Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1999-03-23
2000-04-25
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
Specific condition
3405456, 340666, 340542, 34087009, 34087002, 361661, 361664, 361667, 324 74, 324110, G08B 2100
Patent
active
060549300
ABSTRACT:
A device for detecting meter opening, the meter including at least a first structural element and a second structural element that are in a given position relative to each other when the meter is closed, said device comprising: a moving member connected to the first element and organized to take up a stable state or an unstable state as a function of the displacement of one of the structural elements relative to the other; holding means connected at least to the second element and co-operating with the moving member as a function of the displacement of one of the structural elements relative to the other, so as to hold said moving member in its unstable state and so as to enable it to go to its stable state; and detection means suitable for determining the state of the moving member and for emitting an opening signal when the moving member is in a predetermined state.
REFERENCES:
patent: 4150371 (1979-04-01), Scaglione
patent: 4583483 (1986-04-01), Rausch
patent: 5017877 (1991-05-01), Haus, Jr.
Hofsass Jeffery A.
Nguyen Tai Tan
Pojunas Leonard W.
Schlumberger Industries S.A.
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