US3581252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Potentiometer circuit arrangement for deriving a tuning voltage
Assignee: Wiener Schwachstromwerke GmbH
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Filing: 1968-09-23
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Granted: 1971-05-25
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Expires: 1988-09-23
Abstract
Abstract A circuit arrangement for deriving a tuning voltage for controlling a tuning capacitance includes a plurality of potentiometers connected to form a voltage divider, each having a resistance path and a tap. The tap is electrically connected to the resistance path, and the resistance paths are connected in series. A selector switch comprises a plurality of contacts, each connected to a respective one of the taps, and a contact arm selectively engageable with the contacts. Each potentiometer corresponds to a respective frequency range, such as a channel or a group of channels.
Inventors
- 👤 Franz Sacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:43
CPC Classifications
H; H03; H03J; H03J1/00; H03J1/06; H03J1/066
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
159 words
A potentiometer circuit arrangement, for deriving a tuning voltage for controlling a tuning capacitance such circuit arrangement comprising, in combination, a plurality of potentiometers each including a resistance path and a respective tap electrically connected to the associated resistance path; said resistance paths being connected in series between two terminals of a source of potential to form a voltage divider; each potentiometer corresponding to a respective frequency range having a respective tuning voltage range corresponding thereto; the respective resistance values of said resistance paths, in relation to the sum of the resistance values of all said resistance paths, being proportioNal to the respective tuning voltage ranges corresponding to the respective frequency ranges in relation to the sum of all said tuning voltage ranges; a selector switch having a plurality of contacts each connected to a respective one of said taps, and a movable contact arm engageable with said contacts; and a voltage-dependent tuning capacitance connected to said selector switch.
Claim 2
Dependent Claim
159 words
A potentiometer circuit arrangement, for deriving a tuning voltage for controlling a tuning capacitance such circuit arrangement comprising, in combination, a plurality of potentiometers each including a resistance path and a respective tap electrically connected to the associated resistance path; said resistance paths being connected in series between two terminals of a source of potential to form a voltage divider; each potentiometer corresponding to a respective frequency range having a respective tuning voltage range corresponding thereto; the respective resistance values of said resistance paths, in relation to the sum of the resistance values of all said resistance paths, being proportioNal to the respective tuning voltage ranges corresponding to the respective frequency ranges in relation to the sum of all said tuning voltage ranges; a selector switch having a plurality of contacts each connected to a respective one of said taps, and a movable contact arm engageable with said contacts; and a voltage-dependent tuning capacitance connected to said selector switch.
Claim 3
Dependent Claim
20 words
A potentiometer circuit arrangement, as claimed in claim 1, in which each of said frequency ranges comprises a frequency channel.
Claim 4
Dependent Claim
22 words
A potentiometer circuit arrangement, as claimed in claim 1, in which each of said frequency ranges comprises a group of frequency channels.
Claim 5
Dependent Claim
22 words
A potentiometer circuit arrangement, as claimed in claim 1, in which said selector switch includes additional contact means for frequency band selection.
Claim 6
Dependent Claim
63 words
A potentiometer circuit arrangement, as claimed in claim 1, including an adjusting device operatively associated with said selector switch to adjust the tap of a selected potentiometer to a resistance value corresponding to a selected frequency; and means operable to couple said adjusting device mechanically to the tap connected to the contact then engaged by the movable contact arm of said selector switch.
Claim 7
Dependent Claim
20 words
A potentiometer circuit arrangement, as claimed in claim 5, in which said adjusting device includes a speed reducing mechanical transmission.
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |