US3750122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction type telemetering system
Assignee: Mitsubishi Electric Corp
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Filing: 1972-04-13
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Granted: 1973-07-31
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Expires: 1992-04-13
Abstract
Abstract An encoding device includes two circular arrays of five equally spaced windings disposed in opposite relationships to sandwich a rotatable metallic disc provided with four openings. The openings are arranged such that, as the disc is rotated according to the measured decimal measurand, any two of them are always put between selected two pairs of opposite windings. With one of the winding arrays energized the selected two windings of the other array induce voltages indicating the measured measurand in the form of a set of two out of five codes. For the multifigure measurand, output windings one for each figure place can be serially interconnected while driving windings five for each place are sequentally energized through respective switching transistor to serially produce corresponding two-out-of-five codes from the output windings. Alternatively driving windings one for each place may be serially interconnected and successively energized through respective switching transistors while sets of corresponding output windings for all places are scanned for each place through individual transistors one for each set.
Inventors
- 👤 Y Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:58
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/16; G08C19/28
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
221 words
In an induction type telemetering system comprising a central equipment, a terminal equipment including means for measuring the measurand, and a transmission line for interconnecting the central and terminal equipments, the conbination of encoding means for encoding a measured value of the measurand into a predetermined code format said encoding means comprising an encoding plate of electrically conductive material having a plurality of openings disposed thereon in a pattern predetermined by the code format and stepwise rotatable in response to the measured value of the measurand, a plurality of first electromagnetic windings on one side of said encoding plate in a pattern predetermined by the code format, and at least one second electromagnetic winding disposed on the other Side of said encoding plate to oppose to said plurality of first electromagnetic windings through the encoding plate; scanning circuit means for scanning and sensing the mutual induction caused between each of said first windings and said at least one second winding through one of said openings on said encoding plate to cause said first windings to selectively produce an output providing the measured measurand encoded in the code form, said mutual induction between the windings being variable in accordance with the stepwise rotation of said encoding plate; and means for transmitting the coded measurand to said central equipment through said transmission line.
Claim 2
Dependent Claim
221 words
In an induction type telemetering system comprising a central equipment, a terminal equipment including means for measuring the measurand, and a transmission line for interconnecting the central and terminal equipments, the conbination of encoding means for encoding a measured value of the measurand into a predetermined code format said encoding means comprising an encoding plate of electrically conductive material having a plurality of openings disposed thereon in a pattern predetermined by the code format and stepwise rotatable in response to the measured value of the measurand, a plurality of first electromagnetic windings on one side of said encoding plate in a pattern predetermined by the code format, and at least one second electromagnetic winding disposed on the other Side of said encoding plate to oppose to said plurality of first electromagnetic windings through the encoding plate; scanning circuit means for scanning and sensing the mutual induction caused between each of said first windings and said at least one second winding through one of said openings on said encoding plate to cause said first windings to selectively produce an output providing the measured measurand encoded in the code form, said mutual induction between the windings being variable in accordance with the stepwise rotation of said encoding plate; and means for transmitting the coded measurand to said central equipment through said transmission line.
Claim 3
Dependent Claim
26 words
An induction type telemetering system as claimed in claim 1, wherein said first windings serve as driving windings capable of being applied with an alternating current.
Claim 4
Dependent Claim
27 words
An induction type telemetering system as claimed in claim 1, wherein said second winding serves as a driving winding capable of being applied with an alternating current.
Claim 5
Dependent Claim
58 words
An induction type telemetering system as claimed in claim 1, wherein in order to convert the measured measurand into a representative quantity in the form of a set of two out of five codes, said encoding plate includes four of said openings and has five driving windings disposed at substantially equal angular intervals on the one side thereof.
Claim 6
Dependent Claim
70 words
An induction type telemetering system as claimed in claim 4, wherein said four openings are positioned on said encoding plate such that each of the outermost openings is spaced away from the adjacent opening by an angular interval equal to one half said equal angular intervals for said driving windings while an angular interval between the two intermediate openings is equal to said equal angular intervals for said driving windings.
Claim 7
Dependent Claim
65 words
An induction type telemetering system as claimed in claim 1, wherein said plurality of first windings serving as driving windings are arranged in a circle and wherein in the array of said first windings and the array of said openings are disposed such that when at least one of said first wings faces any of said openings, both said arrays are concentric with each other.
Claim 8
Dependent Claim
63 words
An induction type telemetering system as claimed in claim 1, wherein a substantially C shaped magnetic member is disposed to form a closed magnetic path outside of said encoding plate along which a magnetic flux produced by the winding flows and each of said openings is formed of a hole opening at the periphery edge of said encoding plate through an individual slit.
Claim 9
Dependent Claim
44 words
An induction type telemetering system as calimed in claim 4, wherein each pair of the outermost opening and the adjacent opening on said encoding plate are continuous to form a notch spaced away from a similar notch formed of the other pair of openings.
Claim 10
Dependent Claim
41 words
An induction type telemetering system as claimed in claim 1, wherein a single electromagnetic winding serving as a driving winding is operatively associated with said encoding plate and has an outside diameter substantially equal to the diameter of said encoding plate.
Claim 11
Dependent Claim
31 words
An induction type telemetering system as claimed in claim 1, wherein said first and second windings are encircled in place with an enclosed magnetic core consisting of at least two part.
Claim 12
Dependent Claim
72 words
An induction type telemetering system as claimed in claim 10, wherein said magnetic core includes a plurality of pairs of leg portions projecting in opposite relationship from a pair of opposite interval surfaces thereof respectively one pair for each of the first windings to form gaps therebetween in which said encoding plate is rotatably disposed, each pair of said opposite leg portions having said first and second windings inductively disposed thereon respectively.
Claim 13
Dependent Claim
97 words
An induction type telemetering system as claimed in claim 10, wherein said magnetic core includes a plurality of pairs of leg portions projecting in opposite relationship from a pair of opposite internal surfaces thereof respectively one pair for each of the first windiNgs to form gaps therebetween in which said encoding plate is rotatably disposed, that set of said leg portions projecting from one of said opposite internal surfaces of said magnetic core having said first windings inductively disposed thereon respectively while all said leg portions of the other set are encircled with a single second winding.
Claim 14
Dependent Claim
45 words
an induction type telemetering system as claimed in claim 1, wherein said encoding means is disposed for each of plural figure places of the measurand to serially transmit the encoded values in the figure places of the measurand to the central equipment through transmitting means.
Claim 15
Dependent Claim
31 words
An induction type telemetering system as claimed in claim 13, wherein said windings for the figure places of the measurand disposed on the driving side are interconnected in series circuit relationship.
Claim 16
Dependent Claim
33 words
An induction type telemetering system as claimed in claim 13, wherein said windings for each of the figure places of the measurand on the driving side has applied thereto an independent driving signal.
Claim 17
Dependent Claim
105 words
An induction type telemetering system as claimed in claim 1, wherein for each of plural figure places of the measurand there is provided said encoding means including said encoding plate, said plurality of first windings and said second winding, and said scanning circuit means includes a decoder, and one semiconductor switching element capable of connecting each of said first windings to said decoder and is operative to transmit through transmitting means to the central equipment, a measured value of the measurand as determined by the sensed mutual induction between each of said first winding and said second winding one after another of the figure places.
Claim 18
Dependent Claim
139 words
An induction type telemetering system as claimed in claim 1, wherein for each of plural figure places of the measurand there is provided said encoding means including said encoding plate, said plurality of first winding and said second winding, and said scanning circuit means includes a pair of decoders one semiconductor switching element capable of connecting each set of the corresponding semiconductor switching elements for the plural figure places of the measurand to one of said decoder, and one semiconductor switching element capable of connecting each of said second winding to the other decoder, said scanning circuit means being operative to transmit through transmitting means to the central equipment a measured value of the measurand as determined by the sensed mutual induction between each of the first windings and the second winding one after another of the figure places.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |