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 |
| 4158338 | Wall panel and assembly A wall panel consisting of two laminar units each including a core layer of particulate, sintered, aluminum oxide, a perforated metal shell enveloping the layer, and a continuous mass consisting essentially of elastomeric material enveloping the shell and... | 06/19/1979 |
| 4155412 | Top-loading balance The pan assembly of a top-loading balance consists of a base attached to a pan carrier for joint movement in a vertically extending direction relative to a support on which the carrier is mounted. A sensible signal is generated in response to the presence... | 05/22/1979 |
| 4152009 | Ski and safety binding for the same A ski is equipped with a binding alternatively suitable for cross country skiing and downhill skiing. A base plate is normally secured to the top face of the ski runner and a detent projects rearward from the plate. The front end of a boot carrier is pivo... | 05/01/1979 |
| 4150597 | Circular saw for cutting panels A saw arrangement in which a panel to be cut is backed in an upright position by a frame and is supported by a lower edge rest includes a vertically extending carrier bar horizontally sweeping the working area defined by the backing frame and the edge res... | 04/24/1979 |
| 4148294 | Solar collector panel and method of making A solar collector panel absorbing incident solar energy at a high rate while radiating only a small portion of the absorbed energy comprises aluminum or an aluminum alloy as a continuous metallic substrate carrying an anodized oxide layer not substantiall... | 04/10/1979 |
| 4145061 | Clamping device for a dental tool A clamping device for a dental tool consists of a tubular body whose bore has two coaxially cylindrical, terminal portions and a reduced, slightly eccentric, cylindrical, central portion. A clamping sleeve is conformingly rotatable in one of the terminal ... | 03/20/1979 |
| 4145566 | Housing for electrical devices A housing for an electric plug or the like is formed with an axial bore which tapers toward an inlet opening. A pressure member received in the bore for movement toward and away from the inlet opening in conforming engagement with the housing has a face w... | 03/20/1979 |
| 4144182 | Salts of alkylenediamine carboxylic acids and aqueous solutions thereof Aqueous solutions of salts of alkylenediaminecarboxylic acids of the formula ##STR1## such as N-isononanoyl-ethylenediamine-N, N'-diacetic acid are effective coolants and lubricants for the machining and other working of metals and inhibit the c... | 03/13/1979 |
| 4143302 | Energizing circuit for a fluorescent lamp A fluorescent lamp fires more quickly at low temperature and its service life is lengthened if the input terminals of a full-wave rectifier are connected to the lamp electrodes and a resistor and capacitor are connected in parallel circuit between the out... | 03/06/1979 |
| 4142873 | Method and apparatus for cleaning a filter bed The invention concerns the cleaning of the granulate filter bed material of a gas filter. The granulate material is contained in the spaces between two or more gas-permeable walls. The walls are designed as vertical tubes which may be cylindrical or consi... | 03/06/1979 |
| 4140106 | Drunkometer A drunkometer in which the rate of airflow toward an alcohol vapor sensing device in an input channel is sensed mechanically or electrically, and a resulting flow signal is integrated. The direction of airflow in the input channel is also sensed either by... | 02/20/1979 |
| 4139605 | Water-soluble, non-ionizing, radiopaque compounds and contrast compositions containing the same , ω-BIS-[5-(DIHYDROXYALKYL) AMINOCARBONYL-3-HYDROXYACYL-AMINO-2,4,6-TRIIODO-BENZOYL-AMINO]-OXAALKANE COMPOUNDS OF THE FORMULA ##STR1## wherein R1 is ##STR2## R and R' are hydrogen or methyl, R2 is dihydroxyalky... | 02/13/1979 |
| 4137688 | Method of vacuum packing objects in plastic foil Objects are packed in respective receptacles in a unitary body of sheet material having orifices open in a common direction. An annular edge portion of the body envelops the orifices and one or more rib portions of the body separate each orifice from each... | 02/06/1979 |
| 4136750 | Top-loading balance A single weighing pan of a top-loading balance is mounted on a vertically movable carrier spindle which transmits the weight of the pan and of a load thereon to an electromechanical transducer. Shock damage to the transducer is prevented by two superposed... | 01/30/1979 |
| 4136604 | Method and apparatus for separating individual blanks of a multiple cardboard blank The individual cardboard box blanks of strings of blanks connected by scored, frangible bridge portions are separated by stacking the multiple blanks, clamping the stack of leading individual blanks to a vibratory support and the stack of the remainder of... | 01/30/1979 |
| 4136854 | All-metal lift valve for high-vacuum applications A metallic valve member having an annular, tapering sealing face makes practically line contact along a circle with a valve seat whose frustoconical inner portion is a sheet metal element having a rounded edge directed substantially at right angles toward... | 01/30/1979 |
| 4133873 | Method of determining extracellular antigens and antibodies Hepatitis associated antigen (HAA) in human blood serum is precipitated on HAA-specific antibodies immobilized on the inner wall of a plastic tube. A solution of HAA-specific antibodies tagged with fluorescein is held in contact with the deposited antigen... | 01/09/1979 |
| 4132106 | Method for bending wire or strip material into round parts In each cycle of a sequence of repetitive cycles a longitudinal section of an elongated, continuous piece of material spaced from the free end of the piece is draped about an arcuate face of a mandrel by a bending tool moving about the axis of curvature o... | 01/02/1979 |
| 4131953 | Ventilated head gear A ventilating cap essentially consisting of an inner frame and a shell having the shape of an inverted cup and dimensioned to envelop the frame. The frame includes a hat band extending in a closed loop about an axis and ribs attached to the band in circum... | 01/02/1979 |
| 4132826 | Disposable blanket for an offset printing machine A disposable sheet to replace the rubber blanket of an offset printing machine basically consists of a flexible carrier sheet and a coating on one face of the sheet consisting essentially of a cellular latex of a synthetic elastomer free from inorganic fi... | 01/02/1979 |
| 4131255 | Rail switch arrangement In a rail switch arrangement in which an elongated rail is fixedly mounted on supporting structure and an elongated rail blade is moved on the supporting structure toward and away from a position contiguously adjacent the fixedly mounted rail, a sheet mem... | 12/26/1978 |
| 4131158 | Storage arrangement for thermal energy Heat of liquefaction and solidification is transmitted between a heat storing material undergoing the phase transition and a heating medium in a heat exchanger by means of a partly gaseous, partly liquid fluid sealed in a heat pipe a portion of which is r... | 12/26/1978 |
| 4131128 | Control valve A control valve particularly suitable for service in mechanical refrigeration systems has a spherical valve body permanently engaging an annular seal and is operated by turning the valve body about an axis perpendicular to the direction of fluid flow thro... | 12/26/1978 |
| 4131710 | Recording material containing asbestos A recording sheet consisting mainly of fibrous material is capable of displaying a colored image when contacted under pressure with substantially colorless crystal violet lactone and similar dye precursors if at least 3% of the fibrous material is constit... | 12/26/1978 |
| 4130555 | Peptide mixtures derived from collagenous material or gelatin Peptide mixtures having relatively narrow average molecular weights and characteristic amino acid compositions and a process for preparing the same from a collagenous material or gelatin are disclosed. The peptide mixtures have unique properties and are u... | 12/19/1978 |
| 4127399 | Method of making granulated slag The hot mixture of solid slag particles and water produced by contacting water with the molten slag released from a blast furnace is introduced into a tank equipped with an overflow and a filter at the overflow which permits a portion of the water and a m... | 11/28/1978 |
| 4126014 | Solar collector panel and refrigeration system operated thereby Solar energy is collected by a plate-shaped panel of pliable plastic construction. The two major walls of the panel whose edges are sealed to each other consist of transparent and black plastic respectively and bound a cavity. The panel is expanded by air... | 11/21/1978 |
| 4126470 | Light concrete and method of preparing the same A light concrete prepared from a mixture of Portland cement, cellular aggregate, and an admixture including a melamine-formaldehyde condensate carrying sulfo groups for reducing the need for mixing water, an alkaline earth metal stearate as a water repell... | 11/21/1978 |
| 4126594 | Method of protecting plastic films against abrasion and lacquer for performing the method A lacquer consisting essentially of a uniform dispersion or solution of 8% to 16% polymerized lower alkyl acrylate and/or methacrylate having 1% to 20% free carboxyl groups, 2.5% to 10% polymethyl or polyethylmethacrylate, 5% to 10% water-soluable, thermo... | 11/21/1978 |
| 4126664 | Stabilized cyanamide solutions The storage stability of strong or concentrated, aqueous solutions of cyanamide, even those conventionally stabilized with acid, is enhanced by small amounts of lower alkyl esters of carboxylic acids having preferably a pKa25° value... | 11/21/1978 |
| 4125342 | Clamping arrangement for the replaceable blade of a rotary cutting tool The rotating cutter head of a reamer is formed with a recess, open in a radially outward direction and one circumferential direction relative to the axis of rotation, and a blade is retained in the recess between opposite, radially extending faces of the ... | 11/14/1978 |
| 4124266 | Electrical connecting means An electrical contact to be made between an electrically insulated first conductive strip and a socket member having an electrical contact element therein in which a crimpable, electrically conducting, second strip is caused to pierce the first strip at t... | 11/07/1978 |
| 4124439 | High bulk paper of great stiffness Paper having adequate mechanical strength and stiffness for use in xerographic equipment at a very low weight is prepared from a stock containing untreated cellulose fibers as well as cellulose fibers stiffened by impregnation with melamine-formaldehyde p... | 11/07/1978 |
| 4120120 | Lifting arrangement for a window of a vehicle and the like A window is mounted on supporting structure of a motorcar body on a carrier for limited vertical movement. A motion-transmitting linkage connecting the carrier to a lifting drive includes a link which is movably secured to the carrier and the supporting s... | 10/17/1978 |
| 4119517 | Apparatus for purifying water The casing of apparatus for purifying water encloses a chamber and is formed with two orifices spaced from the chamber in opposite directions and communicating with the same for gravity flow of the water to be purified from one of the orifices through the... | 10/10/1978 |
| 4119299 | Cable drum arrangement with brake A cable drum arrangement including a brake drum on a stationary support and a brake shoe on a carrier for the cable drum includes a flyweight and a compression spring radially interposed between flyweight and brake shoe which biases the brake shoe toward ... | 10/10/1978 |
| 4119182 | Two-speed bicycle hub with coaster brake and pedal actuated speed shift In a hub for the rear wheel of a bicycle, pawl-and-ratchet clutches connect the planet carrier and the ring gear of a planetary gear transmission with ratchet teeth on the hub shell. The pawls on the faster turning ring gear may be retracted by an annular... | 10/10/1978 |
| 4119127 | Shoulder bag A shoulder bag has a tubular carrying strap whose hollow end portions are in communication with the hollow receptacle of the bag.... | 10/10/1978 |
| 4118978 | Thread tension gage A sensing rod and two parallel guide rods project from the housing of a thread tension gage dimensioned to be carried in one hand and operated by pressure of one finger on a push-button which causes the threat-engaging end portions of the guide rods to ad... | 10/10/1978 |
| 4118906 | Concrete vessel having wall apertures lined with tubular inserts Apertures in the cast concrete walls of a swimming pool are lined with tubular inserts entirely received in the apertures in sealing, conforming engagement with the concrete. The length of each insert in the direction of wall thickness is equal to or shor... | 10/10/1978 |
