Resource Type

Refrigerator (open access)

Refrigerator

Patent for a refrigerator made of wood with an inner shell of reinforced concrete and vacuum chamber or metal jacket. "The inner concrete shell is divided into four separate chambers, the former containing ice and the other three being adapted to contain food." (lines 61-64)
Date: April 11, 1922
Creator: Knutson, William K.
System: The Portal to Texas History
Power-Transmitting Mechanism. (open access)

Power-Transmitting Mechanism.

Patent for an improved power-transmitting mechanism for, "bicycles, motorcycles and similar vehicles whereby rotation is transmitted to the driven wheel without the use of chains, belts, gears or analogous elements commonly employed for this purpose" (lines 14-18). The invention will maximize driving power while minimizing energy expenditure (lines 19-24), employ a propelling mechanism, and reduce manufacturing and repair costs.
Date: March 11, 1919
Creator: Grubb, Orin A.
System: The Portal to Texas History
Internal-Combustion Steam-Generator (open access)

Internal-Combustion Steam-Generator

Patent for Internal-Combustion Steam-Generator and it uses.
Date: August 11, 1914
Creator: Sands, George H. Sands
System: The Portal to Texas History