Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2008-06-24
2008-06-24
Nguyen, Phung T. (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S657000, C439S489000
Reexamination Certificate
active
07391334
ABSTRACT:
A connection checking system of the present invention is arranged so as to apply a power supply voltage which is dropped by the resistance to a terminal when the control substrate and the unit are connected. Then, the control section determines that the unit is connected to the control substrate when the dropped voltage is applied to the terminal. On the other hand, when a dropped voltage is not applied to the terminal, the control section determines that the unit is not connected to the control substrate. The connection checking system of the present invention can be realized by using a conventional power supply cable, a signal cable and a terminal, and thus the connection checking system of the present invention can be manufactured at low costs.
REFERENCES:
patent: 5347265 (1994-09-01), Shimura
patent: 5481377 (1996-01-01), Udagawa et al.
patent: 62-267674 (1987-11-01), None
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Nippon Dennkl 78KO/KE1 user's manual (U162228 JJV0UD00), NEC Electronics Corporation, Jan. 2003, pp. 2, 41-54.
Hiro Hideyuki
Ishii Hiroshi
Miyake Kouji
Tanaka Kenji
Conlin David G.
Daley, Jr. William J.
Edwards Angell Palmer & & Dodge LLP
Nguyen Phung T.
Sharp Kabushiki Kaisha
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