Vibrator for seismic geophysical prospecting

Patent · Tue Apr 21 04:00:00 EDT 1987

OSTI ID:6825945

Bird, J M

An improved vibrator system is described for seismic geophysical prospecting, comprising: a vibrator comprising a first part, or dynamic vibrator part (VD) attached to a base plate in contact with the earth and a second part or vibrator stationary part (VS). Sound attenuating ear protection apparatus is described comprising: a pair of air evacuated, sealed chamber members disposably covering the ears of a user to lie between the user eardrums and an ear external source of undesirable sound energy; the air evacuated sealed chamber members each including first and second smooth surface portions with each surface portion having a spherical segment terminated by an annular flange lip shape and being disposable over one external ear of the user with one spherical segment, adjacent the ear being of different, higher mechanical resonance frequency with respect to the other spherical segment distal of the ear; the surface segment distal of the ear; the annular flange lips of the first and second surface portions being joined together in a junction disposed intermediate of the first and second spherical surface portions and perpendicular of the flange lips; resilient suspension means engaged with the head of the user and with the sealed chamber members for supporting the sealed chamber members in selected position over the user external ears.

• Assignee: Industrial Vehicles International, Inc., Tulsa, OK
• Patent Number(s): US 4658930
• OSTI ID: 6825945
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
58 GEOSCIENCES
580203 -- Geophysics-- Geophysical Survey Methods-- (1980-1989)
CONTROL EQUIPMENT
DESIGN
EQUIPMENT
EXPLORATION
FLOW REGULATORS
FLUID FLOW
FLUIDS
GEOLOGIC DEPOSITS
GEOPHYSICAL SURVEYS
MECHANICAL VIBRATIONS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
OPERATION
PETROLEUM DEPOSITS
PRESSURIZING
PUMPS
RESOURCES
SEALS
SEISMIC SOURCES
SEISMIC SURVEYS
SPACE DEPENDENCE
SURVEYS
TIME DEPENDENCE
VALVES
WORKING FLUIDS