FR875346A - Control device for checking the equality of two frequencies - Google Patents

Control device for checking the equality of two frequencies

Info

Publication number
FR875346A
FR875346A FR875346DA FR875346A FR 875346 A FR875346 A FR 875346A FR 875346D A FR875346D A FR 875346DA FR 875346 A FR875346 A FR 875346A
Authority
FR
France
Prior art keywords
equality
frequencies
checking
control device
control
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
Other languages
French (fr)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of FR875346A publication Critical patent/FR875346A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D1/00—Water flushing devices with cisterns ; Setting up a range of flushing devices or water-closets; Combinations of several flushing devices
    • E03D1/02—High-level flushing systems
    • E03D1/04—Cisterns with bell siphons
    • E03D1/05—Cisterns with bell siphons with movable siphon bells
    • E03D1/056—Cisterns with bell siphons with movable siphon bells providing an air lock
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D1/00—Water flushing devices with cisterns ; Setting up a range of flushing devices or water-closets; Combinations of several flushing devices
    • E03D1/02—High-level flushing systems
    • E03D1/04—Cisterns with bell siphons
    • E03D1/05—Cisterns with bell siphons with movable siphon bells
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/08—Regulating voltage or current wherein the variable is dc
    • G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
    • G05F3/12—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being glow discharge tubes

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Public Health (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Health & Medical Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Nonlinear Science (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
FR875346D 1940-09-17 1941-09-17 Control device for checking the equality of two frequencies Expired FR875346A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL875346X 1940-09-17
NL911297X 1940-09-17
NL2358439X 1940-09-17

Publications (1)

Publication Number Publication Date
FR875346A true FR875346A (en) 1942-09-16

Family

ID=74575347

Family Applications (1)

Application Number Title Priority Date Filing Date
FR875346D Expired FR875346A (en) 1940-09-17 1941-09-17 Control device for checking the equality of two frequencies

Country Status (3)

Country Link
US (1) US2358439A (en)
DE (1) DE911297C (en)
FR (1) FR875346A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4019039A (en) * 1975-11-28 1977-04-19 The Singer Company Synchroscope simulator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT159284B (en) * 1937-03-31 1940-08-10 Rca Corp Device for comparing two frequencies.

Also Published As

Publication number Publication date
US2358439A (en) 1944-09-19
DE911297C (en) 1954-05-13

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