FR858941A - Improvements to signaling systems - Google Patents

Improvements to signaling systems

Info

Publication number
FR858941A
FR858941A FR858941DA FR858941A FR 858941 A FR858941 A FR 858941A FR 858941D A FR858941D A FR 858941DA FR 858941 A FR858941 A FR 858941A
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)
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR858941A publication Critical patent/FR858941A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H03J7/042—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant with reactance tube
FR858941D 1938-08-20 1939-08-10 Improvements to signaling systems Expired FR858941A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US858941XA 1938-08-20 1938-08-20

Publications (1)

Publication Number Publication Date
FR858941A true FR858941A (en) 1940-12-06

Family

ID=22194679

Family Applications (1)

Application Number Title Priority Date Filing Date
FR858941D Expired FR858941A (en) 1938-08-20 1939-08-10 Improvements to signaling systems

Country Status (1)

Country Link
FR (1) FR858941A (en)

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