Patent US4027223A successfully refreshed from Google Patents.
US4027223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transceiver polarity protector
Assignee: Individual
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Filing: 1976-07-06
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Granted: 1977-05-31
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Expires: 1996-07-06
Abstract
Abstract A protective device for portable transceivers to assure that improper polarity is not applied to the power input. Two relays, oppositely polarized from each other by use of diodes, sense the applied power polarity and connect that power so that the power applied to the transceivers is always correct.
Inventors
- 👤 Frank G. Renz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:27
CPC Classifications
H; H02; H02H; H02H11/00; H02H11/002
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
261 words
An apparatus for protecting a mobile transceiver from the application of reversed polarity battery power comprising: a first input terminal means; a first power buss means electrically connected to the first input terminal means; a second input terminal means; a second power buss means electrically connected to the second input terminal means; a first polarity sensing control means electrically connected to both the first power buss means and the second power buss means whereby said first polarity sensing control means is subjected to the voltage between the first power buss means and the second power buss means; a second polarity sensing control means electrically connected to both the first power buss means and the second power buss means, with its polarity of activation reversed from the polarity of activation of the first polarity sensing control means, whereby said second polarity sensing control means is also subjected to the voltage between the first power buss means and the second power buss means; a positive output terminal means; a negative output terminal means; a first contact means, connected to and activated by the first polarity sensing control means, when not activated connecting the positive output terminal means to the second power buss means, and, when activated, connecting the positive output terminal means to the first power buss means; and a second contact means, connected to and activated by the second polarity sensing control means, when not activated connecting the negative output terminal means to the second power buss means, and, when activated, connecting the negative output terminal to the first power buss means.
Claim 2
Independent Claim
261 words
An apparatus for protecting a mobile transceiver from the application of reversed polarity battery power comprising: a first input terminal means; a first power buss means electrically connected to the first input terminal means; a second input terminal means; a second power buss means electrically connected to the second input terminal means; a first polarity sensing control means electrically connected to both the first power buss means and the second power buss means whereby said first polarity sensing control means is subjected to the voltage between the first power buss means and the second power buss means; a second polarity sensing control means electrically connected to both the first power buss means and the second power buss means, with its polarity of activation reversed from the polarity of activation of the first polarity sensing control means, whereby said second polarity sensing control means is also subjected to the voltage between the first power buss means and the second power buss means; a positive output terminal means; a negative output terminal means; a first contact means, connected to and activated by the first polarity sensing control means, when not activated connecting the positive output terminal means to the second power buss means, and, when activated, connecting the positive output terminal means to the first power buss means; and a second contact means, connected to and activated by the second polarity sensing control means, when not activated connecting the negative output terminal means to the second power buss means, and, when activated, connecting the negative output terminal to the first power buss means.
Claim 3
Dependent Claim
102 words
An apparatus for protecting a mobile transceiver from the application of reversed polarity battery power as in claim 1 wherein: the first polarity sensing control means is a first relay coil in series with a first semiconductor diode; the first contact means is a set of contacts activated by the first relay coil; the second polarity sensing control means is a second relay coil in series with a second semiconductor diode, the polarity of said second semiconductor being reversed from that of the first semiconductor diode; and the second contact means is a set of contacts activated by the second relay coil.
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) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |