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Gas Masks for Gases Met in Fighting Fires
Technical paper issued by the Bureau of Mines over the development of gas masks designed for fighting fires. The characteristics of the different types of masks in development are presented. This paper includes tables, illustrations, and photographs.
Date:
August 1921
Creator:
Fieldner, Arno Carl; Katz, Sidney H. & Kinney, Selwyne P.
Object Type:
Report
System:
The UNT Digital Library
Covering for Meats.
Patent for an aromatic asphaltum and paraffin wrap to preserve, protect from air and moisture, and transport meat that will not become brittle under cold temperatures.
Date:
October 18, 1921
Creator:
Pletcher, Lyle J.
Object Type:
Patent
System:
The Portal to Texas History
Trombone.
Patent, including illustration, for "a musical instrument slide and is more particularly designated as a bearing or stocking for a trombone or other similar instruments in which it is desirable to provide a smooth bearing for the slidable part of the instrument" (page 1, lines 9-13).
Date:
February 17, 1920
Creator:
Ackley, William D.
Object Type:
Patent
System:
The Portal to Texas History