baber/WOPTO huggingface dataset:
Patent GB-273866-A (GB)
Title: Improvements in circular saws
IPC: B27B33/02
Filed: 1926-05-27
Abstract: 273,866. Tingle, E., and Leitch, J. May 27, 1926. Saws.-The teeth of circular or other saws are arranged in groups of four, each group comprising a pair of oppositely-bevelled cutting teeth 1, 2, a planing tooth 3 and a smaller bevelled tooth 4, with gullets 9, 10 as shown. Alternate groups have the bevelled teeth oppositely arranged. The bevel on the rearward edges of the bevelled teeth may be omitted. The teeth are unset and slightly wider at their tips than at their bases.
Patent GB-664793-A (GB)
Title: Improvements relating to machines for casting metals
IPC: B22D11/11
Filed: 1949-05-19
Abstract: 664,793. Continuous casting - machines. MOND NICKEL CO., Ltd. May 19, 1949 [June 5, 1948], No. 13448/49. Class 83 (i). In a casting-machine in which a ladle is arranged below a delivery spout and above the inlet to a vertical mould, a protective hood through which an inert gas may be circulated encloses the mouth of the spout and the ladle and is formed with a removable section giving access to the ladle for repair or replacement. The invention is shown applied to a continuous casting-machine in which metal from the melting furnace passes through a spout 32 into a ladle 16 having an outlet 23 vertically above a water-cooled mould 1. The protective hood comprises a bottom section 5 and three upper sections 6, 7 and 8, the latter section being clamped to the sections 5 and 7 by means of eye-bolts 40, 43 with wing- nuts, and at its lower edge, projecting into a sealing channel 14. Inert gas is supplied to the hood by way of pipe 11, duct 10 and openings 10a therein and is withdrawn through an outlet 12 at the top of the section 7. The ladle is provided with a refractory lining 22 and skimming baffle 27 and is mounted so as to be adjustable from outside the hood. A bar 21 welded to the furnace end of the ladle rests in two threaded blocks 19 which are independently adjustable longitudinally of the hood by means of threaded rods 15 passing through stuffing- boxes 17 and having operating wheels 51 outside the hood. In addition, the ladle may be tilted by means of a rod 26 bearing on the bottom of the ladle and connected by a curved arm 24 to a shaft 25 rotatable by worm gear outside the hood. Sight glasses 44, 44<SP>1</SP> and 45 are provided in the hood. The section 8 is also provided with a clearing opening 46 above the mould inlet and with a pipe 54 leading to a pressure gauge. A gas ring 48 is located in an opening 13 in the bottom section 5 beneath the ladle outlet 23.
Patent GB-1148091-A (GB)
Title: Improvements in or relating to electrolytic conductivity measuring and control systems
Inventor: WARMOTH DENIS
IPC: G05D21/02
Filed: 1965-03-30
Abstract: 1,148,091. Automatic mixture control. ELECTRONIC SWITCHGEAR (LONDON) Ltd. June 30, 1966 [March 30, 1965], No.13482/65. Heading G3R. In a system for automatically maintaining the composition of a liquid within predetermined limits, a conductivity cell in the liquid forms part of an A.C. bridge circuit associated with the input of a transistor amplifier the output of which controls the composition of the liquid through a phasesensitive detector and a contact-making relay. In one arrangement for maintaining rinsing water below a predetermined level of contamination, a conductivity cell in the water forms one arm of a mains energized adjustable bridge circuit the output of which is applied to a multi-stage transistor amplifier the first stage of which utilizes a field effect transistor. The amplifier output, together with alternate half cycles at mains frequency, are applied to a transistor discriminator so that, when the bridge output has a phase sense corresponding to excessive contamination, the discriminator causes a Schmitt-trigger operated relay to be in such a condition that a motor or solenoid operated valve is opened to supply fresh water to the rinsing tank. Pilot lights indicate the condition of the circuit which may be arranged to fail safe. A known resistor may be switched in place of the conductivity cell for test purposes. A switch may also be operated to maintain the trigger circuit in the condition it has at any time, and to connect an indicator, with suitable compensation and gain adjustments, so that the conductivity may be measured by manually balancing the bridge circuit. In a modification for maintaining a desired concentration of a chemical process solution, the bridge and discriminator are energized at a higher frequency from a transistor oscillator and a temperature variable resistor is included in the bridge circuit to compensate for temperature variations. Two conductivity cells, one in the liquid and the other in a reference liquid are arranged in the bridge circuit in an alternative arrangement.
Patent GB-206808-A (GB)
Title: Improvements in circular knitting machines
IPC: D04B1/10
Filed: 1923-05-23
Abstract: 206,808. Barth, E. Nov. 7, 1922, [Convention date]. Circular machines; needle-beds; knitted fabrics. -Diagonal patterns are knitted in continuous spirals without float threads on a machine with a rotatable cam ring by the use of a device which rotates the needle cylinder a intermittently. The cylinder a is carried by a ring c with ratchet teeth n and is driven round by a pawl m pivoted to a bell-crank l which is operated by a tappet h and' a spring plunger carrying a roller k. The patterning threads are carried by stationary guides q. Fig. 3 shows the pattern produced. Some other patterning effects are also illustrated.
Patent GB-400126-A (GB)
Title: Improvements in or relating to the construction of envelopes
IPC: B65D27/22
Filed: 1933-05-10
Abstract: 400,126. Envelopes. YOUNG, W. H., 6, Emerson Street, Southwark Bridge, London. May 10, 1933, No. 13638. [Class 146 (ii).] An envelope for non-adhesive closure and having a closure flap a of normal shape is provided during manufacture with a curved slot d in the surface opposite to that bearing the closure flap, so that when the flap is pushed within the envelope its edge enters the curved slot to provide a closure which prevents entry of other articles during transit.
Patent GB-469782-A (GB)
Title: Improvements in or relating to shaving devices
IPC: B26B19/04
Filed: 1936-05-14
Abstract: 469,782. Shaving-machines. TE PAS, E. J., and BERG, E. G. May 14, 1936, No. 13685. Convention date, May 14, 1935. [Class 131] In a hair-cutting machine comprising a cutter head carried by a handle, the cutter head having a hollow outer guard member 10, Fig. 10, with a series of cutter bars supported at each end., and a movable toothed cutter 8 inside the guard member, the slots 11 at the inner side of the guard member project beyond the cutter teeth 16 to permit free entry of hairs between the cutter bars so that they are in a position to be severed when advanced further into the slots of the guard member. As shown partly in Fig: 4, a two-part handle 1, 2 carries an electric motor on the shaft of which is a starting wheel 5. The guard member 10 is in two parts hinged at 12 and having depending lips 13 which are forced together against a spring 15 by adjusting screws 14. The movable cutter of the form shown in Fig. 10 has sharply pointed teeth 16 and bearing arms 34 co-operating with the side of the guard 10. The cutter is driven by an eccentric pin 6 on the motor shaft. Fig. 6 shows a modification employing a single cutter head secured to the handle by hollow threaded members 22 which also carry spring-urged pins for pressing the cutter against the guard member. The width and thickness of the guard bars is variable over their length becoming wider and thinner at the line defined by the points of the cutter teeth. The guard member may have two sets of slots 11 staggered as shown in Fig. 9. In a modification, Fig. 11, the cutter is indented at 43 to permit hair to approach the cutting edges freely. In the form shown in Fig. 21, the guard slots are of uniform thickness. Springs 85 press the movable cutter 84 against an adjustable bearing plate 86. Several other modifications having one and two sets of fixed cutter bars are described, registering projections and grooves being formed on the relatively movable parts to maintain them in position. In a further modification, Fig. 25, the movable cutter 104 is slotted at 110 and has tapered screws 111 at each end whereby the width of the slot may be varied. The ends of the cutterteeth thus can be adjusted in relation to slots 103 which are of varying depth. Fine teeth 112 formed between the two sets of slots are provided for the purpose of raking up hairs lying close to the skin. A raised central member similarly toothed may be provided on other forms of the invention or a bar 122, Fig. 29, having notches 123 may be used for the same purpose. The motor starting wheel 5, Fig. 4, may be replaced by a push-button starter which imparts an impulse to the motor shaft through a pawl and ratchet or through a one-way roller clutch.
Patent GB-669585-A (GB)
Title: Process for the manufacture of 2-amino-4-methyl-pyrimidine and n-alkyl and n-aryl derivatives thereof
Filed: 1949-05-23
Abstract: 2-Amino-4-methylpyrimidine and its N-alkyl and N-aryl derivatives are manufactured by condensing guanidine or a derivative thereof substituted in an amino group by an alkyl, aryl, or acyl group (the last-named, if present, being split off in the reaction) with a 4-alkoxybutene-3-ine-1, preferably in the presence of an acid condensing agent, advantageously at room temperature or slightly elevated temperatures (not above 30 DEG  C.). In examples: (1) and (2) 4-ethoxy- or 4-methoxy-butenine is added with stirring to a solution of guanidine carbonate in 80 per cent sulphuric acid to produce 2-amino-4-methylpyrimidine; (3) 4-methoxybutenine is added gradually to a solution of n-butyl-guanidine sulphate in 75 per cent sulphuric acid to give 2-n-butylamino-4-methylpyrimidine; (4) 4-methoxybutenine and phenylguanidine in 80 per cent sulphuric acid yield 2-phenylamino-4-methylpyrimidine.  The Specification as open to inspection under Sect. 91, comprises also references to the use of the following additional starting materials: acetyl-, benzoyl-, methyl-, ethyl- and benzyl-guanidine, and guanidines substituted by an azomethine or a cyano group; propyloxy- and butyloxy-butene-3-ine-1.  This subject-matter does not appear in the Specification as accepted.
Patent GB-1072145-A (GB)
Title: Fluid flow machine for exampls a gas turbine engine or lift fan
Inventor: BRIDGE ROBERT
IPC: F01D5/26
Filed: 1965-03-31
Abstract: 1,072,145. Gas turbine engines; axial-flow fans and compressors. ROLLS ROYCE Ltd. March 11, 1966 [March 31, 1965], No. 13764/65. Headings F1C, F1G and F1T. [Also in Division F2] In a fluid flow machine, for example a compressor or a turbine of a gas turbine engine, having at least one stage of adjacently disposed stator vanes and rotor blades, the ratio of the number of stator vanes to the number of rotor blades in the or each stage is given by 1À1n (1 + M) where n is the number of the harmonic which it is desired to eliminate together with any lower harmonies, and M is the rotor blade tip Mach. number at the speed up to which the desired elimination is required, M being calculated in relation to the medium in which the rotor is working. In the gas turbine engine shown the compressor has two rows of stator blades 16 and 18 with a row of rotor blades 17 there-between, there being nineteen blades in the rotor blade row 17. The Mach. number (M) of the tip speed of the rotor blades 17 at the speed for which it is desired to eliminate the fundamental harmonic is 0À8 so substituting in the formula the required ratio of the stator blades 16 to rotor blades 17 is (1À1) (1) (1À8) =1À98 so that the number of stator blades required is (1À98) (19) = 37À6. The number of blades was thus 38 in both stator blade rows 16 and 18, the most suitable angular disposition being found by experiment. The rotor blades may be formed with a hollow internal cavity and apertures by which boundary layer suction may be applied thus tending to remove wakes and turbulence.
Patent GB-1345126-A (GB)
Title: Production of hollow bodies of semi-conductor material
IPC: B23K26/00
Filed: 1972-03-24
Abstract: 1345126 Semi-conductor hollow-wave; welding by fusion SIEMENS AG 24 March 1972  [28 April 1971] 13795/72 Headings B3A and B3R A method of producing a hollow body of semiconductor material comprises contacting adjacent open end faces 3, 4 of at least two hollow semi-conductor bodies 1, 2 and then welding the contacted faces. The end faces are ground and lapped prior to assembly and may be preheated in the weld region using high frequency heating to approximately 1000‹ C. The various welding methods include welding by an electron beam 7 under vacuum, welding by plasma torch (11),  Fig. 3 (not shown), by arc or heat rays, in particular by a laser beam, in an inert e.g. argon atmosphere, and high frequency welding in inert gas or vacuum. A high frequency induction coil (9), Fig. 2 (not shown), may be used to preheat silicon tubes 1, 2. A graphite or ceramic plug 5, provided with a quartz fabric surface 6, may be used below the weld point to improve centering and support of the tubes which are rotated during welding.
Patent GB-354238-A (GB)
Title: Method of and means for regulating working quantities
IPC: G05B5/01
Filed: 1930-05-05
Abstract: 354,238. Speed governors. SIEMENS & HALSKE AKT.-GES., Siemensstadt, Berlin. May 5, 1930, No. 13815. Convention date, June 14, 1929. Addition to 353,899. [Class 57.] A modification of the apparatus described in the parent Specification in which simultaneously with each regulating movement the speed of one of the two members 34, 38 is temporarily altered so that the members are restored to their normal relative positions in which no regulating movement is produced. As adapted to regulate the frequency of an alternating current line, a synchronous motor 71 driven from the lines 25 is connected to a commutator 27 supplying coils for rotating a Z-armature 31, a quarter of a revolution per impulse, said armature being geared to an arm 34. A comparison arm 38 is driven by a similar system from a continuous current meter 44, the speed of which is also controlled by an electromagnetic eddy current brake 47. The speed of the meter is regulated by a resistance 45. The arms 34, 38 are provided with terminals 35, 36, 37 and when one of them gets out of phase current is supplied to a reversible motor driving a wheel 17 provided with a peg 18 gearing with arms 81 of a wheel geared to the throttle valve of the prime mover. The arm 78 controlling the amount of resistance 45 in the meter circuit is kept in a central position by the springs 80 and extends into the path of the arms 81 so that when a regulating movement takes place the arm 38 is either accelerated or retarded with respect to the arm 34. To obtain an equal regulating step in each position of the valve 2, the arms 81 are unequally spaced around the circumference of the wheel 19.
Patent GB-391979-A (GB)
Title: Improvements in or relating to thermionic and like valve circuits
IPC: H03D1/16
Filed: 1932-05-13
Abstract: 391,979. Valve circuits for wireless reception. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Marconi House, Strand, London.-(Radio Corporation of America ; 570, Lexington Avenue, 51st Street, New York, U.S.A.) May 13, 1932, No. 13853. [Class 40 (v).] In a combined detector and amplifier utilizing a valve of ordinary construction having two or more grids, the high-frequency potentials are applied to the cathode C and anode P, in such a way that these electrodes act as a diode detector, and the rectified voltage is applied to the grid G1, amplified low-frequency energy being taken from the grid G2. When a pentode is used, the middle grid may act as the amplifier input electrode, the innermost grid acting as a space-charge grid, Fig. 2 (not shown), or the innermost grid may act as the amplifier input electrode, the middle electrode being at a fixed potential, Fig. 3 (not shown).
Patent GB-200647-A (GB)
Title: Improvements in light projectors especially suitable for use upon vehicles
IPC: F21V7/00
Filed: 1922-05-17
Abstract: 200,647. Ryland, H. S. May 17, 1922. Vehicle lamps.-In a vehicle lamp, the source of light is placed at the focus f<1> of an elliptical reflector a and an horizontal reflector b with its centre of curvature at the focus f<1> is arranged facing the reflector a, the edges of the reflectors being contained in a plane passing through the focus f<1> and perpendicular to the principal axis. In an aperture or an extension d of said aperture in the reflector b is arranged a diverging lens or combination e so that its vertical focus coincides with the conjugate focus f<2> of the reflector a. The edges of the reflectors a, b are joined by a ring c, and the reflector a may be substituted by a corrected Maugin mirror. The lens e may be carried by a tubular extension which may be adjustable.
Patent GB-704512-A (GB)
Title: A device for making and applying sealing capsules over bottles, phials and like containers
IPC: B67B3/04
Filed: 1952-06-04
Abstract: 704,512. Shaping seating capsules. LARRIEU, H. C. June 4, 1952 [Aug. 1, 19S1], No. 14086/52. Class 100 (2). [Also in Group XVII] In apparatus for forming sealing capsules from thin material 28 and applying them to bottles or other containers 27, a frame 1, 2 carries a female die 5 provided with a central aperture, radial grooves 6 in which are resiliently mounted pawls 7, and an annular knife 9 and a vertically reciprocable plunger 3 which descends, first to allow springs 21 to lower a knife 18 co-operating with the knife 9 to cut out a disc and then to shape the capsule which is carried through the die aperture into a recess 25 in a rotary member 23 rotated to bring the capsule opposite the bottle to be sealed. As shown in Fig. 1, the plunger head 4 is ribbed and the plunger has a shoulder 10 carrying a shaping member 11 urged downwardly by a spring 12 and itself carrying on a shoulder 13 a shaping member 14, urged by a spring 15 and carrying the knife 18. The bottoms of the members 11, 14 have as many grooves 22 as there are grooves 6 in the die 5. During shaping the pawls 7 are depressed by these members against the force of a garter spring 8 to cause the capsules to be shaped gradually. In modifications, Figs. 2 and 3 (not shown), the knife 18 is carried on the member 11, the member 14 is not provided and the pawls are not pivoted but lie sloping upwardly or downwardly towards the die aperture. The pawls are slidden outwardly radially against their garter spring by depression of ,the plunger. The plunger head may be plain or may emboss the flat part of the capsule.
Patent GB-995278-A (GB)
Title: Improvements in or relating to transfer sheets and methods of use
IPC: B41L1/22
Filed: 1962-04-12
Abstract: A transfer sheet suitable for use in a thermographic copying process comprises a flexible base bearing a substantially continuous coating which softens and becomes tacky without melting to a liquid over a temperature range of several degrees in excess of 100 DEG C. and comprises a binder having a broad fusing and melting range and infra-red absorbing and optically and magnetically detectable colouring material, whereby images transferred to a master sheet from the transfer sheet gradually soften and become tacky without melting to a liquid under the influence of infra-red radiation and adhere to a copy sheet placed in contact with the image areas of the master, so that on stripping the copy sheet from the master it bears an image that may be optically and magnetically scanned.  Typically the coating on the transfer sheet, which may comprise a base of paper or plastic consists of one or more waxes with polyisobutene or chlorinated rubber or other thermoplastics such as ethyl cellulose, polyvinyl butyrate or chlorinated biphenyl resins together with an oil and optionally lanolin to give a broad melting range below 250 DEG C. and black iron oxide alone or with carbon black, or iron filings or iron powder with one or more of carbon black, nigrosine or other radiation-absorbing pigments.  The master sheet which may be of polyethylene terephthalate, polythene, or polyvinyl fluoride is preferably imaged by typing with the transfer sheet coating contacting the rear of the sheet.
Patent GB-184591-A (GB)
Title: Improvements in means for driving pumping apparatus
IPC: F04B17/02
Filed: 1921-05-20
Abstract: 184,591. Stokes, D. T. May 20, 1921. Cam-actuated pumps; lever-actuated pumps; stroke, varying; rods and rod guides.-In pumps of the type actuated by a windmill 8 or the like through a cam 17 shaped to effect a slow pumping-stroke and a quick return stroke, the return stroke is ensured by the provision of a guidesurface 18 which together with the surface 17 engages a roller 14 on a lever 11, which actuates the pump-rod 3. The lever is pivoted between the bifurcated projections 9 on the framing 1 at points 10 or 10<1>, which thereby enables the pump stroke to be varied, and the arm 13 may have a guide 22. Modifications comprise the use of an axially-acting cam engaging a bell-crank lever, or the lever may be dispensed with by mounting the roller directly on the piston-rod, which is then guided between fixed slides on the pump frame, the guide-surface for the roller being provided in each case.
Patent GB-1383214-A (GB)
Title: Conveying system
IPC: B61B10/02
Filed: 1972-03-27
Abstract: 1383214 Conveyer systems FMC CORP 27 March 1972 [5 April 1971] 14223/72 Heading B7L A conveyer system comprises a trolley 10 movable from a first line formed by channels 40, 41 to a second line 91 formed by channels 88, 89 through a transfer zone; a series of spaced pusher pins 20 carried by a powered chain 12 extending adjacent the first line; a drive pawl 30 on the trolley 10 for engagement by a pin 20 to advance the trolley; and a dog 56 pivotably mounted on the trolley 10 at 72, Fig. 12, rearwardly of the pawl 30 and movable to an upright operative position, which dog 56 when locked in its operative position is engaged by a pin 20 to push the trolley through the transfer zone after the pawl 30 has disengaged from the preceding pin 20. As shown in Figs. 3, 5, 10 and 12, the sequence of operations is: a locking cam 57 pivoted to the trolley 10 at 74 rides up lifting cams 76, 77 carried by the channels 40, 41, thus locking the dog 56 in its upright position; the pawl 30 moves out of engagement with a pusher pin 20; the following pin 20 engages the dog 56; a transverse bar 50b, of a pawl-actuating bellcrank 50 pivoted to the trolley 10 at 51, rides up cam plates 84, 85 carried by the channels 88; 89 in the transfer zone so that the pawl 30 is released to pivot under gravity out of the pusher pin path; the trolley 10 is pushed on to the second line 91 until the dog 56 is moved out of engagement with the pins 20 of chain 12; the cam plates 84, 85 terminate so that bellcrank 50 pivots under gravity and pivots pawl 30 into the path of pusher pins 20 on a'chain 92 which then drives the trolley 10 along the second line 91. Normally, i.e. when outside the transfer zone and therefore not locked by cam 57, the dog 56 is deflected when contacted by a pin 20 but pivots back to its upright position due to a counterweight portion 56c.
Patent GB-716667-A (GB)
Title: Apparatus for effecting oxidation of coal
IPC: C10L9/06
Filed: 1952-06-05
Abstract: 716,667. Treating coal. SOC. DE TECHNIQUE INDUSTRIELLE. June 5, 1952 [June 5, 1951], No. 14240/52. Class 50 In a process for oxidizing fusible coals to reduce their caking power prior to low temperature distillation, a bed of the coal, which may be preheated, is fed slowly downwards through a heat-insulated vertical tower 2 whilst air, which may also be preheated, is forced by a fan 7 into the bed through spaced pipes 5, the temperature of the air and the rate of descent of the coal being controlled so that the coal bed temperature does not normally exceed 200‹ C. Shou'd local ignition of the coal occur, carbon dioxide can be injected into the bed through the pipes 5 to extinguish the fire.