Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 4896582 | Method for reducing the piston speed, especially in the piston and cylinder assemblies of an excavating machine, and device for carrying out the method The invention relates to a method and a device for reducing the piston speed in a piston and cylinder assembly (1), as the piston approaches the end position. The piston end position is sensed, and a signal is generated for starting the end position dampe... | 01/30/1990 |
| 4779591 | Device for engine speed setting in a working machine A device for setting the speed of, in particular, an excavator engine which is to operate at a speed adapted to the type of work to be done and is automatically shifted to resting speed when no work is done. In this manner, fuel consumption and the distur... | 10/25/1988 |
| 4533899 | Joystick controller with improved motion control with plate having bevelled flat edges that correspond to planes of maneuverability A control lever is distinctly movable in different planes for actuation of different control means. The control lever has, adjacent a control lever housing, a plate provided with a number of bevelled flat edges corresponding to the number of planes in whi... | 08/06/1985 |
| 4475333 | Devices for limiting the power output of a hydraulic assembly To limit the power output of a hydraulic assembly consisting of plural driven hydraulic motors, hydraulic pumps driving said motors, a single pump driving motor and control means for controlling the hydraulic flow to said drive hydraulic motors, a control... | 10/09/1984 |
| 4350078 | Apparatus for restricting the velocity of a hydraulic piston in its end positions An apparatus for restricting the velocity of movement of the piston of a servo-controlled operating hydraulic unit, when the piston approaches at least its one end position in the cylinder, by means of a hydraulic sensor fixedly mounted on one of the mach... | 09/21/1982 |
| 4207740 | Valve blocks, in particular for hydraulic excavators A valve block for hydraulic excavators having at least two sets of valves which are each coupled to their pump. The valves are of the type which, in the unactuated state, allows the passage of pressure medium. The hydraulic devices for executing working m... | 06/17/1980 |
| 4044610 | Excavators Measurement devices are provided on the boom and stick of an excavator and are diposed to measure, by means of the gravitational force, the angle of the boom and the stick, respectively, relative to the horizontal plane. These measurement values are appli... | 08/30/1977 |
| 3982508 | Speed regulators for internal combustion engines, particularly diesel engines, in earth movers and workers A speed regulator for an engine of an earth mover and worker, particularly a diesel engine of an excavator, said speed regulator including an operating member which comprises a piston and cylinder unit and is connected into the linkage between the fuel su... | 09/28/1976 |
