In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 4578115 | Aluminum and cobalt coated thermal spray powder A thermal spray composite is disclosed, comprised of a base constituent formed from at least one of the base metals nickel, iron and cobalt, and at least one of the modifying elements chromium and aluminum, plus individual constituents aluminum, cobalt an... | 03/25/1986 |
| 4506136 | Plasma spray gun having a gas vortex producing nozzle A plasma flame spray gun suitable for being constructed physically smaller than comparable power prior art plasma flame spray guns. The gun includes a nozzle having a tapering portion on the inlet side thereof. A cathode with a flat tip is positioned to a... | 03/19/1985 |
| 4445021 | Heavy duty plasma spray gun A heavy duty plasma spray gun for extended industrial service is disclosed. The gun includes a gas distribution member made of a material having a coefficient of expansion different from that of the parts surrounding it. The gas distribution member is for... | 04/24/1984 |
| 4430546 | Plasma spray gun nozzle A plasma spray gun nozzle with a thin annular coolant passage having extended life. The thin annular passage is located adjacent a thin nozzle wall which confines the arc formed in the nozzle. The dimensions of the thin annular passage and the wall thickn... | 02/07/1984 |
| 4421799 | Aluminum clad refractory oxide flame spraying powder A flame spray powder comprising particles with a central core of a material selected from the group consisting of zirconium oxide, magnesium oxide, hafnium oxide, cerium oxide, yttrium oxide and combinations thereof. The core then has discrete aluminum pa... | 12/20/1983 |
| 4405853 | Plasma spray gun with cooling fin nozzle and deionizer A plasma spray gun nozzle with fins for cooling. The fins are designed in the region radially outward of the point where the arc strikes the nozzle to have a base width and a slot width and slot depth having advantageous dimensions. Coolant is forced thro... | 09/20/1983 |
| 4388373 | Coating plastic substrates with minerals A flame sprayable powder composition suitable for coating a plastic substrate comprising by weight (a) about 90 to 98% of a flame sprayable mineral powder, (b) about 1 to 5% of a nylon powder, and (c) about 1 to 5% of an epoxy resin powder. The coated pla... | 06/14/1983 |
| 4370367 | Self-bonding flame spray wire for producing a readily grindable coating A self-bonding flame spray wire capable of forming a readily grindable coating formed of a sheath of aluminum and a compacted powder core containing a major portion of nickel and stainless steel and a minor portion of aluminum and metal oxide. The core ma... | 01/25/1983 |
| 4358053 | Flame spraying device with rocket acceleration A flame spraying device including a rocket accelerator wherein a low velocity flame is produced into which a coating material is introduced. At least one rocket accelerator producing a high velocity stream of combustion product gases is positioned relativ... | 11/09/1982 |
| 4276353 | Self-bonding flame spray wire for producing a readily grindable coating A self-bonding flame spray wire capable of forming a readily grindable coating formed of a sheath of aluminum and a compacted powder core containing a major portion of nickel and stainless steel and a minor portion of aluminum and metal oxide. The core ma... | 06/30/1981 |
| 4181525 | Self-bonding flame spray powders for producing readily machinable coatings A flame spray powder comprising particles having a core of nickel, iron, copper, cobalt or alloys thereof coated with a binder containing discrete particles of aluminum and substantially pure nickel. The core material should be present in amounts of 70-98... | 01/01/1980 |
| 4122327 | Automatic plasma flame spraying process and apparatus An improvement in a plasma flame spraying apparatus, particularly one in which at least two gases form the plasma, which improvement comprises means associated with the plasma gas inlet, said means being time related to an increase in the current through ... | 10/24/1978 |
| 4121082 | Method and apparatus for shielding the effluent from plasma spray gun assemblies Method and apparatus for plasma flame-spraying coating material onto a substrate by means of passing a plasma-forming gas through a nozzle electrode, passing an arc-forming current between said nozzle electrode and a rear electrode to form a plasma efflue... | 10/17/1978 |
| 4076883 | Flame-sprayable flexible wires A flame-sprayable flexible wire comprising a mineral powder having a particle size of less than about 140 mesh and about 5 to 70% by volume of the wire of a polyurethane or epoxy polymer. Advantageously the wire is produced by forming the requisite mixtur... | 02/28/1978 |
| 4024369 | Dual size wire arc spray gun An arc spray gun in which the ends of two metal wires, respectively connected to opposite terminals of a DC power source, are fed to an intersection point to strike and maintain an electric arc, melting the wires. A gas jet directed at the intersection po... | 05/17/1977 |
| 4019875 | Aluminum-coated nickel or cobalt core flame spray materials A flame spray material in the form of a composite comprising (1) as a first component an alloy containing at least about 40% of its weight of at least one of nickel and cobalt, and about 1 to 6% by weight of boron, and (2) aluminum powder as a second comp... | 04/26/1977 |
| 3991240 | Composite iron molybdenum boron flame spray powder A composite flame spray powder comprising powder particles having as components, cast iron, molybdenum (as such and/or as ferromolybdenum), and boron (as such and/or as ferroboron), unalloyed together. The composite particles are preferably in a form havi... | 11/09/1976 |
| 3988566 | Automatic plasma flame spraying process and apparatus A plasma flame-spraying apparatus, having a source of primary gas and a source of a secondary plasma gas, is provided with means for insuring that when the secondary gas in passed through the electric arc established in the flame-spraying apparatus, which... | 10/26/1976 |
| 3976332 | Powder feed device for flame spray guns A device for feeding metal powders suspended in a conveying gas uniformly and controllably to a point of utilization such as a flame spray gun comprising an enclosed hopper which contains the powder in particulate loose and by and large unfluidized form a... | 08/24/1976 |
| 3958097 | Plasma flame-spraying process employing supersonic gaseous streams An improvement in a process for high velocity plasma flame-spraying of a powder onto a workpiece wherein an unlit plasma gas is passed through the nozzle of a plasma flame-spraying gun at a high velocity of at least 90 meters per second and an electric ar... | 05/18/1976 |
| 3949266 | Circuit means for automatically establishing an arc in a plasma flame spraying gun An improvement in a plasma flame spraying apparatus, particularly one in which at least two gases form the plasma, which improvement comprises means associated with the plasma gas inlet, said means being time related to an increase in the current through ... | 04/06/1976 |
| 3933040 | Flowmeter A flowmeter for measuring the quantitative flow of fluids such as gases passing therethrough is disclosed and includes a housing forming at its upper end a centrally located tubular guide. The housing has a centrally located chamber which terminates at it... | 01/20/1976 |