Crude-Oil Burner (open access)

Crude-Oil Burner

Patent for a crude oil burner for stoves or heaters. Illustrations included.
Date: January 3, 1911
Creator: Risley, Carolile
System: The Portal to Texas History
Clinometer or Slope Measurer. (open access)

Clinometer or Slope Measurer.

Patent for a new and improved clinometer. This design "is to provide a simple and inexpensive device for taking measurements in prismoidal formula and to avoid the calculation of the triangle and enable the slope to be readily written from the instrument" (lines 16-21). It "compris[es] the square composed of the stationary short bar or arm and the stationary long bar or arm rigidly secured to one side of the short arm or bar and provided on its face with a spirit-level and having a scale of graduations of which the length of the short bar or arm is the unit, the curved brace connecting the said parts" (lines 60-68).
Date: January 6, 1891
Creator: Parks, James Harvey
System: The Portal to Texas History
Map Hanger (open access)

Map Hanger

Patent for improvements in map hangers. The purpose is to provide a map exhibiting hanger to use in support for a plurality of maps, particularly maps that have information on the back.
Date: January 31, 1922
Creator: Chunn, Richard M.
System: The Portal to Texas History
Oil-Burner (open access)

Oil-Burner

Patent for new improvements to oil-burners in stoves and furnaces providing "a proper inlet of air to fire generated on the hearth" (lines 14-15) including instructions and illustrations.
Date: January 23, 1912
Creator: Braly, Hugh L.
System: The Portal to Texas History