Apparatus and method for selectively activating plural electrical loads at predetermined relative times
First Claim
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1. A method for selectively activating a plurality of electrical loads at respectively corresponding predetermined relative times, said method comprising the steps of:
- generating reference timing signals at a central location;
separately receiving and processing said reference timing signals at the site of each electrical load;
said processing step at each site including the measurement of a respectively corresponding reference time interval defined by said reference timing signal and subsequently measuring a respectively corresponding predetermined time delay as a function of the earlier measured reference time interval; and
activating each electrical load after its respectively corresponding predetermined time delay has elapsed.
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Abstract
Separate electrical timing and load activation devices are provided for each of plural electrical loads and each device is connected to receive reference timing signals from a central unit. Each of the separate timing and load activation devices measures a reference time interval accurately defined by the reference timing signals and subsequently activates its associated electrical load after a respectively corresponding predetermined time delay which is determined as a function of the locally measured reference time interval.
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Citations
19 Claims
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1. A method for selectively activating a plurality of electrical loads at respectively corresponding predetermined relative times, said method comprising the steps of:
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generating reference timing signals at a central location; separately receiving and processing said reference timing signals at the site of each electrical load; said processing step at each site including the measurement of a respectively corresponding reference time interval defined by said reference timing signal and subsequently measuring a respectively corresponding predetermined time delay as a function of the earlier measured reference time interval; and activating each electrical load after its respectively corresponding predetermined time delay has elapsed. - View Dependent Claims (2, 3, 4, 5)
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6. A method of energizing an electrical load at a predetermined delay after a starting signal, said method comprising:
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feeding control signals at accurately timed intervals to a preset signal selecting system wherein two control signals characteristic of the desired delay are selected, generating first and second timing signals in response to each of said two selected control signals, feeding said first and second timing signals to timing means wherein the time interval between the said first and second timing signals is measured, generating a starting signal and, after a delay period from said starting signal.Iadd., which begins at a reference time defined by said control signals and .Iaddend..[.that.]. is determined by the time interval between said first and second timing signals as measured by the timing means, feeding energy to the load. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification