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Individual
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Individual
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Priority to ES203193ApriorityCriticalpatent/ES203193A1/en
Publication of ES203193A1publicationCriticalpatent/ES203193A1/en
Signaling device for gas and fire escapes essentially characterized in that it consists of a closed chamber one of whose walls is an easily dilatable membrane provided with an electrical contact piece that is normally separated from another contact facing it inside the the closed chamber in which it can be supported when the membrane is dilated due to the increase in atmospheric pressure in the room in which the apparatus is installed by closing the circuit of a bell, a lamp or other warning means. (Machine-translation by Google Translate, not legally binding)
ES203193A1952-04-181952-04-18A gas and fire exhaust signal apparatus (Machine-translation by Google Translate, not legally binding)
ExpiredES203193A1
(en)
A device applicable to electrical rings for the indication of interruptions or resumption of calls (Machine-translation by Google Translate, not legally binding)