Abstract: A tattoo machine having a control unit and a breaker-less handheld non-magnetic tattoo device. The control unit includes a motor mount, a motor, an eccentric cam, a conductive plate, a return spring, an insulated cam follower, an electromagnetic coil controller, a motor revolutions per minute and frequency, an inverter, and a modified voltage output. The breaker-less handheld non-magnetic tattoo device is electrically connected to the modified voltage output. The breaker-less handheld non-magnetic tattoo device includes a disposable needle cartridge, a hand held actuator, an electromagnetic coil, and a power plug. The tattoo machine provides multiple deposits of ink sequentially via the disposable needle cartridge at variable speeds and variable frequencies which provide fine detailed controlled ink application at variable depths, and at variable concentrations on skin including stippling effect while simultaneously reducing hand injuries for tattoo machine operators.

Abstract: A rotary speed limiting device for an electric motor has a current detecting device for detecting a motor current of the electric motor, a nominal value setting for adjusting a torque, a control and/or regulating device which limits the motor current to a maximum value depending on the nominal value setting, a rotary speed detecting device for detecting a rotary speed of the electric motor, the control and/or regulating device determining a maximum value of the motor current depending on the rotary speed determined by the rotary speed detecting device.

Abstract: A DC motor includes a power source, a stator and a rotor. Permanent magnets are mounted to either the stator or the rotor. Electromagnets are mounted to the other of either the stator or the rotor. Each electromagnet includes two coils which are each branched with a capacitor. A switching means, responding to the rotor, switches between a first mode in which the power supply is connected across a branch for energizing the coil and charging the capacitor and a second mode in which the branch terminals are closed for discharging the capacitor into the coil. The switching means and branches are arranged such that the coils of a particular electromagnet maintain the same polarity while also alternating between opposite polarities.