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 |
| 4388754 | Skid protection device for wheels The present invention relates to a skid protections device (3) for wheels preferably snow chains for vehicle wheels. In order to permit quick and simple assembly of snow chains on vehicle wheels the device according to the invention comprises a power aggr... | 06/21/1983 |
| 4358052 | Hot-water central heating system A hot water central heating system with a conduit system conducting a water flow and comprising intercommunicating pipes which intersect in decks and substantially fills the cross-section of the combustion chamber of a boiler and offers a large flow resis... | 11/09/1982 |
| 4354411 | Cold shears and method for cutting billets and bars The shears have a lower blade and an upper blade. The upper blade is reciprocated with respect to the lower blade through a transmission. The transmission includes a first eccentric which is continuously rotated to continuously reciprocate the upper blade... | 10/19/1982 |
| 4353286 | Hydraulic control system with a pipeline antiburst safety device for a double acting drive cylinder A hydraulic control system with a pipeline antiburst safety device for a double acting drive cylinder, more particularly for adjusting and securing the position of a driven guide roller in the strand guide of a continuous casting plant which exerts an ope... | 10/12/1982 |
| 4351359 | Fast closing valve for gaseous and liquid media A fast closing valve for gaseous and liquid medium closes, against a resilient force, upon the occurrence of a sudden pressure difference in the conduit, specially aeration conduits for use in anti-aircraft protection shelters. The main part is a valve-fl... | 09/28/1982 |
| 4350305 | Micro-mill-mixer The invention relates to a micro-mill-mixer for treating in an enclosure particles carried in a fluid, the mixer comprising an accelerator to propel the particles onto an abrasive disk to produce intense splitting, slicing and particle shearing as well as... | 09/21/1982 |
| 4345741 | Driving pulley mechanism The mechanism comprises at least one driving pulley comprising of two parts which are each provided with one part of a cable groove, which groove has a relatively great output transmission capacity. The parts are pressed toward each other by pressing devi... | 08/24/1982 |
| 4342358 | Continuous casting installation In a continuous casting installation, screw-less fixing of the roller guide segment frames to the bed is achieved by means of a plurality of traction rods which can be subjected to traction force by hydraulic means. Each traction rod has a nut thereon whi... | 08/03/1982 |
| 4333370 | Method and plant for slitting a hot slab emerging from a continuous casting plant A plant for slitting a hot slab, emerging from a continuous casting machine, by means of band sawing machines of which two or more are guided in the serial direction of the slab and are slidably guided transversely to the slab feed direction so that saw c... | 06/08/1982 |
| 4324222 | Vibration dampened for archery bow A mono-stabilizer for sport bows having a sleeve 5 is mounted on one end of a tube 7 and is provided with a screw bolt. On the other end of the tube 7 a terminal piece 8 is mounted which is provided with a self-cutting threading 9. This arrangement consti... | 04/13/1982 |
| 4318533 | Apparatus for maintaining tension on a tension cable An apparatus for maintaining tension on a tension cable which is wound on the drum of a winch and connected at one end to a position varying object, especially for maintaining the tension of a power cable leading to a travelling coal extraction machine. T... | 03/09/1982 |
| 4316553 | Automatic lottery ticket vending machine Improvements in automatic lottery ticket vending machines adapted upon lottery ticket purchase to dispense one or a definite number of tickets at a time from an externally inaccessible portion of the interior of the vending machine. For the purpose of fac... | 02/23/1982 |
| 4314772 | Ground heating system A ground heating system comprises a porous stabilization layer provided between a pipe system for supplying heat and a pipe system for supplying water to control the ground humidity. The stabilization layer functions as a water distributor and heat storag... | 02/09/1982 |
| 4312209 | Method for operating a strip rolling mill A method for the operation of rolling mills, which rolls are guided by means of chocks with clearance in the window openings of the uprights. Prior to the appearance of rolling force the chocks (3) are thrust laterally and against their guide surfaces in ... | 01/26/1982 |
| 4304346 | Strip-withdrawal device for metal ribbons to be wound A strip-withdrawal device for producing back tension in a plurality of metal ribbons to be wound, with at least one travelling-wave linear motor for producing the back tension, the linear motor being subject to preliminary bending against the bending forc... | 12/08/1981 |
| 4272919 | Seed carrier and method of producing same The present invention relates to seed carriers which are preferably in the form of seed-containing sheets to be laid out on the ground. The seed carriers are produced continuously on a large scale by the utilization of forming wire machines commonly used ... | 06/16/1981 |
| 4261561 | Walking support The present invention relates to a walking support having a wheeled frame with upright supports and handles for the user of the walking support mounted thereon, whereby the rear wheels of the frame are mounted on lateral members which are pivotally connec... | 04/14/1981 |
| 4261826 | Magnet cleaning device Magnetic filter apparatus with a plurality of magnetic bars, carried on endless conveyor chains through a container for contaminated liquid, having for the cleaning of said magnetic bars a device which is positioned outside the liquid above the fluid cont... | 04/14/1981 |
| 4261725 | Method of producing a fibrous mass from peat and means for carrying out the method The present invention relates to a method for producing a fibrous mass from peat, in which, after a primary sorting operation, the peat-material suspension is liquid-concentration regulated by supplying thereto an amount of liquid depending on the degree ... | 04/14/1981 |
| 4254516 | Bath tubs A bath tub, particularly for use by patients and old people, has a foot-rest 10 and back-rest 11 for partitioning its bathing space 7, and hand grips 12. The foot-rest 10 and the hand grips 12 are disposed within the bath tub 1 inside the outer rim 9 of t... | 03/10/1981 |
| 4254941 | Automatic anti-fall device for manual or motorized lifting systems The device is adapted to be used in a manual or motorized lifting system comprises a self-tightening jaw-block which normally lets a lifting or an auxiliary cable pass through it, whereby a releasing device, by an excessive speed of the cable relatively... | 03/10/1981 |
| 4250731 | Method for producing trimming dies A method of producing trimming dies with a conical many-sided bore for use in a screw trimming press. A trimming die blank is produced with an outer diameter corresponding to the inner diameter of a cup-shaped holder and to a finished height and with a cy... | 02/17/1981 |
| 4251180 | Roll-changing apparatus A travelling gantry is used for exchanging the working rolls of roll stands. A carriage is mounted on a cross member of the gantry and a roll extraction device with roll receiving rotatable sleeves therein is suspended from the carriage in a vertically ad... | 02/17/1981 |
| 4248550 | Pile extraction apparatus Pile extraction apparatus having a clamping device for clamping engagement with a pile. The device is suspended from a section of casing pipe by way of a universal joint. In this way the extraction apparatus may be raised and lowered by a commercially ava... | 02/03/1981 |
| 4246290 | Process for manufacturing waffle blocks A process and apparatus for manufacturing waffle blocks filled with cream are disclosed. Individual waffle sheets are moved on a feeder belt into contact with a coating device for coating on one side and are introduced subsequently into a stacking device ... | 01/20/1981 |
| 4241598 | Method for producing a cross-slotted heading die A method and apparatus are provided for producing a cross-slotted die for forming cross-slotted screw heads. One end face of a cylindrical blank is turned to form a cone having a cone angle of between 124° and 140°. The cross shape is produced in this f... | 12/30/1980 |
| 4217950 | Continuous casting apparatus Continuous casting apparatus includes opposing sets of rollers defining a guide path for a cast section emanating from a mould outlet. A key-piece is keyed to the leading end of the cast section at the mould outlet in a conventional manner. A detachment m... | 08/19/1980 |
| 4218159 | Multiple-part hobbing cutter The body of a gear hob consists of a plurality of adjacent disc-shaped segments. A helix of successive cutting teeth extends around the body and is formed by the adjoining peripheries of the segments. First and second metal cutter plates are replaceably m... | 08/19/1980 |
| 4214712 | Micro-mill-mixer The invention relates to a micro-mill-mixer for treating in an enclosure particles carried in a fluid, the mixer comprising an accelerator to propel the particles onto an abrasive disk to produce intense splitting, slicing and particle shearing as well as... | 07/29/1980 |
| 4209403 | Magnetic filter apparatus Magnetic filter apparatus includes a liquid container, an inlet for liquid contaminated by magnetizable material, an outlet for purified liquid and a wall of magnetic bars disposed between the inlet and the outlet and having gaps therebetween for the pass... | 06/24/1980 |
| 4204449 | Flying cropping shears for hot strip Flying cropping shears for hot strip for two horizontally spaced pairs of cutters. The cutters are driven by parallel crank drives through connecting members which maintain parallelism of the cutters. Means are provided for selectively bringing the pairs ... | 05/27/1980 |
| 4202416 | Method and apparatus for sinking a cased borehole for producing cased pile foundations Method for sinking a cased borehole for producing cased pile foundations. The method uses an apparatus comprising a crane, a drilling appliance capable of being lowered into the borehole and a tube extraction machine with double-acting lifting cylinders f... | 05/13/1980 |
| 4199084 | Foundry ladle support device having guides for ladle placement Supporting apparatus for a foundry ladle has a vertical support member on which are rotatably mounted a number of horizontal support members. A ladle carrier is provided at the outer end of each horizontal support member. The carrier comprises spaced para... | 04/22/1980 |
| 4195050 | Method for making a filter Method for making a filter which comprises a plurality of closely juxtaposed tubes made of a filter material and packed tightly in a tubular envelope. Both ends of the tubes are initially closed. The envelope with the tubes is then dipped to a small depth... | 03/25/1980 |
| 4193462 | Rotary boring head A rotary boring head for earth and rock formations with pivotal wings which may be swung radially outwardly and which are provided with inclined return rails. Upon upward movement of the rotary boring head the earth mass presses upon the inclined return r... | 03/18/1980 |
| 4193311 | Driving pulley mechanism A driving pulley mechanism comprises at least one driving pulley consisting of two parts which are provided each with one part of a cable groove having a relatively great capacity of output transmission and are pressed toward each other by pressing device... | 03/18/1980 |
| 4169379 | Temperature measuring device for non-contacting temperature measurement A temperature measuring device for non-contacting temperature measurement includes a radiation pyrometer, located in a pressure-resistant housing. Power cables connect with said housing through pressure-resistant openings. The wall of the housing located ... | 10/02/1979 |
| 4161885 | Measuring apparatus for measuring the roll gap in gauge-controlled roll stands Apparatus is provided for measuring the roll gap in roll stands with automatic gap control. The apparatus comprises two relatively movable components which may interfit telescopically. The two components have respective measuring surfaces at one of which ... | 07/24/1979 |
| 4161115 | Apparatus for monitoring hydraulic plant for leakages Apparatus is provided for detecting leakages in hydraulic equipment. A pressure supply line of the equipment has alternate fluid flow paths controlled by respective, oppositely directed non-return or one-way valves which are pre-loaded as by springs. A re... | 07/17/1979 |
| 4154459 | Top surface edges for a ski of plastic material The top surface edges for a ski of plastic material with a foam material core are produced by first placing the structural parts of the ski in position in a mold and thereafter filling the hollow spaces in the closed mold with an expandable synthetic foam... | 05/15/1979 |
