Smoke generating machines for use in beekeeping, namely, bee smokers; Grill accessories, namely, charcoal grill conversion units for converting charcoal grills to electric smokers; Barbecue smoker cooking grates; Devices for generating smoke for signaling; Smoke generating machines for creating special theatrical effects; Barbecue smoker accessories, namely, convection plates; Barbecue smokers; Spark igniters for gas appliances