Patents by Inventor David E. Schafer
David E. Schafer 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: 8824726Abstract: An armature apparatus includes a first tine member, a second tine member, a center tine member, and a connecting portion. The connecting portion is coupled to the first tine member, the second tine member, and the connecting portion, and the connecting portion has a line of symmetry. The center tine member is attached to the connecting portion along the line of symmetry such that approximately one half the area of the connection portion is above the center tine member and approximately one half the area of the connection portion is below the center tine member. The attachment is effective to prevent a formation of a horizontal force in the center tine member along the third length when a vertical force is applied to the center tine member in the direction of third thickness.Type: GrantFiled: July 22, 2013Date of Patent: September 2, 2014Assignee: Knowles Electronics, LLCInventors: Thomas E. Miller, Clifford Ryan Grounds, Henry Nepomuceno, David E. Schafer, George Patterson
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Publication number: 20130315436Abstract: An armature apparatus includes a first tine member, a second tine member, a center tine member, and a connecting portion. The connecting portion is coupled to the first tine member, the second tine member, and the connecting portion, and the connecting portion has a line of symmetry. The center tine member is attached to the connecting portion along the line of symmetry such that approximately one half the area of the connection portion is above the center tine member and approximately one half the area of the connection portion is below the center tine member. The attachment is effective to prevent a formation of a horizontal force in the center tine member along the third length when a vertical force is applied to the center tine member in the direction of third thickness.Type: ApplicationFiled: July 22, 2013Publication date: November 28, 2013Applicant: Knowles Electronics, LLCInventors: Thomas E. Miller, Clifford Ryan Grounds, Henry Nepomuceno, David E. Schafer, George Patterson
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Patent number: 8494209Abstract: An armature apparatus includes a first tine member, a second tine member, a center tine member, and a connecting portion. The first tine member has a first length and a first width and these define a first surface. The second tine member has a second length and a second width and these define a second surface. The first surface generally faces the second surface and the first surface is generally parallel relation to the second surface. The center tine member has a third length and the third length is generally parallel to the first length and the second length. The connecting portion couples the center tine member to the first surface along the first length and to the second surface along the second length. The center tine member is generally disposed in a plane extending between the first tine member and the second tine member and the plane divides the first surface of the first tine member and the second surface of the second tine member.Type: GrantFiled: May 11, 2010Date of Patent: July 23, 2013Assignee: Knowles Electronics, LLCInventors: Thomas E. Miller, Clifford Ryan Grounds, Henry Nepomuceno, David E. Schafer, George Patterson
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Publication number: 20100284561Abstract: An armature apparatus includes a first tine member, a second tine member, a center tine member, and a connecting portion. The first tine member has a first length and a first width and these define a first surface. The second tine member has a second length and a second width and these define a second surface. The first surface generally faces the second surface and the first surface is generally parallel relation to the second surface. The center tine member has a third length and the third length is generally parallel to the first length and the second length. The connecting portion couples the center tine member to the first surface along the first length and to the second surface along the second length. The center tine member is generally disposed in a plane extending between the first tine member and the second tine member and the plane divides the first surface of the first tine member and the second surface of the second tine member.Type: ApplicationFiled: May 11, 2010Publication date: November 11, 2010Inventors: Thomas E. Miller, Clifford Ryan Grounds, David E. Schafer, Henry Nepomuceno, George Patterson
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Patent number: 7415125Abstract: A receiver assembly includes a first diaphragm assembly having a diaphragm, and a second diaphragm assembly having a diaphragm. A linkage assembly is coupled to an armature of the receiver. The linkage assembly is also coupled to the first diaphragm assembly and to the second diaphragm assembly.Type: GrantFiled: May 10, 2004Date of Patent: August 19, 2008Assignee: Knowles Electronics, LLCInventors: Daniel M. Warren, Stephen C. Thompson, David E. Schafer
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Patent number: 7366317Abstract: Various linkage assemblies are shown and described for connecting a first movable member to a second movable member of a transducer. The linkage assemblies provide for motion amplification or reduction and, when used for sound generating purposes such as hearing aids or speakers, three different schemes for compensating for amplification-induced distortion. One scheme for compensating for distortion while providing amplification is the use of a lower horizontal span segment in a closed-loop linkage assembly that is longer than a corresponding upper horizontal span segment or upper vertex. Thus, a horizontal span segment used to connect the loop to the first movable member of the armature is longer than a corresponding segment or vertex used to connect the loop to the second movable member. A second distortion compensating feature that provides amplification is found in the use of non-parallel legs used to connect the linkage loop to the housing.Type: GrantFiled: October 18, 2004Date of Patent: April 29, 2008Assignee: Knowles Electronics, LLCInventors: Thomas Edward Miller, David E. Schafer
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Patent number: 7336797Abstract: A receiver assembly includes a housing having a fixed housing portion and a shiftable housing portion cooperating to define a hollow cavity. A flexible membrane secured between the fixed housing portion and the shiftable housing portion and adapted to allow relative motion between the fixed and shiftable housing portions. The receiver assembly further includes a magnetic motor assembly including a displaceable drive rod; and a link assembly having a first end fixedly attached to an inner surface of the shiftable housing and a second end coupled to the drive rod. The link assembly translates the shiftable housing portion relative to the fixed housing portion in response to the displacement of the drive rod.Type: GrantFiled: May 10, 2004Date of Patent: February 26, 2008Assignee: Knowles Electronics, LLC.Inventors: Stephen C. Thompson, David E. Schafer, Daniel M. Warren
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Patent number: 7164776Abstract: A balanced receiver providing significantly reduced vibration is disclosed. The balanced receiver comprises a closed loop operably attached between an armature and a diaphragm. The effective moving mass of the diaphragm is designed to match the effective moving mass of the armature. The closed loop facilitates the balancing of the motion of the diaphragm and the motion of the armature, thus reducing the vibration of the receiver.Type: GrantFiled: January 5, 2001Date of Patent: January 16, 2007Assignee: Knowles Electronics, LLC.Inventors: Thomas Miller, August Mostardo, Elmer Carlson, David E. Schafer
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Publication number: 20040258260Abstract: A receiver assembly includes a housing having a fixed housing portion and a shiftable housing portion cooperating to define a hollow cavity. A flexible membrane secured between the fixed housing portion and the shiftable housing portion and adapted to allow relative motion between the fixed and shfitable housing portions. The receiver assembly further includes a magnetic motor assembly including a displaceable drive rod; and a link assembly having a first end fixedly attached to an inner surface of the shiftable housing and a second end coupled to the drive rod. The link assembly translates the shiftable housing portion relative to the fixed housing portion in response to the displacement of the drive rod.Type: ApplicationFiled: May 10, 2004Publication date: December 23, 2004Inventors: Stephen C. Thompson, David E. Schafer, Daniel M. Warren
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Patent number: 5870482Abstract: Multiple embodiments of a solid state condenser transducer, and methods of manufacture, are disclosed. The transducer comprises a semi-conductor substrate forming a frame and having an opening, a thin-film cantilever structure forming a diaphragm extending over a portion of the opening, the structure having a proximal portion and a distal portion. The proximal portion is attached to the frame, and the distal portion extends over a portion of the frame. A variable gap capacitor having a movable plate and a fixed plate is provided, wherein the movable plate is disposed on the distal portion of the structure and the fixed plate is disposed on the frame adjacent the movable plate.Type: GrantFiled: February 25, 1997Date of Patent: February 9, 1999Assignee: Knowles Electronics, Inc.Inventors: Peter V. Loeppert, David E. Schafer
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Patent number: 5740261Abstract: A housing for shielding a transducer of the type mounted on a silicon die attached to a flexible circuit. The housing provides a jacket which protects the silicon die from physical damage. The jacket, in cooperation with the top and bottom cups, further provides a shield for the silicon die from light and electromagnetic interferences. An acoustic port located on the top portion of the jacket furnishes the means by which acoustic energy enters the jacket to contact the transducer. A back cavity, formed between the bottom cup and the silicon die, serves as the acoustic pressure reference which allows the microphone to function properly.Type: GrantFiled: November 21, 1996Date of Patent: April 14, 1998Assignee: Knowles Electronics, Inc.Inventors: Peter V. Loeppert, David E. Schafer
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Patent number: 4640702Abstract: 2-chloro-4-trifluoromethyl-5-thiazolecarbothioic acid derivatives having the formula ##STR1## where R is C.sub.1-5 alkyl, phenyl or benzyl, have been found to be effective in reducing herbicidal injury to grain sorghum caused by the application thereto of a 2-haloacetanilide herbicide, especially, alachlor.Type: GrantFiled: July 14, 1980Date of Patent: February 3, 1987Assignee: Monsanto CompanyInventors: Raymond C. Grabiak, Robert K. Howe, David E. Schafer
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Patent number: 4605431Abstract: The disclosure herein relates to the use of organophosphorous compounds as antidotes for thiolcarbamate herbicides used in various crops, particularly grass crops, e.g., corn, rice, barley, sorghum and wheat.Type: GrantFiled: December 24, 1984Date of Patent: August 12, 1986Assignee: Monsanto CompanyInventors: David E. Schafer, Albert J. Czajkowski
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Patent number: 4594093Abstract: This invention relates to triester derivatives of N-phosphonomethylthionoglycine which represent a new class of organic chemical compounds. This invention further relates to herbicidal compositions and methods employing such compounds.Type: GrantFiled: November 26, 1984Date of Patent: June 10, 1986Assignee: Monsanto Co.Inventors: James A. Sikorski, David E. Schafer
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Patent number: 4507143Abstract: The invention relates to the use of certain organothiophosphorous compounds as antidotes for thiocarbamate herbicides in grass crops as well as to herbicidal compositions containing a thiocarbamate herbicide and an antidotally effective amount of an organothiophosphorous compound.Type: GrantFiled: February 14, 1983Date of Patent: March 26, 1985Assignee: Monsanto CompanyInventors: David E. Schafer, Albert J. Czajkowski
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Patent number: 4379716Abstract: The disclosure herein relates to the use of organophosphorous compounds as antidotes for thiolcarbamate herbicides used in various crops, particularly grass crops, e.g., corn, rice, barley, sorghum and wheat.Type: GrantFiled: July 10, 1978Date of Patent: April 12, 1983Assignee: Monsanto CompanyInventors: David E. Schafer, Albert J. Czajkowski
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Patent number: 4347366Abstract: The invention relates to 2-(pyridylthio)pyridine-N-oxides and their use in reducing the herbicidal injury to sorghum due to the application thereto of various herbicides.Type: GrantFiled: May 19, 1980Date of Patent: August 31, 1982Assignee: Monsanto CompanyInventors: John J. D'Amico, David E. Schafer
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Patent number: 4243406Abstract: The invention relates to the safening of crop plants to the use of herbicides using a 5-aryl-4-isoxazolecarboxylate or composition containing such compounds to reduce the herbicidal injury to treated crop plants. The invention is also concerned with novel compositions which comprise an acetanilide herbicide and a 5-aryl-4-isoxazolecarboxylate.Type: GrantFiled: December 26, 1978Date of Patent: January 6, 1981Assignee: Monsanto CompanyInventors: Lawrence H. Brannigan, John E. Franz, David E. Schafer
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Patent number: 4239527Abstract: The invention relates to 2-(pyridylthio)pyridine-N-oxides and their use in reducing the herbicidal injury to sorghum due to the application thereto of various herbicides.Type: GrantFiled: November 24, 1978Date of Patent: December 16, 1980Assignee: Monsanto CompanyInventors: John J. D'Amico, David E. Schafer
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Patent number: 4231786Abstract: A method and compositions for reducing injury to crops, especially wheat and sorghum, by thiolcarbamate herbicides employing compounds having in common the base structure ##STR1## wherein Y and Y' are oxygen or sulfur.Type: GrantFiled: December 26, 1974Date of Patent: November 4, 1980Assignee: Monsanto CompanyInventors: Albert J. Czajkowski, David E. Schafer