Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5852559 | Power application circuits utilizing bidirectional insulated gate bipolar transistor A matrix converter utilizes a bidirectional lateral insulated gate bipolar transistor (IGBT) including two gate electrodes. The IGBT can conduct in two directions. The matrix converter preferably is a three phase matrix converter including nine bidirectio... | 12/22/1998 |
| 5845149 | Industrial controller with I/O mapping table for linking software addresses to physical network addresses An industrial controller having a number of addressable I/O modules, employs an I/O map table linking software addresses used for developing the control program to actual physical addresses of the I/O modules on a network. By employing software addresses ... | 12/01/1998 |
| 5844795 | Diagnostic aid for industrial controller using multi-tasking architecture A task executed on a multi-tasking industrial controller is employed to monitor data exchanged between a control program (executed as a second task on the industrial controller) and the controlled process. The monitoring task, which may be invoked on a pe... | 12/01/1998 |
| 5844794 | Electronic data communications system having data consumer defining data transmission structure Multiple processing units connected along a communication link to form an industrial controller may arrange for efficient block transfer of data by isochronous methods by forwarding to a data producer a connection message including the desired data struct... | 12/01/1998 |
| 5844186 | Motor contractor with mechanical lock-out A contactor for use in controlling electrical motors may include a mechanical stop engaging the armature of the contactor and having an eyebar receiving one or more shackles of padlocks to prevent closure of the contactor contacts despite the application ... | 12/01/1998 |
| 5842039 | Most recent first dynamic protocol detection for use with a programmable controller A method to be used with a programmable controller that can communicate with peripheral devices in two protocols, the method for automatically switching controller communication between the two protocols when the protocol used by a peripheral device is di... | 11/24/1998 |
| 5835781 | Break-away key for electronic circuitry A structural key is checked under program control to control the mode of operation for a processor-based electronic circuit board. A break-away key portion of the circuit board is connected to the main portion along a boundary of frangible links with circ... | 11/10/1998 |
| 5835364 | Harmonic eliminating PWM converter A PWM based converter including a Y-Ɗ, Y--Y transformer (or a Ɗ--Ɗ, Ɗ-Y transformer) wherein the Y-Ɗ portion of the transformer phase shifts input voltage by 30° with respect to the Y--Y portion of the transformer and thereby eliminates many low ord... | 11/10/1998 |
| 5835356 | Power substrate module A power substrate module having a multilayer circuit board or laminated circuit board for use in a motor controller is described. The power substrate module includes pair of switching devices coupled across a direct current bus for converting direct curre... | 11/10/1998 |
| 5834723 | Apparatus for retaining a movable contact in a circuit interrupter An apparatus for retaining a movable contact in a circuit interrupter includes a movable element that is displaced by gas pressure within the interrupter housing resulting from arcs generated during initial displacement of the movable element. The movable... | 11/10/1998 |
| 5828983 | Method and apparatus for processing a sampled waveform A method and apparatus are provided for approximation of integral and RMS values for waveforms of uncertain or unknown period. The technique employed processes values of the waveform sampled at fixed sampling intervals, monitors the actual period of the w... | 10/27/1998 |
| 5819097 | Industrial controller compiler with expandable instruction set A compiler for an industrial controller uses a user modifiable instruction table to contain code fragments necessary to compile particular instructions. During compilation, the instructions are replaced with the code fragments. Thus new instructions recog... | 10/06/1998 |
| 5818711 | Method for visually determining the status of program edits in an on-line programming environment A method for visually displaying the status of edits utilizes a plurality of visual indicia proximal the portions of edited program segments. Program segments which have not been edited and are currently part of the executable program in the programmable ... | 10/06/1998 |
| 5816867 | Curved wire spring clamp with optimized bending stress distribution A curved wire spring clamp which distributes bending stresses linearly based on the distance from the point of load application while maintaining torsional integrity. Bending stresses are distributed by providing apertures which change the effective width... | 10/06/1998 |
| 5814967 | Apparatus to reduce no load current at low frequencies A system for accurately determining a torque current iqe for use in field oriented control of an induction motor at low rotor frequencies (e.g., about half of the motor rated frequency) which provides an ideal no load current and still enables ... | 09/29/1998 |
| 5812133 | Industrial controller with display of rung execution An industrial controller executing a graphical language employs a comparator circuit for monitoring the address locations of memory used to store the control program and its data. A cursor positioned on a graphics representation of the program is used to ... | 09/22/1998 |
| 5811949 | Turn-on delay compensator for motor control A method and apparatus for essentially eliminating turn-on delay distortions in terminal voltages and currents in a three phase motor control system wherein a compensator provides correction voltages which are added to command voltages as a function of fe... | 09/22/1998 |
| 5793064 | Bidirectional lateral insulated gate bipolar transistor A bidirectional lateral insulated gate bipolar transistor (IGBT) includes two gate electrodes. The IGBT can conduct current in two directions. The IGBT relies on a RESURF operation to provide high voltage blocking in both directions. The IGBT is symmetric... | 08/11/1998 |
