Abstract: A cover system for a percussion striking device allows drummers and percussionists to removably cover their existing sticks, mallets, and beaters of their preference with a light weight, durable fabric to produce benefits including: reducing volume during practice sessions, resulting in less ear fatigue, maintaining as true of a response as possible (“feel”) of the playing surface while working techniques used to enhance actual performance, and/or reducing wear on drumsticks, mallets, and beaters and all playing surfaces it is used on, as well as other benefits.

Abstract: A cover system for a percussion striking device allows drummers and percussionists to removably cover their existing sticks, mallets, and beaters of their preference with a light weight, durable fabric to produce benefits including: reducing volume during practice sessions, resulting in less ear fatigue, maintaining as true of a response as possible (“feel”) of the playing surface while working techniques used to enhance actual performance, and/or reducing wear on drumsticks, mallets, and beaters and all playing surfaces it is used on, as well as other benefits.

Abstract: A cover system for a percussion striking device allows drummers and percussionists to removably cover their existing sticks, mallets, and beaters of their preference with a light weight, durable fabric to produce benefits including: reducing volume during practice sessions, resulting in less ear fatigue, maintaining as true of a response as possible (“feel”) of the playing surface while working techniques used to enhance actual performance, and/or reducing wear on drumsticks, mallets, and beaters and all playing surfaces it is used on, as well as other benefits.

Abstract: A charged particle source includes a vessel defining an interior for containing a plasma, the vessel having an inlet communicating with the interior of the vessel and connected to a source of atoms, and an aperture through which a charged particle beam is discharged, an energy generator for communicating with the atoms in the interior of the vessel and effecting ionization of the atoms in the vessel and creating the plasma, an electrode assembly disposed in the interior of the vessel, the electrode assembly including a conductive electrode support member, a tray member associated with the support member, a conductive liquid disposed in the tray member, the liquid having a surface area and a conductor connected between the conductive liquid and a voltage source, and an ion optics assembly disposed adjacent the vessel for accelerating plasma-generated charged particles having the same polarity as the conductive liquid in the vessel while maintaining charged particles of the opposite polarity within the vessel.

Abstract: A charged particle source applicable for etching, thin film deposition, or surface modification includes a conductive electrode for controlling the plasma potential and beam voltage, the electrode retaining long term conductivity during operation, such as by shielding or in situ cleaning during operation, and/or by being operated in pulse mode conditions capable of preventing charge accumulation in the source during ion extraction.