baber/WOPTO huggingface dataset:
Patent GB-291170-A (GB)
Title: Improvements in loud-speakers and similarly operating acoustic apparatus
IPC: H04R11/00
Filed: 1927-03-04
Abstract: 291,170. Menkens, C. March 4, 1927. Magnetic instruments.-The vibrator or reed of a loud-speaker or similar unit comprises two or more resilient but untensioned wires rigidly secured at each end, and carrying at the centre an armature of soft iron or suitable magnetic alloy. As shown in Figs. 2 and 3, the soft iron armature 2 is clamped or welded to springy steel or bronze wires 1 which are themselves clamped at their ends to standards 6. The armature lies adjacent the gap between two pole-pieces 8 carried by a U-shaped permanent magnet, and is connected to the acoustic diaphragm by a rod 3. The wires 1 may form a continuous loop, and may be inserted in slots in the side faces' or the upper face of the armature 2. One wire 1 may be thicker than the other, and the rod 3 may be attached nearer to the thinner wire. Fig. 6 shows an armature of T-s,ection, with three supporting wires 1, and with the pole-pieces 8 bevelled. The diaphragm rod 3 may be secured to a separate clip placed at one side of the armature 2. An additional pair of arms 1 may be provided to form a cross-shaped support for the armature 2, as shown in Fig. 7. According to the Provisional Specification, the armature may be mounted on a single wire which is put under torsional strain bv the armature vibrations. The reed may be clamped at one end only, with the armature at the free end; or it may be composed of spring steel band. An armature carried at the free end of a spiral spring is also referred to.
Patent GB-342922-A (GB)
Title: Improvements in machines for grinding spline shafts
IPC: B24B53/075
Filed: 1930-02-25
Abstract: 342,922. Grinding. CHURCHILL MACHINE TOOL CO., Ltd., Broadheath, near Manchester, and ASBRIDGE, H. H., Claremont, Washway Road, Ashton-on- Mersey. Feb. 25, 1930, No. 6205. [Class 60.] Trueing rotating tools. - In a machine for grinding spline shafts, means are provided for trueing the concave profile of the wheel employed for grinding the space between the splines, without necessitating removal of the work. The work c is supported at one end by a centre b on a tailstock a and coaxial with the centre, and in a bearing d, is a spindle e carrying a trueing diamond holder f adapted to be oscillated with the spindle e. The diamond is set to the required position by the use of a gauge h, which is passed on to the spindle, the grinding-wheel g is traversed to engage the diamond, and the diamond is oscillated to true the wheel whilst rotating. The trueing-device may be mounted on the rear end of the tailstock spindle, instead of in the bearing d.
Patent GB-419136-A (GB)
Title: Improvements in apparatus for medical treatment with electrical oscillations of very high frequency
IPC: A61N1/40
Filed: 1933-03-01
Abstract: 419,136. Generating high-frequency oscillations. SIEMENS & HALSKE AKT.- GES., Siemensstadt, Berlin. March 1, 1933, No. 6278. Convention date, March 30, 1932. [Class 40 (v).] An apparatus for medical treatment with electric oscillations comprises a generator circuit generating oscillations of over 10<7> periods per second, a treatment circuit and a separate closed electric oscillation circuit between the generator and treatment circuits. The construction illustrated consists of a generator circuit 2 in a housing 1, an intermediate circuit 6 consisting of inductances 7 and 8 and a variable condenser 9 and a treatment circuit consisting of an inductance 5, a tuning condenser 4 and a treatment condenser 3. Specification 390,247 is referred to. The Specification as open to inspection under Sect. 91 comprises also the use of a non- syntonizing intermediate circuit which preferably has a natural wave length situated within the frequency range employed. The non-syntonizing circuit may consist of two resistances, e.g. self-inductances, one of which is coupled to the generator circuit and the other to the treatment circuit, inductively, galvanically or capacitatively, and of two parallel wires, the length of which may be variable. The parallel wires are preferably telescopic wires. This subject-matter does not appear in the Specification as accepted but is the subject-matter of Specification 420,805.
Patent GB-496573-A (GB)
Title: Improvements relating to draughting machines
IPC: B43L13/08
Filed: 1937-03-04
Abstract: 496,573. Draughting-machines. NAYLOR, J. W., and HALDEN & CO., Ltd., J. March 4, 1937, No. 6397. [Class 97 (iii)] The initial rotation of a knob 33a de-clutches a rotatable carrier 23 for a straight edge 44 from a non-rotating head 10 which is connected by parallel movement linkage to the edge of the drawing board, and subsequent rotation causes the carrier 23 to move with the knob to the desired new setting. As shown a dial plate 18 carrying a notched ring 21 has a central upstanding cone 17 which is adjustably clamped on the coned base 12 of a boss 11 on the head 10 by the coned lower end of a clamping sleeve 26. Operation of the latter is effected through a bush 27 by a pin 28 in threaded engagement with the boss 11. A sleeve 30 fixed to the knob 33a is mounted by ball bearings 25 on the clamping sleeve 26 and is surrounded by an upstanding sleeve 24 on the carrier 23. Three tongues 34 projecting from the bottom of the sleeve 30 have outer cam faces 36, 37, adapted to co-operate with the cam faces 43 of shoulders 41 on three clutch members 38. The latter are mounted to slide radially in the carrier 23, are urged towards the centre by springs 40, and each carry two teeth 42 to engage the notches in the ring 21. In operation rotation of the knob 33a first causes the cam faces 37 to engage the tapered ends of the shoulders 41 and move the clutch members 38 radially outwards, thus withdrawing the teeth 42 from the notches in the ring 21. Upon further rotation of the knob 33a the cam faces 36 engage the flat central portions 43 of the shoulders 41 and couple the sleeve 30 to the carrier 23. If the movement of the carrier 23 is obstructed the tongues 34 move the clutch members out further causing them to bind against the upstanding flange of the dial plate 18. The straight edges 44 are fixed to a plate 45 which is adjustably anchored to the carrier 23 by a threaded tie bar.
Patent GB-213555-A (GB)
Title: Method and apparatus for the turning-over of the rims of tin vessels
IPC: B21D51/32
Filed: 1924-03-13
Abstract: 213,555. Schuler Akt.-Ges., L. March 31, 1923, [Convention date]. Beading.-The rim of a pail or other sheet metal vessel is beaded by first forming a preliminary bead d, which is rolled in without alteration of its shape as shown at c in a subsequent operation, so as to avoid incurvations due to extension due to stress in working and so as to obtain a smooth bead. The preliminary bead is formed by a roll I, and the final bead, in the case of thin sheet metal, is completed by a roll II. In the case of stronger sheet metal a further operation by a roll III is required to bring the bead d into contact with the body of the vessel. The rolls have grooves at each end so that one may be used when the other is worn out.
Patent GB-572921-A (GB)
Title: Improvements relating to automatic guns
IPC: F41A7/04
Filed: 1942-05-13
Abstract: 572,921. Automatic guns. ROE & CO., Ltd., A. V., and BEARDSHALL, G. May 13, 1942, No. 6498. [Class 92 (ii)] Relates to power-operated cocking devices for machine guns in which liquid pressure from a pipe j, Fig. 4, is applied to a piston-andcylinder device, the plunger k of which acts upon the cocking knob of the gun. According to the invention, pressure generated by a hydraulic pump x, for example of the rotary eccentric type, is applied to the pipe j through a passage i, Fig. 2, fitted with an automatic plunger valve o loaded by a spring-lever device p. The arrangement is such that the lever device can occupy two positions : (1) as shown with the valve closed and loaded against the pump delivery pressure, and (2) when a roller s on the lever passes over a fixed projection t to the position shown in dotted lines by the action of the excess pressure in the pipe i on the valve o. The liquid under pressure then escapes to the suction side of the pump through a passage u, and the lever must be returned by hand for the next cocking operation. Specification 546,859 is referred to.
Patent GB-116250-A (GB)
Title: Improvements in or relating Appliances used in the Manufacture of Tin-plates or Sheets and other like Metal Coated Plates or Sheets.
Inventor: DAVIES DAVID
IPC: C23C2/00
Filed: 1917-05-02
Abstract: 116,250. Davies, D., and Jones, D. May 2, 1917. Sand-blast.-In a plant for continuously annealing, sandblasting, pickling, washing, and coating metal plates, the plates pass to sand-blasting apparatus 55, through which they are carried by disk rollers 53, the chamber 55 having also inlet and delivery rolls 50, 51 with air-excluding shutters 52.
Patent GB-678145-A (GB)
Title: Improvements in gas turbine driven vehicles for road or rail with mechanical or hydro-mechanical transmission
IPC: B60K3/04
Filed: 1951-03-19
Abstract: 678,145. Gas turbines. REGIE NATIONALE DES USINES RENAULT. March 19, 1951 [May 24, 1950], No. 6571/51. Class 110(iii) [Also in Group XXXI] In a gas-turbine driven road or rail vehicle embodying a mechanical or hydromechanical transmission and mechanical reverse, a system of braking is provided between the turbine and the reversing gear, whereby the turbine may be braked during reversing or gear-changing. As shown in Fig. 2 the arrangement includes a control lever 1 which actuates the reversing lever 3 with some lost motion between stops 4 and 5. Upon preliminary movement of lever 1, the cam 6 moves lever 7 to close contact 9 of the electric valve 10 of the turbine brake. In Fig. 3 the reversing lever 11 and brake lever 12 have interlocking notched discs 13, 14 attached thereto so that the brake must be applied before the reversing lever can be moved.
Patent GB-429825-A (GB)
Title: Improvements in explosion-proof lamps
IPC: F21V25/06
Filed: 1935-03-02
Abstract: 429,825. Explosion - proof lamps. SIEMENS - SCHUCKERTWERKE AKT.- GES., Siemensstadt, Berlin. March 2, 1935, No. 6611. Convention date, March 2, 1934. Addition to 392,428. [Class 75 (iv)] In an electric lamp in which an explosionhindering gas is introduced into the casing by means of a capsule adapted to be opened by means operable from outside the casing, as described in the parent Specification, the capsule is carried in a cage which is readily insertable into and withdrawable from the casing. The empty capsule may be removed by means of a simple hook engaging the cage. In the form shown, the cage is formed by means of a pair of springy arms e having a cross-piece secured at f to the screw stopper c, and connected together by a cap g which locates the neck of the capsule d. The arms e are slightly curved in crosssection and they may be formed from the limbs of a U-shaped flat metal member. The cap g is provided with a central aperture aligned with the piercing needle h of the nozzle.
Patent GB-634302-A (GB)
Title: Improvements in or relating to carburetters
IPC: F02M7/22
Filed: 1946-03-04
Abstract: 634,302. Spray carburetters. DAVIES, L. March 4, 1946, No. 6658. [Class 7 (iii)] In a carburetter having one or more paddle wheels 6 mixing the air and fuel spray, the fuel is sprayed into an atomizing chamber 8 containing a paddle wheel 14, and the atomized fuel enters the carburetter mixing chamber through pipes 1 and 50. A fuel tank 12, Fig. 2 is connected by a pipe 38b, having a non-return valve 38a and control valve 37a, to a compresser cylinder 13, the pressure in the tank 12 being measured by a gauge 37. The fuel delivery pipe 11 from tank 12 to a spray nozzle 10 in the chamber 8 has a cock 27 controlled conjointly by a rod 24 with a throttle valve 29 and an air control valve 5. A weighted flap valve 4 and an adjustable spring loaded valve 20 also control the air intake and air filtering screens are provided between the flanges 32, 34 and 35, 36. The pressure pipe 38 is connected through a non-return valve 53 to the chamber 8 to assist in rotating the wheel 14 and ait enters the chamber 8 through a pipe 49. In a modifi. cation the fuel from tank 12 flows to a float chamber fixed to the side of chamber 8 and is delivered to the top of this chamber, the pipe 38 having a branch connected to the fuel pipe leading from the float  chamber to the chamber 8.
Patent GB-1463824-A (GB)
Title: Liquid crystal display device
IPC: G04G9/06
Filed: 1974-02-13
Abstract: 1463824 Electronic watches SUNCRUX RESEARCH OFFICE KK 13 Feb 1974 [19 Dec 1973] 6659/74 Heading G3T [Also in Division G5] A drive circuit for a multi-element liquid crystal display device 3 comprises pulse generating means providing a group of three different drive signals VCom on terminals 8, 9, 10 and a group of two different drive signals VSeg on terminals 11, 12 and switching means 6, 7 operated by control pulse signals to select one drive signal from each group for application to the electrodes 4, 5 of each display element 1, the drive signals being such that the element is switched on or off. Using out of phase pulses shown in Fig. 8 three signals with an RMS value ¥VP and “VP are obtained across the elements to turn them on or off respectively. Alternatively the pulses have a length <SP>1</SP>/ 3  the period one of the signals having half the frequency of the others Figs. 11, 12 (not shown). In another embodiment VCom is a h.f. signal which turns the elements off. The signals are generated by a 4 stage Johnson counter (17) Fig. 7 (not shown); switching devices 6, 7 are electrical or mechanical; the circuitry may be part of a large scale integrated circuit. The apparatus may form part of a watch with segment electrodes 5 forming minute indicators arranged in a circle, and every seventh electrode inter-connected to form 6 groups. A common electrode 4 is arranged opposite each set of 6 adjacent electrodes 5. The cells are turned on sequentially one-by-one until all are on.
Patent GB-1302924-A (GB)
IPC: G06G7/28
Filed: 1970-02-11
Abstract: 1302924 Automatic control SIEMENS A G 11 Feb 1970 [12 Feb 1969] 6697/70 Heading G3R The gain of a closed loop servo control system is automatically varied inversely in dependence on a signal representative of speed and/or acceleration of a servomotor forming part of an internal feedback loop. In Fig.3, electrical signals from a gyro 25 responsive to the angle of roll of a ship are amplified at 24 and, when a switch 19 is closed, serve to set the datum of a control amplifier 8 responsive to signals # from a rate of roll gyro 16. Output from amplifier 8 is effective through a variable gain device 9 and a squarelaw amplifier 5 to set the datum of a control amplifier 14 responsive to signals n from a tachometer generator 15 driven by an electric motor 2. Output from amplifier 14, limited at 4, 4, is effective to set the datum of a control amplifier 3 responsive to signals i dependent on motor armature current. As a result motor 2 is controlled to operate in the appropriate direction to counteract roll by moving a truck 13 towards one side or the other of the ship. The rate of roll signals are applied through a differentiator 18 to add an acceleration component of control. The gain of device 9 is automatically reduced in dependence on the square root of the amplitude of roll acceleration by applying the acceleration signals through a peak rectifier 10 and function generator 23. Application to amplifier 5 of signals dependent on the position of truck 13 instead of roll acceleration is referred to. Roll stabilization by controlling the movement of water between tanks on the ship or controlling the angle of stabilizing fins is referred to. Application to the automatic control of fluid-flow or pressure is also referred to.
Patent GB-859942-A (GB)
Title: Improvements relating to electrical phase shift networks
Inventor: WHITE ERIC LAWRENCE CASLING
IPC: H03H11/18
Filed: 1956-03-03
Abstract: 859,942. Impedance networks. ELECTRIC & MUSICAL INDUSTRIES Ltd. March 4, 1957 [March 3, 1956], No. 6735/56. Class 40(8). [Also in Group XXXVI] Quadrature addition of two signals is effected by shifting the phase of one of them by 90 degrees and feeding them to a summing amplifier, the phase relation between the signals being preserved over a broad band of frequencies. As shown in Fig. 1, modulated signals y, x of amplitudes Ey and Ex are fed respectively to terminals 1 and 2. The signal y is applied through resistor 4 to a Blumlein integrator 3 having a feedback capacitor 5 and thence through a resistor 6 to a summing amplifier 7 having a feedback resistor 8. The signal y is also fed to the amplifier 7 through a capacitor 9 and the signal x is applied to the amplifier through a resistor 10. The output E 1  from the integrator leads the input by almost 90 degrees so that E 1  = jEy/Z where Z = w/wo is the normalized frequency, w o  is the nominal carrier frequency and W 0  C 1  R 1  = 1. Because of the feedback via resistor 8, the input impedance of the amplifier 7 is very low and the input point is a virtual earth. The three inputs are summed by the amplifier and the output is shown to be:- The quadrature term may be made independent of frequency by choosing the minimum of the bracketed expression to occur at Z = 1. Putting R 4 /R 3  = 1 and making R 4 /R 2  =¢ gives and when Z = 1, Eo = Ex + jEy as required. The network of Fig. 2 is a modification of that of Fig. 1, the integrator being replaced by a transformer 11 and resistors 12, 13, 14, the capacitor 17 corresponding to the capacitor 9. In the modification of Fig. 3, both signals are shifted in phase, phase variations due to frequency changes in one path being compensated by equal changes in the other path. Both signals are fed to transformers, respectively 20, 21, whose secondaries are centre-tapped to earth. Resisttance capacity networks connected across the outputs of the transformers produce a phase advance of 45 degrees of one signal and a retardation of 45 degrees of the other signal at the angular frequency wo. The transfer ratios of the two paths are equal but the phase-shifts move in the same direction by equal amounts to a first order, thus keeping a phase difference of 90 degrees within range of Œ 10% of wo. The signals are fed through cathode-follower amplifiers and equal resistances 31, 32 to a summing amplifier provided with a feedback resistor 34.
Patent GB-992849-A (GB)
Title: Apparatus for dispensing paper towels
Inventor: THOMASMA JOHN CORNELIUS
IPC: A47K10/16
Filed: 1962-02-21
Abstract: 992,849. Feeding sheets. SANITOR MFG. CO. Feb. 21, 1962, No. 6747/62. Heading B6B. A paper towel dispenser comprises hangers 47, 48 upon which are hung a pack of sheets 15, slots 17, 18 in each sheet being engaged by the inner edges of the hangers. The sheets are partially dispensed by a reciprocable system comprising a slider 73 attached to a resilient strip 81 and a return spring 75 (not shown). The strip 81 first bends inwardly when a knob 65 is depressed to contact the outermost sheet by means of a soft rubber end portion 61 and then moves downwardly, taking the sheet with it (see Fig. 11). During this downward movement, portions 27, 28 of the sheet are constrained to curl between the hangers 47, 48 to the position shown in Fig. 13, sufficient friction existing between the hangers and portions 27, 28 to retain the sheet before it is withdrawn by hand. The sheets 15 are preferably as described in Specification 992,850. The slots 17, 18 are positioned nearer one end of the sheet than the other and their length, angular disposition and width are determined by the quality of paper used. The hangers are also angularly disposed (see Fig. 6) and preferably are inclined at a slightly greater angle to the top edge of the dispenser than the slots 17, 18 to aid the initial curling of the portions 27, 28. A friction plate of soft rubber or a suitable friction causing surface may be applied to the inside surface of the rear wall of the dispenser to prevent the dispensing of more than one sheet at a time, particularly when few sheets remain. Also, when sheets of lightweight material are used a spring arm 88 (not shown) depending from the inside of the front cover of the dispenser may bear upon the outermost sheet to prevent its falling out after partial dispensing thereof.
Patent GB-541330-A (GB)
Title: Improvements in and relating to photographic layers, and the manufacture of dyes and intermediates for use therein
IPC: G03C1/83
Filed: 1940-04-15
Abstract: 541,330. Cyanine dyes : oxazole derivatives; photographic sensitizers. KODAK, Ltd., HAMER, F. M., and RATHBONE, R. J. April 15, 1940, No. 6782. Drawings to Specification. [Class 2 (iii)] [Also in Group XX] Carbocyanine and styryl dyestuffs are prepared by condensing a quaternary ammonium salt of an oxazoline, not having the oxazoline ring fused to another nucleus but having a methyl group in the 2-position with a quaternary ammonium salt of a heterocyclic nitrogen compound having a #-amino vinyl or a substituted #-aminovinyl group in the α-or γ-position or with an aromatic aldehyde, respectively. The dyestuffs are used in photography. e.g. in silver halide layers and light filters. In examples : (1) 2-methyloxazolinemethiodide, prepared from the oxyazoline and methyliodide, is condensed with p-dimethylaminobenzaldehyde in the presence of pyridine and alcohol: (2) 2-methyl-oxazoline ethiodide (or methiodide) is condensed with 2-w-acetanilidovinylbenzoxazoleethiodide in the presence of triethylamine. The use of quaternary ammonium salts of benzthiazole, benzselenaxole, indolenine, quinoline, oxazoline, thiazine and dihydro 1:3 thiazine is mentioned. Specifications 344,409, 354,898 and 385,320 are referred to. The Provisional Specification describes the condensation of the quaternary ammonium salts of 2-methyloxazoline with a quaternary salt containing a re-active alkylthiol group to give methine cyanine dyes.
Patent GB-1204954-A (GB)
Title: Mechanical classifier
IPC: B03B5/62
Filed: 1968-02-12
Abstract: 1,204,954. Wet separation. OSTERREICHISCH-AMERIKANISCHE MAGNESK A.G. 12 Feb., 1968 [9 March, 1967], No. 6849/68. Heading B2H. A classifier for separating a pulp into coarsegrained sinks and an overflow containing fines comprises a trough 3 having an inclined bottom, an inlet 1 for the pulp, a weir 2 for fines overflow, a conveyor 4 for conveying the sinks to an outlet 6 at the upper end of the trough and one or more transverse rows of water inlet openings 10 in the trough bottom. The openings may be constituted by openings of separate pipes 7, as shown, or of screen or perforated plate apertures. The openings in adjacent rows are preferably staggered. To prevent clogging of the water inlets with sinks in response to a reduction in pressure, and to prevent wear of the trough bottom, the latter is lined at least in the region of the inlet openings 10 with elastic material 8, e.g. rubber, which has incisions 9 cut therein over the openings 10 to act as a non-return valve for water admission. The water admitted through the openings produce turbulent and upflow zones in the pulp preventing hindered settling of the sinks and adherence of the fines to the sinks.