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: Apparatus including two endless aprons, one operating inside the other, the top strands thereof forming a contact zone therebetween. The aprons are angled with respect to each other preferably between 130 and 150 degrees. The yarn applied through the zone is twisted upstream of the zone with respect to a variably adjustable, insertion length stop. The yarn can be heat treated, if desired, upstream or downstream of the contact zone. Alternatively, two or more yarn strands also can be false-twisted in parallel paths through the zone and joined thereafter. By changing the length of insertion of one strand with respect to the other, alternated twist is provided to the combined yarn.

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 light fixture for housing an elongated lamp and method for making same, the fixture having an elongated housing constructed from a continuous rectangular piece of sheet metal having four parallel bends therein forming planar side walls. The planar side walls form flange planes suitable for mating within grooves formed in suitable end pieces for the housing. The closure lens completes the housing. The construction of the elongated housing side walls is such that a reflector sheet when curvedly affixed to the two outermost planar side walls is tangential to the inner three planar side walls, thereby providing a parabolic reflecting surface for a lamp mounted within the reflector sheet. Two end wall reflectors, preferably one of which is directionally adjustable, also reflect luminous flux from the lamp.

Abstract: Disclosed is a stabilized optical system, including a housing, an objective lens group mounted to the housing for collecting light from the image to be viewed, and an eyepiece lens group adjustably mounted to the housing for focusing the image at the eye of a viewer. Pivotally mounted between the objective and eyepiece lens groups is a roof Pechan prism. The prism is connected through a rigid gimbaled linkage to a gyroscopic stabilizer which is offset from the optical axis, so that rotational motion of the housing is not transmitted to the prism, thereby stabilizing the image viewed through the optical system. The gyroscopic stabilizer is provided with a damper for minimizing nutational motion of the stabilizer and a precision compensator for counteracting the precession of the gyroscope. The eyepiece lens group includes a negative lens component positioned between the objective lens group and the remaining components of the eyepiece lens group.

Abstract: The process of an apparatus for asymmetrically heat treating chemical yarns by applying different temperatures on either side of a plane passing through two generatrices of a peripheral surface of each orifice through which the yarns are extruded during production. One side of the plane is preferably at a temperature slightly higher than the melting point of the material and the other side of the plane is preferably at a temperature slightly lower than the decomposition point of the material.

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: The central station of a radio-connected seismic surveying system uses a tethered blimp carrying an antenna and an electronics package including a dc voltage/rf decoupler, a variable dc controlled preamplifier, a P-I-N diode switch for changing the antenna from receive to transmit operation, a transmitter and modulator and a battery. An rf coaxial cable to ground provides means for controlling the preamplifier gain and for switching the central station to the transmit mode by using appropriate dc signals. In the receive mode, the cable carries detected field unit seismic signals, which are detected by the blimp-carried antenna and preamplified by the blimp preamplifier, to the ground for suitable recording and further processing in the ground portion of the central station. An audio channel can also be modulated onto the transmit carrier of approximately 70 MHz to provide voice communications via the blimp electronics, if desired.

Abstract: A network for the development of a square wave in a first time period as set by the timing occurrence of a first voltage to a predetermined threshold level and another network for the development of a square wave in a second time period as set by the timing occurrence of a second voltage to a predetermined threshold level. One square wave is chopped at a high frequency rate and the second square wave is chopped at the same high frequency rate, but by a chopping signal which is polarity inverted in phase from the first chopping signal. One of the chopped signals is polarity inverted before being combined with the other chopped signal to form a composite voltage. Separate lamp control networks can select between the two chopped signals to control dimming networks. The two chopped signals can overlap in time occurrence without interfering with the operation of each other.

Abstract: A dimmer and regulation circuit connected to an incandescent lamp load for controlling the voltage thereto from an ac source by gating off a portion of each cycle. The circuit used to provide the gating includes a pulse generator controlled by a timer producing a rectangular wave output. The input to the timer is from an operational amplifier, the inputs to which are, in turn, from a variable control voltage setting and from a load sensing network including components for non-linear curve shaping processing, such as in accordance with the IES square law curve. These inputs operate in a closed loop feedback system to provide line and load regulation after the sensed load voltage passes through the square law shaping network. This non-linear network includes a half wave rectifier and a capacitor that is part of two time constant networks, and which accumulates a charge during one-half of a cycle through a first resistance path and which discharges through a second resistance path.

Abstract: A protection circuit for producing one or more triggers in the presence of a monitored overvoltage condition employing a complex voltage divider network including slow-acting breakover semiconductor devices for sensing ac voltage overloads in either or both polarities thereof, and operating gated semiconductors by controlling the voltages applied to both the gates and the main terminals thereof, which, in turn, discharge capacitors for trigger production. Monitoring may be with respect to supply voltage, power supply output voltage or one or more independent voltages.

Abstract: A frame for covering the border area of a wall-mounted display, including a plurality of nails with first heads at the driven end of the nail and second heads axially displaced from the first heads. A resilient structure for supplying directional pressure, such as tension spring wires, is located between the two heads radially extending beyond the first heads when expanded. The nails are driven through the display with the second nail heads holding or mounting the display on the wall. Each of the frame strips includes apertures in its underside which are larger than the first nail heads but smaller than the tension spring wires, permitting such frame strips to pass over the first nail heads and the tension spring wires contracting the wires in the process. These tension spring wires expand to hold the frame in place by resilient action.

Abstract: A regulation circuit for providing timing gate signals to the dc power section of a power supply, the regulation circuit utilizing phase angle conduction of a programmable unijunction transistor. The conduction angle is determined by the occurrence of the cycles of the ac source voltage unless earlier conduction is determined by the sensed dc voltage. Early conduction occurs when the control voltage to the PUT is allowed to build up beyond a predetermined level when the sensed dc voltage is low. When the sensed dc voltage is high, an electronic switch closes to discharge a storage element to prevent control voltage build up and, hence, early conduction. Ac source voltage failure also causes closing of the electronic switch to prevent undue regulation of the power section output at such times and to permit storage capacitors therein to maintain a dc output until source voltage is reestablished.

Abstract: A regulation circuit for providing timing gate signals to the dc power section of a power supply, the regulation circuit utilizing phase angle conduction of a programmable unijunction transistor. The conduction angle is determined by the occurrence of the cycles of the ac source voltage unless earlier conduction is determined by the sensed dc voltage. Early conduction occurs when the control voltage to the PUT is allowed to build up beyond a predetermined level when the sensed dc voltage is low. When the sensed dc voltage is high, an electronic switch closes to discharge a storage element to prevent control voltage build up and, hence, early conduction. When there is an ac source voltage outage, a diode connected to the control voltage output conducts to keep the control voltage to zero and hence closing of the electronic switch to prevent undue regulation of the power section output at such times and to permit storage capacitors therein to maintain a dc output until source voltage is reestablished.

Abstract: A circuit for providing a dc pulse, such as to a gated semiconductor for at least partial bypass of a ballast element connected to an HID lamp, the pulse being developed within a time range of an associated ac voltage. A first timer operably connected to the ac voltage produces a first dc output pulse and a second timer connected to the output of the first timer produces the circuit dc pulse output. Reduction of a threshold control voltage of the first timer permits a time constant network connected thereto to advance the conclusion of the output of the first timer forward within its operational range. A time constant network connected to the second timer has charge current added to it from the first timer control voltage, the amount of such current decreasing with an advance positioning of the output of the first timer, thereby increasing the slope of the charge-up voltage of the second time constant network and shortening of the related square wave or dc pulse output from the second timer.

Abstract: This invention concerns introduction of a silicone-containing composition and a liquid hydrocarbon propellant into an oil and gas reservoir. The silicone-containing composition improves the interface between the reservoir fluids and solids facilitating release of natural gas dissolved or entrained in oil and water. The liquid hydrocarbon propellant assists in dispersement of the silicone-containing composition in the reservoir and increases the mobility of the oil by lowering the viscosity of the oil through dilution. The action of the silicone-containing composition improves recovery efficiency through conservation of primary and secondary energy.

Abstract: A dimmer circuit for a high intensity, gaseous discharge lamp having a ballast with a reactive portion, the current bypass or partial bypass of which determines the brightness of the lamp, the bypass being controlled by gated bypass means, preferably in the form of a triac, driven by the photodrive element of an optocoupler, the light emitting diode element of the optocoupler receiving pulses and actuating the photodrive element for passing a gate trigger signal to the gated bypass means.

Abstract: The invention relates to the re-utilization of cement slurry previously regarded as waste. The method involves separating water from the slurry so as to concentrate it, agitating the concentrated slurry so as to keep it in uniform disperson and disposing of the concentrate by mixing it in controlled proportion with fresh concrete. Apparatus is described which concentrates cement slurry and stores it as a suspension of suitably uniform density for disposal in the above manner.