Abstract: A weighing system for a vehicle having a spring supportive frame which moves relative to the axles of the vehicle in response to changes in load weight on the vehicle. The weighing system includes at least one position indicator for each axle to be monitored which provides electrical signals which vary in accordance with the built position of the frame relative to the axle which is being monitored. The weighing system also includes a programmed central processing unit for receiving the electrical signals from the position indicator and for calculating the load weight on the frame, based on the value of the electrical signals.

Abstract: In the service request communication system disclosed herein, a plurality of battery-powered table units communicate a variety of service requests to a central server or master unit by a bi-directional wireless radio frequency data link. The table units remain in a low-power "sleep" state until any one of a plurality of switches is actuated by a customer to denote a corresponding service request. A transceiver is controlled by a microprocessor to transmit a coded signal identifying the request and then to receive and indicate to the customer an acknowledgment signal transmitted from the server or master station. At a server station a display is operated to identify the table unit/request combination, the display being canceled when a corresponding switch at the server unit is actuated, e.g. by the employee who will provide the service requested.