baber/WOPTO huggingface dataset:
Patent GB-505624-A (GB)
Title: Improvements in, or relating to, head lamps for vehicles and in, or relating to, floodlights and searchlights
IPC: F21V3/04
Filed: 1937-11-11
Abstract: 505,624. Vehicle &c. lamps. LAURIE, I., and LAURIE, E. Nov. 11, 1937, No. 30934. [Classes 75 (ii) and 75 (iv)] To improve the fog-penetrating power of a vehicle headlamp, floodlight or searchlight, the front glass is coloured yellow at the upper part a with the whole or portions of the lower part b left plain. The yellow colouration is obtained by staining the front glass itself or by the use of a separate aperturod sheet of coloured glass or celluloid. Fig. 2 shows an arrangement in which plain portions c, dextend upwardly into the coloured part a. In the construction shown in Fig. 3, circular plain portions e are arranged in the lower part of the glass and there are provided pivoted shutters f of yellow glass by movement of which more or less of the portions e may be covered to increase or decrease the proportion of yellow light projected. Reference has been directed by the Comptroller to Specifications 261,216,285,413,328,733, [all in Class 75 (iv)], 330,568, [Class 75 (ii)], and 376,431.
Patent GB-857037-A (GB)
Title: Improved power unit
Inventor: FITZGERALD ROLAND MICHAEL
IPC: B64C29/00
Filed: 1958-09-27
Abstract: 857,037. Vertical lift aircraft. ROLLSROYCE Ltd. July 9, 1959 [Sept. 27, 1958], No. 30955/58. Class 4. [Also in Group XXVI] A power unit adapted to provide vertical and/or horizontal thrust for an aircraft comprises a gas turbine engine, two turbo-fan units, one of which is positioned to provide vertical thrust the other of which is positioned to provide forward propulsive thrust, ducting interconnecting the gas turbine engine and the turbo-fan units, and valve means in the ducting so that at least part of the gaseous output of the gas turbine engine can be applied to either fan turbine unit at will. An aircraft nacelle 10 houses a conventional gas turbine engine 11 provided with a jet pipe 13, the gases from which pass through the turbine unit 26 of a forward propulsion turbo fan unit 16. Turbine unit 26 drives a fan 27 which draws air through an annular intake duct 28 and discharges it rearwards. The jet pipe, intermediate its ends, is formed with a branch to a further turbo-fan unit 15 arranged about a normally vertical axis to provide vertical lift to the aircraft. The unit 15 has a similar construction to unit 16 except that the fan draws air through louvres (not shown) formed in the side walls of the nacelle. A pivoted valve 14 is mounted in the jet pipe and it may be moved from the position shown in which it blanks off the gas inlet to unit 15, to a position in which it closes the jet pipe and diverts the gas from engine 11 through the turbine of unit 15.
Patent GB-335084-A (GB)
Title: Improvements in photographic lenses
IPC: G02B9/12
Filed: 1929-10-12
Abstract: 335,084. Zeiss, C. [Firm of]. Oct. 23, 1928, [Convention date]. Lenses. - Photographic objectives of large aperture consist of a diverging biconcave element between two converging elements, of which latter the element next to the, incident light is a cemented doublet, and have the vertex distance between the front surface of the doublet and the front surface of the divergent element greater than one-tenth of the focal length of the objective. The clear distance between the back vertex of the first element and the divergent element is greater than one-twentieth of the focal length of the objective. With the exception of the divergent lens of the doublet all the lenses have a refractive index greater then 1.58, and the difference of refractive indices for the cemented lenses is greater than 0.07. The value of the radius of curvature of the cemented surface lies between the values of the radii of curvature of the adjacent surfaces. Numerical data are given in the Specification for an objective having an aperture of F/2.7.
Patent GB-1028757-A (GB)
Title: Improvements in and relating to electric heating apparatus
IPC: F24H9/20
Filed: 1964-08-04
Abstract: 1,028,757. Control of electric heaters. LICENTIA PATENT - VERWALTUNGS G.m.b.H. Aug. 4, 1964 [July 29, 1963], No. 31185/64. Heading H2H. A heater 1 for a liquid is controlled normally by a manually adjustable thermostat 2, 3 which in the boil position operates at a temperature lower than boiling point, but energization of the heater 1 is continued for a period to enable the liquid to reach boiling point. The thermostat operating knob 3 in the boiling position moves a switch 4 to dotted position II energizing the heater 5 of a bimetal switch 6. When the thermostat 2 opens at say 90 C. in the case of water, the bimetal cools, and after a delay the switch 6 opens. In an alternative arrangement the heater 1 is in series with the heater 5 which is shunted when the switch 2 opens so that it cools. In a further arrangement, the bimetal is movable and is heated by the heater 1 in the boil position. Other arrangements are disclosed in the Specification.
Patent GB-740598-A (GB)
Title: Polystyrene of improved impact strength
IPC: C08F36/04
Filed: 1953-11-11
Abstract: Polystyrene of improved impact strength is obtained by mass polymerizing a composition comprising 1 to 50 parts of a butadiene-styrene copolymer containing from 50 to 90 per cent of combined butadiene, and 0.05 to 1.0 part of a di- or tri-organic ester of phosphorous acid per 100 parts of styrene until the average molecular weight of the polystyrene is at least 30,000. The phosphite ester may be added with the copolymer to the monomeric styrene or may be first incorporated with the copolymer either during or after the copolymerization and specified are di- and tri-methyl, ethyl, butyl, octyl, lauryl, phenyl, benzyl, chlorophenyl, nitrophenyl and naphthyl phosphites and monobutyl diphenyl, diethyl monophenyl and monocresyl diphenyl phosphites. From 0.05 to 0.2 parts of an alkyl phenl, such as butyl, octyl and lauryl phenols and tertiary butyl catechol, as stabilizer for the butadiene-styrede copolymer, may be added to the styrene before or after polymerization or to the copolymer prior to polymerization. Catalysts such as benzoyl, lauroyl and di-(t.-butyl) peroxides and t.-butyl hydroperoxide may be used, preferably in the absence of free oxygen.  Conventional additives such as pigments, dyes, lubricants and antistaticizers may also be included.
Patent GB-775346-A (GB)
Title: Improvements in sliding bolts
IPC: B21C23/08
Filed: 1953-11-12
Abstract: 775,346. Making fastenings; punching. WALKER & WOODWARD, Ltd., and WOODWARD, D. H. E. Nov. 12, 1954 [Nov. 12, 1953], No. 31404/53. Addition to 681,170. Classes 83 (2) and 83 (4). A method of making a bolt assembly comprises punching a slot or opening 11 in a length of extruded metal of channelled cross-sectional shape which is to form the bolt case 10, the slot having a longitudinal portion 19, Fig. 3, and a lateral notch 37, 22 at or near one or each end thereof, deforming the channel to bring the free edges thereof towards each other to a separation less than the cross-section of the bolt shoot 32, and, prior to or subsequent to the deforming operation, assembling the bolt with its handle 34 projecting through the slot. The length of metal has a base portion 12, side walls 13 and outer and inner flanges 15, 16. The slot portion 19 and pilot portions 28, 29, Fig. 3, of the notches 37, 22 are formed in the base portion 12 by means of a punch 25 and die 26, Fig. 4. The notches 37 are formed in a sidewall 13 by means of spaced punches 31, Fig. 5, co-operating with a die 30. The notches 22 are formed in a similar manner in the other side wall 13 by using a die similar to the die 30 but inclined in the opposite direction. The dies may be provided with positioning stops. The slot portion 19 and notches 37, 22 may be formed in a single punching operation. The die may support the channelled metal internally and the punch act on its external face. The bolt is preferably assembled within the channel by entering the leading end of the bolt through the slot 11, Fig. 2, so that it temporarily emerges from the open mouth of the channel between the flanges 16. The bolt is moved endwise until the part 33, Fig. 2, thereof lies substantially in the plane of the slot and the bolt is then moved angularly to bring the emergent leading end thereof within the channel. The handle 34 is secured to or formed integrally with the bolt. The transverse dimensions of the slot portion 19 and' optionally those of the notches may be less than the diameter of the bolt. Furthermore, the knob 36 on the handle 34 may be greater in transverse cross-section than any part of the slot. When the knob 36 is of smaller crosssection than the slot, the bolt may be assembled wholly through the open mouth of the channel. After the bolt has been assembled within the channel, the latter is deformed to bring the side walls into approximately parallel relationship, as shown in Fig. 1. When the handle is separate from the bolt, the latter may be assembled through the end of the channel after closure and the handle secured to the bolt when this is in position in the bolt case. The outer faces of the bolt case may be polished prior to closure of the channel. The bolt may be drilled transversely to form a recess in which is disposed a coiled compression spring and a ball or other suitable member for bearing against the inner surface of the bolt case. Specification 775,347 is referred to.
Patent GB-1312088-A (GB)
Title: Heating apparatus
IPC: A47J27/00
Filed: 1970-06-29
Abstract: 1312088 Flash heating MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 29 June 1970 [27 June 1969] 31443/70 Heading H2H A heating element 10, particularly for a hot plate, or relatively low resistance has a higher resistance element 11, which may be variable, connected in series which is shuntable by a PTC ferro electric transition resistor 12 so that on initial connection to a supply the PTC resistor has a low value and hence the combination gives a higher heat dissipation, e.g. for cooking food, than at some higher determined temperature when such food is merely to be kept warm. In one example the heating is reducible from 170 watts to 45 watts. The PTC resistor 12 has a sharp knee in its resistance/temperature characteristic examples of which are given in the Specification and may be of semi-conductor ceramic material, e.g. barium titanate. Resistors 10, 11 may be of conventional material i.e. Ni-Cr. The combination may be alternatively secured against the outer part i.e. the side or bottom of a cooking container. The PTC resistor has a value lower than element 10 initially but a higher value than element 11 after transition.
Patent GB-416539-A (GB)
Title: Improvements in machines for moulding and compressing plastic substances
IPC: B30B11/28
Filed: 1933-11-11
Abstract: 416,539. Moulding plastic substances by extrusion. PORTEUS, G., Leeds Bridge Works, Hunslet, Leeds. Nov. 11, 1933, No. 31461. [Class 87 (ii).] In machines for moulding plastic material of the kind comprising a pair of interengaging drums either or both of which have one or more annular compression chambers formed on their periphery with which co-operates the plain peripheral portion of the other drum, the base of each annular compression chamber is provided with a plurality of annular series of apertures which have flared entrances arranged side by side and occupying practically the whole base area of said chamber so that the co-operating plain peripheral portion of the other drum will compress substantially all the material into the flared entrances and force it through the plurality of apertures simultaneously. The two drums 1 each have a narrow annular flange 3 and a broad flange 2 which co-operates with the annular compression chamber formed in the other drum. Each compression chamber has two annular series of apertures 4 which are of rectangular cross-section and have flared entrances 5. The drums 1 are detachably secured by bolts 6 to driving shafts 8 so as to be readily interchangeable. In a modification, one drum has a plain periphery which cooperates with a single compression chamber on the other drum. In a further form, one drum may be mounted inside the other and apertures may be provided in one or both drums. The material emerging from the apertures is removed by a stationary knife or scraper to form cubes.
Patent GB-1465698-A (GB)
Title: Seats
IPC: A47C4/54
Filed: 1973-07-02
Abstract: 1465698 Aircraft inflatable seats WESTLAND AIRCRAFT Ltd 25 June 1974 [2 July 1973] 31477/73 Heading B7W [Also in Division A4] An inflatable helicopter seat (see Division A4) is connected to the helicopter by straps 25 secured to the seat back 13 and provided with hooks 27 and by two triangular nets 28 secured one to each side of the seat, each net being secured along its base to the floor 30 and at its apex to straps 31 secured to the roof 26. The inflation supply for the seat may be derived from a tapping on the helicopter engine compressor.
Patent GB-1319016-A (GB)
Title: Variable drive roller conveyors
IPC: B65G47/26
Filed: 1971-07-05
Abstract: 1319016 Roller conveyers ALVEY Inc 5 July 1971 [6 July 1970] 31480/71 Heading B8A The pressure of a driving belt 18 on pairs of live rollers 13 is adjustable by means of drive control rollers 29 mounted on eccentrics 23 of which shafts 28 are rotatable by a tool (not shown). The rollers 13 are mounted on stationary shafts 14 and sleeves of inner bearing races of the pairs of rollers 13 are engaged by hook portions 21 of spring wire brackets 20 of which loops 22 are snapped into peripheral recesses 24 formed in the eccentrics 23. In a modification, Fig. 7, a lever 32 for adjusting the eccentric is provided on the shaft 28. The adjusting lever (38) in a further modification, Figs. 9, 10 (not shown), may be slid longitudinally to permit removal of the eccentric (23).
Patent GB-429567-A (GB)
Title: Improvements in centrifugal machines for casting metal pipes
IPC: B22D13/10
Filed: 1934-11-02
Abstract: 429,567. Casting-machines. INTERNATIONAL DELAVAUD MANUFACTURING CORPORATION, Ltd., Exchange Place, Jersey City, New Jersey, U.S.A.-(Assignees of Arnold, P. L.; Park Avenue, Riverton, New Jersey, U.S.A.) Nov. 2, 1934, Nos. 31491 and 31492. Convention dates, Dec. 30, 1933. [Class 83 (i)] Moulds.-A jacketed centrifugal mould D is provided with a partition J and blades M which, during rotation draw water through the driving sleeve E. In a modification the partition J, Fig. 6, is attached to the non- rotating casing A and has fixed blades S, while the blades M<1> extend from the mould itself. If desired, instead of or in addition to the partition J, a perforated sleeve U may be used to circulate the water near the remaining surface of the mould. Specification 285,821, [Class 83 (i)], is referred to.
Patent GB-299850-A (GB)
IPC: B22C9/06
Filed: 1928-10-30
Abstract: 299,850. Erichsen, A. M. Nov. 2, 1927, [Convention date]. Moulds ; mould materials.-Pre cious and other non-ferrous metals are cast in moulds composed wholly or in part of a metal or an alloy that is a poor conductor of heat. Such a metal is an ironnickel alloy with about 35 per cent of nickel and 1 per cent of chromium. The mould may be of cast iron lined with such metal either by welding, spraying, or by attaching with screws or otherwise. In casting slabs such lining b may be applied at the top and bottom of the mould, the centre d being of relatively good conducting metal in order that the ingot may solidify uniformly. The Specification as open to inspection under Sect. 91 (3) (a) refers to an alloy with over 20 per cent of nickel, and states that the nickel chromium alloy above referred to has a heatconducting capacity below 0.04 calories per centimetre second. This subject-matter does not appear in the Specification as accepted.
Patent GB-1093496-A (GB)
Title: Improvements in two-stroke internal combustion engines
IPC: F02B75/26
Filed: 1963-08-12
Abstract: 1, 093, 496. Two-stroke engines; balancing. T.W. BUNYAN. Aug. 12, 1964 [Aug. 12, 1963], No.31733/63. Headings F1B and F1M. A two-stroke engine with a pump space below the piston has the lower end of the cylinder closed by a plug 7 through which the piston rod passes the piston and plug having complementary flared surfaces 8, 8'. The cylinder has a combined inlet and transfer port 3 controlled by a rotary disc valve 12, a second transfer port 5 diametrically opposite thereto, and an exhaust port 4, the valve 12 opening the port 3 to the intake manifold 14 only when the piston is on its upstroke. The surfaces 8, 8', are formed as sections of a cylinder and a skirt 18a covers the exhaust port 4 on the piston upstroke. In a modification the surfaces 8, 8', are funnel-shaped. In a swashplate engine, Fig. 4, the intake passages 15 are controlled by a rotary valve 28 on the drive shaft which also forms a balancing mechanism for the shaft.
Patent GB-1030122-A (GB)
Title: Preparation of ª-fluoro-acrylonitrile
IPC: C08F20/50
Filed: 1963-08-12
Abstract: a -Fluoroacrylonitrile is prepared by reacting ethylene with 1,2-difluoro-1,2-dicyanoethylene, the reaction being carried out continuously at a temperature from 400 DEG  to 800 DEG  C., or batchwise at a temperature from 230 DEG  to 360 DEG  C.  Examples are given.
Patent GB-447187-A (GB)
Title: Process for the production of moulding powders
IPC: C08L1/08
Filed: 1934-11-06
Abstract: Powders suitable for pressure or injection moulding are produced by causing cellulose esters or ethers, with or without plasticizers, fillers, or colouring matters to absorb an aqueous emulsion of a volatile solvent and/or swelling agent containing less water than corresponds to the weight of the cellulose derivative.  The emulsion may contain also a water soluble ingredient such as alcohol.  In an example, a mixture of 100 parts of acetone-soluble cellulose acetate with filler and colouring matter is caused to absorb an aqueous emulsion consisting of 50 parts of water, 50 parts of alcohol, and 25 parts of methylene chloride, and mixed in a kneading apparatus. Specifications 421,115, [Group V], and 421,332 are referred to. Reference has been directed by the Comptroller to Specification 390,977.
Patent GB-1189849-A (GB)
Title: Plastic Foil Ceiling
Inventor: GIBSON MALCOLM MILNE
IPC: E04B9/30
Filed: 1967-07-11
Abstract: 1,189,849. Improvements in or relating to ceiling linings. E. O. W. EKMAN, B. BRUNDIN and C. O A. EKMAN [trading as LICENTIA, EKMAN and BRUNDIN]. 17 Sept., 1968 [11 July, 1967], No. 31885/67. Addition to 1,008,531. Heading E1W. The subject matter is exactly as in the parent with the modification that the thin sheet of resilient material is perforated.
Patent GB-320542-A (GB)
Title: Improvements relating to neckties
IPC: A41D25/16
Filed: 1928-11-02
Abstract: 320,542. Clark, P. Nov. 2, 1928. Drawings to Specification. Neckties.-In neckties having a resilient lining, the lining is made of two layers connected at the longitudinal edges, but leaving the intermediate portions free and unconnected. The layers may be of material treated with rubber or other similar material preferably on those faces remote from the fabric of the necktie.
Patent GB-671212-A (GB)
Title: Improvements in automatic shaft-positioning systems and apparatus
IPC: H03J5/20
Filed: 1947-12-03
Abstract: 671,212. Selective control. COLLINS RADIO CO. Dec. 3,1947. [Dec. 14,1946] No. 31967/47. Class 40 (i). In a system in which a motor drives a stopselecting member and a hunting switch, and is stopped when the latter finds a marked terminal, accurate positioning is ensured by providing parallel circuits for the motor, one through the hunting switch wiper and the other 'through adjustable springs controlled by a toothed wheel on the same shaft. The invention is described with reference to a system such as that described in Specification 556,363 in which when it is necessary to change the position of a shaft 12, a switch 53 is moved to select the new position and, as a result, a motor 34 through gearing and a slipping clutch 37 drives the shaft 12 to its starting position and through a one-way coupling 40, 41 drives the hunting switch 42 and stop-selectirig shaft 20 to the new position and then reverses, driving shaft 12 until a stop ring drum is stopped by engagement of one of a number of projections 16 ... 18. with the selected stop 24 ... 26. In the present system, movement of switch 53 to a new position energizes relay 47 which remains latched mechanically and completes the circuit of the motor in a direction to restore shaft 12 to its starting position. The motor at the same time drives the selector switch 42 and stopselecting shaft 20. Shaft 12 is stopped mechanically in its starting position but the motor continues to drive the rest of the apparatus and at a predetermined position actuates a clutch device 63 to unlatch the armature of relay 47 which holds until the gap in the selector disc reaches the marked contact and the springs 45, 49 are opened by the notched disc 44. When the armature is released, the latching arm makes a further movement to operate change-over contacts which cause the motor to run in the opposite direction, driving shaft 12 but, owing to the one-way coupling 40, 41, not the stop-selecting shaft and selector. After shaft 12 has been stopped in the selected position, the motor continues to run until at a predetermined position it actuates clutch device 63 to restore the parts 58 ... 60, and with them the changeover contacts, to the position shown in the drawing. Since relay 47 has been de-energized, the motor then stops. The Specification, as open to inspection under Sect. 91, included also Figs. 9 ... 12 (Cancelled), (not shown), illustrating constructional details of the reversing switch, relay 47 and the clutch 63. This subject-matter is not included, in the Specification as accepted.
Patent GB-485989-A (GB)
Title: Improvements in signal generating circuits
IPC: H04N7/10
Filed: 1936-11-23
Abstract: 485,989. Valve circuits. PHILCO RADIO & TELEVISION CORPORATION. Nov. 23, 1936, No. 32153/37. Convention date, Nov. 23, 1935. Divided out of 485,924. [Class 40 (v)] [Also in Group XXXV] A circuit 36 transmits only a portion of a signal derived from a source 1 to form a flattened wave, a second circuit 38 forms a second flattened wave from a second derived signal, the waves are displaced relatively in at least one of the circuits and are so combined in opposition that they largely cancel each other and leave only a pulse signal of short duration, Fig. 6 (not shown). The signals are displaced in phase by resistances 37, 39 in combination with the coupling condensers. The firstlimiting valve in each circuit is followed by a second limiting valve 42, 43 to limit the signal for proportionately low asymmetrical amplitudes. This gives positive and negative pulses of uneven duration in the two circuits. On combination in opposition, pulse signals of twice the original frequency are produced. A third signal is derived from the source and controls the exact time of occurrence of the pulse by adding it through a valve 45, as described in Specification 485,924. A limiting valve 46 transmits only part of the resultant short pulse.