baber/WOPTO huggingface dataset:
Patent GB-865889-A (GB)
Title: Improvements relating to apparatus and methods for mounting anatomical and like specimens
IPC: G01N1/36
Filed: 1959-09-01
Abstract: 865,889. Preparing microscope specimens. McCORMICK, J. B. Sept. 1, 1959, No. 29808/59. Class 97(1) Before sectioning a specimen by means of a microtome the specimen is embedded in a body of paraffin or other wax by placing the specimen on the bottom of an open top base mould, placing on top of the mould an open mould which provides an opening through which molten wax is poured to a level within the open mould sufficient for embedding the specimen in the mould and for uniting the wax to the open mould when the wax hardens, and removing the base mould from the hardened wax body. The open mould has side walls of irregular shape so that when the wax hardens it will be united to and cannot be removed from the open mould without breaking either. Apparatus for carrying out this method comprises a base mould 10 having a bottom 12 for supporting a specimen and slightly tapered side walls 13, and an open mould 11 shaped to sit on the lower mould 10 and providing an opening through which the molten wax may be poured and having an internal collar 17 whereby the hardened wax will be retained in the mould. The open mould 11 has depending lugs 15 which locate it relatively to the lower mould and has laterally extending flanges 16 with nipples 151 for locating the mould 11 when it is used with lower moulds 10 of different sizes. Preferably, the lower mould 10 is formed of aluminium or other material having a higher thermal conductivity than the open mould 11 which may be formed of high impact styrene so that on cooling of the wax the shrinkage extends downwardly and an impression is produced with the specimen in a flat surface at the face of the moulded wax body. When the wax has hardened, the mould 10 is removed so that the assembly consisting of the mould 11 and the wax body carried thereby can be mounted in the jaws of a microtome for sectioning.
Patent GB-709715-A (GB)
Title: Improvements relating to non-linear electrical circuits
Inventor: STILLWELL PETER FREDERIC THOMA
IPC: H04N5/202
Filed: 1950-12-06
Abstract: 709,715. Non-linear circuits. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Nov. 15, 1951 [Dec. 6, 1950], No. 29822/50. Addition to 702,359. Class 40 (6) In a circuit for varying the contrast as described in the parent Specification in which the gain is caused to increase with decrease in input to a predetermined level a rectifier is arranged to change its impedance so that the gain falls for inputs below this level. A television signal, Fig. 1, D.C. restored by device 3 is applied in a positive-going sense to valve 1, negative-going output appearing at the anode. For large inputs the valve 5 is conducting to shunt the load resistor 4 but as the input falls the cathode potential rises to decrease the conduction of valve 5 and hence increase the effective anode load and gain of valve 1. The gain increases with falling input until diode 9 conducts to lower the effective load and gain of valve 1. The cathode potential of diode 9 is set by adjustment of the bias potentiometer 12 controlling the grid potential of valve 10: In a modification, Fig. 4 (not shown), the input is arranged to be in the opposite sense. In a further modification, Fig. 3, the cathode resistor 20 is returned to a negative potential and the cathode is normally held at earth potential by rectifier 19 conducting. When the input is sufficiently negative, rectifier 19 cuts off and the resistor 20 provides a large amount of negative feedback. In an alternative arrangement, Fig. 5, the input ;:s applied over an attenuator comprising resistor 26 and diode 27, diode 29 being held non-conducting due to positive bias applied over resistor 31. As the input signal decreases, the rise in impedance of diode 27 causes an increase in the output until diode 29 conducts to shunt the output. Specifications 449,242 and 692,543 also are referred to.
Patent GB-759481-A (GB)
Title: Electro-optical apparatus for producing magnified images
IPC: H04N7/18
Filed: 1952-11-25
Abstract: 759,481. Local-viewing. STRICHT, N. R. D. VAN DER, and BOSCH, F. J. G. VAN DEN. Nov. 25, 1952 [Nov. 27, 1951], No. 29847/52. Class 40 (3). Apparatus for producing a magnified image of an object comprises means for illuminating the object from different directions with an intermittent beam of light to produce a sequence of " showings " each of which is analysed by means of an iconoscope and the signals from which, after amplification, are displayed on the screen of a picture reproducing tube as a sequence of enlarged images corresponding to the " showings ". In the embodiment shown in Fig. 1, the object 6 (which in this case is light transmissive) is illuminated from different directions by means of light produced by a " flying-spot " scanner tube 1 the beam of which is interrupted at a high rate and the different " showings " thus produced are imaged on the whole of the target of an iconoscope tube 11, the scanning rate of which is sufficiently high to analyse completely each " showing ". The signals generated by iconoscope 11 are thus supplied via an amplifier 13 to a picture-reproducing tube 14 the beam of which is stationary and on the screen of which a succession of light images instantaneously representative of the signals from iconoscope 11 is produced. These images occupy the whole area of the screen of tube 14 and to eliminate noise signals, which are manifest as an irregular edge on the images, a mark 18 provided with a central aperture 19 is arranged to blank off the marginal part of the screen. Light passed by the mark 18 is then imaged on a photo-electric cell 17 (incorporating an electron multiplier) and the signals generated thereby are supplied, via an amplifier 20, to a picture reproducing tube 26 the beam of which is scanned synchronously with that of iconoscope 11 and on the screen of which a succession of enlarged images corresponding to the " showings " is produced and projected on to a viewing screen 29. When the object to be magnified is not transparent light from the " flying-spot " scanning tube 1 may be arranged to be reflected on to the target of iconoscope 11 (Fig. 2, not shown).
Patent GB-1118162-A (GB)
Title: Improvements in and relating to timing devices
IPC: G07C1/02
Filed: 1964-07-27
Abstract: 1,118,162. Time-recorders. C. E. HAMMOND. 19 July, 1965 [27 July, 1964; 4 May, 1965], Nos. 29926/64 and 18774/65. Heading G4T. In a device for producing a visual record dependent on elapsed time, comprising a base 1 for a record card 3 and a printing head 5 containing a printing counter 8 and fixed-speed drive means for the counter, the head is mounted for movement between an inoperative position clear of the card and an operative position over the base, and the drive means is switched on only when the head is in the operative position. As shown, the card is located by peg 2, and the head which is hinged at 4 is normally located in the operative position shown in which it is supported on rubber pads 7. In this position, a feeler 21 is compressed by the card and thus closes a switch to energize motor 10 which drives the counter 8, and also drives visual totalling and single job counters 9 and 18, through a composite gear train mounted on a frame (17) (Fig. 4, not shown). Printing is effected by depressing the head against the resistance of the pads 7.
Patent GB-188653-A (GB)
Title: Improvements in wind motors
IPC: F03D3/04
Filed: 1922-11-02
Abstract: 188,653. Devin, K. I. Nov. 10, 1921. Current motors; regulating.-The speed of a wind motor comprising a vane-wheel 3 on aver. tical shaft 1 is regulated by a series of guide vanes 4, the inclination of which is adjusted by a small vane-wheel 9 operated by the wind. The wheel 9 actuates the vanes 4 through a disc 6 and rods 7, a spring 10 or a weight on a lever 8 tending to restore the vanes to normal position.
Patent GB-505090-A (GB)
Title: Improvements relating to means for extruding or drawing materials with a polygonal cross-section
IPC: B21C25/08
Filed: 1937-11-02
Abstract: 505,090. Extrusion dies. NORTHERN ALUMINIUM CO., Ltd., and PARRY, E. A. Nov. 2, 1937, No. 29959. [Class 87 (ii)] [Also in Group XXII] A die for the extruding or drawing of material with a polygonal cross-section comprises a body enclosing a plurality of plates 8 slidably arranged edge to edge, the two edges .9, 10 of each plate which abut on the adjoining plates, defining an acuteangle between them and one of said edges serving as one side of a polygonal area 12 of the desired shape, the plates being adjustable in a rotary sense about the axis of the die for moving the plates relatively to one another to vary the size of the die opening. In one form, Figs. 1 and 2, the plates are mounted within a body comprising a back 1, a ring 3 and a front cover 2 bolted together by - bolts 4. The ring 3 has six internal surfaces 5 through which project adjusting or guide screws 7 for the plates. Adjustment of the plates to vary the size of the die opening 12 is effected by means of screws 20. The plates may be clamped by means of bolts 14 passing through slots 15 and 16 in the back and front portions 1 and 2 and through slots 13 in the plates 8. In a modified form, Fig. 3, the cover portion 2 is angularly adjustable for effecting the movement of the plates. Pins 24 screwed into the cover 2 pass through slots 25 in the plates and into sliding collars which run in arc-shaped grooves in the back portion 1. The cover 2 is rotated by means of a hand wheel 33 and worm. 30. The working edges of the plates are provided with hard metal facings 22 secured by screws 23.
Patent GB-216450-A (GB)
Title: Improvements in or relating to the manufacture of hypochlorites
IPC: C01B11/06
Filed: 1923-11-28
Abstract: In the production of hypochlorites as described in Specification 195,366 in which an extract of hypochlorous acid in an organic solvent is employed, the hypochlorous acid reaction mixture is such as to contain 25-35 per cent of available chlorine, the mixture is submitted to a vacuum to remove free chlorine, and the extraction of the hypochlorous acid is effected with carbon tetrachloride containing 5 per cent of alcohol.ALSO:In the production of hypochlorites as described in Specification 195,366 in which an extract of hypochlorous acid in an organic solvent is employed, the hypochlorous acid reaction mixture is such as to contain 25-35 per cent of available chlorine, and is submitted to a vacuum to remove free chlorine before extracting with the solvent.  The solvent employed is carbontetrachloride containing 5 per cent of alcohol.ALSO:In the production of hypochlorites by the process described in Specification 195,366, in which an extract of hypochlorous acid in an organic solvent is treated with an alkaline substance such as soda or lime, the hypochlorous acid solution is employed in an excess which may be 30-40 per cent over the lime; the hypochlorous acid is extracted from the reaction mixture in which it is formed by means of carbon tetrachloride containing 5 per cent of alcohol; the hypochlorous acid reaction mixture is subjected to a vacuum to remove free chlorine and carbon dioxide before extracting the hypochlorous acid with the solvent; and the hypochlorous acid reaction mixture is such as to contain 25-35 grams per litre of available chlorine.  In the treatment of the hypochlorous acid extract with lime, about twice as much water is added as is necessary to produce the compound Ca(OCl)23H2O, and the product in the form of an apparently dry powder is then separated from the solvent liquor. The product is so rich in calcium hypochlorite that it is not necessary to extract with water and evaporate as described in Specification 195,366.
Patent GB-521638-A (GB)
Title: Improvements in or relating to the deflection of cathode-ray beams
Inventor: SCHLESINGER KURT
IPC: H01J29/46
Filed: 1938-10-17
Abstract: 521,638. Television ; cathode-ray tubes. RADIOAKT.-GES. D.S. LOEWE. Oct. 17, 1938, No. 29980. Convention date, Oct. 20, 1937. Addition to 423,427. [Classes 39 (i) and 40 (iii)] Relates to scanning systems of the kind desscribed in the parent Specification and Specifications 456,717 and 521,637 in which, in order to improve the marginal sharpness of the image, push-pull potentials are applied to the deflecting plates together with a fluctuating positive bias, which increases with the deflecting voltage and is impressed on the plates in parallel and also on the electron lens electrodes. According to the present invention, a common transformer 8 with two secondary windings 9, 9<SP>1</SP> is used for deriving from the saw-tooth deflecting voltage 1, the fluctuating bias which is applied to the electron lens 7 and, over resistance 6, to the deflecting plates 4, 4<SP>1</SP>. The primary of the transformer is shunted by a resistance 10, and the secondaries are connected to condensers 11, 11<SP>1</SP>, this arrangement producing a voltage which increases with the square of the deflecting voltage by integrating the saw-tooth voltage. The condensers 11, 111 are preferably unequal in size. The Specification as open to inspection under Sect. 91 also describes (1) a system with pushpull deflecting voltages in which a magnetic lens is used, the saw-tooth voltages being applied by a triode to the lens coil without integrating, Fig. 3 (not shown) ; (2) a system in which the rapid line deflection is effected electrically and the slow field deflection magnetically. The magnetic iron deflecting plates are made in two parts insulated from each other, the parts 4a, 4a<SP>1</SP>, Fig. 4 (Cancelled), being connected to the anode, and the parts 4b, 4b<SP>1</SP> to the deflecting potential. This subjectmatter does not appear in the Specification as accepted.
Patent GB-851978-A (GB)
Title: Improvements in or relating to processes for the production of electrodes on semi-conductor bodies
IPC: H01L21/60
Filed: 1958-09-19
Abstract: 851,978. Semi-conductor devices. SIEMENS & HALSKE A. G. Sept. 19, 1958 [Sept. 19, 1957; Aug. 6, 1958], No. 30072/58. Class 37 In the production of an electrode on a semi-conductor body, an auxiliary metal which when molten wets the surface of the semi-conductor body is first alloyed to the semi-conductor body, and aluminium or an aluminium alloy is thereafter alloyed to the auxiliary metal and semiconductor body. If the body is germanium, the auxiliary metal may be for example indium, tin or lead. Fig. 1 shows a germanium crystal 1 to which a blob of indium 3 has been alloyed along the intermediate surface 2. A plate of aluminium 4 is placed on the indium and covered with a graphite mould 5 containing a carbon rod 7 in a hole 6. The arrangement is heated until the indium dissolves the aluminium and is shaken so that the rod 7 rubs the aluminium into the indium. The graphite mould (Fig. 2 not shown) may be designed so as to hold the germanium crystal as well as the aluminium and the carbon rod. Two layers, one of aluminium, one of another metal may replace the simple aluminium layer.. The crystal may be etched or cleaned before the initial alloying of the indium. This initial alloying should be done in a neutral or reducing atmosphere. A detailed temperature sequence for the various stages, i.e. alloying the indium to the germanium, alloying the aluminium into the indium and allowing the aluminium to diffuse into the semi-conductor crystal is described in the Specification.
Patent GB-464142-A (GB)
Title: Improvements in or relating to holders for electric lamps
IPC: F21V19/00
Filed: 1935-10-31
Abstract: 464,142. Two-part couplings. GENERAL ELECTRIC CO., Ltd., CONCHIE, J. R., and QUANCE, F. G. Oct. 31, 1935, No. 30083. [Class 38 (i)] A holder for a tubular lamp 14 with lateral contacts 7 comprises a spring clip 6 reinforced by an external spring 8 and engaging recesses 10 in the contact 7. The lamp is locked in the clip by clamping screws 15, engaging the clip and operable from the exterior of the holder and made of insulating material. The clip need not carry current as a leaf spring 12 engaging the end of the contact 7 may be provided connected to a separate terminal. The clip is elongated to allow some longitudinal variation in position of the contact 7, limited by lugs 9. The body 2 of the holder has end flanges 4 with thin portions for breaking away to form cable inlets.
Patent GB-617949-A (GB)
Title: Improvements in and relating to collapsible furniture
IPC: A47C4/34
Filed: 1946-10-09
Abstract: 617,949. Collapsable furniture. HOUNSFIELD, L. H. Oct. 9, 1946, No. 30182. [Classes 52 (ii) and 52 (iii)] [Also in Group XXV] A collapsable chair has side frames 1 spaced by removable front and rear rails 5, 6 and secured together by means of the seating fabric 21, which is preferably laced around bars 3 connecting the front and rear uprights of the side frames. The uprights are connected by stays 4, 12 which, when the bars 3 and upper ends of the stays are disconnected, can pivot about their lower ends to enable the side frames to be collapsed and bundled. Preferably the uprights are tubular and plugs 24 inserted in their upper ends carry flexible arm-rests 25 and a removable back 29 or the arm-rests and back may be removed and a flexible table top or a canvas wash basin substituted. The plugs are slotted at their lower ends to engage a transverse pin 35, Fig. 8, which prevents rotation. The horizontal rails 3, 5 are spigoted in brackets 7, Figs. 11 and 12, and retained by cotters 13 which also serve to secure the top ends of the stays 4, 12. The cotters are retained by a spring 16 which enters a slot 20 near the end of the cotter. A tray 46 may be mounted on a bracket 45 carried by a front upright of the frame 1.
Patent GB-1445215-A (GB)
Title: Bottom folded bags
IPC: B31B160/20
Filed: 1974-07-08
Abstract: 1445215 Making bags; seaming and reinforcing edges of sheet material ROBERT BOSCH GmbH 8 July 1974 [9 July 1973] 30190/74 Headings B5D and B5K [Also in Division B8] A bag of a laminate of cellulose acetate or polyester film 17 and a polyethylene lining 16 having a W-shaped fold at its base has holes 24 adjacent the ends of the folds whereby the inner layer 16 flows around the periphery of the holes upon application of heat and pressure to fuse together the plies of the fold. The sheet material 31 is fed from a roll 30 and folded into a strip with the W-fold 13 and is then perforated by a punch 33. L- shaped welding jaws 34 form the side and bottom seams of each bag and shears 36 separate each bag.
Patent GB-445791-A (GB)
Title: Improvements in or relating to means for controlling vapour arc convertors
IPC: H02M1/04
Filed: 1934-10-22
Abstract: 445,791. Converting ; changing wave form. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and TAYLOUR, H. H., c/o General Electric Co., Ltd., Witton, Birmingham. Oct. 22, 1934, No. 30240. [Class 38 (ii)] An arrangement for supplying A.C. potential of peaky wave form to the control electrode 4 of a vapour arc converter 1 com. prises a choke 7 through which A.C. of flat-topped wave form is caused to flow by connecting in series therewith a saturable impedance, for example, a pair of reversely connected diodes 11, 12 operating at saturation. The choke-diode circuit is energized from the secondary 13 of a transformer the primary of which is connected to the A.C. circuit 6 associated with the converter 1. The peaky A.C. potential for the control circuit of the converter is derived from the terminals of the choke 7 or from a secondary winding associated therewith. The phase of the potential peaks may be adjusted by including in the choke-diode circuit a variable D.C. source such as the battery 9 and potentiometer 10.
Patent GB-720303-A (GB)
Title: Improvements relating to feed apparatus for step-by-step rolling mills
IPC: B21B21/04
Filed: 1951-12-27
Abstract: 720,303. Rolling-mandrel and like carriages and supports. WESTDEUTSCHE MANNESJMANNROHREN AKT.-GES. Dec. 27, 1951 [Jan. 11, 1951], No. 30251/51. Class 83 (4). A mandrel-feeding device for a step-by-step rolling-mill comprises a slide 2, Fig. 1, displaceable along the bed 1 of the mill and adapted to carry one of a pair of mandrel reciprocating-feed devices 3, 3<SP>1</SP> which are fed alternately into position from a pair of supporting platforms 6, 6<SP>1</SP> on opposite sides of the slide 2 and displaceable along the bed 1 to the required starting positions for given lengths of ingot. The devices 3, 31 carrying mandrel rods 5 are slidable on guides 19 on the platform 6, 6<SP>1</SP> and are pushed alternately onto the slide 2 by hydraulic rams 8, 8<SP>1</SP>. The platforms 6, 6<SP>1</SP> are movable along the bed 1 on guides 7, 71 and are located by setting devices 20. Pivoted latch member 10, Fig. 3, mounted on abutments 11, 11<SP>1</SP> integral with the platforms 6, 6<SP>1</SP> prevent the devices 3 from being inadvertently pushed from the platforms. The devices 3, 3<SP>1</SP> are locked to the slide 2 by a hydraulically actuated catch 15 on the slide 2 engaging in a slot 18 on the device 3. The catch is automatically released as the slide 2 retracts by a crossmember 14, on the slide engaging the abutments 11, 11<SP>1</SP> on the platforms 6, 61.
Patent GB-375673-A (GB)
Title: Process for the production of white opaque enamels and glazes, especially sheet-iron enamels
IPC: B04B1/20
Filed: 1931-11-02
Abstract: 375,673. Enamels and glazes. KREIDL, 1., 5, Sebastian Kohlgasse, Vienna. Nov. 2, 1931, No. 30332. Convention date, Dec. 10, 1930. [Class 56.] A process for the production of opaque white enamels and glazes, particularly sheetiron enamels, consists in using substances which opacify by the liberation of gas bubbles in association with enamel frits which assume a colloidal condition, or at least a finelydivided state approximating thereto, in the slip. The enamel frit can be brought into the colloidal state either mechanically, as by grinding in a colloid mill, or by modifying its chemical composition as described in Specification 375,670. Methylene blue is suitable for use as a gas-producing agent. Examples of suitable mixtures are given in the Specification.