US4239940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carrier current communications system
Assignee: Individual
•
Filing: 1978-12-26
•
Granted: 1980-12-16
•
Expires: 1998-12-26
Abstract
Abstract A plurality of transmitters and receivers arranged for carrier current communications are generally placed throughout a large building. The transmitters and receivers are coupled to selected portions of the power distribution system. The selected portions are stairwell exit and lighting risers emanating from the same location of contiguous circuit breakers. Coupling circuits are applied to both remote transceivers and the central station transceivers.
Inventors
- 👤 Bertrand Dorfman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:27
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/54; H02; H02J; H02J13/00; H02J13/13; H02J13/1311; H02J13/18; H02J13/333; H04B2203/00; H04B2203/54; H04B2203/5462; H04B2203/5466; Y; Y02; Y02B; Y02B90/00; Y02B90/20; Y04; Y04S; Y04S40/00; Y04S40/12; Y04S40/121
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
75 words
The method of transmitting and receiving electrical signals representing communication over an AC power distribution system in a large building comprising: (a) coupling a plurality of transmitters arranged and adapted for carrier current communications to a stairwell exit and lighting riser portion of the power distribution system, and (b) coupling a plurality of receivers arranged and adapted for carrier current communications to the same stairwell exit and lighting riser portion of the power distribution system.
Claim 2
Independent Claim
75 words
The method of transmitting and receiving electrical signals representing communication over an AC power distribution system in a large building comprising: (a) coupling a plurality of transmitters arranged and adapted for carrier current communications to a stairwell exit and lighting riser portion of the power distribution system, and (b) coupling a plurality of receivers arranged and adapted for carrier current communications to the same stairwell exit and lighting riser portion of the power distribution system.
Claim 3
Dependent Claim
42 words
The method according to claim 1 comprising: (a) connecting a plurality of terminal means to individual ones of the transmitters through multiplexers associated therewith, and (b) connecting a plurality of terminal means to individual ones of the receivers through multiplexers associated therewith.
Claim 4
Dependent Claim
26 words
The method according to claim 1 comprising coupling the transmitters and receivers to stairwell riser portions in the vicinity of the service core of the building.
Claim 5
Dependent Claim
29 words
The method according to claim 1 comprising coupling the transmitters and receivers to stairwell riser portions emanating from a common location of one or more contiguous circuit breaking apparatus.
Claim 6
Dependent Claim
22 words
The method according to claim 1 comprising placing the transmitters and receivers in the building stairwells with which their risers are associated.
Claim 7
Dependent Claim
102 words
The method according to claim 1 in which a transmitting and receiving central station is coupled to the stairwell and exit lighting riser comprising: (a) coupling the transmitting portion to the riser by an individual wire pair having significant reactive impedance, (b) tuning out the impedance at the center frequency of the transmitted signals, (c) coupling the receiving portion to the riser by an individual wire pair of significant reactive impedance, (d) tuning out the impedance at the center frequency of the received signals, and (e) coupling the wire pairs to the riser by coupling means having low impedance at radio frequencies.
Claim 8
Dependent Claim
28 words
The method according to claim 6 comprising coupling both wire pairs to the stairwell and exit lighting riser by capacitive coupling means having low impedance at radio frequencies.
Claim 9
Dependent Claim
18 words
The method according to claim 7 comprising placing inductance between the receiving portion and the capacitive coupling means.
Claim 10
Dependent Claim
25 words
The method according to claim 8 comprising connecting the central station to the riser side of circuit breaking means in the AC power distribution system.
Claim 11
Dependent Claim
29 words
The method according to claim 6 comprising presenting high impedance to the stairwell and exit lighting riser at the remote stations at the center frequency of the transmitted signals.
Claim 12
Dependent Claim
85 words
A carrier current communications system for a large building having AC power distribution means including stairwell exit and landing light power distribution risers comprising: (a) carrier current transmission means for transmitting signals, (b) carrier current receiving means for receiving signals, and (c) means for coupling the transmission means and the receiving means to portions of the AC power distribution means which are secure from excessive loading and physical disruption comprising means for coupling to the stairwell exit and landing risers for carrier current communications therebetween.
Claim 13
Dependent Claim
85 words
A carrier current communications system for a large building having AC power distribution means including stairwell exit and landing light power distribution risers comprising: (a) carrier current transmission means for transmitting signals, (b) carrier current receiving means for receiving signals, and (c) means for coupling the transmission means and the receiving means to portions of the AC power distribution means which are secure from excessive loading and physical disruption comprising means for coupling to the stairwell exit and landing risers for carrier current communications therebetween.
Claim 14
Dependent Claim
35 words
A carrier current system according to claim 11 in which the power distribution means are arranged and adapted to pass through the building in the vicinity of locations advantageous for the transmitting and receiving means.
Claim 15
Dependent Claim
21 words
A carrier current system according to claim 12 comprising means for securing the circuit breaker means from electrical and physical disruption.
Claim 16
Dependent Claim
21 words
A carrier current system according to claim 11 in which the power distribution means is distributed substantially uniformly throughout the building.
Claim 17
Dependent Claim
36 words
A carrier current system according to claim 14 in a building having a service core, in which the transmission means and receiving means are coupled to stairwell risers located in the vicinity of the service core.
Claim 18
Dependent Claim
29 words
A carrier current system according to claim 14 in which the transmission means and receiving means are located in the stairwells of the risers with which they are coupled.
Claim 19
Dependent Claim
52 words
A carrier current system according to claim 11 in a building having a plurality of contiguous circuit breaker means from which power distribution risers emanate in which the transmission means and the receiving means are coupled to stairwell risers emanating from at least one of a plurality of contiguous circuit breaker means.
Claim 20
Dependent Claim
21 words
A carrier current system according to claim 17 comprising means for securing the circuit breaker means from electrical and physical disruption.
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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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |