The Fountain Pen Patent Archive

The instruments that put ink under pressure

Waterman patent

Patent drawing of a fountain pen shown in longitudinal cross-section with a tapered cap, hard rubber body, and a detailed feed-bar containing a grooved ink duct, alongside five smaller circular cross-sections labeled Fig. 3 through Fig. 6 illustrating variations of the feed duct with tiny conical storage pits.FOUNTAIN-PENArthur A. Waterman · February 14, 1899Patent drawing of a hard rubber fountain pen shown in longitudinal section, revealing an internal piston-and-valve pump within the barrel, a threaded end plug, a feed bar leading to the nib, and several detail views of the valve, piston, and pump-actuator mechanisms.FOUNTAIN-PENArthur A. Waterman & Frederick W. Stevens · September 19, 1899Technical patent drawing showing a fountain pen barrel in longitudinal section with a pivoted lever, presser bar, and ink sack, along with detail views of the lever's frame and locking mechanism.PRESSER-BAR-ACTUATING LEVER FOR SELF-FILLING FOUNTAIN-PENS.William I. Ferris and Edwin F. Britten, Jr. · September 5, 1916Patent drawing of a fountain pen barrel cutaway showing a hinged lever mounted in a metal box frame that presses a bar to deflate an internal ink sack, with additional detail views of the lever, frame blank, and pivot pin assemblies.MOUNTING FOR PRESSER-BAR-ACTUATING LEVER FOR SELF-FILLING FOUNTAIN-PENSEdwin F. Britten, Jr. · May 29, 1917