FR563306A - Improvements to signaling systems - Google Patents

Improvements to signaling systems

Info

Publication number
FR563306A
FR563306A FR563306DA FR563306A FR 563306 A FR563306 A FR 563306A FR 563306D A FR563306D A FR 563306DA FR 563306 A FR563306 A FR 563306A
Authority
FR
France
Prior art keywords
signaling systems
signaling
systems
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)
Inventor
David Galen Mc Caa
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 filed Critical
Application granted granted Critical
Publication of FR563306A publication Critical patent/FR563306A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/48—Coupling means therefor

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
FR563306D 1922-05-02 1923-02-22 Improvements to signaling systems Expired FR563306A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US557911A US1531801A (en) 1922-05-02 1922-05-02 Signaling system

Publications (1)

Publication Number Publication Date
FR563306A true FR563306A (en) 1923-12-03

Family

ID=24227368

Family Applications (1)

Application Number Title Priority Date Filing Date
FR563306D Expired FR563306A (en) 1922-05-02 1923-02-22 Improvements to signaling systems

Country Status (3)

Country Link
US (1) US1531801A (en)
FR (1) FR563306A (en)
GB (1) GB197296A (en)

Also Published As

Publication number Publication date
US1531801A (en) 1925-03-31
GB197296A (en) 1924-04-17

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