baber/WOPTO huggingface dataset:
Patent GB-462213-A (GB)
Title: Process for the preparation of silica for glass batches
IPC: C03C1/02
Filed: 1936-04-06
Abstract: To obtain pure silica suitable for use in the manufacture of glass which will transmit ultra-violet light, the silica in pulverulent form is added to an acid solution and the pulp, which is preferably heated, is agitated in the presence of a flotation oil comprising a sulphur derivative of cresol.  The iron impurities are floated off and the silica is then dried.  To reduce the iron content still further, e.g. to about 0,001 per cent calculated as ferric oxide, the silica may be washed on a concentrating table before or after the flotation treatment.
Patent GB-1422914-A (GB)
Title: Control circuit for electronic flash apparatus
IPC: G03B15/05
Filed: 1974-03-07
Abstract: 1422914 Flash control circuit FRANKE & HEIDECKE GmbH [trading as ROLLEI-WERKE FRANKE & HEIDECKE] 7 March 1974 [4 April 1973] 10347/74 Heading G2A In a flash control circuit an integrating capacitor 15 charged at a rate determined by a phototransistor 14 exposed to reflected light and eventually triggers a thyristor 8 whereby a capacitor 6 discharges through a transformer 5 to ignite a quench tube 4 and thereby short circuit the flash tube 3; a capacitor 17 being connected between the gate and cathode of thyristor 8 to act as a low impedance to interference signals and an inductance 18 and resistor 19 being connected in series across the capacitor 17 to compensate for the response delay of the thyristor 8 introduced by the capacitor 17; the time constant determined by resistor 19 and capacitor 17 equalling that determined by resistor 19 and inductance 18.
Patent GB-267345-A (GB)
Title: Improvements in or relating to motor horns
IPC: G10K9/18
Filed: 1926-04-20
Abstract: 267,345. Heilbronn, L. April 20, 1926. Warning horns.-Within a pneumatic horn 3 operated from a bulb 1 is incorporated an elestrically-operated diaphragm 5 supported so as to leave an annular clearance 9, the operating wires 8 being carried within the tube 2.
Patent GB-947803-A (GB)
Title: Improvements in or relating to lifting or loading apparatus
IPC: E02F3/38
Filed: 1961-03-22
Abstract: 947,803. Mobile load-handling devices. P. DERRUPPE. March 22, 1961, No. 10445/61. Heading B8H. [Also in Division El] Vertical swinging of a loading implementcarrying arm or arms 3 is or are controlled, on actuation of a ram 14, by a linkage system or systems 4, 7, 8, 10 pivotally associated as shown at 5, 6, 9, 11, 12 and 13. In a modified form the link 8 is connected to the link 4 between the ends thereof and the link 7 has a common pivotal connection with the link 8 to the link 10.
Patent GB-256999-A (GB)
Title: Improvements in apparatus used in the tuning of wireless circuits
IPC: H03J3/24
Filed: 1925-04-22
Abstract: 256,999. Aspden, R. L. April 22, 1925. Condensers.-The highfrequency circuits of a wireless receiver are controlled simultaneously by means of two or more condensers or variometers, or both which are so interconnected through high-ratio gearing that a small adjustment of the input-circuit control varies the tuning element in the plate circuit from maximum 'to minimum. As shown the condenser e, which may tune the input circuit, is connected by gearing f having a step-up ratio of 30 to 1 to a condenser g, which controls the tuning of the output circuit, or the intermediate high-frequency circuit in the case of supersonic reception. The plates of the condenser g may be of the form shown in Figs. 2, and 3, so as to still further increase the step-up effect of the gearing f. According tn the Provisional Specification the master control element may be continuously rotated by an electric motor or other means so that the natural frequency of the associated circuits is continuously changing from maximum to minimum.
Patent GB-660407-A (GB)
Title: Improvements relating to the incorporation of volatile medicaments, compounded perfumes and other volatile substances in synthetic plastics
IPC: A61L9/04
Filed: 1949-04-20
Abstract: A volatile medicament, perfume, disinfectant, insecticide or like substance is incorporated with a synthetic plastic such as a vinyl polymer or copolymer by dispersing the plastic in a plasticizer together with the volatile substance to form a mobile paste, and gelatinizing by heat the resulting paste in a confined atmosphere, the vapour pressure of the volatile substance in the paste being increased during the initial heating so as to be higher than in the confined atmosphere, and after equalisation of the vapour pressure in the paste and in the atmosphere by saturation of the atmosphere with the vapour of the volatile substance, the vapour of the volatile substance in the paste being, after gelatinization and during cooling of the paste, decreased below the vapour pressure of the volatile substance in the confined atmosphere.  The process may be effected by placing the paste in a shallow tray kept closed, but not hermetically, by a lid, the paste being heated and cooled from the bottom. According to examples: (1) a therapeutic bandage material comprises polyvinyl chloride, dibutyl phthalate, chlorinated paraffin wax, calcium stearate and methyl salicylate; and (2) a perfumed sheet comprises polyvinyl chloride, dibutyl phthalate, benzyl benzoate and compounded perfume.  Specification 599,237 is referred to.
Patent GB-672434-A (GB)
Title: Improvements in or relating to electric circuits
IPC: G01R1/30
Filed: 1950-04-28
Abstract: 672,434. Voltage control systems. PHILIPS ELECTRICAL INDUSTRIES, Ltd. April 28, 1950 [May 2, 1949], No. 10494/50. Class 38 (iv). [Also in Group XL (c)] A voltage adjustable as to sign and magnitude and balanced about the mean potential of the source 1 (and thus suitable for supplying symmetrical shift potentials to the plates of a cathode-ray tube) is obtained from the terminals 8, 9 of a bridge network R1-R4, adjustment being effected by variation of R4, the network elements R1-R4, which may be resistors, or impedances of equal phase angles, being so proportioned that the value of the expression 2R2R3/R1-R2-R3 lies within the range in which R4 is adjustable. A further expression is included in the Specification which must be satisfied if the voltage adjustment in the positive and negative directions are to be equal.
Patent GB-1277370-A (GB)
Title: Stretch fabric parachute canopy
IPC: B64D17/00
Filed: 1970-03-05
Abstract: 1277370 Parachutes IRVIN AIR CHUTE Ltd 5 March 1970 [17 March 1969] 10688/70 Heading B7G A parachute has a canopy A made at least in part from woven stretch fabric having all the threads in a given direction of stretch yarn and having an air permeability of 0-40 cu. ft./sq. ft./min. at zero tension in the given direction and 600-1000 cu. ft./sq. ft./min. at maximum tension without permanent set measured at ¢ inch water differential pressure. The canopy is formed from gores B each comprising panels D, E, F, G, of which at least panel D and preferably panels D, E and F are made of stretch fabric with the fabric warp lying in the direction of the arrows. Although the panels G may be of stretch fabric the time taken for the canopy to open is reduced by making them of conventional fabric. Seams between panels are of conventional type, Figs. 2-4 (not shown), and the main seams C, Figs. 5, 6 (not shown), enclose suspension lines L which are made longer than the main seams. The invention may be applied to ribbon and ring-slot parachutes.
Patent GB-1151968-A (GB)
Title: Insertion Apparatus for Inserting Account Cards into a Machine
IPC: G06K13/063
Filed: 1967-03-08
Abstract: 1,151,968. Selective printing; sheet, card feeding devices. SIEMAG FEINMECHANISCHE WERKE G.m.b.H. 8 March, 1967 [18 April, 1966], No. 10873/67. Heading B6F. An accounting machine having pockets (not shown) for reception of account cards 9, on which data is to be recorded in accordance with magnetically sensed indicia (not shown) on the account cards, is provided with a card-aligning device comprising a casing 10 which is associated with a card guide 5 through an arm 5<SP>1</SP> and spring 11 and which supports a pair of spring clips 1 provided with linings 2 adapted for co-operation with friction linings 6 fast with a lug 14 which is carried by the arm 5<SP>1</SP>. The arm 5<SP>1</SP> is abutting with a stop 12 against a control bridge 3 provided with rollers 4. To align an account card 9 the control bridge 3 is driven so that the rollers 4 move into engagement with the spring clips 1, whereby the guide arm 5<SP>1</SP> follows the control member 3 under the bias of spring 11 and draws the guide member 5 with it to align the account card against a fixed aligning bar (not shown), the guide member 5 being arrested by the edge of the account card 9. Continued movement of the control member 3 causes the rollers 4 to deflect the spring clips 1 into engagement with the friction linings 6 so as to move the guide member 5 back from the stop 12 by a distance which is smaller than the preceding forward travel of the guide member to relieve any stress in the account card 9 so that it may be fed into the accounting machine, when during the subsequent movement of the control member 3 the rollers 4 actuate a switch 15. On completion of the accounting card feed movement the spring clips 1 are released and the guide member 5 and guide arm 5<SP>1</SP> are restored.
Patent GB-1382680-A (GB)
Title: Motion picture projectors
IPC: G03B1/56
Filed: 1972-03-09
Abstract: 1382680 Cinematography EASTMAN KODAK CO 9 March 1972 [10 March 1971] 10976/72 Heading G2E In a cine projector having an aperture plate 12, a pressure pad 18 urged by springs 20 into contact with the plate 12, a movable film edge guide member 22 and a film advancing member 84, an actuating device 46 is provided to move the above components from a film projecting position, Fig. 2, to a retracted position, Fig. 4, for example during rewinding. As shown the film F moves perpendicularly to the plane of the drawings. The actuating device 46 includes a shaft 50, a disc 48 having projections 52, 106, three cams (only 92, 96 visible) co-operating with associated ramps (only 98 visible) and a compression spring 104 urging the shaft 50 and disc 48 towards towards the Fig. 2 position. The projection 106 carries a pivoted link to a solenoid 112. To move from the Fig. 2 to Fig. 4 position the solenoid 112 is energized. This partially rotates the disc 48 which moves with the shaft 50 to the right due to the cams riding up their ramps. This causes disc 90 to block movement of the film advancing member 84. Simultaneously arm 54 is lowered, pulling with it the film edge guide member 22 and also causing the projection 60 to move out of slot 62 in the pressure pad 18. The axial movement of the disc 48 in combination with the downward component of movement of the projection 60 pivots the pressure pad 18 away from the aperture plate 12. The projector may be fitted with a switch for use during film threading which senses when the film F has been fed through the gate. A link 66 attached to the projection 52 causes the retraction of the switch from the film path when the projector moves to the Fig. 4 position.
Patent GB-553947-A (GB)
Title: Improvements in electrical means for the multiplication of variable quantities
IPC: G06G7/163
Filed: 1941-08-28
Abstract: 553,947. Electrical multiplication. TELEFONAKTIEBOLAGET L. M. ERICSSON. Aug. 28, 1941, No. 11003. Convention date, July 5, 1940. [Class 106 (i)] In means for the multiplication of up to five factors, of which not more than two are represented by electrical voltages and the remainder, which are introduced as positions along up to three adjustable impedances, are represented by mechanical quantities, the resistance distribution of at least one of the impedances is non-linear, while a zero-indicating instrument controlling a wiper along another adjustable impedance is connected in a zero-circuit between said wiper and a position along one of the'aforesaid impedances, said impedances and the given voltages being arranged and connected to one another in such manner that a product is obtained as a position along the impedance controlled by the zero-indicating instrument. Functions of the five factors are entered as a pair of voltages E<SP>1</SP>, E<SP>2</SP> or E<SP>11</SP>, E<SP>12</SP>, and three variable impedances Y<SP>1</SP> Y<SP>2</SP>, Y<SP>3</SP>, or y<SP>11</SP>, Y<SP>12</SP>, Y<SP>13</SP>. The impedances are constructed with a high number of contact positions. A zero-indicating instrument N<SP>1</SP> or N<SP>11</SP>, for instance, a sensitive polarized relay preferably without a neutral position working with a servo-instrument varies the impedance Y4 or Y<SP>14</SP> for zero current. The solution of the problem is a function of Y' or Y14. The device may be used for the solution of problems in which the factors are continuously varying. The impedances may be variable condensers for use with alternating current.
Patent GB-702987-A (GB)
Title: Improvements in or relating to circular knitting machines
Inventor: SHORTLAND ARTHUR
IPC: D04B35/32
Filed: 1950-05-04
Abstract: 702,987. Expelling dust in industrial processes. MELLOR, BROMLEY & CO., Ltd. March 20, 1951 [May 4, 1950], No. 11040/50. Class 8 (2). [Also in Group VIII] During the operation of a circular knitting machine, a fan or fans rotate in a horizontal plane on the machine's central axis, to disperse fluff or lint, the fan or fans being driven, either from the machine or from an independent electric motor mounted thereon. The upper one 16 of two opposed fans blows upwardly and the lower one 15 blows downwardly. The fans may be carried on a tubular shaft 17, driven through a flexible shaft 22, from the dial driving gear 4 and rotating about a column 10 which bears a bobbin-supporting spider 11 and a disc 13 furnished with yarn guides 14, or with yarn controlled devices operating an electrical stop motion. In a multi-feed cylinder and. dial machine, the fans may be driven by an electric motor 29 supported, through arms 30 and uprights 27, on posts carrying a ring bearing bobbin-supports. Yarn controlled electrical stop-motion operating devices 25 are carried on a ring 26.
Patent GB-1460919-A (GB)
Title: Pumps
IPC: F04D1/04
Filed: 1974-03-13
Abstract: 1460919 Centrifugal pumps A BANYAI 13 March 1974 [5 July 1973] 11116/74 Heading F1C A centrifugal pump comprises a housing 12 containing at least one rotary impeller tube 70 coiled around the axis of rotation with a slope relative to a radial plane normal to the shaft which progressively decreases, e.g. from 40 degrees at the inlet 78 to 0 to 20 degrees at the outlet 80. Moreover, the cross-sectional area of the tube decreases, preferably uniformly, and its radial distance from the rotation axis increases in the direction of flow. Fluid discharged from outlet 80 passes into annular outlet chamber 82 in the opposite direction to the direction of rotation. Walls 36 provide additional support for the tube and, contrary to the construction shown, may be formed separately from the tube and bolted thereo. Dimensions of the pump are given in the Specification.
Patent GB-1172319-A (GB)
Title: Tyre Building Apparatus
IPC: B29D30/24
Filed: 1967-03-09
Abstract: 1,172,319. Tyre building drums. DUNLOP CO. Ltd. 9 March, 1967 [11 Maroh, 1966], No. 11129/67. Heading B7C. A tyre building drum comprises circumferentially-spaced sets of pivotally-linked segments 10, 11 movable to change the building surface from a cylindrical (dash-dot lines) to toroidal (full lines) condition. Cover plates (31, 32) (Figs. 10-15, not shown) are secured to the segments and the actual building surface is provided by a diaphragm 14. To expand the drum a screw shaft 40 is rotated to cause mutual axial approach of nuts 39 and hence symmetrical radial movement of links 23 pivoted thereon. The drum is adjustable for building differentsized tyres by (a) replacing flanges 16 by ones having a different radial height; (b) adjusting the axial spacing of flanges 16; (c) adjusting screw stops 13 on segments 11.
Patent GB-624859-A (GB)
Title: Improvements in or relating to electric commutators
IPC: H01R39/04
Filed: 1946-04-11
Abstract: 624,859. Commutators for dynamo-electric machines. WATLIFF CO., Ltd., and HINCHLIFF, A. O. April 11, 1946, No. 11160. [Class 35] A commutator has in the inner surfaces of the segments apertures so correlated as to extend in succession helically around the commutator axis and the segments are secured together by moulded material which flows into the apertures. Segments 10 with teeth 10a (which could be dovetail shaped) are placed in a former 13 (Fig. 12) with insulators between, this former having its base 12 so shaped that the bars occupy such relative positions that the teeth are in helical formation. The assembly is then separated from the base and after the ends have been cut off level an insulated helical spring is placed into the grooves between the teeth to reinforce the insulation, then moulded about the teeth. An alternative procedure is to arrange insulators 14 on the reinforcing spring 9 as shown in Fig. 15 and then place the segments in position and secure them by plastic insulation. As a further alternative, the commutator may be formed from a copper sleeve with a helical internal thread, axial cuts being made in the threads to provide separate teeth, the outer part of the ring being cut through to separate the segments after the moulding operation. A long sleeve or segments may be used to form several commutators simultaneously.
Patent GB-1281985-A (GB)
Title: Process for the production of oriented silicon iron by vacuum degassing and continuous casting
IPC: C21D8/12
Filed: 1970-03-09
Abstract: 1281985 Making silicon-iron sheet; continuous casting ARMCO STEEL CORP 9 March 1970 [14 March 1969] 11196/70 Headings B3A and B3F In a process of making grain oriented siliconiron sheet, the charge is tapped from an open hearth furnace into a first ladle to which is added aluminium partially to kill the steel. The charge is teemed into a second ladle with most of the slag retained in the first ladle. The silicon is preferably placed in the bottom of the second ladle before the charge is added. The melt is transferred to a vacuum degassing unit where minor additions may be made to obtain the desired chemistry in the steel. The silicon may be added in a degasser. After degassing, the melt is continuously cast and protection from oxidation, at least between a tundish and the mould, is given by a protective submerged entry tube and a powder cover of inorganic silicate (which also minimizes pick-up of hydrogen from mould lubricant) on the metal in the mould. The melting of the powder promotes its action both as a flux and lubricant between the melt as it solidifies and the mould. The solidified metal slab is slowly cooled by water spraying at a rate sufficient only to prevent damage to the metal, which may be rolled with residual heat, descaled, decarbonized, cold rolled and then annealed. In an alternative method a charge is tapped from an electric furnace into a ladle containing at least a substantial part of the silicon, the slag being minimized by known procedures. A preferred analysis of the metal is 2À5-40% silicon, 0À027-0À040% carbon, 0À04- 0-08% manganese, 0À020-0À026% sulphur or selenium, <0À004% oxygen, balance iron and impurities.
Patent GB-777999-A (GB)
Title: Improvements in or relating to window fittings
IPC: E05D15/52
Filed: 1955-04-19
Abstract: 777,999. Windows. FRANK, W. April 19, 1955, No. 11234/55. Class 20(3)  In a window 1, 2 wherein the sash 1 can be moved, optionally, about a vertical axis 16 on a horizontal axis 40, the movement about the horizontal axis is produced by rotation of a horizontal shaft 5 having an arm 14, 20 at its opposite ends. The shaft is carried by the stationary frame 2 and is operated from a handle 7 also carried by the frame 2. One' arm 14 is permanently connected to the sash 1 and the other arm 20 is detachably connected thereto by way of a pin 21 working in a slot along the arm. The pin is carried by a rod.35 slidably mounted in the sash; when the rod is raised, by rotation of another handle 37, the pin leaves the arm 20 and the lower end of the rod leaves a recess 38 in the stationary frame so that the sash can now be swung about the vertical axis 16, the first arm 14 being co-axial with this axis. When the rod 35 is re-engaged in the recess 38, the sash being closed, the construction of hinge 17-19 and the form of the bearing 35<SP>1</SP>, 38 are such as to permit swinging movement of the sash about the horizontal axis. In the case of a tall window an additional releasable pin and arm connection 25, 26 may be provided, the arm being spring biased to hold the sash normally tightly closed at that side the other side of the sash being held closed by part 46, 47. Other holding arrangements 41...45 and 48...54 are also provided.
Patent GB-255947-A (GB)
Title: An automatic safety shutter and motor control for picture projecting machines
IPC: G03B21/18
Filed: 1925-04-30
Abstract: 255,947. Harrison, C. F. April 30, 1925. Kinematograph apparatus.-In a projector driven by an electric motor, a sliding cut-off shutter is carried by a casing attached to the lamp house and is normally held open by a sliding rod; irregularities in the running of the film cause switches near the top or bottom sprocket to close, thus energizing an electromagnet to move the rod and release the shutter; the shutter, in falling, breaks the motor circuit. Fig. 3 shows a front view of the casing containing a shutter e sliding in guides f. A rod g sliding in guides h normally holds the shutter, and is connected to a lever pulled by a spring i into contact with the keeper l of an electromagnet k. The shutter carries a switch n in rubbing contact with an insulated bar o in the motor circuit, the bar being divided at its lower end so as to break the circuit when the shutter falls. The shutter may also carry a switch arm z which leaves contacts z<1>, as the shutter falls. to break the circuit of the electromagnet, and a switch bar e<1> which engages terminals e<2>, when the shutter has fallen, to complete the circuit of a lamp providing illumination for film repair. Fig. 4 shows a hood t which receives the film loop from the top sprocket, a roller v<3> on a spring- pressed arm v being provided to guide the film into the hood. The hood is lined with fibre, &c., and carries terminals u in the circuit of the electromagnet and pivoted blades r<1>, r<2> which, when the loop becomes abnormally large, are pushed into engagement with the terminals u to complete the circuit of the magnet and release the shutter. The film leaving the bottom sprocket passes under a roller carried by one arm of a lever and over a roller turning on the same axis as the lever. The other arm of the lever bridges contacts in the. circuit of the electromagnet when, owing to breakage or slackness, the film does not support the roller carried by the lever.
Patent GB-1038654-A (GB)
Title: Time interval computing means for computer-type golf games
IPC: G04F10/00
Filed: 1964-03-18
Abstract: 1,038,654. Golf games. M.R.SPEISER. March 18, 1964 [April 25,1963], No. 11343/64. Heading A6D. [Also in Division G4] The golf game described in Specification 915,346, which is referred to, is modified in that the time of flight of the ball-and hence its estimated range-is measured by using the impact of the club on the ball to initiate a predetermined number of non-uniformly spaced clock-pulses and by counting those clock-pulses that occur after the ball hits the net. As described impact of the club on the ball is detected by a microphone and starts the movement of a tape 37, Fig. 2, carrying non-uniformly spaced holes, 50, for one cycle. Impact of the ball on the net is detected photoelectrically and opens a gate whereby those holes 50 which have not yet passed a sensing head 44 are counted. The tape carries a zeroizing hole 48 and can also carry a second row of holes 51 for controlling the selection of slides which are projected on to the screen. In a modification (Fig. 4 not shown) the tape is replaced by a disc.