baber/WOPTO huggingface dataset:
Patent GB-507625-A (GB)
Abstract: 507,625. Optical-projection systems. BUSCH AKT.-GES. OPTISCHE INDUSTRIE, E. Dec. 14, 1937, Nos. 34629 and 34630. Convention dates, Dec. 14, 1936 and June 9, 1937. [Class 97 (i)] A system for the projection of a television image produced on the screen b of a cathoderay tube a consists of a lens-mirror d of large aperture which eliminates spherical aberration and approximately satisfies the sine condition, and a lens, or system of lenses c placed near the screen b and intended to reduce or eliminate marginal aberration. The lens of the lensmirror d may-be simple, as shown, or compound. The radius of the refracting surface of the lens-mirror is less than three-quarters of the focal length of this element, and this focal length is at least 1À5 times that of the complete system. The distance between the lens-mirror and the lens system is more than <1>/3 the focal length of the mirror. Where, as shown, the lens system consists of two convergent members, the distance between these members exceeds <1>/5 the focal length of the system, and one of the lenses is made of glass having a low V-value. In order to reduce chromatic aberration, one of the lenses consists of a cemented doublet. Data are given for the system shown having an aperture F /0.8.
Patent GB-1535507-A (GB)
Title: Light beam measurement
IPC: G01J1/42
Filed: 1975-11-24
Abstract: 1535507 Radiation beam measurements DEFENCE SECRETARY OF STATE FOR 24 Nov 1975 [25 Nov 1974] 51011/74 Heading G1A Radiation beam measurement apparatus comprises: means 1 for splitting the beam into first and second beams; a pair of movable plates 2a, 2b arranged in the first beam path to define a slit 5 of variable width; and means including first and second detectors 3, 4 for finding the ratio of the power of the portion of the first beam transmitted by the slit to the power of the second beam. A slit 5, Fig. 3, defined between micrometeradjustable plates 2a, 2b is first made narrow, and is moved across the path of a first portion of a laser beam S transmitted by a beam-splitter 1, until the position of maximum brightness is found. Thereafter the plates are separated symmetrically to vary the slit defined between their parallel edges, until a ratiometer R, comparing signals from photodetectors 3, 4, indicates that the power transmitted by the slit is 68À26% of the total power in the incident first portion of the beam. (A reference reading of the total power has previously been taken with the plates separated to be clear of the first portion of the beam.) The width of the slit which transmits 68À26% of the power is then taken as the value of the effective radius <SP>w</SP>(Z) of the beam in the plane of the slit. By the addition of a lens 6 Fig. 4 positioned in the main beam and separated from the slit 5 by its own focal length, a new reading of w is taken, from which the divergence # of the beam, Fig. 1 and hence the waist radius <SP>w</SP>O and the distance Z of the waist from the measurement plane, may be calculated.
Patent GB-1524059-A (GB)
Title: Electronic timepiece
IPC: G04G3/02
Filed: 1975-12-16
Abstract: 1524059 Electronic timepieces CASIO COMPUTER CO Ltd 16 Dec 1975 [17 Dec 1974] 51664/75 Heading G3T Errors in time indication due to inherent inaccuracy of a quartz crystal oscillator in an electronic timepiece, are automatically and periodically corrected by a correction circuit 38, Figs. 2 and 4, at predetermined instants in time detected by an AND gate detector 40, e.g. at 12 hour or 24 hour intervals. In the Fig. 2 embodiment, if the known error over a 12 hour period is say 1À25 secs., in advance and correction is to be made each time an indicated time of 5 hrs 5 secs is detected by detector 40, memory circuits 41-43 are pre-set with counts 5, 7, 3 respectively corresponding to 3À75 secs. Then when the time 5 hrs 5 secs is detected, counters 14, 15 and secs counter 16 are reset and the stored contents of the memories transferred thereto to correct their counts to 3À75 secs. Thereby 1À25 sec delay is effected and the error is eliminated. Similarly if the timepiece is 1À25 secs slow, then memories 41 to 43 are pre-set at 5, 2 and 6 respectively, and the time 5 hr 5 sec indicated by the counter circuits is corrected to 5 hr 6À25 secs. In an alternative embodiment the correction circuit 38, Fig. 4, includes a counter 51 which stores the correction value, e.g. 3 secs. At the set instant the detector 40 command signal causes the count 3 to be transmitted to a down counter 50. Assuming the indication is 3 secs in advance, over 12 hours, then a switch 53 is closed to cause a binary counter 54 to open an AND gate 56 and pass a 1 Hz signal from counter 15, Fig. 2, via OR gates 57, 58 to cause counter 50 to count down. Thereupon the counter 50 produces a "1" output which after inversion at 59 blocks AND gate 60 and thus prevents the passage of the 1 Hz signal from counter 15 to the unit seconds counter 16. This continues until counter 50 is empty when its output unblocks AND gate 60 and normal operation resumes, a delay of 3 secs having been effected. Assuming that the indication is 3 secs slow over 12 hours, switch 53 is operated so that binary counter 54 gives a "0" output which is inverted at 55 and together with a "1" output from counter 50 opens an AND gate 63 to pass a 10 Hz signal from counter 14 to counter 16 until down counter 50 is empty. Thereby the unit seconds counter 16 is advanced and the correct time is indicated.
Patent GB-1512462-A (GB)
Title: Polymeric material containing reactive epoxide groups and the method of its preparation
IPC: C08G59/00
Filed: 1975-12-19
Abstract: 1512462 Polymer containing epoxy groups CESKOSLOVENSKA AKADEMIE VED 19 Dec 1975 [29 Dec 1974] 52051/75 Heading C3P A polymer in the form of spherical particles having a diameter up to 3 mm. and containing 15% by weight of oxirane oxygen is obtained by aqueous suspension copolymerization, in the presence of an alcohol and a suspension stabilizer, of a monomer of Formula I where R1, R2 and R3 are independently H or CH3- and X is a vinyl or vinylidene containing group linked by C or O to the monomer, with a cross-linking agent selected from divinyl benzene and monomers of the formula where R4 is H, CH3, C2H5 or halogen, R5 is C1-C10 alkylene, phenylene or hydroxyalkylene and R6 is vinyl or allyl. In the examples glycidyl(meth)acrylate or glycidyl allylether is copolymerized with ethylene (or butylene) glycol dimethacrylate alone or together with methyl methacrylate in aqueous suspension in the presence of dodecanol, cyclohexanol polyvinyl pyrrolidone and azobisisobutyronitrile.
Patent GB-1237757-A (GB)
Title: Protection device for hoisting motors
Inventor: SINNER BENGT
IPC: B66C15/00
Filed: 1968-11-05
Abstract: 1,237,757. Protection and control of motors. ALLMANNA SVENSKA ELEKTRISKA A.B. 5 Nov., 1968 [6 Nov., 1967], No. 52368/68. Headings H2J and H2K. A protective arrangement for a hoisting motor is responsive to the disappearance of the driving torque of the motor. In this arrangement, a signal proportional to the actual value of the motor speed, e.g. a signal from a tachometer generator 12, and a signal proportional to the desired speed, e.g. a signal from a starter or potentiometer 11, are compared at 13 to produce a difference signal. This difference signal is compared at 15 with a signal dependent on the motor current, motor voltage or motor torque to form a second difference signal effective to cause the interruption of the supply to the motor 21. The arrangement may include an amplifier 14, a level detector 17, a time delay device 18, a transistor switching circuit 19 and a relay 20. A bias voltage may be applied to the device 15 from a potentiometer 16.
Patent GB-1246105-A (GB)
Title: Improvements in or relating to pistons for internal combustion engines
IPC: F16J9/00
Filed: 1968-11-08
Abstract: 1,246,105. Pistons. BAYERISCHE MOTOREN WERKE A.G. 8 Nov., 1968 [10 Nov., 1967], No. 52994/68. Heading F2T. To suppress or minimize piston ring flutter in a piston 2 having at least two piston rings 5, 6 housed in grooves 3, 3<SP>1</SP>, at least part of each of the two contact edges 11, 11<SP>1</SP> between the piston and the second piston ring 6 from the crown and any following rings are inwardly offset towards the piston axis 12 compared with the corresponding contact edges 10 between the piston and the top or first piston ring 5 by bevelled or recessed portions on one or both edges of the groove and/or on one or both outer edges of the ring. In the embodiment shown in Fig. 1, the ring 6 has an annular recess 6<SP>1</SP> and the upper edge of the groove 3<SP>1</SP> is bevelled at 2<SP>1</SP> whereby the area of the leakage passage 7, 8 through the ring 6 is about ten times that, 7, through the ring 5. An oil control ring 34 is fitted in a groove 3<SP>11</SP>. In a modification (Fig. 3, not shown), the outer edges (15) of the ring are bevelled only in the locality of the gap (9).
Patent GB-1121085-A (GB)
Title: Improvements in or relating to electromagnetic pulse counters
Inventor: DARR CHRISTIAN
IPC: G06M1/274
Filed: 1966-11-26
Abstract: 1,121,085. Counters. SIEMENS A.G. 26 Nov., 1966, No. 53039/66. Heading G4D. [Also in Division H]] A counter wheel 6, advanced by pulses applied to an electromagnet 1, is drivingly connected to a permanent magnet 7 which influences a semiconductor 8 at each digital position. The semi-conductor is a two-terminal device made of indium antimonide with metallic inclusions, the ohmic resistance of which increases in the presence of a magnetic field.
Patent GB-1440928-A (GB)
Title: Device for use in folding a sheet of packaging material
IPC: B65B11/36
Filed: 1972-11-17
Abstract: 1440928 Wrapping device A SCHMEREND 25 Oct 1973 [17 Nov 1972] 53141/72 Heading B8C A folding device includes a guide member 204 which is fixed to a rotatable shaft 55/56, two pairs of mutually perpendicular rods 202 which are slidably mounted on the guide member 204 for rotation therewith, folder members 70 mounted on holders 201, 203 which connect the ends of the rods 202, a stationary continuous cam track, and a cam follower roller 205 mounted on one holder 203 of each pair of rods 202, the cam track being arranged so that during indexing of the guide member 204 between stations a, b, c, d, the folding members 70 are moved between operative extended positions at stations a and b and inoperative retracted positions at stations c and d. The folding members 70 are detachably connected to the holders 201, 203. Cells 21/22 are associated with the folding members 70 and are mounted on the shaft 55/56 for rotation therewith. In operation a web 63/64 is pressed into the cell 21/22 at station a by a plunger and a central portion of the U- folded web is folded by the extended folding member 70. The web is held in the cell by vacuum. The cell and folding member are then indexed to position b whereat a cigarette block is inserted into the cell. The remaining folds are carried out during indexing from station b to station c and at station c. The wrapped cigarette block is removed from the cell at station d. The arrangement for folding the web between stations b and c and at station c may be as described in Specification 1,440,923.
Patent GB-1305580-A (GB)
IPC: B29D5/00
Filed: 1970-11-09
Abstract: 1305580 Attaching reinforcements to slide fastener chain YOSHIDA KOGYO KK 9 Nov 1970 [12 Nov 1969 (3)] 53173/70 Heading E2S In a method for attaching reinforcements R, Fig. 2, to tapes 10 of a slide fastener chain having alternate element-containing and element-free sections, the reinforcements are held in a plane perpendicular to that of the tape and are moved against it so that they fold themselves around its edge. A holding means 24 comprises jaws 26, 27, each pivotally connected at 28 to side plate 29, and having a slit 35 for holding the strip R. Starting from the position shown in Fig. 2, an element-free section, S, Fig. 6 is held taut by means (16, 17 not shown) in channel 41 between the jaws 26, 27. The holding means moves in direction Y, Fig. 5a, towards a cam 42 having progressively higher lands 43, 44, 45. As the means advances the second of these lands 44 pushes aside opposed fingers 38, 39, pivoted against springs 40 at 37' and 38'; the jaws remaining closed until the strip R folds around the stationary tape 10 and both are forced through the jaw lips 30, 31, Fig. 5b. Shaped die members 46, 47 further clamp the reinforcement in position Fig. 5c. The third land 45 pushes open the jaws by engaging the rolls 33, 34 in the jaws against the spring 32 connecting them; and they remain open since the fingers 38, 39 are then free to spring back and prop the jaws against the second land 44. The tape then moves on until the next element-free section S, is aligned with the holding means and after it has been held taut, the holding device begins to move in direction Z. The fingers 38, 39 slide along the second land, holding the jaws open as the tape passes back through them, and finally drop to the first land 43, closing the jaws as the tape takes up the initial position. The strips R are delivered from bobbins B and are sheared by cutters C to the desired length above slit 35. Arms 51 reciprocate on guide pillar 50, to deliver the strip, between upper cams 66, when the strip is held between grip 55 and plunger 54; and lower cams 62, when the strip is released.
Patent GB-1341470-A (GB)
Title: Electrophotographic light-sensitive materials
IPC: C07D221/02
Filed: 1972-11-22
Abstract: 1341470 Electro-photographic element RICOH KK 22 Nov 1972 [27 Dec 1971] 53980/72 Headings G2C C17C1 C17C3 and C17C5 An electro-photographic element comprises a conductive support and a photo-conductive layer thereon, the layer comprising a photo-conductive compound and a compound of formula  wherein R is a methyl, carboxy or nitro group and n is an integer from 1 to 3. A number of specific α-azo-9-fluorenones are used in the embodiments together with polyvinyl carbazole optionally brominated or chlorinated, polyvinylphenanthrene, polyvinylpyrene or polyvinyl dibenzothiophene. Polychlorobisphenyl may be added to the photo-conductive layer also. Other polymeric photo-conductors and also non- polymeric photo-conductors are specified. The support may be aluminium foil or a polyester sheet coated with aluminium.
Patent GB-1122069-A (GB)
Title: Improvements in and relating to silica and products based thereon
Inventor: GENTLES ROBERT PAUL
IPC: B01J21/16
Filed: 1965-12-21
Abstract: Olefins are polymerized using catalysts which comprise a transition metal compound such as CrO3 supported on novel silicas obtained by contacting particulate silica with an aqueous solution of "silicic acid" (including both true solutions and colloidal sols) in a quantity sufficient to increase the weight of the particulate silica by 1-25% after drying.  The catalyst may be deposited on the silica before, during, or after this treatment optionally with other additives such as ammonium silicofluoride, and may be activated by fluidization in a molecular-oxygen-containing gas.  The examples describe solution polymerization of ethylene in cyclohexane at 125-130 DEG  C., and particle form polymerization in pentane at 100 DEG  C.ALSO:The fluidizing properties of particulate silica are improved by contacting it with aqueous "silicic acid solution" and then drying it by heating, the quantity of "silicic acid solution" used being sufficient to increase the weight of the particulate silica by 1-25% after drying. The term "silicic acid solutions" includes both colloidal sols and true solutions such as that obtained by passing sodium silicate solution through a cation exchange resin in the hydrogen form.  The silicic acid is preferably free from metal cations.  Silica to be treated suitably has a particle size of 1-100 microns.
Patent GB-1376336-A (GB)
Title: Transistors
IPC: H01L29/00
Filed: 1971-11-23
Abstract: 1376336 Transistors SIEMENS AG 23 Nov 1971 [25 Nov 1970] 54255/71 Heading H1K In a transistor having one or more auxiliary emitter regions located on the side of its collector region remote from the base the collector region consists of a high resistivity zone adjacent the base and one or more lower resistivity regions remote from it. In operation the numbers of holes and electrons in the collector space charge region are approximately balanced to enable high current operation without deterioration in the high frequency performance. Such a balance may be achieved automatically by locating a zone containing a high density of recombination centres in a part of the base and/or collector region overlapping the edge of the space charge region. The resistance of the collector region is so selected that the change in voltage drop therein caused by the increase in collector current triggered by a rise in the voltage applied to the auxiliary emitter is less than that rise. The device may be operated with the input signal applied to the auxiliary emitter and output deprived at the emitter proper.
Patent GB-1195376-A (GB)
Title: Improved Count-Recorder
Inventor: BLADES ALFRED NIGEL
IPC: G06M11/00
Filed: 1966-12-06
Abstract: 1,195,376. Counters. A. N. BLADES. 5 March, 1968 [6 Dec., 1966], No. 54480/66. Heading G4D. [Also in Divisions G2 and H1] A fine focusing control knob 1 of a microscope includes a multi-pole electric switch, whereby movement of the central flexible part 6 of the switch in a selected radial direction steps a corresponding counter 15-20 and a total counter 21. The flexible contact 6 is guided by insulated member 12 towards the appropriate outer contacts 10. Alternatively the contact 6 may act as a bridge between outer contacts in two rings. The device is used to register objects according to type or size in each plane as it is brought into the field of view.
Patent GB-1132840-A (GB)
Title: Improvement in spark ignition internal combustion engines
Inventor: BAUDRY JEAN
IPC: F01L3/06
Filed: 1965-12-23
Abstract: 1,132,840. Admission passages; combustion chambers. INSTITUT FRANCAIS DU PETROLE DES CARBURANTS ET LUBRIFIANTS. Dec.23, 1965 [Dec.23, 1964], No.54665/65. Heading F1B. When the inlet valve 1 of an I.C. engine opens, apertures 8 and 10 in the valve stem and guide come into register, and rich mixture is thus conveyed from a passage 9 to a passage 2 in the valve stem and directed by a passage 3 in the valve head towards an aperture 12, by which aperture the main combustion chamber communicates with a small antechamber, which is bounded by a wall 13 and in which the sparking plug electrodes 4 are located. The antechamber is not provided with any separate fuel/air mixture admission means and has a volume not greater than one tenth of the total volume of the combustion chamber at t.d.c. Weak mixture or air is supplied by inlet passage 11. A member 7 co-operates with a flat 6 on the valve stem to prevent the valve from turning, The passage 3 may be obliquely inclined to the passage 2 and its downstream cross-section may be elongated and narrow, Figs. 2 and 2a (not shown). More than one aperture 12 may be provided. The chamber wall 13 may be part of a special sparking plug. Alternatively, the antechamber may be formed by a shaped cavity in the cylinder head, The antechamber may be conical.
Patent GB-1438041-A (GB)
Title: Biological process for treatment of polluted water
Inventor: DELIN P S
IPC: C02F1/52
Filed: 1973-11-26
Abstract: 1438041 Anaerobic purification of water P S DELIN 26 Nov 1973 [27 Nov 1972 12 Jan 1973] 54700/73 Heading C1C A process for purifying polluted water containing nutrient salts, heavy metals and/or poisonous materials as contaminants comprises: (a) producing an anaerobic zone and forming hydrogen sulphide in the water by stimulating the growth of the algae and/or microorganisms resident in the water, (b) continuing the growth for a time sufficient to cause the contaminants to form a separate phase in the water by precipitation as sulphides or by absorption and/or assimilation of the algae and/or microorganisms with subsequent deposition with the algae and/or microorganisms and (c) eventually separating the contaminant phase from the water phase. The contaminants must be present in the anaerobic zone for at least 0À3 days, and preferably more than 3 days.
Patent GB-1375109-A (GB)
Inventor: ENGELSMANN D
IPC: G03B7/04
Filed: 1972-11-29
Abstract: 1375109 Indicating exposure values AGFA-GEVAERT AG 29 Nov 1972 [29 Nov 1971 (2)] 55157/72 Heading G2A Means for indicating the value of an exposure characteristic in a camera e.g. shutter time, comprises several indicating elements e.g. lamps, each being connected to a corresponding switching element; the switching elements are connected to a photo-sensitive element so that as the light reaching the photo-sensitive element increases the switching elements are fired in sequence, bridging circuits being provided so that only that lamp connected to the switching element which was fired last i.e. whose input voltage is nearest the threshold voltage, is actuated to indicate the correct exposure value for the prevailing light conditions. In Fig. 1 the indicating elements are luminous diodes 2, 3, 4 and 5, visible in a view-finder 1, each of which indicates a different shutter speed. Each diode is connected to the output of a switching element or trigger stage 6, 7, 8 and 9 respectively, all the trigger stages having the same threshold value. The inputs to the trigger stages are taken from tappings between resistors 20 to 24, the resistor chain being in series with a photo-sensitive element 25. The element receives light through a neutral density wedge 26, or alternatively through a variable aperture diaphragm which is coupled to a diaphragm aperture setting member 27. As the light received increases the resistance of element 25 falls until the input voltage to trigger stage 6 falls below the threshold value so that the stage conducts and lights up diode 2. As the incident light increases further stage 7 fires lighting up diode 3 and bridging diode 2 by the diode 14. Similarly when stage 8 and 9 trigger diodes 2 and 3, and 2, 3 and 4 are bridged and diodes 4 and 5 are lit respectively. In alternative embodiments the indicating elements comprise glow discharge tubes or liquid crystals which are normally transparent but become opaque when a potential is applied across them. Also the circuit may comprise trigger stages with varying threshold values at stages which are conducting and non- conducting below and above the threshold value respectively, these preferably being used in conjunction with liquid crystals.
Patent GB-1144918-A (GB)
Title: Improvements in or relating to trawling gear
Inventor: ASHWORTH JOHN ARTHUR
IPC: A01K75/06
Filed: 1966-12-09
Abstract: 1,144,918. Moulding bobbins. EDWIN ASHWORTH PLASTICS Ltd. 22 Nov., 1967 [9 Dec., 1966], No. 55178/66. Heading B5A. [Also in Division A1] A process for the manufacture of bobbins for deep sea trawling gear comprises sealing a suitably shaped mould with a core located therein with plastics paste, filling the mould with a mixture of thermoplastic material granules (e.g. P.V.C. or P.V.A.) and plastics paste (e.g. P.V.C. paste), closing the mould, heating the mould to set and cure the mixture, opening the mould and removing the bobbin.
Patent GB-1301969-A (GB)
IPC: C07C/
Filed: 1971-12-02
Abstract: 1301969 3-Endo-aminoborneol F HOFFMANN-LA ROCHE & CO AG 2 Dec 1971 [4 Dec 1970] 56022/71 Heading C2C 3-Endo-aminoborneol is prepared by reducing 3-endo-aminocamphor or a salt thereof with dichloro- or dibromoaluminium hydride (which may be prepared in situ).