baber/WOPTO huggingface dataset:
Patent GB-647579-A (GB)
Title: Improvements in radio navigational aid systems
IPC: G01S1/02
Filed: 1947-12-31
Abstract: 647,579. Radio navigation. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Dec. 31, 1947, No. 4678/50. Convention date, Sept. 30, 1938. Divided out of 647,549. [Class 40 (vii)] A radio navigation system comprises two pairs of spaced transmitters, each pair providing a hyperbolic phase pattern, the pairs of transmitters being separated by a distance large compared with the spacing of the members of each pair and the lines joining the members of each pair intersecting externally, the included angle being acute. The two pairs of transmitters 35, 36, and 37, 38, may be arranged as indicated to produce hyperbolic equi-phase patterns 39 and 40 respectively in order that a craft may determine its location in the area covered by the system by measuring the respective phase differences between the signals from each pair. Amplitude or frequency modulated carrier waves may be used to produce the equi-phase contour patterns. In one embodiment, all the stations radiate on different carrier frequencies isochronous modulation of the pairs by low-frequency oscillations being used to provide the phase patterns. Specification 647,549 is referred to.
Patent GB-1145597-A (GB)
Title: Electrophotographic and photographic copying machines
IPC: G03G15/00
Filed: 1967-01-31
Abstract: 1,145,597. Photographic and electro-photographic apparatus. KONISHIROKU PHOTO INDUSTRY CO. Ltd. Jan. 31, 1967 [Feb. 3, 1966], No. 4702/67. Headings G2A and G2H. A photographic or electro-photographic copying machine has a rotary drum 1 which carries a supply 13 and take-up roll 14 for sensitive paper within the drum. The roll 14 is driven intermittently to renew a length of paper on the outside of the drum 1. The roll 14 is driven by gears (27, 25, 30, 32 Fig. 3 not shown) under the control of an electromagnet 46 energized by a switch (49) by a cam (50). By replacement of cam 50 the length of paper fed may be varied. As applied to electro-photographic copying the paper has a photo-conductive coating charged by an electrode 3, exposed to an original 11 through a slit 41 and developed by a brush 4. The developed image produced is transferred by an electrode 5 to a web 7. In another embodiment, Fig. 4 (not shown) the image is not transferred.
Patent GB-1375053-A (GB)
IPC: H02M7/5375
Filed: 1972-02-01
Abstract: 1375053 Transistor invertor circuits PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 1 Feb 1972 [4 Feb 1971] 4711/72 Heading H3T The transistor 9 of an oscillator, Fig. 1, has a resistor 7 and a parallel capacitor 14 in a path between its base and emitter, and a lower capacitor 13 connects the base to a transformer 11. The primary 10 forms the collector load and the secondary 15 is tuned by C17 and drives a pressure mercury discharge lamp 16 together with its ballast and starting circuits. A pushbutton switch 6 starts the oscillation. An inductor may be included in the connection between terminal 1 and winding 10, to give sinusoidal voltages in the transformer windings, or else the leakage inductance of the transformer may form part of the necessary inductance. C14 is preferably ten times C13 and serves not only to protect the emitter base junction of T9 instead of a diode, but also ensures sinusoidal current flow in C13. The negative charge built up on C14 cuts off T9 for a large portion of each cycle, during which time the current in C13 (Fig. 4, not shown) flows into C14 (Fig. 2, not shown). When T9 conducts, its base current (Fig. 3, not shown) makes up the remaining portion of the C13 sinusoidal current.
Patent GB-1241621-A (GB)
Title: Wound healing composition
Inventor: BALASSA LESLIE LADISLAUS
IPC: A61K33/42
Filed: 1969-01-28
Abstract: 1,241,621. Wound-healing preparations. L. L. BALASSA. 28 Jan., 1969 [12 Feb., 1968], No. 4750/69. Heading A5B. Compositions for promoting wound-healing comprise finely divided particles (up to 200 microns) of the reaction product of egg shells with citric, or phosphoric acid. Optionally, the compositions may also comprise other therapeutically active substances, e.g. ascorbic acid, ascorbyl palmitate, zinc oxide, stearate or citrate, neomycin, chloramphenicol, tetracycline, sulphanilamide, lidocaine or procaine. They may be in the form of powders for topical application, e.g. deposited on a bandage or dressing.
Patent GB-275105-A (GB)
Title: Improvements in and relating to conveyers
IPC: B65G17/06
Filed: 1927-02-19
Abstract: 275,105. Brown, C. Feb. 19, 1927. Endless chain conveyers with platform carriers.-In conveyers of the kind comprising a pair of parallel endless chains, belts, &c. and a series of plates, trays, shelves, &c. pivoted at one end to each of the chains, &c. the plates &c. are maintained horizontal by means o: movable chains, belts, &c. The plates 1 are provided with trunnions 2, which are pivotec in the chains 3 and provided with arms 4 having recessed ends 5. Pins 6 on a chain &c. 7 engage with the recesses and keep the plates horizontal. In order that the plates may be permitted to tilt to discharge the articles carried, the pins 6 are slidably mounted in the chain 7 and provided with abutments 10 which at the discharge point engage with a cam plate 9 and disengage each pin from its recess. Each plate is returned to the horizontal position by engagement with a plate 11, an( the pins 6 are re-engaged by a cam. In a modification. the pins 6 are mounted in the arms, 4 and the recesses are provided in the chain 7.
Patent GB-905729-A (GB)
Title: Improved inspection device
IPC: G01N33/00
Filed: 1960-02-10
Abstract: 905,729. Photo-electric inspection apparatus. MEYER MANUFACTURING CO., GEO. J. Feb. 10, 1960 [April 22, 1959], No. 4776/60. Class 40 (3). A bottle inspection system comprises means for directing light from different areas of the bottle through a reticule on to a photo-cell. The light directing means may be a tube rotated about an axis making a small angle with its longi - tudinal, axis, Fig. 3 (not shown), or may be a prism 18 which is placed below a reticule 16 and is spun about the axis of the reticule. The area A is thus nutated to cover an area larger than that of area A. The total area covered represents the area of the bottle to be inspected, and the light received from any instantaneous area A passes through the reticule 16 to the photo-cell 14. The reticule is formed of translucent and opaque markings. If there are no dirt particles in the bottle the photo-cell output is D.C., but if particles are present the output includes an A.C. component. This is because the output when a particle is covered by an opaque portion of the reticule is greater than that when the particle is under a translucent portion, and the particle is covered and uncovered as the prism rotates. Preferably the reticule is rotated as well as the prism, and at a higher rate than the prism. The photo-cell output feeds to an amplifier 15 tuned to the frequency of the alternating component. The amplifier controls a mechanism 17 which rejects a dirty bottle. Specification 890,596 is referred to.
Patent GB-750643-A (GB)
Title: Improvements in or relating to electric discharge devices
Inventor: ULLRICH EDWARD HILL
IPC: H01J17/48
Filed: 1954-02-18
Abstract: 750,643. Multi-gap cold-cathode tubes. STANDARD TELEPHONES & CABLES, Ltd. Feb. 18, 1954, No. 4782/54. Class 39 (1). A gas-filled electric discharge tube comprising a plurality of electrodes mounted on a flat sheet of insulating material with a space between any two adjacent electrodes is characterized in that an obstacle is interposed in each space between two adjacent electrodes in such manner as substantially to prevent electric charges from being retained on the surface of the sheet in the said space when a discharge occurs to an electrode which bounds the said space. The multigap cold cathode tube shown is of the type described in Specification 692,415, and comprises storage cathodes in the form of sectorshaped members 1 of sheet-metal bent to provide cathode plates 2 and cathode tails 3 and transfer cathodes in the form of trapezoidal portions 5 provided at the end of each leg of a spider 4 The members 1 and spider 4 are arranged to lie in the same plane and are provided with dimples 6 which engage holes 7 in a mica washer 8. The cathodes are retained in position by means of an upper mica disc 9, the assembly being clamped between lower and upper shields 10 and 11 by means of tie-rods 21 (Fig. 2) which pass through respective sets of aligned holes such as 12, 13, 14, 15 and 16 in the respective members 10, 8, 1, 9 and 11, the arrangement being such that the wall 17 of the lower shield 10 lies just underneath the bentover portions 2 and 5 of the storage and transfer cathodes, while the wall 18 of the shield 11 lies in the surface of an imaginary cylinder containing the said wall 17. A cylindrical anode 19 is supported from the cathode assembly by means of a mica disc 20 secured above the shield 11, the anode being also secured by the tie-rods 21. The complete electrode assembly is mounted on a further mica washer (not shown) which positions the assembly with respect to the envelope 22. In accordance with the invention slots 23 and 24 are provided in the respective edges of the mica insulators 8 and 9 between the cathodes to prevent the accumulation of charges at these points. The invention may also be applied to tubes of the doubletrigger type and is not restricted to mica insulators but may be applied to ceramic or glass insulators. Alternatively, small areas of the insulator between the cathodes may be coated with conductive material which is connected to ground, or to some point of fixed potential. This alternative construction is particularly applicable to glass insulators.
Patent GB-198022-A (GB)
Title: Improvements in or relating to gas burners for cooking and other purposes
IPC: F24C3/08
Filed: 1922-02-18
Abstract: 198,022. Helps, G. Feb. 18, 1922. Portable gas stoves.-A ring carrying utensilsupporting rests is removably or detachably carried on the outside of a gas ring or an atmospheric burner of the type in which the mixture issues through a passage formed between the burner body and a flat head; in the case of burners having a movable valve head, the rests may be carried by the head. Fig. 11 shows a ring b carrying utensil rests d and removably mounted on lugs f on a gas-ring r. Fig. 3 shows a burner having a head a which may be adjustable, as shown, or fixed, a ring b carrying utensil rests d being rotatably mounted on lugs f and retained in position by a screw e which engages a groove g. When the head a is adjustable it may be rotated together with the ring b by means of a slot j, Fig. 6, which is engaged by a prolongation d<1> of one of the rests d. The burner head may be provided with a circular rack which is engaged by a tooth on the underside of the ring b in crder to retain the latter, together with the valve head, in the adjusted position. The teeth of the rack mav be numbered to facilitate adjustment, and the positions of the tooth and the rack may be reversed. Fig. 7 shows a valve head a carrying radial arms d.
Patent GB-780816-A (GB)
Title: Improvements in and relating to the production of cellulose ethers
Inventor: YOUNG JOHN ARTHUR
IPC: C08B11/12
Filed: 1955-02-18
Abstract: Cellulose carboxyalkyl ethers having a pH of 5.5-10 in a 1 per cent aqueous solution are prepared by etherifying alkali cellulose in the solid phase with a monohalogenated monocarboxylic acid or alkali metal salt thereof in the presence of free alkali, adding at the end of the reaction monohalogenated carboxylic acid equivalent to or slightly in excess of the amount of free alkali remaining and allowing the acid to react with the free alkali during ageing or drying or both.  In an example wood pulp sheets are steeped in 18.5 per cent soda containing 0.85 per cent hemicellulose for about two hours.  The liquor is drained off and the alkali cellulose is pressed until it contains 15 per cent total soda, after which it is shredded and 37.5 parts of solid sodium monochloracetate are added followed by 11.5 parts of monochloracetic acid.  At the end of the reaction a further 11.5 parts of monochloracetic acid are added and the product is dried at 70 DEG  C. for 8 hours.  The pH of a 1 per cent solution of the white product is 7.0.  Specification 532,292, [Group IV], and U.S.A.  Specification 2,517,835 are referred to.
Patent GB-1212601-A (GB)
Title: Improvements relating to weighing and mixing devices
IPC: A01K9/00
Filed: 1968-01-31
Abstract: 1,212,601. Feeding animals. F. WEYHAUSEN & CO. MASCHINENFABRIK G.m.b.H. 31 Jan., 1968 [16 June, 1967], No. 4900/68. Heading A1M. [Also Divisions B1 and G1] Apparatus for mixing a liquid and a powder comprises a mixing vessel 4 supported on one arm of a balance beam 8 on the other arm of which is slidable a weight 5 below which is freely suspended a second weight 6. Powder is supplied from a resiliently suspended hopper 11 by a vibrator 10, the rate of supply being adjustable by shutter 13; and liquid from a constant level tank 18 the temperature of which is thermostatically controlled. As mixture is withdrawn from vessel 4 the other end of the balance beam 8 sinks until the weight 6 strikes the base 7. Further mixture equal to that of the weight 6 can then be withdrawn, when the balance beam sinks again. During this last movement the microswitch 9 closes mixture outlet solenoid valve 2 and actuates vibrator 10, feeding powder into vessel 4 until balance is restored, when microswitch 9 switches off vibrator 10 and energizes time switch 14, which starts mixing motor 14 and opens solenoid valve 16 to supply water for a predetermined period; after which valve 16 is closed and valve 2 opened. As described the apparatus is applied to the mixing of powdered milk and water for supply to an animal feeding teat 1a but the invention can also be applied to automatic coffee and cocoa machines.
Patent GB-1063041-A (GB)
Title: Improvements in or relating to wave form shaping circuit arrangements
Inventor: ELLIS ALFRED BRIAN EDWIN
IPC: H03K5/12
Filed: 1964-02-06
Abstract: 1,063,041. Semi-conductor pulse circuits; pulse radar. MARCONI CO. Ltd. Oct. 13, 1964 [Feb. 6, 1964], No. 5017/64. Headings H3T and H4D. In a pulse shaping circuit, the input waveform a (e.g. from a radar receiver) is differentiated, giving waveform b, one of the differentiated pulses being inverted and the resultant c used to clamp the input a giving a sharper pulse e. As shown in Fig. 2, the input a is differentiated by a capacitor B1 and feedback amplifer B3. The negative half-cycles are passed by diode C1 and inverted at C3 before being combined with the positive half-cycles at c. Diode D1 removes portions below a threshold D2 and allows the wanted portions to pass to limiting diodes E2, E3 giving waveform d which is amplified at E6 and used to turn on transistor E7 which clamps the waveform fed via resistor R, giving the output e having short rise and fall times.
Patent GB-501311-A (GB)
Title: Improvements in vehicle brakes
IPC: F16D51/22
Filed: 1938-02-18
Abstract: 501,311. Internal-expanding brakes. FORD MOTOR CO., Ltd. Feb. 18, 1938, No. 5095. Convention date, June 26, 1937. [Class 103 (i)] In an internal-expanding brake having two shoes 14, 15 between one pair of adjacent ends of which is a wedge adjusting device 22 through which braking pressure is transmitted from one shoe to another, a centring spring 36 encircles the adjusting device and is provided with ends 37 bent at right angles and engaging between arms 40 on the adjusting device and a slot 38 in a plate 27 fixed to the backing plate 10. This spring also provides a resistance to the shoe 14 or 15 which is acting as servo shoe and prevents the whole of its pressure being transferred to the other shoe and thus causing grabbing. The adjusted housing is guided by a forked arm engaging a pin on the anchor plate and extends through a relatively large opening in the anchor plate to allow movement of the housing. The ends of the shoes extend through openings in the housing and are curved to fit directly against tapered grooves in the adjusting wedge. The shoes engage an anchor pin at the opposite end to the adjuster and are operated by a lever pivoted to one shoe and a link pivoted to the other shoe and engaging a socket in the lever.
Patent GB-988814-A (GB)
Title: Improvements in or relating to amplifying apparatus
Inventor: CASELLS PHILIPPE PATRICK CUTHB
IPC: H03F3/387
Filed: 1963-02-08
Abstract: 988,814. Transistor amplifying circuits. S. SMITH & SONS (ENGLAND) Ltd. Feb. 10, 1964 [Feb. 8, 1963], No. 5144/63. Heading H3T. In an amplifier of the choppermodulator type in which the input current to be amplified is applied to chopper means VT7, VT8 rendered conducting in alternate half-cycles so that during half-cycles of conduction the input current flows in the primary windings W1, W2 of a transformer the secondary winding of which is coupled to the input of a directly coupled amplifier, bias for the input stage (VT1) of the amplifier is provided by a capacitor C3 which is charged to a predetermined voltage during each of the alternate half-cycles in which the chopper means is not conducting. Input currents are, applied at terminals 1, 13 and 5, 19 to pass in alternate half cycles of a chopping voltage applied between terminals 11, 14 and 18, 20 through symmetrical transistors VT7, VT8 constituting chopper circuits as described in Specification 912,163. The chopped waveform, modified by the bias across capacitor C3, is amplified by transistors VT1 to VT3, the supply voltage for transistors VT1, VT2 being derived from capacitor C which is charged during the halfcycles when the chopper transistors are not conducting. The chopping voltage is applied between terminals 6 and 9 from a centre-tapped transformer winding, Fig. 2 (not shown), the centre-tap being connected to terminal 7 and to earth. Terminal 6 is negative when transistors VT7, VT8 are non-conducting so that capacitor C2 is charged through rectifier MR3, line 22 becoming negative with respect to the earth line 21. During the same half-cycles transistor VT6 is rendered conducting to by-pass largevalued resistor R1 by the positive voltage from terminal 9, so that capacitor C3 is charged towards the voltage of line 22 through transistors VT3, VT6 and resistor R6 to establish a predetermined bias thereon. Supply for transistor VT3 during the half cycles in which VT7, VT8 conduct is provided from terminal 6 through diode MR1, resistor R4 and diodes MR5, MR6. The signal at the collector of transistor VT3 is applied to an output stage comprising transistors VT4, VT5 and renders one more and the other less conducting so that an output may be taken from terminal 8.
Patent GB-850461-A (GB)
Title: A power driven rotary brushing mechanism
Inventor: BONGIOVANNI JOHN CHARLES
IPC: B08B1/02
Filed: 1957-02-15
Abstract: 850,461. Power brushing. OSBORN MANUFACTURING CO. Feb. 15, 1957, No. 5244/57. Class 60. [Also in Group XXVIII] A brushing stand has the brushes carried on arbors 39, 54 which also carry motors such as fluid motors 49, 72. The arbors are journalled in slides 1, 2 movable by jacks 27, 29, 64, 65. The fluid motors are controlled as disclosed in Specification 850,462. The whole assembly is carried on rollers 14, 15 for reciprocation along the brush axis as disclosed in Specification 809,162. The brushes are retained by tapered bores in 35, 36 engaging complementary members 37, 38, the bores being larger than the bearing assemblies 40 so that the brush shell 34 can be removed over the bearings. The brush strip 42 is preferably as disclosed in Specification 645,407.
Patent GB-581157-A (GB)
Title: Improvements in or relating to the production of organic esters of cellulose
IPC: C08B3/22
Filed: 1945-03-02
Abstract: Organic acid esters of cellulose are prepared by esterifying cellulose with an organic acid anhydride in the presence of an inorganic acid catalyst, neutralizing part or all of the catalyst before the ripening operation and continuously incorporating water during a substantial part of the ripening operation.  The cellulosic material may be cotton, cotton linters, wood pulp or regenerated cellulose or other cellulosic material derived from such sources as grasses, straws and hulls.  The cellulose may be pretreated with acetic or formic acid or a mixture of these acids to which a small proportion of sulphuric acid may be added.  The acid catalyst is preferably sulphuric acid, but phosphoric acid or a mixture of phosphoric and sulphuric acids may be used. Before ripening, the catalyst is wholly or partly neutralized by the addition of an acetate of magnesium, calcium or zinc, or oxides, carbonates or hydroxides of various metals.  The water for ripening is preferably added in the form of dilute acetic acid. Ripening may be carried out at 50-117 DEG  C., water being added continuously until at total of 1 to 12 times the weight of the cellulose has been added.  Ripening is then continued until the desired acetyl value is obtained.  In an example, cotton linters are acetylated with a mixture of acetic anhydride, glacial acetic acid and sulphuric acid for three hours, the peak temperature being 37 DEG  C.  Excess anhydride is destroyed by the addition of just sufficient water, and part of the sulphuric acid is neutralized by the addition of a neutralizing agent.  The solution is maintained at 33 DEG  C. for 30 minutes and then at 60 DEG  C. for one hour.  Ripening is then carried out, water being added continuously for a period of 10 hours.  Ripening is continued for a further 16 hours before precipitation of the acetate by the addition of water.  The acetate obtained has an acetyl value of 44.3 per cent calculated as acetic acid.