Patents by Inventor Richard C. Calderwood
Richard C. Calderwood 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).
-
Patent number: 7492918Abstract: An audio speaker driver having a voice coil with graduated windings such that different sections of the voice coil have different electrical resistances and/or lengths per unit of height of the voice coil. A center portion of the voice coil gives a greater BL, while outer portions give lower overall electrical resistance, such that the audio speaker driver is highly efficient and linear during low excursion operation, with a smoother transition from the linear region to the grossly non-linear region. The wire of the graduated voice coil can have varying cross-sectional area over its length, can be wound on varying on-center spacing, can be wound in different numbers of layers in the various sections, and/or it can fork into interlaced, parallel windings.Type: GrantFiled: August 17, 2004Date of Patent: February 17, 2009Assignee: Step Technologies Inc.Inventors: Enrique M. Stiles, Richard C. Calderwood
-
Patent number: 7456868Abstract: A digital imaging system such as a camera, in which the ISO sensitivity of a digital imaging sensor is dynamically adjusted in response to factors such as zoom, focal distance, available light, color of the image, charge status of the flash device, and so forth.Type: GrantFiled: February 1, 2002Date of Patent: November 25, 2008Inventor: Richard C. Calderwood
-
Publication number: 20080166010Abstract: A loudspeaker in which the voice coil diameter is so large that the voice coil is axially beneath the suspension roll of the surround. The surround has an overlapping suspension roll such that the inner portion of the surround is coupled to the diaphragm well inward of the bobbin. Such a transducer having greatly extended low frequency abilities by virtue of its wider, softer suspension roll enabling a much lower resonant frequency, and by virtue of its maximum sized magnet and voice coil yielding increased motor strength and power handling. Additionally, the dome diaphragm can now be vented through the portion of the dome that is beneath the surround roll, releasing the trapped back pressure below the diaphragm, thereby further lowering the resonant frequency.Type: ApplicationFiled: January 4, 2007Publication date: July 10, 2008Inventors: Enrique M. Stiles, Richard C. Calderwood
-
Patent number: 7233681Abstract: An electromagnetic transducer such as an audio speaker which includes an asymmetric diaphragm to deliver smooth frequency response with reduced distortion by reduction of common modes in the diaphragm. Other benefits such as asymmetric directivity patterns can be realized. The asymmetric cone has a perimeter OD at which a surround may be coupled, and an ID at which a bobbin or spacer may be coupled. The center of the ID is not coincident with the center of the OD. The transducer further includes a stabilization mechanism for reducing rocking of the diaphragm assembly. The stabilization mechanism may include mass balancing of the diaphragm and/or adjustments to the location or symmetry of the suspension components.Type: GrantFiled: December 24, 2004Date of Patent: June 19, 2007Assignee: STEP Technologies, Inc.Inventors: Patrick M. Tummire, Enrique M. Stiles, Richard C. Calderwood
-
Patent number: 7227970Abstract: An electromagnetic transducer such as an audio speaker, having a motor structure in which a shorting ring that sinks eddy currents also serves as a permanent fixture to provide coaxial alignment of two or more components within the transducer. These components could include various combinations of the yoke, the top plate, the magnet, and/or other parts. Ideally, the shorting ring extends axially as close as possible to the voice coil, to a position immediately adjacent the magnetic air gap.Type: GrantFiled: February 26, 2004Date of Patent: June 5, 2007Assignee: STEP Technologies Inc.Inventors: Richard C. Calderwood, Enrique M. Stiles
-
Patent number: 7180429Abstract: Searching through a series of images such as video images for slowly-moving objects such as enemy snipers, using pattern matching, color matching, brightness matching, or the like. Multiple search speeds facilitate finding objects moving at different velocities through the visual field. Search speeds can be determined as, e.g. every Nth frame, or a frame from every Nth period of time. Background motion, such as bushes blowing in the wind, do not trigger false positives.Type: GrantFiled: February 14, 2002Date of Patent: February 20, 2007Assignee: Intel CorporationInventor: Richard C. Calderwood
-
Patent number: 7181039Abstract: A thermally conductive chimney tube extends through a loudspeaker cabinet that encloses a volume of air heated by a speaker driver. The open ends of the chimney are outside the cabinet. A column of air within the chimney is in contact with the external ambient air, but sealed off from the enclosed volume of air. As the speaker driver heats the enclosed volume of air, the material of the chimney transfers the heat to the column of air, which rises and carries the heat away into the external ambient air, cooling the inside of the loudspeaker cabinet and thus cooling the speaker driver.Type: GrantFiled: January 30, 2004Date of Patent: February 20, 2007Assignee: Step Technologies Inc.Inventors: Enrique M. Stiles, Richard C. Calderwood
-
Patent number: 7177440Abstract: An electromagnetic transducer such as an audio speaker which includes an asymmetric diaphragm to deliver smooth frequency response with reduced distortion by reduction of common modes in the diaphragm. Other benefits such as asymmetric directivity patterns can be realized. The asymmetric cone has a perimeter OD at which a surround may be coupled, and an ID at which a bobbin or spacer may be coupled. The center of the ID is not coincident with the center of the OD. The transducer further includes a stabilization mechanism for reducing rocking of the diaphragm assembly. The stabilization mechanism may include mass balancing of the diaphragm and/or adjustments to the location or symmetry of the suspension components.Type: GrantFiled: December 31, 2002Date of Patent: February 13, 2007Assignee: Step Technologies Inc.Inventors: Patrick M. Turnmire, Enrique M. Stiles, Richard C. Calderwood
-
Patent number: 7063059Abstract: A multi-cylinder four-stroke internal combustion engine enabling a method for on-the-fly switching between two or more firing orders. Switching to the new firing order is done without requiring any tear-down of the engine such as to swap camshafts. Switching can be triggered by the rider, or it can be triggered automatically per conditions such as selected gear, RPM range, track location, velocity, and the like.Type: GrantFiled: November 17, 2004Date of Patent: June 20, 2006Inventor: Richard C. Calderwood
-
Patent number: 7006654Abstract: An electromagnetic transducer such as an audio speaker, having an improved geometry in the positioning of its voice coils relative to its magnetic air gaps, facilitating a greater linear travel. The transducer has a push-pull geometry with at least two voice coils. At all positions throughout the linear travel region, less than 100% of the total voice coil windings are active, and less than 100% of the total available magnetic air gap height is active. As the voice coil assembly moves in one direction, the percentage of active windings or magnetic air gap is seamlessly handed off from the upper voice coil or magnetic air gap to the lower voice coil or magnetic air gap, and vice versa in the opposite direction. Some of the available voice coil windings and some of the available magnetic air gap height are left unused throughout the linear travel region, but, in exchange, the distance of the linear travel is dramatically increased.Type: GrantFiled: February 7, 2003Date of Patent: February 28, 2006Assignee: STEP Technologies, Inc.Inventors: Enrique M. Stiles, Richard C. Calderwood
-
Publication number: 20040156527Abstract: An electromagnetic transducer such as an audio speaker, having an improved geometry in the positioning of its voice coils relative to its magnetic air gaps, facilitating a greater linear travel. The transducer has a push-pull geometry with at least two voice coils. At all positions throughout the linear travel region, less than 100% of the total voice coil windings are active, and less than 100% of the total available magnetic air gap height is active. As the voice coil assembly moves in one direction, the percentage of active windings or magnetic air gap is seamlessly handed off from the upper voice coil or magnetic air gap to the lower voice coil or magnetic air gap, and vice versa in the opposite direction. Some of the available voice coil windings and some of the available magnetic air gap height are left unused throughout the linear travel region, but, in exchange, the distance of the linear travel is dramatically increased.Type: ApplicationFiled: February 7, 2003Publication date: August 12, 2004Inventors: Enrique M. Stiles, Richard C. Calderwood
-
Publication number: 20040125980Abstract: An electromagnetic transducer such as an audio speaker which includes an asymmetric diaphragm to deliver smooth frequency response with reduced distortion by reduction of common modes in the diaphragm. Other benefits such as asymmetric directivity patterns can be realized. The asymmetric cone has a perimeter OD at which a surround may be coupled, and an ID at which a bobbin or spacer may be coupled. The center of the ID is not coincident with the center of the OD. The transducer further includes a stabilization mechanism for reducing rocking of the diaphragm assembly. The stabilization mechanism may include mass balancing of the diaphragm and/or adjustments to the location or symmetry of the suspension components.Type: ApplicationFiled: December 31, 2002Publication date: July 1, 2004Inventors: Patrick M. Turnmire, Enrique M. Stiles, Richard C. Calderwood
-
Publication number: 20030151670Abstract: Searching through a series of images such as video images for slowly-moving objects such as enemy snipers, using pattern matching, color matching, brightness matching, or the like. Multiple search speeds facilitate finding objects moving at different velocities through the visual field. Search speeds can be determined as, e.g. every Nth frame, or a frame from every Nth period of time. Background motion, such as bushes blowing in the wind, do not trigger false positives.Type: ApplicationFiled: February 14, 2002Publication date: August 14, 2003Inventor: Richard C. Calderwood
-
Publication number: 20030146986Abstract: A digital imaging system such as a camera, in which the ISO sensitivity of a digital imaging sensor is dynamically adjusted in response to factors such as zoom, focal distance, available light, color of the image, charge status of the flash device, and so forth.Type: ApplicationFiled: February 1, 2002Publication date: August 7, 2003Inventor: Richard C. Calderwood
-
Patent number: 6442607Abstract: A method includes receiving a stream of data in a computer for transmission from the computer. A determination is made whether a portion of the stream of data indicates personal information. Based on the determination, action is automatically taken to control transmission of the portion of the stream. The method may be performed, for example, by a processor of the computer.Type: GrantFiled: August 6, 1998Date of Patent: August 27, 2002Assignee: Intel CorporationInventors: Rodney A. Korn, Gregory H. Kisor, Richard C. Calderwood
-
Patent number: 6266773Abstract: A computer security system and method. An event detector detects events occurring in a monitored computer system, such as processor events, input events, and output events. A permission category list lists permission categories for events that might occur in the monitored computer system, and a decision maker determines action to be taken in response to detection of the event, based on the permission category of the event. The event detector might include an event list listing events to be detected, and the decision maker might include an action list listing action to be taken in response to different permission categories. If an event is not on the permission category list, the decision maker prohibits performance of the event, or alternatively issues a prompt to the computer user to specify action to be taken.Type: GrantFiled: December 31, 1998Date of Patent: July 24, 2001Assignee: Intel. Corp.Inventors: Gregory H. Kisor, Richard C. Calderwood
-
Patent number: 5978737Abstract: A system for detecting hazardous conditions during operation of a vehicle. In one embodiment, the system includes a plurality of sensors that monitor a plurality of conditions and transmit condition signals each representing a measure of a condition. A plurality of rate determination circuits is coupled to the sensors and continually receives the condition signals, wherein each rate determination circuit calculates rates of change for the condition, including a baseline rate of change, and outputs a potential hazard value representing a deviation of a rate of change from the baseline rate that exceeds a predetermined threshold value. An evaluation circuit receives the potential hazard value, calculates a new potential hazard value using the potential hazard value and a rate of change for at least one associated condition and determines whether an actual hazard exists by comparing the new potential hazard value with a stored value that corresponds to the condition.Type: GrantFiled: October 16, 1997Date of Patent: November 2, 1999Assignee: Intel CorporationInventors: Stephen S. Pawlowski, Andrew F. Glew, George R. Hayek, Harshvardhan P. Sharangpani, Richard C. Calderwood