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Manufacturers Index - Hill Machine Works
Patents
This page contains information on patents issued to this manufacturer.

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Key to Links for Patent Information

USPTO = U.S. Patent Office . Images of the actual patent can be viewed on the U.S. Patent Office web site but a special TIFF viewer must be installed with your browser in order properly work. More information on how to configure your computer to view these patents can be found at TIFF image Viewers for Patent Images.
DATAMP = Directory of American Tool And Machinery Patents . A sister site to VintageMachinery.org with information on patents related to machinery and tools. A much easier user interface than the USPTO's for finding information on machinery patents.

Patent Number Date Title Name City Description
484,069 Oct. 11, 1892 Steam-engine Max Ulrich Northampton, MA "My invention is embodied in an oscillating-cylinder steam-engine, and relates, mainly, to the construction of the valve mechanism and ports by which steam is conveyed to and exhausted from the engine. The engine is double-acting, and the cylinder is pivoted substantially at the middle of its length upon trunnions that support it and receive the thrust or reaction of the steam that impels the piston, and the valve-action depends upon the oscillation of the cylinder, by which port-openings in a valve-piece carried by and oscillating with the cylinder are caused to alternately register with live-steam and exhaust ports in a stationary steam-chest..."