Patent US4779071A successfully refreshed from Google Patents.
US4779071A
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US
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System for transmitting commands
Assignee: PIANELLI E TRAVERSA INDUSTRIE Srl
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Filing: 1986-12-17
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Granted: 1988-10-18
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Expires: 2006-12-17
Abstract
Abstract A system is described for transmitting a plurality of commands to peripheral means, particularly to motor-driven transport means and principally to automatic carriages on rails for the overhead conveyance of material, which provides a main station that generates and sends command signals to the peripheral means which house on-board reception and handling circuits for the command signals. The main characteristic lies in the fact that the plurality of commands is obtained through a coded signal formed from a sine wave which is sent to the peripheral means through a single conductor.
Inventors
- 👤 Alberto Guglielmo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:49
CPC Classifications
B; B61; B61L; B61L23/00; B61L23/002; B61L23/005; B61L7/00; B61L7/06; B61L7/08; B61L7/083; G; G08; G08C; G08C19/00; G08C19/30
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
117 words
A system for the transmission of a plurality of commands to peripheral means, including: a main station that generates and sends command signals through a single conductor to the peripheral means which house on-board circuits for receiving and handling the command signals, wherein said plurality of commands is obtained by means of a coded signal formed from a sine wave; and electrical supply conductors which provide an electrical supply to the peripheral means and a conductor connected to earth, for constituting a return path for said command signals, wherein said single conductor is supplementary to said electrical supply and return path conductors; and wherein the sine wave is formed from the mains voltage of the electrical supply.
Claim 2
Independent Claim
117 words
A system for the transmission of a plurality of commands to peripheral means, including: a main station that generates and sends command signals through a single conductor to the peripheral means which house on-board circuits for receiving and handling the command signals, wherein said plurality of commands is obtained by means of a coded signal formed from a sine wave; and electrical supply conductors which provide an electrical supply to the peripheral means and a conductor connected to earth, for constituting a return path for said command signals, wherein said single conductor is supplementary to said electrical supply and return path conductors; and wherein the sine wave is formed from the mains voltage of the electrical supply.
Claim 3
Dependent Claim
41 words
A system for the transmission of a plurality of commands, according to claim 1, wherein said sine wve has a period equal to or one-half of a period of said mains voltage dependent on which of said commands is being sent.
Claim 4
Dependent Claim
51 words
A system for the transmission of a plurality of commands, according to claim 1, wherein circuits are provided on the peripheral means for detecting operational anomalies and sending indications of the irregular operating conditions of the peripheral means to the main station through a signal coding circuit and an auxiliary conductor.
Claim 5
Dependent Claim
29 words
A system for the transmission of a plurality of commands, according to claim 1, wherein said coded signal comprises a combination of sinusoidal half-waves formed from the mains voltage.
Claim 6
Dependent Claim
41 words
A system for the transmission of a plurality of commands, according to claim 4, including phase-changing means for generating from the mains voltage at least two sequences of half-waves which are out of phase by 180° with respect to each other.
Claim 7
Dependent Claim
32 words
A system for the transmission of a plurality of commands, according to claim 4, including rectifier means for generating from the mains voltage at least two sequences of half-waves with opposite polarities.
Claim 8
Dependent Claim
29 words
A system for the transmission of a plurality of commands, according to claim 1 including means for the switching and manual control of the operation of the peripheral means.
Claim 9
Dependent Claim
27 words
A system for the transmission of a plurality of commands, according to claim 1 including means for displaying visually the state of operation of the peripheral means.
Claim 10
Dependent Claim
31 words
A system for the transmission of a plurality of commands, according to claim 5, wherein combining means are provided for generating the coded signal from at least two of the sequences.
Claim 11
Dependent Claim
51 words
A system for the transmission of a plurality of commands, according to claim 9, wherein said combining means are located in the main station and produce eight different command signals from two of the sequences of half-waves with out-of-phase phases and from two of the sequences of half-waves with opposite polarities.
Claim 12
Dependent Claim
25 words
A system for the transmission of a plurality of commands, according to claim 9, wherein said combining means are also located on the peripheral means.
Claim 13
Dependent Claim
24 words
A system for the transmission of a plurality of commands, according to claim 9, wherein the combining means include controlled switches and adding circuits.
Claim 14
Dependent Claim
31 words
A system for the transmission of a plurality of commands, according to claim 6, wherein combining means are provided for generating the coded signal from at least two of the sequences.
Claim 15
Dependent Claim
51 words
A system for the transmission of a plurality of commands, according to claim 13, wherein said combining means are located in the main station and produce eight different command signals from two of the sequences of half-waves with out-of-phase phases and from two of the sequences of half-waves with opposite polarities.
Claim 16
Dependent Claim
25 words
A system for the transmission of a plurality of commands, according to claim 13, wherein said combining means are also located on the peripheral means.
Claim 17
Dependent Claim
24 words
A system for the transmission of a plurality of commands, according to claim 13, wherein the combining means include controlled switches and adding circuits.
Claim 18
Dependent Claim
81 words
A system for the transmission of a plurality of commands, according to claim 1 wherein decoding circuits are provided on the peripheral means for decoding the coded signal, including a circuit for generating synchronism signals and a sampling circuit, controlled by said synchronism signals, said generating circuit and sampling circuit being able to reconstitute the sequences of out-of-phase half-waves and half-waves with opposite polarities in order to form command signals to be sent to a control unit for the peripheral means.
Claim 19
Dependent Claim
31 words
A system for the transmission of a plurality of commands, according to claim 17, wherein the synchronism signal generating circuit comprises a transformer with a balanced output and two rectifier circuits.
Claim 20
Dependent Claim
40 words
A system for the transmission of a plurality of commands, according to claim 18, wherein the mains voltage is supplied to an input of the synchronism signal generating circuit and its output supplies a synchronism input of the sampling circuit.
Claim 21
Dependent Claim
52 words
A system for the transmission of a plurality of commands, according to claim 17, wherein the sampling circuit includes rectifier circuits receiving said command signals, squaring circuits receiving outputs of said rectifier circuits and logic gates of the AND or NAND type receiving outputs of said squaring circuits and said synchronism signals.
Claim 22
Dependent Claim
40 words
A system for the transmission of a plurality of commands, according to claim 20, wherein the mains voltage is supplied to an input of the synchronism signal generating circuit and its output supplies a synchronism input of the sampling circuit.
Claim 23
Dependent Claim
32 words
A system for the transmission of a plurality of commands, according to claim 20, wherein the coded signal on said single conductor is supplied to the signal inputs of the sampling circuit.
Claim 24
Dependent Claim
27 words
A system for the transmission of a plurality of commands, according to claim 17, wherein the decoding circuits include an integrator circuit for confirming the command signals.
References Cited (Backward Citations)
CH203276A
Cited
US3488517A
Cited
US4328482A
Cited
US4638299A
Cited
US4556865A
Cited
US4569045A
Cited
US4639714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |