Abstract: An improved tympanometric testing means is described for automatically testing the status of the middle ear. The testing unit provides a recording on a chart showing a change in the compliance of the middle ear during change of the air pressure in the external ear. The tympanometric test unit operates automatically as the clinician inserts the test probe into the patient's ear. The unit automatically determines that the probe is in an unblocked condition and that the test probe tone is at a proper intensity relative to the ear canal volume. When these conditions are met and the ear canal pressure at the probe reaches the predetermined test start pressure, the unit proceeds with the testing as the pressure in the ear canal moves between desired limits such as between the +200 and -200 mm H.sub.2 O and while the recorder makes a plot of the ear drum compliance.
Abstract: An improved sealing machine cap pickup is disclosed. The cap pickup is mounted on a sealing machine to feed closure caps onto filled containers being carried through the machine and to lightly turn the caps onto the containers. The pickup includes an improved universally mounted cap guide which directs the caps to a cap applying means such as spaced resiliently mounted and relatively deep cap applying belts or cap rotating friction shoes. Pressure backup plates are positioned above the cap rotating means for urging the caps downwardly at the correct rate as they are turned onto the moving containers.
Abstract: An improved cushion pad is disclosed for use in packaging glassware or other fragile articles in a compartmented carton. Such cartons, including the well known corrugated fiberboard cartons, are used with vertical dividers for packaging articles having extending extremities such as glass stemware, whose projecting feet and flaring tops may project into adjacent compartments and engage and chip or crack one another. The cushions of this invention have preformed grooves to receive the tops and bottoms of the dividers causing the extremities of the articles to be positioned away from the spaces between dividers thereby preventing them from striking one another during carton handling.
Abstract: An improved bellows valve is disclosed having a relatively long bellows attached at one end to the valve control stem and at its other end to a recessed bellows mounting in the valve bonnet. The recessed attachment permits the use of a relatively long bellows with a valve bonnet of minimal size and mass and permits a wide valve opening with a relatively small valve port. Such a small valve port requires a low closing force for the stem and the use of a wide opening resists clogging. An anti-torque member connected between the valve bonnet and the valve stem prevents stem rotation to isolate the bellows from undesirble rotation during the axial stem and bellows movement.
Abstract: The process accumulates heat from a relatively low temperature source to support an endothermic chemical reaction, partially separates the products of the reaction from the reactants, and then releases the accumulated heat in the reverse exothermic chemical reaction at a higher temperature simultaneously restoring the original chemical composition. The forward and reverse chemical reactions are slow enough to prevent substantial reaction during the separation and transfer of the chemicals, but they may be speeded by catalysts within the reaction chambers. The chemicals are separated by standard procedures such as sorption-desorption, distillation, freezing and melting, precipitation, extraction, centrifugation, and reactions with other materials.
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