An infrared sight glass for aftermarket fitment around an opening of an enclosure which enables thermal inspection of electrical equipment within the enclosure. Gas exit ports on the barrel operate a piston which actuates a connecting rod assembly rearwardly. The discharge circuit discharges the well voltage line and the first voltage line of the memory device after the end of the erasing period and includes a first and second switch circuit and a first and second control voltage supplier. The sum may be compared to a threshold to make this determination. At least during an image forming process, a slip condition is substantially the same throughout all image transfer positions where the image carriers face the member. The hardfacing on the cutting element was formed with a hardfacing composition that includes a binder alloy and a carbide phase, which includes from about 80% to less than 100% by weight of a combination of sintered carbide pellets and crushed cast carbide, and from more than 0% to about 20% by weight of carburized tungsten carbide.