Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 3939331 | Railroad track survey apparatus The error signal corresponding to the deviation of the actual track position from the desired track position is applied to three pairs of threshold stages each pair consisting of one stage furnishing a threshold output signal if a positive error signal ha... | 02/17/1976 |
| 3937076 | Device for testing tyres for vehicles A tyre testing device comprises a track and a hub mounted on a carriage which can be moved towards and away from the track. The hub can be pivoted about mutually perpendicular axes to simulate changing values of camber angle ଲ and angle of lock �... | 02/10/1976 |
| 3934452 | Method of determining dynamic strains in composite structures A method for determining strain amplitudes in each component, during cyclic straining of a 2-component structure in which at least one component shows non-linear viscoelastic behavior. The heat generation rates of each component are determined experimenta... | 01/27/1976 |
| 3933036 | Tread-wear prediction A method of predicting tread-wear for pneumatic tires, the method incorporating laboratory measurements of pressure and traction data exerted by selected tires against a surface, and the collection of actual treadwear data from road-testing of the tires i... | 01/20/1976 |
| 3930918 | Method of preparing a steel cord for the measurement of stress therein Disclosed is a method and apparatus for measuring stresses in a wire or wire cord, such as that found in the reinforcing belt of a pneumatic tire. A portion of the wire is encapsulated in a solder material which is machined such that a rectangular solid b... | 01/06/1976 |
