Patents by Inventor Charles W. Roberts
Charles W. Roberts 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: 5521572Abstract: An air-coupled current transformer is provided with a primary current conductor and two secondary coils connected such that the emf induced in each coil by an external disturbing magnetic flux is subtractive, whereas the emf induced by the current in the primary is additive. Two ferromagnetic core pieces enhance the rejection of the emf induced by the disturbing flux. Ceramic spacers are inserted into air gaps between the core pieces for maintaining the gaps fixed to keep the scale factor of the transformer independent of temperature.Type: GrantFiled: November 14, 1994Date of Patent: May 28, 1996Assignee: Schlumberger Industries, Inc.Inventors: R. Wendell Goodwin, Charles W. Roberts
-
Patent number: 5386126Abstract: A solid state, electronic, optical transition device includes a multiple-layer structure of semiconductor material which supports substantially ballistic electron/hole transport at energies above/below the conduction/valance band edge. The multiple layer structure of semiconductor material includes a Fabry-Perot filter element for admitting electrons/holes at a first quasibound energy level above/below the conduction/valance band edge, and for depleting electrons/holes at a second quasibound energy level which is lower/higher than the first energy level. Such an arrangement allows common semiconductor material to be used to produce emitters and detectors and other devices which can operate at any of selected frequencies over a wide range of frequencies.Type: GrantFiled: January 29, 1993Date of Patent: January 31, 1995Inventors: Gregory H. Henderson, Lawrence C. West, Thomas K. Gaylord, Charles W. Roberts, Elias N. Glytsis, Moses T. Asom
-
Patent number: 5002429Abstract: A portable fluid collection and removal apparatus includes an elongated flexible conduit having a generally circular outer wall provided with a perforated flat bottom wall. The inner passageway of the conduit is filled with fluid absorbent material whereby fluid beneath the conduit is drawn upwardly through the perforated bottom wall, into the absorbent material. Wicks leading from the interior fluid absorbent material extend through the flat bottom wall perforations and project outward to expand the area of absorbency by capillary action. Passageways between plural exterior walls transmit auxiliary fluids to warm the conduit to prevent freezing while, a plurality of the conduits may be assembled in a laterally juxtaposed manner to form a blanket.Type: GrantFiled: December 8, 1988Date of Patent: March 26, 1991Inventor: Charles W. Roberts
-
Patent number: 4899754Abstract: A biomedical electrode (10) adapted to be applied to a body, the biomedical electrode (10) having a surface area divided into a first zone (38), a second zone (40), and a third zone (42). The biomedical electrode (10) has a first layer of adhesive (24) which is electrically conductive and which is adapted to be applied to the body, a conductive layer (22) positioned adjacent the first layer of adhesive (24), a second layer of adhesive (16), and a protective, electrically insulative web (12) positioned adjacent the second layer of adhesive (16). The second layer of adhesive (16) holds the protective, electrically insulative web (12) to the conductive layer (22) in the third zone (42) of the biomedical electrode (10).Type: GrantFiled: April 8, 1988Date of Patent: February 13, 1990Assignee: Minnesota Mining and Manufacturing CompanyInventors: Jerome G. Bly, Charles W. Roberts
-
Patent number: 4823856Abstract: A rubber article (A) has a design (12) outlined by a serrated portion including a plurality of ribs (22) which are separated by grooves (20). The ribs and grooves are located in a surface (10) of the article (A) and the design (12) is defined by a substantially flat ungrooved portion of the article surface. The ribs (22) extend no further outwardly than the article surface (10).Type: GrantFiled: July 31, 1986Date of Patent: April 25, 1989Assignee: The Goodyear Tire & Rubber CompanyInventor: Charles W. Roberts
-
Patent number: 4771783Abstract: A biomedical electrode (10) adapted to be applied to a body and adapted to be electrically and mechanically connected to an electrical lead wire (14). The electrode (10) contains a protective, electrically insulative web 12) and an adhesive (16) adjacent one side of the web (12) which is adapted to be oriented to the body. A release liner (18) is placed between the web (12) next to adhesive (16) to facilitate removal and placement of an electrical lead wire (14). An electrically conductive film (22) is positioned adjacent the adhesive (16) opposite the release liner (18). Finally, another layer of adhesive (24) which is electrically conductive is positioned adjacent the electrically conductive film (22) opposite the layer (16of adhesive, which electrically conductive adhesive (24) is adapted to be applied to a body. Alternatively, the electrode (10) has a metallic coating (34) applied to the bottom side of a protective, electrically insulative web (32).Type: GrantFiled: October 3, 1986Date of Patent: September 20, 1988Assignee: Minnesota Mining and Manufacturing CompanyInventor: Charles W. Roberts
-
Patent number: 4727880Abstract: A biomedical electrode (10) adapted to be applied to a body and adapted to be electrically and mechanically connected to an electrical lead wire (14). The electrode (10) contains a protective, electrically insulative web (12) and an electrically conductive adhesive (20 or 24) adjacent one side of the web (12) which is adapted to be oriented to the body. A release liner (18) is placed between the web (12) and the electrically conductive adhesive (20-24) to facilitate removal and placement of an electrical lead wire (14). The biomedical electrode (10) may have a first layer of pressure sensitive adhesive (16) applied between the web (12) and the release liner (18). A second layer of adhesive (24) which is electrically conductive may be positioned adjacent the release liner (18) opposite from the web (12).Type: GrantFiled: August 1, 1986Date of Patent: March 1, 1988Assignee: Minnesota Mining and Manufacturing CompanyInventor: Charles W. Roberts
-
Patent number: 4444607Abstract: This invention comprises a process for molding a three dimensional decorative article where cored out or raised portions extend to a depth of at least 0.6 centimeter, said process comprising generating electronically a line drawing of said article and electronically displaying the drawing; photographing said drawing to form a photographic transparency; positioning said transparency over a layer of a liquid photopolymer having a depth greater than 0.6 centimeter; exposing said photopolymer through said transparency to actinic light to set the photopolymer; and removing the liquid from the set photopolymer to form a three dimensional article having the appearance of said drawing.Type: GrantFiled: March 25, 1982Date of Patent: April 24, 1984Assignee: The Goodyear Tire & Rubber CompanyInventors: Stephen Lash, Charles W. Roberts, Samuel P. Landers
-
Patent number: 4351381Abstract: A tread capable of being used in all seasons and weather conditions comprising of a substantially centrally located rib which extends circumferentially about the tire, a plurality of independent projections placed about the remaining portion of the tire. The independent projections are placed so as to provide for two circumferentially extending grooves, one on either side of the central rib and a plurality of laterally extending grooves which extend from each central groove to the tread edge of the tire. The tread has a low net to gross ratio.Type: GrantFiled: November 12, 1980Date of Patent: September 28, 1982Assignee: The Goodyear Tire & Rubber CompanyInventors: Charles W. Roberts, Daniel J. Lindner, Henry T. Kwee, Michael A. Kolowski, Harold D. Fetty
-
Patent number: 4296789Abstract: A tread for a pneumatic tire having a plurality of circumferentially spaced independent projections. The tread has three narrow zones which extend circumferentially about the tire; a central zone and two shoulder zones. The depth of the recesses in between the independent projections in these zones is substantially less than the depth of the recesses in between the projections in the remaining portion of the tread.Type: GrantFiled: December 11, 1980Date of Patent: October 27, 1981Assignee: The Goodyear Tire & Rubber CompanyInventors: Charles W. Roberts, Michael A. Kolowski, Daniel J. Lindner, John E. Lynch, Terrence M. Ruip, Harold D. Fetty
-
Patent number: 4221254Abstract: A tread for a pneumatic tire having a plurality of circumferentially spaced independent projections, each projection has an outer configuration which is basically triangular as viewed in a plane perpendicular to the tread. The projections in the central portion of the tread are oriented such that the leading edges form an angle from about 30.degree. to 60.degree. with respect to the mid-circumferential plane of the tire, and the projections in the shoulder portions are oriented such that the leading edges form an angle from about 30.degree. to 70.degree. with respect to the mid-circumferential plane of the tire.Type: GrantFiled: February 14, 1978Date of Patent: September 9, 1980Assignee: The Goodyear Tire & Rubber CompanyInventors: Charles W. Roberts, Michael A. Kolowski, Daniel J. Lindner, John E. Lynch, Terrence M. Ruip, Harold D. Fetty
-
Patent number: 4198774Abstract: Indicia of enhanced visibility for rubber articles, and particularly for tires, are formed by a series of substantially straight lineal projections of the same approximate cross section integral of the article. The projections are continuous within the configuration of each indicium. Each indicium may include raised borders and/or may in total be raised above the surface of the article immediately surrounding the indicium. The cross-sectional width of a projection is from about 30 percent to 70 percent of the distance between the longitudinal axes of adjacent projections. To further enhance visibility dirt-retaining projections may be employed.Type: GrantFiled: November 18, 1977Date of Patent: April 22, 1980Assignee: The Goodyear Tire & Rubber CompanyInventors: Charles W. Roberts, Homer B. Lowther
-
Patent number: D244129Type: GrantFiled: June 22, 1976Date of Patent: April 26, 1977Assignee: The Goodyear Tire & Rubber CompanyInventors: Michael A. Kolowski, Charles W. Roberts
-
Patent number: D244596Type: GrantFiled: June 21, 1976Date of Patent: June 7, 1977Assignee: The Goodyear Tire & Rubber CompanyInventors: Harold D. Fetty, Charles W. Roberts
-
Patent number: D254000Type: GrantFiled: February 14, 1978Date of Patent: January 22, 1980Assignee: The Goodyear Tire & Rubber CompanyInventors: Michael A. Kolowski, Daniel J. Lindner, Henry T. Kwee, Charles W. Roberts, Harold D. Fetty
-
Patent number: D254541Type: GrantFiled: February 14, 1978Date of Patent: March 25, 1980Assignee: The Goodyear Tire & Rubber CompanyInventors: Michael A. Kolowski, Daniel J. Lindner, John E. Lynch, Charles W. Roberts