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5298833 |
Black electrophoretic particles for an electrophoretic image display
The present invention are dielectric black particles for use in electrophoretic images displays, electrostatic toner or the like, and the corresponding method of manufacturing the same. The present...
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H001177 |
Radioactively biased optical limiter
A radioactively biased optical power limiter device is described which comprises first and second lenses disposed along an optical axis with a common focal plane therebetween, the first lens...
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5118951 |
Radioluminescent light sources
A radioluminescent source is provided by a radioactive element entrapped in an amorphous semiconductor. A preferred light source comprises a beta-emitting radioactive element, such as tritium,...
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5001402 |
Illuminated aerial marker
An illuminated aerial marker for a high voltage transmission line using a spherical colored opaque capacitor with gas filled lamps electrically connected, exterior to the capacitor with one...
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4935632 |
Luminescent concentrator light source
A light assembly comprises a self-luminescent light source, a wave guide and output optics. The self-luminescent light source takes the form of a luminescent concentrator which is activated by beta...
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4871909 |
Optical switch device employing fluorescent substance in combination with a radioactive element as a light source
This invention relates to an optical switch device including a light spot composed of a fluorescent substance in combination with a radioactive element. A switching signal is obtained from an...
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4855879 |
High-luminance radioluminescent lamp
In a preferred embodiment, a radioluminescent lamp having a glass face plate with a plurality of parallel planar light guides, each preferably having a transparent glass, sapphire or quartz base...
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4839567 |
Illuminated aerial marker
An illuminated aerial marker for a high voltage transmission line using a spherical colored opaque capacitor with neon lamps in series or series/parallel or parallel, exterior to the capacitor with...
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4827176 |
Metal vapor discharge lamp with radioactively impregnated ceramic material body
A metal vapor discharge lamp. The metal vapor discharge lamp includes an enclosed discharge tube having a pair of main electrodes mounted at spaced apart locations therein, the discharge tube...
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4777399 |
High pressure metal vapor discharge lamp
A high pressure metal vapor discharge lamp comprising a discharge tube with a pair of spaced main electrodes; a filling sealed in the discharge tube comprising a light emitting metal and a starting...
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4761583 |
Glow discharge starter containing radioactive alloy
A glow discharge starter having an hermetically sealed envelope of vitreous material, a seal located at one end thereof and containing an ionizable medium. A pair of electrical conductors extend...
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4598229 |
Luminous tube color generator
A luminous tube is provided with three color producing inner tubes and is mounted within a clear outer tube. The luminous gas filling the outer tube also fills the open-ended inner tubes. Each of...
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4568856 |
High pressure metal vapor discharge lamp
A high pressure metal vapor discharge lamp including an arc tube having at least a main electrode at each end thereof, a fill sealed in the arc tube, including mercury, metal halide and starting...
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4546417 |
Self-luminous light source
A self-luminous light source is disclosed having a light-permeable shell, a body disposed within the shell, defining a space between the shell and body, a member connecting the shell and body,...
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4475055 |
Spark gap device for precise switching
A spark gap device for precise switching of an energy storage capacitor into an exploding bridge wire load is disclosed. Niobium electrodes having a melting point of 2,415 degrees centrigrade are...
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4383253 |
Ionization smoke detector
The detector comprises a first electrode defined by a bolt mounted on an annular insulator which in turn is mounted on a printed circuit board and a second electrode defined by a cup shaped member...
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4247800 |
Radioactive starting aids for electrodeless light sources
Radioactive materials are used to assist in starting a discharge in an electrodeless light source. The radioactive emissions predispose on the inner surface of the lamp envelope loosely bound...
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4244783 |
Monitoring of tritium
The fluid from a breeder nuclear reactor, which may be the sodium cooling fluid or the helium reactor-cover-gas, or the helium coolant of a gas-cooled reactor passes over the portion of the...
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4245174 |
Dual ionization chamber
In an electronic smoke sensing and alarm device, a dual ionization chamber arrangement comprises a single source of radioactive material and first and second chambers separated by a common...
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4243981 |
Ionization fire-signal device
An ionization fire-signal device is provided which is compact in construction so that it has a small axial height. The housing for the device includes an axial extending outer wall and a...
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4238788 |
System for detecting a combustion process
An ionization type smoke detector includes an element for giving a visible indication of operativeness of the system together with a component responsive thereto for representing impending failure...
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4223250 |
Protective coatings for light sources
A metallic coating is disposed on the inner surface of a lamp having an envelope made of a light transmitting substance enclosing a fill material which emits light upon breakdown and excitation by...
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4194191 |
Smoke simulating test apparatus for smoke detectors
A smoke detector of the ionization type is provided with a movable test target or probe for intercepting alpha radiation within the measuring chamber when moved to a particular position. As a...
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4189644 |
Smoke detector ionization chamber
An ionization chamber of the type used in an ionization smoke detector is made adjustable. The chamber has two electrodes and one radioactive source for ionizing the electrode gap. One of the...
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4177378 |
Long-lived reference cell simulating the α scintillation of radon-222
A reference cell simulating the light amplitude spectrum of an alpha scintillation cell containing radon 222 . The cell includes a gas-tight container having a transparent window. The interior of...
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4167687 |
Smoke detector apparatus and ionization chamber therefor
A smoke detection apparatus is disclosed having a highly efficient ionization chamber. The ionization chamber is primarily formed by a wire mesh collector that readily admits products of combustion...
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4123682 |
Cold cathode gas-discharge tube
A gas-discharge tube especially adapted for use as an over-voltage arrestor containing a radioactive material for pre-ionizing the gas filling is provided in which a radioactive material is applied...
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4093886 |
Aerosol detection device
Fire alarm system utilizing an aerosol detector of the type formed by outer and inner interconnected ion chambers with a single particle source located within the inner chamber. The particle source...
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4051376 |
Ionization detectors
A novel form of ionization detector, particularly one operating in the electron capture mode, is described. The detector includes iron-55 as a source of electrons to cause ionization. The detector...
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4035788 |
Incipient fire detector
The improved incipient fire detector employs an ionization particulate detector in combination with a particulate collector to monitor selectively small particulates in the atmosphere which are...
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4012729 |
Multi-element ionization chamber
A fire alarm system utilizes an ionization type aerosol detector having first and second intercommunicating and electrically in series ionization regions or chambers irradiated by a particle...
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3980928 |
Fire detectors
A fire detector of the type including a smoke chamber and a grid supported in the chamber on an insulating element. In order to prevent the flow of leakage currents from the grid to the body of the...
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3958096 |
Welding arc gap ionization device
An alpha emitting isotope is positioned near the tip of a TIG welding electrode so that the alpha radiation can provide an ionized path between the electrode and the workpiece.
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3935492 |
Ionization smoke detector
An ionization smoke detector having two ionization chambers with one of said chambers having an electrode at least partially surrounded by a conductive mesh constituting an intermediate electrode...
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3928781 |
Gaseous discharge display panel including pilot electrodes and radioactive wire
In a plasma display panel consisting of gas enclosed between adjacent insulating members, a light source is used to supply charged particles in the gas to permit firing of the gas when coordinate...
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3913082 |
Ionization aerosol detector
A completely self-contained aerosol detection device and method including a highly sensitive focused beam ionization chamber. The ionization chamber employs a radiation source located between the...
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3902090 |
Short-arc gas discharge lamp
A short-arc gas discharge lamp having a discharge vessel provided with a gas filling in which the discharge takes place, and with two electrodes of a high melting point metal facing each other. The...
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3900767 |
Surge arrestor
A surge arrestor comprising a flat ceramic substrate having a centrally disposed notch formed in the upper surface thereof. First and second electrodes are provided on the upper surface of the...
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3891883 |
Discharge display panel including a substrate supporting plural cathodes and recessed anodes
In a glow discharge readout, cathodes are arranged on a glass substrate in electrical isolation from a plurality of anodes also on the substrate. Contact pins sealably imbedded in the substrate...
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3883765 |
HIGH-PERFORMANCE EMITTER FOR THERMOELECTRONIC DIODES
A high-performance emitter for thermoelectronic diodes, and a method for manufacturing said emitter. The emitter comprises a fissile fuel member 2 coated with at least one refractory metal emitting...
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3870888 |
ELECTRON CAPTURE DETECTORS
The invention relates to an electron capture detector having an ionisation chamber of large volume and into which a sample flows at a high flow rate, the terms "large" and "high" being relative to...
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3858073 |
PLANE MULTI-DIGIT TYPE ELECTRIC DISCHARGE DISPLAY DEVICES
In a plane multi-digit type electric discharge device of the class comprising an insulator substrate, a plurality of pattern display units arranged in side-by-side relationship on the insulator...
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3858125 |
RECEIVER PROTECTION METHOD AND APPARATUS
A multipactor receiver protection stage is provided with a soft beta emitter, such as a tritium doped material, for decreasing the turn-on time of the stage by providing free electrons in the gap...
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3849685 |
IONIZATION CHAMBER WITH RECESSED RADIOACTIVE BODY
An improved chamber assembly for an ionization smoke detector. The chamber assembly includes a cup shaped electrode having attached therein a radioactive source to provide the ionization in the...
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3833815 |
KRYPTON SOURCE
A radiation source for use in an arming system for airborne weapons comprng a stainless steel sphere filled with krypton-85 (Kr 85 ) radioactive gas at high pressure and having gold plated internal...
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3832552 |
DUAL CHAMBER IONIZATION SMOKE DETECTOR
An improved chamber assembly for a dual chamber ionization smoke detector. A fluorocarbon plastic insulation member provides a non wettable insulating dividing wall between the two chambers.
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3824422 |
SMOKE DETECTORS
A smoke detector for use in detecting the early outbreak of a fire and including a housing defining a smoke chamber, a housing defining a reference chamber, a grid in each of the chambers and an...
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3811060 |
GASEOUS ELECTRODE SEGMENT TYPE DISPLAY DEVICE
This invention relates to display device. The display device comprises a sealed body comprising a base plate of an electrically insulating material, and at least one indication region formed on...
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3792308 |
ELECTROPHORETIC DISPLAY DEVICE OF THE LUMINESCENT TYPE
An electrophoretic display and/or recording device of the luminescent type in which a luminescent electrophoretic suspension layer including a dispersion of at least one electrophoretic material in...
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3786296 |
EVACUATED ELCTRON DISCHARGE TUBES
An ion getter pump for providing a vacuum in a high power microwave discharge tube consists of a body of radio-active material which is arranged to act as the power source for the pump. The pump...
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