Abstract: An ice spud is provided with a blade having cutting means which comprises a pair of spikes and a cutting edge defining a notch in an end of the blade, the cutting edge intersecting lateral edges of the blade to define the spikes therewith, whereby the spikes are spaced from one another without obstruction therebetween and each of the spikes terminates in a cutting point at the respective lateral edge.

Abstract: Disclosed is an oxygen analyzer probe for use in situ in the flue gas stream of a furnace of the type having a housing, a solid electrolytic oxygen sensor adjacent to one end of the housing and first and second noble metal leads connected to the sensor. The present invention includes a terminal block within the housing to which the noble metal leads are releasably connected. At the terminal block intermediate leads of a metal dissimilar to the noble metal lead are connected thereto. Since all connections between dissimilar metals are made at the terminal block and since all such connections are at approximately the same temperature, no unbalanced thermocouples are introduced into the electrical path from the sensor. In one embodiment, the intermediate leads are comprised of a nickel alloy and have sufficient rigidity to form the prongs of a male plug connector which prongs extend from the rear end of the housing.