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in subjects: "ventilation systems"  
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Improvement in ventilating cars, &c.

Description: Patent for a system which prevents ashes and cinders from railroad engines from entering the train cars and also allows for ventilation of the cars. Includes illustration.
Date: August 22, 1876
Creator: Andrews, Wright S.
Partner: UNT Libraries Government Documents Department

Means for Ventilating and Expelling Water from Mines.

Description: Patent for a ventilation and water pumping system for mines, which pumps out water underground, removes foul air and gases, and keeps the mine supplied with fresh air through pressurizing the air in the mine.
Date: July 21, 1908
Creator: Durack, Patrick H.
Partner: UNT Libraries Government Documents Department

Car-Ventilator.

Description: Patent for a railroad car ventilator, which supplies fresh air to the car and sends stale air out of the car. It also is equipped with an ice cooling system and a disinfectant spray system.
Date: March 9, 1909
Creator: Carroll, Samuel C.
Partner: UNT Libraries Government Documents Department
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