FR724112A - Dispositif pour la commande électrique de toutes installations, publicitaires, d'alarme, de signalisation, indicatrices, enregistreuses, etc.
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Dispositif pour la commande électrique de toutes installations, publicitaires, d'alarme, de signalisation, indicatrices, enregistreuses, etc.
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G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B13/00—Burglar, theft or intruder alarms
G08B13/22—Electrical actuation
G08B13/26—Electrical actuation by proximity of an intruder causing variation in capacitance or inductance of a circuit
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J17/00—Gas-filled discharge tubes with solid cathode
H01J17/02—Details
H01J17/04—Electrodes; Screens
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Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Circuit Arrangements For Discharge Lamps
(AREA)
Elimination Of Static Electricity
(AREA)
FR724112D1931-01-211931-09-22Dispositif pour la commande électrique de toutes installations, publicitaires, d'alarme, de signalisation, indicatrices, enregistreuses, etc.
ExpiredFR724112A
(fr)