Collection
Serial/Series Title
Country
Counties
3 Matching Results
Results open in a new window/tab.
Results:
1 - 3 of
3
Palo Pinto Sheet
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:125000
Date:
1918
Creator:
United States. Army. Corps of Engineers.
Object Type:
Map
System:
The Portal to Texas History
Internal-Combustion Engine.
Patent for "improved construction and arrangement of parts of two cycle motors" (lines 15-17) of gas engines involving the compression and introduction of additional explosive material into the explosion chamber at the end of each cycle of movement. This invention intends to improve the efficiency of gas use, cool the motor's cylinder walls more easily, and delay the wearing of piston rings.
Date:
August 6, 1918
Creator:
Brevard, Procter
Object Type:
Patent
System:
The Portal to Texas History
Tire.
Patent for an improved tire designed with "necessary resiliency without requiring inflation" (lines 14-15). The internal core is designed in such a way that if will not collapse when punctured.
Date:
December 17, 1918
Creator:
Huffman, Orla L.
Object Type:
Patent
System:
The Portal to Texas History