baber/WOPTO huggingface dataset:
Patent GB-829999-A (GB)
Title: Photographic printing process and apparatus
IPC: G03C5/02
Filed: 1956-09-06
Abstract: 829,999. Photographic printing processes. AGFA A. G. Sept. 6, 1956 [Sept. 7, 1955], No. 27357/56. Class 98(2) A printing exposure is made in two parts, the duration of one part exposure being at least 100 times shorter than that of the other part which is effected by less bright light. The brighter light provides a flatter gradation and thus if it predominates in the total exposure, the slope of the characteristic curve is generally reduced throughout. Characteristic curves 2, 3 and 4 were obtained when the exposure was shared approximately equally between an electronic flash lamp and an incandescent filament lamp. Curve 1 illustrates the use of the incandescent lamp alone, curve 5 that of the flash alone and curve 2 is the result of interposing a flash light exposure in the middle of an incandescent lamp exposure. When the negative to be printed is over-exposed, the toe of the characteristic curve 3 remains steep to give greater contrast in the high-lights than a flattened shoulder portion allows in the correctly imposed shadows of the negative. Curve 3 is obtained by making the flash light exposure near the beginning of the incandescent lamp exposure and curve 4 by making it near the end. When the negative to be printed is under-exposed the shoulder of the characteristic curve 4 remains steep to give greater contrast in the shadow than a flattened toe portion of the curve allows in the correctly exposed high-lights of the negative. In a contact printer (Fig. 3, not shown) the proportion in which the two lamps contribute to total exposure is varied by filters or diaphragms and, in another form (Fig. 4, not shown) the lamps are carried at the opposite end of a centrally pivoted arm.
Patent GB-261172-A (GB)
Title: Improvements in or relating to sliding windows
IPC: B60J10/04
Filed: 1925-11-02
Abstract: 261,172. Beaton & Son, Ltd., G., and Johnstone. W. E. H. Nov. 2, 1925. Holders for sliding windows.-To secure the horizontally-sliding window of a vehicle such as an omnibus or motorcar in an adjusted position, it is provided with a movable member having a locking projection acting at right-angles to the plane of the window, the projection engaging with any one of a series of sockets or perforations in a frame plate secured above or below the window. As shown, the movable member N secured to the window D is urged by a coiled spring mounted on its pivotal support so that a projection P engages with one of the perforations E in a frame plate A mounted above the window. The window is released by pressing the extension M and the fixed arm G between the fingers and thumb, when the window may be moved into a fresh position.
Patent GB-603385-A (GB)
Title: Improvements in mandrels
IPC: B23B31/40
Filed: 1945-10-19
Abstract: 603,385. Mandrels. PALOTSEE, J. J. Oct. 19, 1945, No. 27520. [Class 83 (iii)] An expanding mandrel has a number of arcuate shaped work - gripping members axially disposed around its periphery, the undersides of which are tapered and ribbed to slide upon and engage tapered projections on the shaft, loose collars on the shaft having bevelled faces resiliently to engage the bevelled ends of the work-gripping members, and one of them being actuated by an adjusting member on the shaft. The gripping members 2, having bevelled ends 2d, are shaped to slide on the inclined faces 1c of the projections 1b integral with or secured to the shaft 1, the projections being slotted axially to receive the guide-ribs 2a of the gripping-members. Loose collars 6, 8 maintain the assembly under pressure from springs 5, 11, a nut 7 adjusting the pressure on the gripping-members and a graduated and internally threaded sleeve 3 being the adjusting means for setting the external diameter over the work-gripping members. In a modification, the projections on the shaft are made annular and the bottoms of the slots are inclined to carry the gripping members, the under-faces only of the ribs being inclined to mate with the slots. The ends of the shaft are made suitable for use with a chuck.
Patent GB-941086-A (GB)
Title: A method for manufacturing xanthosine by fermentation
IPC: C12P19/30
Filed: 1961-07-28
Abstract: Xanthosine is prepared by cultivating at 20 DEG  to 40 DEG C. and a pH of 5 to 8 a guanine-requiring mutant strain of Aerobacter aerogenes in a nutrient medium comprising assimilable sources of carbon, nitrogen and inorganic salts and guanine, godnosine or guanylic acid in an amount less than that required for the maximum growth of the microorganism.  The guanine, guanysine or guanylic acid may be used in the form of their non-toxic salts (e.g. the hydrochlorides), or may be provided by materials such as yeast extract, fish extract or the acid hydrolysate of microorganisms. Concentrations of 30-100 mg./litre are preferred.  The mutant strain of Aerobacter aerogenes is preferably ATCC No. 14,304. Xanthylic acid, adenylic acid and inosinc acid are formed as by-products.
Patent GB-1401423-A (GB)
Title: Image presentation apparatus
IPC: G02B27/18
Filed: 1971-06-14
Abstract: 1401423 Optical apparatus BOARD OF GOVERNORS OF THE UNITED LEEDS HOSPITALS D M CRAVEN and O F CLARKE 31 Aug 1972 [14 June 1971] 27681/71 Heading G2J Image presentation apparatus comprises a headband 1, a cathode ray tube 8 and scan coil assembly 9 secured to the band 1, and an optical system 13, 15, 19 for projecting an image of a picture presented by the tube 8 in front of one of the eyes of the wearer. The parts 8, 9 are mounted in a cylindrical housing 7 pivotally attached to the headband 1, a lock 20 being provided. The optical system, which comprises mirrors 13, 19 and lens 15, is supported by the housing 7, and the mirror 19 may be fully or only partly reflecting.
Patent GB-730458-A (GB)
Title: Improvements in high pressure wound hollow bodies
IPC: F17C1/06
Filed: 1953-10-08
Abstract: 730,458. Making containers and tubes. RUHRSTAHL AKT.-GES. Oct. 8, 1953 [Nov. 4, 1952], No. 27722/53. Class 83 (2). A tube or container to withstand high pressure comprises a core tube a on which is wound edgeto-edge in a plurality of layers steel strip b formed on one side with longitudinal grooves d and on the other side with similar longitudinal ribs e, laterally offset relative to the grooves, the ribs and grooves of adjacent layers interlocking.
Patent GB-1106414-A (GB)
Title: Improvements in or relating to pressure fluid gauges
IPC: G01L19/00
Filed: 1966-06-22
Abstract: 1,106, 414. Pressure gauges. DRESSER INDUSTRIES Inc. June 22, 1966 [July 22, 1965], No. 27894/66. Heading G1C. In a fluid-pressure gauge the casing is divided by a thick wall 10 into one compartment, containing a pointer 44, a calibrated dial 36 and a crystal 32, and another compartment, containing the fluid-pressure actuating mechanism 72 and closed by a member 14 tapering in thickness towards its periphery and mounted on a resilient arm 18 so that in the event of an over-pressure occurring within the compartment the pressure is relieved by outward movement of the arm 18 and peripheral flexure of the member 14.
Patent GB-1140706-A (GB)
Title: Improvements in or relating to windshield cleaning apparatus
Inventor: HOWARD SHELDON JOSEPH
IPC: B60S1/40
Filed: 1966-06-22
Abstract: 1,140,706. Windscreen wipers. TRICO PRODUCTS CORP. 22 June, 1966 [24 June, 1965], No. 27986/66. Heading A4F. In a windscreen wiper apparatus the blade is oscillated relatively to the wiper arm during the wiping operation by an actuating rod 40, pivotally connected at one end to a bell crank lever 32 pivoted to the wiper arm 12 and secured to the blade superstructure 31, and having at the other end a bearing ring 50 engaging a stationary hub 70<SP>1</SP> arranged eccentrically to the axis of the wiper rockshaft 18. The hub 70<SP>1</SP> is secured to the spindle bearing the housing 20 by a screw 22<SP>1</SP> passing through an arcuate slot 73 in the hub 70<SP>1</SP> whereby the eccentricity of the latter may be adjusted to obtain a desired motion of the wiper blade relative to the wiper arm. In another embodiment (Fig. 2, not shown) the hub is not adjustable.
Patent GB-765922-A (GB)
Title: Improvement in knitting machine
IPC: D04B15/88
Filed: 1954-09-28
Abstract: 765,922. Knitting-machines. SCOTT & WILLIAMS, Inc. Sept. 28, 1954 [Oct. 7, 1953], No. 27996/54. Class 74 (2). In the knitting on a circular machine of a series of separate articles, each to be pressed off when completed, means of the general type disclosed in Specification 753,213 automatically grasps the initial part of such an article, but while said knitting thereof is interrupted, and thereafter imparts tension to the article during continued knitting thereof. After press-off and discharge of a completed stocking, a cam drum 23 causes cessation of knitting. A drum 82 is thereupon rotated, to raise, through a cord 74, a carriage 34 and associated fabric-grabbing cup and clamp elements 28, 66. The cup 28 is ultimately arrested by engagement of a member 54 with the lower race of a bearing 50 but the clamp 66 continues to rise, so opening the grab assembly. The machine now begins to knit on bare needles, to form and transfer, in conventional fashion, the welt, which is moved down into the cup 28 by blasts of air through openings in a dial 8. This done, knitting is again suspended, a detent 178 is moved out of a wheel 162, allowing the carriage 34 to drop to close the clamp 66 on the welt fabric and upper edge of the cup 28, knitting is resumed, and leg formation proceeds under tension of the weight of the grab take-up mechanism, subject to control of a counterbalance weight 158. Takeup tension is interrupted during heel formation, re-applied during foot knitting and again interrupted during toe formation, and during pressoff to allow the stitches to drop cleanly from the needles. Finally, the take-up drops to its lowest position and is opened and the stocking is discharged by an air blast. The stop-motion devices of Specification 753,213 are incorporated.
Patent GB-843731-A (GB)
Title: Improvements in hollow shafts with expandable diaphragms for supporting cylindrical cores
Inventor: FAIRCHILD HORATIO J
IPC: B65H75/24
Filed: 1958-09-01
Abstract: 843,731. Mandrels. UNITED STATES SHAFT CO. Sept. 1, 1958, No. 28060/58. Class 83 (3). [Also in Group XVI] A resilient sleeve 20 has portions thereof forced through openings 12 in an outer casing 11 so as to grip a core, not shown, placed on the casing 11. The sleeve 20 is secured in air-tight manner to an inner casing 14 by steel bands 21. The sleeve 20 is expanded by air pressure, through a pipe 16 having a non-return ball-valve 27.
Patent GB-363640-A (GB)
Title: Improvements in variable speed power transmission gear
IPC: F16H61/02
Filed: 1930-09-19
Abstract: 363,640. Variable-speed gearing. GRAHAME, C., 21, Brookland Hill, Hampstead Garden Suburb, London, and BOND, A. R., Ivanhoe, Woodlands, North Harrow, Middlesex. Sept. 19, 1930, No. 28078. [Class 80 (ii).] Relates to epicyclic variable speed gear of the kind comprising a double train of sun and planet wheels and in which a clutch operated by the centrifugal action of a governor is eased ,to allow torque slip by means of a two-part coupling, the parts of which undergo relative movement on overload. According to the invention the driving and driven shafts 4, 9 are provided with sun gears 5, 8 of relative sizes shown engaging with a planetary system 6, 7, 10, and a clutch having plates 12, 13 carried by the sun and planetary systems respectively is adapted to be operated by means of a centrifugal governor 17 carried by the planet frame 10 to press the plates 13 into frictional contact with the plates 12 by means of a lever 15 having an adjustable screw 16, while the driven shaft 9 is provided with a twopart coupling 18, 19 with an interposed compression spring 21, the part 18 being mounted in the shaft 9 by a quick-pitch screw 20, slanting dogs or the like whereby, when the load on the driven shaft 9 overcomes the spring 21, the part 18 is retracted, exerting a force on the governor 17 by a spring connection 23 to ease the clutch and allow torque escapement.
Patent GB-1318665-A (GB)
Title: Electromagnetic pickup cartridge
IPC: H04R11/12
Filed: 1971-06-16
Abstract: 1318665 Gramophone pickups J F GRADO 16 June 1971 [29 June 1970] 28160/71 Heading H4J A stereophonic gramophone pickup has a moving armature 46 (Fig. 1) which in its neutral position is sensibly out of the direct flux path of the profile of the air gaps between a magnetic plate 32 and four pole faces such as pole faces 16e, 18a while being in the fringe fields. The armature 46 moves in response to stylus motion to vary the reluctance of the two air gaps. A diametrically opposed pair of pole pieces 14, 16 have their axes in a plane at right angles to the plane of the axes of pole pieces 18, 20. The pole pieces 14, 16, 18, 20 have pole faces 14a, 16a, 18a, 20a (see Fig. 4) respectively. Coils 22, 24 on the pole pieces 14, 16 are in voltage adding and hum cancelling relation to each other, as are coils 26, 28 on the pole pieces 18, 20. The magnetic circuit includes a rear magnetic plate 30 serving as a pole piece support, a front magnetic plate 32 and an interconnecting permanent magnet 34. Four air gaps are thereby provided. A moulded plastics piece 40 includes a base 40a, a post 40b and an extension 40c (Fig. 3). A conical tip 40d carries a flexible pin 42 acting as a fulcrum for a stylus arm 44 (e.g. of plastics material or aluminium) which projects through an aperture 32b in plate 32. The armature 46 is frusto-conical and moves about a forward pivot P (Fig. 6) in response to stylus movement to vary the reluctance of one or two of the four air gaps. The armature 46 is adhered to a conical part 44a of the stylus arm 44 and is centred by an elastomeric member 48. The construction provides magnetic damping on the armature 46. In a second embodiment the pivot P is rearwardly of the armature, (146) Fig. 7 (not shown), and is surrounded by elastomeric material (148). The armature (146) is a right circular cylinder of magnetic material which, in its neutral position, is sensibly within the profile of the four air gaps. In a third embodiment (Figs. 8, 9, not shown) the single armature is replaced by a substantially cylindrical plastics carrier (246a) carrying four bar armatures (246a, 246b, 246c, 246d) at the requisite 45 degree orientation so that each is in proximity to an air gap, but in its neutral position is sensibly out of the direct flux path. The four bar armature construction is used where very low cross-talk is required.
Patent GB-445171-A (GB)
Title: Improvements in the manufacture and production of sulphur
IPC: C01B17/04
Filed: 1935-10-12
Abstract: Hydrogen sulphide is removed from gases containing it and converted into sulphur by passage together with sulphuric acid or a derivative thereof over catalysts at temperatures above the melting point of sulphur, preferably between 180 and 500 DEG  C. Suitable catalysts are vanadium, iron, manganese, chromium and their compounds especially oxides, alumina, bauxite, silica, e.g. silica gel, or aluminium silicates, e.g. kaolin.  Suitable derivatives of sulphuric acid include sulphur trioxide, fuming sulphuric acid or chlorsulphonic acid.  It is preferable to carry out the reaction first at temperatures between 300--500 DEG  C. and then to complete it at 200--300 DEG  C.  The sulphur may be removed by cooling it to the liquid state, and this sulphur separator may be arranged as a heat-exchanger to preheat the sulphuric acid and/or the gases containing hydrogen sulphide.  If this heat is insufficient e.g. when treating gases poor in sulphur, extra heat may be supplied by burning the gases or other combustible gases and leading the products of combustion, which may contain sulphur dioxide, into the evaporator for the acid or into the reaction chamber.
Patent GB-859098-A (GB)
Title: Method and apparatus for bending glass sheets
IPC: C03B23/027
Filed: 1958-09-03
Abstract: 859,098. Bending glass sheets. LIBBEYOWENS-FORD GLASS CO. Sept. 3, 1958 [Sept. 26, 1957], No. 28250/58. Class 56. In the bending of glass sheets in which the sheet is initially supported above a glass bending mould, the opposite longitudinal edges of the sheet are clamped during heating of the sheet to bending temperature and while the sheet is initially being bent, to restrain the sheet from lateral movement. The mould 24 comprising centre section 25 with rails 31, 32 joined by struts 33 hinged at 27 to end sections 26 comprising U-shaped rails 34 pivoting to closed and open positions by rods 28 supported in links 29 on pins 30 secured in brackets 23 on the sides 22 of the frame 20. The sheet engaging members 35 are mounted on rods 42 fixed to the centre section rails 31, 32 so as to extend inwardly of the end sections 26, each member 35 being mounted by a rigid bearing 41 inwardly of its centre of gravity and held vertical by a stay rod 46. As shown in Figs. 5 and 9 each member 35 comprises a L-shaped block with a bearing surface 37 and locator surface 38, the flat sheet 39 being supported on surfaces 37 and the ends A of the rails 34 and the weight of the sheet causing the blocks 36 to pivot about the rods 42 till the locator surfaces 38 firmly clamp the edges 40 of the sheet as in Fig. 9. By using different positions of the support points of the end sections 26 on the rods 28, the clamping force may be kept constant or caused to progressively decrease as the weight of the sheet is taken by the rails 31, 32 until the sheet is removed from the blocks 36 as the end sections 26 pivot the final closed position. In the alternative sheet engaging member 35 shown in Fig. 6, the sheet 39 is supported directly on the bearing 41 and a retainer or locator plate 48 is mounted in a plane offset from the centre of the bearing. Specification 869,100 is referred to.
Patent GB-1042558-A (GB)
Title: Improvements in or relating to pulse correction circuits
IPC: H03K4/94
Filed: 1965-07-05
Abstract: 1,042,558. Pulse shaping. SIEMENS & HALSKE A.G. July 5, 1965 [July 6, 1964], No. 28307/65. Heading H3T. The slope of the leading or trailing edge of a pulse applied to the base of a transistor is varied by feeding back the collector voltage through a capacitor, diode and variable resistor to the base, the junction between the capacitor and diode being connected to the emitter. In Fig. 1 telephone dialling A.C. pulses from an amplifier with A.G.C. are fed through transformer U and full-wave rectifier G1, G2 to the base of the transistor whose collector current operates a relay I. The leading edge of the pulse discharges C 3  and applies negative feedback through G3 and R 4  to the base to delay the rise of the pulse. Similarly the trailing edge charges C 3  through G4 and R 4  to apply negative feedback to delay the fall of input potential. Thus by adjusting the tap on R 4  it is possible to alter the effective length of the pulse, i.e. the time between energization and release of the relay, to compensate for changes in pulse-length produced by other parts of the transmission system. The slight increase in transit time can be compensated by connecting G3 directly to the base (as in the broken line) thus introducing a permanent delay at the end of the pulse. Different capacitance values can be switched in for C 3 . R 1  prevents the feedback voltage from being shunted by the rectifier circuit G1, G2, C 2 . R 4  may be provided with a calibrated scale for reproducible setting. The operate and release valves of the relay I may also be adjustable.
Patent GB-476201-A (GB)
Title: Improvements in and relating to the form and construction of teeth for saws
IPC: B23D61/12
Filed: 1936-10-20
Abstract: 476,201. Saws. BALFOUR, R. A., and HALE, F. H. Oct. 20, 1936, No. 28477. [Class 145 (ii)] Saw teeth of constant pitch are reduced in depth and the angle 2a ... 2d including their cutting portion is increased, individually or by groups, progressively towards the end of the blade at which cutting commences, so increasing the strength of the teeth at this end. Fig. 1 shows one form in which the leading-edges 1a ... 1d of the blade are parallel, and Fig. 2, another form in which the angles made by the leading-edges 3a... 3d vary progressively in relation to the verticals passing through their bases. The progressive reduction in depth may commence at any point of the saw, or may extend over its whole length.
Patent GB-499908-A (GB)
Title: Improvements in or relating to insulated electric conductors
IPC: H01B3/28
Filed: 1937-10-20
Abstract: Among other rubber compositions for insulating electric conductors is described a fire-resistant composition comprising 25 parts by weight of rubber, 12 parts of light basic magnesium carbonate, 20 parts of zinc oxide, 5 parts of selenium, 0,15 parts of sulphur, 1 part of anti-oxidant, 0,2 part of accelerator, 2 parts of softener and 34,65 parts of inert filler.
Patent GB-290904-A (GB)
Title: Anti-dazzle means for motor vehicles
IPC: B60Q1/068
Filed: 1927-10-27
Abstract: 290,904. Schaer, O. A. Oct. 27, 1927. Controlling consuming devices. - In an antidazzle arrangement for vehicle lamps, a rockable or slidable operating lever located adjacent the driver's seat is adapted to act as an electric commutator for simultaneously extinguishing the offside head lamp 22 and lighting the side lamps 24. The near side lamp is dipped by the operating lever simultaneously with the switching operation. In the form shown, a two-arm rocking lever 5, 7 is pivoted at 4 to a body 1 mounted on the dashboard 3. The arm 7 carries a spring contact adapted to engage sheet-metal terminals 18, 19 which are separated by a gap 39 and insulatingly screwed to the body 1, the arm 7 being held in its normal position by means of blade springs 8. Fig. 5 shows the diagram of connections in which a switch 30 controls the headlamps 13, 22, and a switch 31 enables the side lamp 24 to be lit irrespective of the positions of the switch 30 and the lever 5, 7. In a modification the springs 8 may be adapted to function also as the commutator.