представляется аналогия с некой горелкой (как в духовке) - первоначальное возгорание (в одной из горелок) и последующее воспламенение (горелок) по всему контуру

In a heating apparatus of the type including a multiplicity of spaced, independent burners arranged in a single plane between a pair of manifolds which conduct air and gas to the burners, there is disclosed an improved ignition carry-over wherein the burners are arranged in a non-parallel, zig-zag pattern with the first end of each burner spaced relatively closely to the first end of the adjacent burner on one side thereof and spaced relatively far from the first end of the adjacent burner on the other side thereof whereby the flame readily jumps from one burner to the next.

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