Patent US3828253A successfully refreshed from Google Patents.
US3828253A
Expired / Lapsed
US
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Quantized indication arrangement
Assignee: Pentax Corp
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Filing: 1972-09-07
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Granted: 1974-08-06
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Expires: 1992-09-07
Abstract
Abstract A quantized indicating unit. A controllable constant current source is connected in a circuit path for current flow. A plurality of parallel resistors are provided, together with means for selectively coupling any one of the resistors into the path for current flow. A scanner sequentially scans through a sequence of states. A coupling means responds to each different one of the states for coupling at least one different resistor into the current path, thereby causing, for each of the states, a signal on the coupled resistor corresponding to the amount of the current flow and to the coupled resistor. A source of reference signals is provided, together with a comparing circuit for comparing the signal with the reference signal. An indicating element is provided for each of the resistors. A gate is coupled to the scanner and the comparing means and is responsive to a correspondence detected by the comparing means for switching an indicating element into an indicating condition, which element corresponds to the resistor that is coupled into the current path.
Inventors
- 👤 C Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:49
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/18; G03B17/20; G03B9/00; G03B9/70
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
166 words
A quantized indicating unit comprising: a controllable constant current source connected in a circuit path for current flow; a plurality of impedance means; means for selectively coupling any one of said impedance means in said path for current flow; means for sequentially scanning through a sequence of states, said coupling means responding to each different one of said states for coupling at least one different impedance means into said current path, thereby causing, for each of said states, a signal on said coupled impedance means corresponding to the amount of said current flow and to the coupled impedance means; a source of a reference signal; means for comparing said signal with said reference signal; an indicating element for each of said impedance means; and means coupled to said scanning means and comparing means and responsive to a correspondence detected by said comparing means for switching an indicating element into an indicating condition which element corresponds to the impedance means that is coupled into said current path.
Claim 2
Dependent Claim
166 words
A quantized indicating unit comprising: a controllable constant current source connected in a circuit path for current flow; a plurality of impedance means; means for selectively coupling any one of said impedance means in said path for current flow; means for sequentially scanning through a sequence of states, said coupling means responding to each different one of said states for coupling at least one different impedance means into said current path, thereby causing, for each of said states, a signal on said coupled impedance means corresponding to the amount of said current flow and to the coupled impedance means; a source of a reference signal; means for comparing said signal with said reference signal; an indicating element for each of said impedance means; and means coupled to said scanning means and comparing means and responsive to a correspondence detected by said comparing means for switching an indicating element into an indicating condition which element corresponds to the impedance means that is coupled into said current path.
Claim 3
Dependent Claim
52 words
A quantizing unit according to claim 1 wherein said impedance means has one end coupled together in common into said current path and said means for switching comprises switch means coupled to all of said impedance means for coupling a second end of any of said impedance means into said current path.
Claim 4
Dependent Claim
31 words
A quantizing unit according to claim 2 wherein said impedance means are arranged in parallel and said coupling means couples a second end of said impedance means into said current path.
Claim 5
Dependent Claim
37 words
A quantizing unit according to claim 1 wherein said scanning means comprises a source of clock pulses and circuit means responsive to said pulses for stepping from one state to the next through said series of states.
Claim 6
Dependent Claim
47 words
A quantizing unit according to claim 4 comprising disabling means coupled to said source of clock pulses and said comparing means for preventing application of the clock pulses to said circuit means responsive to said predetermined correspondence and thereby retain the corresponding indication of said indicating means.
Claim 7
Dependent Claim
36 words
A quantizing unit according to claim 5 wherein said disabling means coupled to said source of clock pulses and said comparing means comprises gate means coupled between said source of clock pulses and said circuit means.
Claim 8
Dependent Claim
58 words
A quantizing unit according to claim 5 comprising controllable switch means coupled to said comparing means and memory means coupled between said switch means and said disabling means, switching of said switching means to a first state causing said memory means to control said disabling means and thereby prevent application of said clock pulses to said circuit means.
Claim 9
Dependent Claim
14 words
A quantizing unit according to claim 1 wherein said impedance means comprises a resistor.
Claim 10
Dependent Claim
161 words
A quantized indicating unit comprising: a controllable constant current source connected in a circuit path for current flow; a plurality of parallel resistors; means for selectively coupling any one of said resistors in said path for current flow; means for sequentially scanning through a sequence of states, said coupling means responding to each different one of said states for coupling at least one different resistor into said current path, thereby causing, for each of said states, a signal on said coupled resistor corresponding to the amount of said current flow and to the coupled resistor; a source of a reference signal; means for comparing said signal with said reference signal; an indicating element for each of said resistors; and gate means coupled to said scanning means and comparing means and responsive to a correspondence detected by said comparing means for switching an indicating element into an indicating condition which element corresponds to the resistor that is coupled into said current path.
Claim 11
Dependent Claim
161 words
A quantized indicating unit comprising: a controllable constant current source connected in a circuit path for current flow; a plurality of parallel resistors; means for selectively coupling any one of said resistors in said path for current flow; means for sequentially scanning through a sequence of states, said coupling means responding to each different one of said states for coupling at least one different resistor into said current path, thereby causing, for each of said states, a signal on said coupled resistor corresponding to the amount of said current flow and to the coupled resistor; a source of a reference signal; means for comparing said signal with said reference signal; an indicating element for each of said resistors; and gate means coupled to said scanning means and comparing means and responsive to a correspondence detected by said comparing means for switching an indicating element into an indicating condition which element corresponds to the resistor that is coupled into said current path.
References Cited (Backward Citations)
US435896A
Cited
US3634763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |