Abstract: An arrangement of a plurality of individual gas expansion marine sources, wherein the positive waves of the primary shocks are additive in effect, the negative waves of the primary shocks are additive in effect to cause blow-out so that the reflections are relatively small or ghost-free with respect to the positive, and wherein the positive and negative waves of the after-shock occurrences do not enhance one another.

Abstract: A portable stove for supporting stove utensil and heating same with a fuel element, including a support plate, plural support legs pivotally mounted with the support plate for supporting the same, a fuel receptacle with the support plate for receiving the fuel element for heating the stove utensils and spacer members with the support plate for spacing the stove utensils a predetermined distance from the upper surface of the support plate for proper heating thereof.

Abstract: A drill string stabilizer in which the wall-contacting wear elements are secured in their accommodating slots by an undercut along each side and a tapered wedge-receiving notch along the underneath side for accepting one or more wedge pieces. In one embodiment, the tapered notch is along the side of an axially elongate slot and a plurality of wedges are located in securing position along one side. In another embodiment, there are tapered notches along the center between two separated sections of wear elements. In a third embodiment, the slot for the wear elements is not axially elongated but on a spiral angle. In a fourth embodiment, a pluraity of short wear elements are employed end-to-end, each with its own wedge piece and each also located on a thrust-bearing and locating pin.

Abstract: An improved hand tool includes a well at the top of the handle into which the upper end of the shank extends. The well is adapted to receive a torque producing socket wrench drive which engages the shank in order to transmit the torque producing drive directly to the tip of the hand drive tool. In the preferred embodiment the shank which extends into a well has a hexagonal cross-section and is adapted to cooperate with a standard socket wrench. Tips of various configuration may be employed.

Abstract: High resolution, high penetration marine seismic stratigraphic system wherein a slanted cable comprising spaced-apart hydrophone arrays gather seismic reflections so that the corresponding primary and ghost reflections from a common interface gradually are spaced apart. The primary reflections are time aligned and stacked. The ghost reflections are phase reversed, time shifted and time aligned to coincide with the time aligned primary stack and then stacked to give a combined primary and ghost stack, which effectively includes almost twice the information as from the primary stack alone. No inverse notch filters are needed to correct for the ghost phenomenon. Focused noise out of the vertical plane is also virtually eliminated.

Abstract: A liquid sight monitor including an internal sight tube surrounded by an external sight tube, the ends therebetween being spaced apart by inserts including "O" rings sealing against both tubes. The internal annulus between the tubes can be environmentally purged. A protective shield can be provided, which also provides mounting flanges for supporting the overall apparatus in position for metering the system.

Abstract: Automatic control apparatus for starting and then stopping and for continuing cyclical operation of an engine including two timer means, one for determining the running/not running ratio of the engine and the other for determining how long starting power is applied to the engine start system, typically the solenoid of a starter motor. One embodiment includes a vacuum switch for sensing and preempting the second timer operation when the engine is started and there is a vacuum present in the manifold. The preferred embodiment also includes adjustable controls for setting both timer means, these same means having switching contacts capable of carrying full power to the solenoid or other engine start component.

Abstract: A circuit for energizing a gaseous discharge lamp at high frequency utilizing a thyristor, preferably an SCR. The energizing circuit for the lamp includes a resonant or tank circuit operating at an appropriate high frequency, preferably above the acoustic resonant frequencies of the lamp, and which also commutates an SCR. The cathode/anode of the SCR is connected to a voltage adjusting network to provide an initiating pulse through the SCR to start oscillations in the resonant or tank circuit when the SCR is gated on and which reduces the applied supply potential to the SCR during its conduction period to ensure non-conductive latching of the SCR when the gate thereto is removed by lengthening the natural commutation interval of the SCR. This permits the SCR to be used as a switch at the high frequencies involved, normally about 60 kHz.

Abstract: An enclosure for a light fixture and the method for making such an enclosure via the securement of a plastic or glass lens, wherein the light fixture has a window which does not have to be opened in normal use for replacement of bulb, but is normally accessible through a rear or side opening. The window opening is circumscribed with a front flange projecting radially outward. A double sided adhesive tape is affixed to the flange and is united with the lens. A metal cored trim covers and secures the flange and the unified tape-and-lens structure. This latter assembly may be further secured by crimping.

Abstract: An electronic controller for providing one or more sequences of control outputs for a plurality of controlled devices. The controller includes a pulser which produces pulses at the rate of the frequency of an ac source, a divider for producing spaced pulses preferably at one-second intervals, a counter for counting a large number of these spaced pulses and one or more PROM's. The PROM's select and actuate one or more sequences stored therein and produce controlling outputs on a plurality of lines to a plurality of controlled devices.

Abstract: A light reflector system for an elongated light source and having multiple reflective surfaces, some of which are treated for diffusing light, particularly those surfaces that reflect light at low reflective angles, and some of which are specular or, alternatively, treated for light spread reflection, particularly those surfaces that reflect the image of the lamp source at high reflective angles.

Abstract: A light fixture comprising parabolic reflector segments therein, the lamp being located at the focal point of the segments. One segment has an arc preferably more shallow than the other segment. The window opening is angled preferably at an angle of 60 degrees to the elongate axis of the parabolic segments to provide sharper light cutoff or less spill light from one reflector segment than from the other. A shield positioned parallel to the elongate axis and on the side of the axis within the reflector segment where the cutoff characteristics are the greatest, permits primary reflected light from the lamp, while preventing direct light from the lamp to pass above the shield. The specular underside of the shield enhances light reflection therefrom while the darkened top shield surface blocks secondary reflection above the cutoff angle.

Abstract: A holder of slightly flexible plastic having oppositely aligned wedging end pieces for clampingly securing a tape cartridge and suitably structured to clamp onto a vehicle sun visor regardless of the size of such visor. One embodiment also includes an auxiliary sun screen, as well.

Abstract: An improved apparatus for cutting vegetation which is especially adapted to be employed with units having a top mounted gasoline motor interconnected by a drive tube to a lower rotating cutting head. An accessory handle is carried adjacent the motor. A housing carried on the lowermost drive tube encloses bearings and provides a journal for the cutting head. An actuator housing bolts to the housing and interfits for rigid support. A mechanical line feeder on the cutting head is operated by an actuating lever carried on the accessory handle through an interconnecting control cable. Reciprocation of the control lever operates the mechanical line feeder so that a predetermined length of cutting line is extended from the cutting head during rotation without interrupting cutting.