Apparatus for timing the firing of energy sources

Details Apparatus for timing the firing of energy sources Apparatus for timing the firing of energy sources

1974-09-19

1976-10-12

Birmiel, H.A.

Acoustics

Geophysical or subsurface exploration

Programmed or timer-controlled

181111, 235 92PE, 235 92T, G01V 138

Patent

active

039851990

ABSTRACT:
Apparatus for effecting and controlling the firing of energy sources, particularly is seismic work, includes means for automatically correcting the delays between the desired and actual firing times which may be different for different sources. These means comprise a number of programmable counters for initiating the firing of different sources, a reference time counter to indicate the desired firing time or times and comparator means responsive to differences between actual and desired firing times to cause the programmable counters to bring the actual firing times towards the desired firing times.

REFERENCES:
patent: 3687218 (1972-09-01), Ritter
patent: 3704362 (1972-11-01), Kolby et al.
patent: 3809864 (1974-05-01), Sampey
patent: 3865305 (1975-02-01), Sampey

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