Abstract: An automatic liquid delivery apparatus dispenses liquid from a liquid container or other liquid supply to a receiver or zone requiring liquid in response to a detector which is located in the zone and initiates discharge of the liquid. The liquid is retained against discharge from the container or supply by air pressure in a liquid passage and is discharged upon release of the air through the detector, when liquid is needed in the receiver or zone.The automatic liquid delivery apparatus in a liquid feeding system may be used to supply liquid to growing plants; a detector for each plant or group of plants initiates the dispensing of liquid by a delivery apparatus, each detector sensing the moisture requirements of a particular plant.

Abstract: The need to utilize alternative power sources for generating electricity is answered by harnessing the power of the tides in oceans. A power unit consists of a float with an opening therethrough which permits the float to ascend and descend a fixed column mounted on the ocean floor, the float being responsive to the variation in tidal height. Force linking means connecting the column and float transmit the linear power to a suitable form for an electrical generating means mounted on the float. The types of force linking means include a gear rack and gear means; helical gear combination means, gear speed-multiplying means and piston means.