Electric motor. (open access)

Electric motor.

Patent for improved electric motor used in motor vehicles "which may be associated directly with the driving-wheel of a motor-vehicle" (lines 40-41), bypassing the need for other power-transmitting mechanisms. Includes instructions and illustrations.
Date: July 20, 1897
Creator: Perret, Frank A.
Object Type: Patent
System: The Portal to Texas History
Oil-Converting Apparatus. (open access)

Oil-Converting Apparatus.

Patent for an apparatus that can be built at moderate cost, which will enable a high rate of commercially efficient work to reduce "the specific gravity of various grades of hyrdo-carbon oils, especially those of a semi-refined character" (lines 22 - 24).
Date: October 28, 1919
Creator: Adams, Joseph H.
Object Type: Patent
System: The Portal to Texas History

OK, USA: A Musical Guide Book to the States: Soldier Shows "Blueprint Special"

The last of the U.S. Army Soldier Shows "Blueprint Specials" to be published, "OK, USA" is a musical revue on the theme of U.S. soldiers returning to the United States and finding it finding it as foreign and exotic as any country overseas because they have been away and living under extreme circumstances for so long. Like the other "Blueprint Specials," this show includes a complete script (multiple copies this time); a conductor's score and complete set of instrumental parts; a sample program; set and costume designs; and detailed instructions for producing the show using whatever materials are at hand. Unlike the other "Blueprint Specials," it includes no information on the librettists, songwriters, and other staff who worked on the show.
Date: 1945
Creator: United States. War Department.
Object Type: Musical Score/Notation
System: The UNT Digital Library