US3636447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide-angle two-coil electrical gauge
Assignee: Motors Liquidation Co
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Filing: 1970-05-06
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Granted: 1972-01-18
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Expires: 1990-05-06
Abstract
Abstract A wide-angle electrical gauge having two coils whose magnetic axes are at right angles. A signal source supplies a signal whose magnitude is proportional to the magnitude of the condition to be indicated. A sine generator is responsive to the output of the signal source and controls the current through one of the coils in a manner such that the magnetic field along its magnetic axis varies in an approximated sinusoidal fashion. A cosine generator is responsive to the output of the signal source and controls the current through the remaining coil in a manner so as to generate a magnetic field along its magnetic axis which is phase shifted from the magnetic field generated by the sine generator so as to take the form of an approximated cosine waveform in relationship thereto. A magnetic armature aligns itself with the resultant of the two magnetic fields whose angular position corresponds to the magnitude of the condition being measured.
Inventors
- 👤 Robert B Gelenius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:17
CPC Classifications
G; G01; G01R; G01R7/00; G01R7/04; G01R7/06; G01P; G01P1/00; G01P1/07; G01P1/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
156 words
A system for developing a magnetic field, the angular direction of which is approximately proportional to the magnitude of an input quantity and the range of direction of which approximates 360* comprising, in combination, first and second coils in quadrature adapted to generate a common magnetic field equal to the vector sum of the magnetic fields generated individually by the first and second coils; an input circuit for supplying the input quantity to the system; first means responsive to the input quantity for delivering an output current varying approximately as a single cycle of a sine wave as the input quantity increases from a minimum to a maximum value, and second means responsive to the input quantity for delIvering an output current varying approximately as a single cycle of a cosine wave as the input quantity increases from a minimum to a maximum value, the output currents being connected respectively to the first and second coils.
Claim 2
Independent Claim
156 words
A system for developing a magnetic field, the angular direction of which is approximately proportional to the magnitude of an input quantity and the range of direction of which approximates 360* comprising, in combination, first and second coils in quadrature adapted to generate a common magnetic field equal to the vector sum of the magnetic fields generated individually by the first and second coils; an input circuit for supplying the input quantity to the system; first means responsive to the input quantity for delivering an output current varying approximately as a single cycle of a sine wave as the input quantity increases from a minimum to a maximum value, and second means responsive to the input quantity for delIvering an output current varying approximately as a single cycle of a cosine wave as the input quantity increases from a minimum to a maximum value, the output currents being connected respectively to the first and second coils.
Claim 3
Independent Claim
121 words
A system for rotating a shaft approximately proportionally to a quantity X where X represents the proportional increment of an input quantity which varies from a minimum to a maximum value and where the shaft has a rotation range of approximately 360* comprising, in combination, a first circuit responsive to X and having an output of approximately sin(k1X+k2), where k1 is a scale constant and k2 a datum constant; a second circuit responsive to X and having an output of approximately cos(k1X+k3) where k3 approximately equals k2 or k2+180*; a pair of coils in quadrature connected respectively to the said circuits; and a magnet mounted on the shaft so as to be self-aligning with the resultant magnetic field of the coils.
Claim 4
Independent Claim
121 words
A system for rotating a shaft approximately proportionally to a quantity X where X represents the proportional increment of an input quantity which varies from a minimum to a maximum value and where the shaft has a rotation range of approximately 360* comprising, in combination, a first circuit responsive to X and having an output of approximately sin(k1X+k2), where k1 is a scale constant and k2 a datum constant; a second circuit responsive to X and having an output of approximately cos(k1X+k3) where k3 approximately equals k2 or k2+180*; a pair of coils in quadrature connected respectively to the said circuits; and a magnet mounted on the shaft so as to be self-aligning with the resultant magnetic field of the coils.
Claim 5
Dependent Claim
293 words
An electrical measuring apparatus for measuring an event at a remote point comprising, in combination, means for providing a signal related to the event to be measured; first and second coil means having respective first and second magnetic axes in quadrature; a first current control means connected to the first coil means for controlling current therethrough in a first direction; a second current control means connected to the first coil means for controlling current therethrough in a direction opposite to the first direction, wherein the first and second current control means are responsive to an increase in the signal related to the event to be measured for varying the current through the first coil means in an approximate sinusoidal manner for generating a corresponding first magnetic field along the first magnetic axis; a third current control means connected to the second coil means for controlling the current therethrough in a first direction; a fourth current control means connected to the second coil means for controlling current therethrough in an opposite direction to the first direction, wherein the third and fourth current control means are responsive to an increase in the signal related to the event to be measured for alternately varying the current through the second coil means in an approximate sinusoidal manner for generating a corresponding second magnetic field along the second magnetic axis, wherein the current through the second coil means is phase shifted from the current through the first coil means for establishing an approximated sine-cosine relationship therebetween; rotatably mounted magnetic means responsive to the first and second magnetic fields be maintained in alignment with the resultant thereof; and indicator means connected to the magnetic means for rotation therewith for indicating the magnitude of the event at the remote point.
Claim 6
Dependent Claim
293 words
An electrical measuring apparatus for measuring an event at a remote point comprising, in combination, means for providing a signal related to the event to be measured; first and second coil means having respective first and second magnetic axes in quadrature; a first current control means connected to the first coil means for controlling current therethrough in a first direction; a second current control means connected to the first coil means for controlling current therethrough in a direction opposite to the first direction, wherein the first and second current control means are responsive to an increase in the signal related to the event to be measured for varying the current through the first coil means in an approximate sinusoidal manner for generating a corresponding first magnetic field along the first magnetic axis; a third current control means connected to the second coil means for controlling the current therethrough in a first direction; a fourth current control means connected to the second coil means for controlling current therethrough in an opposite direction to the first direction, wherein the third and fourth current control means are responsive to an increase in the signal related to the event to be measured for alternately varying the current through the second coil means in an approximate sinusoidal manner for generating a corresponding second magnetic field along the second magnetic axis, wherein the current through the second coil means is phase shifted from the current through the first coil means for establishing an approximated sine-cosine relationship therebetween; rotatably mounted magnetic means responsive to the first and second magnetic fields be maintained in alignment with the resultant thereof; and indicator means connected to the magnetic means for rotation therewith for indicating the magnitude of the event at the remote point.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |