US3922601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spiral plate yarn measuring capacitance cell
Assignee: EIDP Inc
•
Filing: 1974-03-01
•
Granted: 1975-11-25
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Expires: 1994-03-01
Abstract
Abstract A yarn measuring capacitor having substantially equidimensional helicoid electrical conducting strips insulated from each other and located coaxially of a moving yarn. The preferred embodiments do not require a free end of yarn for stringups.
Inventors
- 👤 Jr James H Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:46
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/12; G01B7/125
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
127 words
An apparatus for continuously measuring variations along the length of a moving elongate dielectric material, said apparatus comprising: spaced guide means for defining a path for said moving elongate dielectric material; a capacitance cell through which said material passes coaxially for distributing an electric field in a multiplicity of directions around said material within said capacitance cell, said capacitance cell comprising: two helicoid electrical conducting strips insulated from each other and coaxial with said path, said helicoid strips being fixed with respect to each other and in the form of a cylindrical structure with spiralled slots between said strips; and circuit means connected to said capacitance cell for providing said field and for measuring said variations along the length of said material passing through said capacitance cell.
Claim 2
Independent Claim
127 words
An apparatus for continuously measuring variations along the length of a moving elongate dielectric material, said apparatus comprising: spaced guide means for defining a path for said moving elongate dielectric material; a capacitance cell through which said material passes coaxially for distributing an electric field in a multiplicity of directions around said material within said capacitance cell, said capacitance cell comprising: two helicoid electrical conducting strips insulated from each other and coaxial with said path, said helicoid strips being fixed with respect to each other and in the form of a cylindrical structure with spiralled slots between said strips; and circuit means connected to said capacitance cell for providing said field and for measuring said variations along the length of said material passing through said capacitance cell.
Claim 3
Dependent Claim
25 words
The apparatus as defined in claim 1, said elongate dielectric material being yarn, said variations being changes in mass per unit length of said yarn.
Claim 4
Dependent Claim
18 words
The apparatus as defined in claim 1, said strips making at least about one turn around said path.
Claim 5
Dependent Claim
33 words
The apparatus as defined in claim 1, there being two pairs of helicoid strips each making less than one turn around said path and each pair being inverse with respect to the other.
Claim 6
Dependent Claim
20 words
The apparatus as defined in claim 1, one of said slots being filled with an insulator the other being open.
Claim 7
Dependent Claim
13 words
The apparatus as defined in claim 1, said strips being of equal length.
Claim 8
Dependent Claim
36 words
The apparatus as defined in claim 1, there being an equivalent area on one strip diametrically opposed from each specific area on the other strip, the equivalent and specific areas having the same magnitude of curvature.
Claim 9
Dependent Claim
35 words
The apparatus as defined in claim 1, including a shield surrounding said coiled conducting strips, there being a spiral slot in said shield in alignment with one of the slots defined by said coiled strips.
Claim 10
Dependent Claim
58 words
In a yarn handling system including spaced guide means defining a path of advance for said yarn, a measuring capacitor comprising: two helicoid electrical conducting strips insulated from each other and coaxial with said path, said helicoid strips having about the same pitch and diameter and being in the form of a double helix of the same hand.
Claim 11
Dependent Claim
58 words
In a yarn handling system including spaced guide means defining a path of advance for said yarn, a measuring capacitor comprising: two helicoid electrical conducting strips insulated from each other and coaxial with said path, said helicoid strips having about the same pitch and diameter and being in the form of a double helix of the same hand.
Claim 12
Dependent Claim
11 words
The system of claim 9, said strips being of equal length.
Claim 13
Dependent Claim
15 words
The system of claim 10, said strips making at least one turn around said path.
Claim 14
Dependent Claim
31 words
The system of claim 10, there being two pairs of helicoid strips each making less than one turn around said strand and each pair being inverse with respect to the other.
Claim 15
Dependent Claim
15 words
The system of claim 10, said strips making less than one turn around said strand.
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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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |