Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 8044364 | Dosimetry device for charged particle radiation A dosimetry device for charged particle radiation that can be exclusive of cables and connectors between substrates is provided. A plurality of first electrodes are formed on one surface of a printed circuit board, a second electrode substrate having a second electr... | 10/25/2011 |
| 7302289 | Readable probe array for use A disposable high density optically readable polydeoxynucleotide array with integral fluorescence excitation and fluorescence emission channels is described. The compact array size allows integration into several types of interventional devices such as catheters, gu... | 11/27/2007 |
| 7180078 | Integrated planar ion traps An apparatus for an ion trap includes an electrically conductive substrate having top and bottom surfaces and having vias that cross from the top surface to the bottom surface. The apparatus includes a pair of planar first electrodes supported over said top surface ... | 02/20/2007 |
| 6489617 | Quality assurance flood source and method of making Disclosed is a is an improved flood source, and method of making the same, which emits an evenly distributed flow of energy from a gamma emitting radionuclide dispersed throughout the volume of the flood source. The flood source is formed by filling a bot... | 12/03/2002 |
| 6458295 | Phosphors, and radiation detectors and X-ray CT unit made by using the same A novel phosphor represented by the general formula (Gd1-x Cex)3 Al5-y Gay O12 (wherein x and y are values falling in the ranges of 0.0005ࣘxࣘ0.02, and 0 | 10/01/2002 |
| 5703370 | Method and apparatus for measuring angular differential dose of ionizing radiation A sensor from a carbon fiber, self-reading electrometer type of dosimeter made with a radically modified ionization chamber in order to determine the angular differential dose of ionizing radiation. The chamber is flat and its size is increased so that i... | 12/30/1997 |
| 5572027 | Integrated dosimeter for simultaneous passive and active dosimetry A radiation monitoring system and method characterized by the use of paired active and passive radiation detectors to monitor exposure to a radiation field. The active detector provides an output representative of radiation exposure on a real time basis w... | 11/05/1996 |
| 5070415 | Image reading apparatus having a low friction member between the conveying roller and the transparent plate An apparatus for reading an image of a sheet has conveying apparatus for conveying the sheet, a transparent member contacting a surface of the sheet conveyed by the conveying apparatus, and a photoelectric conversion element disposed on the transparent me... | 12/03/1991 |
| 5003176 | Ionization chamber An ionization chamber can stably measure a weak ionizing radiation with high sensitivity. The ionization chamber comprises an electrically conductive charge collecting electrode having a magnetic substance or a permanent magnet; an electromagnet for posit... | 03/26/1991 |
| 4289966 | Radiation energy detector and analyzer A radiation detector array and a method for measuring the spectral content of radiation. The radiation sensor or detector is an array or stack of thin solid-electrolyte batteries. The batteries, arranged in a stack, may be composed of independent battery ... | 09/15/1981 |
| 4281250 | Radiation dose rate meter A combined dose rate meter and charger unit therefor which does not require he use of batteries but on the other hand produces a charging potential by means of a piezoelectric cylinder which is struck by a manually triggered hammer mechanism. A tubular typ... | 07/28/1981 |
| 4224522 | Dosimeter charging and/or reading apparatus A device is disclosed for charging and/or reading a capacitor associated with an electrometer incorporated in a radiation dosimeter for the purpose of initializing or "zeroing", the dosimeter at the commencement of a radiation measurement cycle or reading... | 09/23/1980 |
| 4207471 | Radiation dosimeter charger and method A charger for ion chamber radiation dosimeters and a method of charging such dosimeters in which a dosimeter to be charged is received in a socket having electrical terminals for applying to the dosimeter an electrical charging potential developed by an e... | 06/10/1980 |
| 4088949 | Batteryless ohmmeter An ohmmeter and circuit therefor which does not require an internal battery or a continuing coupling to an external voltage source during normal use, with the necessary operating electrical power supplied through a high capacity capacitor which, after ini... | 05/09/1978 |
| 4019058 | Charge transport tactical dosimeter A quartz fiber electroscope shunted by a variable capacitor is periodically coupled to a radiation detection capacitor formed of material of a relatively large atomic number, e.g. aluminum, completely surrounded by a material of lesser atomic number, e.g.... | 04/19/1977 |
| 3993950 | Carbon fiber electrometer for dosimeter An electrometer for conventional pocket radiation dosimeters is disclosed in which the moving element of the electrometer is a carbon fiber. The fiber is spun from polyacrylonitrile homopolymer yarn and has a diameter of approximately 7 microns before car... | 11/23/1976 |
