US4352203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Station selecting device
Assignee: Alps Alpine Co Ltd
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Filing: 1980-08-07
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Granted: 1982-09-28
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Expires: 2000-08-07
Abstract
Abstract A station selecting device which comprises: a plurality of variable resistors, grouped into several reception bands, the variable resistors in each group being connected in parallel; band selection switches for selectively supplying power to the variable resistors of the desired band; and channel selection switches for picking up the tuning voltage across the selected variable resistor, said each channel selection switch being connected to one of variable resistors of each band. Since each channel selection switch is connected to the variable resistor of each band, the number of the channel selection switches required are very few as compared with the conventional device, which in turn reduces the size of the device and makes the construction simple.
Inventors
- 👤 Wataru Ohkubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:07
CPC Classifications
H; H03; H03J; H03J5/00; H03J5/24; H03J5/242; H03J5/02; H03J5/0218
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
166 words
A device for selecting a desired channel from among a plurality of channels grouped into bands each containing a predetermined number of said channels; comprising a plurality of variable resistors each corresponding to a respective channel and connected so that the variable resistors corresponding to the channels of each band are connected in a respective parallel circuit with one another; supply means for selectively applying a voltage to each resistor of the parallel circuit containing a variable resistor corresponding to the desired channel, said supply means including a first switch for connecting a source of voltage to each resistor of the parallel circuit containing a variable resistor corresponding to the desired channel and a second switch for grounding each of said resistors connected to said source of voltage; and means including a plurality of channel switches each connected to one variable resistor only within each parallel circuit for enabling the desired channel to be selected by actuating only said supply means and an appropriate channel switch.
Claim 2
Independent Claim
166 words
A device for selecting a desired channel from among a plurality of channels grouped into bands each containing a predetermined number of said channels; comprising a plurality of variable resistors each corresponding to a respective channel and connected so that the variable resistors corresponding to the channels of each band are connected in a respective parallel circuit with one another; supply means for selectively applying a voltage to each resistor of the parallel circuit containing a variable resistor corresponding to the desired channel, said supply means including a first switch for connecting a source of voltage to each resistor of the parallel circuit containing a variable resistor corresponding to the desired channel and a second switch for grounding each of said resistors connected to said source of voltage; and means including a plurality of channel switches each connected to one variable resistor only within each parallel circuit for enabling the desired channel to be selected by actuating only said supply means and an appropriate channel switch.
Claim 3
Dependent Claim
21 words
A device according to claim 1, said first and second switches being interconnected for simultaneous actuation by actuating only one thereof.
References Cited (Backward Citations)
US3801915A
Cited
DE2814906A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |