Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1988-10-18
1990-03-20
Chapman, John
Communications: electrical
Condition responsive indicating system
Specific condition
200 6151, 200 6162, 68 232, 210144, H01N 3514
Patent
active
049105027
ABSTRACT:
A device for detecting the unbalance of a rotating machine from a predetermined threshold. This device includes a pendulum formed from a vertical rod made of an elastically deformable metal, the upper end of which is embedded in an insulating support fixed rigidly to the housing of the rotating machine and which at its lower end carries a metallic mass, the mass being received concentrically, with a predetermined peripheral play, within a metal rink likewise fixed to the housing and insulated electrically from the housing, the ring and the embedded end of the pendulum being connected electrically to an electrical alarm or safety circuit which closes as soon as the mass comes in contact with the ring, where the resonance frequency of the pendulum is below that of the parts of the rotating machine which is subjected to the unbalanced condition.
REFERENCES:
patent: 2081604 (1937-05-01), Schaum
patent: 2807950 (1957-10-01), Gerhardt et al.
patent: 3209561 (1965-10-01), Burdett
patent: 3227835 (1966-01-01), Conrath
patent: 3790727 (1974-02-01), Laserson et al.
patent: 4455461 (1984-06-01), Maguire
Dreno Alain
Fondin Jean-Louis
Serveau Michel
Chapman John
Simons Michele
SocieteJouan
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