| 摘要 |
<p>1. Device for de-ratting by vibrations for ground or constructions, comprising a small electronic centre (1) arranged to generate a series of impulses at a frequency and at intervals determined in accordance with a predetermined programme and coupled by cables (2) to a series of terminals (3) operating by electro-magnet and each provided with a rod (7) intented to be driven into the ground or with a bracket made fast with a building structure, characterized in that : - the electronic centre (1) is arranged to generate only low frequencies, - each rod (7) or bracket of a terminal is fast only with a plane resilient element (16, 24) provided with a magnetic mass (13) and placed in vibration by an electromagnet (12, 22) disposed in the terminal, by electro-magnetic operation.</p> |
