US3732513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Position-measuring transformer and scale member
Assignee: Inductosyn Corp
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Filing: 1971-10-14
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Granted: 1973-05-08
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Expires: 1991-10-14
Abstract
Abstract Disclosed is an improved scale winding member which is one member of a two-member position-measuring transformer. The two members are relatively movable with respect to each other in the direction of measurement. The scale winding member is formed from a plurality of individual units, frequently called bar scales or scale units. Each scale unit includes a winding section supported on a separate base. A plurality of the scale units are positioned end to end with the winding sections from each electrically interconnected to form the continuous scale winding. Each winding section includes active conductors, having a fine pitch, transverse to the direction of relative movement. The active conductors are connected in series by end conductors where the end conductors extend parallel to the direction of relative movement. Return conductors are positioned opposite and parallel to the end conductors to neutralize unwanted fields. The individual winding section on one scale unit is electrically connected to the individual winding section of an adjacent scale unit by pairs of interconnecting conductors. Each conductor in each pair is substantially identically arrayed in space to mate with the other conductor in the pair and each conductor conducts with a current equal to but in the opposite direction of the current in the other conductor of the pair to neutralize unwanted coupling. The pairs of conductors are formed with one conductor from one scale unit and the other conductor from the abutting scale unit. The interconnecting conductors from return conductors on each unit are paired together as are interconnecting conductors from end conductors so that all paired conductors carry equal current.
Inventors
- 👤 C Farrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:47
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/204; G01D5/2066; H; H01; H01F; H01F29/00; H01F29/08; H01F29/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A position-measuring transformer member comprising a plurality of winding for end-to-end placement to form a continuous winding, wherein each winding section includes active conductors connected in series and wherein each active conductor conducts in a direction opposite to the direction of conduction of each adjacent active conductor, characterized by terminal conductors at each end of each winding section, said terminal conductors consisting of a pair of conductors carrying current in opposite directions and terminating in a socket member and a coaxial cable member fitting the socket members of adjoining sections to connect one winding section in series with an adjoining section without producing an unwanted loop field.
Claim 2
Dependent Claim
107 words
A position-measuring transformer member comprising a plurality of winding for end-to-end placement to form a continuous winding, wherein each winding section includes active conductors connected in series and wherein each active conductor conducts in a direction opposite to the direction of conduction of each adjacent active conductor, characterized by terminal conductors at each end of each winding section, said terminal conductors consisting of a pair of conductors carrying current in opposite directions and terminating in a socket member and a coaxial cable member fitting the socket members of adjoining sections to connect one winding section in series with an adjoining section without producing an unwanted loop field.
Claim 3
Dependent Claim
85 words
Transformer member according to claim 1, each winding section having a winding having end conductors connecting parallel active conductors of the winding in series, each winding section having a base, return conductors arranged at opposite sides of the winding of each section parallel to said end conductors, each end of the base of each section having three terminal connections whereof two terminal connections are for said return conductors and are arranged at opposite sides of a terminal connection for an end conductor of the winding.
Claim 4
Dependent Claim
64 words
Transformer member according to claim 2, said terminal connections at one end of each base having a shape and location, the same as the shape and location of the terminal connections at the opposite end of each base whereby, when two of said bases are placed end-to-end, the terminal connections at the adjoining ends of said bases coincide and carry current in opposite directions.
Claim 5
Dependent Claim
61 words
Transformer member according to claim 3, the winding of each section having its active conductors arranged in a plane, the said terminal connections at both ends of the base being arranged in other planes at right angles to the first-mentioned plane, said terminal connections at each end of the base being arranged in a recess in the end of the base.
Claim 6
Dependent Claim
245 words
A position-measuring transformer having relatively movable, inductively coupled members, one of said members including a plurality of scale sections placed end-to-end and interconnected to form a continuous scale winding, wherein each scale section includes a base of magnetic material having a winding section having active conductors arrayed with a fine pitch and extending transversely to the direction of relative movement of said members and connected in series by end conductors parallel to the direction of relative movement of said members, and wherein each active conductor conducts in a direction opposite to the direction of conduction of each adjacent conductor, said winding having return conductors and terminal connections for said winding section and for said return conductors; characterized in this that said terminal connections at one end of said base have a shape and location, the same as the shape and location of the terminal connections at the opposite end of said base whereby, when two of said bases are placed end-to-end, the terminal connections at the adjoining ends of said bases coincide and carry current in opposite directions, said terminal connections at each end of the base having extensions arranged in a recess in the base, said extensions being arranged in pairs and carrying current in opposite directions, coaxial connectors for said extensions between the bottom and the top of the base and a coaxial cable for interconnecting adjacent scale sections to extend the scale winding from one scale section to the other scale section.
Claim 7
Dependent Claim
245 words
A position-measuring transformer having relatively movable, inductively coupled members, one of said members including a plurality of scale sections placed end-to-end and interconnected to form a continuous scale winding, wherein each scale section includes a base of magnetic material having a winding section having active conductors arrayed with a fine pitch and extending transversely to the direction of relative movement of said members and connected in series by end conductors parallel to the direction of relative movement of said members, and wherein each active conductor conducts in a direction opposite to the direction of conduction of each adjacent conductor, said winding having return conductors and terminal connections for said winding section and for said return conductors; characterized in this that said terminal connections at one end of said base have a shape and location, the same as the shape and location of the terminal connections at the opposite end of said base whereby, when two of said bases are placed end-to-end, the terminal connections at the adjoining ends of said bases coincide and carry current in opposite directions, said terminal connections at each end of the base having extensions arranged in a recess in the base, said extensions being arranged in pairs and carrying current in opposite directions, coaxial connectors for said extensions between the bottom and the top of the base and a coaxial cable for interconnecting adjacent scale sections to extend the scale winding from one scale section to the other scale section.
References Cited (Backward Citations)
US3181095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |