US3700992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curve tracer
Assignee: Coulter Electronics Inc
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Filing: 1971-07-26
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Granted: 1972-10-24
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Expires: 1991-07-26
Abstract
Abstract A curve tracer of two variables respectively represented on axes of variables Y and X on a recording rack, capable of being removed at a speed depending upon the first of the said variables, said tracer comprising a first regulation loop having a first movable organ, the removal of which is regulated by the variations of the second of the said variables, a second regulation loop having a second movable organ, allowing to trace a curve on the said recording rack, a scale transformation device, mechanically coupled with the first said movable organ and having a second recording rack on which is traced a scale transformation curve representing for each value to be transformed of the second variable, represented on the axis of X, a transformed value represented on the axis of Y, and detector means mounted in the second said regulation loop and adapted so as to be able to move along the axis of Y of the curve of the said second recording rack, the movement of the second movable organ being regulated by the movement of the detector means.
Inventors
- 👤 Jacques A Pontigny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:49
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/26
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
177 words
A curve tracer of two variables respectively represented on an axis of Y and an axis of X on a first recording rack, comprising means to move the said first recording rack at a speed depending upon the first of the said variables, a first regulation loop including a first movable organ the removal thereof being regulated by the variations of the second variable, a second regulation loop comprising a second movable organ permitting to trace a curve on said first recording rack, a scale transformation device mechanically coupled to the first said movable organ and including a second recording rack on which a scale transformation curve is traced, representing for each value to be transformed of the second variable, on the axis of X, a transformed value on the axis of Y, and detector means mounted in the second regulation loop and adapted to be movable along the axis of Y of the curve of the second recording rack, the removals of the second movable organ being regulated by the removals of the said detector means.
Claim 2
Dependent Claim
177 words
A curve tracer of two variables respectively represented on an axis of Y and an axis of X on a first recording rack, comprising means to move the said first recording rack at a speed depending upon the first of the said variables, a first regulation loop including a first movable organ the removal thereof being regulated by the variations of the second variable, a second regulation loop comprising a second movable organ permitting to trace a curve on said first recording rack, a scale transformation device mechanically coupled to the first said movable organ and including a second recording rack on which a scale transformation curve is traced, representing for each value to be transformed of the second variable, on the axis of X, a transformed value on the axis of Y, and detector means mounted in the second regulation loop and adapted to be movable along the axis of Y of the curve of the second recording rack, the removals of the second movable organ being regulated by the removals of the said detector means.
Claim 3
Dependent Claim
20 words
A curve tracer, as set forth in claim 1, in which the scale transformation device is a rotatably mounted cylinder.
Claim 4
Dependent Claim
23 words
A curve tracer, as set forth in claim 2, in which the cylinder is coupled to a slider of a coiled linear potentiometer.
Claim 5
Dependent Claim
40 words
A curve tracer, as set forth in claim 3 in which the potentiometer, the slider and the cylinder are drivingly connected to a motor-reducer, wherein the direction and speed of rotation thereof depend upon the variation of the second variable.
Claim 6
Dependent Claim
18 words
A curve tracer as set forth in claim 1, in which the detector means are of photo-electric structure.
Claim 7
Dependent Claim
84 words
A curve tracer as set forth in claim 5, in which the detector means comprise a luminous source and a set of two prisms constructed and adapted to be movable in relation to said second recording rack and a set of two photosensitive elements respectively associated to the two prisms, the mounting being such that said luminous source projects light on the said second recording rack and that the light, reflected by the latter, is sent back by the prisms on the photosensitive elements.
Claim 8
Dependent Claim
59 words
A curve tracer as set forth in claim 6, in which each of the prisms show in profile a right triangle the apexes of the triangles being joined, one of the sides adjacent the right angle of one of the triangles being aligned with the corresponding side of the other triangle, said sides being adjacent the second recording rack.
Claim 9
Dependent Claim
38 words
A curve tracer, as set forth in claim 7, in which the prisms have a right triangular cross-section, their apexes being aligned, the photo-sensitive elements being adjacent the respective faces of the prisms, opposed to their top edges.
Claim 10
Dependent Claim
47 words
A curve tracer as set forth in claim 7, in which the prisms are pyramidal having square bases, each prism side face adjacent to the second recording rack being perpendicular to its base, the apexes being joined, the photosensitive elements being respectively adjacent to each prism base.
Claim 11
Dependent Claim
32 words
A curve tracer as set forth in claim 7, in which the triangle sides adjacent to the second recording rack are parallel to the plane going through a generatrix of the cylinder.
Claim 12
Dependent Claim
16 words
A curve tracer as set forth in claim 6, in which the photosensitive elements are photoresistances.
Claim 13
Dependent Claim
40 words
A curve tracer as set forth in claim 11, in which the photoresistances are arranged in series with the terminals of a voltage source, their junction point having a differential signal which forms the variation signal of the regulation loop.
Claim 14
Dependent Claim
36 words
A curve tracer as set forth in claim 2 in which the first recording rack is mounted on a plate movable in a direction which is perpendicular to the cylinder axis and driveN by a motor.
Claim 15
Dependent Claim
19 words
A curve tracer as set forth in claim 13, in which the motor is a ''''Step by step'''' device.
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |