Patent ID: 8413867

Claim:
A nailer or stapler device comprising: a solenoid; a fastener striker in operational communication with the solenoid; a capacitor in operational communication with the solenoid; and, a control circuit in operational communication with the capacitor, wherein the control circuit includes a firing safety circuit, the firing safety circuit having a hard logic override that prevents the stapler from discharging a staple when either the trigger switch, the safety switch, or combinations thereof is opened after a capacitor firing sequence operation has been initiated, wherein the capacitor firing sequence operation is initiated after both a trigger switch and a safety switch are closed, wherein the control circuit includes a SCR gate drive circuit, the gate drive circuit including a high speed bypass capacitor in operable communication with a transistor that redirects a charge provided by radiofrequency or electromagnetic transmissions that would otherwise accumulate to close the transistor, the transistor configured to facilitate operation of a capacitor discharge gate arranged in operable communication with the transistor.