Abstract: A polymer film assembly includes a stack of two or more polymer films. At least one of the polymer films includes directionally oriented molecules. The stack includes a first polymer film and a second polymer film layered with the first polymer film. A contracted bond assembly couples the first and second polymer films of the stack. The contracted bond assembly includes heated and contracted configurations. In the heated configuration the contracted bond assembly includes a bond fusion zone and a film interface having directionally disoriented molecules and an interface width between the bond fusion zone and the remainder of the first and second polymer films. In the contracted configuration the film interface is a contracted film interface having a contracted interface width less than the interface width and a contracted thickness greater than one or more of film thicknesses of the first or second polymer films.

Abstract: An EM receiver instrument suitable for making underwater electric field measurements. The EM receiver comprises a dipole antenna; an AM modulator for applying modulation to a signal detected by the antenna; a fiber-optic voltage sensor and an application of AM demodulator for applying demodulation to the signal. The fiber-optic sensor may be an interferometric voltage sensor or a phase sensitive voltage sensor.

Abstract: An aerostat deployment system includes fore and aft envelope housings with respective folded fore and aft portions of an inflatable aerostat envelope therein. A support frame is interposed between the fore and aft envelope housings, and a payload is coupled with the inflatable aerostat envelope between the fore and aft envelope housings at the time of deployment inflation. One or more of the fore or aft envelope housings includes a brake configured to control unrolling of the folded fore or aft portions. In one example, the folded aft portion of the inflatable aerostat envelope including a tail portion is inflated prior to inflation of the folded fore portion.

Abstract: A submersible high current PWM-based source system for marine electromagnetic surveying for hydrocarbon exploration. The system converts a periodic, arbitrary digital signal to a high output current in a HED optimized for maximum dipole moment, using PWM modulation and real-time current regulation for precise output amplitude. The design and choice of components allows a wideband EM signal to be generated with sharp transition characteristics and substantially independent of the AC input power characteristics. This in turn enables for improved tailoring of an EM source signal for a specific subterranean prospect, and thus increased accuracy of the EM data.

Abstract: An EM receiver instrument suitable for making underwater electric field measurements. The EM receiver comprises a dipole antenna; an AM modulator for applying modulation to a signal detected by the antenna; a fiber-optic voltage sensor and an application of AM demodulator for applying demodulation to the signal. The fiber-optic sensor may be an interferometric voltage sensor or a phase sensitive voltage sensor.

Abstract: A power supply system uses improved Class G amplifier architecture for high bandwidth operation with low distortion. The power supply system switches between multiple power supply rails, depending on the signal level handled by the power supply system. The lowest usable supply rail voltage is chosen to minimize power dissipation in the output driver, thus optimizing efficiency. Each supply rail has an associated driver capable of sourcing current to the amplifier output. When a supply rail is selected, its associated driver is enabled and other driver(s) not associated with the selected supply rail are disabled via separate disable control signals. The disabling of the deselected driver may be delayed until current above a predetermined threshold is sensed at the output of the enabled driver. In addition, the frequency of switching between the power rails may be limited via various means designed to limit distortion in the power supply system.

Abstract: A power supply system uses improved Class G amplifier architecture for high bandwidth operation with low distortion. The power supply system switches between multiple power supply rails, depending on the signal level handled by the power supply system. The lowest usable supply rail voltage is chosen to minimize power dissipation in the output driver, thus optimizing efficiency. Each supply rail has an associated driver capable of sourcing current to the amplifier output. When a supply rail is selected, its associated driver is enabled and other driver(s) not associated with the selected supply rail are disabled via separate disable control signals. The disabling of the deselected driver may be delayed until current above a predetermined threshold is sensed at the output of the enabled driver. In addition, the frequency of switching between the power rails may be limited via various means designed to limit distortion in the power supply system.

Abstract: A method of producing a survey report on the presence and nature of a subterranean strata: includes simultaneously towing an EM field transmitter and a seismic source behind a vessel, towing at least one streamer behind the vessel, said streamer or streamers having EM field receivers for measuring an electric field and seismic receivers for measuring a seismic response, applying an EM field to the strata using the EM field transmitter and detecting an EM field response using the EM field receivers, applying a seismic event to the strata using the seismic source and detecting the seismic response using the seismic receivers, analysing the EM field response, analysing the seismic responses and reconciling the EM field response and the seismic response to produce the survey report.

Abstract: A protective package for an automobile part; as assembled, packaged and buttressed for shipping; minimizes or eliminates damage to the automobile part being shipped, by providing a carton, side rail supports in the carton to receive the part and padded supports to secure the part in the carton.

Abstract: A vehicle game lift adapted for releasable attachment to a trailer hitch mounted on a rear of a vehicle. The game lift is used for suspending a killed animal above a ground surface. The lift includes an inverted “L” shaped post having a vertical post member and a horizontal hoist arm. The hoist arm is attached to a upper portion of the vertical post member. One end of a trailer hitch tongue is adapted for attachment to a trailer hitch. An opposite end of the trailer hitch tongue is attached to a tongue collar. The tongue collar is received around a lower portion of the vertical post member. One end of a moveable horizontal suspension arm is attached to a sliding collar. The sliding collar is received around a portion of the vertical post member. An opposite end of the suspension arm is attached to a balance beam having a plurality of hooks thereon. The hooks are adapted for releasable attachment to the killed animal. A chain hoist is attached to the horizontal suspension arm and the horizontal hoist arm.

Abstract: A screen printing assembly attachable to a screen frame supporting a screen having a pattern. A support frame, which comprises a flat aluminum extrusion, is positionable adjacent and attachable to the screen frame. A squeegee assembly is movable relative to the support frame and positionable generally on the screen to press ink through the screen. A sealed chamber is connected to the bottom of the support frame and positionable generally adjacent the screen. The squeegee assembly presses the ink through the screen within this sealed chamber. The sealed chamber safety contains the printing ink solvents which are deposited in it. A flexible plastic sheet forms the upper surface of the sealed chamber. This sheet, which can have ultra-violet properties, rolls at its opposite ends about rod assemblies. The sheet is attached to the squeegee assembly and moves with it between these rod assemblies. Tension springs mounted in the rod assemblies keep the sheet taut.

Abstract: A screen printing assembly attachable to a silk screen frame including a support frame positionable adjacent and attachable to the screen frame. A squeegee and flood bar assembly deposits and forces ink on and through the screen and onto a substrate disposed adajcent the screen. The assembly includes a mechanism movable along the support frame and the screen frame and a flexible sheet is attached to and moves with the mechanism. The flexible sheet is sealed to the support frame, and forms in part a sealed chamber in which the squeegee and flood bar assembly deposits the ink on the screen. Solvents can be sprayed into the sealed chamber which contains the solvent so that it does not escape not the atmosphere. An inert gas is injected into the chamber displacing the oxygen in it so that the ink does not dry out as rapidly, and safely maintaining the contained solvent. A method for screen printing using this sealed chamber.

Abstract: A bag made of two layers of film material welded together along their edges except at an aperture in which is inserted one end of a tube of the same material as the bag, the entire circumference of said tube being tightly sealed to the sides of the bag aperture by heat welding.

Abstract: A method and an apparatus for affixing labels to a web of sheet or film material by means of a cylindrical labelling device having a label arranged peripherally thereon, said label being affixed to the web with a pure rolling motion and compressive action.