Abstract: An ultrasonic imaging system including a power on self test (POST) and an extended self test (EST). The POST includes (a) a verification test, (b) a register test (c) a controller test, (d) a receive digital signal path test and (e) a basic front end test. The POST is initiated, performed and completed within a short time, such as three seconds, from power ON. The EST is performed after the POST at the discretion of an operator, and includes a transmit test, a transducer element test, a front end voltage test and a receive test.

Abstract: A method and device for controlling the transmission across a data link is disclosed. Link Layer protocol formatting in a variation on a "sliding window" protocol is implemented.

Abstract: A woven textile fabric and seam is disclosed for joining dryer fabrics and the like papermaking clothing constructed of multiply woven fabric belting wherein each of the ends of the belting is separated into continuous woven superposed plys permitting insertion and securing of seam webbing between the plys at each end of the belting. The seam webbing is illustrated sandwiched between the separated plys and completely enclosed therein when the plys and webbing are secured together so that interruption of the otherwise continuous belting is minimized. Having affixed the webbing at ends of the woven fabric in this manner, pintle loops may be interlaced and fastened securely together by the insertion of pintle material. One of the separated plys may be advantageously woven to provide pintle loops when folded upon itself.

Abstract: A brick-cutting machine having an axially rotating reel with sets of radially disposed, spring-tensioned cutting wires is equipped with resiliently compressible, rubber cushion blocks or pads positioned to cushion and limit rebounding movement of the wire-tensioning springs and thereby prevent the application of excessive and destructive tension forces to the cutting wires of the reel.

Abstract: A pressure stabilizer for use in hydrocarbon storage facilities which acts as an orifice and also permits the pressure in the system to be stabilized when it reaches a given amount. The stabilizer has a casing with a valve seat and a heavy ball located above the valve seat so that the ball is forcibly displaced upwards when the pressure in the hydrocarbon storage facility reaches an amount sufficient to lift the weight of the ball. Support members extending from the side of the valve seat suspend the ball away from the valve seat a sufficient distance to form the appropriate sized orifice and to minimize contact of the ball to the casing so that the possibility of the stabilizer being frozen closed is minimized.