"Everyone acquainted with the subject will recognize it as a conspicuous failure."
Henry Morton, president of the Stevens Institute of Technology ; Said in 1880 about the light bulb
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| Number | Title | Issue Date |
| 5107128 | Method and apparatus for detecting flame with adjustable optical coupling A method of detecting flame within a region where flame is expected. Radiation emissions from the region are measured within selected portions of the visible and infra-red frequency bands. Spectral characteristics of the two measurements, including their ... | 04/21/1992 |
| 4983853 | Method and apparatus for detecting flame A method of detecting flame within a region where flame is expected. Radiation emissions from the region are measured within selected portions of the visible and infra-red frequency bands. Spectral characteristics of the two measurements, including their ... | 01/08/1991 |
| 4471355 | Method and apparatus for sensing current in high voltage conductors Alternating current carried in a high voltage conductor is sensed by a toroidal coil to produce a first low level signal representative of the alternating current signal. Transmitter means operating at or near the potential of the conductor and remote fro... | 09/11/1984 |
| 4363975 | Direct current power supply A direct current power supply for receiving power input from a high voltage transmission line and providing direct current power to an electrical load operated at or near the potential of the transmission line and remote from electrical ground is disclose... | 12/14/1982 |
| 4234782 | Space heating using off-peak electric heat storage An off-peak, electric, central air heating system for buildings incorporating a heat storage material that is used to store heat generated electrically during off-peak electrical power periods and to deliver heat on demand. The heat storage material is an... | 11/18/1980 |
| 4227038 | Vibration isolator connector This invention is directed to a vibration isolator connector which is useful in providing an electrical connection between a fixed apparatus and a suspended slender liner body which is subject to vertical vibration. The vibration isolator connector compri... | 10/07/1980 |
| 3960494 | Colorimetric odorant level test in natural, synthetic and L.P. gas and the like Measuring of mercaptan-based odorants present in natural, synthetic, L. P. gases and the like. Conventionally, an operator smells the gas or uses apparatus which gives uncertain results. Alternatively, expensive laboratory equipment can be used, but this ... | 06/01/1976 |