Patent ID: 8764469

Claim:
A power supply system comprising: a. a circuit panel arranged for connection to a power grid, the circuit panel including a start button and a power cord having a first end and a second end, wherein the first end is engaged with the power grid and a second end including a pinhole face with a plurality of pinholes; and b. a pin power plug with a plurality of pins for releasable engagement with the pinholes of the power cord, wherein the pin power plug is connectable to a device to be powered and wherein the pinhole face and the pin power plug are arranged to transfer power therebetween only when the pins of the pin power plug and the pinholes of the power cord are aligned and engaged with one another, wherein a first portion of the plurality of pinholes of the power cord and a corresponding first portion of the plurality of pins of the pin power plug are arranged to supply current from the power grid to the power cord when aligned and engaged with one another, wherein a second portion of the plurality of pinholes of the power cord and a corresponding second portion of the plurality of pins of the pin power plug are arranged to supply current from the power cord to the device when aligned and engaged with one another, wherein the circuit panel includes a safety circuit arranged to prevent current from the power grid to the power cord unless: 1) the first and second portions of the plurality of pinholes and the plurality of pins are aligned and engaged with one another; and 2) contacts of the safety circuit are moved from an open to an engaged position and the start button of the circuit panel has been pushed, and wherein the power cord includes a safety ejection subsystem configured to cause disconnection of the second end of the power cord from the pin power plug when the two are connected together under tension loading of the power cord.