Tappan created these pyrogrates for their Tappan Deluxe stoves. They claimed that they supported small utensils without tipping and evenly distributed heat. I believe them. These grates typically sat on the back two burners, but can be arranged in any way to be convenient.
The burner grates also came in a version with a glass insert called Pyroglas that were produced by the makers of Pyrex ware. More on these in another post. If any readers have photos of their Pyrolgas to share, we'd love to see them.
A big thanks to Ron & Aiden for sharing photos of their pyrogrates.