baber/WOPTO huggingface dataset:
Patent GB-949465-A (GB)
Title: A pancratic optical objective
IPC: G02B15/14
Filed: 1960-01-18
Abstract: 949,465. Variable focal length objectives. VOIGTLANDER A. G. Jan.18, 1960 [Jan. 21,1959], No. 1749/60. Heading G2J. A variable focal length objective consists of a dispersing front member, a movable pair of collecting lenses (the variator) enclosing a fixed air space in the form of a collecting air lens, a fixed dispersing component (the erector) consisting of a pair of lenses enclosing a fixed air space in the form of a dispersing air lens, a collecting member (the compensator) which is movable with the variator to vary the focal length while maintaining the image position fixed and a fixed multi-lens rear compound system of positive power, wherein (a) the front member has a dispersing rear surface concave towards a stop on the object side of the multi-lens compound system; (b) the radius of one of the adjacent surfaces of the erector is more than 1-15 times but less than 2-15 times the radius of the other and the asymmetry of the surfaces enclosing the air space in the variator is greater than in the erector; (c) in the compensator there is at least one collecting glass/air surface bounding a variable air space and having a power which lies between 0. 25 and 1. 25 times the mean equivalent power of the complete objective. Preferably, the front lens has a surface power sum between 0. 2 and 0.65 times the mean equivalent power of the objective, the variator lens pair has a surface power sum between 0.65 and 1. 3 times said mean power, the erector has a surface power sum between 0.9 and 1. 8 times said mean power and the compensator has a surface power sum between 0. 65 and 1. 3 times said mean power. The multi-lens compound system to the rear of the stop position preferably includes a component with a strongly dispersing surface concave towards the stop, this surface having a power which numerically lies between 0.75 and 2.75 times the mean equivalent power of the complete objective. Between this component and a rear meniscus concave towards the rear, there is preferably disposed, a plurality of lens elements enclosing two or three collecting air lenses. In front of the component with the strongly dispersing concave surface may be placed a collecting element having a power sum which is less than 0.75 times the numerical value of the dispersing power of the concave surface. Optical data are given for three examples. Specifications 668,125, 685,945, 820, 590, French Specification 983, 124, U. S. A. Specifications 2,078,586, 2,165,341, 2,209,532, 2,235,364, 2,353,565, 2,454,686, 2,578,574 and 2,718,817 are referred to.
Patent GB-1493982-A (GB)
Title: Artificial or natural structures
IPC: E02D27/52
Filed: 1975-01-15
Abstract: 1493982 Repairing submerged structures BALFOUR BEATTY Ltd 14 April 1976 [15 Jan 1975] 1774/75 Heading E1H The submerged part of a pier 1 and a part of it protruding from the surface of a body of water 7 are surrounded by a fluidimpermeable flexible envelope 3 which is sealed at 4 to the bed of the body of water near the pier and to the pier at 5. Water is withdrawn from the enclosure 6 formed which is then partly filled with cement and air is evacuated so that sufficient pressure difference is created to force the cement into cracks or voids in the pier. In the embodiment of Fig. 3 (not shown) a framework lies between the envelope and a face of the pier.
Patent GB-110270-A (GB)
Title: Improvements in or relating to Fountain and Stylographic Pens.
Inventor: LIVSEY WILLIAM
IPC: B43K5/16
Filed: 1917-02-05
Abstract: 110,270. Livsey, W. Feb. 5, 1917. Reservoir pens; pencil and like holders.-In a reservoir pen of the kind having a nib or stylus which can be projected by the rotational movement of a stem h, this stem or its head i is surrounded by a collar j, split at k, so that when the cap l is pushed upon the collar, the latter closes rcund and grips the stem h which can then be turned by turning the cap. The interior of the cap l and the upper part of the collar are shaped to correspond, while the lower part of the collar may be shaped so as to make a tight joint with the part b<1>.
Patent GB-1015415-A (GB)
Title: Preparation of unsaturated acids
Inventor: FETTIS GORDON CHEYNE
IPC: C07C51/25
Filed: 1964-01-15
Abstract: Alkenoic acids are prepared by contacting a mixture of an alkenal and oxygen in the vapour phase at an elevated temperature with a catalyst containing molybdenum, tellurium, phosphorus, and oxygen.  The catalyst may contain between 0.05 and 2.0 gram atoms of phosphorus per gram atom of molybdenum and between 0.05 and 1.5 gram atoms of tellurium per gram atom of molybdenum.  The catalyst may be on a support, e.g. silica.  The feed contains 0.5 to 5 parts by volume of oxygen per part of alkenal and may contain gaseous diluent, e.g. nitrogen, steam.  The reaction temperature may be between 300 DEG and 600 DEG  C.  Reference has been directed by the Comptroller to Specification 967,485.ALSO:A catalyst containing molybdenum, tellurium, phosphorus, and oxygen is prepared by mixing aqueous solutions or suspensions of oxides, acids or salts of molybdenum, tellurium and phosphorus, evaporating the mixture to dryness and igniting it. Alternatively the component oxides and/or salts may be thoroughly mixed in the dry state and then the mixture is ignited. The mixture preferably contains 0,05-2,0 gram atoms of phosphorus and 0,05-1,5 gram atoms of tellurium per gram atom of molybdenum.  In the examples, molybdenum trioxide is dissolved in phosphoric acid and the resulting solution mixed with aqueous telluric acid.  Reference has been directed by the Comptroller to Specification 967,485.
Patent GB-748494-A (GB)
Title: Improvements in or relating to photographic fine grain developing processes
IPC: G03C5/26
Filed: 1953-01-23
Abstract: 748,494. Photographic development. HAUFF AKT.-GES. Jan. 23, 1953 [Jan. 25, 1952], No. 1960/53. Class 98 (2). In the fine grain development of photographic silver halide emulsions, a polycarboxymethylamino compound or a water-soluble salt thereof is added to the developer in amounts of 1 per cent or more by weight of water or used in a preliminary or after-development bath in amounts of 0.1 per cent or more by weight of water. Additives specified are trimethylaminotricarboxylic acid, ethylenediamine-tetracetic acid, di - (#,# - methylamino - diethylamine - dicarboxylic acid and p-phenylene-diaminediacetic acid and their sodium salts. The additives may be used in admixture with alkalis such as sodium or potassium hydroxides or carbonates, phosphates, hexametaphosphates, acid phosphates, bisulphites and silver and silver bromide solvents such as thiocyanates, thiosulphates, or cyanides. Specifications 496,252 and 520,753 are referred to.
Patent GB-1493461-A (GB)
Title: Signal-coupling circuit arrangements
IPC: H03K19/14
Filed: 1975-01-17
Abstract: 1493461 Signal coupling circuits WESTING- HOUSE AIR BRAKE CO 17 Jan 1975 [23 Jan 1974] 2030/75 Heading H3T A fail safe circuit for coupling a source of periodic input signals to an output comprises a plurality of cascaded optical couplers, at least one being non-inverting and at least one other being signal-inverting. In one embodiment, Fig. 5 a square wave applied at 1', 2', produces in-phase light pulses from D3. The light pulses cause phototransistor Q3' to conduct so that light pulses from photo-diode D4' are in antiphase with the input. The output from the emitter follower phototransistor Q4' is therefore in antiphase with the input. R4' may be connected to the cathode k4' instead of anode a4<SP>1</SP>, Fig. 4 (not shown). To provide extra current gain, inverters of Fig. 4 and Fig. 5 type may be connected in cascade with further stages which do not invert because the phototransistor is in series with the following photo-diode, Fig. 1 (not shown). In this case, overall inversion may be obtained by taking the output from a collector load of the final phototransistor.
Patent GB-101651-A (GB)
Title: Improvements in Spring Frames for Motor Cycles.
Inventor: PAGETT WALTER VICTOR
IPC: B62K25/28
Filed: 1916-02-11
Abstract: 101,651. Pagett, W. V. Feb. 11, 1916. Spring devices.-In a spring frame for motorcycles wherein the lower members of a rear-wheel carrying frame are pivoted to the main frame, the rear of the main frame is provided with a pair of leaf springs which are mounted in cantilever fashion, disposed substantially horizontally, and arranged with their free ends resting directly upon the lower members of the wheel frame at a point near to the axle. As shown in Fig. 1, the members c of a triangular wheel frame c, c', c<2> are pivoted at d to a main-frame bracket a', and the leaf springs b, fixed at a' to the bracket, are disposed inside the members c and bear upon them at point b<1> near to the wheel axle. The upper part of the wheel frame carries a bracket f which slides under the control of springs g, g' upon rods e pivoted at e<1> to the main frame; or other means may be employed to prevent lateral movement at the upper part of the wheel frame, and springs may be omitted. The springs b may be formed into a coil at their fixed end, and instead of being enclosed in the pivoted members, they may be arranged to bear upon channel-section or flat members.
Patent GB-694247-A (GB)
Title: Improvements in electric battery lamps
IPC: B62J6/02
Filed: 1951-01-26
Abstract: 694,247. Battery lamps. ALLISTONE, H. H. Nov. 7, 1951 [Jan. 26, 1951], No, 2047/51. Class 39(ii) An electric battery lamp, for use more particularly as a rear lamp for bicycles &c. comprises a casing 10 which is open at its lower end and of a size to accommodate at least two dry cells B of the cylindrical type arranged with their similar poles facing the same direction, and a cover flap or plate 12, which may be either hinged or removable, and carries on its outer side a housing 19 for a lamp bulb, a contact strip 24 on the inner side of the flap- 12 being so arranged that it is brought into contact with the battery poles at that end of the casing when the flap is closed, switching being effected by turning the: housing 19 about a mounting bush or eyelet 26 to bring either the centre contact of the bulb or a rearward extension 25 connected thereto, 'into contact with an offset tongue or extension of the contact strip- 24 projecting through a hole 23 in the flap 12. As shown the flap 12 is carried by a metal hinge plate 13 supported between lugs 16 on the side of the casing, the other end of the flap 12, on which the lamp housing 19 is mounted, being secured within the recessed underside of an offset foot 18 on the casing by a headed screw 28 which has a shank 27 screwing into the mounting bush or eyelet 26 supporting the lamp housing 19. The lamp casing is preferably of oval cross-section, and may be made of metal or insulating material. A resilient metal bridge .11 between the bases of the cells connects them in parallel and provides a connection to earth when the case is made of metal, otherwise an extended L-shaped metal strip is employed for that purpose.
Patent GB-595238-A (GB)
Title: Improvements in metal-vapour electric discharge converters
IPC: H01J13/34
Filed: 1942-02-16
Abstract: 595,238. Metal - vapour converters. GENERAL ELECTRIC CO., Ltd., and GALLIZIA, E. Feb. 16, 1942, No. 2049. [Class 39 (i)] [Also in Group XXXV] A metal vapour discharge converter comprises a cathode 5, a single main anode 4, and an auxiliary starting anode 6 between which and the cathode 5 an auxiliary arc is arranged to be continuously maintained, and means are provided for changing the current in the auxiliary arc path from a value producing a level of ionisation insufficient to permit striking of the main arc to another value producing a level of ionisation sufficient to permit such striking. The means preferably comprises a commutator 11 coupled with a synchronous motor 12 supplied through a phase shifter 13 from the A.C. supply 2, which is arranged to short-circuit part of a resistance 8 in the auxiliary arc circuit when it is desired to strike the main arc. A control grid (not shown) may be placed in front of the main anode 4 in which case the current controlling arrangement in the auxiliary arc circuit may be so coupled with the grid control circuit that the level of ionisation is sufficient at the instant at which the main arc is to be struck. Baffles 10 may be provided in front of the main anode 4, as shown, to assist in preventing the main arc from striking before part of the resistance 8 is short-circuited ; the baffles 10 may be replaced by a sleeve surrounding the main anode 4, the lower end of the sleeve being baffled by a plurality of vertically arranged slats. Alternatively the auxiliary arc path may be shielded by a metallic, graphite, or .insulating hood, (not shown); the auxiliary anode 6 is in this case mounted a short distance above the surface of the mercury cathode 5 on a rod parallel to the axis of the main anode 4. If of conducting material the hood may be suitably biassed, e.g. to assist in the striking of the main arc when required and to prevent it from striking at all other times. The invention may also be applied to polyphase arrangements. The Provisional Specification refers in addition to a baffle comprising a long and tortuous or constricted passage. Reference has been directed by the Comptroller to Specification 420,808.
Patent GB-450750-A (GB)
Title: Improvements in and relating to systems of electric resistance welding
IPC: B23K11/24
Filed: 1936-01-22
Abstract: 450,750. Control systems for resistance welding. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London. Jan. 22, 1936, No. 2061. Convention date, Jan. 22, 1935. [Class 38 (iv)] A welding period of one or more A.C. cycles or half cycles is obtained by grid-controlled discharge vessels in the welding circuit controlled by the secondary of a transformer, the secondary being short circuited as required, by a grid-controlled auxiliary valve to prevent ignition of the main discharge vessels. The welding electrodes 3 are supplied through the welding transformer 2 in circuit with the grid-controlled discharge vessel 4. The grid is biassed by battery 10 and is connected to the secondary of the control transformer 9 which is supplied from the mains through a phase shifting resistance 7 and condenser 6. Ignition of the discharge vessel 4 is prevented when the secondary of the transformer 9 is short circuited by ignition of the auxiliary valve 11, which is rendered non-conducting for one or more cycles as required, when the switch 12 is moved from contact c to contact b in conjunction with some adjustment of the electrodes 3. With the switch as shown against contact c, a positive bias is given by the battery 14 through resistance R1 to the grid, thus rendering the valve conducting; but when the switch moves to contact b, condenser c1 is charged, the resistance R1 having such a value that the grid voltage is rendered negative relatively to the cathode voltage for a sufficient period to allow energization of the discharge vessel 4 during several cycles. The rate of charging of condenser c1 is accelerated, so as to limit the welding period to one cycle, by means of a transformer 15, rectifier 16 and resistance R2, which is smaller than resistance R1. By switching in condensers c2, c3, c4, the charging interval may be increased so that the welding period includes two or more cycles. A second discharge vessel opposedly connected in parallel with the vessel 4 may be controlled in dependence thereon as described in Specification 448,833, to enable both the positive and negative parts of the cycle to be utilized.
Patent GB-267662-A (GB)
Title: Improvements in or relating to tipplers for unloading wagons or the like
IPC: B65G67/00
Filed: 1926-01-25
Abstract: 267,662. Simon-Carves, Ltd., and Ashton, E. June 25, 1936. Tipping-apparatus.-Relates to apparatus of the type in which tipping platforms 1, 2 are arranged at opposite sides of the hopper so that a wagon with a door at one end only can be discharged by means of the appropriate platform and no turntable is required. The platforms are raised and lowered by pairs of ropes 12, wound and unwound bv the same motor which runs in the same direction for raising one platform and lowering the other. The ropes 12 are long enough to permit both platforms to be down at the same time, and a pulley 15 rides upon a portion of the rope between guide pulleys 13, 14 at each side of the apparatus and moves down in the guides 16 to form a bight on the rope and take up slack. The ropes 12 may be replaced by an endless rope or chain.
Patent GB-972072-A (GB)
Title: Surface treatment of metal article by water soluble (film-forming) material
IPC: C09D5/44
Filed: 1961-01-18
Abstract: Metal surfaces are coated by electro-deposition using a bath containing (1) a water-soluble polymerized poly-alcohol, poly carboxylic acid and similar compounds, and (2) a hexa-valent or tri-valent chromium compound, and then removing the coated surface and heating it. A third component may be present in the bath consisting of an acid, e.g. HNO3, H2SO4, H3PO4, H3BO2, citric, acetic or oxalic acid or a derivative thereof.  Water soluble polymer compounds specified include partially hydrolysed vinyl acetate, P.V.A.-maleic acid polymer, polyethylene oxides, polymethylol ureas or melamines, polymers of poly alkyl vinyl ethermaleic acid, poly maleic acid-ethylene, maleic acid-vinyl acetate, and methacrylic acid or derivatives thereof; soluble starch, aminoacids, methyl cellulose, and cellulose partially etherified with lower alcohols.  Optional additions include glycerin, glycols, sorbitol, and polyamines. Surfaces of steel, Sn, Zn, Al or Mg may be treated, or such surfaces when plated, e.g. tinplate, galvanized iron.  In examples, the polymer compound is added at the rate of 40-60 g. per l., chromic acid or sodium bichromate 10-120 g., and H3PO4 or the zinc acid salt 1-10 g. The coating is then dried by heating at 150-300  DEG C.
Patent GB-579757-A (GB)
Title: Improvements in or relating to knife-edge bearings
IPC: F16C32/02
Filed: 1945-01-26
Abstract: 579,757. Knife-edge bearings. ERNST, D. Jan. 26, 1945, No. 2146. Convention date, Jan. 15, 1944. [Class 12 (i)] A knife-edge bearing device comprises two knife edges axially and angularly displaced relatively to each other and bearing on separate supporting faces. The arrangement locates the axis of turning. As shown, a rocking lever 5 has an axle each end of which is formed with a knife-edge 1 and with a support face 3 which respectively co-operate with a support face 4 and knife-edge 2 provided by a fixed standard 7. A spring 9 attached to a ring 10 encircling the shaft holds the knife edges against their respective support faces. The support faces may be curved, Fig. 4 (not shown). Plane support faces may be a continuation of one face of the knife edges, Fig. 1 (not shown). Specification 531,264 is referred to.
Patent GB-783398-A (GB)
Title: Improvements in electrical switches for rapid disconnection
IPC: H01H9/38
Filed: 1956-01-24
Abstract: 783,398. Electrically - released switches. CALOR - EMAG ELEKTRIZITATS AKT.- GES. Jan. 24, 1956 [Jan. 26, 1955], No. 2306/56. Class 38 (5). A high-speed switch has two fixed main contacts 3, 5, co-operating main movable contacts 4, 6, and parallel auxiliary contacts 7 . . . 9 arranged to be opened after the main contacts open, the movable main contacts 4, 6 being arranged on, or constituted by, a rotatable bridging element symmetrically arranged with respect to its axis of rotation which is coaxial with a torsion spring (indicated at 10) operatively connected to the bridging element for opening the contacts. In Fig. 1, when the current induced in a winding 20 is sufficient, an explosive charge 14 is detonated to release a latch 13 holding a pawl 12. The torsion spring then rotates the bridging element to open the main contacts 3 ... 6. After the main contacts have separated, a rod 17 is released and moves down under the bias of a spring 18 to open the auxiliary contacts. In Fig. 3, on the de-energizing of an electromagnet 31, an armature 32 is released to allow a member 30 to move upwardly under the bias of a spring to displace rollers 29<SP>1</SP> and permit the rotation of a bridging contact 22 by the torsion spring 10. The fixed main contacts may be pivoted or resiliently mounted for limited movement under the bias of springs. Figs. 4 ... 7 (not shown) illustrate various arrangements of the torsion spring which is a rod and may directly carry, or be coupled to, the bridging element. The auxiliary contact 7 may be opened by a lever carried by the spring striking a member carried by the rod 17, Fig. 8 (not shown). In another arrangement an eccentric carried by the torsion spring may collapse a toggle which normally holds the auxiliary contacts closed, Fig. 9 (not shown). In Fig. 10 (not shown), the movable auxiliary contact is a rotatable element directly connected with the torsion spring.
Patent GB-328298-A (GB)
Title: Improvements relating to mattresses and similar spring-supported surfaces
IPC: A47C19/02
Filed: 1929-01-23
Abstract: 328,298. Marsden, A., and Marsden, G. R. Jan. 23, 1929. Spring surfaces.-Hanger bars c for supporting springs in well-frame mattresses are mounted in slots or between abutments g on the side or end bars of the mattress frame and may be vertically adjustable.
Patent GB-246855-A (GB)
Title: Improvements in or relating to automatic voltage limiting means
IPC: B23K9/10
Filed: 1926-01-28
Abstract: 246,855. International General Electric Co., Inc., (Assignees of Allgemeine Elektricitõts Ges.). Jan. 29, 1925, [Convention date]. Controlling heating systems.-In an arc welding system, wherein a small voltage is to exist between an electrode l and work m, before these contacts com plete a circuit, and thereafter an increased voltage is impressed upon the circuit, a single automatically operated switch f is used. Before the electrodes l, m engage with each other, they are at a difference of potential due to the winding a of a transformer. Immediately after engagement, current flows through coils g, h, k, causing the switch to close and complete a circuit through both windings a, b of the transformer. a steadying choke c, holding-on coil k, and the arc between the contacts l, m. When the arc is broken, the voltage of the winding b is impressed upon coils g, h so that they aid each other, and upon an opposing coil i which neutralizes the effect of coils g, h, so that the switch drops to its initial position. An impedance z. prevents the magnetizing current through thecombined coils g, h, i attaining such a high value that the switch is prevented from dropping. A modified arrangement is described in which the coil i is shunted across part of the choke c, in which case it is possible to dispense with the coil k.
Patent GB-151883-A (GB)
Title: Improvements in or relating to display or show-cases and the like
IPC: A47F3/14
Filed: 1920-01-27
Abstract: 151,883. Johns, Son, & Watts, and Strong, G. Jan. 27, 1920. Fittings, external; contents, viewing; drawer- and-shell boxes.-A display or show case 3 is connected by a double hinge 5 to a support 6, the folding side wings 7 of which are detachably secured to the case by press-buttons 8. The support is slotted at 10 to receive the top of the case, which is shown furnished with a drawer 1 grooved to hold pencil-cases &c. The drawer may be omitted, access to the contents being had by the glass top 4, which is then made to hinge.