baber/WOPTO huggingface dataset:
Patent GB-722325-A (GB)
Title: Improvements in or relating to variable magnification optical systems
IPC: G02B15/14
Filed: 1951-09-11
Abstract: 722,325. Lenses. WATSON & SONS, Ltd., W., and HOPKINS, H. H. Dec. 8, 1952 [Sept. 11, 1951], No. 21425/51. Drawings to Specification. Class 97 (1). A variable magnification system comprises a negative lens between two positive, the negative lens and the rear positive lens being oppositely adjustable so as to maintain the image of a fixed object at a fixed distance, the two movable lenses each having, at one position of their movement, magnifications of unity and forming an image which is erect with respect to that formed by the front positive lens. When the movable lenses are as nearly as possible in contact their combined magnification is preferably equal to the positive square root of the ratio of maximum and minimum magnifications of the complete system. In this position each of the lenses has an individual magnification which is the reciprocal of its magnification at the far limit of its movement. The front positive component may be adjustable for focusing and preferably has a focal length equal to the geometric mean of the maximum and minimum focal lengths of the system. The stop is preferably situated between the two movable lenses at their near limit and is adjusted, with the magnification, to keep the effective aperture of the system constant. The movable lenses may each be doublets or may be replaced by symmetrical pairs of doublets. Additional systems of adjustable lenses may be provided in succession along the axis, all the negative and positive lenses, respectively, being coupled for simultaneous movement. Data are given for one example in which the normally stationary lens and the two movable lenses are each'doublets. Specifications 639,610, 639,611, 639,612, 646,409 and 685,945 are referred to.
Patent GB-336570-A (GB)
Title: Improvements in vertically sliding doors
IPC: E06B3/44
Filed: 1929-07-12
Abstract: 336,570. McKee, J. H. July 12, 1929. Controlling doors by springs; checks.-A vertically sliding door is counterbalanced by spring-controlled drums and by cables connected to the lower edge of the door so that the increasing pull on the cables as the door closes is automatically balanced. The two cables may be wound in superimposed coils at increasing radius, Fig. 4, or on conical drums 56, Fig. 8, so that the increasing leverage and spring tension as the door opens automatically balance the cable pull.
Patent GB-392026-A (GB)
Title: Improvements relating to hard courts for lawn-tennis or other games
IPC: E01C13/06
Filed: 1932-08-02
Abstract: 392,026. Tennis and like courts. SPURRIER, J. M., Marston Hall, Hilton, near Derby. Aug. 2, 1932, No. 21598. [Class 20 (iv).] A hard court for games comprises a porous bed upon which is laid a main layer, or subsurface, of gypsum. The purest forms of gypsum such as plaster of Paris may be employed, or inferior or adulterated forms such as gob gypsum or foulstone gypsum may be used, the latter containing some 10 per cent of marl. As an example, a bed of clinker from four to eight inches thick is covered with a layer of crushed gypsum. This layer is # inch thick and the material is crushed or ground to pass through a screen of # inch mesh. A dusting of fine gypsum or gravelly binding material, and finally a top dressing of colouring material composed of silica or quartzite base, are then applied.
Patent GB-818771-A (GB)
Title: Improvements relating to frictional cleaning devices
IPC: A46B15/00
Filed: 1954-07-23
Abstract: 818,771. Massage appliances. MICHELS, R. Oct. 24, 1955 [July 23, 1954], No. 21616/54. Class 81 (2). [Also in Group XXIII] A friction device for cleaning between the toes comprises a friction head which is generally of cylindrical shape with tapered ends and which is mounted on one end of a stem that extends along the axis of the head and is formed as or provided with a handle at one end and has a smooth tapered knob at the other. In Fig. 1 the brush is of circular section and comprises natural, nylon or rubber bristles secured between wires preferably of untarnishable metal. A tapered knob 3 facilitates the introduction of the brush between the toes. The whole device could be made in one piece by moulding. In Fig. 5 (not shown) the device is in the form of a sponge while in Fig. 2 it consists of graded P.V.C. discs having a star-shaped and/or slit periphery. The stem may be stiff or flexible and may be formed bent.
Patent GB-1023957-A (GB)
Title: Process and apparatus for separating ions electrolytically
IPC: C02F1/469
Filed: 1963-05-30
Abstract: <PICT:1023957/C6-C7/1> Solute ions are removed from a polar solution e.g. de-salinating brackish water, by applying a low voltage to electrodes of large surface area relative to the treating space; the ions are thus electrostatically charged, the potential applied being below the decomposition voltage of the solute, but above the electro-capillary maximum, whereby the positive and negative ions of the solute are concentrated at the electrodes.  By sequentially applying a series of different-charges to the solution, a series of solutes can be formed and removed.  For example using carbon electrodes and treating brine solution, a voltage of 0.4 V. is applied and when the current ceases to flow due to the build up of solute ions on the electrode, the voltage is increased by 0.4 V., and the process continued in steps to a maximum of 1.6 V.  (In contrast to the decomposition voltage of 4 V.).  A suitable apparatus consists of two columns 10, 11 filled with blocks of porous carbon 12, 13, 12a, 13a, charged alternately positive and negative, and connected to a switch mounted across a D.C. power source 16.  Sea water is admitted from a header 20 to the column 10, and the voltage is applied in steps to the maximum value of 1.6 V.  The solute ions are removed from the electrodes by washing out with sea water, and while in the discharging phase, column 11 is activated by the switch, the two columns thus operating alternately.  Reference is also made to removing solutions Fe, Mg, Al, sulphate, bromide, and carbonate.
Patent GB-1123229-A (GB)
Title: 5-hydroxy-6-methyl-cinchomeronitrile
IPC: C07D263/42
Filed: 1966-05-17
Abstract: <FORM:1123229/C2/1> <FORM:1123229/C2/2> 5 - Hydroxy - 6 - methyl cinchomeronitrile (I) is made by reacting a (5-C1- 3 alkoxy-oxazol-4-yl) -acetic acid or an alkali metal salt thereof (IV) with fumaronitrile.  The reaction is preferably effected at below 50 DEG  C. in the presence of a solvent for fumaronitrile, e.g. water, or a C1- 3 carboxylic acid.  Nitrogen gas may be passed into the reaction solution to assist removal of carbon dioxide evolved in the reaction.  The (5 - C1- 3 alkoxy - oxazol - 4 - yl) acetic acid and the alkali metal salts thereof are prepared by reacting a di-C1- 3 alkyl N-formylaspartate (II) with phosphorus pentoxide to yield the C1- 3 alkyl (5-C1- 3 alkoxy-oxazol-4-yl) acetate (III) which is hydrolysed with an alkali metal hydroxide or carbonate to the salt of the corresponding acid; the free acid may be liberated from the salt by treatment with dilute mineral acid.
Patent GB-1271473-A (GB)
Title: Diaphragm type fluid seal
IPC: F02M37/00
Filed: 1970-05-06
Abstract: 1,271,473. Diaphragm seals. BENDIX CORP. 6 May, 1970 [27 May, 1969], No. 21765/70. Heading F2B. [Also in Division F1] A seal for the control rod 50 of a fuel metering unit comprises a flexible diaphragm 78 connected at its outer portion 76 to the housing 28 by means of retaining rings 68, 80 and connected at its inner portion 84 to the rod with an intergerence fit for movement therewith during operation, the inner portion being adjustable along the rod to a predetermined position to eliminate the spring-loading effect of the diaphragm on the rod imposed by the deformation of the central aperture of the diaphragm as a result of the interference fit. As shown, the inner portion 84 of the diaphragm is advanced along the rod by a screwthreaded sleeve 87 to a position where the undesired loading of the diaphragm is eliminated and the ball valve 48 lightly seats on its seat 43. The sleeve is then prevented from rotating by a hexagonal ring 92 which is inserted between the sleeve and an air diaphragm assembly member 62. The assembly of the unit is completed by fitting a "constant head" spring 101, with its retainer 102 and securing it by a washer 98 and nut 100. The seal retaining rings 68, 80 may be made of synthetic material and secured to the housing 28 by a press-fit.
Patent GB-264415-A (GB)
Title: Improvements in game apparatus
IPC: A63B67/06
Filed: 1926-09-04
Abstract: 264,415. Dehmel, A. Sept. 4, 1926. Table games.-Rings d are projected by disas e on to halberds c removably fitted into a column a, the column being hollowed to receive the halberds, rings, and discs, and closed by a sliding plate.
Patent GB-405333-A (GB)
Title: Improvements in or relating to cinematograph cameras
IPC: F23Q1/00
Filed: 1932-08-04
Abstract: 405,333. Kinematograph cameras. SIEMENS & HALSKE AKT.-GES., Siemensstadt, Berlin. Aug. 4, 1932, No. 21954. Convention date, Aug. 4,1931. [Class 97 (i).] A camera is so constructed that the position of one or more film guiding members, which are moved to permit threading, control the transmission of motion to the whole film-feeding means ; operation of the film-feeding means may be rendered impossible until the positions of the film-guiding members are adjusted by hand, or may automatically adjust the position of these members. The Figs. show such constructions applied to cameras of the type described in Specification 378,205, wherein a movable part 3 of the gate is automatically moved into and out of operative position during locking and unlocking of the cover of the camera. The part 3 is carried by a plate 18 having pins 19, 20 projecting through horizontal slots 21, 22 in a fixed plate 2, and the pin 19 also projects into an inclined slot 23 in a vertically movable slide 24. The slide 24 has projections 25, 26 engaging the pin 27 of the knob 28 of a cover lock comprising a vertically-movable hook 29 engaging a hook 31 on the cover 30 ; movement of the knob thus operates the lock and moves the gate member 3. The film-feeding means is controlled by a release knob 17 movable in a slot to turn an arm 16<1> about a central pivot and thus move a catch 16 out of, or into, engagement with a projection 15 on a motor-driven disc 10. The disc 10 carries a crank pin 11 operating a feed claw 6, and an arm 12 rigidly secured to the pin 11 carries a crank pin 13 operating the thrust rod 14 of an intermittent shutter. As shown in Fig. 1, the slide 24 is provided, according to the present invention, with a projection 36 which engages the projection 15 and prevents substantial feedmovement, if the knob 17 is moved to release the driving mechanism while the slide is in its lower position, the gate member 3 being then open and the cover unlocked. Closure of the cover lock closes the gate and moves the projection 36 to permit operation of the mechanism. In the construction shown in Fig. 2, a wheel 37 driven by the mechanism carries pins 38 which, when the mechanism is released, raise the slide to effect gate closure &c. Further constructions are described, in one of which an arm fixed on the pin 20 engages the arm 16 so that movement of the arm shuts the gate if it be open, and in the other, a projection from the slide 24 prevents movement of the knob 17 while the gate is open. The movable film guide may itself control the film-feeding means.
Patent GB-359950-A (GB)
Title: Improvements in and relating to moulded, waterproof fibrous products and process forthe manufacture of same
IPC: D21J7/00
Filed: 1930-07-21
Abstract: Waterproof fibrous products are moulded by forming an aqueous mixture of fibrous stock and an aqueous dispersion of a bituminous substance such as asphalt or an artificial dispersion of rubber, causing the dispersed particles to be deposited on the individual fibres and then forcing the mixture against a foraminous mould under the influence of suction or pressure.  The watery pulp is introduced into a beater engine and is there waterproofed by the process described in Specification 359,902.  The treated stock is transferred to the moulding apparatus and the moulded article is then removed and dried so that the dispersed particles of asphalt coalesce to form continuous waterproof films.  The dried articles may, if necessary, be moulded between dies under the action of heat and pressure. Hollow articles such as buckets are formed by the process and also articles such as roofing tiles and fibrous motor-car tops. Specifications 244,135, 276,395, 315,839, [all in Class 96, Paper &c.], and 343,427, [Group III], are referred to. Reference is also made to U.S.A. Specification 1,498,387.
Patent GB-738445-A (GB)
Title: Steroid alkali-metal enolates
IPC: C07J75/00
Filed: 1953-08-10
Abstract: The invention comprises a 21-alkoxyoxalylprogesterone, the corresponding alkali-metal enolate, the corresponding D 16 compounds, and their preparation by treating progesterone or 16-dehydroprogesterone, with an alkali metal base and an alkyl diester of oxalic acid, e.g. dimethyl or diethyl oxalate.  The reaction may be effected between room temperature and the boiling point of the reaction mixture.  As alkali metal base there may be used sodium methoxide, sodium ethoxide, sodium amide in benzene, sodium propoxide or potassium in t-butyl alcohol.  Examples disclose the production of the sodium enolate of 21-methoxyoxalyl-, 21 - ethoxyoxalyl - and 21 - isopropoxyoxalyl - progesterone, the potassium enolate of 21 - ethoxyoxalyl - progesterone, the sodium enolate of 21 - methoxyoxalyl -, 21 - ethoxyoxalyl - and 21 - propoxyoxalyl - 16 - dehydroprogesterone, and the potassium enolate of 21-methoxyoxalyl - and 21 - ethoxyoxalyl - 16-dehydroprogesterone. Other compounds are mentioned.  The conversion of the 21-glyoxalic ester of progesterone to 21-acetoxy progesterone is described. Specification 518,571 is referred to.
Patent GB-1272616-A (GB)
Title: Instrument for applying artificial eyelashes
Inventor: MARTIN JAMES BABTIST JR
IPC: A41G5/02
Filed: 1969-04-30
Abstract: 1,272,616. Gripping false eyelashes. J. B. MARTIN JNR. 30 April, 1969 [30 April, 1968], No. 22041/69. Heading B4W. A tool for gripping an artificial eyelash 7 comprises co-operating clamping members 8 and 9 located at the ends of a pair of co-operating handle portions 1 and 2, the clamping members being separable by relative movement of the handle portions 1 and 2 with respect to one another. In the embodiment shown a longitudinally extending groove 10 in the handle portion 2 and a co-operating rib 11 in the handle portion 1 allow handle portions 1 and 2 to slide longitudinally with respect to one another. The handle portions 1 and 2 may be pivotally attached to the clamping members 8 and 9 (Figs. 5 and 6) thus permitting lateral rotation of the handle portions 1 and 2 with respect to the clamping members 8 and 9. The clamping member 9 has a ridge 4 constructed from a soft resilient material extending along its lower edge. In a further embodiment the handle portions are pivotally coupled to one another so that clamping members may be opened and closed by a scissor-type action.
Patent GB-510298-A (GB)
Title: Improvements in or relating to projection screens
IPC: G03B21/56
Filed: 1938-07-25
Abstract: 510,298. Projection screens. HARKNESS, T. S. July 25, 1938, No. 22085. Drawings to Specification. [Class 97 (i)] Closely woven metal fabric, such as wire gauze or knitted wire fabric, is impregnated or coated with a water-resisting surfacing composition or paint to provide a projection surface, and is perforated for sound transmission. The fabric may be 70 mesh gauze of 38 gauge soft phosphor bronze wire or 60 mesh gauze of 37 gauge copper wire, and the paint may consist of barytes and zinc oxide with appropriate oils and solvents and a small proportion of cellulose material. The paint is preferably fireproof ana may be applied bv spraying on to one side, or in bulk on one side, the gauze being then passed between a roller and a knife edge. The perforations may be circular, of one sixteenth of an inch diameter, and may be arranged one sixth of an inch apart in rows and staggered or otherwise; they may be formed before or after the application of the paint. The screen may be formed of several fabric sections sewn or clipped together. Specifications 499,923 and 510,313 are referred to.
Patent GB-340270-A (GB)
Title: Improvements relating to apparatus for the automatic discharge of liquids in accordance with their specific gravity
IPC: B01D17/02
Filed: 1929-07-18
Abstract: In apparatus which may be used for delivering refuse acid of high specific gravity which has been used in nitrating cellulose, separately from that of lower specific gravity, the liquid passing through a chamber a is discharged through a hopper l to one of two outlets r, s according to its specific gravity.  A float b in the chamber a is connected by a lever f and adjustable links j, k to the hopper, <PICT:0340270/IV/1> which oscillates about shaft p so that the outlet o of the hopper, which is formed by two slightly separated plates, delivers to the outlet r or the outlet s according as the float is raised or lowered.  The float, which may be of stainless steel, has suitable loading c.
Patent GB-172058-A (GB)
Title: Improvements in locking devices or safety apparatus for lifts or hoists
IPC: B66B13/08
Filed: 1920-07-26
Abstract: 172,058. Whittle, E. July 26, 1920. Controlling independently of drivers.-In locking devices for the collapsable gates of lifts, vehicles, &c., of the kind in which the lift &c. cannot be actuated until the gate is locked and vice versa, locking levers are employed which are actuated in a similar manner to the locking levers of a lock. The handing chain of a lift, or a chain connected to an arm on the starting shaft of a vehicle, is provided with a bar a, Fig. 4, having slots a<1>, a<3> and a notch a<2>. Levers 1, 2, 3, 4, Fig. 5, having notches 1<e> of different depths are pivoted on a fixed member c and protected by a casing f. When the gate is open, the ends 1<a>, 2a, 3<a>, 4a of the levers are pressed into the slot a<1> by a spring g, and the handing rope cannot be moved. On closing the gate, the levers are disengaged from the bar by the projecting part d<1> which passes through the notch a<2>. When the handing rope is moved a part of the bar a which is not cut away passes into the notch d<2> in the part d<1> and prevents the opening of the gate. If it is attempted to unlock the levers by any article having a flat end, the projecting lower ends of some or all of the levers will engage the slot a<3> before all the upper ends are out of the slot a<1>. When the levers are used with a gateof a lift &c. actuated electrically, one of the leversis arranged to complete a circuit when the gate is closed which includes the ordinary switch of the driving gear, and the other levers are arranged to prevent the completion of such circuit if the lock is tampered with.
Patent GB-893799-A (GB)
Title: Improved opening and closing guide and locking means particularly for sliding door assemblages
Inventor: HARBORD FRANCIS
IPC: E05D15/06
Filed: 1959-06-29
Abstract: 893,799. Door fastenings; multiple fastenings; remotely controlled fastenings. AUTOZERO Ltd. June 15, 1960 [June 29, 1959], No. 22204/59. Class 44. A combined opening and closing guide and locking means for a sliding, door assemblage 1, includes a guide plate 15 having an arcuate slot 17 fixed to a stationary part 3 of the door assemblage for limited pivotal, movement, engagement means 11, 12 fixed to the movable part of the door assemblage for co-operation with the slot 17 and a pivoted locking plate 21 resiliently mounted to effect locking of the engagement means 11 at the inner end of the slot, the arrangement being such that to effect disengagement of the engagement means 11 with the slot, rotation is imparted to the guide plate 15. As shown, and as applied to a refrigerator, in which the door assemblage is moved between open and closed positions by an electric motor (not shown), the door 2, is supported for sliding movement on the part 3 at each of its two upper corners by an antifriction bearing pad 5 carried by a bracket 4. The engagement means fixed to the movable part comprises a pair of rollers carried by a plate 9 adjustably fixed to the door and the arrangement is such that as the engagement means enter the arcuate position of the slot 17, as the door is moved to closed position, the door moves in a plane transverse to that of the door, the locking plate 21 having been moved by the engagement means 11, 12 about its pivot 20 on the plate 15 against a spring 18. When the door is required to be opened, the motor is run in the opposite sense to cause pivotal movement of the plate 15 about its pivot 16 and misalignment of the engagement means 11, 12, pivot 20 and pivot 16, this to allow the engagement means to move out of the slot 17. The electric motor drives through a belt 25 which engages an eccentric pulley 26 mounted on the bracket 4.
Patent GB-764612-A (GB)
Title: Method of manufacturing articles of synthetic resinous material
Inventor: SHEPHERD RICHARD ARTHUR
Filed: 1954-07-30
Abstract: A part only of the surface of a metal insert is coated with a dissimilar metal, then the partly-coated insert is moulded with synthetic resinous material to form an article.  That part of the insert that is coated may be the exposed part, the uncoated part being buried in the plastic and forming a better bond with the resin than would be obtained between coated metal and the plastic. The insert may be made of high-conductivity brass (for making an electrical article through which the insert extends from one surface of the article to another) the exposed parts thereof being electroplated first with tin and then with cadmium; or one or both exposed parts may be hot tinned.  The resin may be phenolic.
Patent GB-1417794-A (GB)
Title: Muting circuits
IPC: G11B20/02
Filed: 1973-05-10
Abstract: 1417794 Transistor amplifier circuits SONY CORP 10 May 1973 [27 May 1972] 22345/73 Heading H3T The output at terminal 36 from an amplifier 11, deriving an input signal from terminal 38 is muted during switching on and off of the power from A.C. source 13 in order to avoid switching clicks. The power supply comprises transformer 14, full-wave rectifier 15 and voltage stabilizing circuits 18, 19 in the positive and negative supply lines respectively. Due to the time delay in stabilizing circuit 18, a supply voltage appears at terminal 16 before one at terminal 20; consequently transistor 35 receives a bias which renders it conductive to mute the signal output upon switching on, since transistor 25 is non-conductive until capacitor 32 has charged up over resistors 29, 30, 31. When transistor 25 becomes conductive, transistor 35 is biased to cut off. While the amplifier is operative, transistor 26 receives a negative bias on its emitter, from terminal 21, and so is conductive, to charge capacitor 28 negatively. When the supply is switched off, the emitter of transistor 26 goes to earth potential; the transistor cuts off, thereby biasing transistor 35 conductive and so muting the signal output. The arrangement may be applied to a stereo system (Fig. 2, not shown); also the transistor 35 may be replaced by a field-effect transistor with its sourcedrain path in series with the signal path (Fig. 3, not shown).