51
David J Matthews: System for periodically reading all memory locations to detect errors. The Perkin Elmer Corporation, E T Grimes, J D Crane, July 30, 1985: US04532628 (26 worldwide citation)

A memory checking circuit for periodically reading the data from all locations therein. The circuit includes logic to correct and restore data from locations where an error has occurred. The circuit quickly identifies all memory locations present during search mode at a fast rate and reads all prese ...


52
Wayne E Kohman, Joseph E Maleri: Load-lock vacuum chamber. The Perkin Elmer Corporation, Giarratana, E T Grimes, T P Murphy, July 27, 1982: US04341582 (26 worldwide citation)

An apparatus for etching one wafer while simultaneously pretreating or stripping another wafer. A module comprises a wafer etching chamber disposed within a larger chamber. The wafer etching chamber is adapted to etch a first wafer during the time that a second wafer is being pretreated in the large ...


53
David R Shafer: Catadioptric telescopes. The Perkin Elmer Corporation, Giarratana, E T Grimes, T P Murphy, August 3, 1982: US04342503 (24 worldwide citation)

The first element comprises a relatively thin transmissive shell concave toward the front. The second element comprises a mirror concave toward the front. The front surface of the shell may be spherical, and the rear surface aspheric, or vice versa. The central portion of the first element on either ...


54
James E Hodge: Multi-level priority micro-interrupt controller. Concurrent Computer Corporation, E T Grimes, F L Masselle, January 13, 1987: US04636944 (23 worldwide citation)

A multi-level priority micro-interrupt controller for a micro-program controlled computer handles a plurality of interrupt signals at a plurality of levels of priority, wherein only one interrupt signal for each level of priority may be active at any moment. When an interrupt occurs which has a high ...


55
David G Welkie, Robert L Gerlach: Vacuum-compatible air-cooled plasma device. The Perkin Elmer Corporation, H S Ingham, F L Masselle, E T Grimes, April 21, 1987: US04659899 (23 worldwide citation)

A plasma generating device, and in particular a duoplasmatron ion gun, is disclosed that is air cooled, high vacuum compatible and hence very clean with a stable ion current output. The device is mounted to a standard type flange held at ground potential without the necessity of subsequent high volt ...


56
Joseph S Shriver: Memory refresh circuit with varying system transparency. The Perkin Elmer Corporation, E T Grimes, F L Masselle, November 25, 1986: US04625296 (23 worldwide citation)

A memory refresh circuit controls the refreshing of dynamic RAM included in a system wherein a control store outputs micro-code instructions to control the system operation in response to sequences specified by a sequence and interrupt logic circuit (SIL). A counter transmits certain counts of syste ...


57
Arthur J Fabel: Plasma flame spray gun method and apparatus with adjustable ratio of radial and tangential plasma gas flow. The Perkin Elmer Corporation, H S Ingham, F L Masselle, E T Grimes, June 23, 1987: US04674683 (23 worldwide citation)

A plasma gun has a hollow generally cylindrical anode nozzle member and coaxially disposed therein a cylindrical cathode member, the members co-acting to form an interior passage for plasma forming gas. At one end, within the body of the gun, the passage comprises an annular gas inlet chamber or ple ...


58
Richard T Smyth: Method and apparatus for plasma flame-spraying coating material onto a substrate. Metco, Salvatore A Giarratana, E T Grimes, F L Masselle, October 17, 1978: US04121083 (23 worldwide citation)

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 effluent, introducing coating material into the pla ...


59
Bernhard Werner Huber: Automatic sample preparation device. Bodenseewerk Perkin Elmer & Co, Giarratana, F L Masselle, E T Grimes, August 16, 1977: US04042338 (23 worldwide citation)

An automatic sample preparation device for use in flameless atomic absorption spectroscopy or the like, wherein samples to be examined for a particular element are successively mixed with graduated, metered additions of the element to be determined, which includes, in combination, controlled deliver ...


60
Anthony J Rotolico, William H Maidhof: Plasma gun apparatus and method with precision adjustment of arc voltage. The Perkin Elmer Corporation, H S Ingham, E T Grimes, May 8, 1990: US04924059 (23 worldwide citation)

A plasma gun apparatus with precision adjustment of arc voltage, includes a gun body with a bore therethrough, a nozzle anode in the bore, a cathode holder engaged in the bore with threads, and a cathode mounted on the cathode holder. A locking ring is engaged in the bore with threads for locking th ...



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