FR450102A -
System for obtaining and extinguishing the electric light in the stairs of the houses, after the normal closing and extinction
- Google Patents
System for obtaining and extinguishing the electric light in the stairs of the houses, after the normal closing and extinction
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ATHANASE CLAVEL
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ATHANASE CLAVEL
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H01H50/86—Means for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts
H01H50/88—Mechanical means, e.g. dash-pot
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FR450102D1912-10-311912-10-31
System for obtaining and extinguishing the electric light in the stairs of the houses, after the normal closing and extinction
ExpiredFR450102A
(en)