Warmer plate cover

In an automatic brewing device having an electrically heated warmer plate with a glass vessel supporting surface for maintaining a beverage at a constant elevated temperature and a spacer positioned intermediate the warmer plate and glass vessel to prevent excessive heating of the beverage in the glass vessel, the improvement comprising:

• a warmer plate cover means of rigid, heat resistant plastic material having a softness sufficient for reducing substantially glass vessel breakage during use, said warmer plate cover forming a spacer between the warmer plate and glass vessel and including a body portion having first and second opposing surfaces, the first opposing surface corresponding to the glass vessel supporting surface of the warmer plate, and the second opposing surface including a substantially flat surface portion having a plurality of spaced, concentric grooves about a center portion for dividing the flat surface portion into a plurality of rings about the center portion, a plurality of spaced radial grooves extending from the groove defining the center portion for dividing each ring of the plurality of rings into a plurality of circle sector segments with said uniformly shaped circle sector segments of the ring adjacdnt to the Center portion having a preselected size defined by surrounding grooves, and each additional ring of circle sector segments having increasing numbers of radial grooves interconnecting adjacent ring forming grooves for dividing the rings of circle sector segments into increasing number of uniformly shaped circle segments, all of said grooves being in open communication with each other and coacting with a bottom of the glass vessel for forming hot air passages producing uniform heat distribution throughout the warmer cover plate for alleviating heat generated stresses within the glass vessel while maintaining the beverage temperature uniformly below the brewing temperature.