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 |
| 7134725 | Motor vehicle seat A motor vehicle seat including a foldable backrest and a lowerable seat part, wherein the backrest is foldable toward the seat part and a mechanism is provided so the seat part is lowerable from a use position into a forward position, wherein a coupling element is p... | 11/14/2006 |
| 6341552 | Self-calibrating system and method for controlling a hydraulically operated device A self-calibrating method and system 10 for controlling a hydraulically operated device, such as a clutch actuator 24 in an automatic power transmission, provides a pressure switch 30 in the hydraulic circuit that provides feed-back to the controller 32 w... | 01/29/2002 |
| 4704946 | Fluid motor with rotary output A fluid motor for converting reciprocation of a piston within a cylinder to rotation by a crankshaft includes a valve for supplying a fluid to the cylinder and discharging the fluid therefrom. The valve comprises a rotary valve member rotatable with the c... | 11/10/1987 |
| 4638520 | Toothbrush capable of multidirectional brushing A toothbrush is provided with bristles to brush and clean the teeth. Since there are cavities between neighboring teeth it is useful to exercise a multidirectional brushing of the teeth and cavities. The handle of the tooth brush is therefor provided with... | 01/27/1987 |
| 4597321 | Rotary valve A rotary valve assembly for an internal combustion engine, the rotary valve assembly has a split housing which provides a cylindrical passage within which a valve rotor is located, surrounding the valve rotor is a sealing sleeve which is biased into seali... | 07/01/1986 |
| 4533377 | Neck ring mechanism for I.S. glass forming machine A neck ring mechanism for transferring a blank or parison from a blank mold section to a blow mold section of an I.S. glass forming machine includes a rock shaft and a pair of spaced cylinders reciprocable in opposition directions on the shaft. The rock s... | 08/06/1985 |
| 4488476 | Marker control valve A sequencing valve utilized with a tractor-propelled planter having two row arms which pivot downward to the ground in an alternating sequence as the planter changes directions in the field. The sequencing valve is connected with the conventional hydrauli... | 12/18/1984 |
| 4358991 | Hydraulic booster A hydraulic booster for a brake system or the like, of a vehicle includes a throttle valve which produces hydraulic pressure corresponding to the depression force applied to a brake pedal. Relative axial displacement of an operating rod and a power piston... | 11/16/1982 |
| 4350080 | Apparatus to pump multiple wells A pumping unit pumps two wells, simultaneously, to save energy and space, weight of one rod string offsetting weight of the other string.... | 09/21/1982 |
| 4317406 | Hydraulic cylinder for generating vibrations A hydraulic cylinder for generating vibrations which comprises: a cylinder body; a hollow piston rotatably mounted in said cylinder body; and a valve rotor rotatably engaged within said hollow piston, said valve rotor having a change-over valve portion ad... | 03/02/1982 |
| 4275642 | Air actuated fail-safe actuator encapsulated within accumulator tank A fail-safe, air actuated actuator mechanism is completely housed within and sealed interiorly of an accumulator tank in which a quantity of fail-safe actuating air is stored, under pressure.... | 06/30/1981 |
| 4232586 | Steering control valve for power booster steering mechanisms An otherwise conventional multi-way booster steering control rotary valve plug is provided with needle bearings at both ends of the grooved valve core, i.e., the rotary valve plug, in order to maintain it exactly centered radially within the coacting groo... | 11/11/1980 |
| 4211291 | Drill fluid powered hydraulic system A drill fluid powered hydraulic system used for driving a shaft connected to a drill bit is disclosed. The apparatus includes a hydraulic fluid powered motor actuated and controlled by hydraulic fluid. The hydraulic fluid is supplied to the hydraulic flui... | 07/08/1980 |
| 4178836 | Mechanical hydro servo valve A hydro mechanical condition-responsive servo control valve for controlling a variable condition, such as position or rate of change of position, of a remote element, comprises a rotary fluid valve controlled by a differential gear train arranged to regis... | 12/18/1979 |
| 4128380 | Fluid pressure actuated drive for the closing unit of an injection moulding machine A fluid pressure actuated drive for providing for the closing unit of an injection moulding machine a to and fro traversing motion of a movable part of the unit with little force and a clamping of the closed unit with a greater force. The device has at le... | 12/05/1978 |
| 4103591 | Device for a hydraulically driven percussion hammer Device for a hydraulically driven percussion hammer for activating a tool, comprising a differential piston with corresponding cylinder, where the piston's largest surface is closest to the percussion tool, and where the smallest working surface is in dir... | 08/01/1978 |
| 4092903 | Vibratory drive mechanism Opposed pivotally mounted tamper arms are oscillated by respective single-acting hyraulic piston assemblies controlled by separate hydraulic duplex rotary distributing valves. Fluid supply and return lines for each piston assembly are connected to a sourc... | 06/06/1978 |
| 4083290 | Pneumatic adjusting mechanism A pneumatic adjusting mechanism, especially for application in motor vehicles, which consists of a suction-air servo-motor that includes a working cylinder with a diaphragm piston whose piston rod is stressed by a spring against the action of the suction-... | 04/11/1978 |
| 3995530 | Shaking machine A shaking machine for shaking core sand out of hollow castings includes a pair of coaxial cylinders containing pistons with piston rods arranged to grip a casting, and a rotating vane air valve for supplying compressed air alternately to each of the two c... | 12/07/1976 |
