Abstract: A furnace producing a precisely controlled temperature gradient within a central bore by a plurality of heating elements sandwiched between respective insulating layers with each heating element loosely thermally coupled to a thermally conductive ring extending concentrically outward from the furnace bore. Thermal sensors at each layer provide data to data processing equipment which controls and moves temperature gradients within the furnace by program.

Abstract: Refractory lining elements for stoves and furnaces containing vertical and intersecting lateral passages for aspirating burning fuel.

Abstract: Apparatus of the invention bubbles air through a dielectric liquid including water to produce a vapor for catalytic enhancement of combustion. By maintaining low turbulence and tailoring the bubble rate to the demand of a connected combustion device, a substantial amount of negative ionization is produced contributing greatly to the catalytic action and the efficiency of a connected combustion device such as a heating furnace.

Abstract: A barbecue grill using a longitudinally extended cage of metal strips for retaining combustible material during combustion and connected to supports for carrying rotatable spits at a plurality of positions around the periphery of the cage.

Abstract: A weather door suitable for commercial garages and warehouses made from sheets of flexible plastic having a length at least twice the height of the doorway to be covered and in which the sheet of plastic is slit in such a way so that when it is folded in the middle, a series of strips of the plastic can be interleaved to present a weather barrier when hung across a door opening that will part around a vehicle or other object or a person entering or leaving the doorway.

Abstract: Microwave phase modulators are described utilizing three or more hybrid junctions, two of which are phase quadrature hybrids each having one pair of conjugate terminals terminated with switching means and each having one of the remaining terminals connected to a respective terminal of a third hybrid junction. With power in at a third terminal of the third hybrid junction, power out at the 4th terminal of the third hybrid junction can be selectively shifted 180.degree. or switched off by operation of the switching means. Broad band operation is achieved and reflections by the switching means do not have to have a precise phase tolerance as long as they are similar.

Abstract: An antimicrobial solution of a microbiologically active organo sulfonyl ethylene dissolved in an organo phosphorus compound selected from the group consisting of organophosphites and organophosphonates.

Abstract: A thermal window barrier of quilted insulating fabric supported taut by springs connected to track runners and retractable in pleats.

Abstract: A method of atomization control and related gas atomizing nozzles are described which enable variation of the degree of atomization, the liquid and gas flow rates and the atmospheric spray dilution. Varying the thickness of flowing liquid and adjacent atomizing gas sheets varies spray droplet size and atmospheric spray dilution. Transverse sheet size is varied to change nozzle capacity. Annular and linear sheet forming nozzles are described. Nozzles are also described with flexible divider walls whereby thickness of the flowing sheets may be varied by altering relative flow pressures.

Abstract: Microwave hybrid coupler combinations using magic tees in which the symmetrical arms are used for output ports in power combining and the nonsymmetrical arms are used for output ports in power dividing.

Abstract: Apparatus having a plurality of signal channels, a plurality of stopwatch circuits and a plurality of time lapse displays interconnected so that the relative time lapses in a series of related occurrences can be displayed.

Abstract: An oil burner in which a liquid fuel oil is vaporized in a heated vaporizing chamber connected through an apertured partition to a multiple concentric shelled combustion chamber.

Abstract: A stereo surgical microscope using a single large objective lens as the final lens of both optical paths and having changeable sets of galilean optics behind the objective lens for each optical path, the sets of galilean optics mounted on a rotary single shaft and arranged to provide magnification changes upon rotation of the shaft. A rotary solenoid connected to one end of the rotary shaft rotates the magnification changer for a different magnification upon each operation of a switch.

Abstract: Digitally-controlled tracking impedances and an automatic standing wave ratio measuring instrument employing digitally-controlled tracking impedances to cause a voltage representing the forward voltage in a radio frequency transmission system to track a fixed voltage and to output a voltage with which the standing wave ratio can be directly displayed independently of the power characteristics of the transmission system.

Abstract: An LED flasher circuit is attached to a battery-cell-powered lamp and connected to the battery power source to provide a finding aid for the battery lamp in the dark.

Abstract: A microwave hybrid T-Junction switch using the two main (symmetrical) arms as input/output ports and two branch arms (E and H-plane) as control terminals, one of the branch arms containing a biased diode for switching and the other branch arm terminated with a fixed electrical short.

Abstract: An ash remover having an ash rake which cooperates with a bracket on the cover of the ash remover to hold the cover closed when transporting ashes.

Abstract: Left ventricular end diastolic pressure is determined by data processing analysis of EKG waveform, first heart sound and carotid pulse waveform. Electrical, sonic and pressure transducers obtain patient data noninvasively and provide it to a data processing system.

Abstract: A combined stem assembly and removable handle for a rotary control device such as a valve. The handle interlocks with an indexing member and is secured by a hollow nut that screws onto the stem over and enveloping the nut holding the stem assembly together.