US3638174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote control methods and systems
Assignee: Bendix Corp
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Filing: 1969-05-27
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Granted: 1972-01-25
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Expires: 1989-05-27
Abstract
Abstract This invention relates to improvements in remote control systems and operating methods. The embodiment selected for illustration is arranged for actuation of a valve in a submerged pipeline. The system includes a controlling station comprising a transmitter and a receiver of sonic signals and it includes a controlled station submerged with the valve and comprised of a receiver and a transmitter. The controlling station is capable of sending arming, interrogation and control signals to the controlled station. The operating and interrogating codes employed in the system include at least two different frequency components and require that certain other frequency components be absent. The receiver of the control station is responsive to such codes to arm the receiver to receive an interrogation signal and an actuating command signal. It is effective upon receiving the interrogation signal to cause a response to be transmitted indicating the condition of the valve to be controlled and placing the system in condition to receive valve control instruction.
Inventors
- 👤 Wallace H Haase
- 👤 Albie Alton Lyman Jr
- 👤 Daniel W Painter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:00
CPC Classifications
G; G08; G08C; G08C23/00; G08C23/02; Y; Y10; Y10S; Y10S367/00; Y10S367/901
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
150 words
In the method of receiving a control signal at a remote station from a control station and furnishing a signal at the remote station only if the control signal includes components at a plurality of frequencies, the improvement which comprises the steps of: determining if said control signal includes each component of a first plurality of frequency components simultaneously for a predetermined period and only if it does, subsequently determining if said signal further includes, simultaneously with one another and with said first plurality of components, a second plurality of frequency components; and furnishing said signal if said control signal is determined to include said first and second plurality of frequency components and if the components of said first plurality are simultaneously received for said period and if the components of said second plurality of components are received thereafter simultaneously with one another and with said first plurality of components.
Claim 2
Dependent Claim
150 words
In the method of receiving a control signal at a remote station from a control station and furnishing a signal at the remote station only if the control signal includes components at a plurality of frequencies, the improvement which comprises the steps of: determining if said control signal includes each component of a first plurality of frequency components simultaneously for a predetermined period and only if it does, subsequently determining if said signal further includes, simultaneously with one another and with said first plurality of components, a second plurality of frequency components; and furnishing said signal if said control signal is determined to include said first and second plurality of frequency components and if the components of said first plurality are simultaneously received for said period and if the components of said second plurality of components are received thereafter simultaneously with one another and with said first plurality of components.
Claim 3
Dependent Claim
54 words
The invention defined in claim 1 which comprises the further step of determining whether any of a third plurality of frequency components have been received at said remote station with said control signal; and failing to furnish said signal if any component of said third plurality of signal components is received during said period.
Claim 4
Dependent Claim
71 words
The invention defined in claim 2, which comprises the preliminary steps of transmitting less than all the first plurality of components of said control signal for a time prior to said predetermined period and undertaking to determine if said first plurality of components is contained in the control signal for said predetermined period only if said signal has been determined to include less than all of them at said previous time.
Claim 5
Dependent Claim
71 words
The invention defined in claim 3 including the further step of transmitting a status signal from the remote station at a given interval following receipt of said control signal with less than all of said first plurality of components, and counting time from the time of transmission of said control signal with less than all of said first plurality of components until receipt at the controlling station of the status signal.
Claim 6
Dependent Claim
140 words
In a high security signalling system in which a remote receiving station is to respond only to signals from a controlling transmitting station; the improvement which comprises: means at the transmitting station for sending the signal for a period of time which for a first portion of that period includes a component at a first given frequency and does not include a component at a second given frequency, and which in a subsequent portion of the same period, includes components at both of said first and second given frequencies; and means at the remote station for receiving the signal and for responding thereto by placing itself in condition to respond to simultaneous receipt of the components at first and second frequency if, prior to their receipt, it receives a component at first frequency and not the component at second frequency.
Claim 7
Dependent Claim
140 words
In a high security signalling system in which a remote receiving station is to respond only to signals from a controlling transmitting station; the improvement which comprises: means at the transmitting station for sending the signal for a period of time which for a first portion of that period includes a component at a first given frequency and does not include a component at a second given frequency, and which in a subsequent portion of the same period, includes components at both of said first and second given frequencies; and means at the remote station for receiving the signal and for responding thereto by placing itself in condition to respond to simultaneous receipt of the components at first and second frequency if, prior to their receipt, it receives a component at first frequency and not the component at second frequency.
Claim 8
Dependent Claim
156 words
The invention defined in claim 5 in which said subsequent portion of the period constitutes a time period having not less than a given duration and in which said means at the transmitting station for sending a signal includes means for sending a signal including said component at first frequency and said component at second frequency simultaneously throughout said given period; and in which said means at the remote station for receiving the signal includes an arming apparatus whose state can be changed, and means for changing the state of said arming apparatus if, but only if, the signal received at said remote station includes a component at said first given frequency and a component at said second given frequency simultaneously for not less than said given time and only if the signal received at said remote station fails to include components at either of two other given frequencies at any time during said given time.
Claim 9
Dependent Claim
65 words
The invention defined in claim 6 which further comprises means at said transmitting station for sending a second signal incorporating frequency components at other than said first and second given frequencies simultaneously with the sending of said first mentioned signal; said remote station further comprising means for performing a controlled function in response to receipt of said second signal while said arming apparatus is armed.
Claim 10
Dependent Claim
87 words
The invention defined in claim 7 in which said remote station comprises means for providing a signal indicative of the state of the controlled function and a transmitter responsive thereto and to receipt by said remote station of a signal including component at said first given frequency in the absence of a component at said second given frequency for transmitting a signal indicative of the state of said condition, and in which said transmitting station includes receiving means for receiving a signal transmitted by said remote station.
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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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |