baber/WOPTO huggingface dataset:
Patent DE-4114363-A1 (DE)
Title: Power control circuit for MOSFET with source load - has frequency of pulse oscillator feeding boot strap driver reduced for higher widths
Inventor: RABL HELMUT DIPL ING
IPC: H03K17/687
Filed: 1991-05-02
Abstract: A circuit (4) including a bootstrap circuit purse width modulates the gate voltage of the MOSFET (1). An oscillator (5) with variable frequency produces a pulse sequence as output, and this is fed to the modulation circuit (4).  The pulse frequency of the controllable oscillator is controlled in dependence on the pulsse width. The pulse frequency may be reduced with rise of pulse width.  The pulse frequency may be hold constant until a set pulse width rise has taken place, and then be reduced. ADVANTAGE - Enables operation of MOSFET via bootstrap circuit up to virtually 100 per cent switch on time.
Patent DE-4119959-A1 (DE)
Inventor: WOLFF SIEGFRIED DR
IPC: C08K3/02
Filed: 1991-06-18
Abstract: The invention relates to a process for the preparation of carbon black-filled plastic and rubber mixtures, in which an organosilicon compound is employed and is reacted in situ with the carbon black. <IMAGE>
Patent DE-4122427-A1 (DE)
Title: Polyarylene ether ketone and alkaline earth metal titanate mixt. - useful in motor vehicle engines, aircraft construction and electrolyser technology, giving enhanced mechanical properties
Inventor: LUECKE ANDREAS DR
IPC: C08L71/10
Filed: 1991-07-06
Abstract: Polyarylene ether ketone mixt. comprises: (A) a polyarylene ether ketone exhibiting a melt viscosity (MVI 400/5) of 2-250 cm3/(10 min.) and composed of repeating units of formula (-O-Ar(-L-Ar)x-O-Ar -CO-(-Ar-M)y-Ar-)- (I) and (B) an alkaline earth metal titanate. (Ar = aromatic gp. of 6-12C atoms L. M = -O- or -CO-. x, y = 0-4). Also claimed is the addn. of alkaline earth metal titanates, pref. calcium titanate, to stabilise polyarylene ether ketones of formula (I). Pref. (A) is polyether ether ketone ketone and (B) is pref. calcium titanate, pref. with a mean particle size of less than or equal to 50 micron, pref. 15-40 micron. USE/ADVANTAGE - The use of the polyarylene ether ketone mixt. in applications which require an increased margin of safety, pref. in motor vehicle engines, aircraft construction and electrolyser technology is claimed. The mixt. exhibits enhanced mechanical properties and increased chemical resistance to alkali at high temps. in comparison to prior
Patent DE-4123495-A1 (DE)
Title: Emergency braking in eccentric or crank presses - uses additional gear for converting rotary to translatory movement
Inventor: NAUMANN BERND DR
IPC: B30B1/26
Filed: 1991-07-16
Abstract: Between the motor and the clutch a flywheel is fitted in the primary gear, and at least one additional gear is provided for converting a rotary movement to a linear movement. The input shaft (9) of the additional gear can be coupled by a switch coupling (12) to a fast-running shaft of the secondary gear, and its output component is effectively connected to a thrust crank drive (10). The thrust crank drive shaft or eccentric wheel is kinetically connected via further transmission stages to a further flywheel (11) or the flywheel (2) of the prim. gear between the motor (1) and clutch (3). The additional gear is of the toothed rod-pinion type (8). USE - For emergency braking in eccentric or crank presses processing plate workpieces.
Patent DE-4124152-A1 (DE)
Title: Engaging and disengaging shaft coupling - has inclined guides on the coupling part and insert funnel on coupling sleeve
Inventor: PIELSTICKER KLAUS
IPC: F16D11/14
Filed: 1991-07-20
Abstract: The coupling bolt (5) can be formed with a conical head section as the inclined guide (12). The incline (12) can have at the front a ring groove (13) and bolt attachment (15) provided with a secondary incline. The coupling part (2) and coupling sleeve (3) can be rotated relative to each other. The coupling part can have a multi-hole ring (8) associated with a second funnel guide. USE/ADVANTAGE - The incline guides bring the shaft coupling part and coupling sleeve automatically into positive locking and alignment as they engage with each other.
Patent DE-4124310-A1 (DE)
Title: Seal for rotating shaft - has inner and outer housing each of which has attached sealing ring
Inventor: KATZENSTEINER JOSEF ROMAN
IPC: F16J15/3256
Filed: 1991-07-23
Abstract: The seal for a rotating shaft has an inner (2) and an outer housing (3). The inner housing (2) has a U-shaped cross-section and rotates relative to the outer housing (3).  The inner housing (2) supports a sealing ring (13) and the outer housing (2) supports a sealing ring (5). The sealing ring (13) has one or more sealing lips (14,15,16) which press against the inner surface of the outside wall (17) of the outer housing. The sealing ring (5) which is attached to the outer housing has two sealing lips (7,8) which are pressed against the outer surface of the inner wall (10) of the inner housing (2) by two garter springs (9). USE - Sealing of rotating shafts for cross-country motor vehicles.
Patent DE-4127230-A1 (DE)
Title: Semi-continuous prodn. of di:alkyl ether(s) - by dehydration of alcohol(s) in presence of sulphonic acids with distn. of water, followed by distn., and re-using acid-contg. fraction
Inventor: KLEIN JOHANN DR
IPC: C07C41/09
Filed: 1991-08-16
Abstract: Semi-continuous prodn. of symmetrical dialkyl ethers (I), comprises dehydration of alcohols (II) in the presence of sulphonic acids (III) with continuous removal of reaction water, followed by sepn. of (I) from (III) and esters thereof by distn. The fraction contg. (III) and/or its ester is reused as the dehydration catalyst. (II) are alcohols of formula ROH (with R = opt. branched opt. OH-substd. 6-22C aliphatic hydrocarbyl with 0, 1 2 or 3 double bonds, or benzyl) and (III) are acids of formula R'SO3H (with R' = 1-4C alkyl or opt. alkyl-substd. aryl); dehydration is carried out at 180-250 deg. C in the presence of 0.05-10 t. % (III) (w.r.t amt. of II), and the prod. is sepd. by fractional distn., opt. under reduced pressure, to give either fraction (I) and a fore-run fraction and/or residue contg. (III) and/or ester, which is mixed with fresh (II) and used again, pref. in amts. such that the new reaction mixt. contains 0.05-10 wt. % (III) or its ester. USE/ADVANTAGE - (I) are useful, eg., as foam suppressants and as emulsifiers for polymerisation reactions and in cosmetics. The invention enables the semi-continuous prodn. of (I) in high yield, with optimal conversion of (II), without the need to neutalise or regenerate the catalyst.
Patent DE-4128328-A1 (DE)
Title: Two-flow valve for IC engine - uses combination of plate valve and ring valve
Inventor: KLOSA REINHOLD
IPC: F01L3/20
Filed: 1991-08-27
Abstract: The two-flow vlave is for an IC engine. It consists of a solid poppet valve or plate valve (3) and a hollow poppet valve or ring valve (2) in which the ring valve comprises a hollow shaft (2a), connecting pieces (2b) and a valve ring (2c). The spring (8) acting on the ring valve is held by the spring plate (10) and valve actuation is achieved through a single lever (20) and a forked lever (19) which contact the valve play compensator (21) on one side and the ring valve on the other. USE/ADVANTAGE - Valve arrangement which offers high efficiency and low fuel consumption in a cost effective IC engine.
Patent DE-4135403-A1 (DE)
Title: Permanent magnet of lanthanide iron@ alloy - contains boron in main phase with second boron-free phase contg. different additive to increase coercivity
Inventor: VELICESCU MIRCEA DR
IPC: H01F1/057
Filed: 1991-10-26
Abstract: Permanent magnet of the Ln-Fe-B type (Ln = rare earth metal(s), including Y), with the tetragonal phase Ln2Fe14B (I) as main phase, also contains a B-free phase (II) contg. Ln and Fe together with other element(s) M, where M is Bi, Ga, In, Tl, Ge, Pb, As, Sb, Se and/or Te. Pref. (II) has the compsn. Lb6Fe13M. The magnet contains up to 5, pref. 1-3.5 (wt.% M and may also contain Ti, Ni, V, Nb, Ta, Cr, Mo, W, Mn, Al, Sr, Sn and/or Hf. Pt. of the Fe may be replaced by Co. The magnet is produced by mixing alloy powder contg. Ln, Fe and B with a powder contg. M, pref. FeM, CoM, AlM or NbM alloy or M powder, compressing and sintering. ADVANTAGE - (II) increases the coercivity and improves the temp. coefft. or coercivity. In an example, magnets contg. (A) 0, (B), 0.5, (C) 1.0, (D) 2.5, (E) 4.0, (F) 5.0% Bi were prepd. from (A) 100, (B) 90, (C) 80, (D) 50, (E) 20, (F) 0% alloy powder (contg. 36.9% Ln, including 4.05% Dy, 0.97% B, 0.44% Al, 0.025% C, 0.19% O, 0.025% N, rest Fe) and (A) 0, (B) 10, (C) 20, (D) 50, (E) 80, (F) 100% BiFe powder (ca. 98% Bi). The (mixed) powder was ground, compressed, sintered 1-16 h at 1060-1115 deg.C and tempered at 950-580 deg.C, giving magnets with density values of over 7.55 to over 7.60 g/cc. The properties at room temp./150 deg.C were remanence (A) 1.1/0.92, (C) 1.06/0.89 T; and coercivity (A) 24, 21.3/4.3, (C) over 24/6.4 kOe.
Patent DE-4138601-A1 (DE)
Title: Water-powered electrical energy generation system - has containers fitted to endless transmission chain between deflection rollers carried by spaced catamaran punts
Inventor: HOEHNE HERBERT
IPC: F03B17/06
Filed: 1991-11-23
Abstract: The energy generation system, floating on the water surface, comprises a number of catamaran punts (1, 1') spaced apart in the longitudinal direction, which can move vertically up and down fixed guides (3, 3'), preventing their sidewards movement. Deflection rollers (5, 5') for an endless transmission chain (6) are mounted on the punts (1, 1') with containers (7) attached to the chain (6) held in a horizontal position by the flow force of the water, the rotation of the rollers (5, 5') driving a generator. The containers (7) may have hollow spaces filled with air or gas, e.g. helium. USE - For efficient conversion of water flow energy into electricity.
Patent DE-4210379-A1 (DE)
Inventor: OHNO TADAYOSHI
IPC: G06K15/00
Filed: 1992-03-30
Abstract: In a thermal dot-matrix printer which is adapted to both write and erase on a substrate which clarifies and opacified under different thermal regimes, the dot-printing and dot-erasing signals are selectively fed to the thermal printing elements of a single printhead, and all such signals are composed of a sequence of pulses. As described writing requires more energy than erasure, and a dot-writing signal therefore has more pulses than an erasure signal. The pulse patterns disclosed for both dot-writing and dot-erasure signals include:-     (a) a regular sequence of rectangular pulses (50% duty cycle)   (b) a broad pulse followed by (a) (c) a sequence of progressively narrower pulses (duty cycle > 50% --> duty cycle < 50%)   The invention may be applied to erasing and rewriting a visible indication representing the remaining value of a magnetically coded consumable-credit card with thermal recording layer (28, Fig. 2). <IMAGE>
Patent DE-4214509-A1 (DE)
Title: Residual heat indicating system for electrical cooking rings of ceramic hob - has indicating light connected to holder with two fixing arms gripping flat round pan type metal shaped ring part cladded on inside with insulating material e.g. ceramic fibre
Inventor: PISTOR MAX FRANZ JOSEF
IPC: H05B3/74
Filed: 1992-05-01
Abstract: The system uses an insulating material which has at least one heating spiral embedded in it. Connection parts are held at the outer edge of the metal shaped part, for the electrical connection of the heating spiral. Also an electrical transmitting part is connected with a thermometer probe, extending in the mouth plane of the metal shaped part and connected with the indicating light. The indicating light (7) is connected with a holder (9), which has two fixing arm sections (10, 11) parallel to each other. The first section (10) grips under the base of the metal shaped part in the vicinity of the hole (8) lying near the edge. A stop can be placed in the hole (8). The second section (11) has a locking part gripping over the metal shaped part (1). ADVANTAGE - Cost effective fixing of indicator light for residual heat.
Patent DE-4218128-A1 (DE)
Title: Evaluating effectiveness of floor cleaner - involves pulling test body across cleaned floor then comparing with fouling reference images
Inventor: SCHREIBER MANFRED
IPC: G01M99/00
Filed: 1992-06-02
Abstract: The method involves first wetting a test body, loading it with a defined wt., pulling it over a defined area of the cleaned floor and then evaluating the quality of the cleaner by comparing the test body with defined views of different degrees of fouling. The arrangement contains a press. plate (1) of several parts with an associated wt. plate (2), pulling device (3) and foam body.  A test body (5) is fitted over the foam body (4) and attached to the press. plate (1). USE/ADVANTAGE - The method enables objective evaluation of the effectiveness of a floor cleaner.
Patent DE-4222745-A1 (DE)
Title: Foldable table-top for wheelchair securable to its armrest - has table-top vertical position arrester, releasable manually by lever on table-top underside
Inventor: PUSCH EWALD
IPC: A61G5/10
Filed: 1992-07-10
Abstract: The mechanism (1) of the foldable table-top (14) has a base (3) for securing to the wheelchair armrest bracket (2). The base is coupled to the table-top by a joint (9), and the table-top is held in its vertical position by an arrester (18, 20). The arrester is releasable by a lever (31) on the table-top underside at its vertically foldable section. The lever can be actuated by the patient's hand away from the joint. Pref. the lever is fitted near the highest folding edge of the table-top. USE/ADVANTAGE - Robust design of foldable table-top for wheelchair is securable to its armrest and is simple to operate by patient.
Patent DE-4228690-A1 (DE)
Title: Waste water clarification appts.
Inventor: GOERLICH FRANZ ING
IPC: C02F3/12
Filed: 1992-08-28
Abstract: The sewage facility (1) has a storage poind (6) which has in incoming channel (7) from the cleared water duct (5) and a similar outgoing channel (11) connecting to this duct. By means of a valve (10) incoming waste water (3) can be either fed to the pond by one channel (8), or fed directly (4) to the cleared water run-off duct.
Patent DE-4232468-A1 (DE)
Inventor: BACKMAN KEITH DR
IPC: C12N1/20
Filed: 1992-09-28
Abstract: Microorganisms for the production of tryptophan and a process for producing the same are disclosed. These microorganisms are characterised by a deregulated tryptophan metabolism and by a feedback-resistant serA-allele deregulated serine metabolism. When the disclosed strains were fermented, it has been surprisingly shown that the strains with the highest tryptophan yield are those which contain a feedback-resistant serA-allele with a Ki value for serine from 100  mu M to 50 mM and a deregulated tryptophan metabolism having a trpE-allele with a Ki value for tryptophan from 0.1 mM to 20 mM.
Patent DE-4233398-A1 (DE)
Title: Convertible chair and trolley especially for transporting picnic equipment - has tubular main frame elements fixed at pivot points, textile seat and backrest
Inventor: BRAUN DIETER
IPC: A47C13/00
Filed: 1992-10-05
Abstract: The seat surface (1) is pivotally mounted (7) between the two side struts of the back support frame (4) and rests on a support (8) which can be locked in position on the two side struts of the front support frame. A storage space is produced between the two side struts of the front support frame (3), while the seat surface acts as the back support surface for the luggage. The front support frame acts as side support (3A). Between the front and back support frame is a horizontal luggage shelf (5) near the ground. The support frame has at least two wheels (6). ADVANTAGE - The picnic chair can be used as well for transporting luggage or picnic material.
Patent DE-4239379-A1 (DE)
Title: Simple versatile and compact drive system for extruders - has square type sealed casing containing output shaft with pressure bearing, input shaft on tapered roller bearings and intermediate shaft
Inventor: THIELE WILFRIED
IPC: B29C48/03
Filed: 1992-11-24
Abstract: An extruder drive system has a casing, an input drive shaft, output drive shaft connected to the screw, and various other features. It has an input toothed rim on the input shaft and similarly one on the output shaft, and at least one intermediate gearwheel on at least one intermediate shaft with toothed rim. The casing has mounting holes and sealed covers. The casing is one-piece with square or rectangular section as seen from in the direction of the input or output shaft. The output shaft is supported by a pressure bearing acting through the output gearwheel on the side opposite that for the screw and against the back-pressure on the screw shaft. This bearing is held on the sealed cover; the input shaft is held at both ends on a tapered roller bearing and a rim cover is located on the motor side only. ADVANTAGE - The design is simple and is versatile and compact.
Patent DE-4240314-A1 (DE)
Title: Prepn of polycarbonate(s) by melt esterification, by degrading polycarbonate from di:phenol - using quat. ammonium or phosphonium cpd as catalyst, prepn. of oligo:carbonate and polycondensation
Inventor: KAUTH HERMANN DIPL CHEM DR
IPC: C08G64/30
Filed: 1992-12-01
Abstract: In the prepn. of polycarbonates by melt esterification, (1) polycarbonates from diphenols of formula (I) are dissolved in monophenols and degraded to oligocarbonates, diaryl carbonates and diphenols at 100-295 deg.C, in presence of quat. ammonium or phosphonium cpds. as catalysts, (2) opt. after sepn. of fillers and/or other additives by filtration, centrifugation, sedimentation or adsorption, a more highly viscous oligocarbonate with Mw 8000-18000 and a ratio of OH/aryl carbonate end gps. between above 25% OH to below 75% aryl carbonate and below 50% OH to above 50% arylcarbonate is prepd. and (3) is condensed at 250-295 deg.C and from below 500 mbars to 0.01 mbars, to polycarbonates with Mw 20,000-100,000. In the formula X = 1-8C alkylidene, 5-12C cycloalkylidene, S or a bond; R = Me, Cl or Br; n = 0-2. USE/ADVANTAGE - The polycarbonates can be extruded or injection moulded, e.g. to films or plates. Appln. is esp. in electrotechnology. Polycarbonate waste can be used. The polycarbonates are of good quality, free from solvent, low in branching or with definite branching, and of good colour.
Patent DE-4241424-A1 (DE)
Title: Heating boiler with fin tubes - has air vent pipe connected to supporting tube immediately below partition in fin holder pipe
Inventor: BOHN ROLF
IPC: F24H1/40
Filed: 1992-12-09
Abstract: The boiler contains a firebox for radiant heating, and fin tubes connected to a fin holder pipe (4) and forming a contact heating surface. An air vent pipe (6) is connected to each supporting tube for a fin tube (3) immediately below the partition (5) in the tube. The partition is located between the inner U-arms of the tube. This partition directs water from the fin holder pipe. Steam may exit through the air vent. ADVANTAGE - Discharges any steam bubbles accumulating in the supporting tube.
Patent DE-4241512-A1 (DE)
Inventor: HERTER EBERHARD PROF DIPL ING
IPC: H04B3/54
Filed: 1992-12-10
Abstract: The invention relates to a process for transmitting data via a heavy current line in which the data are transmitted as a useful signal in a useful band of a useful frequency range and the useful band is at least one order of magnitude higher than the frequency of the low-frequency a.c. voltage on the heavy current line. Interference-free data transmission in the prevailing boundary conditions of a heavy current line is obtained by the invention in that a reference signal is transmitted outside the useful band in the useful frequency range in a narrow reference band and a signal for evaluating and processing the useful signal in the useful band is derived from the reference signal.
Patent DE-4241646-A1 (DE)
Title: Improving, exploiting and or utilising plastics swollen in solvent - by e.g. adding material to them or their solvent and or removing substances and or changing their temp
Inventor: THIELE ANDREAS
IPC: B29B17/02
Filed: 1992-12-02
Abstract: Swollen plastic materials are increased in value and/or utilised and/or exploited by adding partic. new material to them and/or partic. substances are removed from them and/or materials are added to the solvents causing the swelling and/or plastic materials are dissolved by changing the temp. so that they can be used for special applications. ADVANTAGE - Useful by improving its properties. It can make used materials as good as fresh. The plastic materials are not damaged by any factor. As swollen plastics have little mechanical strength they can be reduced to any desired sizes with very little consumption of energy or the use of much plant. Extruders with degassing can be used.
Patent DE-4242553-A1 (DE)
Title: Cleaning roller for clothes, etc
Inventor: GLIENKE PETER O
IPC: A47L25/00
Filed: 1992-12-16
Abstract: A cleaning roller for clothes or similar items has an oblong support (1) with a holding section (2) at the bottom end, a bearing core (3) that extends axially from the holding section (2), and a roll support (4) mounted on the bearing core (3). The roll support (4) consists of a rubber-elastic thermoplastic or plastic/rubber blend with corresponding properties.The holding section (2) could be made of HDPE and the roll support (4) of LPDE.
Patent DE-4242862-A1 (DE)
Title: Solid-state laser
Inventor: HEINEMANN STEFAN DIPL PHYS
IPC: H01S3/106
Filed: 1992-12-18
Abstract: The solid-state laser, pumped by laser diodes, has a piezoelectric film (12) in contact with the laser active medium (11), and with the catcher mirror (R3). An air gap (13) with a given length, is between the laser medium and the catcher mirror, to give a short length to give a longitudinal mode selection through an appropriate selection of mirror (R2,R2) reflectivity. The application of an electrical voltage at the piezoelectric film (12), selectively, gives a choice of separate laser junctions, Q-switches or tunable laser frequencies.The laser medium (11) is an optical pumped solid-state laser crystal or glass, or a semiconductor laser diode. In the event of tuning the laser frequency, the laser medium is shaped and coated that a resonator mode can be ensured by an external mirror. For Q-switches, and selection of separate junctions, the laser medium is shaped and coated to ensure a resonator mode.
Patent DE-4243566-A1 (DE)
Inventor: RITTNER SIEGBERT DR
IPC: C01B31/02
Filed: 1992-12-22
Abstract: Described is a method of separating fullerenes from a fullerene-vapour/soot mixture, according to which a carrier gas is added to the fullerene-vapour/soot mixture, the soot is separated off and the fullerenes in the carrier-gas stream are precipitated out by cooling.
Patent DE-4243626-A1 (DE)
Title: Banknote handling and reading system - has pair of motors with controlled coupling that allows both to be used for banknote transfer during part of cycle
Inventor: GERLIER ANDRE
IPC: G07D7/00
Filed: 1992-12-22
Abstract: A banknote reading system has note entered (2) and transferred to a belt feed system (5,6), that passes the notes through a test unit (3), a stacking unit (8) and a stack (4). The system operates with a drive system (9) that is based around a pair of motors. Output shafts (21,22) mechanically connect with the crank drive (18) stacking unit. Within the drive unit the motors have controlled couplings that allow selective engagement of the feed and stacking units. One or both of the motors may be connected to the banknote feed transfer unit. USE/ADVANTAGE - Allows two motors to be used for feed transfer.
Patent DE-4305137-A1 (DE)
Inventor: FUCIK MILAN
IPC: D04B15/32
Filed: 1993-02-19
Abstract: Needles (4) are guided by sliders (3) on which are provided swing able selecting jacks (5). The selecting jacks are equipped with two guiding butts (51, 52) alternately selectable to be engaged with cam paths (10, 13; 23, 27) to guide the needles in the knitting or non-knitting positions. Means (17) act on the swinging selecting jacks to select the needle at a point where the needles are inserted in both the upper and lower slides. Pushers (30, 31) tilt the sliders to enable transfer of the needles. <IMAGE>