baber/WOPTO huggingface dataset:
Patent GB-384813-A (GB)
Title: Improvement in variable focus lenses
IPC: G02B7/10
Filed: 1931-12-22
Abstract: 384,813. Lens mounts. TAYLOR, M. H. and KAPELLA, Ltd., 104, Stoughton Street, Leicester. Dec. 22, 1931, No. 35382. [Class 97 (i).] In a photographic or projection lens system in which, by simultaneous variation of the positions of the lens members, the equivalent focal length can be altered without changing the position of the image plane, the means for varying the positions of the lens members comprises a fixed outer part and an inner part rotatable therein, both being provided with helical slots, the lens members being mounted in carriers disposed within the inner part and having pins passing through both slots. The lens combination shown comprises a front member a, b in a carrier c and a rear member d .. g in a carrier h, both axially and rotatably movable in the inner part k which is rotatably mounted within the part i fixed to the camera &c. The member k is provided with helical slots r, s, and the member i with helical slots t, u, and the carriers c, h are provided with pins p, q engaging in the slots r, t and s, u respectively. The member k can be rotated by a handle o. To obtain the correct movements of the lens members one or more of the slots must have varying pitch, and preferably one of the slots in the member k is so formed. In order to adjust the focus for objects at various fixed distances the outer member may be made in two parts i, j connected by screws x passing through one part and entering slots in the other, so that by loosening the screws the part j can be turned relatively to the part i to produce axial movement of the carrier h relatively to the carrier c.
Patent GB-1240011-A (GB)
Title: Antistatic synthetic resin shaped articles
IPC: C08L77/00
Filed: 1968-07-24
Abstract: 1,240,011. Antistatic films and filaments. TORAY INDUSTRIES Inc. 24 July, 1968 [27 July, 1967; 13 Oct., 1967], No. 35392/68. Heading B5B. An antistatic unidirectionally oriented film or filament comprises a melt-shapable synthetic resin in which are dispersed, as an independent phase, elongated particles of a polyether-polyamide block copolymer which contains 15-70% of the polyether component and preferably contains 34-150 ether linked 0- atoms per polyether block; the particles having their longitudinal axes substantially parallel to their direction of orientation and at least 80% thereof having an average diameter not more than 1À0 Á and a length: diameter ratio of at least 20; the ratio of the melt-viscosities of the block copolymer and synthetic resin at the melt-shaping temperature being preferably 0À9 -10; and the block copolymer: synthetic resin weight ratio being preferably such that the total polyether content is 0À1-20%. The film or filament is made by melt extrusion, the molten components being mixed for a period not exceeding 1 hour, and the extruded product is given an initial draft of at least 10. In the case of filaments these may be of Y cross-section (Example 1) or composite (Example 5). In examples the block copolymers contain polyethylene- or polyethylene-propylene ether units with blocks of poly - # - caprolactam, polycaproamide, polyhexamethylene diamine, and/ or poly - # - capryllactam. Synthetic resins exemplified are various nylons, polyethylene terephthalate and polypropylene. Comparative examples disclose similar products which do not fall wholly within all the conditions given above.
Patent GB-1213415-A (GB)
Title: Improvements relating to belt conveyors
Inventor: PAUL NICHOLAS CAMPBELL
IPC: B65G39/14
Filed: 1968-07-25
Abstract: 1,213,415. Clamps. DOWTY MEOO Ltd. 8 Aug., 1969 [25 July, 1968], No. 35511/68. Heading E2B. [Also in Division B8] A saddle for supporting a troughing idler roller assembly from a rigid stringer 14 of a belt conveyor comprises a body member 10 provided with a clamping plate 18 which is engageable by a flat cotter member 26. The plate 18 is pivotally. mounted on a bolt 19 and has a notch 29 for engagement with a pin 20. The cotter member 26 is slidable in a slot in the pin 20 but is captive by a peg (27) Figs. 2, 6 (not shown), which passes through a slot 28 of the cotter. The top of the body member 1 has a groove 16 to receive the hooked end 17 of the roller assembly. In fitting the saddle to the stringer, the cottor (26) is brought into line with the pin (20) Fig. 1 (not shown), while the notch 29 in the plate 18 is engaged with the pin 20. The cotter 26 is then swung round, Fig. 3, and is moved longitudinally thus forcing the cotter against the plate 18 as the peg (27) engages the edge of the slot 28. Adjustment for the dimensions of the stringer is by nuts 22, 23.
Patent GB-1013267-A (GB)
Title: Method and apparatus for reducing the thickness of strip material
IPC: B21B37/16
Filed: 1962-09-12
Abstract: 1,013,267. Rolling. GENERAL ELECTRIC CO. Sept. 18, 1962 [Sept. 19, 1961], No. 35518/62. Heading B3M. [Also in Division G3]  In a method of rolling strip material between a number of successive passes, the tension is measured between two successive passes and the roll pressure in the second pass is altered in response to the tension measurement in order to keep its value constant. For hot rolling strip, stands 1-7 are provided, the tension of the strip being sensed by devices 20 between the stands. The gauge of the strip is adjusted after stands 1 and 7 by X-ray gauges 18 and 24, gauge 18 controlling the screwdown of stand 1 while gauge 24 controls the speed of the rolls 9 and 10 of stand 7 and hence the strip tension. When the value of tensions sensed by any one of the devices 20 deviates from a fixed value, a signal is sent to the screwdrum of the following roll stand to cause adjustment of the tension to the desired value. Fig. 2 shows two such devices 20, each having a roller 34 urged against the strip by a motor 39 through gearing 38, 37, the motor exerting a constant torque. On movement of the roller due to variation in strip tension the armature of the motor 41 is rotated and the output from a rheostat 42 varies the excitation current of D.C. generators 46 and 46<SP>1</SP> to alter the screwdown of the stand. The final device 20, between stands 6 and 7 has its output fed to a motor 11 controlling the speed of the roller 9 and 10 of stand 6. A five-stand coldrolling tandem mill is described, using the same system. The lever 35 holding the roller 34 may have attached to it a core which moves in a coil to create a tension measurement and the gearing 37, 38 may be profiled to cause the roller 34 to exert a constant torque on the strip (Figs. 5 and 3, not shown).
Patent GB-1024727-A (GB)
Title: Method of fabricating semiconductor devices
IPC: H01L21/24
Filed: 1963-09-09
Abstract: 1,024,727. Semi-conductor devices. HITACHI SEISAKUSHO KABUSHIKI KAISHA. Sept. 9, 1963 [Sept. 7, 1962], No. 35521/63. Heading H1K. A gold sheet containing an active impurity (e.g. gallium) and having a ratio of effective diameter to thickness within the range from two to thirty is alloyed into the surface of a germanium body. The thickness of the gold sheet is preferably less than 0À3 mm. and the alloying temperature greater than 450‹ C.
Patent GB-894190-A (GB)
IPC: C25D3/12
Filed: 1958-11-06
Abstract: 894,190. Nickel-plating baths. HARSHAW CHEMICAL CO. Nov. 6, 1958 [Dec. 10, 1957; Aug. 25, 1958], No. 35629/58. Class 41. A nickel-plating bath contains nickel chloride, or sulphate or a mixture thereof together with two brightening agents, (a) an organic sulphonamide or sulphonimide, or sulphonate, containing aromatic or unsaturated aliphatic hydrocarbon groups, (b) an organic sulphur compound having the group -S-(CH2)n-CN or -S-O(CH2)n-CN, where n is 1 to 4 C atoms. Examples of (a) are: saccharine, trichlorodibenzene sulphonamide; nickel or cobalt dinaphthalene sulphonate, thiophene sulphonic acid, diphenyl sulphone; sodium vinyl or allyl sulphonate, vinyl sulphonamide. Examples of the thio-alkylene nitrile or thio-di-alkylene nitriles (b) are: thio-di-propionitrile, 1,2-bis- (# - cyanoethylmercapto) - ethane, cyanoethylthiourea, bis-(2-cyanopropyl)-sulphide. Coumarin or coumarin derivatives may be added, and also buffer agents, e.g. boric or formic acid.
Patent GB-1483931-A (GB)
Title: Slit mechanisms
IPC: G01J3/04
Filed: 1974-08-13
Abstract: 1483931 Optical slits VARIAN TECHTRON PTY Ltd 13 Aug 1974 [13 Aug 1973] 35646/ 74 Heading G2J A slit apparatus e.g. for a monochromator comprises a plate 2 e.g. of beryllium-copper alloy having opposed and spaced jaw sections 5, 6 and hinge means 12 integral with and inter-connecting the jaw sections 5, 6. To maintain the plate 2 flat it may be confined between two flat and parallel surfaces (22, 23), Fig. 2 (not shown). To change the slit widths a rotary actuator is connected at 29 to a spoked diamond-shape drive member 27 which is connected to the hinge means 12 via long, narrow control straps 34. In a modification Fig. 6 (not shown) the drive member is circular and the actuator is connected to the bridging sections 11. In another form of plate 2, Fig. 7 (not shown) the jaw sections lie between the drive member and the hinge means. In yet another form of plate 2, Fig. 8 (not shown) the slits are in lateral alignment and the drive member also functions as one of the hinge means. Each slit may be defined by jaw members attached to the jaw sections.
Patent GB-522219-A (GB)
Title: Improvements in machines for subjecting materials to tensile, compression, bending and hardness tests
IPC: G01N3/42
Filed: 1938-12-08
Abstract: 522,219. Testing physical qualities of materials. ARNTZEN, J. W. H. Dec. 8, 1938, No. 35859. Convention date, Dec. 9, 1937. [Class 106 (ii)] In machines for making tensile, compression, and bending tests, a differential gear is connected to the driving means and interposed between the load necessary for testing, and the machine part acting on the test piece. A driving motor 7 is connected to the casing 4 of a differential gear by gears 6, 5. Rotatable in the casing are planet wheels 8, 9 gearing with sun wheels 10, 11. The bevel wheel 10 is connected to the pendulum load 2 directly or through gears 12. The bevel wheel 11 is connected by transmission gears 13 with the member 1 acting on the test piece. Due to the differential gear there is equality of forces at the test piece and at the pendulum 2, and the inclination of the pendulum is a measure of the load on the test piece. For indicating the deformation of the test piece, an indicating device 14 is connected to one coupling member 15, the other member 15 of which is connected by gears 16, 17 with 'a shaft 18 connected to the wheel 11. The pendulum is provided with a load indicating pointer and a drag pointer, each of which carries an electric contact and when these are in engagement a circuit is closed and the coupling members 15 engage and the counting mechanism is operated. Upon slip of the tension grips the decrease of the load causes the contacts to separate and the coupling is broken. This prevents error in the reading of the instrument 14. In hardness tests the load is maintained at a predetermined value by switching off the driving motor 7.
Patent GB-155765-A (GB)
Title: Improvements relating to track brakes
IPC: B61K7/04
Filed: 1920-12-22
Abstract: 155,765. Fr÷lich, E. Dec. 11, 1913, [Convention date]. Arresting grips or frictional apparatus on permanent way; actuated or applied by weight of vehicle.-Braking-rails 1 are attached to supports 2 mounted on cranked parts of shafts 3 mounted in bearings 5 connected to the usual rails 5' preferably through springs 6. The ends of the rails 1 are bent away from the rails 5'. Normally the rails 1 rest on supports 7. In operation, the shafts 3 are turned by arms 8 and connexions to raise the rails 1 to the position shown in Fig. 3, so that the heads of the rails 1 contact with the sides of the wheels, the supports 2 tip, and the wheels run on the feet of the rails. The horizontal thrust of the supports 2 is taken by stops 4, Fig. 3, or by a tie-rod 13, Fig. 4, where a pair of rails 1 is provided to engage each wheel. The braking pressure depends upon the position of the shafts 3 which may be turned sufficiently to cause the wheels to be raised completely from the track rails 5<1>. The springs 6 take up shocks.
Patent GB-322343-A (GB)
Title: Improvements in automatic weighing machines for use in weighing powdered material
IPC: G01G13/00
Filed: 1928-12-06
Abstract: 322,343. Bauer, V. Dec. 6, 1928. Casings.-Relates to an automatic - feed weigher for use in weighing powdered material and of the kind in which the weighing-receptacle 10 is suspended between two beams 4 connected by a transverse member 5, the beams and a common weight-support being situated each within a separate dustproof compartment, and consists in forming the casing of the machine of two rectangular frame-members 1 to which the partition walls 7, 16 are attached. External walls 6 are also secured to the framemembers. Collars 9 coaxial with the knifeedges 3 are formed on the transverse member 5 and rotate with a small clearance within circular apertures 8 in the walls 7. The spindles 11 of the tipping-receptacle 10 project through elongated slots 14 in the walls 7 and are provided with cover plates 15 located in close proximity to the walls. Apertures 18, 19 connect the compartment containing the weight-support to the compartment containing the beams.
Patent GB-1438859-A (GB)
Title: Insulating panel
IPC: E04C2/292
Filed: 1973-07-31
Abstract: 1438859 Laminated "sandwich" panels SOC INDUSTRIA PROFILATI SOMAGLIA SpA 31 July 1973 36299/73 Heading B5N [Also in Division E1] Heat insulating panels comprising two metal sheets 2, 2<SP>1</SP> and a core 3 of insulating material, e.g. expanded polyurethane foam are provided at one end with a protruberance 4 of rectangular cross-section and at the other end with a cavity 5 to fixedly receive at least a portion of said protruberance 4, the protruberance 4 and cavity 5 not being completely faced with metal sheet, the upper edges 6, 6<SP>1</SP> of the panel being chamfered and the lower edges 7, 7<SP>1</SP> being cut stepwise with the vertical part of the step also being chamfered, the panels being mounted to a support 10 by a screw 9 passing through a hole 8 provided in the step portion 7<SP>1</SP> cut in the lower edge of the panel which is provided with the cavity. The screw 9 is preferably located in the cavity defined by the step provided with the hole 8 and the protruberance 4 when the latter is fitted into the cavity 5. A gasket or packing 12 is preferably provided between the vertical walls of the protruberance and the cavity to prevent water ingress.
Patent GB-783896-A (GB)
Title: Improved means for controlling the tension of travelling webs of flexible material
IPC: B65H23/06
Filed: 1954-12-15
Abstract: 783,896. Feeding webs. TIMSON, E. A. Dec. 15, 1955 [Dec. 15, 1954], No. 36315/54. Class 100(1) Mechanism for controlling the tension of a travelling web, of the kind comprising a band acting on a brake drum rigidly secured to a reel shaft, the band of which is slackened or tightened to adjust the web tension under the control of a roller engaging the web and automatically controlling the brake band, is characterized by two fixed plates adjacent opposite sides of the brake drum having recesses or open slots to receive a pin secured to one end of the band and wherein the opposite end of the band has a similar pin engaged in one of a pair of hooked extremities on a pair of members actuated upwards and downwards under the control of the roller engaging the web. As shown, a web B being unwound from a roll 1 carried by a reel shaft 3 is tensioned by a brake band 13 engaging a brake drum 6. The band 13 has a pin 12 at one end which engages the hooked ends 14b of a pair of members 14 pivotally secured by a pin 15 to an arm 16a of a bellcrank lever 16 which rockks about a pin 18. The opposite end of the band 13 carries a pin 12<SP>1</SP> which engages slots 11 in a pair of fixed plates 9 secured to a support 7. A connecting rod 20 is connected at one end to the other arm 16b of the bellcrank lever 16 and at the other to a lever 21 which is rocked by a shaft 22 carrying arms 23 which support a roller 24. The roller 24 is urged into contact with the web B. by a weight 27 slidable along an arm 26 secured to the shaft 22. Variations in web tension, acting on the roller 24, cause slackening or tightening of the band 13 to restore the tension to a predetermined figure. The band 13 may be manually actuated by a hand lever 19. If the web is to be wound up on the reel shaft 3, the belt 13 is secured at one end by engagement of its pin 12 in slots 10 and at its other end by engagement of its pin 12<SP>1</SP> in hooked ends 14a.
Patent GB-156159-A (GB)
Title: Improvements in radio transmitting apparatus
IPC: H03H2/00
Filed: 1920-12-31
Abstract: 156,159. Western Electric Co., Ltd., (Assignees of Akers, M. K.). Dec. 31, 1919, [Convention date]. Regulating transformers. - In a variometer for use in wireless apparatus the fixed coils 17, 18 are wound in parallel planes and connected in series with the coils 19, 20, which are also wound in parallel planes but are movable relatively to the coils 17, 18. Rotation of the coils 19, 20 varies the inductance of the coils 17, 18, 19, 20, and at the same time the coupling between the coils 4, 5 and the coils 19, 20. The spindle 22 which effects the rotation need not be centrally pivoted to the cylinder 25, so that for a given rotation the variation in coupling between the coils 4, 19 is not necessarily the same as that between the coils 5, 20.
Patent GB-996411-A (GB)
Title: Improved method of heat sealing surfaces together
Inventor: AGAR ROBERT LESLIE
IPC: B31B50/66
Filed: 1963-09-18
Abstract: 996,411. Seaming non-metallic sheet material. MARDON, SON & HALL Ltd. Sept. 4, 1964 [Sept. 18, 1963], No. 36657/63. Heading B5K. [Also in Division B8] Two surfaces of a box, one of which surfaces is coated with thermoplastic material having a low dielectric loss factor, are secured in face-toface relation by (a) either precoating the second surface with or interposing between the surfaces a substance having a high dielectric loss factor and compatible with the thermoplastic material, and (b) pressing the two surfaces together in a radio frequency field to heat the high loss factor substance and so plasticize the thermoplastic material to secure the surfaces together. The word " compatible " is used to mean that when the high dielectric loss factor substance and thermoplastic material are heated together, the molecules thereof readily integrate so that they flow as a single material.  Low dielectric loss factor materials are those whose loss factor ranges from 0.0001 and 0.001, e.g. polytetrafluoroethylene, polypropylene, polystyrene and high and low density polyethylene, and high dielectric loss factor materials are those with a loss factor of 0.1 upwards, e.g. polyamide, polyvinylidene chloride and polyvinyl chloride. In an example, a box is made of a blank of cardboard one surface of which is coated with polyethylene and the other surface is coated with a high dielectric loss factor substance, e.g. a varnish. The body portion of the box is first folded up and heat-sealed by a plunger and die mechanism including electrodes of a radiofrequency circuit so that the polyethylene coating lies on the inside of the box. The article to be packed is deposited in the body and a lid hinged to the upper edge of one of the side walls is folded down. Panels hinged to the remaining three edges of the lid are folded down and secured to the corresponding walls of the body by radio-frequency heating during passage through a tunnel.
Patent GB-938133-A (GB)
Title: Improvements relating to ion guns
IPC: H01J27/26
Filed: 1961-10-12
Abstract: 938,133. Ion sources. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Oct. 12, 1961 [Oct. 27, 1960], No. 36724/61. Class 39(1). An ion gun for space propulsion in which the ions are produced by the contact ionization of cµsium vapour forced through a heated porous wall has the porous wall constituted by porous (tungsten) pipes 2, Fig. 4, fixed in the front wall 3 of the gas pipe 1. The pipes 2 may extend through the wall 3 to various extents, Fig. 2. The front surfaces of the pipes 2, Fig. 4, lie in a spherical surface, but may lie in an ellipsoidal cone where a gun of larger perveance is used. The porous wall is heated by electron bombardment from a thoriated tungsten or tantalum filament 8 on the electrode 6. Electrons are also injected into the ion stream from the electrode 9 for neutralizing the ion beam. The gun system with beam forming electrode 5 constitutes a " Pierce " system.
Patent GB-1323318-A (GB)
Title: Doppler effect frequency monitoring system
IPC: H01S3/139
Filed: 1970-07-29
Abstract: 1323318 Lasers THOMSON-CSF 29 July 1970 [31 July 1969] 36794/70 Heading H1C [Also in Division GI] In an arrangement for comparing the frequency of a radio frequency signal E R , Fig. 2, with that of an electromagnetic wave E L  from an optical source such as a laser, the former is caused to modulate the latter in a crystal 9, the modulated beam is applied to a photo-cell 4 via a half silvered mirror 3 together with a Doppler reflection from a rotating reflective wheel 8, the photo-cell output is filtered to produce two Doppler frequencies related respectively to the two input waves, the lower frequency is multiplied by a factor K to obtain substantial equality in the two outputs, and they are compared to produce an error signal. The arrangement may be used to control a laser source frequency by means of a crystal controlled clock oscillator, or to control the frequency of an oscillator by the output from a laser.
Patent GB-994194-A (GB)
Title: A device for electrically determining the position of a structural element provided with a scale
IPC: G01G23/375
Filed: 1961-10-13
Abstract: 994,194. Determining position in one dimension photo-electrically; measuring electrically. J.HEIDENHAIN, [trading as WANCZLER & HEIDENHAIN.] Oct. 13, 1961 [Oct. 14, 1960], No. 36827/61. Headings G1A and G1N. [Also in Division H4] A device for measuring the position of a scale mark comprises at least three transducers sensitive to the mark or an image thereof, and means for sampling their outputs sequentially and cyclically to give a cyclic signal the phase of which is indicative of the position of the mark. If the transducers are photo-electric mark 20, Fig. 3, is a vapour deposited silver layer which reflects light through the lenses 29-36 to form images 22-28 which are viewed by photo-resistors or photodiodes 38-44. The photo-cells, have sensitive surfaces 1-7 Fig. 4a which are offset so that they are differently energized by images 22-28. The number of images necessary may be reduced by arranging the photo-cells in horizontal rows Figs. 7 and 8 (not shown). The photo-cell outputs are sampled by energizing them in turn by a ring counter 46, Fig. 5a, driven by a clock generator 45 to give a current waveform 49. This is smoothed by the decoupling circuit 48, 50 to give the waveform D, the phase of which indicates the mark position. Waveform D is squared by a Schmitt trigger 51 and differentiated at 52 to give positive and negative "pips". The latter are removed by a diode 53 and the former are used to trigger a flip-flop 54 to produce a square wave H whose phase is indicative of the mark position. Reference waveforms of opposite polarity B 1 , B 11  are produced from the ring counter and these are fed to the anodes of valves 59, 60; the wave H being applied to the grids. The current through a meter 64 linking the cathodes indicates the mark position. In a modification, Figs. 9 and 10 (not shown) the photo-cells are sampled in forward and reverse order in turn so that the spacing of pulse pairs indicates the mark position. The pulse circuitry of Fig. 5a is used and since it is the mark-space ratio of the signal H which indicates position, the phase reference signal is not used in demodulation. The mark may be magnetic, in which case the transducers are vapour deposited bismuth magneto-resistive layers or known Hall generators.