Abstract: An irrigation sprinkler which may include a pop-up assembly driven by a water-flow powered motor. A nozzle is mounted on the upper end of the pop-up assembly and is rotated through an adjustable arc to irrigate a sector of a particular size, and it is automatically reversed at the end points of the selected irrigated sector to oscillate back and forth across the sector. The sprinkler is constructed so that if the pop-up assembly is rotated forceably beyond its preset arc of coverage, either by vandals or others, the sprinkler itself is not damaged, but it will automatically reset itself into its previously preset arc of coverage.

Abstract: An irrigation sprinkler with an internal assembly which is caused to turn back and forth through a preset arc so that a nozzle at the upper end of the assembly may irrigate a sector of land of a particular size, and in which the internal assembly arc of the internal assembly is adjustable by depressing a spring-loaded arc-adjust screw in the end of the assembly by a small standard screwdriver, or the like, and rotating the screw either clockwise or counterclockwise to decrease or increase the arc.

Abstract: A power supply for outdoor lighting systems accepts ordinary household alternating current of 120 volts at 60 hertz. The power supply uses a digital switching means to convert this current into a lower voltage at a higher frequency. Typically, these values are 28 volts at 20 kHz. This high frequency signal is then supplied to the lights through a transformer. The use of a higher voltage than that normally used for such systems improves the operating efficiency of the lighting system and allows lights to be placed at a greater distance from the power supply. The higher frequency signal reduces the bulk and cost of the transformer. The voltage and current supplied to the lights can be altered by changing the frequency of the signal entering the transformer. A feedback circuit monitors the signal supplied to the lights and automatically varies the frequency so as to keep the voltage and current within predetermined operating limits.

Abstract: A solid state electronic controller for electrically-operated water sprinkler valves in an irrigation system. The controller is constructed to control a number of different water sprinkler valves in each of a number of different watering zones, for successive time intervals at one or more preset time periods during each day of the week. The controller includes a liquid crystal display which exhibits instruction words and numbers to facilitate the programming of the controller, for monitoring the operation of the controller, and also for exhibiting malfunctions in the system.

Abstract: A waterproof housing which is intended to be buried in the ground, and which serves to protect the splices of buried electrical cables such as are used, for example, in irrigation control systems. The housing is formed of two identical half-sections configured to snap together around the crimped splice of two or more cables. Each half-section is pre-filled with a plastic insulating gel which becomes adhesively attached to the crimping sleeve of the splice and which forms a perimeter seal around the splice. Troughs are provided at one end of each section as a means of entry for wires to be spliced. Thin frangible dams are molded onto the outer ends of the troughs to maintain the gel in the half-sections during filling, and which are crushed by the cables when the two half-sections are pressed together.

Abstract: A pop-up irrigation sprinkler which includes a riser which is forced by water pressure up out of a body through a cover attached to the top of the body. The riser is normally held in a retracted position by a coil spring. A nozzle is removably attached to the upper end of the riser. An adjustable screw is threaded into the nozzle to adjust the flow rate of water through the nozzle to control both the flow rate and the radius of the watering pattern. An elongated filter is removably mounted on the inner end of the nozzle, and the filter extends down into the riser. The filter has a head having an orifice therein and which defines a conical seat for the screw. An adapter is interposed between the nozzle and the riser and serves to trap the head of the filter to enable different types of nozzles from different manufacturers to be used in the sprinkler.