US4893348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power source control device in car telephone mobile station system
Assignee: Mitsubishi Electric Corp
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Filing: 1988-09-08
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Granted: 1990-01-09
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Expires: 2008-09-08
Abstract
Abstract A power source control device in a car telephone mobile station system where an abnormal state detecting means installed within a body CPU supervises signals transmitted from a hand set CPU, and if abnormal state of the signal from the hand set CPU occurs caused by disconnection of a hand set or runaway of the hand set CPU, a power source control signal is inputted to a control terminal of a power source circuit so as to change the power source circuit from the ON-state into the OFF-state.
Inventors
- 👤 Akira Andoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:20
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/02; H04W52/0209; H04W52/0261; H04W52/0274; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
189 words
A car telephone mobile station system, comprising: a body device including a body control unit, a radio transmitting/receiving circuit controlled by said body control unit, a battery for providing a source of power, and a power source circuit controlling the supply of power to said body control unit and said radio transmitting/receiving circuit from said battery in response to an ON/OFF signal; a hand set connected to said body device and receiving power from said power source circuit including a hand set control unit communicating with said body control unit, a power source switch providing a first power source control signal for developing said ON/OFF signal to said power source circuit, and a voice circuit for transmitting and receiving voice signals to and from said radio transmitting/receiving circuit; a control terminal provided at said power source control circuit which receives a second power source control signal for turning said power source circuit off; and abnormal state detecting means provided in said body control unit for detecting an abnormal state of a signal from said hand set control unit and developing said second power source control signal in response thereto.
Claim 2
Dependent Claim
189 words
A car telephone mobile station system, comprising: a body device including a body control unit, a radio transmitting/receiving circuit controlled by said body control unit, a battery for providing a source of power, and a power source circuit controlling the supply of power to said body control unit and said radio transmitting/receiving circuit from said battery in response to an ON/OFF signal; a hand set connected to said body device and receiving power from said power source circuit including a hand set control unit communicating with said body control unit, a power source switch providing a first power source control signal for developing said ON/OFF signal to said power source circuit, and a voice circuit for transmitting and receiving voice signals to and from said radio transmitting/receiving circuit; a control terminal provided at said power source control circuit which receives a second power source control signal for turning said power source circuit off; and abnormal state detecting means provided in said body control unit for detecting an abnormal state of a signal from said hand set control unit and developing said second power source control signal in response thereto.
Claim 3
Dependent Claim
41 words
A system as a set forth in claim 1, wherein said abnormal state detecting means further receives said first power source control signal from said power source switch and provides said ON/OFF signal to said power source circuit in response thereto.
Claim 4
Dependent Claim
27 words
A system as set forth in claim 1, wherein said first power source control signal is applied directly to said power source circuit as said ON/OFF signal.
References Cited (Backward Citations)
JPH06219834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |