CH551039ACH616170ACH616170ACH551039ACH 551039 ACH551039 ACH 551039ACH 616170 ACH616170 ACH 616170ACH 616170 ACH616170 ACH 616170ACH 551039 ACH551039 ACH 551039A
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Switzerland
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CH616170A
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G04C21/00—Producing acoustic time signals by electrical means
G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
G04C21/20—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to ring an electromechanical alarm