baber/WOPTO huggingface dataset:
Patent GB-593839-A (GB)
Title: Improvements in or relating to optical objectives
IPC: G02B13/02
Filed: 1945-06-18
Abstract: 593,839. Lens systems. TAYLOR, TAYLOR, & HOBSON, Ltd., and COX, A. June 18, 1945, No. 15392. [Class 97 (i)] A telephoto objective comprises a front convergent system consisting of a compound convergent member before a simple meniscus convergent member convex to the front, and a rear divergent meniscus doublet, the radii of the front and rear surfaces R7, R9 of which are respectively between .20 and .30 and between .10 and .20 times the equivalent focal length, the radius R5 of the front surface of the simple convergent member lying between .25 and .55 times such focal length and the difference between the radii of the front and rear surfaces of the whole convergent system being not less than .45 times such focal length. The contact surfaces of the front member may be cemented and those of the rear member air-spaced and of different radii or both surfaces may be cemented. Numerical data for three examples are given. Specifications 552,024 and 593,835 are referred to.
Patent GB-969911-A (GB)
Title: Production of esters
IPC: C07C69/80
Filed: 1961-04-28
Abstract: 969,911. Mixed benzyl aliphatic esters. MONSANTO CO. April 28, 1961 [April 28, 1960], No. 15431/61. Heading C2C. Mixed benzyl aliphatic or cycloaliphatic esters of organic di- or poly-carboxylic acids which form intramolecular anhydrides are prepared by admixing an anhydride of said carboxylic acid, a tri-aliphatic or tri-cycloaliphatic amine, a benzyl halide and an aliphatic or cycloaliphatic monohydric alcohol. The reaction may be carried out batchwise or continuously, preferably at 125-185 ‹C. using substantially equimolecular proportions. The benzyl halide reactant may be further substituted, e.g. by alkyl or alkoxy groups or by halogen atoms and a list of suitable alcohols and anhydride forming acids is given. Examples relate to the preparation of benzyl-alkyl, alkenyl and cycloalkyl esters of phthalic, trimellitic, succinic and maleic acids. Included among many specified esters are:- dibenzyl dipropyl pyromellitate, benzyl hexyl glutarate, benzyl 2-ethylhexyl succinate, benzyl tridecyl maleate, benzyl allyl phthalate, and benzyl cyclohexyl phthalate.
Patent GB-865867-A (GB)
Title: Improvements relating to reversible coupling circuits for counting devices
Inventor: LEONARD MICHAEL GILBERT
IPC: H03K29/00
Filed: 1956-05-18
Abstract: 865,867. Electronic counters. ELECTRIC & MUSICAL INDUSTRIES Ltd. May 20, 1957 [May 18, 1956], No. 15491/56. Class 106 (1). A coupling circuit between the orders of a reversible counter comprises two input terminals for receiving carry signals from the lower order, and two valves arranged to assume substantially equal intermediate levels of conduction in the absence of carry signals. On receipt of a carry signal at one terminal the conduction in one valve increases and in the other decreases, and when the signal is transferred to the other terminal a relatively large change of conduction between one valve and the other activates means for developing an output carry signal. As described, input terminals P and Q are connected to the " 9 " and " 0 " cathodes of a multicathode tube stage. A positive signal appearing at terminal P switches conduction in the long tail pair V1 to anode A and raises the voltage of its cathode. This condition tends to be maintained by the rectifier 8 and capacitor 10, so that when the positive pulse is transferred to terminal Q, conduction in V1 is switched over to anode B and this causes a sharp positive pulse at anode A which, applied to a normally biased-off left-hand triode of V2, causes momentary conduction in the latter. The network between anodes C and D of V2 develops two pulses in succession at terminals R and S respectively, and these are used to step on the next higher order multicathode tube. In a subtractive operation a transfer pulse at terminal Q precedes that at terminal P and the latter causes the right-hand side of V2 to conduct, resulting in successive pulses at S and R respectively which effect a " borrow " from the higher order. Specification 812,950 is referred to.
Patent GB-203060-A (GB)
Title: Improvements in and relating to the treatment of organic compounds with nitrous acid
IPC: C07C207/04
Filed: 1922-06-02
Abstract: Nitroso compounds of organic substances are prepared by interaction of the organic compound and nitrosyl sulphuric acid, water or ice being added in regulated amount so that nitrous acid is liberated at such a rate as to permit efficient reaction with the organic compound.  The nitrosyl acid may be previously diluted to the point at which dissociation sets in further water or ice being then added as required; this mode of procedure is especially beneficial when the compound is readily sulphonated: the dilution may also be effected by addition of a dilute mineral acid.  The process may also be carried out by dropping nitrosyl acid into a mixture of the compound with water or dilute mineral acid.  The nitrosyl acid used should be almost freed from nitric acid; this can be done by heating to 150-200 DEG  C or by treatment with sulphur dioxide.  The process is particularly applicable as a step in the production of indophenols such as carbazole-indophenols.  According to examples, (1) nitrosophenol is obtained by adding phenol to nitrosyl sulphuric acid which has been diluted with water or ice to the decomposition point, and gradually adding more water or ice; the nitrosophenol is isolated by pouring into water, or the sulphuric acid solution is strengthened by addition of 100 per cent acid, cooled to 25 DEG  C. and condensed directly with N-ethylcarbazole to form an indophenol; the latter is isolated by pouring into dilute ammonia; (2) nitrosyl sulphuric acid is added to dimethylaniline dissolved in hydrochloric acid, ice added, and the precipitated p-nitrosodimethylaniline hydrochloride filtered off after standing.ALSO:Nitrosylsulphuric acid is freed from nitric acid by heating to 150-200 DEG  C. or by treatment with sulphur dioxide.
Patent GB-1081652-A (GB)
Title: Improvements relating to liquid cooled electric transformer/rectifier equipment
Inventor: SINCLAIR WILLIAM DONALD
IPC: H01F27/40
Filed: 1964-04-15
Abstract: 1,081,652. Transformer/rectifier equipment. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. April 13, 1965 [April 15, 1964], No. 15603/64. Heading HIT. [Also in Division H2] An oil-cooled electric transformer/rectifier equipment comprises semi-conductor rectifiers 9 mounted externally, on a wall of, e.g. as in Specification 965,723, an auxiliary tank 6 secured to the transformer tank 1 as shown. The wall on which the rectifiers are mounted has cooling fins 11 contacting the oil. The oil is circulated by a pump 3 and cooled by a radiator 5, a baffle 13 directing the oil from the tank 6 to the bottom of the tank 1. The rectifiers 9 may be electrically insulatingly mounted on the wall by a thermally conducting body disposed between each rectifier and the wall.
Patent GB-1422544-A (GB)
Title: Semiconductor frequency multiplier circuit arrangement
IPC: H03B19/05
Filed: 1973-04-02
Abstract: 1422544 Bulk effect semiconductor device MITSUBISHI DENKI KK 2 April 1973 [31 March 1972] 15634/73 Heading H1K [Also in Divisions H2 and H3] In a circuit arrangement for multiplying a frequency of an input signal comprsing a body of semiconductive material forming a bulk effect semiconductor device 12, Fig. 4, biasing 32, 18A, 18B establishes within the body a biasing electric field Eo in a first direction, input 42, 22A, 22B establishes within the body, an alternating current input electric field El in a second direction substantially orthogonal to the first direction, and output 52, 56A, 56B extracts a current component flowing in the first direction through the body. The arrangement is such that the biasing electric field Eo and the input electric field El form a resultant electric field variable in at least a negative resistance or saturated region of the electric field to current characteristic of the device 12 in response to a change in the alternating current input electric field so that the current component has a frequency equal to a multiple of the input electric field. The body 12 can be of Group III-V materials such as GaAs, InP exhibiting Gunn effect including a negative resistance characteristic and Group IV materials such as Si, Ge exhibiting a current saturation effect with ohmic bias electrodes 18A, 18B. The electrodes 22A, 22B can be electrically insulated from the body by a film of silicon dioxide or nitride. By making the biasing electric field Eo not less than (Exm, Fig. 2a, not shown) at which the peak current point (M) occurs the device 12 operates in the negative resistance region (M-S) to produce an output current component of twice the input signal frequency through the resistor 52. By making the biasing field Eo less than (Exm) the input signal causes the body 12 to operate from the positive to the negative resistance regions to provide an output signal of frequency four times that of the input signal. The output electrodes (56A, 56B) are disposed on the dielectric film 20A or in ohmic contact with the body 12. In a modification the body 12 may be disposed in a section of waveguide so as to be subjected to an input electric field E1, the electrodes 22A, 22B and dielectric films 20A, 20B being omitted. In still further modifications the electrodes 22A, 22B may be in ohmic contact or connected with Schottky barriers or PN junctions with the body 12.
Patent GB-1091630-A (GB)
Title: Multi-point writing instruments
IPC: B43K24/16
Filed: 1966-04-07
Abstract: 1,091,630. Multiple retractable ball-point pens. A. HAUSER & CO. KOMM. GES. April 7, 1966 [April 7, 1965], No. 15644/66. Heading B6P. In a multiple, retractable, push-button, ballpoint pen, the suspension ball 5 of a pendulum rod selector 18 is held in a blind bore 17 in the push-button 1 by a tight-fitting bush 8. The lower edge of the bush 8 forms non-circular guide edges 20 (Fig. 3), which locate the lower end of the pendulum rod 18 over the head 11 of a selected carrier, when the instrument is tilted in the required direction. The push-button 1 is retained in the projected and retracted position against the bias of compression spring 9 by a known ball 6 and heart-shaped cam mechanism 7.
Patent GB-809003-A (GB)
Title: Improvements in impedance testing devices for electrical distribution networks
IPC: D04H1/54
Filed: 1955-06-01
Abstract: 809,003. Resistance; impedance measurement. FOSTER TRANSFORMERS Ltd., and JENNINGS, R. E. May 25, 1956 [June 1, 1955], No. 15709/55. Class 37. In testing the impedance between earth and neutral or between main and subsidiary earths of a distribution network a connection socket of the network having line L, neutral N and earth E conductors is flexibly connected to apparatus wherein a neon lamp 1 between the neutral and earth inputs lights when line and neutral are transposed and a relay 2 between earth and line inputs operates on correct connection thereof to close contacts 21, 22 to energize the primary 3 of a transformer over reversing switch 4. A secondary 31 wound to develop a voltage dependent on the current load thereupon is connected between the neutral and earth conductors and through a three-way range switch 71 to selected tapping points of a voltage divider 41, 42, 43, 44, while a secondary 32 closely coupled to the primary and decoupled from secondary 31 develops a constant reference voltage connected in series opposition to the voltage across secondary 31. The transformer is constructed so that the combined voltage is proportional to the current in the neutral-earth circuit and this voltage is connected over the first and second positions of a three-way switch 51 to a tapping on voltage divider 61, 62, 63 and over the third contact to the free end of the divider which is returned to the lower end of secondary 31. A further three-way switch 52 ganged with 51 alternatively selects a tapping on divider 41-44, a sliding tapping on resistance 63, and the junction of resistances 62, 63 for application to capacitance shunted A.C. meter 8 returned to the lower end of secondary 31, while the tapping on divider 61, 62, 63 is selected by three-way switch 72 ganged with 71. As shown in the first switch position a known fraction of the voltage across earth and neutral is measured by meter 8 as a function of the current therein, in the second position a known fraction of the difference voltage between secondaries 31 and 32 is applied to meter 8 for selective comparison with a known fraction of the voltage across secondary 31, and in the third position the meter measures a fixed fraction of the difference voltage as a function of load current, and the slider of resistance 63 calibrated in terms of the neutral earth impedance for the several ranges being adjustable for equality of readings in the first and second switch positions. Switch 9 enables a secondary earth E1 to be connected in lieu of the neutral to transformer 31 to enable the impedance between the two earths to be measured.
Patent GB-672488-A (GB)
Title: Improvements in electric storage batteries
IPC: H01M2/12
Filed: 1950-06-23
Abstract: 672,488. Batteries. WILLARD STORAGE BATTERY CO. June 23, 1950 [Oct. 20, 1949], No. 15712/50. Class 53. A storage battery is provided with a filling device comprising a boss 11 projecting from the cover 10 and terminating below in a tube 14 reaching to the required level of the electrolyte. Gas can escape from the battery through openings 16, 17. The boss 11 is provided with a pivoted spherical or cylindrical closure member 20 which is formed with a channel 23 leading into a cut-away portion or channel 22. In the position shown in Fig. 4 the tube 14 is closed by the solid part of the member 20 while the opening 17 communicates with the atmosphere through the channel 23. When electrolyte is to be introduced into the battery the member 20 is rotated to bring the channel 22 into alignment with the tube 14, the opening 17 then being closed by the solid part of member 20. Opening 16 may be provided with a baffle 18.
Patent GB-669244-A (GB)
Title: An improved rotary clothes drying apparatus
IPC: D06F57/04
Filed: 1950-06-23
Abstract: 669,244. Clothes driers. PILKINGTON, G. H. June 23, 1950. No. 15726/50. Class 52 (v). A radiating arm type of clothes drier in which the frame is raised and lowered by hydraulic means comprises a cylinder 1 bolted to the ground and an inner ram 11, escape of water between the cylinder and the ram being prevented by a gland 12. A chain 15 to limit the upward movement of the ram is connected between the foot of the ram and the base of the cylinder 1. An inlet tap 8 and outlet tap 10 control the flow of water. The ram 11 is formed with an upper flange 11a having a: groove 11b for ball bearings 17 on which a bearing flange 19 of the clothes line framework rests.
Patent GB-442345-A (GB)
Title: Improvements in cable reels
IPC: B65H75/14
Filed: 1935-05-30
Abstract: 442,345. Cable reels. LEWIS, H. S.; Stony Creek Mills, and FOX, M. L., Wyomissing, both in Pennsylvania, U.S.A. May 30, 1935, No. 15796. [Class 99 (ii)] In a cable reel comprising a pair of heads 12 and a drum 11, each head includes an annular side or lining plate 20, Figs. 1 and 2, preferably formed of segments welded together and reinforced by channel members 24, and also a diametral channel member 40 locating a hub 41. The outer edge of each side plate is secured between interfitting U-shaped rings 30, 31 of a felloe which are held together by rivets 32, and the inner edge is secured by bolts 50 or rivets between a flange 44 of the drum and a flange 45 of an annular ring 46. Alternatively, Fig. 4, the ends of the drum are located between flanges 29 on the side plates and the rings 46, the parts being secured together by welding or riveting, and the felloe rings are mounted with their flanges turned outwardly. Fig. 3 shows a modified construction of felloe.
Patent GB-1532445-A (GB)
Title: Gas phase polymerisation of mono-alpha-olefines
IPC: C08F255/00
Filed: 1975-04-17
Abstract: 1532445 Controlled polymerization of an olefin in the gaseous phase IMPERIAL CHEMICAL INDUSTRIES Ltd 29 March 1976 [17 April 1975] 15863/75 Heading C3P An alphamonoolefin is polymerized in the gas phase in the presence of an agitated bed of a solid polymer of the olefin and in the presence of a transition metal catalyst under conditions of temperature and pressure which are controlled, e.g. by continuous monitoring and adjustment of monomer and/or coolant feed rate, to be close to dew point conditions. Typical combinations satisfying these conditions are temperature/pressure combinations of 10À1 to 15‹ C./98 psig.; 43À4 to 48À3‹ C./243 psig.; and 88À0 to 92À9‹ C./607 psig., for propylene. A suitable polymerization apparatus (not shown) is also described.
Patent GB-479681-A (GB)
Title: An improved process for treating tinplate and tinplate articles
IPC: C25D11/34
Filed: 1936-06-06
Abstract: Tinplate food containers are treated to remove surface impurities from the tinplate by anodic treatment followed by cathodic treatment. It may then be provided with a protective film by a final anodic treatment or it may be coated with lacquer by a roller, by spraying, or by electrodeposition.  The preliminary treatment may be effected in ammonia or ammonium carbonate with high current density and vigorous evolution of gas; anodic oxidation may be effected in the same electrolyte but with lower current density.  Anodic oxidation may also be effected in a solution of sodium or potassium dihydrogen phosphate or monohydrogen phosphate or a neutral mixture of dihydrogen and monohydrogen phosphates.  Lacquer may be electrodeposited from an alkaline emulsion over an anodic oxide coating.  The operations may be applied to the treatment of the tinplate food containers, particularly the inside thereof in rapid sequence.  Specification 479,746 is referred to.  Specification 455,810, [Group XXXVI], also is referred to in the Provisional Specifications.
Patent GB-492545-A (GB)
Title: Improvements in or relating to aircraft landing gear
IPC: B64C25/04
Filed: 1937-06-08
Abstract: 492,545. Retractable landing - gear for aircraft. FAIREY AVIATION CO., Ltd., LOBELLE, M. J. O., and TROTTER, J. C. June 8, 1937, No. 15871. [Class 4] In aircraft in which the tail wheel, tail skid or other tailsupporting member is retractable from a landing position to a position closer to the tail of the aircraft, but in which it still projects therebeneath, the retracting-gear is so arranged that the tail wheel or the like is retractable independently of retraction of the undercarriage but is extended automatically and concurrently with extension of the latter. In one form, Figs. 1, 2, and 3, an undercarriage leg 11 is formed with a lateral extension 12 having a notch 13 formed therein. Extension 12 rotatably carries twin sprocket wheels 14, 15 of which one is connected by a chain with a hand control 21 and the other with a sprocket 23 actuating the tail wheel retracting lever 31. Sprocket 14 is provided with a pawl 16 spring urged to engage notch 13. A cam 17 is fixed to the aircraft in position to engage the heel of pawl 16 and rotate this clear of the notch when member 11 and the tail wheel are in the landing position, thus permitting retraction of the tail wheel independently of the undercarriage. The pawl engages in the notch 13 so soon as member 11 is returned to the retracted position, Fig. 3, so that extension cannot take place independently of extension of the tail wheel. An oleo strut 27 carrying the tail wheel is carried by opposed links 28, 29 and connected by a link 30 to a lever 31 fast with a sprocket 21 coupled by a chain to sprocket 14. The tail wheel is maintained in the extended position by a spring 33 which urges the upper end of link 30 against a stop 32.
Patent GB-787678-A (GB)
Title: Means for adjusting the distance between rollers in rolling mills
IPC: B21B37/60
Filed: 1955-06-03
Abstract: 787,678. Electric control systems. ALLMANNA SVENSKA ELEKTRISKA AKTIEBOLAGET. June 3, 1955 [June 4, 1954], No. 15918/55. Class 40 (1). The pass between mill rollers 1, 2, Fig. 1, may be adjusted by gears 4, 5 driven from an electric motor 3 which may be stopped or started by a relay and switch 8 in circuit between potentiometers 7 and 9. The potentiometer 9 may be rotated by the motor 3 until its resistance is balanced against a potentiometer 7 having a middle tap M and resistances R1-R7 and R<SP>1</SP>1-R<SP>1</SP>7 controlled in pairs by relay coils Rr1s-Rr7s so that as one resistance on one side of the middle tap M is shorted out by a relay operated switch a resistance on the other side is switched in, thus having the effect of electrically moving the tap M. In operation, the relay 8 maintains its switch in a central position so that the motor 3 is stationary, but when adjustment between the rollers is to be made, the relays are energized sequentially by a variable punch card system so that the balance between the potentiometers 7, 9 is upset by a required amount in one direction or the other to cause current to pass through the relay 8 to start the motor 3, which motor alters the pass between the rollers and rotates the potentiometer 9 back to a position of balance. If, for example, seven resistances are used on each side of the middle tap M and if these resistance values are chosen so that they form a geometrical series with the power 2, then there will be 127 possible ways of adjustment. The punch card system.-The adjustment between the rollers may be controlled by means of a punch card 17 formed of a plate 19 of insulating material and a thin metal contact plate 18 connected with line III of the motor 3. The contacts 15 are pressed against the insulation 16 by springs 23 and are arranged in twelve vertical rows 1<SP>11</SP>-12<SP>11</SP> and may pass through the plate 19 to contact the plate 18 where the punch holes permit. Each coil of the relays is connected with a corresponding horizontal row 1<SP>1</SP>-7<SP>1</SP>, but in such a manner by a selector switch 14 having contacts 20 that the relays are coupled simultaneously only with one vertical row of contacts 15, and are energized in a sequence determined by the particular card used. In a modification, the metal part of the card attached to the motor 3 may have holes therein large enough to allow the unrequired contacts 15 to pass therethrough without making contact. It is also possible for the relay coils to be connected with a single row of aligned contacts and for the card to move step by step.
Patent GB-1189417-A (GB)
Title: Improved traction apparatus
Inventor: VIEL EDMOND PIERRE ROBERT
IPC: A61H1/02
Filed: 1968-04-03
Abstract: 1,189,417. Traction apparatus. E. P. R. VIEL. 3 April, 1968 [25 Jan., 1968], No. 15966/68. Headings A5R and A6M. An apparatus for traction exercises comprises a rod-like member to which tractiontransmitting elements 11 and 12 (fig. 4) for securing to the body are attached, the rod-like member comprising two elongated elements 1 and 1' connected lengthwise with one another, their free ends having ferrules 6, 6' to allow the attachment to the elongated elements of the traction-transmitting elements. The apparatus further includes a tensioning string 9' interconnecting the free ends of the rod-like member, the string being tightened and loosened by moving the handle 10. The elongated elements can be subjected to prestress by the tensioning string before the apparatus is used and the stress can be varied as desired during the use of the apparatus.
Patent GB-836413-A (GB)
Title: Improvements relating to boots and shoes
IPC: A43B13/20
Filed: 1956-05-23
Abstract: 836,413. Foot-arch supports. SIMPSON, W. May 15, 11957 [May 23, 1956], No. 15982/56. Class 17(2) A foot-arch support 3 raises the foot over its whole length without supporting the longitudinal arch or the toes. The support fills the heel 4 and tapers to an end 5 just short of the toes. It has no local elevations or arch supporting devices. The support may be placed under an inner sole, between the outer and inner soles, or may form a separate sock and, is in each case formed of resilient or flexible material such as rubber, leather or synthetic resin.