FR758337A - Improvement in signaling devices - Google Patents

Improvement in signaling devices

Info

Publication number
FR758337A
FR758337A FR758337DA FR758337A FR 758337 A FR758337 A FR 758337A FR 758337D A FR758337D A FR 758337DA FR 758337 A FR758337 A FR 758337A
Authority
FR
France
Prior art keywords
improvement
signaling devices
signaling
devices
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.)
Lignes Telegraphiques et Telephoniques LTT SA
Original Assignee
Lignes Telegraphiques et Telephoniques LTT 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 Lignes Telegraphiques et Telephoniques LTT SA filed Critical Lignes Telegraphiques et Telephoniques LTT SA
Application granted granted Critical
Publication of FR758337A publication Critical patent/FR758337A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR758337D 1932-10-14 1932-10-14 Improvement in signaling devices Expired FR758337A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR758337T 1932-10-14

Publications (1)

Publication Number Publication Date
FR758337A true FR758337A (en) 1934-01-15

Family

ID=9166629

Family Applications (1)

Application Number Title Priority Date Filing Date
FR758337D Expired FR758337A (en) 1932-10-14 1932-10-14 Improvement in signaling devices

Country Status (1)

Country Link
FR (1) FR758337A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786414A (en) * 1971-03-19 1974-01-15 Philips Corp Fail safe control circuit for traffic lights

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786414A (en) * 1971-03-19 1974-01-15 Philips Corp Fail safe control circuit for traffic lights

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