baber/WOPTO huggingface dataset:
Patent GB-683659-A (GB)
Title: Improvements in or relating to photographic lens systems
IPC: G02B13/00
Filed: 1951-01-09
Abstract: 683,659. Optical lens systems. LEITZ GES, E. Jan. 9, 1951 [Jan. 9, 1950], No. 592/51. Classes 97 (i) and 98 (i). A photographic objective comprising two components, each of the shape of a negative meniscus concave towards each other enclosed between two positive components, the first and at least two of the other three components being composed of a positive and a negative element is characterized in that the refractive indices of all the positive elements is greater than 1.65 and that between the elements of the first member is an air space in the shape of a positive meniscus, concave to the object and of an axial thickness not greater than 5 per cent of the focal length of the objective. Where some of the glasses used contain radio-active material, to prevent the radiation therefrom reaching the photographic film a plane parallel plate of absorbing glass containing lead may be inserted before the film or the last lens of the objective may be formed of such glass. Data are given for one example of the lens shown and for one example of a similar lens having a meniscus shaped airspace between the elements of the second component.
Patent GB-537924-A (GB)
Title: Improvements in and relating to sun compasses
IPC: G01C17/34
Filed: 1940-01-11
Abstract: 537,924. Sundials. FORSTER, C. M. Jan. 11, 1940, No. 661. [Class 139] [Also in Group XX] In a sun compass for use on transport units the apparent time for a given latitude is indicated on a time scale by the intersection of an ellipse and a confocal hyperbola, means being provided for correlating the indications with a date indicator. The ellipse and hyperbola are determined respectively by the formulae where # is the latitude, a is a constant and h is the time in hours from apparent noon. As shown, a protractor A is mounted on gimbals, with its 0‹-180 degrees diameter parallel to the axis of progression of the transport unit. A vertical gnomon projects from the fixed pivot pin C of the protractor. A time scale E, a shadow pointer K and an elongated date scale D are pivotally mounted about the pin C, and the time scale may also be slid along the date scale to set the date against an index mark E<SP>1</SP>. The time scale bears a series of ellipses E<SP>2</SP> referring to various latitudes, and the ellipses are intersected by confocal hyperbola to graduate the ellipses in hours. The date scale D is engraved with a North-South line D'. After setting the time scale E and date scale D at the required date the two scales may be locked to the protractor A at the required azimuth by means of a clamping nut beneath the dials. The shadow pointer K is adjusted by hand at frequent intervals to indicate the correct apparent time and facilitates the maintenance of the shadow of the gnomon thereat under working conditions.
Patent GB-1165721-A (GB)
Title: Agricultural Spray Device
Inventor: HARRIS DAVID ALAN
IPC: A01M7/00
Filed: 1966-01-06
Abstract: 1,165,721. Spraying devices. IMPERIAL CHEMICAL INDUSTRIES Ltd. 13 Dec., 1966 [6 Jan., 1966], No.664/66. Heading AID. A spray shield for protecting crops when spraying between rows comprises a plate 1 provided with a shoe portion 6 for running in the ground the plate being pivotally connected to the spraying machine by a two rod 9 and a lifting chain 4. A pair of plates may be provided between a spray nozzle and may slope towards the nozzle and be joined at the upper edges.
Patent GB-1087271-A (GB)
Title: Method of producing an electrical component
Inventor: PARKINSON NOEL PERCIVAL
IPC: H05K3/20
Filed: 1965-01-07
Abstract: 1,087,271. Printed circuits. MOORE REED & CO. Ltd. Jan. 7, 1965, No. 666/65. Heading H1R. In a method of making a flush-bonded printed circuit of the kind in which a conductive pattern is formed on a temporary support and a layer of resin material is applied to the pattern and cured to form a permanent insulating support, after which the temporary support is removed, shrinkage of the resin material during curing is compensated by the provision of raised areas on the temporary support in register with the conductive pattern. As shown, Fig. 5, a plate 1 of etchable metal e.g. Cu, Ni, brass, has raised portions 4 of similar metal deposited thereon by electro-deposition through a photographicallyformed plating-resist mask (not shown). A layer 5 of non-etchable metal, e.g. Au, Ag, Rh, is then deposited, followed if required by a layer 6 of Cu or Ni. The resist is removed, and the layers 4, 5, 6 may be coated with adhesive. A number of sheets 7 of resin-impregnated paper or glass fibre are then applied to the layers 4, 5, 6 with heat and pressure. As the resin cures it shrinks back until it is level with the interface of layers 4 and 5. Finally plate 1 and layer 4 are etched away, leaving layer 5 as the exposed layer of the flush-bonded circuit.
Patent GB-554254-A (GB)
Title: Improvements relating to flange joints in chemical apparatus
IPC: F16J15/10
Filed: 1942-01-16
Abstract: 554,254. Pipe joints. SOC. OF CHEMICAL INDUSTRY IN BASLE. Jan. 16, 1942, No. 669. Convention date, Jan. 16, 1941. [Class 99 (i)] [Also in Group XXVI] Flange joints for pipes in which the lining consists of plates 5, Fig. 1, of refractory material, are provided with uninterrupted packing-surfaces 8, which serve as seatings or supports for the packing 10 and bridge the joints of the lining, as shown in Fig. 5. The packing - surfaces are formed from plastic material, such as a cement of waterglass ; artificial resin, or bitumen which is moulded into recesses in the lining-plates, or the pipe wall 1, Fig. 3, or partly in the shell and partly in the lining, as shown in Fig. 4. The surfaces 8 are preferably provided with grooves to receive the packing.
Patent GB-1449431-A (GB)
Title: Gaskets
IPC: F16J15/12
Filed: 1974-01-17
Abstract: 1449431 Gaskets ENGINEERING COMPONENTS Ltd 17 Jan 1975 [17 Jan 1974] 698/75 Divided out of 23141/74 co-pending Addition to 1278321 Heading F2B Eyelets 3, 3A are interrupted at 30, so as not to overlap the metal reinforcing member 15 of the parent Specification.
Patent GB-1045361-A (GB)
Title: Improvements in or relating to sheet casting
IPC: B29C48/08
Filed: 1964-01-07
Abstract: 1,045,361. Sheet casting. STOCKHOLMS SUPERFOSFAT FABRIKS A.B. Jan. 7, 1964 [Jan. 9, 1963; March 18, 1963], No. 748/64. Heading B5A. [Also in Division B2] In a sheet-casting apparatus an endless belt 1 in the form of a screen or lattice, receives a viscous plastic material, e.g. a plastisal from a hopper 4, provided with a doctor knife 5. The material passes by gravity through the openings in the belt to form projections or ribs and is gelled by the action of heaters 6 and 7 before being stripped by a roll 10 and passed to a receiving roller 9. The belt 1 passes through a bath 12 containing a release agent and is preheated by a heater 8. In a modification, the sheet is provided with a backing of fabric which is fed from a roll on to the material on the belt 1. The fabric passes below and receives paste from a second hopper. A shield in the form of an endless belt passes between the heaters and the belt so that sections of the sheet being cast gelatinize at different speeds. To the same effect, the heaters may be located at varying distances from the belt 1 or be operated periodically.
Patent GB-638603-A (GB)
Title: Hair waving appliances
IPC: A45D6/04
Filed: 1948-01-09
Abstract: 638,603. Hair-waving appliances. HARDY, C. F. Jan. 9, 1948, No. 792. [Class 131] A device for winding hair on a curler comprises a frame 1, means for detachably mounting the curler 5 in the frame, a member 10, slidably mounted on the spindle 4 and to which a hair guiding member 11 is attached, and mechanism operated by the driving means to cause the sliding member 10 to reciprocate on the spindle 4. The curler 5 is removably supported between the spring-biased spigot 6 and the spindle 4 which is driven by the meshing pinion wheels 21, 20 when the shaft 18 is rotated by turning the crank handle 19. The rod 12 passing through a guide slot 13 in the frame 1 causes reciprocation of the member 10 and hair guiding member 11 by the throw of the crank arm 15 and the meshing of pinion wheels 16, 17. The Provisional Specification describes a form of the device in which the guide member 11 is replaced by a rotating cranked member, which intermittently presses against the hair as it is wound. and a rotating brush.
Patent GB-251903-A (GB)
Title: Improvements in or relating to cigarette cases
IPC: A24F15/20
Filed: 1926-01-11
Abstract: 251,903. George, E. A. Jan. 11, 1926. Contents, facilitating access to; fittings, internal. -In a cigarette case wherein the cigarettes are held in a support which, to facilitate removal of the cigarettes, can be inclined relatively to the walls of the caso by a tongue-piece 10, the support is fluted to form seatings for the individual cigarettes and a metal strip 4 is hinged at one side to the support to retain the cigarettes in position. The strips 4 may be replaced by a wire loop, and preferably two supports 1 are provided, the support in the one compartment being hinged about the opposite edge of the case to that in the other compartment.
Patent GB-196047-A (GB)
Title: Improvements in or relating to motor car head-lights and like lamps
IPC: F21V11/16
Filed: 1922-01-10
Abstract: 196,047. Wade, H., (Garth, G. A.). Jan. 10, 1922. Lantern obturators. -In a motor head light or like lamp having a reflector, a screening- device is provided closely adjacent to the lamp-bulb and has a forward and upper curved shield-like portion for intercepting a part of the upwardly projected direct rays, and a rearward shield-like portion for intercepting the light which would be reflected upwardly with or without wing-like side portions diverging forwardly from the rear along each side of the bulb. The rearward portion is placed above or below the lamp-bulb, according as the beam produced is converging or diverging. The forward portion, in one form, comprises a hollow semi-cone 17 situated in front, and mainly above the level of the lamp filament with the apex of the cone directed forwardly, and is connected by thin resilient strips 18 to the lower rear portion 19 which is, like the lamp-bulb 14, spherical in shape but extends round less than half the circumference of the bulb. The flat side wings 20 have their upper edges situated just above the lamp filament and their lower edges just above the lower rear portion and, with this portion, are attached to a spring member 21 which clips on the lamp-bulb stem. Recesses may be formed in the lamp-bulb to co-operate with corresponding parts in the spring clip 21 to prevent rotation of the device. The inner surface of the device may be polished or enamelled, or otherwise made reflecting.
Patent GB-660885-A (GB)
Title: Improvements in and relating to bituminous compositions
IPC: C08L95/00
Filed: 1949-01-12
Abstract: A bituminous composition comprises asphalt and 5 to 95 per cent of a polymer of a substituted or unsubstituted unsaturated nitrile or an interpolymer of two or more such nitriles.  The nitriles are of the general formula <FORM:0660885/IV (a)/1> where R may be hydrogen, a hydrocarbon radical or chlorine or bromine, e.g. a -methyl, ethyl, butyl, b -propyl, or a ,b -dimethyl acrylonitriles, crotonitrile, a - phenyl, naphthyl, chloro, bromo, or a ,b -di-chloro or cyclohexyl acrylonitrile, or <FORM:0660885/IV (a)/2> , where <FORM:0660885/IV (a)/3> may also represent a phenylene, cycloalkylene or pyridine ring, are used.  A solution of the composition in, for example, ketones, aromatic and aliphatic hydrocarbons, and brominated or chlorinated hydrocarbons or an aqueous dispersion thereof, which may contain stabilizers, caseinates or alginates, soluble alkaline hydroxides, e.g. alkali or alkaline earth metal or ammonium hydroxides or quaternary nitrogen bases, clay, anion or cation active emulsifiers, e.g. alkaline solutions of metal salts or soaps of tall oil, alkali metal rosinates, sodium lauryl sulphate, sodium oleate, or ammonium stearate, may be used as coatings for asphalt roadway compositions including those containing natural rubber or polymers of diolefine hydrocarbons.  Plasticizers, e.g., butadiene-methacrylonitrile copolymers, fillers, waxes, cation active materials, resins or phenyl b -naphthylamine may be included in the composition.  Cloth, paper, concrete, bricks, glass, porcelain, ceramics, sand, clay, bentonite, carbon black, and particles of rubber may be impregnated or coated and may be fixed and impermeabilized by addition of ethyl formate to the aqueous dispersion.  Specification 638,507 is referred to.
Patent GB-827667-A (GB)
Title: Improvements in or relating to arrangements for recording on and/or reproducing from a magnetic recording medium
IPC: G11B5/55
Filed: 1957-01-09
Abstract: 827,667. Magnetic recording apparatus. GENERAL ELECTRIC CO. Ltd., BENT, G. V., and PEMBERTON, R. C. Jan. 1, 1958 [Jan. 9, 1957], No. 888/57. Class 40 (2). In a magnetic record apparatus a transducer is selectively moved by a motor-driven mechanism to engage one of a plurality of parallel tracks in accordance with a particular switch contact associated with a desired track. In the embodiment described a transducer 1 may be moved transversely to a record member 2 by a lead screw 5 driven by a reversible motor 7. The lead screw 1 may be locked in any one of a number of quarter-turn positions by a recessed disc 6 which is engaged by an armature 10 of an electromagnet E. A traversing movement of the transducer carriage 3 is produced by the closing of the earth circuit of a set of contacts 17. If circuit is completed through plate 14, a forward drive of the motor 7 is effected, during which the electro-magnet E disengages the armature 10 from the disc 6. When the plate 14 leaves the operative contact 17 the circuits are broken, and the lead screw 5 again locked in position. If, however, a circuit is completed through plate 15, a reverse drive of the motor is effected. Again the circuits are broken when the operative contact 17 reaches the space between plates 14 and 15.
Patent GB-628624-A (GB)
Title: Metalic tubing for heat exchangers
IPC: F28F19/06
Filed: 1947-01-10
Abstract: 628,624. Tubes for air and gas heating stoves. AKT.-GES. FUR TECHNISCHE STUDIEN. Jan 10, 1947, No .897. Convention date, Jan. 14, 1946. [Class 64(i)] A metallic heat transfer tube, for use in heaters for gases under pressure in which the temperature of the tube walls is 1,000‹F. or higher and the stress in the metal of the tube walls is 2,500-5,000 lbs./ sq. in., comprises a stress resisting core 6 of an alloy steel (such as stainless steel) having good creep resistance and also a thin envelope 9 composed of an alloy steel (e.g. containing 20-30 per cent chromium) having good resistance to the corrosive effects of slag and combustion gases. Furthermore, the envelope is not united with the core but is in close contact with it at atmospheric temperatures and has a coefficient of thermal expansion materially lower than that of the core 6 so that at operating temperatures it is stressed and good heat transfer is assured. The envelope may be strip-wrapped around the core and locked at its edges in a longitudinal seam (not shown) or may, as shown, be a strip 9 helically wound with a slight overlap 11 at the edges and preferably tack-welded to itself at intervals as at 12 to accommodate minor flexures of the core. The envelope strips are approximately 0.01 in. in' thickness and may be replaced, if burnt out, without removal of the tube 6. Specification 468,287, [Group XXVI], is referred to.
Patent GB-1135371-A (GB)
Title: Improvements relating to a photographic transfer process
Inventor: RIEBEL ALEXANDER
IPC: G03C5/04
Filed: 1966-01-07
Abstract: 1,135,371. Photographic transfer process. AGFA-GEVAERT A.G. Jan . 7, 1966 [Jan. 8, 1965], No. 900/66. Heading G2C. Relief images of a light-absorbing original on a light-reflecting background are formed by exposing to the original, by means of a high intensity flash, a copying layer which contains a pigment or dye which converts visible light to heat, and a film-forming binder which hardens when heated to 50 -300 C., treating the exposed layer with a liquid to cause the unexposed parts to swell, and contacting the layer with a receiving sheet thereby transferring a positive relief image. An electronic flash of 300-5, 000 Joules and an exposure time of 10<SP>-2</SP>-10<SP>-4</SP>secs. may be used. The binding agent may be gelatine, polymers containing polymerized units of N-methylol ethers or esters of methacrylamide or acrylamide, and polyacrolein acetal. The binder may also contain hardening agents. Specified pigments are carbon black, graphite, heavy metal oxides and sulphides, and finely divided Ag, Bi, Pb, Fe, Co or Ni. The dye may be an azo-, formazone-, cyanine-, triphenyl or diphenyl methane-, or indigoid dye. Examples 4 and 8 relate to azo-dyes which decompose to form a vesicular image in the layer The total pigment and/or dye concentration may be 0.01-1% by wt. Inert binders e.g. polyvinyl alcohol or polyvinylpyrrolidone may also be included in the layer. Specified liquids for causing the swelling are CH 3  OH and H 2  O.
Patent GB-563024-A (GB)
Title: Improvements in or relating to portable food containers, ovens, refrigerators and like portable food receptacles
IPC: A47J41/00
Filed: 1943-01-18
Abstract: 563,024. Insulated food receptacles. HOPKINSON, G. H. Jan. 18, 1943, No. 917. [Classes 29 and 64 (ii)] [Also in Groups VI, XI and XVII] A portable food receptacle comprises a vertical cylinder 10 with detachable cover 12, having double walls enclosing heat insulation 14. A metal frame comprising unsymmetrically spaced vertical supports 22 with cross members 24, 25 is carried by the cover and is provided with perforated platforms 26 detachably carried by. clips 28. A pivoted handle 30 has hooks 32 adapted to engage lugs 34 on the receptacle when the frame is inserted within it. A panel 38 of transparent material is provided on the side of the cylinder 10 for inspection of food receptacles on the platforms 26. An electric heater 40 controlled by a switch 41 may be provided at the bottom of the cylinder, and an electric lamp 42 may also be provided for heating, and for illumination. A pan of water may also be provided at the bottom. A section of the wall of-the cylinder 10 may be removable so that the cylinder may be placed. before a fire to heat the food in the container. Food may also be kept cool in the container, and a freezing mixture may be provided within it for that purpose.
Patent GB-821267-A (GB)
Title: Improvements in or relating to snap action electric switches
Inventor: REYNOLDS ERNEST ARTHUR
IPC: H01H13/28
Filed: 1957-01-10
Abstract: 821,267. Retractive switches. VIGILANT SWITCHGEAR Ltd. Jan. 10, 1958 [Jan. 10, 1957], No. 936/57. Class 38 (5). A snap-action switch, e.g. a limit switch, comprises a blade 10 carrying contacts 11 and bowed into the position shown by a pair of tension springs 15, the blade being biased upwards at its centre, so that contacts 11, 13 are normally closed, by a return spring 33. The blade is secured to an operating member 16 which also carries a plate 21, and which is shaped to seat an operating ball 31 which projects through but is captive in an aperture 29 in the housing. The plate 21 co-operates with the housing to prevent longitudinal movement of blade 10 and may also prevent lateral twisting movement thereof, although the latter may be prevented by engagement between the blade 10 and the housing.
Patent GB-1390761-A (GB)
Title: Mechanical stokers
IPC: F23K3/00
Filed: 1971-01-08
Abstract: 1390761 Mechanical stokers JAMES PROCTOR Ltd 10 April 1972 [8 Jan 1971] 939/71 Heading F4B [Also in Division G3] In a mechanical stoker of the kind in which a reciprocating ram 14 pushes solid fuel, supplied by a delivery ram 20, over a firegate 10, the delivery ram is controlled in accordance with the height of the pile in front of the ram 14 by means responsive to the resistance offered by the fuel to the advance of the upper part 56, which is movable relative to the lower part 54. When the fuel heap is high enough the part 56 is displaced backwardly relative to the lower part, comprising springs 76. When the parts 54, 56 of ram 14 are in their normal position a micro-switch 80 on rod 69 of the part 54 is held open by an abutment 94 on the rod of the part 54. When part 56 is pushed back switch 80 closes. Ram 14 is reciprocated by cams 12 on shaft 24 acting through the side fire bars 10. As shaft 24 rotates crank 28 causes rod 30 to reciprocate vertically. It is connected to rock operating lever of ram 20 by a coupling block 42. The coupling consists of a pin engagable in a recess in the rod 30. The pin is biased by a spring out of the recess but normally held in the recess by a solenoid 50. When solenoid 50 is energized fuel is fed from ram 20 to ram 14. When too much fuel has built up on the fire gate part 56 is pushed back switch 80 closes. This energizes a relay which opens a contact in the circuit of the solenoid 50, disconnecting the drive to ram 20 so that fuel feeding stops. When the amount of fuel in front of ram 14 is sufficiently reduced, part 56 returns to its normal position aligned with part 54 so that the solenoid 50 is re-energized.
Patent GB-1485584-A (GB)
Title: Property of relative displacement between diffraction gratings
IPC: G01D5/38
Filed: 1975-01-09
Abstract: 1485584 Measuring relative displacement ERNST LEITZ WETZLAR GmbH 9 Jan 1975 [12 Jan 1974] 946/75 Heading G1A [Also in Division G2] In a device for measuring the relative displacement between two diffractive structures 4 and 8 a light source 1 behind a diaphragm 2 illuminates the (movable) diffraction grating 4 via a lens 3. A lens 5 forms the Fourier transform of the radiation passing through the grating 4 into a plane containing a spatial frequency filter 6 which may have two "eye" shaped openings. The openings are intended to isolate certain diffraction orders, for example, the Œ1 orders. The radiation passing through is then focused on to the other stationary diffraction grating 8. A further lens 9 converges the resulting radiation upon a photo-electric receiver consisting of a bank of six receivers. The receivers output, which show sinusoidal phase displaced modulations, are then processed to provide information about the nature of the movement of the diffraction grating 4. The description includes many examples Figs. 2-16 (not shown) of suitable diaphragm apertures for the spatial filters, employing various materials (including coloured or polarized materials) and various patterns of materials to achieve a variety of different phase displacement effects. The optics of the system may be adapted to include concave mirrors as focusing means.