (1) and the movable element (5, 6) varies during uniform movement of the latter from a minimum to a next minimum through a quick increase, followed by a gradual change and finally a quick decrease.
FR7720336A 1977-07-01 1977-07-01 Magnetic pick=up with change of flux - has fixed element with pole pieces, and rotating element with pole teeth Granted FR2396303A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7720336A FR2396303A1 (en) 1977-07-01 1977-07-01 Magnetic pick=up with change of flux - has fixed element with pole pieces, and rotating element with pole teeth
DE19782827341 DE2827341A1 (en) 1977-07-01 1978-06-22 Magnetic pick=up with change of flux - has fixed element with pole pieces, and rotating element with pole teeth

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7720336A FR2396303A1 (en) 1977-07-01 1977-07-01 Magnetic pick=up with change of flux - has fixed element with pole pieces, and rotating element with pole teeth

Publications (2)

Publication Number Publication Date
FR2396303A1 true FR2396303A1 (en) 1979-01-26
FR2396303B1 FR2396303B1 (en) 1980-05-09

Family

ID=9192871

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7720336A Granted FR2396303A1 (en) 1977-07-01 1977-07-01 Magnetic pick=up with change of flux - has fixed element with pole pieces, and rotating element with pole teeth

Country Status (1)

Country Link
FR (1) FR2396303A1 (en)

Also Published As

Publication number Publication date
FR2396303B1 (en) 1980-05-09

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Legal Events

Date Code Title Description
CD Change of name or company name
TP Transmission of property
ST Notification of lapse