US5404391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incoming call alert system for cellular telephones without wired connection thereto
Assignee: 161058 CANADA Inc
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Filing: 1993-03-22
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Granted: 1995-04-04
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Expires: 2013-03-22
Abstract
Abstract Each of the cellular telephones is adapted to receive a paging signal and to transmit a voice channel signal on a voice channel frequency in response to the paging signal. The alert system includes a receiver tuned to receive the voice channel frequency. A trigger circuit is connected to the output of the receiver to be activated by the receiver when the receiver receives a voice channel signal on the voice channel frequency. An alert is produced by either an audio signal generator, a vibratory generator or a radio mute, and each of the latter is connected to the ouput of the trigger. Thus, an alert is provided on receipt of an incoming telephone call.
Inventors
- 👤 Daniel P. Wavroch
- 👤 Leonard Machado
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:03
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02; H04M; H04M19/00; H04M19/02; H04M19/04; H04M19/047
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
216 words
An incoming call alert system for use with cellular telephones, each said cellular telephone being able to receive a paging signal and to transmit a carrier signal on a voice channel frequency in response thereto; said call alert system comprising; receiver means tuned to receive said carrier signal on said voice channel frequency; trigger means connected to said receiver means and activated by said receiver means when said receiver means receives a voice channel signal on said voice channel frequency; and alert means connected to said trigger means and activated upon activation of said trigger means; comparator means connected between said receiver means and said trigger means; further including: time delay means for delaying the activation of said alert means; timer means connected to said trigger means, said alert means comprising: 1) means for producing an audio signal; 2) means for producing a vibration; 3) position selector means connected to said timer means; one position of said three position selector means being connected to said means for producing an audio signal; a second position of said three position selector means being connected to said means for producing a vibration; and a third position of said three position selector means being connected to both said means for producing an audio signal said means for producing a vibration.
Claim 2
Dependent Claim
216 words
An incoming call alert system for use with cellular telephones, each said cellular telephone being able to receive a paging signal and to transmit a carrier signal on a voice channel frequency in response thereto; said call alert system comprising; receiver means tuned to receive said carrier signal on said voice channel frequency; trigger means connected to said receiver means and activated by said receiver means when said receiver means receives a voice channel signal on said voice channel frequency; and alert means connected to said trigger means and activated upon activation of said trigger means; comparator means connected between said receiver means and said trigger means; further including: time delay means for delaying the activation of said alert means; timer means connected to said trigger means, said alert means comprising: 1) means for producing an audio signal; 2) means for producing a vibration; 3) position selector means connected to said timer means; one position of said three position selector means being connected to said means for producing an audio signal; a second position of said three position selector means being connected to said means for producing a vibration; and a third position of said three position selector means being connected to both said means for producing an audio signal said means for producing a vibration.
Claim 3
Dependent Claim
137 words
An incoming call alert system for use with cellular telephones, each said cellular telephone being able to receive a paging signal and to transmit a carrier signal on a voice channel frequency in response thereto; said call alert system comprising; receiver means tuned to receive said carrier signal on said voice channel frequency; trigger means connected to said receiver means and activated by said receiver means when said receiver means receives a voice channel signal on said voice channel frequency; and alert means connected to said trigger means and activated upon activation of said trigger means; comparator means connected between said receiver means and said trigger means; further including: time delay means for delaying the activation of said alert means; timer means connected to said trigger means, said alert means comprising a means for producing a vibration.
Claim 4
Dependent Claim
137 words
An incoming call alert system for use with cellular telephones, each said cellular telephone being able to receive a paging signal and to transmit a carrier signal on a voice channel frequency in response thereto; said call alert system comprising; receiver means tuned to receive said carrier signal on said voice channel frequency; trigger means connected to said receiver means and activated by said receiver means when said receiver means receives a voice channel signal on said voice channel frequency; and alert means connected to said trigger means and activated upon activation of said trigger means; comparator means connected between said receiver means and said trigger means; further including: time delay means for delaying the activation of said alert means; timer means connected to said trigger means, said alert means comprising a means for producing a vibration.
Claim 5
Dependent Claim
37 words
A system as defined in claim 2 wherein said means for producing a vibration comprises a motor driver connected to said timer means, a motor connected to said motor driver and a vibrator connected to said motor.
Claim 6
Dependent Claim
167 words
An incoming call alert system for use with cellular telephones, each said cellular telephone being able to receive a paging signal and to transmit a carrier signal on a voice channel frequency in response thereto, said system muting a radio on receipt of said voice channel carrier signal; said call alert system comprising: receiver means tuned to receive said carrier signal on said voice channel frequency; trigger means connected to said receiver means and activated by said receiver means when said receiver means receives voice channel signal on said voice channel frequency; comparator means connected between said receiver means and said trigger means; time delay means for delaying the activation of said alert means; timer means connected to said trigger means; and alert means connected to said trigger means and activated upon activation of said trigger means; said alert means comprising a relay connected to an audio disconnect in said radio; whereupon, on receipt of said voice channel signal, the audio signal of said radio is disconnected.
Claim 7
Dependent Claim
167 words
An incoming call alert system for use with cellular telephones, each said cellular telephone being able to receive a paging signal and to transmit a carrier signal on a voice channel frequency in response thereto, said system muting a radio on receipt of said voice channel carrier signal; said call alert system comprising: receiver means tuned to receive said carrier signal on said voice channel frequency; trigger means connected to said receiver means and activated by said receiver means when said receiver means receives voice channel signal on said voice channel frequency; comparator means connected between said receiver means and said trigger means; time delay means for delaying the activation of said alert means; timer means connected to said trigger means; and alert means connected to said trigger means and activated upon activation of said trigger means; said alert means comprising a relay connected to an audio disconnect in said radio; whereupon, on receipt of said voice channel signal, the audio signal of said radio is disconnected.
Claim 8
Dependent Claim
52 words
A system as defined in claim 4 wherein said alert means comprises means for producing an audio signal, and said means for producing an audio signal comprises: an audio generator connected to said timer means; an audio driver connected to said audio generator; and a sound transducer connected to said audio driver.
Claim 9
Dependent Claim
22 words
A system as defined in claim 5 and including an audio level selector connected between said audio driver and said sound transducer.
Claim 10
Dependent Claim
15 words
A system as defined in claim 6 wherein said sound transducer comprises a piezoelectric device.
Claim 11
Dependent Claim
145 words
An incoming call alert system for use with cellular telephones, each said cellular telephone being able to receive a paging signal and to transmit a carrier signal on a voice channel frequency in response thereto, said voice channel frequency being a frequency selected from a predetermined frequency band; said call alert system comprising: receiver means tuned to receive said carrier signal on said voice channel frequency by sweeping said band; trigger means connected to said receiver means and activated by said receiver means when said receiver means receives a voice channel signal on said voice channel frequency and when said voice channel signal has an amplitude above a predetermined threshold indicative that said receiver means are proximate said cellular telephone; and alert means connected to said trigger means and activated upon activation of said trigger means; whereby, to provide an alert to an incoming call.
Claim 12
Dependent Claim
145 words
An incoming call alert system for use with cellular telephones, each said cellular telephone being able to receive a paging signal and to transmit a carrier signal on a voice channel frequency in response thereto, said voice channel frequency being a frequency selected from a predetermined frequency band; said call alert system comprising: receiver means tuned to receive said carrier signal on said voice channel frequency by sweeping said band; trigger means connected to said receiver means and activated by said receiver means when said receiver means receives a voice channel signal on said voice channel frequency and when said voice channel signal has an amplitude above a predetermined threshold indicative that said receiver means are proximate said cellular telephone; and alert means connected to said trigger means and activated upon activation of said trigger means; whereby, to provide an alert to an incoming call.
Claim 13
Dependent Claim
41 words
A system as defined in claim 8 wherein said carrier signal is modulated by a modulating signal; said receiver means including means for demodulating said carrier signal to recover said modulating signal; said trigger means being activated by said modulating signal.
Claim 14
Dependent Claim
15 words
A system as defined in claim 1 and further comprising means for adjusting said threshold.
Claim 15
Dependent Claim
51 words
A system as defined in claim 10 for use in muting a radio on receipt of said voice channel signal; wherein, said alert means comprises a switch connected to an audio disconnect in said radio; whereupon, on receipt of said voice channel signal, the audio signal of said radio is disconnected.
Claim 16
Dependent Claim
21 words
A system as defined in claim 10 and further including time delay means for delaying the activation of said alert means.
Claim 17
Dependent Claim
18 words
A system as defined in claim 12 and further including a timer means connected to said trigger means.
Claim 18
Dependent Claim
18 words
A system as defined in claim 12 wherein said alert means comprises means for producing an audio signal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-03 | 1998-10-03 | 1999-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-03 | 2002-10-03 | 2003-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-03 | 2006-10-03 | 2007-04-04 | $7700.00 | Window Closed / Lapsed |