Mechanical component attachment safety system

A mechanical safety system to prevent closing of a cover panel for a mechanical component unless the mechanical component is properly located on a frame comprising:

• a) a blocking rod movable between a first position wherein the blocking rod permits the closing of the cover panel and a second position wherein it prevents closing of the cover panel;
• b) over-center lever means having a plurality of pivot attachment means located in a plane and a joint, the lever means movable between a first position wherein the joint is located on one side of the plane and a second position wherein the joint is located on an opposite side of the plane;
• c) motion transmitting means operatively connecting the blocking rod to the over-center lever means such that when the over center lever means is in its first position the blocking rod is in its first position and when the over-center lever means is in its second position the blocking rod is in its second position;
• d) biasing means operatively associated with the over-center lever means to bias the over-center lever means toward its second position;
• and,
• e) means to connect the over-center lever means to the mechanical component such that the over-center lever means is retained in its first position when connected to the mechanical component.