公开(公告)号：US3739228A

公开(公告)日：1973-06-12

申请号：US3739228D

申请日：1972-02-18

Applicant: AIR IND

Inventor： POINT M

IPC: B05B5/053 ,  B05B5/08 ,  B05B5/00

CPC classification number: B05B5/0533 ,  B05B5/087

Abstract: A device for preventing risks of fire or explosion due to electric sparks which may be produced at the attachment or suspension contacts of metal objects on which an electrostatic coating is intended to be applied, said device comprising means for inducing an electric charge on said metal object, and also means for giving an information when said electric charge reaches a pre-determined dangerous value. The charge-inducing means may utilize the existing high-tension source employed for the electrostatic coating, acting from a distance, and may comprise a variable-threshold charge-detection device adapted to trip a safety, alarm or indicator means. The device can be used in automatic electrostatic painting and powder-applying installations.