On this day in 1904 John Homer Alexander was granted the patent for Hydraulic Air Compressor. U.S. Patent No. 763.239.
The object of this invention is to provide an improved apparatus for compressing air wherein a falling column of water is received by an air and water separating tank, which is connected with a hydraulic air-compression apparatus proper whose operation is such that the air compressed by it may be delivered to the same pipe through which the column of water falls, and thus be conveyed into the said separating-tank, whence it is conducted into a storage-tank.
