Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 7415758 | Device to press the shaft of a rotor into a stator housing A device to press a rotatably supported shaft of a rotor of a spindle motor for a hard disk drive into a shaft receiving portion of an associated stator housing by means of a first pressing tool acting on the rotor and a second pressing tool acting on the stator hou... | 08/26/2008 |
| 7397200 | Device for the control of fluorescent lamps in a lighting arrangement The invention relates to a device for the control of fluorescent lamps in a lighting arrangement that comprises at least one such fluorescent lamp, wherein for each fluorescent lamp the device has the following characteristics: a capacitive voltage divider consistin... | 07/08/2008 |
| 7305759 | Device for the manufacture of a shaft assembly for a hydrodynamic bearing In order to improve a device for the manufacture of a shaft assembly for a hydrodynamic bearing by pressing a shaft into a fit bore in a bearing disk, comprising a first pressing tool and a further pressing tool, in such a way that enables high accuracy to be achiev... | 12/11/2007 |
| 7197946 | Torque measuring device for electric motors and method to measure the torque of an electric motor A torque measuring device for electric motors having a rotor and a stator is proposed, said apparatus comprising a holding apparatus to hold the stator non-rotatably, an eddy current brake device which can be used to brake the rotor and a torque sensor connected to ... | 04/03/2007 |
| 7183688 | Stator for an electric motor A stator for an electric motor having a stator core which has a number of stator teeth and stator slots located between the stator teeth, the stator slots being designed to receive stator windings, the stator slots being given different depths in order to accommodat... | 02/27/2007 |
| 7165456 | Measuring method to determine the noise emission of an electric motor and measuring device A measuring method to determine the noise emission of an electric motor is proposed in which the vibrational excitation of the running electric motor is measured by a laser vibrometer device and this measured vibrational excitation is correlated with a noise level. | 01/23/2007 |
| 7161410 | Switching circuit for producing an adjustable output characteristic The invention relates to a circuit to generate an output characteristic, having a constant voltage control circuit which receives a voltage supply and generates a constant output voltage; a current reduction section, which receives a control voltage and, depending o... | 01/09/2007 |
| 7127795 | Rotor assembly and method for making the rotor assembly A rotor assembly and method for making the rotor assembly in which a cylindrical magnet which is magnetized in an axial direction is coupled with a rotary shaft and the magnet is clamped with rotor stacks formed by laminating annular magnetic plates, the surfaces of... | 10/31/2006 |
| 7115894 | Method to determine the lubricant filling degree of a fluid dynamic bearing In order to improve a method to determine the lubricant filling degree of a fluid bearing in which the bearing gap of the fluid bearing is illuminated and the luminous reflectance is analyzed so that the filling degree can be determined in a simple and reproducible ... | 10/03/2006 |
| 7105961 | Lead terminal structure of resolver A lead-wire-fixing attachment for fixing a lead wire is provided in a lead-wire-fixed portion arranged in a stator core, and a lead wire is connected to a stator-winding mounting board by way of a through-hole provided at the upper end of the lead-wire-fixing attach... | 09/12/2006 |
| 7089806 | Device and method for measuring torque on an electric motor A device for measuring torque on an electric motor, which has a first motor portion and a second motor portion, which are rotatable in relation to each other, is proposed, the device comprising a rotatable holding plate for receiving the first motor portion, by mean... | 08/15/2006 |
| 7057317 | Electric motor In order in the case of an electric motor, in particular a brushless electric motor, comprising a rotor, a stator, a motor housing receiving the rotor and the stator, a first bearing, disposed on the motor housing, and a second bearing, disposed opposite the first b... | 06/06/2006 |
| 7044003 | Torque measuring device for electric motors A torque measuring device for electric motors comprising a stator and a rotor is disclosed in which a holding apparatus to hold the stator of a test electric motor is provided, a drive apparatus for the rotor is provided and a torque sensor that is coupled to the dr... | 05/16/2006 |
| 6986606 | Ball bearing and lubricating method thereof The churning type of grease of a viscosity of 15–20 mm2/s and a worked penetration of 200˜230 is disposed at the rolling surface of the race portions and the channeling type of grease of 25˜35 mm2/s and a worked penetration of 240˜270 is d... | 01/17/2006 |
| 6965179 | Electric motor In order, in an electric motor having a housing including a housing sleeve and a housing cover disposed at the end of the housing sleeve, a rotor mounted rotatably about a rotor axis in the housing, a stator disposed in the housing and having a least one motor windi... | 11/15/2005 |
| 6917231 | Pulse width modulation circuit and illuminating device incorporating same In a pulse width modulation circuit, which generates an output whose pulse width is modulated by controlling a duty ratio of an oscillation circuit adapted to generate an oscillation at a frequency determined by a resistor and a capacitor to be electrically charged ... | 07/12/2005 |
| 6890105 | Radial ball bearing retainer A deep channel type of radial ball bearing having a retainer. The bearing has an outer ring and an inner ring. Running channels are formed on the mutually opposing orbiting surfaces of the outer ring and inner ring. A specified number of balls are fit into the runni... | 05/10/2005 |
| 6849973 | Stepping motor A stepping motor has a cylindrical case that houses a motor stator and a sensor stator. The motor stator and the sensor stator are located at the opposing ends of the case. A motor rotor and a sensor rotor are mounted on a shaft and face the motor stator and the sen... | 02/01/2005 |
| 6787075 | Method of making synthetic resin composition with lubricative underwater properties containing RBC or CRBC fine powder A method of making a low friction bearing for use when immersed in a liquid particularly water is provided comprising a synthetic resin composition which includes powders of a rice bran ceramic, carbon rice bran ceramic or both which are uniformly dispersed in a syn... | 09/07/2004 |
| 6752506 | Spread illuminating apparatus with light reflection member There is provided a spread illuminating apparatus to make effective utilization of light emitted from a light source. A light reflection plate is provided along and close to a side surface of a light conductive member opposite to a side surface facing a transparent ... | 06/22/2004 |
| 6734590 | Motor A motor that can prevent damages on the fluid dynamic bearing. A ball is press-fitted into the end surface of the shaft body, and the ball is disposed in such a manner that the tip portion of the ball comes to the higher position with respect to the end surface of t... | 05/11/2004 |
| 6729764 | Metal bearing liner and axial flow fan motor provided with the same A metal bearing liner is formed by deep drawing press process sequentially subjecting a progressive sheet material (roll material) to a plurality of press processes. This makes it possible to form a metal bearing liner by a press work instead of a cutting work that ... | 05/04/2004 |
| 6690257 | Common mode choke coil A common mode choke coil is described that is capable of providing improved characteristics at high frequencies. A bobbin having a toroidal core is mounted on a base. One coil is wound around one half of the bobbin and another coil is wound around the oth... | 02/10/2004 |
| 6680000 | Polyamide plastic magnetic material and magnet made of same A polyamide plastic magnetic material excellent in fluidity is provided, and a plastic magnet made of the same is highly flexible with no deterioration in strength and does not crack during fabrication. The polyamide plastic magnetic material consists of:... | 01/20/2004 |
| 6652033 | Footrest unit for passenger seat A leg rest and a seat back are rotatably mounted at the front and rear of a seat cushion of a passenger seat respectively, and a footrest is mounted on the leg rest in such a manner that it can be extended and retracted. Adjustment of the angle of the sea... | 11/25/2003 |
| 6643094 | Magnetic head device including a guide recess for guiding lead wires A magnetic head device is provided which can guide lead wires without increasing its dimension. A guide recess having a depth of 0.1 to 0.5 mm is formed in an end face of a terminal block, so that the lead wires can pass therethrough for connection to ter... | 11/04/2003 |
| 6641275 | Spread illuminating apparatus There is provided a spread illuminating apparatus to improve a coupling efficiency between a light conductive member and a spot-like light source. A claw (23) of an upper frame (21) is fitted to a recess (20) of an LED (6), and generates a spring force in... | 11/04/2003 |
| 6624973 | Magnetic head for floppy disk drive and hard disk drive A magnetic head that is excellently adapted to a magnetic core reduced in thickness. When a magnetic core which is reduced in thickness for adaptation to a high recording density is inserted in an opening of a size conventionally formed in a magnetic head... | 09/23/2003 |
| 6616316 | Spread illuminating apparatus with frame A spread illuminating apparatus combined with a liquid crystal display via a frame has a reduced thickness as a whole, thereby realizing a natural liquid crystal display image. A light conductive plate has its peripheral portion fitted in a groove of the ... | 09/09/2003 |
| 6590694 | Faraday rotator A Faraday rotator is provided which obtains excellent optical characteristics with a small number of layers. In the Faraday rotator, a metal reflective film is formed on a substrate, then a first periodic dielectric multilayer film made of silicon dioxide... | 07/08/2003 |
| 6565259 | Rolling bearing with reinforcing member The present invention provides a rolling bearing that prevents retainer noise and NRRO deterioration thereof by imparting strength and rigidity to a retainer so as to prevent it from being deformed by force from rolling elements and sliding friction. An a... | 05/20/2003 |
| 6561662 | Spread illuminating apparatus There is provided a spread illuminating apparatus aiming to minimize the coverage of a liquid crystal screen while securely integrating a light conductive member with a transparent substrate. The light conductive member is wedge-shaped in which the width ... | 05/13/2003 |
| 6545795 | Magneto-optical member and optical isolator using the same The present invention provides a magneto-optical member capable of ensuring an excellent light transmittance and an optical isolator using the same. A first one-dimensional magnetic photonic crystal having a magneto-optical thin film, and a second one-dim... | 04/08/2003 |
| 6527447 | Sliding of polycrystallized glass The inner ring 2 and the outer ring 3 of the roller bearing 1 as element are formed with silicate glass such as a high silicate glass, a soda-lime glass, alminosilicate glass, borosilicate glass and an alkali silicate glass, during its manufacturing proce... | 03/04/2003 |
| 6456182 | Common mode choke coil In a common mode choke coil, a closed magnetic circuit core (2) is divided in parallel with its magnetic circuit, and formed by superimposing together for integration a first divided magnetic core (2a), a second divided magnetic core (2b) and a third divi... | 09/24/2002 |
| 6449130 | Head stack assembly enabling independent control of a position of magnetic heads for access to different magnetic disks and support method thereof A hard disk drive is made small in size, large in storage capacity and high in data reading/writing speed. Two actuator blocks (3) are fixed to a sleeve 16A of a first pivot and sleeve (16B) of a second pivot, respectively. Position of magnetic heads to b... | 09/10/2002 |
| 6440323 | Mn-Zn ferrite and production process thereof This invention provides a Mn--Zn ferrite which has a high electrical resistance and can sufficiently satisfy the use in a high frequency region exceeding 1 MHz. This invention further provides a production process of the Mn--Zn ferrite in which mixed powd... | 08/27/2002 |
| 6375336 | Spread illumination apparatus The invention describes a light reflection pattern to spread the volume of the emitted light from a bar-like light source with a plurality of grooves provided along a transparent substrate and plane portions adjacent to the grooves. By setting the incline... | 04/23/2002 |
| 6343867 | Spread illuminating apparatus At one end of the spread body 1, two light conductive members 2A, 2B on one part of which optical path conversion means 4 are formed are disposed in line with the spread body 1 and each optical path conversion means 4 of the light conductive members 2A, 2... | 02/05/2002 |
| 6265361 | Bearing grease composition for motor A grease composition with which low torque property, low noise property and low volatilization property can be maintained, is provided. The grease composition is characterized in that it contains: (A) an alkali metal salts and/or an alkaline earth metal salt s... | 07/24/2001 |
