US4195263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective call radio communication receiver
Assignee: NEC Corp
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Filing: 1977-10-26
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Granted: 1980-03-25
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Expires: 1997-10-26
Abstract
Abstract A paging or like radio communication receiver is disclosed having a crystal oscillator circuit which is connected directly with a power source and is thus held continuously in oscillation at its preset level of frequency irrespective of whether the power supply ON/OFF switch is closed or not. The novel arrangement enables the receiver to produce a normal quality call sound whenever the swtich is closed and the proper signal is received, even at the instant of its start, and substantially extends the service life of the battery.
Inventors
- 👤 Masaru Masaki
- 👤 Akio Yotsutani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:01
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02; H04W88/022; G; G08; G08B; G08B3/00; G08B3/10; G08B3/1008; G08B3/1016; G08B3/1025; G08B3/1066; H04B; H04B1/00; H04B1/06; H04B1/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A selective call radio communication receiver of the type including a radio receiver circuit adapted to demodulate the radio frequency selecting signal received, a decoder circuit for decoding the demodulated selecting signal, a crystal oscillator circuit connected to the decoder circuit for producing different timing functions, and a battery, the improvement comprising: connection means directly and continuously connecting at least said crystal oscillator circuit with said battery; and switch means for selectively connecting the radio receiver circuit with said battery, said switch means being switchable between a first position in which said receiver is inoperable and a second position in which said receiver is operable, said crystal oscillator circuit being energized at all times regardless of the position of said switch means.
Claim 2
Dependent Claim
122 words
A selective call radio communication receiver of the type including a radio receiver circuit adapted to demodulate the radio frequency selecting signal received, a decoder circuit for decoding the demodulated selecting signal, a crystal oscillator circuit connected to the decoder circuit for producing different timing functions, and a battery, the improvement comprising: connection means directly and continuously connecting at least said crystal oscillator circuit with said battery; and switch means for selectively connecting the radio receiver circuit with said battery, said switch means being switchable between a first position in which said receiver is inoperable and a second position in which said receiver is operable, said crystal oscillator circuit being energized at all times regardless of the position of said switch means.
References Cited (Backward Citations)
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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) | 1983-03-25 | 1983-09-24 | 1984-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-25 | 1987-09-24 | 1988-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-25 | 1991-09-24 | 1992-03-25 | $7700.00 | Window Closed / Lapsed |