Ant-Trap. (open access)

Ant-Trap.

Patent for a new type of ant trap that captures ants by having them crawl up a wooden central chamber and then fall into a sheer metal pit. Includes illustrations.
Date: December 8, 1891
Creator: Walker, Stephen A.
System: The Portal to Texas History
Design for Cam Wheel. (open access)

Design for Cam Wheel.

Patent for A Cam-Wheel that has opposite reversely disposed duplicate lobes of segmental form.
Date: March 8, 1898
Creator: Wheeler, Andrew Jackson
System: The Portal to Texas History
Plow. (open access)

Plow.

Patent for improvements in plow in which the plow can perform a variety of purposes and to obviate the necessity of employing more than one plow for accomplishing the same. The plow can be adjusted to run either on shallow or deep ground. Illustration is included.
Date: December 8, 1903
Creator: Campbell, John Daniel
System: The Portal to Texas History
Plow. (open access)

Plow.

Patent for a new and improved plow. This design "is capable of vertical adjustment, so that the plowshare and landside will be elevated out of contact with the ground in order to prevent the point from wearing out in transporting or moving it from one field or place to another; and it is furthermore provided with an improved fender and scraper, which prevents the dirt from clogging up and wearing the axle, and keeps the periphery of the wheel clear of mud or other matter that is liable to adhere thereto" (lines 27-37).
Date: February 8, 1887
Creator: Grimm, Frederick
System: The Portal to Texas History
Washing-Machine. (open access)

Washing-Machine.

Patent for a washing machine that combines parts, such as washing rollers, toothed wheels and segments, in an effective manner.
Date: August 8, 1916
Creator: Queen, Ernest N.
System: The Portal to Texas History