Abstract: A method and apparatus for cleaning a membrane module, the membrane module having a plurality of porous membranes, the membranes being arranged in close proximity to one another and mounted to prevent excessive movement therebetween and means for providing, from within the module, by means other than gas passing through the pores of the membranes, gas bubbles entrained in a liquid flow such that, in use, the liquid and bubbles entrained therein move past the surfaces of the membranes to dislodge fouling materials therefrom, the gas bubbles being entrained in the liquid by flowing the liquid past a source of gas to draw the gas into the liquid flow. The gas bubbles are preferably entrained into the liquid using a venturi type device. The membranes are preferably partitioned into discrete groups to assist cleaning while maintaining high packing density.

Abstract: A localized radio frequency information system utilizing a conventional wireless communication device such as a cellular telephone, adapted with a plug-in dedicated receiver and processor which receives the radio frequency from a low power transmitter which, for example, might be located at an object of art in a gallery, identifies one of several codes to a central control which identifies the location of the device and routes to the wireless communication device a voice or text message relevant to the particular location identified such as a descriptive message relating to the object of art at the identified location..

Abstract: A method and apparatus for cleaning a membrane module, the membrane module having a plurality of porous membranes, the membranes being arranged in close proximity to one another and mounted to prevent excessive movement therebetween and means for providing, from within the module, by means other than gas passing through the pores of the membranes, gas bubbles entrained in a liquid flow such that, in use, the liquid and bubbles entrained therein move past the surfaces of the membranes to dislodge fouling materials therefrom, the gas bubbles being entrained in the liquid by flowing the liquid past a source of gas to draw the gas into the liquid flow. The gas bubbles are preferably entrained into the liquid using a venturi type device. The membranes are preferably partitioned into discrete groups to assist cleaning while maintaining high packing density.

Abstract: The method for testing an electronic control device containing a microcomputer and a volatile memory for programs processed in the microcomputer includes transferring a program module for testing to the microcomputer (14) via a serial interface (SSO) prior to the testing, the program module including commands for executing individual data reading and writing operations in the control device (12) in response to respective test commands; writing the program module into the volatile memory (Code RAM) in the control device (12) prior to the testing; receiving test instructions including several test commands in the microcomputer (14) from an external test device (10) via the serial interface (SSO); processing the program module by the microcomputer (14) to test the control device (12); triggering a number of the individual data reading and writing operations in the control device (12) via the several test commands received in the control device (12); transferring data generated in the control device (12) during t

Abstract: An ultrasonic leak detector which discriminates against leak signals originating from outside a desired detection zone. Incoming ultrasonic waves are divided into mutually exclusive low and high frequency signals, which signals are then processed to form an intensity ratio. The intensity ratio is compared to a pre-selected ratio corresponding to an ultrasonic source at the boundary of the detection. Ultrasonic leak signals originating from outside the desired detection zone are ignored. The presence of a leak within the detection zone is indicated by audio and/or visual devices.

Abstract: A combination portable ionization chamber and support for mounting and adjustably aligning the chamber to an X-ray cassette so that the ionization chamber is accurately positioned in line with a source of radiation and a body part or object being X-rayed wherein the support is suspended from the X-ray cassette and retains the ionization chamber in position abutting the rear surface of the X-ray cassette so that when sufficient radiation has been detected by the ionization chamber to insure an acceptable radiograph, power to the radiation source will be automatically terminated.