Patents by Inventor David A. Lacey
David A. Lacey has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6512923Abstract: A radio communication terminal operating under a frequency reuse plan for communicating to and from a SCT (116) located in any one of a plurality of communication zones (118) corresponding to the frequency reuse plan, includes: a processing system (412), and a radio transceiver (114) coupled thereto. The processing system is programmed to: (202) cause the radio transceiver to receive a registration request when transmitted from the SCT as the SCT enters a new communication zone, (204) track a history of the SCT's whereabouts according to each registration request received from the SCT, (206) receive a message intended for the SCT, (208) cause the radio transceiver to transmit the message to the SCT, and (210) cause the radio transceiver to wait a predetermined time to receive an acknowledgement message from the SCT indicating that the message was received.Type: GrantFiled: February 3, 1999Date of Patent: January 28, 2003Assignee: Motorola, Inc.Inventors: Anthony David Pallas, James David Lacey
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Patent number: 6408259Abstract: This invention provides an improved alert generation system and method for trend performance analysis. A multi-variate abnormal condition detector normalizes data obtained from a process and classifies the data in a multi-dimensional space defined for the variables in the process. The normalized data are classified into either a normal or abnormal class. An alert evaluator evaluates the data classified in the abnormal class and determines whether the data are a true alert or a false alert. In another embodiment, the multi-variate abnormal condition detector and alert evaluator are used in parallel with a trend performance analysis tool to validate alerts generated therefrom.Type: GrantFiled: February 1, 2000Date of Patent: June 18, 2002Assignee: General Electric CompanyInventors: Kai Frank Goebel, David Lacey Doel
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Publication number: 20020058508Abstract: A radio communication terminal operating under a frequency reuse plan for communicating to and from a SCT (116) located in any one of a plurality of communication zones (118) corresponding to the frequency reuse plan, includes: a processing system (412), and a radio transceiver (114) coupled thereto. The processing system is programmed to: (202) cause the radio transceiver to receive a registration request when transmitted from the SCT as the SCT enters a new communication zone, (204) track a history of the SCT's whereabouts according to each registration request received from the SCT, (206) receive a message intended for the SCT, (208) cause the radio transceiver to transmit the message to the SCT, and (210) cause the radio transceiver to wait a predetermined time to receive an acknowledgement message from the SCT indicating that the message was received.Type: ApplicationFiled: February 3, 1999Publication date: May 16, 2002Inventors: ANTHONY DAVID PALLAS, JAMES DAVID LACEY
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Patent number: 6216066Abstract: This invention provides a system and method for generating alerts through multi-variate assessment. A normalizer normalizes data obtained from a process. A classifier classifies the correlated data in a multi-dimensional space defined for the variables in the process. The normalized data are classified into a normal cluster indicative of normal operating conditions and at least one alert cluster each indicative of alert conditions. An alert verifier verifies correlated data classified as an alert condition. In another embodiment of this invention, a tracker is used for addressing drifting data sets that arise in the process over time which allows the adaptation of classifiers to the shifted state. In a third embodiment, the multi-variate generator is used in parallel with a trend performance analysis tool to validate alerts generated therefrom.Type: GrantFiled: July 1, 1998Date of Patent: April 10, 2001Assignee: General Electric CompanyInventors: Kai Frank Goebel, David Lacey Doel
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Patent number: 6180024Abstract: Methods, based on the Wittig-Horner reaction, are provided for the synthesis of compounds of formula (I) where m is from 5-150, X and Y are independently selected from: CN, H, OH, COCH3, CO2H, CO2H, CO2R1, where R1 is C1-12 alkyl, NCS, SCN, CF3, CH2X where X is F, Cl, Br, OH, CHF2 and formula (IB), where J for each X and Y group is independently selected from: CH2, single covalent bond, OOC, CO2, O, CH2O, OCH2, CH2CO2, CH2OOC; p=1-20; L for each X and Y group is independently selected from: O, CH2OCO, CO2, S, NH; (a) is defined by formula (IC), where rings A, B and C are independently selected from phenyl, cyclohexyl, pyridine and pyrimidine and may be independently of each other substituted with at least one of Cl or F; linking groups A and B may be selected from single bond, CO2, OOC, CH2O, OCH2, CH2CH2, C≡C; Z is selected from CN, F, Cl, NO2, R, OR, CO2R, CF3, OOCR, NCS, SCN, where R=straight chain or branched chain alkyl and may include from 1-16 carbon atoms and inclType: GrantFiled: February 26, 1999Date of Patent: January 30, 2001Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern IrelandInventors: Keith M Blackwood, Michelle Jones, David Lacey, Alan W Hall, Kenneth J Toyne, Steven Pringle
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Patent number: 6099752Abstract: Compounds of formula ##STR1## are provided which may be used in a variety of devices including liquid crystal devices, piezoelectric devices, pyroelectric devices and in optical recording media, wherein X.sub.1 and X.sub.2 are independently selected from H, CN, COCH.sub.3, CO.sub.2 CH.sub.3, m=at least 5; X.sub.3 and X.sub.4 are independently selected from formula (IA), ##STR2## wherein Y is selected from COO, OCO, O, S, CHOH, CHF, CH.sub.2 ; Q=(CH.sub.2).sub.n wherein one or more non-adjacent methylenes may be replaced by O and n=1-20; Z is selected from O, S, single covalent bond, COO, OCO; when Y is CH2 then n may also be O; formula (A) ##STR3## represents any mesogenic group; X3 and X.sub.4 are also independently selected from H, OH, OCOR.sup.1, COOH, CO.sub.2 R.sup.1 (CH.sub.2).sub.p OH, (CH.sub.2).sub.p CO.sub.2 H, --(CH.sub.2).sub.p OR.sup.1 or --(CH.sub.2).sub.p CO.sub.2 R.sup.1 and p=1-20, R.sup.1 =H or C.sub.1=16 alkyl, when R.sup.1 =C.sub.2-16 alkyl the terminal Ch.sub.Type: GrantFiled: April 29, 1998Date of Patent: August 8, 2000Assignee: The Secretary of State for Defense in Her Brittanic Majesty's Government of the United Kingdom of Great Britain and Northern IrelandInventors: Alan William Hall, David Lacey, Ian Charles Sage, Keith Moray Blackwood, Michelle Jones
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Patent number: 6060133Abstract: A compound of formula I ##STR1## wherein n=3-30; X and Y are independently chosen from C.sub.1-6 alkyl, phenyl or formula II:(CH.sub.2).sub.p O--M IIwherein p=1-20 and M is a group of formula III: ##STR2## wherein a, b and g are independently chosen from 0 and 1; G is selected from CO.sub.2, OCO and is a single bond when g=0; j=0-4; F indicates that one or more of the phenyl rings may be laterally fluorinated; Z is chosen from R, OR, CO.sub.2 R, OCOR or CN wherein R is selected from chiral C.sub.4-20 branched chain alkyl, provided that at least one of X and Y is selected from formula II and that the positions of X and Y relative to each other provide stereo-isomers.Type: GrantFiled: October 6, 1997Date of Patent: May 9, 2000Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern IrelandInventors: David Lacey, Timothy Earl Mann, Julie Ann Haley, Damien Gerard McDonnell
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Patent number: 6030668Abstract: Compounds of formula ##STR1## are provided which may be used in a variety of devices including liquid crystal devices, piezoelectric devices, pyroelectric devices and in optical recording media, where m=at least 5; and R.sub.x, R.sub.y and R.sub.z are independently from formula (IA), ##STR2## where Y is selected from COO, OCO, O, S, CHOH, CHF, CH.sub.2 ; Q=(CH.sub.2).sub.n wherein one or more non-adjacent methylenes may be replaced by O and n=1-20; Z is selected from O, S, a single covalent bond, COO, a OCO; when Y is CH.sub.2 then n may also be 0; formula (IB) is ##STR3## and represents any mesogenic group; and R.sub.x, R.sub.y and R.sub.z are also independently selected from H, OH, OCOR.sup.1, COOH, CO.sub.2 R.sup.1 (CH.sub.2).sub.p OH, (CH.sub.2).sub.p CO.sub.2 H, --(CH.sub.2).sub.p OR.sup.1 or --(CH.sub.2).sub.p CO.sub.2 R.sup.1 and p=1-20, R.sup.1 =H or C.sub.1-16 alkyl, when R.sup.1 =C.sub.2-16 alkyl the terminal CH.sub.3 group may be replaced by Br or Cl; provided that at least one of and R.sub.x, R.Type: GrantFiled: May 26, 1998Date of Patent: February 29, 2000Assignee: The Secretary of State for Defence, in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern IrelandInventors: Alan W Hall, David Lacey, Ian C Sage, Keith M Blackwood, Michelle Jones
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Patent number: 5968411Abstract: Liquid crystal polymer materials used in liquid crystal devices, piezoelectric devices, pyroelectric devices and recording media are described.Type: GrantFiled: April 29, 1998Date of Patent: October 19, 1999Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern IrelandInventors: Alan William Hall, David Lacey, Ian Charles Sage, Keith Moray Blackwood, Michelle Jones
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Patent number: 5773179Abstract: Materials of formula (I) are provided, wherein X.sub.1 -X.sub.5 are independently selected from H, F, Cl, NO.sub.2, CF.sub.3, OR, R, SR, .paren open-st.CO-- or .paren open-st.CO-- where R is C.sub.1-15 branched or straight chain alkyl; provided that one of X.sub.1 -X.sub.5 is selected from .paren open-st.CO-- or .paren open-st.OC--; p is at least 2; W=single bond, phenyl, fluorinated phenyl, .dbd., .tbd., cyclohexyl, thiophene, CO, OC; T.sub.1, T.sub.2, T.sub.3, T.sub.4 are independently selected from H, F, Cl, NO.sub.2, CF.sub.3, OR, R, SR, where R is C.sub.1-15 branched or straight chain alkyl; g=0 or 1; X is selected from CO.sub.2 and OOC; n is selected from 1-5; m is selected from 1-20, Y is selected from O, S, CH.sub.2, CO.sub.2, OOC; Q is CH.sub.2 and when m is greater than 1 then non-adjacent CH.sub.Type: GrantFiled: October 22, 1997Date of Patent: June 30, 1998Assignee: The Secretary of State for Defence Defence Evaluation & Research AgencyInventors: Georg H. R. Mehl, John W. Goodby, David Lacey
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Patent number: 5676878Abstract: A liquid crystal polymer or copolymer is disclosed of structure (A) where X=CN, COR, CO.sub.2 R, CHO, CF.sub.3 ; R=branched chain, straight chain or chiral alkyl; .rect-hollow.=any suitable mesogenic group; Z=single covalent bond, oxygen, sulfur, CO.sub.2 or OCO; n=1 to 20; Y=H, OH, F, OCH.sub.3 ; m=3 to 200; P=a single covalent bond, oxygen, or OCO.Type: GrantFiled: October 5, 1995Date of Patent: October 14, 1997Assignees: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland, Evaluation Research Agency, DRAInventors: David Lacey, Alan W. Hall, Jonathan S. Hill, Damien G. McDonnell
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Patent number: 5486309Abstract: Optically active compounds of formula (I), where X has a structure (II) and B is C.sub.1-12 alkyl, a chiral group or a group having a general structure (III), where R and R' are H, C.sub.1-12 alkyl, alkoxy, alkylcarbonyloxy, or alkoxycarbonyl, each ring (IV) and (V) is the same or different, A and D are single bonds or bridging groups, each a and d is 0 or 1; Z, Z' are CN, Cl, F, Br or CF.sub.3 ; provided when Z is CN or Cl, then when B is alkyl X-Y is not (VI) or (VII). Ferroelectric smectic liquid crystal mixtures containing these compounds are also described.Type: GrantFiled: September 22, 1993Date of Patent: January 23, 1996Assignee: The Secretary of State for Defence in Her Majesty'3 s Government of the United Kingdom of Great Britain and Northern IrelandInventors: George W. Gray, David Lacey, Kenneth J. Toyne, Richard M. Scrowston, Ibrahim G. Shenouda, Lawrence K. M. Chan, Madeline J. Bradshaw, Victoria Brimmell, Jennifer Constant, Edward P. Raynes, Adam Jackson, Amarjit K. Samra
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Patent number: 5478496Abstract: The invention relates to the use of chiral and/or achiral compounds, containing at least one structural element from the group comprisingthiazole-2,4-diylthiazole-2,5-diyl1,2,4-thiadiazole-2,5-diyl1,2,4-thiadiazole-3,5-diylas components of media having a smectic liquid-crystalline phase.Type: GrantFiled: November 30, 1992Date of Patent: December 26, 1995Assignee: Merck Patent Gesellschaft mit Beschrankter HaftungInventors: George W. Gray, Richard M. Scrowston, Kenneth J. Toyne, David Lacey, Adam Jackson, Joachim Krause, Eike Poetsch, Thomas Geelhaar, Georg Weber, Andreas Wachtler
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Patent number: 5456859Abstract: There is disclosed a cyanoalkane and cyanoalkene of general formula (I) which shows liquid crystalline properties: wherein R and R.sup.1 are independently C.sub.1-12 alkyl, alkoxy, perfluoroalkyl or perfluoroalkoxy; rings A, B, C and D are independently phenyl, which may carry one or two halogen substituents, trans-cyclohexyl, or (2, 2, 2) bicyclooctyl, each of a, b, c or d being independently 0 or 1 provided (a+b+c+d) is 2 or 3; links A and C are independently a single bond, CH.sub.2 CH.sub.2, COO, OOC, CH.sub.2 O or OCH.sub.2 ; n, m and p are independently 0 or an integer 1 to 4 provided (n+m+p) is not 0; W and Z are independently selected --CH.dbd.C(CN)-- and --C(CN).dbd.CH--; X and Y are independently selected from --CHCN-- and --C(CN).sub.2 --; w, x, y and z are 0 or 1, provided that w and z are 0 if x and/or y are 1, and further provided that at least one of w, x, y and z is 1.Type: GrantFiled: October 8, 1992Date of Patent: October 10, 1995Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern IrelandInventors: George W. Gray, David Lacey, Kenneth J. Toyne, Ibraham G. Shenouda, Abdul Luheshi
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Patent number: 5384071Abstract: This invention relates to novel chiral cyano-containing compounds suitable for use in ferroelectric smectic liquid crystal mixtures.Type: GrantFiled: January 8, 1993Date of Patent: January 24, 1995Assignee: Secretary of State for Defence in her Britannic Majesty's Government of the U.K. of Gt. Britian and Northern IrelandInventors: George W. Gray, David Lacey, Kenneth J. Toyne, Richard M. Scrowston, Ibrahim G. Shenouda, Lawrence K. M. Chan, Adam Jackson, Madeline J. Bradshaw, Victoria Brimmell, Jennifer Constant, Edward P. Raynes, Amarjit K. Samra
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Patent number: 5358663Abstract: Laterally cyano-substituted terphenyls of formula (I), wherein R.sup.1 and R.sup.2 are independently selected from hydrogen or C.sub.1-15 alkyl, alkoxy, or alkyl or alkoxy in which one or more CH.sub.2 groups are replaced by O, COO, OOC, CHX, CX.sub.2, CH=CX, CX=CH, CX=CX, where X is fluorine or chlorine. CRCN where R is alkyl, or C.tbd.C or in which a terminal CH.sub.3 of the said alkyl or alkoxy chain is replaced by CF.sub.3, n is 0 or 1, and the CN and F (if present) substituent are independently located in any of the available substitution positions. Liquid crystal materials containing these terphenyls are also described.Type: GrantFiled: September 18, 1992Date of Patent: October 25, 1994Assignee: The Secretary of State for Defence in her Britannic Majesty'3 s Government of U.K. of Gt. Britain and N. IrelandInventors: George W. Gray, David Lacey, Michael Hird, Kenneth J. Toyne
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Patent number: 5334327Abstract: Novel compounds of formula (I), in which R is R.sup.1, R.sup.1 O or R.sup.1 COO, where R.sup.1 is C.sub.1-12 alkyl, n and m are 0 or 1 provided that (n+m) is 0 or 1, each of a, b, c and d are independently 0 or 1, provided (a+b+c+d) is not zero, but excluding the case where a and b are 0 and m is 0 and one of c or d is 0 are described, being useful constituents of nematic liquid crystal materials.Type: GrantFiled: May 12, 1992Date of Patent: August 2, 1994Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and North IrelandInventors: George W. Gray, David Lacey, Kenneth J. Toyne, Michael Hird, Damien G. McDonnell
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Patent number: 5312563Abstract: Fluorinated 4"-cyano substituted terphenyls of general formula (I), wherein R.sub.1 is selected from alkenyl, H, R, RO and RCO where R is alkyl or perfluoroalkyl containing up to 12 carbon atoms, n is 1, 2 or 3 and the lateral fluorosubstituent(s) may be in any of the available substitution positions are provided. These have liquid crystalline properties and may be used as components of liquid crystal materials.Type: GrantFiled: January 22, 1993Date of Patent: May 17, 1994Assignee: The Secretary of State for Defence in her Britannic Majesty's Government of the U.K. of Great Britain and Northern IrelandInventors: David Coates, Ian Sage, Simon Greenfield, George W. Gray, David Lacey, Kenneth J. Toyne, Lawrence K. Chan, Michael Hird
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Patent number: 5273680Abstract: This invention relates to fluorinated oligophenyls of formula (I), in which a is 0 or 1 and in which the terminal substituents R.sup.1, R.sup.2 and R.sup.3 are each independently an alkyl or alkenyl residue each with up to 15 C atoms, optionally substituted by CN or by at least one halogen atom, and wherein one or more non adjacent CH.sub.2 groups of these residues may be replaced by --O--, --S--, --CO--, --O--CO--, --CO--O--, --O--CO--O-- or --C.tbd.C--, one of the residues R.sup.1 and R.sup.2 may also denote a group of formula (II), any one of the following pairs of lateral substituents are both fluorine: (A, B), (C, D), (D, E), (C, E), (B, C), (D, J), (D, K), (A, C), (C, J), (C', D'), (D', E), (D', A), (C', E), (C', A), (D', J'), (D', K'), (C', J'), (B, G), (A, G), all of the other lateral substituents being hydrogen or fluorine, and to their use as components of liquid crystalline compositions.Type: GrantFiled: March 9, 1992Date of Patent: December 28, 1993Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: George W. Gray, Michael Hird, David Lacey, Kenneth J. Toyne, Volker Reiffenrath, Andreas Wachtler, Joachim Krause, Ulrich Finkenzeller, Thomas Geelhaar
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Patent number: 5262081Abstract: The invention comprises liquid crystalline polyesters suited to be used as a medium for optical data storage, especially reversible (or erasable) optical data storage. The polyesters comprise the polycondensation product of an aliphatic dicarboxylic acid or a derivative thereof and propane diol which on its center carbon bears a mesogenic substituent comprising two rings, either alicyclic or aromatic. Preferably also the dicarboxylic acid or derivative thereof is mesogenically substituted. The invention further comprises a medium for optical data storage containing polyesters of the above type.Type: GrantFiled: February 19, 1991Date of Patent: November 16, 1993Assignee: Akzo N.V.Inventors: George W. Gray, Andrew M. McRoberts, Raymond Denman, Richard M. Scrowston, David Lacey