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 |
| D597754 | Footrest | 08/11/2009 |
| 7461807 | Portable winding and reeling apparatus An improved winding apparatus for winding hoses and similar hose-shaped items such as those used in the firefighting industry. The apparatus includes a framework, a two piece retainer device in connection with the frame, and a retainer including first and second arc... | 12/09/2008 |
| 7077360 | Passenger sitting/sleeping arrangement In accordance with the present invention, there is provided a passenger accommodation arrangement for aircraft which provides both a highly efficient use of available aircraft space and a high level of comfort for passengers. In particular, the novel arrangement all... | 07/18/2006 |
| 5314316 | Scroll apparatus with reduced inlet pressure drop A scroll type fluid machinery which is provided with: a first scroll and a second scroll which moves with respect to the first scroll, where the base of the first scroll is provided with suction bores perforating through the base from the rear surface the... | 05/24/1994 |
| 4927036 | Container with tamper indicator using piped light A tamper evident device is disclosed herein comprising in its most basic form a light guide with finished ends; one of which serves to collect light, the other to emit said light to serve as a light emitting indicator. The invention is attached to closure... | 05/22/1990 |
| 4800396 | Compensation method and device for ink droplet deviation of an ink jet A charge to deflect ink jet printer employs a correction signal to ink droplets to afford more accurate placement on a medium. Assessing the deviation of charged ink droplets from intended and actual impact locations, a control unit then determines an adj... | 01/24/1989 |
| 4592763 | Method and apparatus for ramped pulsed burst powering of electrostatic precipitators In order to mitigate the problem of back-corona discharge in electrostatic precipitators, method and apparatus are provided for energizing the precipitator electrodes with repeated bursts of high voltage electrical pulses, superimposed upon a direct curre... | 06/03/1986 |
| 4581674 | Thermal fuse device for protecting electrical fixtures A protection device for interrupting power to a load connected to a pair of terminals when the temperature of a terminal exceeds a predetermined threshold comprises an alloy having a eutectic at the predetermined threshold and a neon gas-filled glow tube ... | 04/08/1986 |
| 4565248 | Method for producing water soluble resols and use therefor The effluent stream from a process for producing phenolic compounds is reacted with an aldehyde in the presence of a base to form a water soluble resol which is useful in enhanced oil recovery.... | 01/21/1986 |
| 4547726 | Means and method for measuring power system frequency Samples from a first and second cycle of a system signal are used to generate discrete Fourier transforms for the respective first and second cycle. Multiplication of the discrete Fourier transform of the second cycle by the complex conjugate of the discr... | 10/15/1985 |
| 4547826 | Generalized real-time thermal model A generalized real-time thermal model of an induction motor produces values indicative of the transient and steady state temperature condition of the motor. Each of these values is compared with respective predetermined limits and power to the motor is re... | 10/15/1985 |
| 4534061 | Deterministic multi-access method for a decentralized mobile radio system A mobile radio system uses a predetermined number of control channels over which a hand-shake routine is performed to determine called station availability, before one of a limited number of talk channels (local and repeater) is assigned for communication... | 08/06/1985 |
| 4525763 | Apparatus and method to protect motors and to protect motor life An apparatus for predicting the remaining useful life of a motor uses the temperature and past history of the motor to determine the amount of insulation degradation for its prediction. The remaining useful life projection is provided at a display and may... | 06/25/1985 |
| 4517670 | Preemptive bid communication system In a bus communication system, a unidirectional transmit bus is coupled to a unidirectional receive bus such that information packets leaving the transmit bus are placed on the receive bus. A plurality of bus interface units (BIUs) are coupled in series a... | 05/14/1985 |
| 4515205 | Method for fluidized particle tray heat exchange A heat exchanger system exhibits an improved coefficient of heat transfer over a conventional convection heat exchanger while maintaining the beneficial high temperature driving force of conventional convection heat exchanger. A plurality of heat extracti... | 05/07/1985 |
| 4510599 | Prioritized unidirectional distributed bus accessing system A plurality of bus interface units (BIUs), capable of placing information packets on a unidirectional transmit bus, are coupled to the transmit bus at locations spaced therealong. Each BIU comprises a transmit bus input port and a transmit bus output port... | 04/09/1985 |
| 4474231 | Means for increasing the critical heat flux of an immersed surface Structured boiling surfaces for increasing the critical heat flux of immersed surfaces are disclosed. The structures comprise holes or cavities in the boiling surface which constrain vapor jets to be less than the natural spacing thereof, which satisfy th... | 10/02/1984 |
| 4470711 | Electrical device termination high temperature indicator Temperature indicating apparatus for sensing overheating at a pair of terminals on an electrical power line comprises a pair of thermocouples, each thermally coupled to and electrically isolated from a different one of the terminals, and a light emitting ... | 09/11/1984 |
| 4466253 | Flow control at flash tank of open cycle vapor compression heat pumps An arrangement of controls for a vapor compression open cycle industrial process heat pump permits the level of liquid and fluid pressure in a flash tank to be simultaneously and independently monitored and regulated to assure efficient operation of the s... | 08/21/1984 |
| 4462109 | Receiver for phase-shift modulated carrier signals A receiver for recovering digital data from a phase-shift modulated carrier in a data communications system, wherein the length of the message preamble is insufficient to permit synchronous detection, divides the received signal into two channels. The cha... | 07/24/1984 |
| 4442135 | Method for coating with an atomizable material Material comprising particulate matter is atomized and coated on a surface of an object by delivering the material to a surface of a spinning atomizer from a non-rotating delivery means preferably situated within the volume defined by the atomizer. The ma... | 04/10/1984 |
