Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1979-05-21
1981-07-28
Zazworsky, John
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307234, 307246, 307362, 307514, 307597, 328185, 328116, H03K 5153
Patent
active
042812623
ABSTRACT:
A pulse generator, such as in a printing process, outputs pulses which are fed to a first threshold value circuit which generates respective rectangular pulses whose duration depends upon the time the respective pulse exceeds a first threshold value. An initially charged capacitor is discharged at a first rate in response to the leading edge of the rectangular pulse and at a second rate, twice the first rate, in response to the trailing edge of a rectangular pulse. The capacitor is connected to a second threshold value circuit which outputs pulse signals when the potential of the capacitor falls below a second threshold value.
REFERENCES:
patent: 3786360 (1974-01-01), Kawa
patent: 4019186 (1977-04-01), Dressen et al.
Siemens Aktiengesellschaft
Zazworsky John
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