Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 8139208 | Ultrasonic detection system and method for the detection of transparent window security features in bank notes A system and method for automatically detecting the presence of a perforation, tear, or a transparent window security feature in a bank note. The system includes an optical detection device, and an ultrasonic detection device, and a conveyance device for transportin... | 03/20/2012 |
| 8134323 | Bypass and synchronous transfer arrangement for a medium voltage drive control system A medium voltage variable frequency drive having a 2-high controller configuration with a dual bus system is described. The drive control system includes at least one motor control cabinet housing a fused medium voltage bypass controller, a non-fused transfer contro... | 03/13/2012 |
| 8127243 | Uninterruptible power system (UPS) with improved manual user interface having a touch screen with main tabs separating pages, sub-menus identifying sub-pages related to certain main tabs, and links to pages or sub-pages An Uninterruptible Power System is described that is configured to operate as a buffer between a supplied power and an electrical load such that if line voltage is interrupted power to the load is maintained for a period of time. The uninterruptible power system is ... | 02/28/2012 |
| 8110946 | Uninterruptible power supply An uninterruptible power supply with an input terminal and an output terminal, a main switch connected to the input terminal, an input filter circuit connected to the main switch, a rectifier circuit connected to the input filter circuit, a main capacitor connected ... | 02/07/2012 |
| D651212 | Touch screen panel for an uninterruptible power system (UPS) | 12/27/2011 |
| 8036004 | Uninterruptible power supply with total isolation An uninterruptible power supply includes an isolation transformer having dual primary windings. The secondary winding generates an output voltage based on the magnetic field generated in one of the dual primary windings. A first primary winding is coupled to an inve... | 10/11/2011 |
| 7880343 | Drive isolation transformer controller and method A transformer controller for a drive isolation transformer is provided. The transformer may include multiple sets of primary windings as an input, and the transformer controller may include multiple branches coupled between a power source and the transformer. Each b... | 02/01/2011 |
| 7876586 | Multi-pulse rectifier for AC drive systems having separate DC bus per output phase and multiple isolation transformers An 18n-pulse rectifier for AC drive systems having a separate DC bus for each output phase is provided, where n=any positive integer. The rectifier uses three separate phase rectifiers, one for each output phase of a transformer, each comprised of 2n six-pulse diode... | 01/25/2011 |
| 7665185 | Incremental locking hinge assembly A hinge assembly containing a receiver member having a corrugated inner surface and a locking pin for being pivotally disposed within the receiver portion about an axis. The locking pin and receiver member have complementary corrugated engaging surfaces that allow t... | 02/23/2010 |
| 7635225 | Positive displacement lubrication device A positive displacement lubrication system is disclosed that includes a rotatable shaft, a bearing, and a centrifugal force generating lubrication member that is mounted on the shaft for rotation with the shaft. The centrifugal force generator is spaced from the bea... | 12/22/2009 |
| 7622823 | Uninterruptible power supply with low leakage current An uninterruptible power supply having a controllable leakage current is disclosed. The leakage current is controlled by adjusting a switching speed (i.e., dV/dt rate) of switches in the output inverter (i.e. DC-AC converter stage). Leakage current can be reduced by... | 11/24/2009 |
| 7432819 | Apparatus for continuous cooling of electrical powered equipment A fluidic cooling assembly for removing heat from electrical equipment includes operational diversity features in which multiple fluid moving devices are mounted in a single housing. The assembly may include a first fluid baffle and a second fluid baffle disposed wi... | 10/07/2008 |
| 7430132 | Medium voltage inverter system A medium or high voltage multi-inverter system is described, in which multiple inverter cells are included in a phase line to increase the voltage level supported by the system, and support higher voltage loads such as AC three-phase motors. In one configuration, fi... | 09/30/2008 |
| 7222395 | Incremental locking hinge assembly A hinge assembly containing a receiver member having a corrugated inner surface and a locking pin for being pivotally disposed within the receiver portion about an axis. The locking pin and receiver member have complementary corrugated engaging surfaces that allow t... | 05/29/2007 |
| 7142428 | Locking heatsink apparatus A heatsink is provided for cooling power components on a printed circuit board. The heatsink includes a slot so that it is placed over the power device to be cooled. An activating member may be inserted from the opposite side of the printed circuit board and fastene... | 11/28/2006 |
| 7088073 | Inverter drive system Systems and methods are provided for dynamically changing configurations of multi-inverter drive systems. By changing configurations during operation, a multi-inverter system of the present invention can provide greater than half of full output power during failure ... | 08/08/2006 |
| 7054173 | Circuit with DC filter having a link fuse serially connected between a pair of capacitors A circuit that includes a filter and a DC bus is provided that reduces the potential for failure of a second capacitor of the filter in the event a first capacitor shorts. The filter is electrically connected across the DC bus and includes serially connected capacit... | 05/30/2006 |
| 6936767 | Apparatus for continuous cooling of electrical powered equipment A fluidic cooling assembly for removing heat from electrical equipment includes operational diversity features in which multiple fluid moving devices are mounted in a single housing. The assembly may include a first fluid baffle and a second fluid baffle disposed wi... | 08/30/2005 |
| 6898093 | Power conversion circuit with clamp and soft start A power converter includes a current source providing an input current, a transformer having primary and secondary windings, a switch network coupling the current source and the primary winding, and a clamping circuit coupled to the switch network. An output bus is ... | 05/24/2005 |
| 6599658 | Battery case A battery case comprising a pair of case members joined together along a seam to form a housing. Each case member includes a pair of sidewalls adapted to define a base surface on which the case rests so as to permit a plurality of resting orientations of ... | 07/29/2003 |
| 6524743 | Battery case with electrical connector for two-dimensional movement A battery case comprising a pair of case members joined together along a seam to form a housing. Each case member includes a pair of sidewalls adapted to define a base surface on which the case rests so as to permit a plurality of resting orientations of ... | 02/25/2003 |
| 6377478 | Inverter device A method and apparatus for conducting regenerative braking for a motor load is disclosed wherein the load is driven by a plurality of power cells on each phase-line to the load, the plurality of power inverters comprising at least one single phase power i... | 04/23/2002 |
| 6317348 | UPS chassis design having an internal support structure A modular UPS unit with an internal central support structure. Each module can be removed from the structure independent of the others, permitting hot swapping of the modules. The internal support structure simplifies the manufacture of the unit, minimize... | 11/13/2001 |
| 6197444 | Battery case A battery case comprising a pair of case members joined together along a seam to form a housing. Each case member includes a pair of sidewalls adapted to define a base surface on which the case rests so as to permit a plurality of resting orientations of ... | 03/06/2001 |
| 5973465 | Automotive restart control for submersible pump A method for restarting a motor of a submersible pump after a power interruption is disclosed. The system first detects when the power is turned back on to the system. A control means then samples signals sent back from the unpowered motor and determines ... | 10/26/1999 |
