baber/WOPTO huggingface dataset:
Patent GB-1135624-A (GB)
Title: Pulse width modulator
IPC: H03K7/08
Filed: 1966-01-11
Abstract: 1,135,624. Pulse modulation systems; transistor pulse circuits. SCHNEIDER RADIOTELEVISION. 11 Jan., 1966 [4 Feb., 1965], No. 1326/66. Headings H3T and H4L. A pulse width modulator comprises a monostable multi-vibrator which is triggered from its stable condition to its astable condition by positive pulses at terminal 13, Fig. 2, each pulse causing a normally conductive transistor 1 to be cut off and a transistor 2 to take current. A timing capacitor 3 then charges through a transistor 18 which is arranged to give a substantially constant current and this continues until it reaches a potential which is controlled by the voltage of a modulating source. The constant current from the transistor 18 is at this point halted or partially diverted and the consequent diminution of the current to the capacitor 3 causes resetting of the multivibrator, so that the transistor 2 is cut off. A pulse is produced at the output terminal 14 having a duration directly related to the magnitude of the instantaneous voltage of the modulating source. In a first embodiment the parts referenced 22-25 in Fig. 2 are omitted. Voltage sources 15, 16, 20 have fixed values, and voltage source 19 is the modulating source, with a maximum value less than that of the source 20. After triggering, charging of the capacitor 3 continues until the voltage across it reaches the value of the voltage of source 19 plus the value of the source 15, when the current ceases and the multi-vibrator resets to its stable condition. In a second embodiment, including the parts referenced 22-25 in Fig. 2, voltage source 19 has a fixed value, and the voltage source 25 is the modulating source. After triggering, charging of the capacitor 3 continues until it reaches a potential equal to that of the modulating source 25, which is connected through a diode 22. As the potential tends to rise further, part of the constant current from the transistor 18 is diverted to charge a capacitor 23, and the consequent diminution of the current to the capacitor 3 causes resetting of the multi-vibrator. The duration of the magnitude of an output pulse is directly proportional to the sum or difference of the voltages of the modulating source 25 and the fixed source 15. In a third embodiment, a system comprises two modulators 30, 31, Fig. 3, of the kind described which are triggered together, a terminal 24 of system 30 being connected to a modulating source 33 and a corresponding terminal 24 2  of system 31 being connected to earth. The output pulses of the two systems are differentially combined at 36, to produce an output pulse of duration proportional to the instantaneous voltage of the modulating source 33. The output of the circuit 36 is also connected, together with the output of the system 31, to a flip-flop circuit 38, from which an output is obtained indicative of the polarity of the output of the circuit 36. Overvoltage protection at the terminal 24 1 , comprising oppositely directed diodes 46, 47 biased by sources 48, 49, may be provided.
Patent GB-1187192-A (GB)
Title: Improvements in Sensitized Silver Halide Emulsions.
Inventor: KALENDA NORMAN WAYNE
IPC: G03C1/28
Filed: 1968-01-10
Abstract: 1,187,192. Colour emulsions. EASTMAN KODAK CO. Jan.1, 1969 [Jan.10, 1968], . No. 1403/68. Addition to 1, 129, 119. Heading G2C. Silver halide emulsions are super-sensitized (according to the parent Specification) with (1) at least one bi-nuclear merocyanine dye and (2) at least one polycarbocyclic aromatic compound which is not a sensitizing dye but contains a sulpho group or a water soluble salt thereof as a substituent in an aromatic carbocyclic ring which is connected to or forms part of a polycarbocyclic aromatic group, and contain (3) a colour coupler.
Patent GB-820302-A (GB)
Title: Improvements in or relating to electrical waveguide arrangements including a window seal
Inventor: ALDOUS WILLIAM HERBERT
IPC: H01P1/08
Filed: 1956-01-16
Abstract: 820,302. High-frequency discharge apparatus. GENERAL ELECTRIC CO. Ltd. Jan. 16, 1957 [Jan. 16, 1956; Oct. 15, 1956], Nos. 1484/56 and 31388/56. Class 39(1). [Also in Group XL(b)] A window of insulating material in a waveguide for transmitting high frequency electrical oscillations, e.g. into the evacuated space of an electron accelerator, consists of a plate of synthetic corundum of single crystal form so orientated that the optic axis of the crystal is perpendicular to the direction of the electric vector of the mode in which the oscillations are transmitted. The optic axis may be perpendicular to the plane of the plate or in the same plane. The corundum plate may be in the form of a circular disc which is sealed in a metal cup as described in Specification 796,884. The second Provisional Specification also mentions the use of the window in connection with thermionic valves and T-R cells. Specification 820,301 also is referred to.
Patent GB-161698-A (GB)
Title: Improvements in or relating to shaft couplings
IPC: F16D3/80
Filed: 1920-01-16
Abstract: 161,698. Roberts, J. S. Jan. 16, 1920. Shaft couplings.-A flexible shaft coupling, which may be adapted for use as a torque-indicator, governor, or cut-out, consists of a sleeve c in sliding engagement, as by the squared end b<1>, with one shaft section b, and in screwing engagement with the other section a. The end of this section a and a wall c<4> define a chamber in the sleeve, divided by a floating piston d, which may be flexibly connected, as by a spring, to the sleeve c, into a compartment c<3> containing air or other compressible fluid under atmospheric or other pressure, and a compartment c<2> containing oil, petroleum jelly, or other fluid or semifluid to act as a seal. Torsional shocks are elastically absorbed by compression of the air &c. consequent upon endwise motion of the sleeve. A gland c is provided, and an additional hydraulic packing-ring f may be fitted. Means such as cocks may be provided for the replacement of fluid lost by leakage &c., or the chamber c<2> may communicate through a non-return valve g and drilled passage a<2> in the shaft a with a source of oil under pressure, such as a forcedlubricated bearing, or, for heavy loads which, unlike rolling-mill and heavy motor-lorry drives, do not frequently fall to a low value, a cam-operated multi-stage rotary pump with radially-disposed plungers returned by a spring, by centrifugal force, or both, which pump supplies an air vessel, the feed being controlled by a by-pass, which may be automatically actuated through linkage by the travel of the sleeve when leakage occurs. The pumps may be axially disposed and actuated directly by motion of the sleeve, the by-pass device being operated in conjunction or independently. In a modification, the air chamber c<3> is contained in a bore of the shaft a, within which the piston d slides. Cocks may be fitted for replacing air lost by leakage or by being dissolved, and means may be provided for maintaining any desired pressure while the apparatus is at rest. Mention is made of the increase of air pressure due to heating under compression. When the coupling is used as a governor, cutout, or torque-indicator, the axial motion of the sleeve is communicated by links &c. to the parts.
Patent GB-828690-A (GB)
Title: Improvements in or relating to the purification of olefine polymers
IPC: C08F10/00
Filed: 1956-01-17
Abstract: Polyolefines obtained by polymerization in an inert hydrocarbon using a transition metal compound type of catalyst (e.g. TiCl4+AIR3 or LiAIR4) are purified by introducing an alcohol with or without a metal alcoholate into the solution of poly-olefine in the reaction mixture, followed by heating to 125-225 DEG  C. and then precipitating the polyolefine by the addition of further alcohol or alcohol with metal alcoholate. The Specification discloses the use of methanol, ethanol, isopropanol, butanol, lithium and sodium methylates, lithium butylate and unspecified, optional alkaline reactants.  The products are of reduced ash content and reduced grease (low M.W. polymer) content.  In examples the inert hydrocarbon medium is cyclohexane and the purification is adapted to a continuous, ethylene polymerization process.
Patent GB-564701-A (GB)
Title: An improved method of colouring synthetic resins
IPC: C08K5/00
Filed: 1942-12-30
Abstract: Polymethyl methacrylate resins are coloured for use in producing surgical and dental prostheses, e.g. teeth, crowns, bridges and inlays by incorporating red and yellow dyes in liquid methyl methacrylate monomer and blue pigment in powdered polymethyl methacrylate and mixing the coloured monomer and polymer.  White and/or black pigments may also be added to the powder.  Suitable dyes and pigments are specified.
Patent GB-1434867-A (GB)
Title: Process and apparatus for the fully automatic production of filled gusseted bags
IPC: B65B1/02
Filed: 1974-01-15
Abstract: 1434867 Making bags SIEGRHEINISCHE REGISTRIERWAAGENFABRIK FIX PETER STEIMEL KG 15 Jan 1974 [15 Jan 1973] 01852/74 Heading B5D [Also in Division B8] In apparatus for the production of filled and closed gusseted plastics bags, gusseted plastics tubing is drawn from a supply roll by feed rollers 38 to a bag making station I where pneumatically operated grippers I, welding jaws 44, 45, and knife 46 act at measured intervals to produce open bags. Each bag is conveyed in a seat 36 of a four-armed turntable 37 to a filling station II while held by grippers 1 associated with that arm of the turntable. The bag is opened by suction nozzles 8, 9 on mounts 10, 11 interconnected by rods 12, 13 to bag gripping jaws 3, 6, gripper 1 being first opened by control valve 5. Filling spout 17 is now lowered by air cylinder 18 until insertion flaps 21, 22 enter the bag whereupon they are spread apart, sensing feelers first determining whether a bag is present and open. A measured amount of the product is then delivered to the bag, the bag being initially raised somewhat by frame 33 to ensure proper filling. An air blast from tubes 16 cleans nozzles 8, 9 before the next bag arrives. The filled bag proceeds on the turntable to a closing station III where a transverse closing weld-seam is made by reciprocable jaws. After a cooling dwell period at transfer station IV, the seat 36 is tilted and the bag passes to a further conveyer. In another embodiment, pairs of bags are made and carried round the turntable in twin seats 36.
Patent GB-304471-A (GB)
Title: Improvements in hand-bags
IPC: A45C3/06
Filed: 1928-01-20
Abstract: 304,471. Brooks & Co., Ltd., J. B., and Horden, H. R. Jan. 20, 1928. Bags.-Relates to bags &c. having rectangular mouths the ends of which are fitted with inwardly folding two-part struts which fold together when the bag &c. is closed. According to the invention the front and rear edges of the bag are stiffened by separate strips 6, 6 located in closed pockets 7, 7, and the ends are fitted with separate inwardly folding two-part struts 9, 9, in pockets 11, 11. The struts 9, 9 may be of the type described in Specification 304,910. A stiffened angle or channel sectioned hood 13 may be hinged to the rear edge of the bag or case to cover the mouth of the bag in the closed position. The bottom of the bag may be stiffened by two boards hinged together along the centre so that the bag can be folded longitudinally. The pockets for the struts &c. may be formed by stitching on a piece of lining, or by folding over the top edges of the bag. In a modification straps are secured to the rear stiffening strip for attaching the bag to a bicycle. An outside pocket and a strap which passes completely around the bag may be added thereto.
Patent GB-270207-A (GB)
Title: Improvements in or relating to apparatus for use in dog-racing
IPC: A63K1/02
Filed: 1927-01-21
Abstract: 270,207. Shaughnessy, J. L. Jan. 21, 1927. Dog-racing apparatus.-In dog-racing apparatus in which an artificial lure 19 is carried by a car 10 round or along a track 12, the arm 18 on which the lure is mounted is fulcrumed on a pin 26 and also has an axial movement on the pin. A. bracket 21 carries the arm and a second arm 35 engaged by a latch 40 prevents the arm 18 when outstretched from returning to a position within the car housing 52, in which direction it is urged by a spring 33. A wedge 46 is moved by a lever 50 into the path of a link 42 connected to the latch 40 to release the latch when it is desired to withdraw the lure. The axial movement of the bracket 21 is produced either by interengaging cam surfaces or quickpitch threads on the pin and bracket.
Patent GB-104523-A (GB)
Title: Improvements in or relating to Dry Docks.
Inventor: BHAPPU KEKI CURSETJI
IPC: B63C5/02
Filed: 1916-02-08
Abstract: 104,523. Bhappu, K. C. Feb. 8, 1916. Docks. - Rams H, manually operated by means of a key applied to pinion gearing, are built into the masonry of a dry dock and project to engage the hull of a ship A.
Patent GB-100995-A (GB)
Title: Camping Attachment for Vehicles.
Inventor: BRETTEVILLE GUSTAV DE
IPC: B60P3/34
Filed: 1916-02-09
Abstract: 100,995. Bretteville, G. de. Feb. 9, 1916. Vehicles convertible into bedsteads; berths or sleeping-compartments; ambulances; table, shelf, and like fittings.-An automobile or other road vehicle is fitted with a camping or ambulance attachment comprising a casing A' mounted at the rear of the vehicle body, a frame 8 adapted to be moved rearwardly out of the casing and supported in such position, and containers 11, 12 movable transversely out of the frame. The casing encloses a foldable bed 10 and is normally closed by a hinged rear door 6, which can be turned from the position shown in Fig. 7 to that shown in Fig. 4 and supported by a dovetailed sliding member 15 secured by thumb-screws 16. Detachable and adjustable supporting legs 18 may also be secured to the door. Compartments 28 with longitudinal partitions are formed in the roof of the casing to receive guns, fishing-rods, &c. The containers 11, 12 divided into compartments to receive kitchen utensils, are mounted to slide in guides 13 secured to the top 9 of the frame 8, and are supported in extended position by arms pivoted to the frame 8. The hinged door of the container 11 serves as a table. When used as an ambulance, the outer end of the bed may be supported at an angle to the inner end by chains or straps secured to the casing A<1> or to the frame 8. The bed may be warmed by the provision beneath it of a chamber heated by exhaust gases from the motor, either directly or by circulating-connexions from an intermediate chamber so heated,
Patent GB-244291-A (GB)
Title: Improved means for lubricating rotary members
IPC: F16N9/02
Filed: 1925-01-22
Abstract: 244,291. Garner, H., and Garner, J. P. Jan. 22, 1925. Addition to 170,639. Centrifugal-action lubricating; lubricant conveyed by mechanical means.-The device of the parent Specification for lubricating wheel hubs, comprising a vane 2 rotating with the wheel and lifting lubricant from a reservoir 1 in the wheel into a pocket 3 in the hub 5, is modified by providing a stationary pipe 11 mounted on the end of the axle 7 and having its open outer end dipsposed closely adjacent to the inner wall of the reservoir, so as to recaive oil clinging to the wall at high speeds and deliver it through an aperture 12 into the pocket 3. The outer end of the pipe is bent so as to face the direction of rotation of the wheel. The pipe is carried by an arm 10 secured by a screw 13 to a cotter pin 9 which passes through the axle end and secures thereon a short sleeve 8.
Patent GB-228170-A (GB)
IPC: B61D9/02
Filed: 1925-01-22
Abstract: 228,170. Henschel & Sohn Ges. Jan. 22, 1924, [Convention date]. Tip-wagons. -A sidetip-wagon a is supported in the loading position by rotatable supports c pivoted at f to the frame d, a horizontal bearing surface b being provided on each end of the container to bear upon the rounded heads of the supports c. The frame of the wagon is provided at each end with upwardly curved guiding surfaces h against which rollers g, on the container, bear when the wagon is in the loaded position. The supports c are each provided with a slot p concentric with the pivot f, the lower end of the slot being extended transversely of the vehicle to correspond with a similar slot cut in the frame d. A pin e passes through the slot in both the frame d and support c and the two pins e at each end' of the wagon lie on either side of a two armed lever m pivoted at i to the frame d, the lower arm of the lever w being provided with a pin which works in a slot formed in a lever l on a longitudinal shaft q operated by hand-levers k. The two pins e are connected by a tension spring which retains the pins in the transverse slots n to lock the supports c, and the bottom of the container is weighted at t to lower its centre of gravity. When the lever k is moved in the direction shown by the arrow A, Fig. 1, the left hand pin e is moved to the left and enters the slot p in the support c which rotates about the pivot f and lowers one end of the bearing surfaces b on to the curved top r of the frame d and rolls thereon until the left hand roller g strikes against the nose s of the left hand support c, Fig. 2. This support c is thereby pressed back into its original position, turning on the bolt f and is locked by the bolt e. The container a then reaches the discharging position, Fig. 3, where it is held by a locking device of known construction (not shown). After being released from the locking devise, the empty container returns to its loading position by the angleiron b rolling over the back and head of the sup. port c. In a modification the slots p and pins e are not used, the upper arm of the lever m being sector-shaped and engaging both supports c in the loaded position of the container, a movement of the lever k collapsing one support to discharge the wagon. The, heads of the supports c may be provided with rollers, and the wagon may be tipped on either side by a single lever or the levers may act through a ratchet wheel and pawl.
Patent GB-577605-A (GB)
Title: Perfumer
IPC: A45D34/06
Filed: 1944-02-03
Abstract: 577,605. Boxes combined with other articles. PAPPAS, M. Feb. 3, 1944, No. 2004. [Class 18] [Also in Group VI] A container 1 having open perfume wells 21 and a rotary fan 16, may have annular shoulders 2 and 3 on either of which a detachable cover 4, provided with a powder compartment 6 having a lid 7 and mirror, may be tightly fitted. The fan is driven by a manually operated cogwheel 19 and gear train, and may have a guard 22. Externally accessible compartments hold lipstick 10, eyebrow pencil 11 and perfume 12.
Patent GB-389235-A (GB)
Title: Exhaust silencer
IPC: F01N1/08
Filed: 1932-01-22
Abstract: 389,235. Exhaust-silencers. HOYT, A. H., 212, West Street, Ware, Massachusetts, U.S.A. Jan. 22, 1932, No. 2014. [Class 7 (ii).] The silencer, which the gases enter at 7, consists of an inner shell A in the form of a series of frusto-conical expansion chambers 8 of decreasing size towards the rear end which is closed. The chambers are connected by sloping walls 10 having a number of apertures 14 to which are fitted the smaller ends of rearwardly-directed tapering discharge tubes 15 arranged in staggered formation. The plate 6 closing the rear end is also apertured to receive a number of similar tubes 15<1>. The shell is made in halves secured by bolts passing through three pairs of lugs 12 to which are attached brackets 20 for securing the shell to an outer casing B which is of greater length than the shell. The gases escaping through the tubes 15 will draw cold air through the space between the shell and casing.
Patent GB-136356-A (GB)
Title: Improvements in Gas Furnaces.
IPC: F23C3/00
Filed: 1919-01-28
Abstract: 136,356. South Metropolitan Gas Co., and Chandler, D. Jan. 28, 1919. Gaseous-fuel furnaces.-In a gas-heated gloryhole for use in glass-melting, a portion of the air for combustion is led through a pipe e and delivered tangentially into the furnace a at or near the point where the flame from the burner b impinges on the furnace wall.
Patent GB-411582-A (GB)
Title: Improvements in or relating to the manufacture of veltschoen footwear
IPC: A43B9/02
Filed: 1933-01-23
Abstract: 411,582. Boots &c. WOOD, F. A., 181, Putney Bridge Road, London. Jan. 23, 1933, No. 2123. [Class 17 (ii).] In veldtschoen of the kind in which an inner lining attached to an insole is enclosed by an upper having an outwardly-turned edge stitched to a mainsole, the lining 1 and the insole 5 are secured together by stitches 6 passing diagonally through the lining and the vertical edge of the insole, 2, and an intermediate sole and the upper are secured to the insole and the lining respectively, and to each other by means of adhesive. The lining comprises the usual main lining 1, side linings 2, toe puff, and heel stiffener secured together by adhesive and the stitches 6. The sole portion of the shoe may include a rubber sheet 7x in addition to an intermediate sole 7 and mainsole 9, all of which are secured together by adhesive and by stitches 12 passing through the outwardly-turned edge of the upper.
Patent GB-742483-A (GB)
Title: Improvements in or relating to fluotitanates
IPC: C01G23/00
Filed: 1953-01-26
Abstract: 742,483. Fluotitanates. SPENCE & SONS, Ltd., P. and BROWN. G. T. Jan. 14, 1954 [Jan. 26, 1953], No. 2131/53. Classes 1(2) and 1(3) In a process for preparing fluotitanates an aqueous mixture of titanium tetrachloride and hydrofluoric acid is reacted with a water-soluble fluoride, which may be the acid salt such as potassium hydrogen fluoride; the crystalline product of fluotitanate settles out. The reaction temperature is maintained between 15‹C. and 70‹C.
Patent GB-1016698-A (GB)
Title: Clay grouting compositions
Inventor: SINCLAIR LESTER HENRY
IPC: C04B33/13
Filed: 1963-01-17
Abstract: An aqueous grouting composition comprises 5-30% clay, 0.5-15% of an alkali metal silicate and 0.1-4% of an alkaline peptizing agent. Peptizing agents specified are tetrasodium pyrophosphate, tri-sodium phosphate and a caustic solution of quebracho.  Clays specified are bentonite and sub-bentonites.
Patent GB-811191-A (GB)
Title: An improved process for the prevention of the formation of slime in the manufacture of chemical or mechanical pulp and paper
IPC: C02F1/50
Filed: 1957-01-21
Abstract: 811,191. Slime prevention. OSAKEYHTIO KESKUSLABORATORIO CENTRALLABORATORIUM A.B. Jan. 21, 1957 [Jan. 20, 1956],No. 2177/57. Class 96. Formation of slime, during the manufacture of chemical or mechanical pulp and paper, is prevented by adding intermittently to the circulating water a compound which, in aqueous solution, is completely or partially dissociated into bisulphite ions. The pH value of the circulating water may be maintained between 4 and 6 by adding sulphuric or formic acid, aluminium sulphate, sodium hydroxide, soda or lime. Sulphurous acid and sodium bisulphite are suitable compounds for use with neutral or alkaline circulating water; sodium sulphite is suitable for acidic water. The compound may be used at a concentration corresponding to 200 or 450 m.g. of sodium bisulphite per litre of circulating water, addition being made over a period of 30 or 15 minutes, respectively, at intervals of one day.
Patent GB-1098843-A (GB)
Title: Method of manufacturing high-temperature heat-insulating articles
Inventor: KAMENETSKY SOLOMON PAVLOVICH
IPC: C04B38/08
Filed: 1965-01-19
Abstract: Heat insulating articles are obtained by adding a thinner, e.g Na abietate, to an aluminous binder in the form of a clay slip, then expanded perlite and a thickener, shaping, drying and firing, e.g. at 800-1000 DEG  C.  Ureaformaldehyde resin is the thickener specified. Firing removes the organic materials, giving increased porosity.