Abstract: High resolution video signals of bandwidth up to 25 mHz are recorded magnetically or optically, or are transmitted on a communications channel carrier with superior fidelity by using novel electronic circuit system including implementations of an FM modulator, writing amplifier, and wideband discriminator which enable coding and decoding with high accuracy, low noise, and low interference. The video signals are used to directly modulate a square wave carrier using an FM technique employing a very low center frequency-to-bandwidth ratio without need for subsequent frequency translations. A writing amplifier provides gain needed for saturated recording with unique provisions to balance transition amplitudes for minimum second harmonic distortion without affecting the primary phasing of transitions. A novel multiwinding inductor and pulse discriminator implementation is capable of demodulating the very wide deviation FM signal with good cancellation of the second harmonic and fundamental FM carrier spectrums.

Abstract: An oxygen detection system including two equal and symmetrically constructed major DC magnetic circuits each having an air gap which is alternatively filled with a sample and a reference gas. A magnetic bridge arm connects the major magnetic circuits in series opposition to derive a null response when the flux carried in the magnetic circuits is equal and a component of varying flux when the sample and reference gases are interchanged to cause an unequal flux to be developed in the circuits caused by a change in the reluctance across the gaps. An encircling inductance coil senses the flux in the null bridge arm which is electronically sampled in sychronism with the sample and reference gas interchange to develop a difference signal directly derived and proportional to the difference in magnetic susceptibility of the sample and reference gases. An active magnetic shield cancels stray fields from affecting the sensor.

Abstract: Information is stored, using a relatively low-power light beam, by redistributing the material in a deformable film. In a disc configuration, positioning of the light beam is achieved by referencing to a previously recorded track. In a document storage and retrieval system the document is scanned with the resultant scanned signal modulating the writing light beam producing a recorded track. This track is optically read with the resultant signal applied to a printer. For optimum utilization of the area, the recording and readout take place at constant velocity.

Abstract: A compact heat storage system for over heated rooms in which a high value thermal mass is mounted in a forced air flow path formed within a refrigeration heat exchanger loop including a condenser at the inlet and an evaporator at the outlet interconnected with a compressor and an expansion control. The thermal mass is preferably PCM or the equivalent. In the heat storage mode, with the compressor in operation, the air flow is heated at the condenser so that the heated incoming air passes through the thermal mass with high thermal difference resulting in better thermal transfer efficiency. After passage, the air has been cooled by thermal transfer with the thermal mass and is further cooled by the evaporator and then passed back into the room significantly cooler than when entered.When the room space needs heat from the system, the fan is operated without the compressor to pull the cool air from the room through the thermal mass to heat the same.

Abstract: Pump module for liquid chromatography for delivering the mobile phase to a separation column under high pressure including a cylinder containing a plunger and forming a syringe pump, a seal disposed between the plunger and cylinder, two positive action valves connect to the output of the pump either to a reservoir of said mobile phase or to a sample injection valve. The pump is dimensioned to accommodate most chromatographic analysis i.e. from about 10 ml to 40 ml.

Abstract: A coupler or union for passing fluid under pressure from a column or tube in which the tube is received within a chamber in fluid communication through the floor within said coupler and forming a zero dead volume seal therewith, an annular recess in the coupler or union surrounding the tube or column and containing a balanced hydraulic seal in contact with the recess wall and tube or column and opening in communication toward said dead volume seal so that leakage from the latter under high pressure fills and activates the balanced hydraulic seal to the line pressure. The coupler or union is particularly applicable for high pressure liquid chromatograph column connections.

Abstract: Plastic seal plugs insert into each end of an elution column tube and are provided with flat gasket portions extending laterally to cover each tube end, a spring loaded hand-tightenable nut drives an end fitting from each end of a column holder extending alomst the length of the column to put the gasket portions and the tube in compression and create a seal between the end fitting, tube, at interposed gasket, the latter being entirely contained against cold flow or deformation by a close fitting recess in the end fitting which entirely captures the plastic gasket and tube end.

Abstract: A microwave powered turntable for use in microwave ovens includes a platform for supporting food which is mounted on a base that contains an electric motor and associated drive circuitry. The drive circuitry obtains power from an antenna projecting into a waveguide formed between the platform and base.

Abstract: A fluid thermosiphon system including a heat collection channel in communication above and below an insulating member to a heat storage region in a closed loop, the storage region includes spaced apart panels of an entirely encapsulated phase change material between which the heated fluid flows. The panels are adjacent the rear wall of the unit through which they disperse retained heat to the space. A wall or tilted roof unit suitable for built-in construction is disclosed, as is an exterior ground supported add-on unit. A liquid thermosiphon system is disclosed as the preferred embodiment. A gaseous system, using air, is also disclosed.

Abstract: A solar shutter or blind for windows using plastic vanes having horizontal channels for encasing a phase change material possessing a high value of heat of fusion at a fusion transition temperature somewhat above the desired ambient temperature of the room to be heated. In one form, the vanes are interconnected together with a reversing mechanism for turning the solar heat collection surfaces of the vanes inwardly or outwardly in relation to the window while in another form the vanes are swung as a unit to face outwardly as a shutter, alongside of a window or inwardly to reradiate energy through the window. In another form the vanes are pivotally mounted as a blind forming array and are provided with solar radiation reflective surfaces on one side and black surfaces on the lower side. In this way reversing the blind array causes reflection of unwanted or excess solar radiation and also provide diffuse illumination.

Abstract: A method of adjusting a mix of a previously recorded multi-track tape by displaying a plurality of fader levels associated with said previously recorded mix of said tape; displaying a plurality of fader levels associated with present levels of fader controls of a recording console; adjusting at least some of said display console fader levels to equal at least some of said corresponding displayed previously recorded fader levels, and in one form of the invention the further step of displaying said previously recorded fader levels and said console fader levels comprising positioning corresponding levels of said previously recorded fader levels in side-by-side relationship with said console fader levels, whereby comparison of said fader levels may be readily accomplished. Suitable apparatus is disclosed to carry out the foregoing.

Abstract: A microporous filter having pleated filter cartridge is provided with inlet and bypass ports for establishing tangential flow across outside boundary of cartridge inlet side resulting in slow clogging operation.

Abstract: The performance of microwave tubes at very high frequencies is limited by the ability of their thermionic cathodes to provide high emission current density in combination with long life and low evaporation of active material. An improved tube uses a cathode comprising a porous metal matrix consisting of a compacted mixture of tungsten and iridium particles, impregnated with a molten barium aluminate. Other alkaline earth oxides may be used as additives. The impregnated cathode outgasses easily and has a long life because it is not dependent on thin surface films. Thermionic emission is improved compared to a tungsten matrix, and barium evporation is reduced. The combination of power and frequency obtainable from the microwave tube is thereby significantly increased.

Abstract: A broad beam DC cold cathode electron gun with a plurality of plasma emitters formed by a capacitively coupled sliding spark assembly operable as a steady state as well as a pulsed device. Stabilization of the plasma emission current is attained through a feedback loop between the spark assembly and the grid bias supply.

Abstract: Gas analyzing system using sonic wave shift over tubular gas column. Reference gas passed through column calibrates system to zero reference level. Sample gas having unknown amount of known gas component causes shift of wavelength distance in column. Phase comparator looks at shifted signal over .+-.90.degree. of phase shift. Integrator responds to comparator output to give dc output signal proportional to phase shift. Compensating circuits in final amplifier estimate probable final value based on rate of change of initial comparator output and use same to drive output meter.

Abstract: A system and method for regulating power demand in a power distribution system by means of time-of-day metering or remote control of energy-consuming appliances. The system provides means for producing control signals which can be reliably sent to numerous customers over a power distribution system from a central location. Means located at each electric power meter or controlled appliance monitors the signal on the power line to detect an incoming control signal. When a signal reaches the customer, a switch is operated either changing the metering rate or controlling the electricity supply to an appliance. Steps in the preferred method include modulating the line frequency by means of at least one signal frequency. The incoming power signal is continuously monitored at the customer load or meter and any control signals detected serve to actuate a load control switch or the like.