baber/WOPTO huggingface dataset:
Patent GB-1424637-A (GB)
Title: Circuit arrangement for feeding inductive alternating current  loads
IPC: H02M7/521
Filed: 1974-06-24
Abstract: 1424637 Inverting BROWN BOVERI &  CIE AG 24 June 1974 [22 June 1973] 27971/74 Heading H2F A circuit for feeding an inductive load L 1  (such as an induction heater) comprises an in-  verter 2 having a first capacitor C 1  in series with the load L 1 , a second capacitor C 2  in shunt with the load L 1  and a third capacitor C 3  in shunt with the output of the inverter 2. The capacitors provide the reactive power required by the inverter 2 and the inductive load L 1 . The circuit is such that the load voltage is 1À5- 2 times the inverter output voltage and the voltage across C 1  is somewhat smaller. A reactor diagram is included. The quotient of the inverter output phase angle and its angular frequency must be greater than the recovery time of the thyristors.
Patent GB-1480545-A (GB)
Title: Drinking cups
IPC: B65D85/816
Filed: 1975-07-03
Abstract: 1480545 Drinking cups E S FATTAL 3 July 1975 27986/75 Heading A4A [Also in Division B8] A drinking cup 12 is provided with a disc 17 having a diameter between the maximum and minimum diameters of the cup such that when the disc is inserted into the cup with its perimeter in engagement with the inner surface of the cup, it becomes wedged in the lower portion of the cup spaced from the base by a distance not more than one third of the height of the cup, thereby forming a chamber 18 which can contain a serving of dry beverage. The dimensions of the cup and disc are preferably such that when the cups are stacked or assembled in a dispensing tube 13, Fig.1, the walls of the cups are not wedged together. An internal shoulder 22, Fig. 2, limiting the insertion of the disc into the cup and pull tab 21 for removal of the disc from the cup may be provided. The cup may be made of plastics or plastics coated material and the disc of rigid plastics.
Patent GB-687918-A (GB)
Title: Improvements in and relating to chairs or seats
Inventor: SCOTT ROY FRANK
IPC: A47B91/10
Filed: 1951-11-29
Abstract: 687,918. Seats. GAUMONT - KALEE SEATING, Ltd. Nov. 29, 1951, No. 28056/51. Class 52(ii) In order that a theatre &c. chair may be accommodated to a slope of the floor the side standards 1 consist of two parts, a base part 4 adapted to be bolted to the floor and an uper part 5 which can be held in adjusted position on the base part 4 by a clamping bolt and nut 6, 7. The base part 4 is provided with an arcuate concave bearing 9, while the upper part 5 has a complementary concave part 10 and the bolt 6 carried by the base part 4 passes through a slot 11 in .the upper part 5. For increased stability the bearing surfaces may be tongued and grooved respectively. Reference has been directed by the Comptroller' to Specification 638,508.
Patent GB-328898-A (GB)
Title: Improvements in or relating to date indicators and other indicating devices for displaying variable information
IPC: G09D3/02
Filed: 1929-09-16
Abstract: 328,898. Hinkel, J., Hinkel, A., and Hinkel, P., (trading as Hinkel, E. P., [Firm of]). Sept. 16, 1929. Date indicators.-A device for displaying variable information of the type described in Specification 241,137 comprises two or more sets of indicating plates, cards. &c. movable together when the device is turned end for end, one of such sets being mounted in a detachable casing for the purpose of effecting a. relative adjustment of the indicating members. In the form shown as a date indicator, Figs. 1 and 3. a casing A with top and bottom portions A<1>, A<2>, is provided with a second casing C slidable between the portions A<1>, A<2> and retained in position by springs G. The casing A is divided into two compartments by a partition A<3>, Fig. 5, and contains a set of cards B bearing the names of the days of the week, one name being visible through an aperture A' in the casing. The other casing C, Fig. 4, is similarly divided by a partition C<1> and contains a set of cards D bearing the date figures and viewable through an aperture C<2>. Frames F<1> are provided at the back and front for the reception of carriers F provided with month name cards. Cover plates A', A<6> are provided for the top and bottom portions, the same being held by springs H.
Patent GB-142437-A (GB)
Title: Improvements in and relating to hydro-aero machines
IPC: B64C35/00
Filed: 1919-11-12
Abstract: 142,437. Curtiss Engineering Corporation, (Assignees of Curtiss, G. H., and Gilmore, W. L.). April 26, 1919, [Convention date]. Hydroplane vessels.-A flying-boat or hydroaeroplane comprises two or more main planes 10, 11 mounted upon a boat hull 18 having a hydroplane bottom of V-section, a cut-water bow 19, step 21, and knife-edge stern 20. The passengers, baggage, &c. are carried in the boat, a cockpit 24 being provided at the front'end for one or more of the crew.
Patent GB-154437-A (GB)
Title: Improved motor-plough
IPC: A01B33/04
Filed: 1919-11-14
Abstract: 154,437. Robiola, A. Nov. 14, 1919. Ploughs.-A motor plough is propelled by means of one or more screws or worms mounted on the frame and screwing into the ground in front of the ploughing-tools, which are adjustable independently of the worms. Fig. 1 shows a plough provided with one conical propelling-screw 7 driven from a motor 8 bv bevel-gearing. The screw is cleaned by a pivoted toothed bar 24 supported by a spring 25 and provided with an arm 27 against which snaps or strikes a notch or projection 28 on a driven shaft 11. The frame of the implement comprises uprights 1, longitudinal bars 2. and stays 3, and carries an oil tank 29. The plough body is mounted on rigidly connected steering-rods or handle-bars 17 pivoted on a transverse bar 3<1> and adjustably secured by means of a locking- rack 18 and catch 19. In a modification, a second screw in line with and behind the screw 7 is rotated in the opposite direction so as to push the machine forward. Fig. 2 shows a modification in which two screws are mounted side bv side and are driven in opposite directions by spur and chain gearing and a clutch, and in which two traction wheels 32 are provided for travelling on roads &c. The wheels 32 are independently mounted on pivoted bell-crank levers 33 provided with adjusting-screws 40. They are driven by chain gearing from a shaft 34 connected with the engine shaft through a clutch and a gear-box. The two clutches are controlled bv sliding levers 48. The forward part 43 of the plough beam is pivoted on a support 44 and the rear part 45 is connected to a ratchet-bar 56 the pawl of which is connected to a hand-lever 20<b>.
Patent GB-1005499-A (GB)
Title: Spark gaps for excess voltage diverters
Inventor: SEIBOLD ERWIN
IPC: H01T4/16
Filed: 1964-07-09
Abstract: 1,005,499. Surge diveriers. LICENTIA PATENT-VERWALTUNGS G.m.b.H. July 9, 1964, No. 28366/64. Addition to 1,004,972. Heading H2H. A surge diverter generally similar to that shown in Figs. 4 to 8 of the parent Specification is modified by altering the configuration of the electrode plates 1<SP>1</SP> and the insulating spacers therebetween (not shown) so that the arc gap formed by each pair of protuberances 7<SP>1</SP> is in parallel with a cylindrical ohmic- or voltagedependent control resistor 4<SP>1</SP> located by a leaf spring 5<SP>1</SP> and a projection 9<SP>1</SP> engaging the rear of protuberances 7<SP>1</SP>. A pre-ionization element 6<SP>1</SP> is provided for each gap at the inner end of a current confining slot 2<SP>1</SP>, Fig. 2 (not shown), the element 6<SP>1</SP> being a sharp metal point formed integrally with the electrode plate, Fig. 3 (not shown) or wedged into one of the slots 2<SP>1</SP>. Modifications include firstly making the preionization element from a material of high dielectric constant, this element being located between the electrode plates 1<SP>1</SP> by a leaf spring, and secondly locating the resistor 4<SP>1</SP> by means of a circular opening in an insulating spacer (not shown) between the plates 1<SP>1</SP>. The basic modification of the parent Specification may comprise the resistor 4<SP>1</SP> and/or the pre-ionization element 61.
Patent GB-1429655-A (GB)
Title: Map assemblies
IPC: G09B29/02
Filed: 1973-06-14
Abstract: 1429655 Maps A E GOODSON 13 June 1974 [14 June 1973] 28406/73 Heading G5G A map assembly comprises a support structure including a frame 8 surrounding a recess 9 in which are located two separate square panels 10, 11, each panel bearing a corresponding one of two "hemisphere" maps of the Earth's surface, e.g. the Western and Eastern hemispheres the panels being locatable in the support structure to provide any one of four different combined map presentations. The structure may have a support leg 7, as shown, or it may be in the form of a hand-held accessory, or it may be wall mounted. The panels may be of hardboard, plywood, card or plastics material, may have knobs or handles for ease of handling and may be retained in the frame by means of clips, magnetic means or resilient rubber edging strips. The reverse surfaces of the panels may carry further hemisphere maps, enabling any one of six further combined map presentations to be obtained.
Patent GB-1280908-A (GB)
Title: Areal scanning type photo densitometer
IPC: G01J1/42
Filed: 1970-06-11
Abstract: 1280908 Scanning photographic films KONISHIROKU PHOTO INDUSTRY CO Ltd 11 June 1970 [16 June 1969] 28425/70 Heading G1A [Also in Division H4] An areal scanning photo-densitometer, Fig. 1 capable of recording isodensity curves comprises a rotary drum 5 with a light transmitting part 1 and an electro-conductive part 3, supporting a photographic film 2 and a piece of discharge recording paper 4 respectively. Scanning of film 2 is achieved by means of a motor which rotates the drum 5 and a screwed rod 14 which moves a light projecting unit 8, a light receiving unit 9 and a discharge recorder 10. Light from a source 8a, Fig. 2, passes through a light diffusing part 1 of drum 5 and through film 2 and is received by a photo-electric transducer 9b. The output of transducer 9b is amplified and passed to an amplitude discriminator circuit which generates a pulse only when the level of the output of the amplifier coincides with a predetermined value. Each pulse effects a discharge on the discharge recording probe 10 so that constant density points in the photographic film can be plotted on the discharge recording paper, In a further embodiment, Fig.5 (not shown) the light diffusing plate and the metal discharge plate are provided in diametrically opposed positions on a single drum.
Patent GB-284046-A (GB)
Title: Improvements in and relating to calling devices in electric telegraphy
IPC: H04L5/16
Filed: 1926-11-11
Abstract: 284,046. Higgitt, H. V., and Eastern Telegraph Co., Ltd. Nov. 11, 1926. " Break-in " and other send-receive switching arrangements for simplex systems, - Comprises an arrangement for sending a break-in call or control current from the receiving to the sending end of a simplex telegraph system. The transmitter and receiver n are arranged in a roughly balanced bridge, a slow acting or heavily damped break-in relay g being connected in the conjugate arm. To send a break-in signal it is necessary to turn the switch-arm k at the receiving end from the receive " position m to the " send" position f, to close the additional switch h, and to close the battery circuit in the transmitter j. A steady current is thus sent to line, and this operates the call relay g at the sending end. Differential windings with or without shunt condensers and series resistances may be used instead of the bridge shown. At retransmitting stations the break-in relay g operated by the up cable may actuate the change-over switch for the down cable, and vice versa. In a modification (Figs. 4, 5, 6, not shown) a three-position switch is employed at each station : in the " send " and " receive " positions the state of the apparatus is as already described', and in the " call " or break-in position the switch connects the sending battery directly to the cable. The switches may move automatically at a slow rate from " call " to "send" and from "send" to "receive," the cable being earthed by each switch during the motion.
Patent GB-712924-A (GB)
Title: Improvements in fountain pens
IPC: B43K5/18
Filed: 1951-12-05
Abstract: 712,924. Reservoir pens. WAGNER, E. V. Dec. 5, 1952 [Dec. 5, 1951], No. 28504/51. Class 146(3) In a reservoir pen having a nibsurrounding nose, for example, in a pen as described in Specification 712,920, the nose b of synthetic plastic material has an arched metal cover f fitting on the end of the nose b so as to form an ink overflow recess h closed on the lower side by the nib e except for a fine clearance between the nib e and the rim of the cover f. Instead of an arched cover f, the cover may be substantially conical and so also surround the front of the feed bar d. The nose may be of polystyrene or methyl methacrylate, while the cover is of stainless steel or other non-corrosive metal. The cover may be secured to the nose b during moulding of the nose by an internal border f<SP>1</SP>.   Specification 712,923 also is referred to.
Patent GB-252619-A (GB)
Title: Improved means for protecting and strengthening boxes
IPC: B65D81/05
Filed: 1925-11-12
Abstract: 252,619. Walker, T. R. Nov. 12, 1925. Corner strengthening pieces. -A box is strengthened by three-sided corner pieces 1 having reduced arms 4 slidably connected with edge strips 6, the arms and strips having interengaging inturned flanges 5, 7. The pieces 1 have projections or hooks 9 connected by binding wires 8, the intermediate parts of which engage flanged edges 11 on plates 10 resting against the sides of the box.
Patent GB-1071184-A (GB)
Title: Improvements in the production of bonded granular objects
IPC: C22C32/00
Filed: 1964-07-10
Abstract: Bonded granular material is prepared by mixing 6-50% by weight of particles of aluminium, or an alloy containing a major proportion of Al, which can pass through an 80-mesh screen (U.S. Sieve series), with at least 0.02% (on the weight of the Al) of fluxing agent and alumina particles (at least 50% by weight of which pass through a 4 mesh screen and are retained on a 100 mesh screen), shaping into a porous body of porosity at least 20% after removal of volatile materials, firing the body in an oxidizing atmosphere, e.g. air, oxygen or a mixture of oxygen and inert gas, at 650-1700 DEG  C. for a time sufficient to oxidize at least 40% by weight of Al, the rate of heating being controlled so that the temperature of the body never exceeds the ambient temperature by more than 100 DEG  C.  The mixture to be shaped may also contain a bonding agent, e.g. ethyl alcohol, ethylene glycol, acetone solutions of carboxy-methyl cellulose, rubber, gum arabic, polyvinyl alcohol and natural glue, which burn off in the firing process.  The fluxing agent may be oxides of the alkali metals, the alkaline earth metals, V, Cr, Mo, W, Cu, Ag, Zn, Sb, Bi and precursors of these oxides, i.e. acetates, benzoates, bisulphates, bisulphites, bromates, nitrates, silicates, sulphates, sulphites, or thiosulphites of the metals.  The shaped refractory resulting from this process comprises 30-89% by weight of alumina particles bonded by a porous in situ oxidized crystalline phase of alpha-alumina, a compound of alumina with at least one other oxide, or a solid solution of an oxide in alumina or in said compound formed between an oxide and alumina, the bonding phase containing at least 72% Al2O3 by analysis.  Reference has been directed by the Comptroller to Specification 989,005.
Patent GB-391475-A (GB)
Title: Improved means for modifying the braking of permanent brake magnets in accordance with temperature
IPC: G01R11/185
Filed: 1931-10-15
Abstract: 391,475. Eddy-current brakes. FERRANTI, Ltd. and CLIFFORD, C. F., Hollinwood, Lancashire. Oct. 15, 1931, No. 28701. [Class 103 (i).] In order to modify the braking action of permanent magnets in accordance with temperature, a magnetic shunt having a negative permeability temperature coefficient is arranged between a pole of one magnet and an unlike pole of the other magnet, a further shunt connecting the remaining poles. In the construction shown in Fig. 1, two permanent magnets a, b are arranged so that the North pole of the magnet a and the South pole of the magnet b are above a horizontal rotor disc (not shown), the remaining poles being below the disc. One or more stampings c of material having a negative permeability temperature coefficient are provided between the lower poles so as to divert some of the flux from the North pole of the magnet b to the South pole of the magnet a and prevent it from traversing the rotor disc. The shunt c is made wider than the polepieces so as to provide a path for the flux fringes of the lower polepieces. The leakage path is completed by a further shunt d of mild steel or other material having a normal positive permeability temperature coefficient arranged across the upper polepieces. Rise of temperature causes an increase in reluctance of the flux leakage path, so that less flux is diverted and more traverses the rotor disc. A concentration of flux also occurs in the air gaps owing to the increase in reluctance of the path of the fringing flux. Figs. 3 and 4 show the application to a mercury motor meter. The shunt c encircling the lower poles of the permanent magnets a, b is attached to a brass or other non-magnetic plate f applied to the polepieces. The plates c, f and the upper shunt piece d are embedded in moulding material g in which is formed the mercury bath h containing the meter disc i.
Patent GB-173885-A (GB)
Title: Improvements in or relating to machine guns
IPC: F41A3/50
Filed: 1920-10-11
Abstract: 173,885. Dawson, Sir A. T., Buckham, Sir G. T., and Larsson, C. A. Oct. 11, 1920. Machine guns.- An automatic machine gun of the Vickers type has the following features, (1) the device C<3> described in Specification 165,857, for retaining the firing-spring C<1> and side-lever axis pin C<2> in assembled position, (2) the stop-piece D<2> for the crank D as described in Specification 165,858, (3) the sear and tumble! arrangement C<6>, C<5>, C<4> described in Specification 141,605, (4) the longitudinallypivoted cover B for the mechanism casing described in Specification 172,068, and (5) the crank-retaining device G described in Specification 173,883 for regulating the speed of discharge.
Patent GB-735862-A (GB)
Title: Method of cleaning removable dentures, orthodontic apparatus and golden dental bridge-works
IPC: A61C19/00
Filed: 1951-12-10
Abstract: Dentures and dental instruments are cleaned by treating them with an acid cleaning agent containing thio-urea or a derivative thereof. The thio-urea or derivative causes the dissolution of sulphur compounds in the usual tartar film on the dentures &c., the acid present dissolving the remainder of the film.  The articles may be dipped in a solution of the agent or the agent may be applied thereto in the form of a solution, a viscous mass, a powder, or a paste.  The cleaning agent specified comprises an aqueous solution of tartaric acid.  The derivatives of thiourea specified comprise allyl and acetyl thiourea.ALSO:Dental instruments are cleaned by treating them with an acid cleaning agent containing thio-urea or a derivative thereof.  The articles may be dipped in a solution of the agent or the agent may be applied thereto in the form of a solution, a viscous mass, a powder, or a paste.  The cleaning agent specified comprises an aqueous solution of tartaric acid.  The derivatives of thiourea specified comprise allyl and acetyl thiourea.
Patent GB-880251-A (GB)
Title: A developing apparatus for the silver salt diffusion process
IPC: G03D9/00
Filed: 1959-08-24
Abstract: 880,251. Developing apparatus. AGFA A.G. Aug. 24, 1959 [Aug. 28, 1958], No. 28871/59. Class 98(2). A developing apparatus for the silver salt diffusion process has a container for developing liquid with an insertion slot such that the negative and positive sheets are spaced apart as they are fed in together; upper and lower guide elements 6, 1 are provided, together with an intermediate guide member 5 in the form of rails, which engage the edges only of a sheet. The ends of rail 5 project from the insertion slot 4, the two sheets being fed in one above, and one below, said rails. The guides 1, 6 convey the sheets through the developer 2, and then upwards towards wringer rollers 3. The negative sheet 8 has its upper corners cut off, and is then attached to the perforated edge of the offset foil 9 forming the positive sheet by a strip of adhesive tape on the other side. The sheet 8 is then folded and bent back so that it has the curved appearance shown. It is then inserted into the developer tank with the foil 9 uppermost and riding on the rails 5. The sheet 8 is thus lifted out of contact with the foil 9 and the two sheets are drawn together through the developer, both being completely wetted.
Patent GB-418086-A (GB)
Title: Improvements relating to metal heat exchange tubes
IPC: F28F1/08
Filed: 1933-10-18
Abstract: 418,086. Helically-wound metal tubes. BYRNE, E. L. W., 329, High Holborn, London. -(Titenex Metal Hose Co. ; 500, Freling- huysen Avenue, Newark, New Jersey, U.S.A.) Oct. 18, 1933, No. 28883. [Class 99 (ii).] A heat-exchange gill 57 is incorporated with the helical strip from which metal tubes of the kind described, e.g., in Specification 101,418, [Class 99 (ii)], are formed. In a modification a tube and its gill are formed by a winding strip having the section shown in Fig. 4, the flanges 50, 51 of the adjacent turns of the strip being soldered or brazed together. Fig. 6 shows a modification in which one of the flanges is hooked.
Patent GB-1122306-A (GB)
Title: Improvements in or relating to penicillin derivatives
Inventor: HARDY KENNETH DAVID
IPC: C07D499/00
Filed: 1965-07-08
Abstract: The invention relates to penicillanic acid derivatives of formula <FORM:1122306/C2/1> wherein R is acyl and R1 is aryl, or R and R1 together represent alkylidene, a -acylalkylidene, cycloalkylidene, aralkylidene, succinyl, phthaloyl or substituted phthaloyl and X is acylamino or a cyclic derivative of an a -amino acetamido group of formula <FORM:1122306/C2/2> wherein R2 is a carbocyclic or heterocyclic aromatic group, R3 is hydrogen or methyl, R4 is C1- 5 alkyl or R3 and R4 together represent a tetramethylene or pentamethylene radical. The penicillins are prepared by reacting a functional derivative of a penicillin acid of formula <FORM:1122306/C2/3> with an N,N-disubstituted hydroxylamine of formula <FORM:1122306/C2/4> where X, R and R1 have the meanings above. A typical penicillin is N-(6-phenylacetamido-penicillanoyloxy)-benzylidene-imine and N-[6 - (2,2 - dimethyl - 5 - oxo - 4 - phenyl - 1 - imidazolidinyl) penicillanoyloxy]isopropylideneimine.  The above penicillins may be employed in depot therapy, e.g. by intramuscular injection.
Patent GB-1400801-A (GB)
Title: Wheel speed sensors for vehicle adaptive braking systems
IPC: H02K21/38
Filed: 1972-06-21
Abstract: 1400801 Measuring vehicle speed electrically BENDIX CORP 21 June 1972 [2 July 1971] 29045/72 Heading G1N The rotor of a vehicle tachogenerator is constituted by the input shaft 18 of the vehicle differential. The shaft is formed with projections 38 adjacent which is mounted a stationary coil and core assembly 46.
Patent GB-399987-A (GB)
Title: Improvements in electric soldering irons
IPC: B23K3/02
Filed: 1932-10-18
Abstract: 399,987. Soldering-irons. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and HUNT, J. R., c/o General Electric Co., Wembley, Middlesex. Oct. 18, 1932, No. 29128. [Class 83 (iv).] An electric soldering-iron of the type comprising a copper bit slidable through a tube heated by an electrical heating element, has the surface of the bit in contact with the tube coated with a layer of less easily oxidizable material, copper being a main constituent of the layer. This may be effected by heating the bit to about 350‹ C. in zinc dust or to about 900‹ C. in aluminium dust. Specification 227,448, [Class 83 (iv), Metals, Working], is referred to.