INDICATION UNIT Russian patent published in 2001 - IPC

FIELD: electric and radio engineering. SUBSTANCE: indication unit can be employed to short-circuit contacts of electric circuits in alarm signaling facilities in cases of individual intervention and unauthorized penetration into protected objects, in instruments and signal transmitters. Indication unit has insulation chamber with liquid matter displaying electric conduction, electric contacts with leads-out and leads-in which short- circuit depending on position of liquid matter. Insulation bursting ampoule carrying current-conducting liquid is brought into chamber, electric contacts are installed between outer side of insulation bursting ampoule and inner surface of insulation chamber. EFFECT: simplified design of indication unit short-circuiting contacts of electric circuit of alarm signaling facility by current- conducting liquid flowing from bursting ampoule and reduced dimensions. 1 dwg