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 |
| 4179059 | Automatic pipe welding apparatus and method A TIG pipe welding method which employs two sets of machine guide surfaces on the pipe ends. First radially inner guide surfaces cooperate with a sensor coupled to the welding torch to continuously monitor the arc gap between the welding electrode and the... | 12/18/1979 |
| 4157676 | Lap-joint fastener There is provided a fastener for forming lap-type joints wherein a sheet metal plate has a plurality of teeth projecting in a substantially perpendicular direction from both sides of the plate. On one side of the plate the teeth are in rows of single teet... | 06/12/1979 |
| 4105783 | Therapeutic treatment of dry skin Preventive as well as therapeutic treatment to alleviate the symptoms of disorders characterized by cracking, flaking or scaling of the skin consisting of the topical application of a lotion, cream or ointment containing one or more of the - or &#x... | 08/08/1978 |
| 4048299 | Anticaries confectionaries and oral health products Anticaries ingredients for corn and cane sugar containing confectionaries such as syrups, mints, and candies, and for oral health products such as mouthwashes, lozenges, toothpastes and toothpowders are presented. The anticaries ingredients include alipha... | 09/13/1977 |
| 3964663 | Apparatus for forming wooden joints The apparatus includes a conveyor table mounting press assemblies above and below the table respectively. Coils of connector plate stock having prepunched integrally extending teeth feed upper and lower press platens of the press assemblies, the platens b... | 06/22/1976 |
| 3959744 | CMOS oscillator having bias circuit outside oscillator feedback loop Disclosed is a highly stable CMOS oscillator for use as the master time reference in a wristwatch. A novel bias circuit comprising a CMOS pair and a relatively large resistor supply a bias voltage to the amplifier of the oscillator. The resistor can be ma... | 05/25/1976 |
| 3959755 | Circuit breaker with improved delay Disclosed is a magnetic circuit breaker having improved delay characteristics and particularly improved pulse tolerance. The trip coil of the breaker is spaced from the magnetic pole piece of a delay tube by a non-conductive, non-magnetic gap and the dela... | 05/25/1976 |
| 3956880 | Solid state wristwatch with charge coupled divider This invention relates to a solid state timepiece and more particularly to an electronic watch which employs no moving parts. In the present invention a frequency standard in the form of a crystal oscillator acts through a solid state electronic circuit d... | 05/18/1976 |
