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Publication of FR641759ApublicationCriticalpatent/FR641759A/fr
G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B9/00—Order telegraph apparatus, i.e. means for transmitting one of a finite number of different orders at the discretion of the user, e.g. bridge to engine room orders in ships
G08B9/02—Details
G08B9/06—Means for indicating disagreement between orders given and those carried out
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FR641759D1927-10-031927-10-03Avertisseur d'erreurs de manoeuvres pour machines marines
ExpiredFR641759A
(fr)