Registers – Platform operated – Platform actuated traffic counters
Patent
1978-09-22
1981-05-26
Thesz, Joseph M.
Registers
Platform operated
Platform actuated traffic counters
235 92CA, 235 92TF, 235 92EV, 364550, G07C 110, G06M 314
Patent
active
042700418
ABSTRACT:
The invention relates to a process and apparatus for detecting the presence of a physical phenomenon. The apparatus comprises a sensor which is sensitive to a characteristic quantity of the phenomenon to be studied and supplies a signal which is representative of the phenomenon. An amplifier is connected to the output of the sensor and an indicator for indicating passing beyond the threshold is connected to the amplifier. A differentiating circuit differentiates the amplified signal, while a comparator compares the differentiated signal as soon as a reference potential is exceeded. A time sampling circuit fixes prealert periods as soon as the reference potential is exceeded. The invention is applicable to the detection of pollution by combustible gaseous vapors, oil slicks, firedamp, thunderstorms, defects in surface states, etc.
REFERENCES:
patent: 3769844 (1973-11-01), Skoures
patent: 3955070 (1976-05-01), Suzuki et al.
patent: 4031365 (1977-06-01), Raggiotti et al.
patent: 4124840 (1978-11-01), Kobayashi
patent: 4165458 (1979-08-01), Kolzumi et al.
Commissariat a l''Energie Atomique
Thesz Joseph M.
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