Boots – shoes – and leggings
Patent
1985-10-23
1986-10-07
Wise, Edward J.
Boots, shoes, and leggings
364492, 361 31, 361 96, 361 24, H02H 504, H02H 7085, G06F 1556
Patent
active
046163247
ABSTRACT:
A digital overcurrent tripping arrangement having a nonpermanent digital memory. The arrangement further contains a resistor-capacitor stage that simulates the cooling-down process of a body. In accordance with the invention, a microprocessor uses a thermal excitation state digital value stored in the nonpermanent memory to calculate a digital normalized voltage value which is then stored in the nonpermanent digital memory. A digital comparator means within the microprocessor compares the digital normalized voltage value in the nonpermanent memory with a digital output of an analog-to-digital converter, the digital output corresponding to a voltage across the resistor-capacitor stage. If they agree, a charging switch between a current supply and the resistor-capacitor stage is opened. Upon reconnection of the main current supply after disconnection, the microprocessor stores the digital output of the analog-to-digital converter in the nonpermanent memory, the digital output corresponding to a residual voltage across the resistor-capacitor stage.
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patent: 4446498 (1984-05-01), Stich
Siemens Aktiengesellschaft
Wise Edward J.
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