3 Matching Results
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Fluid Pressure Regulator
Patent for a new and useful gas pressure regulator. This invention "relates to gas-pressure regulators especially adapted for use with gas stored under high pressure in a cylinder or similar portable storage vessel" (line 8 - 11).
Date:
December 28, 1897
Creator:
Clark, George Greenleaf
System:
The Portal to Texas History
Letter Copying Roller
Patent for a new and useful letter copying roller. This invention is to "provide a simple device for facilitating the copying of letters without the use of a press, blotters, pads, and similar appliances usually employed for this purpose (line 9 - 13).
Date:
December 28, 1897
Creator:
Roux, Harry L.
System:
The Portal to Texas History
Railway - Switch.
Patent for a new and improvement in automatic safety railway-switches to "enable the motorman or conductor to conveniently and accurately insure the proper setting of the switch without leaving this position" (line 16 - 19).
Date:
December 28, 1897
Creator:
Girardeau, St. Julien & Murray, Richard James
System:
The Portal to Texas History