Patent US3641471A successfully refreshed from Google Patents.
US3641471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjusting unit
Assignee: Preh GmbH
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Filing: 1969-08-04
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Granted: 1972-02-08
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Expires: 1989-08-04
Abstract
Abstract An adjusting unit for producing stored, selectively adjustable working voltages for control and tuning elements, more particularly varactors, comprising variable strip resistances for operation in a voltage divider circuit, said variable resistances being combined into a component, mutually releasable operating elements being mounted on the adjusting unit, said voltage dividers having wiper contacts selectively connectable to a contact rail and being adjustably movable along a track for varying the tapped voltage by means of said elements, said resistances having a common initial and end connecting rails, arranged substantially at right angles to them, and the resistance component representing a ladderlike structure with side rails corresponding to the initial and end rails and the rungs constituting resistances proper, said resistance component being made of a rectangular insulation plate provided with a homogeneous resistance layer for producing a nonlinear resistance curve by stamping out nonrectangular openings so that said resistance strips have different widths along said wiper track.
Inventors
- 👤 Wolfgang Labude
- 👤 Josef Kohler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:20
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/72; H01H13/74; H01C; H01C10/00; H01C10/30; H01C10/32; H01C10/36; H01C10/38; H01C10/40; H01C10/42; H01C10/50; H01C17/00; H01C17/22; H03; H03J; H03J1/00; H03J1/06; H03J1/066; H03J5/00; H03J5/02; H03J5/0218; H01H3/00; H01H3/02; H01H3/0213
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
157 words
Adjusting unit for producing stored, selectively adjustable working voltages for varactors, comprising variable strip resistances for operation in a voltage divider circuit, said variable resistances being combined into a component, mutually releasable operating elements being mounted on the adjusting unit, said voltage dividers having wiper contacts selectively connectable to a contact rail and being adjustably movable along a track for varying the tapped voltage by means of said elements, said resistances having a common initial and end connecting rails, arranged substantially at right angles to them, and the resistance component representing a ladderlike structure with side rails corresponding to the initial and end rails and the rungs constituting resistances proper, said resistance component being made of a rectangular insulation plate provided with a homogeneous resistance layer and two marginal strips with a conductive layer for producing a nonlinear resistance curve by stamping out nonrectangular openings so that said resistance strips have different widths along said wiper track.
Claim 2
Dependent Claim
157 words
Adjusting unit for producing stored, selectively adjustable working voltages for varactors, comprising variable strip resistances for operation in a voltage divider circuit, said variable resistances being combined into a component, mutually releasable operating elements being mounted on the adjusting unit, said voltage dividers having wiper contacts selectively connectable to a contact rail and being adjustably movable along a track for varying the tapped voltage by means of said elements, said resistances having a common initial and end connecting rails, arranged substantially at right angles to them, and the resistance component representing a ladderlike structure with side rails corresponding to the initial and end rails and the rungs constituting resistances proper, said resistance component being made of a rectangular insulation plate provided with a homogeneous resistance layer and two marginal strips with a conductive layer for producing a nonlinear resistance curve by stamping out nonrectangular openings so that said resistance strips have different widths along said wiper track.
Claim 3
Dependent Claim
26 words
Adjusting unit according to claim 1, in which the width of said homogeneous resistance layer surfaces varies along said wiper track for producing nonlinear voltage curves.
Claim 4
Dependent Claim
43 words
Adjusting unit according to claim 1, having said resistance component, for limiting the regulating range of said voltage dividers, provided with at least one basic resistance as a layer resistance, said layer being the same layer as that of said voltage divider elements.
Claim 5
Dependent Claim
35 words
Adjusting unit according to claim 3, having its said basic resistance formed as layer surface with a large length to breadth ratio, and having its connections provided on both long sides of the layer surface.
Claim 6
Dependent Claim
28 words
Adjusting unit according to claim 3 wherein said resistance layers of said basic resistance is partially removable to enable trimming of the regulating range of said voltage dividers.
Claim 7
Dependent Claim
100 words
Adjusting unit for producing stored, selectively adjustable working voltages for varactors, comprising variable strip resistances for operation in a voltage divider circuit, said variable resistances being combined into a component, mutually releasable operating elements being mounted on the adjusting unit, said voltage dividers having wiper contacts selectively connectable to a contact rail and being adjustably movable along a track for varying the tapped voltage by means of said elements, said resistance component comprising a rectangular insulating plate, conductive strips, being applied to opposite margins of said component, and between said strips being provided homogeneous resistance surfaces separated from each other.
Claim 8
Dependent Claim
100 words
Adjusting unit for producing stored, selectively adjustable working voltages for varactors, comprising variable strip resistances for operation in a voltage divider circuit, said variable resistances being combined into a component, mutually releasable operating elements being mounted on the adjusting unit, said voltage dividers having wiper contacts selectively connectable to a contact rail and being adjustably movable along a track for varying the tapped voltage by means of said elements, said resistance component comprising a rectangular insulating plate, conductive strips, being applied to opposite margins of said component, and between said strips being provided homogeneous resistance surfaces separated from each other.
Claim 9
Dependent Claim
26 words
Adjusting unit according to claim 6, in which the width of said homogeneous resistance layer surfaces varies along said wiper track for producing nonlinear voltage curves.
Claim 10
Dependent Claim
61 words
Adjusting unit according to claim 7, having its said resistance layer formed with a large length to breadth ratio, and having its connections provided on both long sides of the layer surface. 9, Adjusting unit according to claim 7 wherein said resistance layer of said basic resistance is partially removable to enable trimming of the regulating range of said voltage dividers.
References Cited (Backward Citations)
US2890432A
Cited
US3355694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |