US3711651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarity separation multiplex
Assignee: Individual
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Filing: 1970-12-30
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Granted: 1973-01-16
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Expires: 1990-12-30
Abstract
Abstract A method and apparatus for the transmission and reception of signals in separate communication channels by imposing modulation upon only that portion of a transmission carrier wave which lies above the average value, or only upon that portion which lies below the average value, or upon both portions independently but simultaneously, and then demodulating the two halves of the resulting signal envelope separately at the receiving end. The result of this technique is the creation of two channels selectable by polarity only. Transmission of the signal envelope from the transmitter to the receiver is accomplished by induction. Since the signal envelope is polarity modulated, the separate signal pulses may be amplitude and width modulated for transmission of complex information. Additional channels can, of course, be produced by combining the two basic channels.
Inventors
- 👤 R Connell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:38
CPC Classifications
H; H04; H04J; H04J7/00; H04J7/02
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
207 words
A polarity separation multiplex system comprising a transmitter and at least one inductively coupled receiver; said transmitter comprising means to generate a carrier wave, means connected to said generator and adapted to phase separate said carrier wave into two wave trains inverted with respect to each other, first amplifier means connected to amplify each said wave train, pulse gate means connected to each said amplifier means and adapted to be driven into conduction by each amplified wave train, modulator means connected to each said pulse gate means and adapted to control the level of conduction of said pulse gate by impressing information on said pulse in the form of amplitude and width modulation, second amplifier means connected to the output of each said pulse gate, and a center tapped transmitting loop connected to conduct one modulated pulse train on each half thereof; each said at least one receiver comprising a conductor formed into a receiving loop, at least one receiving channel connected to said receiving loop and comprising receiver amplifier means connected to said receiving loop, received signal detector means including automatic gain control means connected to said receiver amplifier means, output amplifier means connected to said detector means, and utilization means responsive to the received signals.
Claim 2
Dependent Claim
207 words
A polarity separation multiplex system comprising a transmitter and at least one inductively coupled receiver; said transmitter comprising means to generate a carrier wave, means connected to said generator and adapted to phase separate said carrier wave into two wave trains inverted with respect to each other, first amplifier means connected to amplify each said wave train, pulse gate means connected to each said amplifier means and adapted to be driven into conduction by each amplified wave train, modulator means connected to each said pulse gate means and adapted to control the level of conduction of said pulse gate by impressing information on said pulse in the form of amplitude and width modulation, second amplifier means connected to the output of each said pulse gate, and a center tapped transmitting loop connected to conduct one modulated pulse train on each half thereof; each said at least one receiver comprising a conductor formed into a receiving loop, at least one receiving channel connected to said receiving loop and comprising receiver amplifier means connected to said receiving loop, received signal detector means including automatic gain control means connected to said receiver amplifier means, output amplifier means connected to said detector means, and utilization means responsive to the received signals.
Claim 3
Dependent Claim
40 words
A polarity separation multiplex system according to claim 1, wherein said receiver comprises two identical receiving channels and said receiving loop comprises a center tapped coil, each of said channels being connected to one half of said center tapped coil.
Claim 4
Dependent Claim
40 words
A polarity separation multiplex system according to claim 1, further comprising switch means connected between said receiving loop and receiver amplifier means whereby the connection of said receiving loop can be reversed for reception of either of said pulse trains.
Claim 5
Dependent Claim
27 words
A polarity separation multiplex system according tO claim 1, further comprising means for converting the carrier wave generated by said carrier generating means into triangular shaped pulses.
Claim 6
Dependent Claim
16 words
A polarity separation multiplex system according to claim 1, further comprising automatic pulse height control means.
Claim 7
Dependent Claim
38 words
A polarity separation multiplex system according to claim 1, further comprising automatic slicing level control means in each said modulator adapted to adjust for variations in carrier level due to voltage fluctuations thereby assuring generation of modulated pulses.
Claim 8
Independent Claim
120 words
A method for providing guidance information signalling along a predetermined route through the use of a polarity separation multiplex system comprising the steps of: generating a carrier wave, phase separating said carrier wave into two wave trains inverted with respect to each other, impressing guidance information on at least one of said wave trains in the form of amplitude and width modulation, impressing both said wave trains onto a conductor extending along said route, placing a conductive coil of a receiver relative to said conductor to thereby inductively impress upon said coil said wave trains, and detecting by polarity separation at least one of said impressed wave trains whereby the guidance information on said one wave train will be received.
Claim 9
Independent Claim
120 words
A method for providing guidance information signalling along a predetermined route through the use of a polarity separation multiplex system comprising the steps of: generating a carrier wave, phase separating said carrier wave into two wave trains inverted with respect to each other, impressing guidance information on at least one of said wave trains in the form of amplitude and width modulation, impressing both said wave trains onto a conductor extending along said route, placing a conductive coil of a receiver relative to said conductor to thereby inductively impress upon said coil said wave trains, and detecting by polarity separation at least one of said impressed wave trains whereby the guidance information on said one wave train will be received.
Claim 10
Dependent Claim
45 words
A method according to claim 7, used as a guidance information signalling system and wherein said wave trains are modulated with directional guidance information so that ''''left'''' commands are received on one side of the conductor and ''''right'''' commands are received on the other side.
Claim 11
Dependent Claim
55 words
A method according to claim 7, used as a warning system in which a hazardous obstacle is surrounded by said conductor, said wave trains having ''''caution'''' and ''''stop'''' signals impressed thereon so that a ''''caution'''' signal is received when the conductor is approached and a ''''stop'''' signal is received when the conductor is passed over.
Claim 12
Independent Claim
117 words
A method for providing single and dual communication channels within a particular area by means of a polarity separation multiplex system comprising the steps of generating a carrier wave, phase separating said carrier wave into positive and negative wave trains, impressing information on at least one of said wave trains by height and width modulation, and impressing both said wave trains on a single conductor extending along a predetermined path, receiving said information by inductive coupling said wave trains onto receiver means having at least one coil positioned relative to said conductor and at least one receiving channel connected to said coil, and polarity separating the received wave trains and demodulating said pulses in said receiving channels.
Claim 13
Independent Claim
117 words
A method for providing single and dual communication channels within a particular area by means of a polarity separation multiplex system comprising the steps of generating a carrier wave, phase separating said carrier wave into positive and negative wave trains, impressing information on at least one of said wave trains by height and width modulation, and impressing both said wave trains on a single conductor extending along a predetermined path, receiving said information by inductive coupling said wave trains onto receiver means having at least one coil positioned relative to said conductor and at least one receiving channel connected to said coil, and polarity separating the received wave trains and demodulating said pulses in said receiving channels.
Claim 14
Dependent Claim
46 words
A method according to claim 10, used for a stereophonic sound system and wherein the step of receiving said information comprises inductively coupling said wave trains onto two receiver means each formed with identical structure but with reversed receiving coils to simultaneously receive both modulated trains.
Claim 15
Dependent Claim
31 words
A method according to claim 10, used for a confined area communication system wherein said conductor defines the boundary of the particular area and said receiver is kept within said boundaries.
Claim 16
Dependent Claim
47 words
A method according to claim 10 used as a highway advisory information system wherein said conductor extends parallel to and between traffic lanes with lanes on opposite sides of said conductor receiving separate instructions and road information according to the relative position with respect to said conductor.
Claim 17
Dependent Claim
33 words
A method according to claim 10, used as a two-way communication system within a sharply delineated area bound by said conductor wherein said conductor acts as both a transmitting and a receiving loop.
Claim 18
Dependent Claim
51 words
A method according to claim 10 wherein said conductive coil is a common center tapped coil having a receiving channel connected at each end thereof, each said channel includiNg amplifying and detecting means, both said wave trains being inductively impressed upon said coil, polarity separated and amplified separately by said channels.
Claim 19
Dependent Claim
61 words
A method according to claim 15 used as an automatic guidance information system wherein only one of said wave trains is modulated with ''''turn'''' information so that said ''''turn'''' information is received in one channel for ''''right turn'''' when on one side of the conductor and in the other channel for ''''left turn'''' when on the other side of the conductor.
Claim 20
Dependent Claim
112 words
A polarity separation multiplexing method for transmitting and receiving information over single and dual communication channels comprising the steps of generating a carrier wave, phase separating said carrier wave into two wave trains inverted with respect to each other, impressing said information onto at least one of said wave trains in the form of amplitude and width modulation, and impressing both said wave trains onto a conductor of substantial length, and placing a conductive coil of a receiver in proximity to said conductor whereby said wave trains are impressed on said coil, polarity separating and amplifying at least one of said wave trains impressed on said coil, and demodulating said received pulses.
Claim 21
Dependent Claim
112 words
A polarity separation multiplexing method for transmitting and receiving information over single and dual communication channels comprising the steps of generating a carrier wave, phase separating said carrier wave into two wave trains inverted with respect to each other, impressing said information onto at least one of said wave trains in the form of amplitude and width modulation, and impressing both said wave trains onto a conductor of substantial length, and placing a conductive coil of a receiver in proximity to said conductor whereby said wave trains are impressed on said coil, polarity separating and amplifying at least one of said wave trains impressed on said coil, and demodulating said received pulses.
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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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |