baber/WOPTO huggingface dataset:
Patent RU-2006044-C1 (RU)
Title: Приемник
Inventor: DIKAREV VIKTOR I
IPC: G01R23/00
Filed: 1992-06-15
Granted: 1994-01-15
Abstract: Изобретение относится к измерительной технике и может использоваться для поиска и обнаружение фазоманипулированных сигналов, а также визуальной оценки их основных параметров. Панорамный приемник содержит антенну 1, два генератора развертки 2, 22, гетеродин 3, смеситель 4, два усилителя промежуточной частоты 5, 7, обнаружитель 6, два измерителя ширины спектра 8, 9, блок сравнения 10, пороговый блок 11, ключ 12, линию задержки 13, перемножитель 14, n-каналов обработки, каждый из которых состоит из полосового фильтра 15, амплитудного детектора 16, видеоусилителя 17, вертикального электрода 18, /n + 1/ - амплитудный детектор 20, дифференцирующий блок 21, второй генератор развертки 22, /n + 1/ -ю ЭЛТ 23, /n + 2/ - полосовой фильтр 24, 26, делитель частоты 25, фазовращатель 27, /n + 2/-ю ЭЛТ 28. 3 ил.
Patent RU-2051691-C1 (RU)
Inventor: STEPANOV VLADIMIR P
IPC: A61L2/04
Filed: 1992-06-24
Granted: 1996-01-10
Abstract: FIELD: pharmaceutical industry. SUBSTANCE: unit for sterilization of glass pharmaceutical containers has tunnel-type through thermal chamber with inlet and outlet sections and detachable working section; sterilization system with upper and lower thermal sterilization members; ventilation system with means for producing air curtain installed at inlet and outlet and intercommunicated with each other by ventilation overflow; transportation system with passing load carrier with parallel guides, and loading and unloading mechanism. Passing load carrier of transportation system is made in form of upper and lower guides combined into stationary multiple-strans trough. Loading mechanism and unloading mechanism include multistrand guides and vertically closed chain conveyers with comb-like carrier pushers. Guides of unloading mechanism has sill on transfer part for reorientation of containers. Upper guides are mounted on holder and inlet and outlet sections are sluice-type. EFFECT: higher efficiency. 7 dwg
Patent RU-2013169-C1 (RU)
Title: Method of cutting metal by explosion energy
Inventor: VOLGIN LEONID A
IPC: B21D26/08
Filed: 1992-07-23
Granted: 1994-05-30
Abstract: FIELD: mechanical engineering. SUBSTANCE: method involves making preliminary continuous linear notch of variable depth on one of the surfaces of workpiece. On one end of notch its depth is bigger than depth of remaining part of notch. Then elongated explosive charge is placed on surface of workpiece which is opposite to surface with notch. Then explosive charge is initiated beginning from side of charge corresponding to notch section having biggest depth. EFFECT: enhanced operating capability. 4 dwg
Patent RU-2060349-C1 (RU)
Title: Threaded joint of pipes for production strings of up to 168 mm diameter
Inventor: KOLOTOV ANATOLIJ V
IPC: E21B17/08
Filed: 1992-07-28
Granted: 1996-05-20
Abstract: FIELD: casing string. SUBSTANCE: joint includes casing section 1 and coupling 2 joint through cone threaded section 3. Cylindrical boring 5 with length exceeding 200 mm is originated on section 4 of coupling 2. EFFECT: high efficiency. 2 dwg
Patent RU-2026141-C1 (RU)
Inventor: BEREZENKO LEONID EVGENEVICH
IPC: B22D27/04
Filed: 1992-05-06
Granted: 1995-01-09
Abstract: FIELD: foundry practice. SUBSTANCE: the mould is built-up from graphite of different grades. A novel feature of the mould is that solid cores are made from graphite with a coefficient of thermal expansion exceeding that of the silicon by a factor of 1.7 to 2.1. The cores are spaced apart by a distance which is between 0.07 and 0.2 times their height. The mould temperature before pouring is maintained at 1400 - 0.1 1400 - 0,1/αd where α is the coefficient of thermal expansion of the core material and d is the cross sectional area of the core in square mm. EFFECT: improved quality of castings. 4 cl, 2 dwg
Patent RU-2037249-C1 (RU)
Title: System of uninterrupted power supply
Inventor: MIKHALCHENKO GENNADIJ YA
IPC: H02J9/06
Filed: 1992-08-06
Granted: 1995-06-09
Abstract: FIELD: electrical engineering. SUBSTANCE: system is designed for industrial computers. It has three-pole automatic switch, input radio interference filter, inverter, high-frequency filter with information input, capabilities storage circuit, instrumentation converter, unit of storage batteries, source of auxiliary power, discharger, low-frequency filter, two-input electronic shunting device, microprocessor with information display and two-winding chokes. EFFECT: avoidance of use of high-frequency self-oscillating modes of voltage values close to boundary, provision for emergency-free operation of storage batteries, realization of information exchange with fed computers in case of necessity. 3 cl, 10 dwg
Patent RU-2053398-C1 (RU)
Inventor: ZHARKOV SERGEJ V
IPC: F02C6/14
Filed: 1992-06-16
Granted: 1996-01-27
Abstract: FIELD: power engineering. SUBSTANCE: air accumulating plant has air compressor, gas pipe connected to compressed air accumulator, heat accumulator provided with built-in wind generator; al members are mounted for connection with wind generator. EFFECT: enhanced reliability. 2 cl, 1 dwg
Patent RU-2069550-C1 (RU)
Title: Device for light exposure onto visual analyzer
Inventor: BAKUSOV LEONID M
IPC: A61F9/00
Filed: 1992-10-08
Granted: 1996-11-27
Abstract: FIELD: medical equipment. SUBSTANCE: device is used as for exposure series, and for permanent carrying. For the purpose holder 1 is used with common or simple optical glasses. Passage of sun light through corresponding color areas 4 of light filters 2 permits to carry out contrast exposure onto different segments of eye retina. Fine selection of optimal location of color areas 4 relatively retina is performed by rotation of light filters 2 in its own annular element for any light filter. Rotation is registered by angular scale 7 drawn onto annular element 6 or holder 1. Device conducts radial movement of areas 4 along light filter 2 due to rotation of transparent rings 8 of light filters 2 and fixation of the rings relatively each other. Device demonstrates high aesthetics. It can be used for stimulation of protection forces of organism, for removal of fatigue of visual analyzer, for improvement of tone. EFFECT: reduced time for cure; improved therapeutical effect. 7 cl, 8 dwg
Patent DE-10000837-C1 (DE)
Title: Alkali-free alumino-borosilicate glass used as substrate glass in thin film transistor displays and thin layer solar cells contains oxides of silicon, boron, aluminum, magnesium, strontium, and barium
Inventor: PEUCHERT ULRICH
IPC: C03C3/091
Filed: 2000-01-12
Granted: 2001-05-31
Abstract: Alkali-free alumino-borosilicate glass contains (in wt.%) 58-65 SiO2, 6-11.5 B2O3, 14-25 Al2O3, 4-8 MgO, 0-8 CaO, 2.6-4 SrO, 0-0.5 BaO, 3 SrO + BaO and 0-2 ZnO. The glass has a thermal expansion coefficient alpha 20/300 of 2.8-3.8 \* 10<-6>/K.
Patent DE-10048489-C1 (DE)
Title: Polymer Stud Grid Array und Verfahren zur Herstellung eines derartigen Polymer Stud Grid Arrays
Inventor: PUYMBROECK JOZEF
IPC: H05K3/40
Filed: 2000-09-29
Granted: 2002-08-08
Abstract: Auf einem Substrat (S) werden eine erste Verdrahtungslage (V1) und metallisierte Durchkontaktierungslöcher (D) gebildet. Auf die Oberseite (O1) des Substrats (S) wird dann durch Spritzgießen eine Substratlage (SL) aufgebracht, wobei das Material durch die Durchkontaktierungslöcher (D) hindurchtritt und auf der Unterseite (U) des Substrats (S) Polymerhöcker (PS) entstehen. Eine auf der Substratlage (SL) gebildete zweite Verdrahtungslage (V2) ist über Sackloch-Durchkontaktierungen (SD) mit der ersten Verdrahtungslage (V1) und damit über die Durchkontaktierungslöcher (D) mit Außenanschlüssen (AA) auf den Polymerhöckern (PS) elektrisch leitend verbunden.
Patent DE-10115283-C1 (DE)
Title: Flex-Verbindungsanordnung mit Federgehäuse
Inventor: BACH FRIEDRICH
IPC: H01R12/61
Filed: 2001-03-28
Granted: 2002-10-02
Abstract: Verbindungsanordnung für Flex-Flachbandkabel (1a, 1b) mit parallelen, voneinander beabstandeten Leiterbahnen, die im Kontaktbereich (4) abisoliert sind, DOLLAR A mit einem ersten Gehäuseteil (2a), an dessen Boden (3) ein Haupt-Flex-Flachbandkabel (1a) befestigt ist und DOLLAR A einem zweiten Gehäuseteil (2b), in dem ein Abzweig-Flex-Flachbandkabel arretiert ist, mit Federzungen (5), die den abisolierten Bereich des Abzweig-Flex-Flachbandkabels (1b) im zusammengefügten Zustand der Gehäuseteile (2a, 2b) gegen den abisolierten Bereich des Haupt-Flex-Flachbandkabels (1a) pressen, DOLLAR A dadurch gekennzeichnet, daß DOLLAR A das zweite Gehäuseteil (2b) ein Unterteil (8a) und ein damit über verbiegbare Stege (9a, 9b) verbundenes Oberteil (8b) aufweist, wobei das Unterteil (8a) Arretiermittel zur Befestigung eines Endes eines Abzweig-Flex-Flachbandkabels (1b) und einen Durchbruch (10) im Bereich der Kontaktbereiche (4) auf dem Flachbandkabel (1a) aufweist und DOLLAR A das Oberteil (8b) über die Stege (9a, 9b) verschwenkbar auf das Unterteil (8a) absenkbar und dort verrastbar ausgebildet ist und über dem Durchbruch (10) im Unterteil (8a) ausbauchende Federzungen (5) über jeder Leiterbahn aufweist, die das Abzweig-Flachbandkabel (1b) durch den Durchbruch (10) hindurch auf das Hauptflachbandkabel (1a) pressen.
Patent DE-10118601-C1 (DE)
Title: Verfahren zum Betrieb einer Reinigungsanlage
Inventor: ERBEL HORST
IPC: B08B3/04
Filed: 2001-04-12
Granted: 2002-08-14
Abstract: Die Erfindung betrifft ein Verfahren zum Betrieb einer Reinigungsanlage mit folgenden Verfahrenschritten: DOLLAR A a) Entfernen der Luft aus einer Arbeitskammer (4), einem Kondensator (8) und einem Leitungssystem (9, 12) durch Anlegen eines hohen Unterdrucks nach dem Verschließen der Arbeitskammer (4), DOLLAR A b) Reinigen des Reinigungsguts durch das Lösemittel, wobei zuletzt Lösemittel-Sattdampf der Arbeitskammer (4) zugeführt wird, DOLLAR A c) Herstellen einer ersten Verbindung (14) zwischen der Arbeitskammer (4) und dem luftgekühlten Kondensator (8) bis ein Druckausgleich zwischen der Arbeitskammer (4) und dem Kondensator (8) vorhanden ist, DOLLAR A d) Unterbrechen der ersten Verbindung (14) und Herstellen einer zweiten Verbindung (16) zwischen der Arbeitskammer (4) und dem Kondensator (8), wonach Dampf von der Arbeitskammer (4) abgesaugt und auf einen Druck verdichtet wird, bei welchem seine Temperatur über der Kühltemperatur des Kondensators (8) liegt, DOLLAR A e) Zuführen des im Kondensator (8) erzeugten Lösemittelkondensats zum Vorratsbehälter (28) während der Schritte c) und d) und DOLLAR A f) Belüften der Arbeitskammer (4).
Patent DE-10127981-C1 (DE)
Inventor: SCHILLING ANDREAS
IPC: B42D25/29
Filed: 2001-06-08
Granted: 2003-01-16
Abstract: A security element ( 2 ) comprising a reflective, optically variable surface pattern ( 3 ) which is embedded in a layer composite of plastic material and which can be visually recognized from predetermined observation directions is formed from a mosaic of optically active surface elements ( 13 ). In the mosaic of the surface pattern ( 3 ) at least two of the mosaic surfaces ( 11; 12 ) of the surface pattern ( 3 ) are arranged substantially adjacent and have microscopically fine light-diffractive relief structures ( 4 ). The spatial frequencies of the relief structures in the mosaic surfaces ( 11; 12 ) are of values from predetermined spatial frequency ranges in such a way that, in the case of illumination beams which are incident obliquely relative to a normal onto the plane of the layer composite, the relief structures of the mosaic surfaces ( 11; 12 ) deflect visible monochromatic light parallel to the normal ( 32 ). The relief structures of the mosaic surfaces ( 11; 12 ) differ only in respect of spatial frequency, the difference in the spatial frequencies in the adjacent mosaic surfaces ( 11; 12 ) being at most 40 lines/mm.
Patent DE-10158425-C1 (DE)
Title: Gargerät mit Gebläse und Wasserzufuhr
Inventor: HELM PETER
IPC: F24C15/32
Filed: 2001-11-29
Granted: 2003-09-11
Abstract: Ein Gargerät besitzt einen Garraum (11) und ein oder mehrere Heizelemente (12). Ferner ist ein Gebläse (20) vorgesehen, das ein Radialgebläserad (22) und ein mit dem Radialgebläserad (22) rotierendes Zerstäubungselement aufweist. Eine Wasserzufuhr (30) weist mindestens einen Wasseraustritt (33) auf, der Wasser auf das Zerstäubungselement (25) gibt. Dadurch soll eine Verdampfung des Wassers und damit eine feuchte Garraumluft geschaffen werden. DOLLAR A Das Zerstäubungselement ist ein scheibenförmiges, achssymmetrisches Element, dessen Außenradius gleich oder größer dem des Innenradius des Schaufelbereiches des Radialgebläserades (22) ist. Das Zerstäubungselement ist in axialer Richtung neben dem Radialgebläserad angeordnet, und der Wasseraustritt (33) ist benachbart zum Zerstäubungselement (25) außerhalb des Radialgebläserades (22) angeordnet.
Patent DE-10218632-C1 (DE)
Title: Motor vehicle safety device, used as a luggage space cover or separating net, has tension device assigned to a fixing element and moved from a relaxed state into a tensioned state by an operating element producing a pre-tension
Inventor: GOEBBELS ANDREAS
IPC: B60R5/04
Filed: 2002-04-25
Granted: 2003-05-08
Abstract: Motor vehicle safety device (10) such as a luggage space cover or separating net comprises a flexible material wound around a winding shaft and positioned in a housing which is removably fixed on at least one fixing point (12), e.g. on the side of the vehicle or on a vehicle component, by at least one fixing element (25a, 25b, 26a, 26b) in a mounting position.  A tension device (29a) assigned to the fixing element is moved from an at least partly relaxed state into a tensioned state by an operating element (16) producing a pre-tension between the housing and the fixing point. The tension device permanently remains in the tensioned state in the housing in the mounting position.  The tension device has a locking device securing the tension device in the tensioned state.
Patent DE-10222010-C1 (DE)
Title: Leistungsschalter für hohe Ströme und Niederspannung
Inventor: KRIECHEL RALPH
IPC: H01H1/22
Filed: 2002-05-17
Granted: 2003-11-20
Abstract: Die Erfindung betrifft ein Leistungsschalter für hohe Ströme und Niederspannung, der ein Unterteil (2) mit Zwischenwänden (5), einen in Seitenblenden (28) gelagerten Betätigungsmechanismus (30) mit einem Kniehebelsystem (34) aufweist und mehrere Kontakteinheiten (9...11) aufweist. Die Kontakteinheiten (9...11) enthalten mehrere bewegliche Kontaktfinger (18), die in einem U-förmigen Kontakthalter (24) gegen die Wirkung von Kontaktdruckfedern (26) schwenkbar gelagert sind. Ein Verbindungssteg (38) aus isolierendem Formstoff ist einstückig mit den Kontakthaltern (24) verbunden und verläuft oberhalb der Kontaktdruckfedern (26). Die mittlere Kontakteinheit (10) ist über ein in den Seitenblenden (28) schwenkbar gelagertes Halteblech (42) gelenkig mit dem Kniehebelsystem (34) gekoppelt. An dem Verbindungssteg (38) sind Abschirmsegmente (56, 57) angeformt, die an den Zwischenwänden (5) im Bereich von Aussparungen (54) verlaufen, die für die Schaltbewegung des Verbindungssteges (38) vorgesehen sind.
Patent DE-10224075-C1 (DE)
Title: Folding device for securing reinforcing frame on inside of automobile sliding roof opening by provision of folded connection flange
Inventor: SCHWEIGER STEPHAN
IPC: B21D39/02
Filed: 2002-05-31
Granted: 2003-11-27
Abstract: The folding device (1) has a folding bed (4) provided with a peripheral counter-bearing edge (10) of similar contour to the sliding roof opening (7) and with a height corresponding to the flange width of the reinforcing frame (6). The roof panel (5) is rotated relative to the folding bed with its inside surface facing upwards, the reinforcing frame fitted over the roof opening with its flange abutting an inwards projecting flange (8) of the roof opening and the folded connection provided by a folding unit (15) with at least 4 folding plates (17), a packing slider unit (16) having at least 4 packing slider segments (23) supporting the flanges during the folding operation. The folding unit and the packing slider unit are combined in a vertically adjustable work unit (13), with outwards movement of the packing slider segments after vertical movement into the working position.
Patent DE-19534937-C1 (DE)
Title: Variable wavelength laser for optical transmission system
Inventor: STEIN KARL-ULRICH DR
IPC: H01S5/042
Filed: 1995-09-20
Granted: 1996-12-05
Abstract: The laser (1) has an active laser zone (3) for providing laser light of a given wavelength and a tuning zone (5) for continuous tuning of the laser emission wavelength. The active section (2) is supplied with a variable modulation current (I1) determining the intensity of the emitted laser radiation, the tuning section (4) receiving a tuning current (I2)determining the laser wavelength.  The tuning current is obtained directly from the modulation current , with the laser wavelength held constant independent of the intensity of the emitted laser radiation.
Patent DE-19607466-C1 (DE)
Inventor: PICKERT GERO
IPC: E06B11/08
Filed: 1996-02-28
Granted: 1997-07-17
Abstract: The rotatable cross stays of the turnstile (2) are bent outwards from the central point (1) against the rotary direction of the turnstile. The cross stays of the fixed stop, from outwards to inwards, are bent to the right with the turnstile rotating to the left, and with the turnstile rotating to the right are bent to the left towards the centre. The rotatable cross stays of the turnstile may be curved from the midpoint outwards against the rotation direction of turnstile.
Patent DE-19608523-C1 (DE)
Title: Method of fixing rail system to ground
Inventor: SUES JOACHIM DR ING
IPC: E01B3/16
Filed: 1996-03-06
Granted: 1997-05-28
Abstract: Support H-beams (2) for a rail system (3) are firmly held to the ground by anchor pins (6) located between the beams which hold down plates (13) over the feet (4) of the beams.
Patent DE-19647120-C1 (DE)
Inventor: HOEPKE GERHARD
IPC: H04N9/29
Filed: 1996-11-14
Granted: 1998-05-07
Abstract: The holder includes a flat injected part consisting of a first part (12) with a lug (14) for attachment to a picture tube. A second part (18) has an opening (20) or elongated hole through which the first part can be passed to form a loop which holds the demagnetising coil.   Lateral protrusions of the second part engage in lateral grooves in the first part. Preferably, the first part is triangular with a trapezoidal lug on its free end.
Patent DE-19650265-C1 (DE)
Title: Connection device for window-pane and window-winder of motor vehicle
Inventor: LIEB HANS-DIETER
IPC: E05F15/689
Filed: 1996-12-04
Granted: 1998-06-10
Abstract: The device has a profiled guide (1) with at least two spaced apart clamping parts (10a,b) resting on one side of the window-pane (7). The guide has also two spaced apart stops engaging with the bottom edge of the window-pane. Each clamping part has a separate clamping jaw (2) resting on the other side of the window-pane. A slide-piece (9) joined to the profiled guide, grips around part of a guide-rail (8). That part of the slide-piece gripping round the rail possesses a clearance along the vehicle's longitudinal axis so as to allow restricted swivelling between the profiled guide joined to the slide piece, and the guide rail along the vehicle's transverse axis.
Patent DE-19701843-C1 (DE)
Title: Micromechanical structure formation method
Inventor: LAERMER FRANZ DR
IPC: G01P15/08
Filed: 1997-01-21
Granted: 1998-04-30
Abstract: The structure formation method uses a layered plate (100) having a dielectric layer (3) between (2) silicon layers (1,2), the dielectric layer having (2) silicon oxide layers (4,6) and an intermediate silicon nitride layer (5). Several troughs (12) are etched in one silicon layer (1), which has a thickness of up to (5) times less than the other silicon layer (2) before etching a recess (10) in the latter using an etching solution.
Patent DE-19702700-C1 (DE)
Title: Height-adjustable towing device
Inventor: HALABIYA SABAH
IPC: B60D1/46
Filed: 1997-01-25
Granted: 1998-04-23
Abstract: A belt-type component (44) is fixable at least with an upper and a lower area on the vehicle or the guide component (12). It has a central area with at least one roller (28) rotatably arranged on the retainer (14) is in rollable, frictional or positive engagement. A rotary drive is provided for rotating the at least one roller in engagement with the belt-type component. At least the central area of the belt-type component is flexibly formed and a peripheral surface at least partly winds around at least one roller. At least two rollers located in one plane are arranged with parallel rotary axes on the retainer and the belt-type component winds around the rollers in a counterpoised manner.
Patent DE-19802820-C1 (DE)
Title: Kraftfahrzeug-Stufengetriebe
Inventor: SEUFERT MARTIN
IPC: F16H3/00
Filed: 1998-01-26
Granted: 1999-12-16
Abstract: Ein Kraftfahrzeug-Stufengetriebe in Vorgelegebauart ist mit einer von einer Motorausgangswelle (12) über eine Trennkupplung (14) antreibbaren Getriebeeingangswelle (16), mit einer in Verlängerung der Getriebeeingangswelle (16) angeordneten Getriebeausgangswelle (20) sowie mit einer zur Getriebeausgangswelle (20) parallelen Vorgelegewelle (22) versehen. Es weist ferner eine Mehrzahl von Radsätzen (30, 36, 42, 48, 54, 60, 66) zum Einstellen von Gängen (1., 2., 3., 4., 5., 6., R) des Getriebes (10) auf, wobei Radsätze (30, 42, 48, 54, 60, 66) jeweils ein Losrad (34, 46, 52, 58, 64, 70) umfassen und die Losräder (34, 46, 52, 58, 64, 70) über Schaltkupplungen (73, 74, 76, 77, 79, 80) zum Einlegen von Gängen (1., 3., 4., 5., 6., R) mit einer sie tragenden Welle (20; 22) drehfest verbindbar sind. Ein Radsatz (36) eines weiteren Ganges (2.) ist über eine Reibungskupplung (82) schaltbar. Schließlich ist zum Vermindern eines Schaltrucks während eines Gangwechsels die Reibungskupplung (82) beim Betätigen einer der Schaltkupplungen (73, 74, 76, 77, 79, 80) in Eingriff bringbar. Ein Zahnrad (38) des Radsatzes (36) des weiteren Ganges (2.) ist auf einer zur Getriebeausgangswelle (20) parallel angeordneten Nebenwelle (94) angeordnet. Eine Drehmomentverbindung ist von der Motorausgangswelle (12) über die Reibungskupplung (82) zu dem Radsatz (36) des weiteren Ganges (2.) herstellbar (Fig. 1).
Patent DE-19806324-C1 (DE)
Title: Fractionation of refinery feedstock comprising gas condensates and light crude
Inventor: DAS BIMAN
IPC: C10G5/06
Filed: 1998-02-05
Granted: 1999-06-24
Abstract: In pre-fractionation, some heavy naphtha is separated and extracted as a byproduct. To prevent it from mixing with feedstock in the pre-fractionation column, a partition intervenes between feedstock and separated heavy naphtha. An Independent claim is included for the plant, including main column and pre-fractionation column, from the top of which, liquefied gas and light naphtha are taken. From near the pre-fractionator base, the heavy fraction is supplied to the main column. The pre-fractionator has a central vertical partition extending over part of its height. The feed enters on one side of it, the extraction line leaves above the intermediate bottom, on the other side. The line takes off the heavy naphtha separated on the other side, over the intermediate bottom.   Preferred features: kerosene and gas oil are recovered by side-stream steam-stripping whereas the solvent fractions are recovered directly as pure fractions. Heavy naphtha separated during pre-fractionator and residual heavy naphtha forming the head product of main fractionation are combined and cooled together. The light fraction from pre-fractionator enters a stabilizer where it is separated into liquefied gas and light naphtha. 25%-60% or more of heavy naphtha is separated from the feedstock.  Further preferred details of the plant construction, including relative dimensions of  the partition in the pre-fractionation column, are disclosed.