baber/WOPTO huggingface dataset:
Patent WO-0111145-A1 (WO)
Title: Bürstenwelle zur reinigung von gleisanlagen
Inventor: WENZEL JUERGEN
IPC: E01B27/06
Filed: 2000-07-25
Abstract: Die Erfindung betrifft die Ausgestaltung einer Bürstenwelle zur Reinigung von Gleisanlagen, wie sie üblicherweise querliegend in Gleis-Stopfmaschinen und dergleichen Baumaschinen eingesetzt wird. Aufgabe der Erfindung war es, eine Konstruktion einer Bürstenwelle zur Reinigung von Gleisanlagen zu schaffen, bei der bei weiterer Erhöhung der Standfestigkeit der Borsten ein sicheres Befestigen und schnelles einfaches Wechseln möglich ist. Die Aufgabe wird gelöst, indem die Grundform der Bürstenwelle mit radial kraftschlüssig befestigten Hülsen, die am äusseren Ende vorzugsweise aufgebördelt sind, beibehalten wird. Diese weisen radial auf dem Umfang partiell begrenzt und einander gegenüberliegend Ausnehmungen auf. Vorzugsweise sind jeweils 2 Ausnehmungen einander gegenüberliegend und mit ihrer gemeinsamen Mittelachse durch die Mittelachse der Hülse führend angeordnet. In diese Hülsen werden Elastomerstücke, vorzugsweise mit minimiertem Einbauspiel und bis zum Grund der Hülse reichend, eingeschoben. Die Hülsen mit den eingesteckten Elastomerstücken sind von durch die Ausnehmungen hindurchführenden Arretierungselementen durchdrungen.
Patent WO-0147101-A1 (WO)
Inventor: SEWALD DIETER
IPC: H03B5/12
Filed: 2000-12-19
Abstract: L'invention concerne un circuit oscillateur et un circuit mélangeur qui présentent en partie les mêmes composants. Le circuit mélangeur comporte au moins deux éléments de commutation. Leurs sorties sont couplées dans chaque cas de manière croisée aux entrées de commande de l'autre élément de commutation, dans chaque cas par l'intermédiaire d'un élément de rétroaction. Ledit élément de rétroaction est aménagé, dans chaque cas, de manière à permettre en outre un fonctionnement en mode oscillateur du circuit oscillateur/mélangeur.
Patent WO-0165421-A1 (WO)
Title: Verfahren und anordnung zur modellierung eines systems
Inventor: HAFT MICHAEL
IPC: G06F17/50
Filed: 2000-12-21
Abstract: Bei dem Verfahren und der Anordnung zur Ermittlung mindestens eines Teilmodells eines Modells eines Systems, wobei ein Zustand des Systems durch Zustandsgrößen beschrieben wird und wobei mindestens eine der Zustandsgrößen eine diskrete Zustandsgröße ist, werden mehrere Sätze von Werten der Zustandsgrößen bestimmt. Aus den Sätzen wird eine Wahrscheinlichkeitsverteilung für die Zustandsgrößen ermittelt. Unter Verwendung der Sätze und der Wahrscheinlichkeitsverteilung für die Zustandsgrößen ermittelt. Unter Verwendung der Sätze und der Wahrscheinlichkeitsverteilung für die Zustandsgrößen und unter Verwendung eines statistischen Lernverfahrens wird das Teilmodell das System unter Voraussetzung der Wahrscheinlichkeitsverteilung für die Zustandsgrößen beschreibt.
Patent WO-0165684-A1 (WO)
Title: Verfahren und sendeschaltung zur erzeugung eines sendesignals
Inventor: FUENFGELDER HELMUT
IPC: H03F1/32
Filed: 2001-03-02
Abstract: Beschrieben wird ein Verfahren zur Erzeugung eines Sendesignals, bei dem die Ausgangsleistung mittels einer Verstärkerschaltung variiert wird. Dabei wird ein Teil des Sendesignals hinter der Verstärkerschaltung zur Gewinnung eines Ist-Signals für eine Phasenregelschleife zurückgekoppelt. Die Verstärkerschaltung wird mit einer Brücke innerhalb der Phasenregelschleife derart überbrückt, dass die Leistung eines über die Brücke übertragenen Signals allein ausreicht, um das Ist-Signal zu gewinnen. Bei hoher Ausgangsleistung der Verstärkerschaltung ist die Leistung des über die Brücke übertragenen Signals im Verhältnis gering. Die durch die Brücke und die Verstärkerschaltung erzeugten Phasendrehungen sind bei kleinen Ausgangsleistungen aneinander angepasst.
Patent WO-02069545-A1 (WO)
Inventor: WEBER MICHAEL
IPC: H04L1/00
Filed: 2002-02-04
Abstract: The invention relates to a method for the error correction of a data signal transmitted by means of a channel 6-6'), comprising data blocks with provided error check information (1), whereby the data signal is firstly decoded by computation with softbit information. In a subsequent step the error check information is evaluated with reference to the data block. When a single bit error in a message bit occurs on evaluation of the error check information, a correction of the single bit error (13) will only be carried out when a condition, dependent on the softbit information (SB) is met.
Patent WO-02066931-A1 (WO)
Title: Sensoranordnung zur erfassung der lage eines elektromagnetisch bewegten ankers
Inventor: SCHEMPP ROLAND
IPC: G01D5/243
Filed: 2002-02-09
Abstract: Es wird eine Sensoranordnung zur Erfassung der Lage eines elektromagnetisch bewegten Ankers (2) vorgeschlagen, mit mindestens einer Arbeitsspule (4, 4a, 4b; 7) zur Erzeugung eines Magnetfeldes mit dem der Anker (2) bewegbar ist und mit mindestens einer mit einer Wechselspannung beaufschlagten Messspule (5; 6) zur Erfassung elektrischer Grössen in Abhängigkeit von der Ankerstellung. Sowohl die Arbeitsspule (4, 4a, 4b; 7) als auch die Messspule (5; 6) sind mit der Wechselspannung beaufschlagbar, wobei die elektrischen Grössen bei einer Wechselspannung mit konstanter Frequenz durch eine Messung der Phasenverschiebung zwischen dem Strom und der Spannung in der jeweiligen Spule (4, 4a, 4b; 7) und bei einer Wechselspannung mit veränderlicher Frequenz durch eine Erfassung der Änderung der Resonanzfrequenz eines Schwingkreises mit der jeweiligen Spule (5; 6) erfassbar sind.
Patent WO-03006816-A1 (WO)
Title: Kraftstoffeinspritzventil für brennkraftmaschinen
Inventor: MACK GERHARD
IPC: F02M47/02
Filed: 2002-07-10
Abstract: Kraftstoffeinspritzventil mit einem Gehäuse (1), in dem in einer Bohrung (9) eine äussere Ventilnadel (10) angeordnet ist, die mit einem Ventilsitz (23) zur Steuerung wenigstens einer Einspritzöffnung (20) zusammenwirkt. Im Gehäuse (1) ist ein kraftstoffgefüllter Druckraum (14) ausgebildet, der eine Druckschulter (13) an der äusseren Ventilnadel (10) beaufschlagt, so dass die äussere Ventilnadel (10) eine vom Ventilsitz (23) weg gerichtete Öffnungskraft erfährt. Durch den Druck in einem ersten Steuerraum (28) wird die äussere Ventilnadel (10) zumindest mittelbar in Richtung des Ventilsitzes (23) beaufschlagt, wobei der Druck im ersten Steuerraum (28) gesteuert werden kann. In einer Längsbohrung der äusseren Ventilnadel (10) ist eine innere Ventilnadel (12) längsverschiebbar angeordnet, die wenigstens eine zusätzliche Einspritzöffnung (20) steuert und die eine vom Druck im Druckraum (14) beaufschlagbare innere Ventildichtfläche (26) aufweist, durch die eine Öffnungskraft auf die innere Ventilnadel (12) wirkt.
Patent WO-03025681-A1 (WO)
Title: Verfahren zur herstellung eines zifferblattes und danach hergestelltes zifferblatt
Inventor: KNEER BERNWARD
IPC: B41M5/24
Filed: 2002-08-29
Abstract: Bei einem Verfahren zur Herstellung eines Zifferblattes wird ein Grundkörper (1) zunächst mit zumindest einer Lackschicht (6, 7) versehen. Anschließend wird zur Erzeugung von Skalenstrichen und/oder Ziffern (4) und/oder Markierungen (8) die Lackschicht (6, 7) mittels eines Laserstrahles partiell entfernt.
Patent WO-03060585-A1 (WO)
Inventor: FINZEL LOTHAR
IPC: G02B6/44
Filed: 2003-01-16
Abstract: The invention relates to a method for laying one or more fibre optic cables in a gas conduit, in addition to a corresponding cable laying device. At least one gas-tight tube is inserted into a gas conduit. The ends of the tube or tubes are fed into and out of the gas conduit in a gas-tight manner. At least one fibre optic cable is then introduced into the gas-tight tube or tubes. This permits standard cable to be used for installation in gas conduits.
Patent WO-03081020-A1 (WO)
Inventor: YILDIRIM FEVZI
IPC: F02M47/00
Filed: 2003-01-29
Abstract: The invention relates to a fuel injection valve (1), especially an injection valve for fuel injection systems of internal combustion engines, which comprises a piezoelectric or magnetorestrictive actuator (4) that actuates, by means of a hydraulic coupler (13), a valve closing body (18) that is configured on a valve needle (17) and that interacts with a valve face (20) to give a sealing seat. The hydraulic coupler (13) is provided with a master piston (12) and a slave piston (14). A coupler gap (15) defined between the master piston (12) and the slave piston (14) is dimensioned so as to be closed when the fuel injection valve is cold and to gradually open due to a temperature-induced length change of the actuator (4) with increasing temperature of the fuel injection valve (1).
Patent WO-2004023777-A1 (WO)
Inventor: KASTELEWICZ GEORG
IPC: H04L12/14
Filed: 2003-07-30
Abstract: L'invention concerne un procédé de déduction automatique dans une structure comprenant un réseau de télécommunication (1) et un autre réseau de télécommunication (2). Selon ledit procédé, des données sont échangées par voie électronique selon une norme de protocole CAP/INAP entre un système serveur utilisateur (3) et un système de commutation (4), couvert par le réseau de télécommunication (1), tout comme entre une interface (7) dans l'autre réseau de télécommunication (2) et le système de commutation (4).
Patent DE-1908718-A1 (DE)
Title: Turbulence formed lignin cellulose - agglomerates
Inventor: DIETER PELIKAN DIPL-HOLZWIRT H
IPC: B01F33/40
Filed: 1969-02-21
Abstract: The fibrous agglomerate is made by twirling the fibres (partic. lignin-cellulose) in a turbulent gas-steam or air space. Fibrous agglomerates compounded with mouldable PVC under pressure can be used for sound and heat proofing.
Patent DE-1932371-A1 (DE)
Title: Semi-conductor chips
Inventor: CALOU GEORGES
IPC: H01L21/304
Filed: 1969-06-26
Abstract: A semi-conductor plate is fixed to an extensible foil covered with a tensioned pressure foil, then crushed by pressing it between the foils on to a shaped tool. The edges of the broken segments are separated immediately after breaking by the shape of the tool and/or the expansion of the foils. Spec. the extensible foil consists of soft PVC.
Patent DE-1934916-A1 (DE)
Title: Rotary furnace charging device
Inventor: FELSCH RUDOLF
IPC: F23G5/44
Filed: 1969-07-10
Abstract: The feed shaft consists of two chambers separated by an inclined, movable floor. The lower chamber is lined with cooling elements. Its bottom is horizontal or inclined towards or projecting into the rotary drum. A ram selectively reciprocates over the bottom. The upper chamber is selectively moved between a closed and an open position by a slide in synchronisation with the motion of lower chamber bottom. It is selectively coupled to a feed device which moves via an inclined guide between a charging and a discharging position. Liquid or pasty waste products can be selectively introduced through lateral opening in the shaft.
Patent DE-1936993-A1 (DE)
Title: Build-up cylinder for wide-base radial tyres
Inventor: BLUM HEINRICH
IPC: B29D30/24
Filed: 1969-07-21
Abstract: The apparatus has a shaft with two axially mobile sleeves, at the outer ends of which the edges of the reinforced bellows or casing are secured. Inside the later are two small, impermeable bellows which are secured along their edges at the sleeve ends. Inflation of the bellows gives the outer casing its tyre shape. More spec., intermediate bellows are interposed between the small bellows and the casing.
Patent DE-1947825-A1 (DE)
Title: Electrolytic copper refining in aqueous - electrolytes
Inventor: JAHNCKE ENNO DIPL-ING
IPC: C25C1/12
Filed: 1969-09-22
Abstract: Process partic. suitable for electrolytic production of Cu wire by electro-forming takes place in aqs. electrolytes using granulated Cu on horizontal electrodes as anodes. Several insoluble horizontal plates are superimposed equidistantly in electrolysis vessel. Anode granulates are applied in uniformly thick layers to the top side of each electrode plate, except the top plate. Each electrode plate is insulated over its whole area against the inner wall of the container. The electrode plates are switched consecutively in series where bottom sides are switched on as cathodes and top as anodes. The electrolyte is led by conduits into each electrolysis chamber formed by two superimposed plates and led off through discharge devices.
Patent DE-2038703-A1 (DE)
Title: 3-amino-5-n-undecyl-1,2,4-oxadiazole soil - nematocide and herbicide
Inventor: BREUER HERMANN DIPL-CHEM DR
IPC: C07D271/06
Filed: 1970-08-04
Abstract: Title compound and its salts are useful in controlling soil nematodes and the growth of aquatic weeds. The cpd. while being toxic to soil nematodes is non-phytotoxic to plants growing in soil. Against aquatic weeds, concns. of 0.001-2 ppm are effective. compds. are prepd. by reacting cyanamide with dodecanoyl chloride in C6H6-Et3H gives dodecanoyl cyanamide which with NH2OH-CHl in pyridine gives the prod.
Patent DE-2109664-A1 (DE)
Title: Ion selective electrode
IPC: G01N27/333
Filed: 1971-03-01
Abstract: Electrode comprises an electroinsulating holder, through which an electric conductor is passed; the free end of this conductor is immersed, as an electrode, in a standard electrolyte solution contained in a hoodlike cap screwed onto the holder; in the top of the cap there is an opening - closed by a membrane permselective for the ion, whose activity is to be determined. The construction of this electrode is simpler then that of the known electrodes of this type. The electrode is esp. sensitive towards Ca2+, K+, Na+, Cl-, I-.
Patent DE-2115626-A1 (DE)
Title: Thieno-isothiazole monoazo dyes - for cellulose esters polyamides and polyesters
IPC: C09B29/033
Filed: 1971-03-31
Abstract: The dyes are of formula (in which R1 is H, R2 is H or methyl, or R1 and R2 together form a tri- or tetra-methylene chain, Z is H, Cl, methoxy, ethoxy, acetylamino, propionylamino or methyl, R3 is H, methoxy or ethoxy, R4 is H, 1-4C alkyl, 2-3C hydroxyalkyl, 3-7C alkoxyalkyl, cyanethyl, 4-7C alknoyl oxyalkyl, 4-7C carbalkoxy-ethyl, chlorethyl, acetoacetoxyethyl, gamma-acetylaminopropyl, benzyl, phenylethyl, phenyl, methoxyphenyl or ethoxyphenyl and R5 is 1-4C alkyl, 2-3C hydroxyalkyl or 3-7C alkanoyl oxyalkyl.) They are red to blue in colour and give on textiles of cellulose esters, polyamides or pref. polyesters, shades with good fastness esp. thermal resistance.
Patent DE-2131447-A1 (DE)
Title: Milk crumb prepn - for milk chocolate prodn
Inventor: ISADORE RUSOFF IRVING
IPC: A23G1/00
Filed: 1971-06-24
Abstract: Process for the prodn. of milk crumb compositions containing from 50 - 70% sweetening agent, pref. sucrose; 25 - 45% milk solids and from 2.5 - 7.5% chocolate liquor comprises (a) blending the dry ingredients; (b) passing the mixture thrugh an extruder with the addition of 1 - 3% H2O and at 220 - 260 degrees F for a period of time of 1 - 3sec; (c) cooling the extrudate to 65 - 75 degrees F and (d) comminuting the cooled extrudate so that about 60% passes through a 60 mesh screen.
Patent DE-2132784-A1 (DE)
Title: Combined hardening and annealing of tubes - by induction heating
Inventor: RICHTER EUGEN
IPC: C21D9/08
Filed: 1971-07-01
Abstract: The tube, which is pref. rotated about its longitudinal axis, is fed in one direction by means of rollers through an inductor and over a water spray device so that the tube is hardened. It is then fed in the opposite direction through the inductor so that the tube is annealed. The rate at which the tube is fed during the hardening process, is lower than the rate at which the tube is fed in the opposite direction, i.e. during the annealing process.
Patent DE-2137875-A1 (DE)
Title: Emulsifier addn - to astringent compsns for impregnating wadding esp for catamenial napkins
IPC: A61L15/48
Filed: 1971-07-29
Abstract: Absorbent fibre material, for hygienic and medicinal purposes, esp. sanitary towels, impregnated with astringents, esp. Al salts, and opt. antiseptic agents and deodorants, also contains esp. non-ionogenic or cation-active emulsifiers, in sufficient amount to set absorption rate to 15-180 sec/5 g fibrous wadding. Cellulose wadding (cellucotton) and/or cotton wool and/or broken cellulose and/or other materials, as a bandage layer covered by fibre web or gauze which is opt. dyed on one or both sides and provided with an embossed or sealed edge may be impregnated by (1) saturating with aq. soln. of impregnating agent, centrifuging to expel excess water and drying esp. with heat, or by (2) spraying with impregnating agent and drying.
Patent DE-2166824-A1 (DE)
Title: Ultrasonic atomiser for medicinal substances - uses quartz crystal connected to feed pipe to produce pressure waves in fluid
IPC: A61M11/00
Filed: 1971-09-14
Abstract: The atomiser for medicinal substances comprises an electrically energised ultrasonic vibrating element (26), and a generator for energising the vibrating element, combined to form a hand-held structural unit. Pref. the generator and vibrating element are mounted separately and are insulated against vibrations. The vibrating element may be supported on one of its vibrating surfaces (27) on a relatively large first mass (29, 11, 25), while another vibrating surface (28) is connected to a tool (12) which is of smaller mass, so that the tool is vibrated by the vibrating element without the first mass being subject to vibrations.
Patent DE-2302686-A1 (DE)
Title: Cast iron valve seat inserts - with large graphite content to give adhesive wear resistance when using lead free fuels in motor car engines
Inventor: WOELKER KARL
IPC: F01L3/02
Filed: 1973-01-19
Abstract: Cast iron internal combustion engine components contg. more than 3.0% graphite in a total carbon content of 3.8% min. (pref. 3.2% in 4.05%), and 0.5-3.0% Si, 0.2-1.5% Mn, 0.04-0.7% P, 0.05-1.5% Sn, 0.1-2.5% Ni, 0.05-1.5% Mo, rest Fe. The basic structure can be pearlitic or a hardened and tempered structure ranging from pearlite to martensite, in both cases with a graphite content over 3%. The presence in the structure of graphite above the eutectic amount confers exceptional resistance to the adhesive wear of mating surfaces, e.g. valves and valve sealts, even when using lead-free petrol.
Patent DE-2306832-A1 (DE)
Title: Saddle tree contg. hard polyurethane foam - with a polyurethane inlay reinforcing panel extending over the full width in the waisted region
Inventor: GOEDICKE ERNST
IPC: B68C1/02
Filed: 1973-02-12
Abstract: The panel, of required contour, is laid in a mould, curved to the saddle's shape, and a foaming polyurethane mixt. is fed in, to fill the closed mould. Pref. the inlay is fastened in the hard foam.
Patent DE-2310125-A1 (DE)
Title: Crude oil absorber - on sintered granular pumice contg. slaked lime
Inventor: FUELLING WERNER
IPC: C02F1/68
Filed: 1973-03-01
Abstract: The mineral binder consists of granular pumice, sintered at 600-700 degrees C (675 degrees C) and with grain size 0.5-3 mm, contg. 5 wt. % slaked lime. The compsn. may also contain 1-3% of a ground foamed synthetic material, esp. polystyrene powder or flakes up to 3 mm in length. The binder can be used only on dry land, not on water surfaces.
Patent DE-2318637-A1 (DE)
Title: Thixotropic binder-contg. paints - contg. condensate of polyhydric alcohol and aromatic monoaldehyde
Inventor: MURAI KOICHI
IPC: C09D5/04
Filed: 1973-04-13
Abstract: Paint mixt. or compsn. contg. a film-forming binder is rendered thixotropic with a condensate of a 5- or 6-hydric alcohol and an aromatic mono-aldehyde. Thixotropy is improved without affecting transparency and brightness of paints, Pref. alcohols are xylitols and sorbitols and pref. aldehydes are 1-4C alkyl, nitro or amino-substd. benzaldehyde or opt. alkyl or nitro-substd. naphthyl-aldehydes. Condensate quantity added to paint may be 0.001-10 wt.%/w.r.t. binder. Pref. binders are alkyd and tar-epoxy resins.
Patent DE-2324974-A1 (DE)
Title: Revolving galvanizing tumbler drum - has spiral shell walls terminating inside in turnover plate
Inventor: HANSEN OVE RUDOLF
IPC: C25D17/22
Filed: 1973-05-15
Abstract: A revolving galvanising tumbler drum for small mass-produced articles has an outer shell with a spiral shape which terminates near the centre in a turnover plate. This perforated plate extends over the full length of the drum and is joined to a junction box so that fluid passing through the drum can be extracted and discharged through a port on the periphery. The automatic overturning of all articles results in a very uniform distribution and treatment. The fluid circulation through the drum is instrumental for a short precipitation time and for a high and uniform quality of the deposited metal layer.
Patent DE-2325651-A1 (DE)
Title: Low-calorie fat-free milk substitute - for whitening coffee, tea, soups etc
Inventor: FRY WILLIAM GRANT
IPC: A23C11/08
Filed: 1973-05-21
Abstract: Whitening compsn. contains 75-95 wt.% of a sweetening agent (pref. hydrolysed starch having a dextrose equivalent of 10-50); 8-20 wt.% of calcium caseinate; 0.2-1 wt.% of TiO2 pigment (0.05-1.0 u) and a minor amt. of a commercially available agent producing cream or milk taste. The powder is free-flowing, non-hygroscopic, rapidly soluble in hot liquids; it has milk-like feeding inspite of the absence of any fat, and shows sufficient whitening ability.
Patent DE-2348967-A1 (DE)
Title: Pneumatic air spring for vehicles - having line of hollow spherical interconnected air chambers within coil spring
Inventor: HILLE BERND
IPC: F16F13/00
Filed: 1973-09-28
Abstract: This type of air spring has several hollow spherical interconnected air chambers. The chambers are linked by narrow necks and are thus all under the same internal pressure. An inlet valve for inflating the air spring is fitted. The air spring is suitable for fitting to the inside of conventional coil springs. The number of hollow spheres that can be accommodated depends on the height and internal diameters of the spring. The arrangement is simple and requires no relief valve, air reservoirs, flexible pipes, compressor or other ancillary equipment. The spring does however provide a variable spring rate starting at a min. which is that of the coil spring.
Patent DE-2354895-A1 (DE)
Title: Continuous automatic venting arrgmt for liquids - uses a float which controls a gas outlet in horizontal pipes
Inventor: MARRE JOSEF
IPC: F16K24/04
Filed: 1973-11-02
Abstract: The float housing has a cylindrical extension along the bottom part, and the centre line of which is at 90 deg. to the centreline of the housing. The bores of housing and extension intersect so that the two parts are interconnected. A sleeve is mounted in the cylindrical extension which is divided by a longitudinal wall into two flow channels. The outside diameter of the sleeve is locally reduced over the area where extension and float housing interconnect, creating an annular space. Tangential holes are drilled into the two flow channels in this region. Inside the flow channels, sickle shaped swirl plates ae mounted downstream of the tangential holes. The swirl plates ensure that any gas free in e.g. a heating installation during operation can escape into the float housing irrespective of the speed of flow.
Patent DE-2356107-A1 (DE)
Title: Sequencing control with mode of operation unit - delivers mode of operation signals for automatic or manual operation
Inventor: MEIER WERNER
IPC: G05B19/02
Filed: 1973-11-09
Abstract: These signals are applied to a series of sequencing control elements with a step-by-step stores for delivery of control commands. A setting input of a step-by-step store in a sequencing control unit is controlled by an AND circuit for linking the respective mode of operation signal with a signal for external conditions and a precedence signal from a precedence circuit consisting of three gates. The first gate in the precedence circuit forms the precedence signal by conjunctive linking of the step-by-step forward switching signal with the second gate inverse output signal. The second gate forms conjunctive linking of the inverse precedence signal with the third gate output signal; and the third gate forms the conjuctive linking of the mode of operation signal and an external condition signal.