Train vehicle control apparatus
First Claim
Patent Images
1. In control apparatus responsive to the movement of a train vehicle, the combination of:
- means operative with said train vehicle for providing a first speed signal having a first polarity when said train vehicle is moving in a predetermined direction at a speed greater than a predetermined zero speed and having a second polarity when said train vehicle is not moving in said direction at greater than said predetermined zero speed,means operative with said train vehicle for providing a second speed signal having said first polarity when said train vehicle is moving at a speed greater than said predetermined zero speed and having said second polarity when said train vehicle is not moving at greater than said predetermined zero speed, andmeans for providing a vehicle control signal in response to each of said first speed signal and said second speed signal having said first polarity.
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Accused Products
Abstract
A train vehicle zero speed sensing apparatus is provided for operation with a pair of tachometers coupled to the drive mechanism of a train vehicle, such that zero speed or an equivalent zero speed of the vehicle is sensed, and any single failure is detectable and will not yield a false zero speed indication.
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Citations
8 Claims
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1. In control apparatus responsive to the movement of a train vehicle, the combination of:
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means operative with said train vehicle for providing a first speed signal having a first polarity when said train vehicle is moving in a predetermined direction at a speed greater than a predetermined zero speed and having a second polarity when said train vehicle is not moving in said direction at greater than said predetermined zero speed, means operative with said train vehicle for providing a second speed signal having said first polarity when said train vehicle is moving at a speed greater than said predetermined zero speed and having said second polarity when said train vehicle is not moving at greater than said predetermined zero speed, and means for providing a vehicle control signal in response to each of said first speed signal and said second speed signal having said first polarity. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In control apparatus responsive to the movement of a train vehicle, the combination of:
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means responsive to the movement speed of said train vehicle for providing at least two output signals in accordance with said speed, means responsive to one of said output signals for providing a first speed signal having a first polarity when said vehicle is moving in a first direction at an actual speed greater than a predetermined zero speed and having a second polarity when said vehicle is not moving at an actual speed greater than said predetermined zero speed, means responsive to another of said output signals for providing a second speed signal having said first polarity when said vehicle is moving in said first direction at an actual speed greater than said predetermined zero speed and having said second polarity when said vehicle is not moving at an actual speed greater than said predetermined zero speed, means for providing a first vehicle control signal in response to each of said first speed signal and said second speed signal having said first polarity, and means for providing a second vehicle control signal in response to each of said first speed signal and said second speed signal having said second polarity.
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Specification