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AIR-BREAK SIGNALING AND RELEASEING DEVICE.
Patent for an improvement in air-brake release-valve in trains to signal train crews and release the breaks if they become set for any reason, or stuck, while the train is moving, including descriptions of the release valve and illustrations.
Date:
November 4, 1902
Creator:
Dukesmith, Frank H.
Object Type:
Patent
System:
The Portal to Texas History
World's Longest History Lesson: Unit 16. Secession (ASL Interpretation)
American Sign Language interpretation of Dr. Torget's lecture about the secession of Texas from the United States, covering: (1) John Brown's Raid, (2) The Election of 1860, (3) Texas and Secession. Video contains picture-in-picture rendering of slides and original narration.
Date:
2018-08-25T01:38:33/2018-08-25T02:22:27
Creator:
Torget, Andrew J.
Object Type:
Video
System:
The Portal to Texas History
World's Longest History Lesson: Unit 16. Secession
Video of Dr. Torget's lecture about the secession of Texas from the United States, covering: (1) John Brown's Raid, (2) The Election of 1860, (3) Texas and Secession.
Date:
2018-08-25T01:38:33/2018-08-25T02:22:27
Creator:
Torget, Andrew J.
Object Type:
Video
System:
The Portal to Texas History