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US 3,944,969 AGranted
Central warning apparatus for vehicles
AssigneesNippondenso Co., Ltd., Toyota Jidosha Kogyo Kabushiki Kaisha
InventorsHiroshi Arai, Yohei Watanabe, Jun Ohta, Nobumasa Higo, Yasuhiko Sakurai
Life of this patent
Estimating the term…
Abstract
A central warning apparatus for vehicles which comprises a plurality of sensors mounted to the plurality of portions of vehicle to be inspected, discriminator circuits for discriminating an abnormal state of the sensors, display units connected to the discriminator circuits so as to be effected in response to the abnormal state, an OR-gate circuit connected to the output of respective discriminator circuits, and a main warning unit connected to the OR-gate circuit so as to be effected by an output therefrom for warning that there arises an abnormal state at at least one of portions to be inspected.
Claims11
A central warning apparatus for vehicles comprising:
- a plurality of sensors each mounted on a vehicle portion to be inspected and adapted to be shifted to a normal state when the portion is in a normal state and to an abnormal operation state when the portion is in an abnormal state,
- display means provided in correspondence with each said sensor for providing an output signal indicating abnormality of the respective portions to be inspected,
- checking means connected to said display means for selectively operating said display means so as to check the states of operation of said display means and said sensors,
- a plurality of discriminator circuits each connected between one of said sensors and said display means and to said checking means for producing an output signal to operate said display means when one of said sensors is in an abnormal state and for operating said display means, in a checking mode of operation, only when a respective series circuit consisting of said display means, said discriminator circuit and said sensor is formed,
- an OR-gate circuit connected to a plurality of said display means for generating an output signal in response to at least one output signal of one of said plurality of discriminator circuits, and
- a main warning circuit means connected to said OR-gate circuit for indicating abnormality of at least one of the plurality of portions to be inspected in response to an output signal of said OR-gate circuit.
3 more elements
A central warning apparatus for vehicles comprising:
- a plurality of sensors each mounted on a vehicle portion to be inspected and adapted to change resistance values thereof in response to changes from normal to abnormal states of the portions,
- display means provided in correspondence with said sensors for providing an output signal indicating abnormality of the respective portions to be inspected,
- checking means for selectively operating said display means for checking the states of operation of said display means and said sensors,
- a plurality of discriminator circuits each connected between one of said sensors and said display means and to said checking means for turning said display means into an ON or OFF state of operation in response to change of resistance values of said sensors and operating said display means, in a checking mode of operation, only when a respective series circuit consisting of said display means, said discriminator circuit and said sensor is formed,
- an OR-gate circuit connected to a plurality of said display means for generating an output signal in response to at least one output signal of said plurality of discriminator circuits, and
- a main warning circuit means connected to said OR-gate circuit for indicating abnormality of at least one of the plurality of portions to be inspected in response to an output signal of said OR-gate circuit.
3 more elements
A central warning apparatus for vehicles comprising:
- a plurality of condition sensors each mounted on a portion of the vehicle to be inspected and providing a first electrical output signal when a normal state is detected and a second electrical output signal when an abnormal state is detected,
- display means associated with each of said sensors for indicating an abnormal condition in response to production of said second electrical signal by the associated sensor,
- checking circuit means for operation to provide a check signal,
- discriminator circuit means connecting each of said sensors and said checking circuit to said display means so that one of said display means indicates an abnormal condition when a second output signal is produced by the associated sensor and so that each sensor is serially connected with said checking circuit means to cause the associated display means to produce an abnormal condition indication when that sensor is producing said first signal and said checking circuit means is operated,
- an OR-gate circuit connected to a plurality of said display means for producing an output signal when at least one of said display means is producing an abnormal indication, and
- main warning circuit means for indicating an abnormality warning whenever said OR-gate circuit produces its output signal.
3 more elements
Dependencies are inferred from the claim text.