US Patent: 3,728,626
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| Electronic Measuring System
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Patentees:
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| Alec T. Douglas (exact or similar names) - St. Johnsbury, Caledonia County, VT |
| Haydon C. Thomas (exact or similar names) - St. Johnsbury, Caledonia County, VT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 25, 1971 |
| Granted: |
Apr. 17, 1973 |
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Joel Havens
"Vintage Machinery" entry for Fairbanks, Morse & Co.
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Description: |
| In 1964 Fairbanks, Morse Inc. changed its name to Colt Industries.
Abstract:
The electronic measuring system includes a transducer to develop an analog signal which is a function of a value to be measured, a reference signal generating unit, a first comparison unit to provide a start signal when a reference signal from the reference generating unit reaches a coincidence point with the system ground potential and a second comparison unit to provide a stop signal when the reference and analog signals reach a coincidence point. All of these units are powered from a single power source and referenced to ground potential. A counter system receives and registers pulses in the interval between the start and stop signals and includes a first counter which is preset below zero and a net counter which is activated to count pulses after the first counter reaches zero. A ramp reset circuit is provided to actively drive the reference signal from the reference generating unit to a quiescent state when the stop signal is provided. |
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