baber/WOPTO huggingface dataset:
Patent GB-790887-A (GB)
Title: Improvements in and relating to acoustic horns
IPC: H04R1/28
Filed: 1956-03-13
Abstract: 790,887. Acoustic horns. GENERAL ELECTRIC CO. March 13, 1956 [March 14, 1955], No. 7828/56. Class 13. [Also in Groups XXXIX and XL (b)] A folded acoustical horn is loaded with acoustical resistive material so that it appears from the throat end to be terminated in its characteristic impedance. In the embodiments described the horn is folded inside a cabinet and is coupled to the rear side of the diaphragm of a direct, radiator loud-speaker so that low-frequency output is from the horn and high-frequency output directly from the front side of the diaphragm. As shown, bodies 25, 26 of fibre padding, burlap, rags or other sound-absorbing material are placed in the horn, of which bodies 25 provide a resistive termination approximately equal to the characteristic impedance, .and 25, 26 together attenuate the high-frequency components approximately 6 db. per octave to overcome the tendency of the resistance loaded horn to increase its output 6 db. per octave as the frequency increases. In order to avoid fluctuations in the response at high-frequencies which would otherwise be caused due to interference between the front radiation of the speaker 21 and the sound issuing from the horn, resistive material is. placed in at least two regions along the horn so that the horn behaves as a sharp cut-off acoustic filter with a high-frequency cut-off just below the frequency at which the length of the horn is one wavelength. The amounts of resistive material and their positions are determined by impedance or frequency response measurements. The criteria for matching the impedance of the horn to that of the diaphragm are discussed in the Specification which also includes dimensions for horns suitable for use with commercially available loud-speakers.
Patent GB-664749-A (GB)
Title: Improvements in or relating to liquid atomisers
IPC: F23D11/10
Filed: 1947-11-12
Abstract: 664,749. Spray-producers. FRASER, R. P. Nov. 12,1947, No. 7839/50. Divided out of 664,676. Class 69 (iii) [Also in Group XI] In a liquid fuel burner having a terminal cap 19 and a removable unit assembly comprising a central spray member 1 held by a central plug 7 inside an encircling body 14 provided with an annular cavity 22 and a cap 20 having tangential holes 21 for whirling air, steam or gaseous fluid and delivering it as a conically converging stream through an annular orifice 221 surrounding the liquid spray from an orifice 4, the rear surface of the unit is dome shaped to take up a closed line seating with a forwardly diverging mouth 15 of a tubular liquid supply member 13 when held there against by the pressure exerted on its front face by screwing a terminal cap 19 onto member 13. Shims 201 of varying thickness, or alternatively a spring, are placed between the shoulder 14<SP>1</SP> of member 14 and the end cap 20 to vary the width of the annular conical passage 22<SP>1</SP>. Air, steam or gaseous fluid is supplied to the annular chamber formed between caps 19, 20 through holes 17 formed in member 13. Specifications 536,224 and 664,676, [both in Group XI], are referred to.
Patent GB-798162-A (GB)
Title: Improvements in or relating to apparatus for producing hollow cores for foundry purposes
IPC: B22C23/00
Filed: 1954-06-16
Abstract: 798,162. Core-making machines. POLYGRAM CASTING CO., Ltd. June 16, 1954 [June 17, 1953], No. 7864/58. Divided out of 798,161. Drawings to Specification. Class 83 (1). [Also in Group XXX] The subject-matter of the Specification is identical with that described in Specification 798,161, which is referred to, but the claims are directed to the core-blowing machine. Specification 674,422 also is referred to.
Patent GB-590721-A (GB)
Title: Improvements in or relating to locks and latches
IPC: E05B9/08
Filed: 1945-03-29
Abstract: 590,721. Fastenings. PARKES & SONS, Ltd., J., FRYER, E. C., and BUTTER, F..J. March 29, 1945, No. 7903. [Class 44] Locks or latches are formed with a flange carrying screw clamps for attachment to a door or window formed of metal, or having a metal or other plate on one or each side, or having undercut recesses in one of its faces. The luck A has a rear flange E extending over a plate C, forming with plates C<1> and section bars D a built-up door B. Two clamps F, consisting of short metal bars and located a short distance from the rear wall a of the lock, are pivotally connected to the flange and extend far enough to overlap the inner face of the plate T ; each one has at its inner end a shallow rib f extending towards the flange E and of a depth about equal to the thickness of the plate C, and each has a tapped hole f<1> for a headed screw G passing through a hole in the flange E. The inner end g of the screw is burred over to prevent its removal. On the front of the lock there is a shallow round projection H, which fits into a corresponding hole in the door plate C<1>. Two sheaths, which house the latch and lock bolt heads, project from the fore end of the lock and pass, when the lock is in position, through corresponding holes in the front section bar D, thus securing the front end of the lock. The plate C is recessed to allow for the insertion of the lock ; this recess extends back beyond the rear wall a but not so far as the flange E which thus conceals it. Before the lock is inserted the handles are fitted to it, and the screws G are unscrewed until the burred ends g lock up against the clamps and by a further twist the clamps are turned up against the rear wall a, being rounded at f to allow movement through a right angle.
Patent GB-911031-A (GB)
Title: Adjustable splined connection, particularly for a pinion
IPC: H02K15/085
Filed: 1961-03-06
Abstract: 911,031. Winding dynamo-electric machines. FORT WAYNE TOOL & DIE Inc. March 6, 1961 [Dec. 14, 1960], No. 8078/61. Class 35. [Also in Group XXIV] Stator winding apparatus comprises a driving shaft 18 connected through crank linkage 22 to a shaft 14 splined for reciprocation through a gear 42, two wires 16 being fed through the shaft to needles 12 dispensing the wire into the slots of an internally slotted dynamo-electric machine stator core member (not shown), a cam drum 28 fast on the driving shaft having a groove 30 engaged by a follower on a lever pivoting at 36 and connected to a rack 40 meshing the gear 42 which is accordingly oscillated back and forth together with the splined shaft 14 as the latter reciprocates. The gear 42 is so constructed that it may be adjusted to take up backlash caused by wear &c. in its spline connection with the shaft 14 (see Group XXIV).
Patent GB-1255843-A (GB)
Title: Improvements in or relating to circuit arrangements for the series operation of thyristors
Inventor: BOSSI HANS JURG
IPC: H02M1/088
Filed: 1969-02-14
Abstract: 1,255,843. Static rectifiers. BROWN, BOVERI & CO. Ltd. 14 Feb., 1969 [16 Feb., 1968], No. 8142/69. Heading H2F. A thyristor chain comprises a plurality of thyristor groups each group as shown, Fig. 3, comprising series thyristors Th each shunted by respective avalanche diodes ASD and inductors L, L<SP>1</SP> which may be saturable and have equal inductance; each inductor being shunted by a bridging diode D, D<SP>1</SP> in series with damping resistors R, R<SP>1</SP> respectively; and each whole group is shunted by a capacitor C 1 . The capacitors C 1  limit the rate of positive and static reverse voltages rise (dV/dt) on the individual rectifiers and ensure symmetrical dV/dt distribution over the groups. The reverse voltage is of course also limited by the avalanche diodes. The chokes limit the dynamic voltage peaks during ignition and extinction. C 2  and C 3  represent stray capacitances to earth. In the event of positive voltage transients in the supply voltage at a time when the thyristors are passing current, the charging currents for C 2,  C 3  will flow via the terminal b-side bridging diode D<SP>1</SP> and the a-side choke L will become effective. During negative voltage transients the discharge current will flow via the α-side diode D and only the choke L<SP>1</SP> will become effective. The damping resistors R, R<SP>1</SP> supplement the resistance of the diodes D, D<SP>1</SP> in the forward direction and serve to prevent reverse magnetization of the inductors, if saturable. The avalanche diodes may be omitted and their function taken over by the thyristors.
Patent GB-970553-A (GB)
Title: Spectrochemical light sources
Inventor: SZYMCZAK ANTONI
IPC: G01N21/67
Filed: 1962-03-02
Abstract: 970,553. Charging and discharging condensers. HILGER & WATTS Ltd. March 1, 1963 [March 2, 1962], No. 8186/62. Heading H2H. An analytical spark gap apparatus comprises a storage device, such as a capacitor C1, chargeable from an alternating current source over a rectifier MR1, the storage device C1 being discharged in an oscillatory manner by means including two asymmetrical switching devices V1, V2 connected in reverse parallel. The energy for the discharge across the analytical gap may be derived from a low voltage supply in which case the capacitor discharge is used to ionize the gap or alternatively the capacitor discharge itself may provide the gap discharge energy. The switching device V1 is of the triggered type such as a thyratron or a controlled semi-conductor rectifier and is triggered by a pulse generator PG whilst the device V2 may be a similar type or alternatively a semi-conductor diode (Fig. 3, not shown).
Patent GB-217664-A (GB)
Title: Improvements in or relating to the construction of bridges
IPC: E01D2/02
Filed: 1923-03-23
Abstract: 217,664. Remfry, D. H. March 23, 1923. Bridges. - Relates to bridges of the type comprising two or more main girders and a floor system consisting of a series of cross girders connected to the main girders and longitudinal stringers for supporting the deck plating. According to the invention, provision is purposely made whereby part of the longitudinal stresses which are usually assumed to be carried by the main girders are transferred to the deck system, while at the same time lateral bending of the cross girders 2 is prevented from becoming excessive. Fig. 5 shows the form of lateral bending which would occur if the deck system were forced to take part of the longitudinal stresses without adequate precaution. To prevent this distortion, the end bays of continuous longitudinal lengths of the deck system are reinforced by diagonal members 9, 9<a>, 9b connecting the stringers to the main girders, and the cross girders and stringers are made of the same depth and joined by covering plates 11 and 12, as shown in Fig. 10. In affect, these end bays are converted into relatively deep stiff horizontal trusses, which may be braced by deck plating, slabs, &c. above and below to form box girders.
Patent GB-1041361-A (GB)
Title: Detergent composition
Inventor: TUNE JOHN BARRY
IPC: C11D3/39
Filed: 1962-03-02
Abstract: A solid saponaceous low-temperature bleaching detergent composition comprises (a) a per compound containing hydrogen peroxide of crystallization, particularly alkali metal percarbonates, perpyrophosphates, persilicates and especially perborates, and (b) either (i) a reactive ester of the type described in Specification 836,988, preferably sodium p-acetoxybenzene sulphonate, or (ii) a reactive amide of the type described in Specification 855,735, especially tetraacetyl methylenediamine or N,N-diacetyl-p-toluidide, the composition having a pH below 9.5, preferably below 19.2, as a 0.6% aqueous solution at 20 DEG  C.  The soap is suitably a sodium soap derived from a fat charge comprising 59% tallow, 26% nut oil and 15% soft oil.  The composition may also contain sodium carbonate, silicate, pyrophosphate, tripolyphosphate and carboxymethylcellulose, borax, optical bleach, perfume, germicide and lather improvers.ALSO:A solid saponaceous low temperature bleaching composition comprises (a) a per compound containing hydrogen peroxide of crystallization, particularly alkali metal percarbonates, perpyrophosphates, persilicates and especially perborates, and (b) either (i) a reactive ester of the type described in Specification 836,988, preferably sodium p-acetoxybenzene sulphonate, or (ii) a reactive amide of the type described in Specification 855,735, especially tetraacetyl methylene diamine or N, N-diacetyl-p-toluidide, the composition having a pH below 9.5, preferably below 9.2, as a 0.6% aqueous solution at 20 DEG C.  The composition may also contain sodium carbonate, silicate, pyroor tripoly-phosphate, and carboxymethylcellulose, borax, optical bleach, perfume, germicides and lather improvers.
Patent GB-252500-A (GB)
Title: The manufacture of metallic xanthates
IPC: C07C329/00
Filed: 1925-03-27
Abstract: 252,500. British Dyestuffs Corporation, Ltd., Cronshaw, C. J. T., and Naunton, W. J. S. March 27, 1925. Xanthates. - Insoluble salts of xanthic acids derived from ethyl or higher alcohols are obtained by first preparing the crude alkali xanthate in the manner described below, and then, after neutralizing, precipitating with a salt of the metal in question. The alkali xanthate is prepared by treating aqueous caustic alkali with the alcohol (methylated spirit, or, in the case of the higher alcohols, a constant-boiling mixture of the alcohol and water) and carbon disulphide. The caustic alkali may be dissolved in half its weight of water and added slowly to a wellagitated mixture of the alcohol and carbon disulphide. It is unnecessary to keep the temperature below a definite point. Specification 174,915 is referred to.
Patent GB-579500-A (GB)
Title: Improved means for controlling the concentration of dispersions or solutions
IPC: G01N9/04
Filed: 1944-05-04
Abstract: 579,500. Fluid-pressure servomotorcontrol systems. COPPEE CO. (GREAT BRITAIN), Ltd., and MOSTART, G. May 4, 1944, No. 8456. [Class 135] [Also in Group XXXV] An apparatus for controlling flowing concentrations of dispersions or solutions of solids in liquids, such as aqueous suspensions of coal or ore, and dispersions of non-miscible liquids and solutions of miscible liquids of different specific. gravity, described as applied to coal slurry, comprises the weighing of a portion of the fluid while static. A weighing pipe 7 having a valve 8 may be actuated to stop the flow of a portion of the slurry from a tank 5 after which a valve 10 opens so that the weight of the static column is measured by a pressure gauge 11. If the concentration is outside predetermined limits, the pressure gauge pointer controls pneumatic or other means to operate either a pump or valve 15 to add diluent or means to increase the concentration of the dispersion in the basin 1. A pump 3 carries the slurry from the basin to the tank 5 where most of it passes by a pipe 6 to a separator. The valves 8, 10 may be automatically operated at predetermined intervals.
Patent GB-421430-A (GB)
Title: Improvements in or relating to chairs
IPC: A47C1/032
Filed: 1934-03-17
Abstract: 421,430. Convertible chairs. DUCROT, A., 5, Rue des Colonnes du Trone, Paris. March 17, 1934, No. 8466. Convention date, Oct. 24, 1933. [Class 52 (ii)] An arm-chair convertible into a reclining chair comprises a fixed frame, and three interconnected members 5, 6, 7, the inter. mediate member 6 forming the seat when the chair is extended but being housed behind the back member 5 when the front or extension member 7 is pushed in, the latter then forming the seat of the chair. The rear part of the intermediate member 6 is supported by rollers 14, running in guide rails 15 curving upwardly towards the rear, while the front part is supported by rollers 16 running in rails 17 sloping slightly downward to the rear. The back 5 is pivoted at 8, and its lower end is connected to the rear part of the member 6 by pivoted links 9. The front member 7 is connected to the member 6 by arms 18 pivoted about the axes of the rollers 16, and is supported at its front when in closed position by a cross member 2<a> of the frame.
Patent GB-585457-A (GB)
Title: Improvements in or relating to electron discharge devices
IPC: H01J21/36
Filed: 1942-06-19
Abstract: 585,457. Thermionic valves. STANDARD TELEPHONES & CABLES, Ltd., FOSTER, J., and FORD, G. E. June 19, 1942,.No. 8476. [Classes 39 (i), 40 (iii) and 40 (v)] [Also in Group XXXVI] In a valve of the type in which the grid 3, Fig. 1, is connected to a screening disc which passes through the wall of the envelope, there is provided within the-envelope a capacitative feedback path, additional to their capacity, between the cathode 2 and the anode 1, for example by a plate 9 adjacent the anode and connected to the cathode by a broad strip 10 of low inductance passing through the aperture in the screening disc. This disc 14, Fig. 2, may be clamped between mica discs 22 by ring 17, bringing it into capacitative connection with the wall 15 of a screening box containing the grid leak 23, heater decoupling choke 20, and condenser 21. The anode is directly connected to the inner conductor 27 of a coaxial line output circuit tuned by a piston 28, sliding in guides 20, in the outer conductor 25. The output is taken off by an impedance matching probe 29a and coaxial line 29. The anode lead 42, Fig. 3, passes within the conductor 27 and is insulated by layers 39, 40 and sleeve 41 forming a capacity connection. Specifications 585,448, 585,449 and 585,452 are referred to.
Patent GB-912360-A (GB)
Title: Cephalosporin c, a transformation product of cephalosporin c
Inventor: ABRAHAM EDWARD PENLEY
IPC: C07D501/28
Filed: 1958-03-17
Abstract: The invention relates to Cephalosporin Cc, a transformation product of Cephalosporin C, having the formula <FORM:0912360/IV (b)/1> Cephalosporin Cc is neutral, substantially stable to penicillinase, has an Rf value of 0.15 in paper chromatography with an aqueous solution of butanol and acetic acid (4:1), unstable in N.hydrochloric acid, shows maximum absorption in the ultra-violet at 257 mm  and has a greater activity against Staph. aureus than against Salm. lyphi as compared with the activity of Cephalosporin C itself.  It is produced by treating Cephalosporin C in aqueous solution with hydrochloric acid of a normality of from 0.01N to N.  The temperature is room temperature and the duration up to 120 hours.  Cephalosporin Cc is separated from any copresent unchanged Cephalosporin C by passing an aqueous solution through a column of an anion exchange resin especially on the acetate cycle to absorb the Cephalosporin C, the Cephalosporin Cc being recovered from the filtrate.
Patent GB-725985-A (GB)
Title: A new or improved cutting-off machine
IPC: B24B27/06
Filed: 1953-03-30
Abstract: 725,985. Dust confining in industrial operations. SMITH BROS. & WEBB, Ltd., and SMITH, O. D. March 29, 1954 [March 30, 1953], No. 8667/53. Class 8 (2). [Also in Group XXIII] A severing machine employing a circular saw or grinding wheel (see Group XXIII) is fitted with a funnel 29 for trapping sparks and other products of the cutting operation and leading them through a nozzle 30 to a water tank 31.
Patent GB-512917-A (GB)
Title: Improvements relating to vacuum braking apparatus
IPC: B60T13/46
Filed: 1938-03-21
Abstract: 512,917. Fluid-pressure brakes. WESTINGHOUSE BRAKE & SIGNAL CO., Ltd., and SIMMONS, A. W. March 21,1938, No. 8681. [Class 103 (i)] Automatic vacuum brake apparatus comprises an additional brake cylinder the degree of vacuum in the upper chamber and thus the braking effect of which is adapted to be varied in accordance with the speed of the train, this variation being dependent on train pipe pressure. In the apparatus shown in Fig. 1 air is admitted from the train pipe 1, when the brake is applied, by a valve 8 to the upper chamber of the additional brake cylinder 3 unless the speed of the train is high, so that this brake cylinder exerts no braking action. The valve 8 comprises a valve 13 connected to a balance arm 12 on a diaphragm 10 on which acts the pressure in a vacuum train pipe 16 the vacuum in which depends directly on the speed of the train. If this speed is high the diaphragm 10 descends and closes the valve 13 so that the vacuum in the upper chamber of the brake cylinder 3 is maintained and this cylinder comes into action to give extra braking force when air is admitted to the train pipe 1. A second valve 14 is mounted on the balance arm 12 and connects the upper chamber of the cylinder 3 to a vacuum reservoir 20 to restore the vacuum in the chamber if this should fail and causedepression of the diaphragm 10. The reservoir 20 is charged by means of a check valve 23. In a modification the train pipe is not connected directly to the cylinder 3 by the valve 13 but acts on a diaphragm which operates a valve to admit atmosphere air to the cylinder, past a second valve operated by a diaphragm actuated by the speed-controlled train pipe.
Patent GB-268787-A (GB)
Title: Reflector diffusing apparatus for light
IPC: F21V7/09
Filed: 1927-03-30
Abstract: 268,787. Gachet, W. March 31, 1926, [Convention date]. Ceiling and like overhead lamps; mounting electric lamps in lanterns.-The globe of an overhead electric lamp comprises an opaline reflecting part a-6-c, a part c-d which is slightly unpolished or " satinised " to diffuse the direct and reflected rays, and an open bottom 4. A lamp bulb 5, having its lower part unpolished or frosted, is carried by a support 10 slidably adjusted in grooves 11 having indications for the different types of bulbs used. The upper end of the chimney is provided with ventilation apertures 14 and is secured by means of a bayonet joint to a suspension hood 15.
Patent GB-371136-A (GB)
Title: Improvements in firelighters
IPC: F24B15/00
Filed: 1931-03-21
Abstract: 371,136. Firelighters. SAIPE, B. T., 7, Wistow Grove, Boothferry Road, Hull. March 21, 1931, No. 8742. [Class 50.] Firelighters formed from wood pulp, cardboard, compressed paper, &c. are made in the shape of a collapsable frame made out of one or more strips 10, 11 perforated adjacent their edges and adapted to be opened out so that the strip edges constitute an open frame acting as a fuel supporting surface. A pair of strips may inter-engage as shown at slots in their upper and lower edges respectively or may be connected by staples. The strips may be scored at the bends or cut so that the edges 18 form easily ignited parts of the frame. Preferably the strips are of brownboard impregnated with paraffin dur.
Patent GB-325722-A (GB)
Title: Reversing gear for power driven shafts
IPC: F16H3/60
Filed: 1929-03-18
Abstract: 325,722. Scott, D. T., and Reid, J. A. March 18, 1929. Band or coil.-Reversing-gearing, particularly for marine engines, comprises driving and driven shafts 17, 16 having keyed thereto bevel pinions 9, 9 engaging pinions 10, 10 rotatably mounted in a gear casing 11 which is inserted as a separate unit into a drum 8 provided with an extension 12 which is externally held fast against rotation to provide a reverse drive. The gear is controlled by a lever 24, pivoted at 28. When the lever is moved away from the engines a wedge member 38 engages between adjustable screws 37 at the end of levers 35 to contract a divided outer ring 13 and hold the extension 12 aganist rotation. The member 13 is constrained against rotation by lugs 30 engaging with the engine frame.