Patent US5457816A successfully refreshed from Google Patents.
US5457816A
Expired / Lapsed
US
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Scanning receiver with stored frequencies
Assignee: Faurecia Clarion Electronics Co Ltd
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Filing: 1993-07-01
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Granted: 1995-10-10
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Expires: 2013-07-01
Abstract
Abstract Receivable frequencies based on a predetermined instruction signal are scanned in a first direction and across a frequency range extending from a first start frequency to a first end frequency. The tuning is retraced to the first start frequency, and scanning is resumed in the opposite direction across a second frequency range extending from the first start frequency to a second end frequency. Next, tuning is retraced to the second start frequency and scanning is resumed in the first direction across a third frequency range extending from the first end frequency to a third end frequency. The scan operation is repeated until predetermined upper and lower frequency limits are reached. When one of the frequency limits are reached, scanning is performed for one or more frequency ranges in the opposite direction without retrace until the second frequency limit is reached.
Inventors
- 👤 Kazuo Koyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:52
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/18; H03J1/00; H03J1/0008; H03J1/0091; H04; H04H; H04H20/00; H04H20/20; H04H20/22; H04H20/26; H04H2201/00; H04H2201/10; H04H2201/13
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
159 words
A receiver for tuning receivable frequencies, comprising: means for tuning said receiver in a first direction from a first frequency to a first limit; means for resuming tuning to said first frequency from said first limit, and then for resuming tuning from said first frequency in a second direction, opposite said first direction, to a second limit; means for resuming tuning from said second limit to said first frequency; means for resuming tuning in said first direction from said first frequency to one of a third frequency and an upper tuning limit, if said upper tuning limit is tuned before said third frequency is tuned; means for resuming tuning from said third frequency or said upper tuning limit to said second limit; and means for resuming tuning in said second direction from said second limit to one of a fourth frequency and a lower tuning limit if said lower tuning limit is tuned before said fourth frequency is tuned.
Claim 2
Dependent Claim
159 words
A receiver for tuning receivable frequencies, comprising: means for tuning said receiver in a first direction from a first frequency to a first limit; means for resuming tuning to said first frequency from said first limit, and then for resuming tuning from said first frequency in a second direction, opposite said first direction, to a second limit; means for resuming tuning from said second limit to said first frequency; means for resuming tuning in said first direction from said first frequency to one of a third frequency and an upper tuning limit, if said upper tuning limit is tuned before said third frequency is tuned; means for resuming tuning from said third frequency or said upper tuning limit to said second limit; and means for resuming tuning in said second direction from said second limit to one of a fourth frequency and a lower tuning limit if said lower tuning limit is tuned before said fourth frequency is tuned.
Claim 3
Dependent Claim
44 words
A receiver according to claim 1, wherein: said first limit is located at an end of a first predetermined frequency range above said first frequency; and said second limit is located at an end of a second predetermined frequency range below said first frequency.
Claim 4
Dependent Claim
32 words
A receiver according to claim 1, wherein: said first limit is a first fixed frequency above said first frequency; and said second limit is a second fixed frequency below said first frequency.
Claim 5
Dependent Claim
61 words
A receiver according to claim 1, further comprising: means for detecting that said upper tuning limit is reached; and wherein said means for resuming tuning in said second direction from said second limit to one of said fourth frequency and said lower tuning limit is, responsive to said upper tuning limit being reached to resume tuning to said lower tuning limit.
Claim 6
Dependent Claim
61 words
A receiver according to claim 1, further comprising: means for detecting that said lower tuning limit is reached; and wherein said means for resuming tuning in said first direction from said first frequency to one of said third frequency and said upper tuning limit is responsive to said lower tuning limit being reached to resume tuning to said upper tuning limit.
Claim 7
Dependent Claim
14 words
A receiver according to claim 1, wherein said receivable frequencies contain an FM signal.
Claim 8
Dependent Claim
14 words
A receiver according to claim 1, wherein said receivable frequencies contain an AM signal.
Claim 9
Dependent Claim
46 words
A receiver according to claim 1, further comprising: means for sensing a radio signal having at least a predetermined signal strength; and means for one of stopping said tuning at said radio signal and storing said predetermined signal strength and a frequency of said radio signal.
Claim 10
Dependent Claim
63 words
A receiver according to claim 8, further comprising: means, when said predetermined signal strength and said frequency are stored, to continue said tuning and, whenever a signal strength, stronger signal strength than a stored signal strength is sensed, storing said stronger signal strength and a frequency related thereto; and at an end of said tuning, returning said tuning to a last stored frequency.
Claim 11
Dependent Claim
42 words
A receiver according to claim 9, further comprising: means for producing an audio frequency signal from said radio signal; means, responsive to said last stored frequency, for controlling a volume of said audio signal in response to a last stored signal strength.
Claim 12
Dependent Claim
37 words
A receiver according to claim 8, further comprising: means for sensing a predetermined program identification code in said radio signal; and said means for stopping being responsive only to radio signals containing said predetermined program identification code.
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) | 1998-10-09 | 1999-04-10 | 1999-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-09 | 2003-04-10 | 2003-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-09 | 2007-04-10 | 2007-10-10 | $7700.00 | Window Closed / Lapsed |