Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 7336692 | Induction furnace for melting semi-conductor materials An induction furnace includes an induction coil, an electrically non-conductive crucible having an inner diameter disposed within the induction coil, and an electrically conductive member disposed below the crucible and having an outer diameter which is further from... | 02/26/2008 |
| 7110430 | Induction furnace for melting semi-conductor materials An induction furnace includes an induction coil, an electrically non-conductive crucible having an inner diameter disposed within the induction coil, and an electrically conductive member disposed below the crucible and having an outer diameter which is further from... | 09/19/2006 |
| 7049540 | Process and apparatus for cutting or welding a workpiece A metal jet cutting system, which includes a jetting heat, a heater and a power source, is used for modifying a workpiece. The jetting head includes a crucible and an inlet for receiving a feed stock of a conductive material. The heater melts the conductive material... | 05/23/2006 |
| 6163019 | Resonant frequency induction furnace system using capacitive voltage division An induction furnace having a voltage source series inverter, a load circuit having a combination of an induction coil and a resonating capacitor bank, and control circuitry to phase lock the inverter frequency to the natural resonant frequency of the loa... | 12/19/2000 |
| 6148019 | Modular high power induction heating and melting system A system for melting metal and holding molten metal, comprises a rectifier unit receiving AC electric power and outputting DC electric power, a plurality of inverter units, each receiving the DC electric power output by the rectifier unit and outputting A... | 11/14/2000 |
| 5889812 | Process for the operation of coreless induction melting furnaces or holding furnances and an electrical switching unit suitable for the same In a process for the operation of coreless induction melting and/or holding furnaces--in which there results in the melting operation at a relatively high induction frequency (as compared to the mains frequency) a slight stirring motion in the melt, but a... | 03/30/1999 |
| 5666377 | Multiple furnace controller A multi-furnace control system selectively delivers preselected percentages of available power to furnaces of the system, preferably designated as either a melt furnace or a hold furnace. The power supply delivers power to both furnaces. A capacitor stati... | 09/09/1997 |
| 5331676 | Calibration fixture for induction furnace Nuclear fuel rod tubes of zirconium alloy are heat treated in an induction furnace to produce a protective oxide coating two to fifteen microns in thickness. The furnace is only slightly larger than the tubes and receives the endmost eight inches of the t... | 07/19/1994 |
| 4446562 | Method and apparatus for measuring crucible level of molten metal Improved and simplified measurement of the level of molten metal in a crucible heated by an induction coil utilizes a variable frequency power supply for the induction coil. Power supply frequency is changed to maintain the power provided to the coil subs... | 05/01/1984 |
| 4419755 | Method for measuring the extent of slag deposit buildup in a channel induction furnace Disclosed is a method for measuring the extent of slag deposit buildup in the channel of a channel induction furnace during operation. The method comprises measuring an initial temperature rise factor in the furnace at a time when no slag deposits are pre... | 12/06/1983 |
| 4377347 | Method for measuring temperature of molten metal received in vessel A method for measuring the temperature of molten metal received in a vessel, which includes covering the tip portion of a probe which includes a thermocouple housed in an alumina protecting tube, from inside to outside with a ceramic fiber and a quartz gl... | 03/22/1983 |
