Abstract: A check-out counter assembly includes a cabinet that has an open space with guide rails located adjacent opposite edges of the space to receive a conveyor module which is completely self-contained and includes a power source as well as all of the removable components of the conveyor system. In addition, the respective rollers which support a conveyor belt are also designed as modular units which can be removed from the frame without any special tools. The conveyor module is designed so that power is automatically interrupted when the module is removed from the cabinet and the cabinet also has a safety plate which automatically interrupts the electric motor when an obstruction enters the space between the surface of the moving conveyor belt and the adjacent fixed surface of the cabinet.

Abstract: A coordinated start/stop control system for controlling the operation of multiple conveyor checkout systems, wherein the operation of a pair of rear transport belts is selectively controlled in response to the operation of a first transport belt, dependent on the actuation of a magnetically operated electrical switch by a control magnet mounted on a diverter bar or arm.

Abstract: An improvement in an inflator valve, pressure gauge, and automatic pressure-responsive relief valve, all of which are combined into an integral hand-held and operated device for use in high pressure inflating applications.