Abstract: A household hamburger maker is disclosed having a hollow, circular outer collar and a hand-held center plug. Ground meat is placed into the hollow area of the outer collar, and the center plug is inserted into the same hollow area and pressed down against the ground meat. While the center plug is being pressed down, it is also twisted alternately clockwise and counterclockwise, which produces a smooth top surface on the ground meat as it is shaped into a hamburger patty. While still being twisted, the center plug is pulled back up and away from the hamburger patty, leaving behind a correctly-shaped patty that has a smooth top surface.

Abstract: A lock mechanism for a removable automobile roof panel comprising a cylinder type lock having a lock lever arm rotatable into a position to engage the roof panel latch pin actuating mechanism to prevent movement of a manual latch lever from the latch pin extended position to the pin retracted position. An alternate embodiment provides a cylinder type lock assembly which is supported between bracket members mounted adjacent a latch pin crank link. The presence of the lock assembly prevents rotation of the crank to retract the latch pins.