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...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 7212277 | Substrate holding technique An object holding apparatus including a chuck for holding an object, a holder configured to hold the chuck, a generator provided in the holder and configured to generate a field related to an attraction force, a member provided in the chuck and configured to be attr... | 05/01/2007 |
| 7151428 | Extra hand system The present application is directed to an apparatus designed to hold an object in a stationary position using electromagnetic components. The object is held in a stationary position when at least one electromagnet is activated and the object is released when the at ... | 12/19/2006 |
| 7148776 | Electromagnetic clamp and method for clamping a structure The electromagnetic clamp and method includes an electromagnet and a clamping piece located on opposite sides of a structure to clamp the structure. The electromagnet attracts the clamping piece through the structure when the electromagnet is energized, such that th... | 12/12/2006 |
| 7048248 | Fixture and loading method for PVD coating of cutting tool inserts A method of loading cutting tool inserts in a PVD (Physical Vapor Deposition) coating equipment consists in using a tube manufactured of a non-magnetic metallic material surrounding a stack of alternating discs of a magnetic material and iron. The north poles of the... | 05/23/2006 |
| 6994305 | Magnetic mounting assembly Provided is a magnet mounting assembly including a ferromagnetic support plate having a periphery, two opposite faces, and a ferromagnetic plate extension depending from the periphery, and a permanent magnet disposed on the support plate, in which the plate extensio... | 02/07/2006 |
| 6938815 | Heat-resistant electronic systems and circuit boards Methods of making improved electronic systems and circuits boards, and more specifically to methods of making improved electronic systems and circuits boards using heat-resistant composite materials having superior mechanical, thermal, and electrical properties.... | 09/06/2005 |
| 6824657 | Component support A component carrier for holding at least one component (12), in particular for surface coating by electrodeposition, having at least one holding magnet (31), the magnetic field lines of which run through the component (12) in a region close to a... | 11/30/2004 |
| 6674205 | Auxiliary magnetizing winding for interior permanent magnet rotor magnetization A method and apparatus for fabricating a rotor for an electric traction motor including forming cavities in the rotor, injecting magnetic material in a portion of the cavities, configuring an electrical winding in a portion of the cavities, and post-magne... | 01/06/2004 |
| 6614337 | Magnetic holding device A magnetic holding device for storing and organizing tools that are intrinsically or have been made magnetically conductive is disclosed that includes a first plate having a width, a thickness and at least one opening and a magnet having a first and a sec... | 09/02/2003 |
| 6566992 | Modules creating magnetic anchorage assemblies and relevant assemblies A module (1, 16, 19, 28, 50, 52, 54, 100) for the creation of assemblies comprising at one active magnetic element of attraction (2, 3, 17, 23, 33, 34, 42, 47, 48) and a least one ferromagnetic element (6, 21, 22, 30, 40, 44) suitable for defining areas (... | 05/20/2003 |
| 6545579 | Device for retaining components made from a ferromagnetic material A device for holding components made of a ferromagnetic material that are arranged consecutively in a row and are held in place with one contact surface resting against at least two adjacent magnetic poles of opposite polarity, with the magnetic lines of ... | 04/08/2003 |
| 5887917 | Magnetic doorstop A magnetic doorstop including a first section consisting of a magnet secured with a retaining shim mounted on an elongated adjustment screw and a second section consisting of a magnet secured with a retaining shim mounted on an attachment screw. The first... | 03/30/1999 |
| 5853521 | Multi-cathode electron beam plasma etcher A multi-cathode electron beam plasma etcher is disclosed. The multi-cathode electron beam plasma etcher is comprised of: a vacuum chamber; several cathodes which are installed in the upper end of the upper part of the chamber and generates an electron bea... | 12/29/1998 |
| 5828281 | Rotary switch with low play A rotary switch adapted to be integrated into a push-to-start electrical control for a clothes dryer or the like employs a rotatable and axially translatable operator having an outwardly extending arm supporting a downward finger which travels across a pi... | 10/27/1998 |
| 5500631 | Magnetic socket holder A magnetic socket holder includes a molded plastic tray with a center bar having laminated keeper plates and bar magnets positioned therein to define pole pieces which permit the forming of magnetic circuits that when closed enhance the holding action of ... | 03/19/1996 |
| 5343181 | Magnetic socket holder A magnetic socket holder includes a molded plastic tray with a center bar having laminated keeper plates and bar magnets positioned therein to define pole pieces which permit the forming of magnetic circuits that when closed enhance the holding action of ... | 08/30/1994 |
| 5270678 | Magnetic rail chuck In the magnetic chuck disclosed herein, a pair of elongate pole members are arranged to provide magnetic contact with a workpiece along parallel lines and thus are somewhat in the nature of rails. Preferably, the ends of the poles are segmented and provid... | 12/14/1993 |
| 5266914 | Magnetic chuck assembly A magnetic chuck assembly comprises top and bottom plates separated by a layer of non-magnetizable material, each plate having magnetizable sections separated by strips of non-magnetic material. A rotor mounted between the top and bottom plates carries a ... | 11/30/1993 |
| 5076114 | Electromagnetic interlock A holding device for immobilizing a cable includes a generally cylindrical electromagnet with a central passageway extending therethrough and a holding assembly comprised of a ferromagnetic body joined to a tubular stem. The ferromagnetic body and stem ha... | 12/31/1991 |
| 5043662 | Method and apparatus for producing a uniform magnetic field in a test sample An apparatus for producing a uniform magnetic field in a test sample having an angled end during a magnetic particle test procedure, includes a conductive, angled fixture having a contact surface and an overall shape corresponding to that of the angled en... | 08/27/1991 |
| 4921292 | Magnetic attachment mechanism A magnetic attachment mechanism adapted for interfacing with the manipulator arm (11) of a remote manipulator system and comprising a pair of permanent magnets (31,32) of rare earth material which are arranged in a stator-rotor relationship. The rotor mag... | 05/01/1990 |
| 4837540 | Magnetic work-holder A magnetic holding device, comprising magnetically activable holding surface having pole members of different polarities, and at least a first and a second single-pole extension members for said pole members of opposite polarities. Each pole-extension mem... | 06/06/1989 |
| 4777463 | Magnetic fixture assembly A fixture for locating a workpiece in a precisely established position comprises a lower magnetic base and an upper fixture plate, the workpiece being fixtured on the plate. The base includes a permanent magnet which normally clamps the plate to the base ... | 10/11/1988 |
| 4728419 | Magnetic roll-type separator The invention provides a magnet roll for separation purposes which is made up of a number of axially disposed substantially cylindrical permanent magnets each of which constitutes a segment of the roll. Adjacent segment ends in the roll are of like polari... | 03/01/1988 |
| 4663602 | Magnetic chuck The magnetic chuck disclosed herein is of the permanent magnet type in which both a top plate and a shiftable pack comprise alternating major pole pieces and magnets, the pack being shiftable so that its magnets either aid or oppose the magnets in the top... | 05/05/1987 |
| 4575702 | Permanent magnetic chuck A permanent magnetic chuck in which a workpiece holding plate comprises a plurality of permanent magnets each with a magnetic isolator which are alternatively laminated, said magnetic pole pieces and said magnetic isolator are respectively constructed as ... | 03/11/1986 |
| 4484682 | Container with magnet for holding it in position A portable container for food and miscellany capable of protecting and preserving its contents in the rough handling environment of the construction worker. The container comprises an insulated hollow body with a compartmented, covered tray therein and a ... | 11/27/1984 |
| 4378547 | Electromagnet When an electromagnet (2) is employed to lift and turn a slab of steel, there is a risk that the slab is dropped, causing undesirable noise. Also, with a flat contact surface of the electromagnet, there is jerking of the apparatus. Improvement in both res... | 03/29/1983 |
| 4286245 | Magnetic rotary file Rotary magnetic file including a base having a bottom and two sides. A shaft is mounted between said sides and a magnet is rotatably mounted on the shaft. A pair of magnetic members are mounted on said shaft at each side of said magnet. A pair of spacer m... | 08/25/1981 |
| 4212249 | Dynamic-compensating magnetic support apparatus A magnet, a support arm for connecting the magnet to a load, and an adjusting mechanism for adjusting a magnitude of the field of the magnet in relation to variations in the load and method are disclosed.... | 07/15/1980 |
| 4075589 | Magnetic plate comprising permanent magnets and electropermanent magnets A magnetic plate or holder, especially for machine tools, of the type in which a magnetically attractable workpiece can be retained by magnetic force on the plate for a machining process, e.g. surface grinding, comprises a pole plate, a frame of soft magn... | 02/21/1978 |
| 4020436 | Lifting magnet for layered pipe The lifting magnet disclosed herein is adapted for lifting layered pipe. The pipe is engaged by a pair of elongate pole pieces which extend transversely to the length of the pipe, the pole pieces being energized by at least one coil disposed therebetween.... | 04/26/1977 |
| 4004262 | Electromagnet for providing balanced friction face pressures on an armature in a vehicle electric brake system An electromagnet for use in electric brakes and similar type clutches which will apply balanced friction face pressure against a rotating armature face despite the additional, externally imposed, pressures which are directed to its leading edge by tipping... | 01/18/1977 |
