Motion -based fail safe braking for trolleys

A fail safe brake system for a trolley connected to a vehicle, comprising:

• a left deadman's brake fixed castor wheel;
• a right deadman's brake fixed castor wheel;
• a mechanical lever, further comprising a lever to multiply force, and a first brake cable between said lever and said left and right deadman's brake fixed castor wheels, and a second brake cable connected to a pulley system, and wherein said first and second brake cables that transmit force between said brake and said mechanical lever;
• said pulley system further comprises a small radius pulley and large radius pulley, wherein said pulley system reduces the displacement required by the hitch pin holder to release the brakes;
• a brake wire routing conduit;
• a brake wire tensioner that maintains the brake cable in constant tension to avoid slack;
• trolley base;
• brake wires that connect a hitch pin plate and said mechanical lever;
• and
• a hitch pin holder to couple said trolley to said vehicle, wherein the hitch pin plate holds the vehicle on one side with a pin while the opposite end holds a single brake cable from the brake wire tensioner of the trolley, whereby the trolley is provided a degree of lateral freedom as the trolley is tugged by said vehicle;
• a small plate held in tension by springs;
• wherein when a pull force is applied to a hitch pin plate, the brake cable displaces, pulling said small plate, and the pull force moves the brake cables that are connected to the mechanical lever via said pulley, and the mechanical lever multiplies the pull force and pulls the lever of the left and right Deadman's brake castor, thereby releasing the brake, and thereafter the wheel is free to rotate.