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6 Matching Results
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Clutch and Transmission Device
Patent for new and useful improvements in the development of clutch and transmission devices.
Date:
February 22, 1921
Creator:
Hubbard, Adra M.
System:
The Portal to Texas History
Motor- Driven Tire- Pump
Patent for Motor-Driven Tire Pump. Motor tire pump that helps inflate tires.
Date:
February 8, 1921
Creator:
Guthrey Gordon N.
System:
The Portal to Texas History
Screen Fastener
Patent for the attachment method for wire screens to a frame to prevent the detachment of the wire screen from the frame.
Date:
February 22, 1921
Creator:
McCaffrey, Horace
System:
The Portal to Texas History
Underreamer.
Patent for a strengthened and improved underreamer for more effective well drilling.
Date:
February 15, 1921
Creator:
Montgomery, Gustavus A.
System:
The Portal to Texas History
Perpetual Calendar.
Patent for the improvement of calendars to create easier-to-read and quicker-to-adjust. These calendars were to be able to be used no matter the month or year and would always be accurate.
Date:
February 1, 1921
Creator:
Jones, L. Walter
System:
The Portal to Texas History
Current-Motor.
Patent for a current motor in which water wheels are employed to drive electric generators. The design provides for pontoons to allow the water wheels to be adjustably supported. Constructed in sections, additional sections can easily be added and bracing is included so that the units can be configured to rise and fall together.
Date:
February 15, 1921
Creator:
Rebman, Johan J.
System:
The Portal to Texas History