Communications: electrical – Selective – Having electron beam device
Patent
1973-07-09
1976-07-27
Birmiel, Howard A.
Communications: electrical
Selective
Having electron beam device
340 155TG, G01V 122
Patent
active
039720195
ABSTRACT:
Accurate timing at distant points is obtained by timing units which will operate independently at these points without the transmission of time signals between the units. Each unit includes means for producing time pulses at time intervals which are the same in the different units and means are provided for synchronizing the units when one is brought to and connected directly with the other.
REFERENCES:
patent: 3288242 (1966-11-01), Loeb
patent: 3416631 (1968-12-01), Patterson
patent: 3733584 (1973-05-01), Pelton et al.
patent: 3739870 (1973-06-01), Pelton et al.
Birmiel Howard A.
Seismograph Service Corporation
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