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 |
| 7370551 | Gearshift operating device To provide a small-sized and lightweight gearshift operating device that is capable of performing a gearshift operation in a short time at low power consumption, a guide slit having a plurality of slits 41 parallel with the shift fork shafts and a plurality o... | 05/13/2008 |
| 7042187 | Control apparatus for electric actuator A driver for an electric actuator comprises a direction-switching means which switches a direction of rotation of a rotary driving source based on a direction instruction input signal, a current amplifier/limiter which converts a voltage outputted from the direction... | 05/09/2006 |
| 7037236 | Hydraulic transmission vehicle A hydraulic transmission (21) has an electric actuator (86) for changing its output/input rotation speed ratio. A controller 90 of the actuator memorizes a command current value to the actuator supposing that load is not applied on the hydraulic... | 05/02/2006 |
| 6539710 | Hydrostatic steering system having improved steering sensing A hydrostatic steering system of the type including a fluid controller (21) for controlling the flow of fluid from a source (11) to a steering actuator (19) in response to movement of a steering wheel (W). The controller (21) is of the type having a fluid... | 04/01/2003 |
| 6378411 | Working equipment and a control system therefor Operating side link members corresponding to working side link members of a working device are provided in a device for operating working equipment. Rotation of the working side link members is detected by a rotation sensor. A motor is driven in response ... | 04/30/2002 |
| 5097744 | Hydraulic control system A hydraulic control system is provided for regulating the slew rate of a servovalve driven actuator within design parameters despite widely varying load conditions. The servovale flow is maintained constant in accord with the integration of the difference... | 03/24/1992 |
| 5035113 | Electropneumatic remote control for shifting the mechanical transmission of a motor vehicle A remote control shifting system for a mechanical transmission. The transmission is operated by two pneumatic cylinders, a selecting cylinder operating in the direction of shift path selection and a shifting cylinder acting in the direction of shifting. T... | 07/30/1991 |
| 4800723 | Electrically-driven opposed flexible bellows pump and position-controlled opposed flexible bellows jack system A flexible bellows connecting device which positions an output member has a pair of jacks (1,2) equipped with deformation sensors (12,13). A pair of variable capacity bellows pump reservoirs (3,4) permit predetermined motion of the jacks. An electric moto... | 01/31/1989 |
| 4793137 | Control system A control system for airships and the like that incorporates optically encoded control signals and a compressed fluid power source to power a remote control station to decrease the susceptibility of the control system to uninterruption or disablement due ... | 12/27/1988 |
| 4731996 | Position transmitter for a pneumatic-pneumatic or electro-pneumatic converter A position transmitter which can be incorporated in a pneumatic-pneumatic or electro-pneumatic converter, and which readily provides for calibration between a zero position and a maximum position of a device to be actuated by the converter. The invention ... | 03/22/1988 |
| 4706456 | Method and apparatus for controlling hydraulic systems A control system is provided for a hydraulic actuating system having a multi-phase stepping motor with a driver therefor which supplies and controls DC current through each of the motor windings such that no current is induced into the control winding fro... | 11/17/1987 |
| 4696163 | Control valve and hydraulic system employing same The valve disclosed herein functions as a flow matching device. By employing such a valve, hydraulic systems may be implemented in which filling and emptying of a variable volume load, such as a hydraulic piston, may be accomplished through simple check v... | 09/29/1987 |
| 4680929 | Swivelling working vehicle A working vehicle having a working device mounted on a swivel base rotated by a hydraulic motor. There is provided a control system which causes the swivel base to start and stop smoothly at highest possible standard speeds which are preset for an entire ... | 07/21/1987 |
| 4667472 | Electric integrated actuator with variable gain hydraulic output This invention relates to integrated electro-hydraulic actuators for use aboard aircraft or elsewhere. A balanced, double-acting hydraulic ram or motor (12) is connected between a support (16) and a member to be moved relative to the support. The ram incl... | 05/26/1987 |
| 4655689 | Electronic control system for a variable displacement pump An electronic control system for a variable displacement pump comprises apparatus for sensing the actual position of the displacement determinative element and the actual rotational speed of the pump cylinder block, and for producing representative signal... | 04/07/1987 |
| 4625513 | Controlled flow hydraulic system In the hydraulic system disclosed herein, a flow matching device is employed to implement a system in which filling, emptying and holding of a variable volume load, such as a hydraulic piston, may be accomplished at controlled flow rate by a hydraulic cir... | 12/02/1986 |
| 4590764 | All-digital electrically powered servo This disclosure pertains to a completely digital, electrically powered servo wherein the servo actuator is minutely incremented at a frequency proportional to the magnitude of an error binary number. The binary error is derived from the difference of a bi... | 05/27/1986 |
| 4587808 | Control system for hydraulic circuit means A control system for a hydraulic circuit having a variable displacement hydraulic pump, and an actuator driven by the pump, in which a pump control controls a displacement volume varying member of the pump based on an operating signal giving a command wit... | 05/13/1986 |
| 4542802 | Engine and transmission control system for combines and the like A control system is provided for a combine or other vehicle having an engine for driving both the ground wheels of the vehicle and at least one auxiliary mechanism, such as the crop-processing mechanisms of a combine. The engine is coupled to the ground w... | 09/24/1985 |
| 4537029 | Power transmission An electrohydraulic control system which includes first and second electrically controlled fully variable hydraulic pumps adapted to be driven by the vehicle engine. In the specific embodiment of the invention herein disclosed, the first pump is coupled t... | 08/27/1985 |
| 4494911 | Piston pump servo control An electronic closed loop piston pump servo control system including a swash plate within the pump housing which controls pump output as a function of its position about a rotational axis, means for altering the position of said swash plate, means for pro... | 01/22/1985 |
| 4489551 | Failure detection system for hydraulic pump A failure detection system for a hydraulic pump (1) having a displacement volume varying device (1a) and connected to at least one hydraulic actuator (4) to constitute a hydraulic circuit for driving the hydraulic actuator. The system includes means (7a, ... | 12/25/1984 |
| 4489552 | Automatic neutral point detecting system for hydraulic pump An automatic neutral point detecting system for a hydraulic pump equipped with a displacement varying device capable of shifting both in a (+) direction and in a (-) direction and connected to at least one hydraulic actuator to form a hydraulic circuit to... | 12/25/1984 |
| 4461147 | Variable displacement hydraulic control with override In the preferred form, the invention disclosed herein provides a single servo control valve to modulate the flow of control fluid to a servo mechanism of a variable displacement pump wherein the single valve is provided with both a manual primary input an... | 07/24/1984 |
| 4412500 | Drive mechanism for ships or the like comprising a main propeller and an auxiliary mechanism A drive mechanism for ships or the like having at least one main propeller or the like drivable by at least one main motor and further having at least one drivable auxiliary mechanism, for example a maneuvering propeller. An energy producer is drivable by... | 11/01/1983 |
| 4370856 | Control method for winch of mining machinery An arrangement is described for controlling a winch used in mining machinery, wherein the direction of operating a winch and speed thereof are controlled by changing the position of a control element of a fluid pump for supplying a fluid into a fluid pres... | 02/01/1983 |
| 4194361 | Electro-mechanical control system for hydraulic displacement pumps, such as swash plate or eccenter pumps To permit mechanical override of an electrical command system to control deflection of the swash plate or eccentricity of an axial or radial piston pump, for example upon failure of the electrical control system, a group of valves 5-8 are connected to an ... | 03/25/1980 |
