US3739187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote switching system
Assignee: TE Connectivity Corp
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Filing: 1972-09-12
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Granted: 1973-06-12
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Expires: 1992-09-12
Abstract
Abstract A remote switching system suitable for an automobile employs a power circuit supplied by the automobile battery and connected through electrical gates to loads such as lamps, windscreen wiper motor etc., the loads being associated with manual switches at the driving position, each of which when operated causes a unique binary signal to be emitted from an encoder, the bits of the binary signal being derived on different ones of parallel spaced conductors which transmit the binary signal to decoders associated respectively with the loads, one of the decoders reacting to a particular unique binary signal to open or close the associated electrical gate thus to connect or disconnect the load to or from the power circuit.
Inventors
- 👤 A Pottle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:42
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/30; G08C19/34; B; B60; B60R; B60R16/00; B60R16/02; B60R16/03; B60R16/0315
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
197 words
A switching system for a plurality of electrical loads, comprising a power circuit connected to the loads through respective electrical gates operable between open and closed conditions to admit power to or shut off power from the loads, each gate being operatively associated with a respective control device connected to a signal transmission path leading from an encoder common to the control devices and operatively connected to switches associated respectively with the loads, the transmission path being in the form of a cable carrying several conductors fed with switch signals from the encoder which is arranged to generate different binary electrical signals in response to respective actuation of the switches, the binary signals being transmitted along the several conductors, each conductor transmitting a respective bit of the signal according to a high or low potential, the order of bits in the signal being defined by the relative positions of the several conductors which are arranged at the encoder and at the different control devices in predetermined pattern in parallel spaced relation, the control devices each being sensitive to a respective binary signal and adapted on receipt of such signal to reverse the state of the associated gate.
Claim 2
Dependent Claim
197 words
A switching system for a plurality of electrical loads, comprising a power circuit connected to the loads through respective electrical gates operable between open and closed conditions to admit power to or shut off power from the loads, each gate being operatively associated with a respective control device connected to a signal transmission path leading from an encoder common to the control devices and operatively connected to switches associated respectively with the loads, the transmission path being in the form of a cable carrying several conductors fed with switch signals from the encoder which is arranged to generate different binary electrical signals in response to respective actuation of the switches, the binary signals being transmitted along the several conductors, each conductor transmitting a respective bit of the signal according to a high or low potential, the order of bits in the signal being defined by the relative positions of the several conductors which are arranged at the encoder and at the different control devices in predetermined pattern in parallel spaced relation, the control devices each being sensitive to a respective binary signal and adapted on receipt of such signal to reverse the state of the associated gate.
Claim 3
Dependent Claim
36 words
A switching system as claimed in claim 1, in which a single transmission path is common to all or several of the control devices which are connected in parallel at spaced locations along the transmission path.
Claim 4
Dependent Claim
21 words
A switching system as claimed in claim 1, in which each transmission path is in the form of flat flexible cable.
Claim 5
Dependent Claim
113 words
A switching system as claimed in claim 1, in which at least one of the control devices comprises a decoder having inputs connected to respective conductors of the associated transmission path and an output connected to the input of a receive bistable memory device, the receive bistable memory device having an output connected to the input of a respective one of the electrical gates, the decoder being adapted to supply an output signal to the receive bistable memory device in response to a respective binary signal output from the encoder to reverse the state of the output of the receive bistable memory device which in turn reverses the condition of the electrical gate.
Claim 6
Dependent Claim
177 words
A switching system as claimed in claim 1, in which at least one of the control devices comprises a decoder having inputs connected to respective conductors of the associated transmission path and an output connected to the input of a receive bistable memory device, the receive bistable memory device having an output connected to a direct set input of a further receive bistable memory device which has a toggle input supplied by an oscillator, the further receive bistable memory device having an output connected to the input of a respective one of the electrical gates, the decoder being adapted to supply an output signal to the receive bistable memory device in response to a respective binary signal output from the encoder to reverse the state of the output of the receive bistable memory device, the further receive bistable memory device being adapted to emit at its output a series of pulses providing the input to the direct set input is at a predetermined state, the series of pulses causing repetitive opening and shutting of the electrical gate.
Claim 7
Dependent Claim
30 words
A switching system as claimed in claim 5, in which the oscillator supplies the toggle input of the further receive bistable memory device via an additional conductor on the cable.
Claim 8
Dependent Claim
72 words
A switching system as claimed in claim 1, in which at least one of the control devices comprises a decoder having inputs connected to respective conductors of the associated transmission path and an output connected to the input of a receive bistable memory device, the receive bistable memory device having an output connected to the control electrode of a power transistor connected in series between the associated load and the power circuit.
Claim 9
Dependent Claim
90 words
A switching system as claimed in claim 1, in which at least one of the control devices comprises a decoder having inputs connected to respective conductors of the associated transmission path and an output connected to the input of a receive bistable memory device, the receive bistable memory device having an output connected to the control electrode of a switching transistor connected in series between an associated relay coil and the power circuit, the relay coil having a switch contact in series between the associated load and the power circuit.
Claim 10
Dependent Claim
45 words
A switching system as claimed in claim 1, in which the switches are manually operated momentary contact switches connected respectively through crossed inverters to the direct set inputs of switch bistable memory devices the outputs of which are connected to respective inputs of the encoder.
Claim 11
Dependent Claim
48 words
A switching system as claimed in claim 9, in which a common time delay unit is connected between all the outputs of the switch bistable memory devices and reset inputs of all the switch bistable memory devices, whereby an input signal to the encoder has a predetermined duration.
Claim 12
Dependent Claim
32 words
A switching system as claimed in claim 1, in which the encoder includes means responsive to two or more simultaneous signals at its inputs to prevent the encoder giving a false output.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |