Boots – shoes – and leggings
Patent
1976-12-17
1979-05-22
Gruber, Felix D.
Boots, shoes, and leggings
307354, 340691, 361 90, 364550, G01R 1930
Patent
active
041562801
ABSTRACT:
A utility monitor for detecting and storing power line disturbances is provided which includes peak-voltage sensing means for over-voltages which provides an interrupt signal at the time of a strobe pulse indicative of a voltage rise above a preset threshold and which removes the interrupt signal when said peak voltage drops a preselected amount below the preset threshold value. A peak-voltage sensing means for under-voltages is also included for obtaining an interrupt output at the time of said strobe pulse indicative of a voltage drop below a preset threshold and for removing the interrupt output when said peak-voltage rises a preset amount above the preselected threshold value. A preselected number of cycles of said input sinewave voltage are stored before and after said interrupt.
REFERENCES:
patent: 3813667 (1974-05-01), Smith
patent: 3836790 (1974-09-01), Becker
patent: 3973197 (1976-08-01), Meyer
patent: 4006413 (1977-02-01), Silberberg
patent: 4069452 (1978-01-01), Conway et al.
Chambers et al., Digital Peak Detecting and Ripple Testing Device, IBM Tech Disclosere Bull. vol. 17, No. 7, Dec. 1974.
Gruber Felix D.
International Business Machines - Corporation
Sweeney, Jr. Harold H.
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