Electromagnetic vibrator for seismic and civil-engineering appli

Details Electromagnetic vibrator for seismic and civil-engineering appli Electromagnetic vibrator for seismic and civil-engineering appli

1987-05-11

1989-04-11

Kyle, Deborah L.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Vibrator-type transmitter

367190, 181113, 181121, H04R 2300

Patent

active

048212466

ABSTRACT:
An electromagnetic vibrator for seismic and civil-engineering applications is provided with a supporting structure fitted with a coupling element, and a reaction mass, which is to be caused to vibrate, with an electromagnetic drive associated therewith and provided at least with electromagnetic coils. The reaction mass is magnetically suspended on the supporting structure by means of one or more magnets with the associated electromagnetic coils and is at the same time caused to vibrate by the electromagnetic drive. The vibration force is exerted on the pole surface of the one or more magnets and the reaction mass is accelerated to at most the acceleration due to gravity.

REFERENCES:
patent: 3287696 (1966-11-01), Cholet et al.
patent: 3302744 (1967-02-01), Lemm
patent: 3313370 (1967-04-01), Cole
patent: 4222455 (1980-09-01), Lerwill
patent: 4371800 (1983-02-01), Brander
patent: 4529898 (1985-07-01), Voloshin et al.
patent: 4623202 (1986-11-01), Shingu
patent: 4631430 (1986-12-01), Aubrecht
patent: 4644205 (1987-02-01), Sudo et al.
patent: 4715470 (1987-12-01), Paulsson

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