baber/WOPTO huggingface dataset:
Patent EP-0288981-A3 (EP)
IPC: F04B53/06
Filed: 1988-04-26
Abstract: A plunger (1) of a plunger pump is formed with an air vent 
passageway (5) having its one end open to a compression chamber (2) 
and the other end adapted to communicate with a reservoir 
space (7) open to the atmosphere when the plunger (1) comes near its 
top dead point. Air or gas trapped in the liquid sucked 
into the compression chamber (2) will flow into the air vent 
passageway (5) so as to be discharged into the reservoir space (7) 
when the passageway gets into communication with it. Since 
air or gas is removed from the compression chamber (2), the 
pumping efficiency is prevented from decreasing.
Patent EP-0295446-A3 (EP)
IPC: H01C17/28
Filed: 1988-05-18
Abstract: Es wird ein Verfahren zum Herstellen eines niederohmigen 
elektrischen Kontaktes zwischen elektrisch leitenden 
Teilen beschrieben, das sich dadurch auszeichnet, daß die 
Teile mit ihren Kontaktflächen aneinandergepreßt und 
derart gehaltert im Bereich der aneinandergepreßten Kon­
taktflächen kraftschlüssig in Kunststoff eingegoßen 
werden. Des weiteren wird eine Leiterbahnplatte beschrie­
ben, deren Leiterbahnen und metallische Anschlußteile mit 
Hilfe dieses Verfahrens kontaktiert sind.
Patent EP-0306663-A3 (EP)
Title: Fast write saturated memory cell
IPC: G11C11/411
Filed: 1988-07-12
Abstract: In a transistor memory cell of the type wherein an unclamped 
conducting transistor in each of a plurality of memory cells 
connected to a given word line is driven into saturation 
when storing data, the improvement characterized as means 
for discharging the saturation capacitance of the conducting 
transistors prior to writing new data into the cells. This 
discharging means includes an active device with a forward 
low-impedance current direction and a reverse high impedance 
current direction therethrough for each saturation 
transistor. The active device is connected to discharge an 
associated saturation transistor in its forward current 
direction. In one embodiment, the discharging means 
discharges to a word line at an appropriate potential. In a 
preferred embodiment, the discharging means discharges to a 
separate discharge line not connected to the word line. The 
active devices may be diodes. In yet a further embodiment, 
the active devices may comprise diodes with leaky reverse 
bias characteristics. These diodes, in their reverse bias 
current direction, may be used as the memory cell loads. 
Alternatively, a PNP transistor may be used as the memory 
cell load. Resistors may be included in the discharge means 
to prevent word line-bit line voltage clamping.
Patent EP-0303076-A3 (EP)
IPC: C08K5/3477
Filed: 1988-07-20
Abstract: Polyester-polycarbonate blends having increased 
melt viscosity, and useful in such applications as blow 
molding, profile extrusion and thermoforming, are prepared 
by incorporating at least one poly(O- or N-epoxyalkyl-­
substituted) cyclic amide, imide or imidate, preferably 
triglycidyl isocyanurate. They may also contain impact 
modifying polymers.
Patent EP-0303924-A3 (EP)
Title: Fan rotor manufactured from a thin metal disc, and its production method
IPC: F04D29/28
Filed: 1988-08-06
Abstract: It is proposed to solve the problem of designing a fan rotor manufactured from a thin metal disc in such a way that it can be manufactured cost-effectively and at the same time produce a greater air output whilst causing less noise. This is achieved by a special shape of the fan blades. 
<IMAGE>
Patent EP-0312744-A3 (EP)
Title: Internally cooled roll and method for manufacturing the same
IPC: B22D11/16
Filed: 1988-09-01
Abstract: The invention relates to an internally cooled roll in which at least one helical coolant channel (2, 2') is recessed into the core of the roll. The coolant channel (2, 2') is covered by a profile element (7, 7') which, in cross-section, has the shape of a circular surface from which a segment has been cut. The profile element (7, 7') is welded to the core (1) on both sides of the coolant channel (2, 2'). A filling (8) of welding material is provided between adjacent sections of the profile element (7, 7'). The profile element (7, 7') and the filling (8) of welding material are covered with a wearing layer (9).   <IMAGE>
Patent EP-0316680-A3 (EP)
Title: Use of compounds of metal oxides or of metal oxides and non-metal oxides as inorganic pigments
IPC: C09C1/00
Filed: 1988-11-04
Abstract: Use of compounds consisting of metal oxides or of metal oxides and non-metal oxides as inorganic pigments. The inorganic pigments, which contain relatively small amounts of toxic heavy metals, are synthetically produced compounds having a Hollandite structure. These compounds have the composition <IMAGE>  where  A = potassium, rubidium and/or caesium  A<2><+> = strontium,  B<2><+> = nickel, manganese, magnesium, cobalt and/or iron,  C<3><+> = aluminium, chromium, iron, cobalt and/or titanium,  D<4><+> = titanium, silicon and/or tin,  E<6><+> = molybdenum, tungsten, x = 0 to 1, y = 0 to 2, z = 0 to 2, u = 0 to 2, v = 0 to 3, w = 0 to 1.
Patent EP-0319922-A3 (EP)
Title: Device for the optical evaluation of a test band presenting at least one test field
IPC: G01N33/483
Filed: 1988-12-06
Abstract: A device for optically evaluating test strips includes a housing carrying the measuring optics and a test strip holder insertable into and removable from the housing by sliding into and out of a receiving compartment of the housing, with the test strip holder containing all of the surfaces with which the significant portions of test strips come into contact, thereby permitting those surfaces to be easily cleaned upon removal of the test strip holder from the housing. The device also assures proper positioning of an easily inserted test strip, allows for heating of the test field to a fixed temperature, and allows for both empty and dark field calibration of the optical system.
Patent EP-0317049-A3 (EP)
Title: Ultrasonic probe
IPC: G10K11/35
Filed: 1988-07-11
Abstract: An ultrasonic probe 10 includes an elongated housing 12 which contains a window 24 surrounding an ultrasonic transducer 32. The ultrasonic transducer 32 is mounted on a first platform 36. The first platform 36 is in turn mounted on a second platform 38. A motor 44 and linkage arrangement 48 is provided for pivoting the transducer 32. A thumb wheel 16 can rotatably position the transducer 32 as it pivots, allowing ultrasonic imaging of bodily tissue through three hundred and sixty degrees. Further, a position sensor 78 allows for accurate sensing of the position of the transducer 32 as the transducer 32 pivots and rotates. <IMAGE>
Patent EP-0311300-A3 (EP)
Title: Rheometrics and melt flow index measurement
IPC: G01N33/44
Filed: 1988-09-29
Abstract: A viscosity or melt flow index measurement device comprising:  a sample enclosure (125), loading means (90) for applying a sample under pressure to the enclosure,  a restriction or orifice (129) within the enclosure, monitoring means (112) for determining the pressure within the enclosure upstream of the restriction,  an output port (130) in the enclosure downstream of the restriction, temperature control (91,92,76) and monitoring means for determining the sample temperature within the enclosure, control means for initiating and repeating a test cycle under various pressure and flow conditions for a given temperature, measuring means (112) for measuring the pressure and flow conditions within the enclosure, data processing means for computing the viscosity or melt flow index from successive measurements of pressure and flow rate through the output orifice or restriction.
Patent EP-0348708-A3 (EP)
IPC: G01R13/34
Filed: 1989-06-08
Abstract: Die Erfindung betrifft einen Analog-Digital-Umsetzer, der ei­
nen von einem Zähltakt gesteuerten Zähler aufweist. Um den 
Analog-Digital-Umsetzer bei schnellen digitalen Oszilloskopen 
vorteilhaft einsetzen zu können, zählt ein Vorwärts-Rückwärts-­
Zähler mit seinem Zählerstand kontinuierlich innerhalb des Meß­
bereichs um die Nullspannung (OV), und es ist ein Komparator 
(K) vorhanden, der bei Gleichheit des analogen Eingangssignals 
(Ug) und eines dem Zählerstand entsprechenden Signals die Aus­
gabe des Zählerstandes als Digitalsignal veranlaßt.  
     Die Erfindung ist in der elektronischen Meßtechnik für analoge 
elektrische Größen anwendbar.
Patent EP-0375955-A3 (EP)
Title: Melt-holding vessel
IPC: B22D41/00
Filed: 1989-11-25
Abstract: A melt-holding vessel includes a melt-­
holding chamber (13) defined by a bottom wall (40) and 
upstanding side wall (42) of refractory material. The 
side wall includes one or more insulating air pockets (50) 
located in such a manner relative to the chamber as 
to substantially reduce heat loss from the melt in 
the chamber by conduction through the side wall.
Patent EP-0372567-A3 (EP)
Title: Polling communication system with priority control
IPC: H04L12/403
Filed: 1989-12-08
Abstract: A communication system containing: a master 
station (A), a plurality of slave stations (B1, B2, ... 
Bn-1, Bn) each for communicating with the above master 
station (A), a two-way transmission line (101, 102) 
connecting the above master station (A) and the above 
plurality of slave stations (B1, B2, ... Bn-1, Bn). Each 
of the above slave stations (B1, B2, ... Bn-1, Bn) sends 
a request for a further communication with the above 
master station (A), to the master station (A) when its 
own slave station is allowed to communicate with the 
master station (A) and its own slave station has the 
above request. The above master station (A) detects the 
request for a further communication with the above 
master station (A) in a signal sent from a slave 
station, and memorizes a slave station from which a 
request for a further communication with the master 
station (A) is detected, until an allowance is sent to 
the slave station from the master station (A) 
corresponding to the memorizing of the slave station. 
The master station (A) has a cyclic address pointer (54) 
which points out an address of a next one of the above 
slave stations (B1, B2, ... Bn-1, Bn) in a cyclic order 
when no slave station is memorized in the master station 
(A). The master station (A) outputs an allowance to 
communicate with the master station (A): to a slave 
station which is memorized in the master station (A); or 
to a slave station the address of which is pointed out 
by the above cyclic address pointer (54) when no request 
is memorized in the master station (A).
Patent EP-0384042-A3 (EP)
IPC: G01L3/10
Filed: 1989-06-02
Abstract: A magneto-strictive torque sensor for electrically 
contactlessly detecting a torque applied to a rotary shaft 
on the basis of a resulting change in the magnetic 
permeability of the surface of the shaft. Fine dents and 
retainer areas for retaining residual compressive stress due 
to the fine dents are formed on the surface of the rotary 
shaft. According to this arrangement, the process of 
magnetization resulting from the application of an exciting 
magnetic field and of the torque to the rotary shaft 
involves less magnetization due to magnetic domain wall 
displacement and consists principally of reversible magnetic 
rotation, with the result of reduced hysteresis in the 
magnetization process. The reduced hysteresis causes less 
hysteresis involved in torque detection and higher detection 
sensitivity, thus rusulting in high accuracy of torque 
detection. Further, by working the surface of the rotary 
shaft for the purpose of forming the fine dents thereon, 
microdefects present on the surface layer of the rotary 
shaft are reduced or eliminated and thus reduced hysteresis 
and improved sensitivity can be attained in the process of 
torque detection.
Patent EP-0360365-A3 (EP)
Title: Magnetic-tape apparatus
IPC: G11B15/61
Filed: 1987-02-18
Abstract: A magnetic-tape apparatus comprises a scanning unit (1) 
which comprises at least one magnetic head (6) mounted on a rotatable 
head support (5). The scanning unit (1) further comprises a drum-shaped 
guide means comprising an upper drumpart and a lower drumpart (4, 3) 
which occupy a fixed position on the frame and between which the head 
support (5) is mounted for rotation, the circumferenctial surfaces of 
said drumparts forming a curved tapeguide surface (7) which is situated 
near the circular path (6a) of the magnetic head (6) and over which the 
magnetic tape (8) is guided. Near a first area (35) of the tape-guide 
surface (7) in which during operation the magnetic head (6) first 
contacts the magnetic tape (8) and near a second area (36) of the 
tape-guide surface (7) in which during operation the magnetic head (6) 
gets out of contact with the magnetic tape (8) the tape-guide surface 
(7) extends radially beyond the circular path (6a) described by the 
free end of the magnetic head (6).
Patent EP-0325445-A3 (EP)
Title: Printing machines
IPC: B41F13/34
Filed: 1989-01-19
Abstract: In the operative position shown in Figure 4 a 
printing roller 138 abuts the cylindrical surface of an 
impression roller 10 to cause ink to be transferred from 
an anilox roller 144 via the printing roller 138 to the 
impression roller 10. The gear wheel 134 on the 
impression roller 10 meshes with a gear 140 on the 
printing roller which in turn meshes with a gear 142 on 
the anilox roller to cause rotation of those three 
rollers.  
     The printing roller and the anilox roller can be 
moved to the right, when viewed in Figure 4, to move 
their co-operating cylindrical surfaces out of contact 
with each other, and yet still leave their gears in mesh 
in order to enable the printing roller to be changed and 
yet maintain the rotation of the anilox roller 144. A 
clutch is provided to enable the printing roller to be 
stationary when being changed, or to enable the printing 
roller to be correctly aligned with the impression roller 
when brought back into co-operation therewith.
Patent EP-0343903-A3 (EP)
Title: Liquid crystal devices
IPC: G02F1/1339
Filed: 1989-05-22
Abstract: A liquid crystal device comprises a layer of 
fibres or filaments (15) permeated with liquid crystal 
material, the layer (15) being located between 
electrodes (13, 14) by means of which an electric field 
can be applied across the layer to vary the 
transmissivity of the liquid crystal/fibre composite. 
The diameters of the fibres/filaments are selected so 
that the light transmissivity of the composite has 
reduced sensitivity with respect to mismatch of the 
refractive indices of the liquid crystal and the 
fibres/filaments.
Patent EP-0348101-A3 (EP)
IPC: F16K1/22
Filed: 1989-06-15
Abstract: A rotatable valve closure element (14) carries 
an elastomeric annular seal (32) with respect to a metallic valve 
body. An adjustable nut (54) is threaded to the valve body and 
includes a recess (60) for receiving a lower stem (62) of the valve 
closure member. One or more interference members (70) are spaced 
radially between the nut and the lower stem, and permit 
axial movement of the lower stem and thus the annular seals 
with respect to the valve body, while enabling the valve 
closure member to freely rotate during normal use of the 
valve. According to the method of the present invention, 
the lower stem is positioned within the recess of the nut, 
interference members are then fitted therebetween, the 
subassembly is then connected to the valve body and the 
shaft end interconnected with the valve closure member, and 
the closure member and seal are then centered with respect 
to the valve body by rotating the nut, which is then locked 
in position with respect to the valve body when the desired 
axial position has been achieved.
Patent EP-0352943-A3 (EP)
Title: Method for producing a sheet member containing at least one enclosed channel
IPC: B29C37/00
Filed: 1989-07-14
Abstract: A method is disclosed for producing an article 
having body (12) with one or more enclosed channels (26) 
extending therethrough such as for the circulation of 
fluids. The body (12) is formed about one or more fibers 
(10) to generate the enclosed channels (26) with at 
least one end of the fibers (10) extending beyond the 
body (12). The fibers (10) are then extracted from the 
channels (26) in the body (12) to open the channels 
(26).
Patent EP-0370630-A3 (EP)
Title: Switched-capacitor analog-to-digital converter with autocalibration
IPC: H03M1/10
Filed: 1989-10-25
Abstract: The present invention provides a switched capacitor 
analog-to-digital converter (6) for the sampling of an 
analog input signal and conversion to an equivalent 
digital format utilizing a multi-slope conversion 
technique. The elements comprising the converter are, 
preferably, integrated onto a single chip using CMOS 
technology. The converter (6) includes a processor (14) 
for coordinating switching in the converter and 
generating the digital output signal. A sampling 
circuit (15) having a switched capacitor (16) controlled 
by the processor (14) is included in the converter for 
sampling the voltage of the analog input signal and 
transferring charge representative of the analog input 
signal between an integrator (20) and the sampling 
circuit (15). Further included in the converter is a 
discharge circuit (36) for either transferring charge to 
the integrator (20) or receiving charge from the 
integrator (20). The discharge circuit (36) is 
comprised of a number of switched capacitors (38a-38f) 
having capacitances that are powers of two relative to 
one another to provide binary-weighted transfers between 
the discharge circuit (36) and the integrator (20). 
Further, the processor (14) can control, by using the 
switches (24, 40a-40f), the direction of charge transfer 
using a single reference voltage (V R ). Further, the 
converter (6) provides an autocalibration feature which 
compensates for deviation in the binary ratio of 
capacitances of the switched capacitors (38a-38f) 
employed in the discharge circuit (36).
Patent EP-0440928-A3 (EP)
Title: Process for manufacturing a printed circuit board comprising rigid and flexible parts
IPC: H05K1/02
Filed: 1990-12-12
Abstract: The essence of a process for manufacturing a printed circuit board comprising rigid and flexible parts by pressing rigid and flexible individual layers and removing the rigid outside layer in the parts required to be flexible by means of preformed predetermined breaking points is that, after the predetermined breaking points have been formed on the rigid individual layer clad with a copper layer inside the part intended to be flexible, a release agent which prevents the adhesion of the adhesive used and is temperature-resistant up to 200 DEG C is applied to the side remote from the copper layer, an insulating film coated with adhesive is then stuck to the rigid individual layer only in the part intended to be flexible, the insulating film projecting 3 to 5 mm beyond the dimensions of the flexible part on all sides, a continuous copper foil is then stuck over the insulating film including the rigid parts of the individual layer using an adhesive layer, said layer projecting at least 1  mu m in height above the insulating film over its entire surface, the composite is then pressed under pressure and heat to form a laminate, the adhesive bonds are allowed to cure and after production of the conductor pattern and machining of the contours, the individual layer with the copper coating is finally removed along the predetermined breaking points in the flexible part.
Patent EP-0380243-A3 (EP)
Title: Distributed bragg reflector laser for frequency modulated communication systems
IPC: H04B10/06
Filed: 1990-01-18
Abstract: To overcome the deleterious effects of the nonuniform frequency 
modulation response in semiconductor lasers due to current injection in direct 
frequency modulation applications, it has been determined that the linewidth 
enhancement factor α be made as large as possible. In one embodiment, distributed 
Bragg reflector lasers well suited for frequency modulation lightwave 
communication systems are designed to have an integrated feedback element such as 
a corrugation grating whose effective pitch is selected to cause the Bragg wavelength 
and, therefore, the laser operating wavelength to be longer than the wavelength at 
substantially the maximum gain or gain peak in the semiconductor structure. That 
is, the wavelength of the grating is effectively detuned toward the longer wavelength 
and lower energy side of the peak of the gain profile. Such detuning increases the 
linewidth enhancement factor in such a way that the nonuniform frequency 
modulation response and its effects are minimized and, in some cases, substantially 
eliminated.
Patent EP-0383516-A3 (EP)
IPC: H05B6/74
Filed: 1990-02-12
Abstract: A system comprises a shallow container (11a-­
11d) and a load (10) located therein for heating by 
microwave energy. The system is designed either to 
be used with, or itself to incorporate, a structure 
for generating or enhancing at least one mode of the 
microwave energy of an order higher than a fundamental 
mode, the latter being determined by boundary 
conditions resulting from the lateral dimensions of 
either the container or the load or both. The 
invention resides in controlling the depth (d) of the 
load in the container in such a manner that, upon 
irradiation of the product with the microwave energy, 
the power absorbed by the load from a higher order 
mode is at or near a maximum value, while preferably 
the power absorbed by the load from the fundamental 
mode is at or near a minimum value. Since uneven 
heating would ordinarily be associated with the 
predominance of a fundamental mode, the result of this 
invention is to increase the intensity of a higher 
order mode relative to the fundamental mode intensity, 
and thus provide improved uniformity of microwave 
heating.
Patent EP-0388114-A3 (EP)
IPC: B01J27/10
Filed: 1990-03-12
Abstract: A process is provided for the low temperature preparation of CF₃CHFOCHF₂ 
which comprises reacting CF₃CHClOCHF₂ with hydrogen fluoride in the 
presence of an antimony pentachloride catalyst or mixture of antimony 
pentachloride and antimony trichloride. The mole ratio of CF₃CHClOCHF₂ to 
HF is in the range of about 1.0:0.1 to about 1:7.
Patent EP-0390557-A3 (EP)
IPC: H01M50/562
Filed: 1990-03-29
Abstract: A laminar battery (26) has an anode layer, an 
ionically conductive electrolyte layer, and a cathode 
layer. The electrolyte layer is interposed between the 
anode layer and the cathode layer, and the layers are 
assembled to form an electrical cell. A pair of 
electrically conductive terminals are in electrical 
contact with the anode layer and the cathode layer. A 
protective sheet material (28) envelops the laminar battery 
and is heat sealed at the periphery of the laminar 
battery (26) and about the terminals (32,34) to exclude air and 
moisture. The terminals (32,34) extend from or are accessible 
through this protective sheet material (28) for connection to 
a device which is to be powered by the laminar battery (26).
Patent EP-0427379-A3 (EP)
Title: Method for producing titanium particles
IPC: F27D11/06
Filed: 1990-08-24
Abstract: Titanium is induction melted to produce a molten mass thereof and a water-cooled crucible (10) have a nonoxidizing atmosphere and a bottom opening (22). The current to the coil (30) used for induction melting is adjusted to produce a levitation effect on the molten mass (34) in the crucible (10) to prevent the molten mass (34) from flowing out of the bottom opening (22). The molten mass (34) is also maintained out-of-contact with the crucible (10) by providing a solidified layer (36) of titanium between the molten mass (34) and the crucible (10). After production of the molten mass (34) of titanium, the current to the induction coil (30) is reduced to reduce the levitation effect and allow the molten mass (34) to flow out of the bottom opening (22) of the crucible (10) as a free-falling stream (38) of molten titanium. The free-falling stream (38) from the crucible is directed to a tundish (48) from which the molten mass flows through a nozzle (54) for atomization. The spherical particles (42) produced by atomization are cooled to solidify them and are then collected. <IMAGE>