Abstract: An electrostatic spray gun having an installed high-voltage generator, connected at its low-voltage side with an installed switch element for turning-on and turning-off the high-voltage generator. The spray gun further is provided with a flow channel for an atomizing gas, the flow channel being connected with a pressure line. A manually-operated closure valve is arranged in the flow channel. The switch element is structured as a flow-actuated or flow switch and is arranged in the flow channel and its movable contact is coupled with a closure element of a differential pressure valve arranged in the flow channel. In this way it is possible to only then turn-on the high-voltage generator when the atomizing gas flows in an undisturbed fashion through the flow channel. Disturbances in the flow of the atomizing gas, whether such be due to clogging of the nozzle at the spray gun, or due to a malfunction of the pressure source of the atomizing gas, thus automatically turn-off the high-voltage generator.

Abstract: Electrostatic spraying apparatus comprising a housing having an opening, liquid atomization means and induction charging electrode means mounted in said housing to deliver an electrically charged spray of liquid particles outwardly through the opening, inlet means to said housing for delivering to the housing a flow of gas for subsequent envelopment of the electrically charged spray of liquid particles upon exit from the housing, and repelling electrode means of a polarity the same as the electrically charged spray and defining an electrical repulsion zone for repelling said spray immediately prior to and after the exiting of said spray from the opening. Relatedly disclosed are an electrostatic induction charging gas shroud adapter and a repelling electrode adapter, each to be employed with appropriate atomization means to deliver an electrically charged spray of liquid particles as described above.

Abstract: An electrostatic spray coating apparatus including means for mechanically atomizing coating materials and means for electrostatically charging the atomized material for deposit onto articles, is characterized by an improved material-charging means and an improved means for sealing material passages from the remainder of the apparatus in a manner which contributes to efficient and effective charging of the material, yet minimizes the capacitance of the material charging means, whereby the energy capable of being stored by the charging means is significantly reduced. The spray coating apparatus also includes means ensuring safety of the apparatus, and enhanced overall construction of the apparatus for greater service life, more reliable and safe operation, and economy.

Abstract: An induction-charging adapter head may be quickly and easily mounted on, or demounted from, a conventional spray device equipped with a plate-like adapter of the type disclosed. The plate-like adapter also provides for safe connection or disconnection of a high voltage source to the induction-charging adapter head electrode by providing means for maintaining an electrical path to ground between the adapter head and plate-like adapter during the making or breaking of the high voltage connection.