Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 4216821 | Pump/heat exchanger A pump/heat exchanger assembly has tubes with double walls, inner and outer respectively, the outer wall being provided with inner longitudinal grooves. The exchange occurs between a primary fluid circulating outside the said tubes and a secondary fluid c... | 08/12/1980 |
| 4198667 | Magnetic head platform incorporating at least one integrated transducer A method of producng magnetic head-carrying platforms for supporting one or more integrated transducers arranged on an insulative base and having electrical output strips and an insulating protective member covering the transducer and the output strips pr... | 04/15/1980 |
| 4196419 | Analog to digital converter A circuit for digitizing data represented by a variable electric current includes a capacitor to which a variable direct current is applied, and a reference stage defining two voltage levels and producing a control signal when the voltage across the capac... | 04/01/1980 |
| 4196079 | Pleated filter underdrain, method and apparatus A method and apparatus for air scouring a layered filter bed wherein the air is dispersed into the finer particles of the bed without disturbing the coarse large aggregate in the lower portion of the bed to prevent inter-mixing of the fine aggregate with ... | 04/01/1980 |
| 4194190 | Arrangement for converting digital signals representing characters into a self-locking dot representation The present invention provides apparatus for converting digital electrical signals representative of alpha-numeric characters and other symbols into a particular pattern of dots symbolic of the character or symbol as used, for example, in the Braille alph... | 03/18/1980 |
| 4194110 | Localized-field static magnetizing device A localized-field static magnetizing device consists of a non-magnetic substrate having a magnetic layer thereon that contains a succession of adjoining zones of alternately differing lengths and having magnetic inductions of alternately opposing directio... | 03/18/1980 |
| 4193017 | Gas discharge display panel A d.c. gas discharge display panel consists of a rectangular array of discharge cells suitable for displaying alphanumeric characters surrounded by a circular array. The two arrays share one common set of conductors and are addressed sequentially by reduc... | 03/11/1980 |
| 4192638 | Molding device having heat transfer chambers insulated from each other for molding expandable thermoplastic resin particles A mold for polystyrene has two spaced dies receiving the polystyrene therebetween. The wall of each die has two superposed independent chambers, one a heating chamber and the other a cooling chamber adjacent the die surface. Passages from the heating cham... | 03/11/1980 |
| 4191955 | Method of control for an analog display device of the non-continuous liquid crystal strip type A liquid crystal film placed between plate electrodes and point electrodes can have a first optical state 1 if the electrical excitation applied between the plate and point electrodes is higher than a threshold value Vs and a second optical sta... | 03/04/1980 |
| 4189302 | Continuous process and apparatus for randomly coloring pile fabric A continuous process and apparatus for randomly coloring a pile fabric material includes pretreating the fabric to be dyed with a wetting agent, conveying the pretreated fabric continuously through a series of operating stations including a gum applicator... | 02/19/1980 |
| 4189524 | Structure for multilayer circuits To reduce the proportion of rejects resulting by reasons of short circuits in the manufacture and use of miniaturized multilayer circuits and to improve the electric efficiency, there is inserted between each conductive layer of low resistance and each in... | 02/19/1980 |
| 4188216 | Method of print dyeing textile materials A method for preparation of the final film used for engraving a flat screen, belt screen or rotary screen for a printing machine. The final film is prepared from a photograph of the image to be reproduced and engraved by known techniques on a screen so as... | 02/12/1980 |
| 4188037 | Composite flexible joint Metalloplastic flexible annular joint, wherein it comprises a first metal ring constituted by an inner metal spring with contiguous turns closed on itself and surrounding said spring, at least one metal envelope in which is embedded the spring, said envel... | 02/12/1980 |
| 4187551 | Apparatus for writing data in unique order into and retrieving same from memory Data processing apparatus includes a storage circuit or memory, and an addressing circuit for identifying word locations within the storage circuit or memory into and from which a plurality of information items are to be written and read, respectively. A ... | 02/05/1980 |
| 4186049 | Heat exchanger integrated into the main vessel of a molten combustible salt reactor Heat exchanger integrated into the main vessel of a molten combustible salt reactor comprising a reactor skirt containing the active core, a main vessel surrounding the reactor skirt, pumps and primary exchangers, an outer vessel which doubles the main ve... | 01/29/1980 |
| 4186301 | Automatic focus control for a microscope A process and apparatus for the automatic correction of the focusing of a microscope in an image plane utilizes two microscope outputs forming two images of the same object in two different planes surrounding the image plane and two matrices with at least... | 01/29/1980 |
| 4185230 | Gas discharge display panel having an array of discharge cavities and a self scan glow transfer device formed by cavities in the array A gas discharge display panel has a glow transfer device extending along one or both edges of the panel and consisting of a row, or rows, of cavities extra to the display. One electrode of the, or each, transfer device is common to the conductor associate... | 01/22/1980 |
| 4184631 | Device for reading information magnetically coded on a carrier There is provided a reader for reading information magnetically coded on a carrier. The reader includes a magnetizing device for magnetizing the information precoded on the carrier and a transducer for detecting the magnetized information as the carrier i... | 01/22/1980 |
| 4184348 | Apparatus for randomly coloring textile yarns in a batch system Randomly dyed skeins of yarn are produced in an apparatus which comprises an open vat adapted to be filled with a liquid dye bath and having rack means for supporting a plurality of skeins of yarn which are to be randomly dyed. The rack means includes val... | 01/22/1980 |
| 4184806 | Pumping ejector Pumping ejector having a fixed tubular ejector body passing through the wall of a protective cell. In its part which projects into the cell this body has an extension provided with a first lateral connection for the admission of a pumping steam flow, a se... | 01/22/1980 |
| 4183785 | Method for positioning moderator structure for the core of a molten-salt reactor The moderator structure is placed within a core space limited by a bottom wall, a top wall and a lateral reflector and is constituted by a stack of prismatic or spherical nodules applied in mutual contact in the three dimensions which prevent relative dis... | 01/15/1980 |
| 4182481 | Bar code reading device A device for reading printed characters formed of elements separated by spaces of first and second kinds in accordance with a character code. The device includes a read head arranged for relative motion with respect to the elements of a character, and is ... | 01/08/1980 |
| 4181863 | Photodiode circuit arrangements Temperature regulation of an avalanche photodiode is obtained by internal heating, by passing a reverse current through the breakdown region of the photodiode. In operation, an empirically-derived, reverse bias potential, equal to the breakdown potential ... | 01/01/1980 |
| 4181327 | Assembling method A process for attaching one or more layers of materials to a base or backing having an anvil in its composition. A backing has incorporated therein an anvil strip of high impact material with formed depressions for clenching staples driven through the lay... | 01/01/1980 |
| 4178978 | Manual operator for coiling door A manual operator for a coiling door has a reel mounted for free rotation on a shaft supporting drums to which the coiling door is secured. An endless flexible non-extensible element is mounted on the reel with a sufficient number of turns thereon for com... | 12/18/1979 |
| 4179606 | Flame sensor A flame sensor according to the invention enables automatic monitoring and/or control of the condition of combustion of a flame such as perfect combustion or imperfect combustion by detection of particular infra-red radiations emitted by the flame. The fl... | 12/18/1979 |
| 4178560 | Phase comparator arrangement for controlling an electrical member A phase comparator circuit arrangement is provided for controlling an electrical member on the basis of a control signal formed in accordance with the difference detected between a first waveform which is periodic and has a constant cyclic ratio, after it... | 12/11/1979 |
| 4177450 | Process and method to initiate a receiving and transmitting station linked by a connecting channel of an information exchange system consisting of several transmitting and receiving stations A communications system in which control or access to a channel is distributed among the several transmitting-receiving station linked by the channel rather than being centralized or under a master station control.... | 12/04/1979 |
| 4175694 | Method and apparatus for processing documents A method and apparatus for processing documents having both pre-printed information adapted to be identified by an automatic recognition device and handwritten information adapted to be identified by the human eye. Each document is subjected to an operati... | 11/27/1979 |
| 4173781 | System of coherent management of exchanges between two contiguous levels of a hierarchy of memories In order to provide for coherence of exchanges between a block of data of a ower speed level and several blocks of data of a contiguous level of higher speed, a control table of the block of the lower speed level registers page by page at least those block... | 11/06/1979 |
| 4172666 | Inspection apparatus To distinguish between different types of fault detected by laser scanning of a moving web two or more detectors are arranged to collect light reflected in different ranges of angles in direction of web motion. By combining outputs of these in a logical w... | 10/30/1979 |
| 4171953 | Method for randomly coloring textile yarns in a batch system A method for producing randomly dyed skeins of yarn in an apparatus which comprises an open vat adapted to be filled with a liquid dye bath and having rack means for supporting a plurality of skeins of yarn which are to be randomly dyed. The rack means in... | 10/23/1979 |
| 4172277 | Chopping control system for a converter in a DC electrical power supply A system for controlling chopping for a converter in a DC electrical power supply. A transistor is arranged for chopping the DC input voltage which is connected to a chopping transformer. A control transistor controls the chopping transistor by means of p... | 10/23/1979 |
| 4168882 | Optical systems An optical system for conveying an optical image having two first biconvex od lenses arranged end to end on a common optical axis in spaced relationship, and between said first rod lenses but not in contact with them a pair of second rod lenses also arrang... | 09/25/1979 |
| 4167165 | Fuel vaporizers for internal combustion engines A self-regulating, fast-response fuel vaporizer is disclosed which is cape of promoting increased efficiency of combustion of the fuel supplied to a spark ignition engine throughout the entire working range of the engine. The vaporizer comprises an inlet... | 09/11/1979 |
| 4165799 | Dismountable tower for interior maintenance of spherical tanks The present invention refers in general to dismountable structures, and more particularly involves a dismountable structure for inside maintenance in spherical tanks, providing two rotatable towers, one atop the other, with anti-friction bearings for rota... | 08/28/1979 |
| 4165540 | Method for storing a binary signal in a high speed flip flop memory having controlled minimum changeover time and apparatus therefor A method for storing a binary signal in a high speed flip-flop memory. The apparatus includes a clock signal selecting device connected to control a pair of memory elements in cascade. Data is introduced into the first memory element under the control of ... | 08/21/1979 |
| 4163288 | Associative memory A high capacity associative read/write memory is provided which includes storage means which can be read from or written into and having memory units of equal capacity each containing an equal and predetermined number of levels. Addressing means are coupl... | 07/31/1979 |
| 4163210 | Arrangement for checking a contact inserted between a transmitter circuit and a receiver circuit to allow electrical signals to be transmitted An arrangement for checking contact betweena transmitter circuit situated upstream and a receiver circuit situated downstream, the contact being made to enable electrical signals corresponding to 1 and 0 logic states produced by the transmitter circuit to... | 07/31/1979 |
| 4161742 | Semiconductor devices with matched resistor portions In an integrated circuit semiconductor device different matched resistors are provided by at least one resistor comprising at least two matched resistor parts connected together, these resistor parts also being matched to each constituent resistor part of... | 07/17/1979 |
