US4242753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio transmitter time out timer
Assignee: Motorola Solutions Inc
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Filing: 1978-03-01
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Granted: 1980-12-30
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Expires: 1998-03-01
Abstract
Abstract A mobile data terminal system is capable of voice or microprocessor controlled data transmission over a keyed transmitter. The improved timer apparatus disables further transmission if the transmission duration or the average duty cycle over a predetermined time period of repeated transmitter keying exceed predetermined limits. Where the disable mode resulted from a microprocessor fault, the transmitter continues to be disabled until the microprocessor is reset.
Inventors
- 👤 Arman V. Dolikian
- 👤 Thomas A. Freeburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:47
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
88 words
A disable control circuit for a radio transmitter, said transmitter being both actuated and disabled by suitable actuation and disable control signals, comprising input means, for input of transmitter actuation control signals; detection means for detecting the average duty cycle, over a period of time, of repeating transmitter actuation control signals, and for producing a disable signal in response to said average duty cycle exceeding a predetermined limit; disable means, coupled to the detection means and the transmitter, for disabling the transmitter in response to said disable signal.
Claim 2
Dependent Claim
88 words
A disable control circuit for a radio transmitter, said transmitter being both actuated and disabled by suitable actuation and disable control signals, comprising input means, for input of transmitter actuation control signals; detection means for detecting the average duty cycle, over a period of time, of repeating transmitter actuation control signals, and for producing a disable signal in response to said average duty cycle exceeding a predetermined limit; disable means, coupled to the detection means and the transmitter, for disabling the transmitter in response to said disable signal.
Claim 3
Dependent Claim
35 words
A disable control circuit of claim 1 wherein the detection means further comprises: means for producing the disable signal in response to a continuous transmitter actuation control signal which remains continuous for predetermined time period.
Claim 4
Dependent Claim
48 words
The disable control circuit of claims 1 or 2 further comprising: reset input means for input of a reset signal reset means, coupled to the reset input, for enabling the transmitter by resetting the disable means in response to a reset signal occurring when the transmitter is disabled.
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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) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |