Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
  • G01N9/10—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials
  • G01N9/12—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials by observing the depth of immersion of the bodies, e.g. hydrometers
  • G01N9/14—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials by observing the depth of immersion of the bodies, e.g. hydrometers the body being built into a container
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F19/00—Fixed transformers or mutual inductances of the signal type
  • H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
  • H03D1/00—Demodulation of amplitude-modulated oscillations
  • H03D1/14—Demodulation of amplitude-modulated oscillations by means of non-linear elements having more than two poles
  • H03D1/16—Demodulation of amplitude-modulated oscillations by means of non-linear elements having more than two poles of discharge tubes
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
  • H04B1/06—Receivers
  • H04B1/16—Circuits
  • H04B1/163—Special arrangements for the reduction of the damping of resonant circuits of receivers
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N5/00—Details of television systems
  • H04N5/04—Synchronising
  • H04N5/08—Separation of synchronising signals from picture signals
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N5/00—Details of television systems
  • H04N5/04—Synchronising
  • H04N5/12—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising
  • H04N5/123—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising whereby the synchronisation signal directly commands a frequency generator

Applications Claiming Priority (7)

Publications (1)

Family

ID=32512791

Family Applications (1)

Country Status (6)

Families Citing this family (4)

• 0
  • NL NL46052D patent/NL46052C/xx active
  • BE BE405607D patent/BE405607A/xx unknown
  • NL NL52223D patent/NL52223C/xx active
• 1933
  • 1933-10-24 DE DER89049D patent/DE681003C/de not_active Expired
• 1934
  • 1934-03-23 FR FR770575D patent/FR770575A/fr not_active Expired
  • 1934-03-24 GB GB9249/34A patent/GB435417A/en not_active Expired
  • 1934-07-17 US US735600A patent/US2029640A/en not_active Expired - Lifetime
  • 1934-07-17 FR FR45063D patent/FR45063E/fr not_active Expired
  • 1934-07-19 GB GB21084/34A patent/GB441285A/en not_active Expired
  • 1934-10-10 FR FR45442D patent/FR45442E/fr not_active Expired
  • 1934-10-11 GB GB29093/34A patent/GB447401A/en not_active Expired
  • 1934-10-20 US US749236A patent/US2118866A/en not_active Expired - Lifetime
  • 1934-10-20 FR FR45446D patent/FR45446E/fr not_active Expired
  • 1934-10-22 FR FR45447D patent/FR45447E/fr not_active Expired
  • 1934-10-22 GB GB30180/34A patent/GB449316A/en not_active Expired
• 1935
  • 1935-02-15 FR FR46060D patent/FR46060E/fr not_active Expired
  • 1935-02-15 GB GB4856/35A patent/GB452118A/en not_active Expired
  • 1935-04-15 US US16430A patent/US2137354A/en not_active Expired - Lifetime
  • 1935-04-17 FR FR46091D patent/FR46091E/fr not_active Expired
  • 1935-04-18 GB GB11940/35A patent/GB446707A/en not_active Expired
• 1936
  • 1936-05-01 US US77416A patent/US2097804A/en not_active Expired - Lifetime
  • 1936-05-19 US US80584A patent/US2094678A/en not_active Expired - Lifetime

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