Patents by Inventor Alan F. Lindsay
Alan F. Lindsay 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: 11520139Abstract: A rotating steering mirror assembly comprising a first wedge rotatable relative to a base and a second wedge rotatable relative to the first wedge to controllably tilt a mirror on an outward- or forward-facing surface of the second wedge. Respective motors can independently rotate the first and second wedges.Type: GrantFiled: April 20, 2020Date of Patent: December 6, 2022Assignee: LOCKHEED MARTIN CORPORATIONInventors: Dennis J. Adams, Alan F. Lindsay
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Publication number: 20210325664Abstract: A rotating steering mirror assembly comprising a first wedge rotatable relative to a base and a second wedge rotatable relative to the first wedge to controllably tilt a mirror on an outward- or forward-facing surface of the second wedge. Respective motors can independently rotate the first and second wedges.Type: ApplicationFiled: April 20, 2020Publication date: October 21, 2021Applicant: LOCKHEED MARTIN CORPORATIONInventors: Dennis J. Adams, Alan F. Lindsay
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Patent number: 8400700Abstract: A beam steering device is disclosed which includes an outer assembly rotatable about an axis by a motor assembly, and an inner assembly rotatable about the axis by another motor assembly and positioned radially within the outer assembly. The beam steering device also includes a first prism or grating connected to the outer assembly and a second prism or grating connected to the inner assembly. Both motor assemblies are axially displaced from the steering devices. The beam steering device also consists of beam expansion optics carried by either the inner assembly or the stationary assembly. In a further embodiment, an array of steerable sub-apertures are maintained within the inner and outer assemblies.Type: GrantFiled: September 15, 2010Date of Patent: March 19, 2013Assignee: Lockheed Martin CorporationInventors: Dennis J. Adams, Alan F. Lindsay, Brian L. Stamper, Charles T. Knorr, Aaron P. Seibel, Michael R. Crano
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Patent number: 7898712Abstract: A Risley integrated steering module is disclosed. The beam steering device consists of an outer assembly rotatable about an axis, and an inner assembly rotatable about the axis and positioned radially within the outer assembly. The beam steering device also includes a first prism connected to the outer assembly and a second prism connected to the inner assembly, and a stationary assembly, with the outer and inner assemblies being rotatable about the portion of the stationary assembly. In an alternative embodiment, the inner assembly rotates within the stationary assembly. The beam steering device also consists of beam expansion optics carried by either the inner assembly or the stationary assembly.Type: GrantFiled: June 25, 2009Date of Patent: March 1, 2011Assignee: Lockheed Martin CorporationInventors: Dennis J. Adams, Alan F. Lindsay, Brian L. Stamper, Charles T. Knorr, Aaron P. Seibel, Michael R. Crano
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Publication number: 20110043880Abstract: A beam steering device is disclosed which includes an outer assembly rotatable about an axis by a motor assembly, and an inner assembly rotatable about the axis by another motor assembly and positioned radially within the outer assembly. The beam steering device also includes a first prism or grating connected to the outer assembly and a second prism or grating connected to the inner assembly. Both motor assemblies are axially displaced from the steering devices. The beam steering device also consists of beam expansion optics carried by either the inner assembly or the stationary assembly. In a further embodiment, an array of steerable sub-apertures are maintained within the inner and outer assemblies.Type: ApplicationFiled: September 15, 2010Publication date: February 24, 2011Inventors: Dennis J. Adams, Alan F. Lindsay, Brian L. Stamper, Charles T. Knorr, Aaron P. Seibel, Michael R. Crano
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Patent number: 7679733Abstract: An optical tracking device, includes an azimuth sub-assembly providing a 360-degree range of motion and a transducer sensing the azimuth position within this range of motion; and an elevation sub-assembly coupled to the azimuth sub-assembly and providing at least a ?30-degree to +100-degree range of motion and a transducer sensing the elevation position. A cross-elevation sub-assembly is coupled to the elevation sub-assembly and provides at least a ±14-degree optical range of motion and a transducer sensing the cross-elevation position. An elevation gyroscope is affixed to the elevation sub-assembly and generates an elevation rate signal; and a cross-elevation gyroscope is affixed to the elevation sub-assembly and generates a cross-elevation rate signal. A controller receives the azimuth, elevation, and cross-elevation position signals, and the elevation and cross-elevation rate signals and sends command signals to the sub-assemblies to initiate movement to allow inertially stabilized tracking of an object.Type: GrantFiled: September 24, 2007Date of Patent: March 16, 2010Assignee: Lockheed Martin CorporationInventors: Dennis L. Carter, Susan E. Hall, Allen T. Hicks, Charles T. Knorr, Alan F. Lindsay, Timothy E. Macklin
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Publication number: 20090323203Abstract: A Risley integrated steering module is disclosed. The beam steering device consists of an outer assembly rotatable about an axis, and an inner assembly rotatable about the axis and positioned radially within the outer assembly. The beam steering device also includes a first prism connected to the outer assembly and a second prism connected to the inner assembly, and a stationary assembly, with the outer and inner assemblies being rotatable about the portion of the stationary assembly. In an alternative embodiment, the inner assembly rotates within the stationary assembly. The beam steering device also consists of beam expansion optics carried by either the inner assembly or the stationary assembly.Type: ApplicationFiled: June 25, 2009Publication date: December 31, 2009Inventors: Dennis J. ADAMS, Alan F. Lindsay, Brian L. Stamper, Charles T. Knorr, Aaron P. Seibel, Michael R. Crano
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Publication number: 20090051906Abstract: An optical tracking device, includes an azimuth sub-assembly providing a 360-degree range of motion and a transducer sensing the azimuth position within this range of motion; and an elevation sub-assembly coupled to the azimuth sub-assembly and providing at least a ?30-degree to +100-degree range of motion and a transducer sensing the elevation position. A cross-elevation sub-assembly is coupled to the elevation sub-assembly and provides at least a ±14-degree optical range of motion and a transducer sensing the cross-elevation position. An elevation gyroscope is affixed to the elevation sub-assembly and generates an elevation rate signal; and a cross-elevation gyroscope is affixed to the elevation sub-assembly and generates a cross-elevation rate signal. A controller receives the azimuth, elevation, and cross-elevation position signals, and the elevation and cross-elevation rate signals and sends command signals to the sub-assemblies to initiate movement to allow inertially stabilized tracking of an object.Type: ApplicationFiled: September 24, 2007Publication date: February 26, 2009Applicant: LOCKHEED MARTIN CORPORATIONInventors: Dennis L. Carter, Susan E. Hall, Allen T. Hicks, Charles T. Knorr, Alan F. Lindsay, Timothy E. Macklin
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Patent number: 7336407Abstract: A scanner apparatus which has super-hemispherical coverage includes a receiver, a pair of counter-rotating prisms, and a rotating mirror aligned with the pair of counter-rotating prisms. The rotating mirror and the pair of counter-rotating prisms guide an observed optical signal in a field of regard greater than that which is achievable through the use of only the pair of counter-rotating prisms. The apparatus may also include a laser that generates an optical signal guided by the prisms and the mirror toward an object of interest in the field of regard.Type: GrantFiled: June 28, 2006Date of Patent: February 26, 2008Assignee: Lockheed Martin CorporationInventors: Dennis J. Adams, Charles T. Knorr, Alan F. Lindsay
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Patent number: 7292319Abstract: An optical tracking device, includes an azimuth sub-assembly providing a 360-degree range of motion and a transducer sensing the azimuth position within this range of motion; and an elevation sub-assembly coupled to the azimuth sub-assembly and providing at least a ?30-degree to +100-degree range of motion and a transducer sensing the elevation position. A cross-elevation sub-assembly is coupled to the elevation sub-assembly and provides at least a ±14-degree optical range of motion and a transducer sensing the cross-elevation position. An elevation gyroscope is affixed to the elevation sub-assembly and generates an elevation rate signal; and a cross-elevation gyroscope is affixed to the elevation sub-assembly and generates a cross-elevation rate signal. A controller receives the azimuth, elevation, and cross-elevation position signals, and the elevation and cross-elevation rate signals and sends command signals to the sub-assemblies to initiate movement to allow inertially stabilized tracking of an object.Type: GrantFiled: June 5, 2006Date of Patent: November 6, 2007Assignee: Lockheed Martin Corp.Inventors: Dennis L. Carter, Susan E. Hall, Allen T. Hicks, Charles T. Knorr, Alan F. Lindsay, Timothy E. Macklin
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Patent number: 5916701Abstract: The present invention provides a secured anode seal for a fuel cell which includes at least one housing having a base securable to a top frame wherein the frame has a notch and a recess edge facing the base and a cathode secured between the base and the top frame. A boot is secured between the base and the top frame and received in the notch and recessed edge, wherein an electrolyte chamber is formed between the boot and the cathode and a coolant chamber is formed between the boot and the top frame wherein the boot has a plurality of holes therethrough. The invention also includes an anode which has a plurality of integral posts extending through the plurality of holes of the boot wherein each of the plurality of posts has a head for securing the boot to the anode for precluding migration of material between the electrolyte chamber and the coolant chamber.Type: GrantFiled: October 30, 1997Date of Patent: June 29, 1999Assignee: Lockheed Marin Tactical Defense Systems, Inc.Inventors: Dennis L. Carter, Dane W. Gregg, James T. Frater, Alan F. Lindsay