Abstract: A processing device is configured to process an initial set of command types. A command extension module and a digital signature are received. The digital signature is generated based on the command extension module using a private key of a key pair. The command extension module, once installed by the processing device, enables the processing device to process a new command type that is not included in the initial set of command types. The digital signature is verified using a public key of the key pair. Based on a successful verification of the digital signature, the command extension module is temporarily installed by loading the command extension module in a volatile memory device.

Abstract: A method and apparatus to enable real time recording and analysis of defects in manufactured products and expedite real time identification and correction of errors in production and assembly operations is provided. It is intended for use where a multitude of different parts are used to make multiple units of a device typically formed by stuffing components into a printed circuit board, therebeing one or more printed circuit boards in the finished assembly typically having a chassis and wiring harness. Support for fully integrated multiple inspection stations is disclosed. The inspection stations include terminals utilizing light pens and screens to input codes classifying defects, and also includes facilities and functions to capture defect data from automatic testing equipment. Real time output of defect indications and trends including classification thereof is provided both at the station, and through reporting stations distant from the manufacturing floor.

Abstract: Apparatus for measuring friction characteristics of a vehicle-travelled surface comprising a wheeled vehicle having a test wheel assembly pivotally suspended therefrom by a parallelogram suspension arrangement. The test wheel assembly includes a test wheel carried by a drive shaft which is driven at predetermined slip by a differential coupled to the vehicle wheels. A gear chain extends from the differential to the drive shaft through a housing which forms one arm of the suspension. The second arm is formed by a rod which extends from the differential to one section of a two-axis strain gage wheel force transducer at the test wheel assembly. The differential is suspended by parallel struts from the vehicle frame. A positive displacement pump is coupled to the differential for placing a film of water beneath the test wheel having a thickness which is independent of vehicle speed. The pump and test wheel are clutch driven.