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 |
| 4239568 | Method of manufacturing a ball A method of manufacturing a ball for use in volleyball or soccer includes the steps of manufacturing a spherical hollow body of a brittle material, sticking cloth strips in an overlapping manner on the spherical hollow body to provide a bag body, cutting ... | 12/16/1980 |
| 4230298 | Apparatus for the preparation of hollow plastic articles Apparatus for the preparation of hollow plastic articles wherein a more rapid operating cycle is obtained with less effect upon the temperature of the parison. The apparatus includes a first core, means for providing a parison thereon, a temperature contr... | 10/28/1980 |
| 4224265 | Tank, particularly oil tank A hollow tank is formed by placing a hollow glass fiber reinforced inner container within a hollow rigid form comprising pieces assembled around the inner container and spaced from it to leave an air gap between the inner container and the inner wall of t... | 09/23/1980 |
| 4206899 | Apparatus for molded ice sculpture A method and apparatus for forming molded ice sculptures includes a selection of molds fabricated of form retaining, flexible, resilient plastic material. Each mold includes holes in the base thereof through which supporting wires are placed. The mold is ... | 06/10/1980 |
| 4202856 | Graphite-epoxy molding method A novel method is disclosed for the manufacture of a hollow graphite-epoxy structural part with high composite density and using tooling that eliminates the necessity of autoclave and similar high external pressure curing equipment. The method of manufact... | 05/13/1980 |
| 4187271 | Method of making same Method of making a casing reinforced by a stretchable glass fiber preform is disclosed. The casing may be reinforced by metal or a glass fiber mat which is shaped to provide positive engagement with the stretchable fiber preform before its impregnation by... | 02/05/1980 |
| 4183776 | Tennis racket manufacture A tennis racket frame is constructed primarily of an elongated hollow tube member having a wall thereof consisting essentially of a plurality of concentric layers of high tensile strength fibers impregnated and bonded together by binder resin, at least tw... | 01/15/1980 |
| 4183124 | Method of and apparatus for fabricating spiral wrapped cartridge cases Method of and apparatus for fabricating spiral wrapped cartridge cases or the like, in which an expandable bladder positioned within the interior of the cartridge case is initially expanded by application of hydraulic fluid at relatively low hydraulic pre... | 01/15/1980 |
| 4178344 | Method and apparatus for reversing and flattening a driver's restraint cushion Method and apparatus for reversing and flattening a driver's restraint cushion composed of a pair of overlapping sheets. The apparatus includes a loading platform having an aperture therein of a size generally corresponding to the size of a circular openi... | 12/11/1979 |
| 4169749 | Method of making a hollow airfoil A method of making hollow aircraft rotor blades from laminated material. An xpandable mandrel is first made from curable materials and then a composite build-up of epoxy material is made by layering a plurality of prepreg plies of curable material over the... | 10/02/1979 |
| 4158691 | Method for pressing articles such as plates from pulverulent porcelain composition A device is disclosed for forming blanks from pulverulent porcelain mater which blanks have a foot piece and sloping sides. The device has an upper mould which acts against a lower mould, the upper face of which lower mould is formed by a distendable, el... | 06/19/1979 |
| 4155967 | Building structure and method of making same A building structure and method of making the same are disclosed wherein an inflatable form is inflated and an insulation layer of urethane form is applied to the undersurface of the foam. Hanger members are secured to the foam layer by adhesively affixin... | 05/22/1979 |
| 4153656 | Pipe joints A method of joining pipes in which a sleeve is placed over the adjacent ends of the pipes so as to overlap each pipe. The sleeve fits with clearance around the pipe ends. The ends of the clearance space are closed by inflating hollow sealing rings and the... | 05/08/1979 |
| 4148597 | Apparatus and method for pressure molding composite structural parts An apparatus and method for molding structural parts from fiber reinforced plastic composite. The apparatus is comprised of a rigid container, one or more pads of silicone rubber housed inside the container to exert pressure on the part, and one or more e... | 04/10/1979 |
| 4144632 | Method of making tubular article A one-step method of both making and tortuously shaping three component tubular articles is disclosed, the tubular articles being of the hollow skin-core type of the desired complex configuration, strong and rigid, free from porosity, light in weight, res... | 03/20/1979 |
| 4132577 | Process for producing hollow profiled structures, and structures produced thereby In making a hard multi-tubular structure, one starts with a flat woven or knitted hose fabric comprising a plurality of side-by-side hoses; the hoses of the fabric are caused to expand and to set in their expanded configurations, which may be circular or ... | 01/02/1979 |
| 4126659 | Method of making a hollow article The invention relates to a method and apparatus for making hollow, resin-impregnated fibrous fabric articles. Specifically, it relates to a method wherein a reusable mandrel is made sufficiently rigid to receive a lay-up of the article to be manufactured.... | 11/21/1978 |
| 4124678 | Method of making tortuous tubular articles Method for making tubular articles of tortuous configuration and of resin impregnated material. The method is intended to avoid resin-starved areas in the product. Specifically, tubular articles having high curvature, sharp transitions in cross section si... | 11/07/1978 |
| 4119695 | Method and apparatus for forming hollow concrete elements A method and a device to cast elongate concrete structural members formed internally with channel means in horizontal moulds. The channel means is formed by a double-wall inflatable hose of an elastic and flexible material which is introduced into the mou... | 10/10/1978 |
| 4113828 | Method for making flexible corrugated rubber tubing and tubing produced thereby A method and apparatus for making flexible rubber tubing with axially spaced annular or helical corrugations. A sleeve of uncured vulcanizable rubber is slipped over a forming mandrel and an external form comprising a length of flexible, corrugated, axial... | 09/12/1978 |
| 4113825 | Method of sealing the ends of an elastomeric roll In a fuser roll for electrostatic copying machines comprising a cylindrical metal core surrounded by a cylindrical body of elastomeric material having an outside cylindrical sleeve of protective material, the end surfaces of the elastomeric material are p... | 09/12/1978 |
| 4102956 | Building method and equipment for use therewith A building method of the kind wherein an inflatable former, made of a flexible, substantially inextensible material is sealingly anchored to a base and is inflated to a predetermined pressure and, while maintaining said pressure substantially constant, a ... | 07/25/1978 |
| 4097977 | Method to attach the center electrode into a ceramic insulator body of spark plugs To permit simple manufacture and reliable attachment of the center electrode into a ceramic body, an elastic tubular press mold is located in a press body, the press mold being closed off by a movable plug having a needle-like extension with a gripping en... | 07/04/1978 |
| 4089919 | Method of reshaping resiliently deformable sheet material for integration with a flexible plastic foam as a cover therefor A method is disclosed of reshaping a sheet of resiliently deformable material impervious to fluid by conforming it to the cavity of a female mold and casting a flexible plastic foam into contact with said sheet material, whereby said material is integrate... | 05/16/1978 |
| 4082590 | Process for manufacturing a flexible cylindrical body A process for manufacturing a flexible cylindrical body includes the steps of providing a flexible preform of non-resilient synthetic material which is inflatable to cylindrical form, inserting the preform into an elongated coil of an electrically conduct... | 04/04/1978 |
| 4078293 | Method of making rigid swimming pool cover A plastic foam rigid swimming pool cover is fabricated by forming an amorphous plastic foam material into a shape conforming generally to the periphery of the pool and into a shape for covering the swimming pool. The cover is also shaped for lifting as an... | 03/14/1978 |
| 4078031 | Method of making a magnetic flexible printing plate A flexible resilient printing plate adapted for use on a magnetic printing cylinder is formed by mixing a ferrous metal powder within a volume of liquid vinyl plastisol, casting the mixture onto a face layer of at least partially cured vinyl plastisol to ... | 03/07/1978 |
| 4053275 | Apparatus for making flexible corrugated rubber tubing A method and apparatus for making flexible rubber tubing with axially spaced annular or helical corrugations. A sleeve of uncured vulcanizable rubber is slipped over a forming mandrel and an external form comprising a length of flexible, corrugated, axial... | 10/11/1977 |
| 4044088 | Stressed hollow concrete cylinders The production of a moulded stressed concrete pipe in which stressed coated tendons are completely embedded in the finished article. The pipe is moulded in at least one longitudinal segment joined only by helically concentrically positioned tendons. The c... | 08/23/1977 |
| 4032610 | Manufacture of contoured records A method of making disc records, particularly video discs from thermoplastic sheet material. In a press a thin flexible matrix is disposed between the sheet, which is backed by a resilient cushion, and a flexible diaphragm which constitutes a wall of a hy... | 06/28/1977 |
| 4027543 | Method for curing elastomeric articles A method for curing vulcanizable elastomeric articles positioned between a mold surface and a pressure chamber including the steps of introducing into the chamber a hot fluid of relatively high heat capacity, e.g., steam, under pressure for a sufficient p... | 06/07/1977 |
| 4024007 | Lining cavities with heat insulating material A method of lining a cavity, such as, for example, the head box for an ingot mold, comprising applying to the surface to be lined a lining of a self-supporting deformable fibre mat refractory composition and then exerting pressure on that lining so as to ... | 05/17/1977 |
| 4017572 | Method of molding articles of polymeric foam substantially free from flashing An improved molding apparatus is described for use with relatively light weight molds, particularly molds for articles having a plurality of voids therein. A light weight two-piece mold, one-half being substantially rigid and the other relatively flexible... | 04/12/1977 |
| 4009063 | Method of lining a pipe A method of lining a passageway with a hard, rigid pipe of thermosetting resin, wherein a tubular fibrous felt is immersed in the resin to form a carrier for the resin. The immersed felt and resin have an inflatable tube therein and this tube is inflated ... | 02/22/1977 |
| 4002707 | Method and apparatus for the construction of concrete shells A method of constructing concrete shells of various design employing a plurality of inflatable water filled bladders which are aggregated to produce a mold having the configuration of the final structure. After a conventional concrete shell, which is form... | 01/11/1977 |
| 3998918 | Method of making a portion of an hollow, annular, sand-core Method of making an annular sand core portion by shaping sand and binder in an annular mold with an inflatable bladder. The bladder is inflatable and expandable to form and press sand core material between itself and the mold body while exerting uniform c... | 12/21/1976 |
| 3998923 | Method for making objects from plastics by means of compression moulding A method and a device for making objects from plastics, wherein a plastic present in the moulding cavity is made to set while pressure is maintained, said moulding pressure being made to act on the plastic being moulded by means of the inflation of one or... | 12/21/1976 |
| 3996320 | Method for making domed skeletal structures of concrete A method of and apparatus for making a self-supporting dome-like skeletal structure including the steps of preparing a substantially flat surface, assembling an array of multi-sided first members which is criss-crossed by paths comprising adjacent flanges... | 12/07/1976 |
| 3985330 | Disposable inner mould for boats A disposable inner mould or form for the construction of a boat hull, such mould comprising a hollow hull-shaped form made of flexible non-stretch plastic sheet material tailored in the shape of the inner surface of the boat hull. There may also be provid... | 10/12/1976 |
| 3975493 | Method for forming hollow articles from thermoplastic sheeting or film using an expandable plug A method for using an expandable forming plug in forming apparatus such as plug assisted vacuum or pressure differential forming machines and the like wherein the plug cooperates with a mold to form hollow articles such as containers, closures, trays, and... | 08/17/1976 |
