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Electric Meter.

Description: Patent for a simple and inexpensive electric meter that measures and records "the time during which an electric translating device, such as a motor or light, is connected with the source of supply, such as a dynamo-electric machine, located at a central station" (lines 11-15). Anyone can understand how it works, and it is more accurate than other meters.
Date: January 7, 1896
Creator: McGrath, William H. & Oram, John M.
Item Type: Refine your search to only Patent

Post-Driver.

Description: Patent for a machine that drives posts and "can be placed on the running gear of a vehicle in such a manner that it can be readily adjusted to operate on posts at either side of the longitudinal axis of the vehicle" (lines 14-18). It can be easily adjusted and is simply constructed.
Date: April 18, 1893
Creator: Harris, Stephen G.
Item Type: Refine your search to only Patent
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