ety valve. The pumps are mounted on a small cistern, pressing of printed sheets. It is in practical use in the Government Printing Office at Washington, and in the State which contains the water supply. passes through a valve, F. An electric alarm is provided which sounds when the limit of pressure… … could be if they were placed from two upon the writing on the gelatine and to six or more between fuller or glazed rub the back with the hand. From JONES' PRESSING MACHINE-FRONT. boards and subjected to great pres- forty to fifty can thus be drawn off in sure. It will be readily seen that by a few…
Patented · Patents · Iron · Consists · Manufacture · Scientific American · Improved · American goods · Writing telegraph · American supplement · Long time · Short time · Letters patent · Rio grande · Sewer gas · Watson cell
Internet Archive · Public domain (published before 1931). Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten02unit-498-213.webp)
