This invention is directed to a new automatic braking system for large airline baggage/mail carts and incorporates the use of a self-adjusting mechanism to provide positive ‘stop’ and non-rolling movement while the cart is intended to be in a static stationary condition for use by airline ground crew members and does not require any additional cart operator movement or action or directed effort to activate or deactivate the braking system. ;The new technical feature of the cart braking system is the design, fabrication and installation of the airline cart bottom frame undercarriage-mounted assembly which incorporates the use of a torqued spring device which allows automatic positioning of the braking cross member to make solid tire contact which provides full stopping and locking of cart movement regardless of tire wear or surface gradient. ;The brake assembly includes a threaded brake actuator, notched brake cross members, bolts within tubes, flanged angles, brake cross member guides, steel spring and spring guard assembled and installed on the undercarriage of the cart and automatically activated and deactivated by the upward and downward motion of the cart handle by the operators during normal operations of baggage and mail handling.
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