5 Matching Results
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5
Crown Setter
Patent for a crown setter that can make impressions of varying sizes with the same tool.
Date:
July 6, 1920
Creator:
Lewis, Samuel Riley
System:
The Portal to Texas History
Key-Ring Clip.
Patent for new improvements for key ring clips that will not detach in a seated position.
Date:
July 6, 1920
Creator:
Evans, William
System:
The Portal to Texas History
Pump.
Patent for a pump for deep wells with a "specially constructed piston capable of a powerful working stroke and which will secure at all times a full volume of liquid at each stroke of the pumping rod." (line 25) including instructions and illustrations.
Date:
July 6, 1920
Creator:
Humason, Granville Allison
System:
The Portal to Texas History
Sanitary Fly Catcher and Trap.
Patent for improvements in traps to bait flies and trap them.
Date:
July 6, 1920
Creator:
Harris, Raymond J.
System:
The Portal to Texas History
Fire-Extinguishing Device.
Patent for fire extinguishing devices to "supplying steam to the fluid so that oxygen sufficient to support combustion will not reach the flame" (lines 14-16).
Date:
July 6, 1920
Creator:
Byrd, Williman Harvey
System:
The Portal to Texas History