US3882481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low voltage indicator circuit
Assignee: American Medical Electronics Corp
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Filing: 1974-05-30
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Granted: 1975-05-06
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Expires: 1994-05-30
Abstract
Abstract An electronic system comprising a display circuit including at least two display units which are normally simultaneously enabled to display a character during an interval of operation of the system and a low voltage indicator circuit responsive to the supply voltage decreasing below a predetermined level for disabling at least one and less than all of the display units and preventing their display of a character during at least a segment of the interval.
Inventors
- 👤 Robert Bruce Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:49
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/01
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
74 words
An electronic system comprising a display circuit including at least two display units which are normally simultaneously enabled to display a character during an interval of operation of the system and a low voltage indicator circuit responsive to the supply voltage decreasing below a predetermined level for disabling at least one and less than all of said display units and preventing its display of a character during at least a segment of said interval.
Claim 2
Dependent Claim
74 words
An electronic system comprising a display circuit including at least two display units which are normally simultaneously enabled to display a character during an interval of operation of the system and a low voltage indicator circuit responsive to the supply voltage decreasing below a predetermined level for disabling at least one and less than all of said display units and preventing its display of a character during at least a segment of said interval.
Claim 3
Dependent Claim
98 words
An electronic system comprising a display circuit including at least two display units which are normally simultaneously enabled to display a character during an interval of operation of the system; and a low voltage indicator circuit responsive to a supply voltage level and to a reference voltage level for producing an output in response to said supply voltage level decreasing below a predetermined value relative to said reference voltage level for disabling at least one and less than all of said display units and preventing its display of a character during at least a segment of said interval.
Claim 4
Dependent Claim
98 words
An electronic system comprising a display circuit including at least two display units which are normally simultaneously enabled to display a character during an interval of operation of the system; and a low voltage indicator circuit responsive to a supply voltage level and to a reference voltage level for producing an output in response to said supply voltage level decreasing below a predetermined value relative to said reference voltage level for disabling at least one and less than all of said display units and preventing its display of a character during at least a segment of said interval.
Claim 5
Dependent Claim
118 words
An electronic system comprising a source of regulated power; a source of unregulated power; a display circuit including at least two display units which are normally simultaneously enabled to display a character during an interval of operation of the system; and a low voltage indicator circuit including a ratio sensing circuit responsive to said source of regulated power and said source of unregulated power for producing an output in response to said unregulated power source voltage level decreasing below a predetermined value relative to said regulated power source voltage level for disabling at least one and less than all of said display units and preventing its display of a character during at least a segment of said interval.
Claim 6
Dependent Claim
118 words
An electronic system comprising a source of regulated power; a source of unregulated power; a display circuit including at least two display units which are normally simultaneously enabled to display a character during an interval of operation of the system; and a low voltage indicator circuit including a ratio sensing circuit responsive to said source of regulated power and said source of unregulated power for producing an output in response to said unregulated power source voltage level decreasing below a predetermined value relative to said regulated power source voltage level for disabling at least one and less than all of said display units and preventing its display of a character during at least a segment of said interval.
Claim 7
Dependent Claim
138 words
An electronic thermometer system comprising a temperature sensing circuit for sensing variations in temperature; a temperature measuring circuit responsive to said temperature sensing circuit for providing a signal representative of the temperature measured; a timing and control circuit for establishing an operation interval including a time mode period in which a measured time is displayed and a temperature mode period in which a measured temperature is displayed and a display circuit including at least two display units which are normally simultaneously enabled to display a character during an interval of operation of the system, and a low voltage indicator circuit responsive to the supply voltage decreasing below a predetermined level for disabling at least one and less than all of said display units and preventing its display of a character during at least a segment of said interval.
Claim 8
Dependent Claim
138 words
An electronic thermometer system comprising a temperature sensing circuit for sensing variations in temperature; a temperature measuring circuit responsive to said temperature sensing circuit for providing a signal representative of the temperature measured; a timing and control circuit for establishing an operation interval including a time mode period in which a measured time is displayed and a temperature mode period in which a measured temperature is displayed and a display circuit including at least two display units which are normally simultaneously enabled to display a character during an interval of operation of the system, and a low voltage indicator circuit responsive to the supply voltage decreasing below a predetermined level for disabling at least one and less than all of said display units and preventing its display of a character during at least a segment of said interval.
Claim 9
Dependent Claim
18 words
The electronic thermometer system of claim 4 in which said segment is included in said temperture mode period.
Claim 10
Dependent Claim
23 words
The electronic thermometer system of claim 4 in which only said display unit representing the least significant digit is disabled during said segment.
Claim 11
Dependent Claim
103 words
An electronic thermometer system comprising a temperature sensing circuit for sensing variations in temperature; a temperature measuring circuit responsive to said temperature sensing circuit for providing a signal representative of the temperature measured; a display circuit including at least two display units which are normally simultaneously enabled to display a character during an interval of operation of the system, and a low voltage indicator circuit responsive to the supply voltage decreasing below a predetermined level for disabling at least one and less than all of said display units and preventing its display of a character during at least a segment of said interval.
Claim 12
Dependent Claim
103 words
An electronic thermometer system comprising a temperature sensing circuit for sensing variations in temperature; a temperature measuring circuit responsive to said temperature sensing circuit for providing a signal representative of the temperature measured; a display circuit including at least two display units which are normally simultaneously enabled to display a character during an interval of operation of the system, and a low voltage indicator circuit responsive to the supply voltage decreasing below a predetermined level for disabling at least one and less than all of said display units and preventing its display of a character during at least a segment of said interval.
Claim 13
Dependent Claim
23 words
The electronic thermometer system of claim 7 in which only the display unit representing the least significant digit is disabled during said segment.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |