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.)
G08B—SIGNALLING OR 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
Vorrichtung zum Umsteuern eines Gasventils durch zwei übereinander angeordnete Elektromagnete, bei welcher das Ventil in der Offenstellung durch eine Sperrkugel gesichert wird.