Resource Type

Carbon-Brush Holder (open access)

Carbon-Brush Holder

Patent for a carbon-brush holder that provides the user with novel means of holding a carbon brush. Through this device, users can more efficiently transmit an electric current from the brush to motors, dynamos, or commutators.
Date: May 28, 1918
Creator: Knight, James H.
System: The Portal to Texas History
Head for Hammers and Other Tools. (open access)

Head for Hammers and Other Tools.

Patent for heads for hammers, hatchets, axes, and other similar tools that prevents the handles from becoming loose in the heads, and that can also tighten the handles in the heads. Includes illustration.
Date: May 28, 1918
Creator: Mosley, Noah S.
System: The Portal to Texas History
Dispensing Apparatus (open access)

Dispensing Apparatus

Patent for an improvement in Dispensing Apparatus adapted to dispense the material and at all times excluding moisture and air from the receptacle.
Date: October 28, 1918
Creator: Llewellyn, John Thomas
System: The Portal to Texas History