Vibration generators

Patent · Tue Sep 16 00:00:00 EDT 1980

OSTI ID:6686135

Lerwill, W E

Apparatus for generating vibrations in a medium, such as the ground, comprises a first member which contacts the medium, means , preferably electromagnetic, which includes two relatively movable members for generating vibrations in the apparatus and means operatively connecting the said two members to said first member such that the relatively amplitudes of the movements of said three members can be adjusted to match the impedances of the apparatus and the medium.

• Assignee: Seismograph Service Corp
• Patent Number(s): US 4222455
• OSTI ID: 6686135
• Resource Relation: Patent File Date: Filed date 16 Jan 1978
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
GROUND MOTION
PRODUCTION
SEISMIC SOURCES
DESIGN
SEISMIC WAVES
ELECTROMAGNETS
ELECTRICAL EQUIPMENT
EQUIPMENT
MAGNETS
MOTION
580203* - Geophysics- Geophysical Survey Methods- (1980-1989)