Snap-on darning and embroidery plate

A one-piece plastic feed dog cover plate for a sewing machine attachable to a needle plate having a needle aperture and feed dog openings therein, the cover plate and needle plate including mutually engageable parts by means of which the cover plate can be secured to the needle plate in a position overlying the feed dog openings, said cover plate being of a resilient plastic and including as an integral part thereof a single flexible arm, the mutually engageable parts of the needle plate and cover plate including a pin located on the underside of the arm to move with the arm and another pin in a fixed position on the underside of another portion of the cover, said mutually engageable parts also including openings in the needle plate to mate with said pins, and the pins on the cover plate being located to require the flexible arm to be laterially displaced from its unflexed position before the cover plate is secured to the needle plate.