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4014403 |
Vibratory apparatus for use in seismic exploration
In a variable frequency seismic vibrator including an earth coupling plate, means for generating a reaction impedance, and an energy source for generating reciprocating movement of the coupling...
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4011924 |
Device for producing mechanical waves
A device for generating sound waves for use in shallow terristrial seismology incorporates a percussion mass, a motor for driving the percussion mass to strike the ground for intermittent contact...
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4006795 |
Means for seismic prospecting from bulk liquid carriers
Apparatus for conducting seismic reflection surveys from oil tankers or other bulk liquid carriers in the course of their normal journeys. Seismic sources and detector apparatus are mounted in the...
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3999626 |
Apparatus and seismic method
A seismic generator for communicating from either above or below the surface of the earth is disclosed. The generator includes a system of eccentrically weighted masses such as, for example,...
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3983957 |
Method and apparatus for creating seismic waves in the earth
A mass positioned above the earth and having downward extensions, which may include wheels, resting on the earth. One or more closed chambers having two parts vertically reciprocable with respect...
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3979715 |
Method and system for achieving vibrator phase lock
An improved controller for vibratory seismic energy sources insures that the energy imparted to the ground by the source is in phase with the reference signal. Phase lock is achieved in a manner...
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3934673 |
Vibrator systems for generating elastic waves in the earth
This abstract describes vibrator systems for generating elastic waves in the earth, in which an actuator has a mechanical output drive means responsive to an electrical oscillatory signal, the...
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3906884 |
Acoustic minesweeping generator
A noisemaker is disclosed which includes an elongated metal pipe with scrhread-like fins that are connected to the outside surface thereof and that extend along substantially the length thereof....
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3884324 |
Mounting for seismic vibrator
A seismic exploration vehicle includes a main frame upon which a vibrator assembly and control cab are positioned and front and rear powered tractors connected to the main frame for desired pivotal...
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3866709 |
VIBRATORY SEISMIC ENERGY GENERATOR
A vibratory source of seismic energy comprises a base plate for contacting the earth driven by a hydraulically actuated piston connected to the base plate by a connecting rod. The piston cylinder...
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3642090 |
MARINE IMPLODER-TYPE ACOUSTIC IMPULSE GENERATOR
An acoustic impulse generator for producing in a liquid body acoustic impulses useful, for example, in geophysical explorations. The generator includes a housing which defines an enclosed chamber...
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3583521 |
CONTINUOUS SEISMIC SOURCE
A continuous seismic source includes a drum towable by an axle along the ground and having radially disposed baffles arranged irregularly within its circumference, together with a plurality of...
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3542151 |
AIRBORNE SEISMIC INPUT WEIGHT DROP DEVICE AND METHOD
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3416632 |
Beat frequency sonic technique and apparatus for use in seismic surveys
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3367443 |
Method and apparatus for improving seismic impact signals
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3353772 |
Positioning and isolation apparatus for a horizontal vibrator
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3302744 |
Electro-magnetic acceleration method of increasing impact of dropped body and apparatus therefor
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3298456 |
Electromechanical vibrators
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3296589 |
Seismic transmission-reception system
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3287696 |
Vibrator
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3283844 |
Seismic prospecting system
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3282372 |
Direct drive method and apparatus for generating seismic vibratory signals
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3277977 |
Seismic surveying with multiple falling weights
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3270832 |
Apparatus for generating seismic impulses used in geological exploration
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3244252 |
Seismic source
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3229784 |
Programming system for a continuous wave generator
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3209854 |
Impact apparatus for generating a sonic impulse employed in seismic geological exploration
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3193046 |
Release mechanism for impact seismic impulse generating apparatus
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3185250 |
Seismic pulse generator
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3172483 |
Self-propelled multi-purpose percussion unit
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3137835 |
Underwater sound generator
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3130809 |
Method and apparatus for generation of seismic waves
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3004389 |
Device for varying the frequency of a vibration exciter
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2993553 |
Well logging system
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2910134 |
Method of coupling a vibrator to an elastic medium
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2851121 |
Method and apparatus for seismic exploration
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