Safety system
First Claim
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1. A safety system comprising:
- an elongate signal carrying device including a wave carrying hollow tube with a first end and a second end and a fluid therein, at least a part of the hollow tube being manipulable at a manipulation point to generate a measurable non-electric acoustic signal that can be carried by the hollow tube;
an acoustic microphone detector for detecting the non-electric acoustic signal, the acoustic microphone detector outputting a detector output signal representing the non-electric acoustic signal;
a detector processing device that processes the detector output signal to detect a quiescent level of the detector output signal and to detect deviations from the quiescent level indicative of positive or negative changes in pressure in the fluid of the hollow tube, the detector processing device including a low pass filter that filters the detector output signal to remove a background non-electric signal therefrom, the detector processing device outputting a detector processing device output signal; and
an output device operatively connected to the detector processing device for causing an audible alarm signal, a visible alarm signal or an electric signal to be output in response to the detector processing device output signal.
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Abstract
This invention relates to a safety system comprising an elongate signal carrying device having a first end and a second end. At least a part of the elongate signal carrying device is selectively manipulable at a manipulation point to generate a measurable non-electric signal that can be carried by the signal carrying device. The safety system further comprises an output device for causing an audible or visible alarm signal or an electric signal to be outputted in response to the non-electric signal.
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Citations
32 Claims
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1. A safety system comprising:
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an elongate signal carrying device including a wave carrying hollow tube with a first end and a second end and a fluid therein, at least a part of the hollow tube being manipulable at a manipulation point to generate a measurable non-electric acoustic signal that can be carried by the hollow tube; an acoustic microphone detector for detecting the non-electric acoustic signal, the acoustic microphone detector outputting a detector output signal representing the non-electric acoustic signal; a detector processing device that processes the detector output signal to detect a quiescent level of the detector output signal and to detect deviations from the quiescent level indicative of positive or negative changes in pressure in the fluid of the hollow tube, the detector processing device including a low pass filter that filters the detector output signal to remove a background non-electric signal therefrom, the detector processing device outputting a detector processing device output signal; and an output device operatively connected to the detector processing device for causing an audible alarm signal, a visible alarm signal or an electric signal to be output in response to the detector processing device output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 32)
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24. A method for operating a safety system comprising:
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manipulating an elongate non-electric signal carrying hollow tube with a fluid therein at a manipulation point to generate a measurable non-electric acoustic signal in the hollow tube; detecting the acoustic signal with an acoustic microphone; outputting a detector output signal representing the non-electric acoustic signal from the acoustic microphone; filtering the detector output signal with a low pass filter to remove a background non-electric signal therefrom; processing the detector output signal to detect deviations from the quiescent level indicative of positive or negative changes in pressure in the fluid of the hollow tube; outputting a detector processing device output signal representing the filtered and processed detector output signal; outputting an audible alarm signal, a visible alarm signal or an electric signal with an output device in response to the detector processing device output signal. - View Dependent Claims (25, 26, 27, 28)
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29. A movable garage door system that comprises a garage door with a leading edge which in a closed position contacts the ground, wherein a signal carrying hollow tube is mounted on the leading edge, the signal carrying hollow tube having a first end and a second end and a fluid therein, at least a part of the hollow tube being manipulable at a manipulating point to generate a measurable non-electric acoustic signal that can be carried by the signal carrying hollow tube, the garage door system also comprising an acoustic microphone that detects the acoustic signal and that outputs a detector output signal representing the non-electric acoustic signal, the garage door system further comprising a detector processing device that processes the detector output signal to detect a quiescent level of the detector output signal and to detect deviations from the quiescent level indicative of positive or negative changes in pressure in the fluid of the hollow tube, the detector processing device including a low pass filter that filters the detector output signal to remove a background non-electric signal therefrom.
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30. A movable garage door edge safety assembly comprising:
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a movable garage door having a leading edge which in a closed position contacts the ground, wherein a signal carrying hollow tube with a fluid therein is mounted on the leading edge, the hollow tube being manipulable to generate a measurable non-electric acoustic signal that is carried by the hollow tube; an acoustic microphone that detects the measurable non-electric acoustic signal and that outputs a detector output signal representing the non-electric acoustic signal; a detector processing device that processes the detector output signal to detect a quiescent level of the detector output signal and to detect deviations from the quiescent level indicative of positive or negative changes in pressure in the fluid of the hollow tube, the detector processing device including a low pass filter that filters the detector output signal to remove a background non-electric signal therefrom, the detector processing device outputting a detector processing device output signal; and an output device for causing an audible alarm signal or a visible alarm signal to be output in response to the detector processing device output signal.
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31. An alarm system comprising:
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a wall-mounted signal carrying hollow tube having a first end and a second end, at least a part of which is manipulable at a manipulating point to generate a measurable non-electric acoustic signal that can be carried by the signal carrying hollow tube; an acoustic microphone that detects the measurable non-electric acoustic signal and that outputs a detector output signal representing the non-electric acoustic signal; a detector processing device that processes the detector output signal to detect a quiescent level of the detector output signal and to detect deviations from the quiescent level indicative of positive or negative changes in pressure in the hollow tube, the detector processing device including a low pass filter that filters the detector output signal to remove a background non-electric signal therefrom, the detector processing device outputting a detector processing device output signal; and an output device for causing an electric signal to be output in response to the detector processing device output signal.
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Specification