GB739056A - Improvements in or relating to frequency-responsive systems and apparatus - Google Patents

Improvements in or relating to frequency-responsive systems and apparatus

Info

Publication number
GB739056A
GB739056A GB948052A GB948052A GB739056A GB 739056 A GB739056 A GB 739056A GB 948052 A GB948052 A GB 948052A GB 948052 A GB948052 A GB 948052A GB 739056 A GB739056 A GB 739056A
Authority
GB
United Kingdom
Prior art keywords
frequency
rotor
stator windings
april
capacitors
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
GB948052A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB948052A priority Critical patent/GB739056A/en
Publication of GB739056A publication Critical patent/GB739056A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01P3/49—Devices characterised by the use of electric or magnetic means for measuring angular speed using eddy currents
    • 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
    • G01P3/56—Devices characterised by the use of electric or magnetic means for comparing two speeds

Abstract

739,056. Automatic speed control systems. MOORE, J. R. C. April 13, 1953 [April 16, 1952], No. 9480/52. Class 38 (4). [Also in Group XXXVI] Frequency-responsive apparatus comprises two or more poly-phase-operated windings producing oppositely - acting rotating fields about a cylindrical induction rotor. A tachometer receiver or indicator, Fig. 1, has two starconnected stator windings 5, 7 producing opposite rotating fields about rotor 14 and fed through series resistor, 23-25 and capacitors 26-28, Fig. 2, whose impedance values balance at a reference or datum frequency so that the stator windings 5, 7 are equally energized and the rotor 14 is stationary. If the frequency varies the capacitors 26-28 change in impedance and the excitation of stator windings 7 is changed whereby a difference torque operates to turn rotor 14 and pointer 17 against the restraint of a control spring 15. The latter may be omitted so that rotor 14 drives a regulator to adjust the frequency to the datum value. The construction can be extended to include additional stator windings energized from different sources and frequency and current from a common source may be compared by including an orthodox current-responsive winding.
GB948052A 1952-04-16 1952-04-16 Improvements in or relating to frequency-responsive systems and apparatus Expired GB739056A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB948052A GB739056A (en) 1952-04-16 1952-04-16 Improvements in or relating to frequency-responsive systems and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB948052A GB739056A (en) 1952-04-16 1952-04-16 Improvements in or relating to frequency-responsive systems and apparatus

Publications (1)

Publication Number Publication Date
GB739056A true GB739056A (en) 1955-10-26

Family

ID=9872780

Family Applications (1)

Application Number Title Priority Date Filing Date
GB948052A Expired GB739056A (en) 1952-04-16 1952-04-16 Improvements in or relating to frequency-responsive systems and apparatus

Country Status (1)

Country Link
GB (1) GB739056A (en)

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