Patents by Inventor Evangelos Arkas
Evangelos Arkas 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: 8127545Abstract: A solar energy turbine includes solar energy trap (1110) having a chamber with an inlet port (12), such that solar energy (13) entering the chamber through the inlet port is absorbed and reflected within the chamber means until substantially all the solar energy is absorbed by the chamber. Preferably, the inlet port is arranged to cause photons of the solar energy entering the chamber to circulate substantially in a single direction within the chamber until absorbed, such that on re-passing the inlet port substantially no photons emerge from the inlet port. The solar energy turbine includes a heat exchanger (1150, 1160, 1170) for extracting energy from the solar energy trap to drive a turbine (1120).Type: GrantFiled: November 22, 2005Date of Patent: March 6, 2012Inventors: Evangelos Arkas, Nicholas Arkas
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Patent number: 8039732Abstract: A solar energy trap (10) includes a chamber (11) having inlet post (12), such that solar energy (13) entering the chamber (11) through the inlet port (12) is absorbed and reflected within the chamber (11) means until substantially all the solar energy (13) is absorbed by the chamber (11). Preferably, the inlet port (12) is arranged to cause photons of the solar energy (13) entering the chamber (11) to circulate substantially in a single direction within the chamber (11) until absorbed, such that on re-passing the inlet port (12) substantially no photons emerge from the inlet port (12).Type: GrantFiled: August 17, 2005Date of Patent: October 18, 2011Inventors: Evangelos Arkas, Nicholas Arkas
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Publication number: 20080256953Abstract: A solar energy turbine includes solar energy trap (1110) having a chamber with an inlet port (12), such that solar energy (13) entering the chamber through the inlet port is absorbed and reflected within the chamber means until substantially all the solar energy is absorbed by the chamber. Preferably, the inlet port is arranged to cause photons of the solar energy entering the chamber to circulate substantially in a single direction within the chamber until absorbed, such that on re-passing the inlet port substantially no photons emerge from the inlet port. The solar energy turbine includes a heat exchanger (1150, 1160, 1170) for extracting energy from the solar energy trap to drive a turbine (1120).Type: ApplicationFiled: November 22, 2005Publication date: October 23, 2008Inventors: Evangelos Arkas, Nicholas Arkas
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Publication number: 20080066800Abstract: A solar energy trap (10) includes a chamber (11) having inlet post (12), such that solar energy (13) entering the chamber (11) through the inlet port (12) is absorbed and reflected within the chamber (11) means until substantially all the solar energy (13) is absorbed by the chamber (11). Preferably, the inlet port (12) is arranged to cause photons of the solar energy (13) entering the chamber (11) to circulate substantially in a single direction within the chamber (11) until absorbed, such that on re-passing the inlet port (12) substantially no photons emerge from the inlet port (12).Type: ApplicationFiled: August 17, 2005Publication date: March 20, 2008Inventors: Evangelos Arkas, Nicholas Arkas
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Publication number: 20070274434Abstract: A period-to-digital converter includes a clock (1) for generating a timing signal, delay lines (2) for producing cumulatively incrementally delayed timing signals for each cycle of the timing signal and an isolator (3) connected in parallel to the delay lines for generating a signal indicative of a number of partial cycles of timing signal corresponding to which to the incrementally delayed turning signals last contained a specific feature. First and second counters (5, 8) connected to the isolator are enabled for successive time periods to be measured and the first and second latches (11, 12) respectively connected to the first and second counters are latched at the end of alternate successive time periods respectively. An arithmetic module (22) connected to the first and second latches obtains difference values between their output values, which difference values are representative of the successive time periods respectively.Type: ApplicationFiled: January 27, 2004Publication date: November 29, 2007Inventors: Evangelos Arkas, Nicholas Arkas
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Patent number: 6928219Abstract: A method of forming a solid or honeycombed optical channel plate, having solid or hollow waveguides respectively, from aligned optical waveguides. Reflective optical channel plates are also disclosed for use with a front projection screen and transmission optical channel plates are also disclosed for use with a front projection screen and transmission optical channel plates for use with a rear projection screen for increasing luminance and/or resolution of an image projected on the screen.Type: GrantFiled: July 12, 2001Date of Patent: August 9, 2005Inventor: Evangelos Arkas
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Patent number: 6897686Abstract: A pulse detector has a leading edge detector and a trailing edge detector. A timing circuit is provided for determining the pulse duration between the leading edge and the trailing edge of a signal pulse; and a divider divides the pulse duration to produce a first timing pulse representative of a mid-point or peak of the signal pulse. An inventer may also be provided to produce a second timing pulse representative of troughs between signal pulses. A combiner may optionally be provided for combining the first and second timing pulses. The detector has application in signal cleaning circuits.Type: GrantFiled: February 2, 2004Date of Patent: May 24, 2005Assignee: Diadalos, IncInventors: Evangelos Arkas, Nicholas Arkas
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Publication number: 20040169528Abstract: A pulse detector has a leading edge detector and a trailing edge detector. A timing circuit is provided for determining the pulse duration between the leading edge and the trailing edge of a signal pulse; and a divider divides the pulse duration to produce a first timing pulse representative of a mid-point or peak of the signal pulse. An inventer may also be provided to produce a second timing pulse representative of troughs between signal pulses. A combiner may optionally be provided for combining the first and second timing pulses. The detector has application in signal cleaning circuits.Type: ApplicationFiled: February 2, 2004Publication date: September 2, 2004Inventors: Evangelos Arkas, Nicholas Arkas
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Publication number: 20040135613Abstract: A Pulse Clock Delay (PCT) apparatus (208) includes a selectable plurality (Nd) of series-connected pulse transition delay units (209) from a total plurality (Nmax) of such units. Each unit provides an incremental proximal node (n1a) and an adjacent electrically isolated second intermediate node (n1b) where the first and second intermediate nodes are in a shorter (215a, 215b) of two signal paths having respective proximal and spaced apart distal ends (212, 216) in an electrical network.Type: ApplicationFiled: December 23, 2003Publication date: July 15, 2004Inventors: Evangelos Arkas, Nicholas Arkas
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Publication number: 20040079358Abstract: A solar energy concentrator is formed in the shape of a spiral horn, so that solar energy incident over a wide range of incident angles on the mouth of the horn is concentrated by multiple reflections from inner walls of the horn to emerge from an exit aperture at the centre of the horn. Solar energy emerging from the collector may be distributed by light pipes to illuminate a building or may be transmitted to a solar energy conversion chamber having a small entry aperture. The entry aperture acts as black body absorbing all solar energy incident upon it and the solar energy may be converted within the chamber either by photovoltaic cells and/or by heat absorbing media.Type: ApplicationFiled: October 22, 2003Publication date: April 29, 2004Inventors: Evangelos Arkas, Nicholas Arkas
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Patent number: 6696875Abstract: A Pulse Clock Delay (PCD) apparatus (208) includes a selectable plurality (Nd) of series-connected pulse transition delay units (209) from a total plurality (Nmax) of such units. Each unit provides an incremental transition delay interval DELTA t. The PCD may be connected to a first intermediate proximal node (n1a) and an adjacent electrically isolated second intermediate node (n1b) where the first and second intermediate nodes are in a shorter (215a, 215b) of two signal paths having respective proximal and spaced apart distal ends (212, 216) in an electrical network.Type: GrantFiled: January 7, 2002Date of Patent: February 24, 2004Assignee: Daidalos, Inc.Inventors: Evangelos Arkas, Nicholas Arkas
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Publication number: 20040022506Abstract: A method of forming a solid or honeycombed optical channel plate, having solid or hollow waveguides respectively, from aligned optical waveguides. Reflective optical channel plates are also disclosed for use with a front projection screen and transmission optical channel plates are also disclosed for use with a front projection screen and transmission optical channel plates for use with a rear projection screen for increasing luminance and/or resolution of an image projected on the screen.Type: ApplicationFiled: June 23, 2003Publication date: February 5, 2004Inventor: Evangelos Arkas
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Patent number: 6666207Abstract: A solar energy concentrator (1) is formed in the shape of a spiral horn, so that solar energy incident over a wide range of incident angles on the mouth (2) of the horn is concentrated by multiple reflections from inner walls (5) of the horn to emerge from an exit aperture (3) at the center of the horn. Solar energy emerging from the collector may be distributed by light pipes (40) to illuminate a building or may be transmitted to a solar energy conversion chamber (50) having a small entry aperture (51). The entry aperture (51) acts as black body absorbing all solar energy incident upon it and the solar energy may be converted within the chamber (50) either by photovoltaic cells and/or by heat absorbing media.Type: GrantFiled: August 6, 2001Date of Patent: December 23, 2003Assignee: Prometheus Technology, Inc.Inventors: Evangelos Arkas, Nicholas Arkas
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Patent number: 5424735Abstract: An analogue to digital converter has input for receiving an analogue signal and a frequency modulator for modulating the frequency of a carrier signal in dependence upon the analogue input signal. A digital counter counts the time between successive events in the modulated signal to provide digital signals representative of the analogue input signal.Type: GrantFiled: September 13, 1993Date of Patent: June 13, 1995Assignee: Advanced Intelligence Inc.Inventors: Evangelos Arkas, Nicholas Arkas