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Patent US4237448A successfully refreshed from Google Patents.
US4237448A
Expired / Lapsed
US
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Pager with escalating audio alert signal level
Assignee: Motorola Solutions Inc
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Filing: 1979-04-30
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Granted: 1980-12-02
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Expires: 1999-04-30
Abstract
Abstract An alerting device, such as a radio pager, which produces an audible alerting signal includes a signal level control which causes the alerting signal to be initially produced at a low audio level, with the signal increasing or escalating to a higher audio level. The signal level can increase continuously in a smooth rise, or can increase in steps. The level control can include an attenuator which initially reduces the signal level, to which a control signal is applied to reduce the attenuation and increase the alerting signal. The attenuator can be coupled to an audio amplifier so that the overall gain of the signal applied to the transducer producing the audible signal is increased from an initial low signal level as the signal continues.
Inventors
- 👤 Morton Weinberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:38
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/02; G; G08; G08B; G08B3/00; G08B3/10; G08B3/1008; G08B3/1016; G08B3/1025; H03G1/0005; H03G1/0035; H03G1/0082
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
A control system for the audible alerting signal of paging apparatus which includes a decoder responsive to a received code for producing an output, a generator responsive to the decoder output for producing an electrical tone signal, and an audio transducer for producing the audible alerting signal from the electrical tone signal, said control system including in combination: signal translating means connecting the generator to the audio transducer for applying the electrical tone signal to the transducer; and level control means connected to said signal translating means and coupled to the decoder, said level control means causing said signal translating means to apply the electrical signal to the audio transducer at an initial low level and being responsive to the decoder output to cause said translating means to apply the electrical signal to the audio transducer at a higher level as the signal continues.
Claim 2
Dependent Claim
144 words
A control system for the audible alerting signal of paging apparatus which includes a decoder responsive to a received code for producing an output, a generator responsive to the decoder output for producing an electrical tone signal, and an audio transducer for producing the audible alerting signal from the electrical tone signal, said control system including in combination: signal translating means connecting the generator to the audio transducer for applying the electrical tone signal to the transducer; and level control means connected to said signal translating means and coupled to the decoder, said level control means causing said signal translating means to apply the electrical signal to the audio transducer at an initial low level and being responsive to the decoder output to cause said translating means to apply the electrical signal to the audio transducer at a higher level as the signal continues.
Claim 3
Dependent Claim
34 words
A control system in accordance with claim 1 wherein said signal translating means includes a signal attenuator, and said level control means applies a control signal to said attenuator for reducing the attenuation thereof.
Claim 4
Dependent Claim
38 words
A control system in accordance with claim 2 wherein said level control means applies a continuously variable control signal to said attenuator for reducing the attenuation thereof, so that the electrical signal applied to the transducer increases gradually.
Claim 5
Dependent Claim
41 words
A control system in accordance with claim 2 wherein said level control means applies a step wave control signal to said attenuator for reducing the attenuation thereof in steps, so that the electrical signal applied to the transducer increases in steps.
Claim 6
Dependent Claim
51 words
A control system in accordance with claim 1 wherein said signal translating means includes amplifier means for applying the elctrical tone signal to the audio transducer and adjustable means connected to said level control means and controlled thereby for increasing the level of the tone signal applied to the audio transducer.
Claim 7
Dependent Claim
37 words
A control system in accordance with claim 5 wherein said level control means responds to the decoder output to apply a continuously variable control signal to said adjustable means to control the level of the tone signal.
Claim 8
Dependent Claim
37 words
A control system in accordance with claim 5 wherein said level control means responds to the decoder output to apply a step wave control signal to said adjustable means to control the level of the tone signal.
References Cited (Backward Citations)
US4145684A
Cited
US4087793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |