Abstract: A device for testing the profile of an ultrasonic beam comprising a block of solid material permitting propagation of said beam therethrough without substantial scattering. A plurality of discrete particles having surfaces interfacing with said solid material are located in and are generally uniformly distributed throughout a substantially planar region in said block. The test device is scanned with an ultrasonic beam and an image of the beam profile is generated by reflection of the beam by the particles.

Abstract: A test body is provided for determining an operating characteristic of a tomographic apparatus of the type that scans a human body member with an X-ray beam along an edge of a slice through the member, accumulates data in electrical form which is representative of the variations in the intensity of X-ray transmission through the body during a plurality of scans and reconstructs a cross sectional image of the slice from the accumulated data. The body comprises an energy absorption means which is arranged in a predetermined configuration and is adapted for absorbing electromagnetic energy from an impinging X-ray beam. The body also includes support means for positioning the energy absorbing means between a scanning X-ray beam and a detector of the apparatus.

Abstract: An electrode pouch for use in a reserve battery has a flexible containment wall with first and second side wall portions defining between them a fluid impervious, electrolyte chamber. Preferably each of the side wall portions has a carrier layer of a sealable plastic material and a bonded overlying fluid barrier layer formed of a metal electrode material. The electrode pouch construction enables rapid and inexpensive manufacture at high production rates by conventional plastic film and sheet packaging equipment. The pouch is used in combination with other pouches or by itself in various battery constructions. Such batteries include means for piercing the pouch through the metal and plastic layers to release the electrolyte and activate the battery.