baber/WOPTO huggingface dataset:
Patent GB-1212677-A (GB)
Title: Circuit for indicating variations in mark to space ratio of square wave signals
Inventor: ANDREWS STUART ALEXANDER
IPC: G01R29/02
Filed: 1966-11-09
Abstract: 1,212,677. Measuring mark/space ratio of square wave signals. ROLLS-ROYCE Ltd. Nov. 8. 1967 [Nov. 9, 1966], No. 50218/66. Heading G1U. A circuit for indicating variations in the mark to space ratio of two complementary square wave signals includes two conducting paths arranged to conduct respectively on receipt of one portion of one signal and the complementary portion of the other signal and each including one of two electronic devices of the same kind, e.g. transistors 3, 4, the circuit further including an arrangement for measuring the difference between the time average currents in the two paths, and a compensating electronic device 12 of the same kind as the first two, the three devices exhibiting similar changes in their characteristics with temperature so that the currents flowing in the two paths are unaffected by changes in ambient temperature. In the embodiment disclosed-the transistors 3, 4 are included in both conducting paths, the direction of current flow through a meter 5 depending on which of two switching transistors 1, 2 is conducting, to the bases of which switching transistors the square wave signals are supplied. The meter reading thus gives the difference in the time average currents in the two paths and so indicate the required mark to space ratio, the meter reading being set to zero for a mark to space ratio of unity by an adjustable resistor R7. The transistors 3, 4 and 12 are biased from a source 11, the biasing circuit including a resistor R14 having a high temperature co-efficient of resistance and which is maintained at the same temperature as an instrument e.g. torguemeter, supplying the square wave signals to compensate for a change in mark to space ratio with change in ambient temperature.
Patent GB-1523550-A (GB)
Title: Gas component sensor
IPC: G01N27/41
Filed: 1976-12-02
Abstract: 1523550 Electro-chemical gas sensor WESTINGHOUSE ELECTRIC CORP 2 Dec 1976 [5 Dec 1975] 50256/76 Heading G1N A sensor for determining a component of a gas mixture comprises a cell 20 (two electrodes 22, 26 and electrolyte 24) which with an applied voltage, can pump the gas and a gas diffusion means 30 having an aperture 32, the outside G of which contacts the gas mixture. The pump is operated to remove the gas component from the volume 34 between aperture 32 and the sensor 20 and the cell current is a measure of the gas component diffusing through the aperture and hence the gas component concentration. The sensor preferably measures oxygen, the electrolyte being an oxygen ion conducting solid electrolyte, but any cell capable of the required pumping may be used.
Patent GB-1105877-A (GB)
Title: Improvements in or relating to mechanisms for the intermittent feeding of strip material
Inventor: BOSLEY DENIS VERNON
IPC: G03B1/22
Filed: 1965-11-26
Abstract: 1,105,877. Cine apparatus. RANK ORGANISATION Ltd. Aug.12, 1966 [Nov.26, 1965], No.50337/65. Heading G2E. An intermittent film feed mechanism has a claw plate 2 coupled through springs 9 to two arms 7 which are movable, vertically and normally to the film plane, about pivots 8 by engagement with box cam 4 and a face cam 5 whose two cam tracks 5' receive followers 10 located one on each arm 7. The upper pivot 8 is mounted on an arm 12 pivoting at 13 and spring-loaded at 14, to avoid play between upper arm 7 and the upper flange 20 on plate 2. Arms 7 are radiused where they engage flanges 20 and at their ends. In a modification, the claw plate comprises a flexible band mounted on curved pads on the ends of arms 7.
Patent GB-1404845-A (GB)
Title: Curable polymer powder coating compositions
IPC: C09D125/14
Filed: 1972-11-03
Abstract: 1404845 Coated products BAYER AG 3 Nov 1972 [6 Nov 1971] 50808/72 Heading B2E [Also in Division C3]  Substrates such as wire netting and tubes may be coated with a thermosetting powder coating composition which comprises a powdered mixture of (A) a copolymer (or a mixture of copolymers) having overall copolymerised units of (1) 25-70 wt. % of styrene, α-methyl styrene, o-chlorostyrene, p-chlorostyrene, p-t-butylstyrene, (meth)acrylonitrile or a mixture of two or more thereof; (2) 30-65 wt. % of a C 1-12  alcohol ester of acrylic acid or a C 2-12  alcohol ester of methacrylic acid or a mixture of two or more thereof; (3) 5-20 wt. % of acrylic, methacrylic, itaconic, maleic, fumaric or crotonic acids or a mixture of two or more thereof and (4) 0-25 wt. % of methylmethacrylate, the sum of (1) to (4) being 100% and the average molecular weight being 3000 to 20000; and (B) one or more bis-or tris-(5, 6-dihydro-4H-1, 3-oxazines) of the general formula in which n = 1 or 2; R, R<SP>1</SP>, R<SP>2</SP>, R<SP>3</SP>, R<SP>4</SP> and R<SP>5</SP> are the same or different and each is H or a C 1-6  hydrocarbon group; and R<SP>6</SP> represents a bond (when n = 1) or (when n = 1 or 2) a di- or trivalent C 3-10  cycloaliphatic hydrocarbon group; an optionally partially unsaturated C 1-18  di- or trivalent alkylene group which may optionally contain one or more C 6-10  aromatic hydrocarbon groups or one or more C 5-14  heterocyclic groups; a di- or trivalent radical comprising one or more optionally substituted C 6-12  aromatic hydrocarbon groups; or a di- or trivalent C 5-14  heterocyelic group; the mixture containing, for a total of 100 parts by wt., 5-25 parts by wt. of (B) and 95-75 parts by wt. of (A). One or more pigments and/or levelling agents may also be present. A list of suitable oxazines (B) is given in which n = 1 and n = 2 and in which R to R<SP>5</SP> are all H or some are -CH 3 , and also in which R<SP>6</SP> is alkylene, phenylene or a trivalent aliphatic group or trisubstituted benzene ring. No specific examples are given for the above substrates. Coating is achieved by electrostatic powder spraying, and then heating to fuse and cure the powder.
Patent GB-1401250-A (GB)
Title: Apparatus for surveying pulse frequency
IPC: A61B5/0245
Filed: 1972-11-07
Abstract: 1401250 Electro-medical apparatus A HUBER 7 Nov 1972 [7 Sept 1972] 51207/72 Addition to 1288169 Heading G1N The pulse frequency of a person is monitored by detecting heart bio-potentials with electrodes 1a, amplifying the detected pulse signals, the sensitivity of the amplifier 1 being in the range 0.2 to 1 m.V, preferably 0.5 mV, and comparing the amplified pulse signal with a reference signal from a cycle timer 6 in a comparator 5, including a threshold detector 7, an indicating device being operated depending upon the relationship between the pulse signal and the reference signal, the apparatus being provided in a portable device. As shown, when the pulse signal frequency is below the frequency of the reference signal, a switch 8 is in the position shown and a lamp 9 is flashed in synchronism with the pulse frequency via a device 11. However, when the pulse frequency exceeds the reference frequency, the switch 8 is operated to energize an acoustic alarm 10. A filter 2 having a bandwidth from 0.66 H z  to 3.3 H z  and an adjustable amplifier 3 are also provided. In an alternative embodiment, Fig.2 (not shown), two cycle timers provide signals representing upper and lower reference valves, and two threshold detectors are provided. In the range between the upper and lower value, the detected pulse signal operates a lamp as before. However, depending upon whether the pulse frequency is above or below the upper and lower value respectively, an acoustical signal of one or another form is provided. Different frequency acoustical signals may be generated or signals having a different number of acoustical signals per pulse beat may be generated.
Patent GB-1499859-A (GB)
Title: Apparatus for treating exhaust gases
IPC: B01J8/12
Filed: 1975-12-17
Abstract: 1499859 Catalytic exhaust gas treatment with catalyst regeneration KURASHIKI BOSEKI KK 17 Dec 1975 [28 Dec 1974] 51619/75 Heading B1F Apparatus for treating exhaust gases comprises a catalyst bed designed to allow the passage of exhaust gas in order to remove nitrogen oxide and dust therefrom, the catalyst being capable of reducing nitrogen oxides present in the gas and being continuously or intermittently discharged from the catalyst bed during passage of the gas, means for heating the discharged catalyst to 700-1200C to reactivate it, means for discharging a gas produced by this heating, means for separating the reactivated catalyst from dust, for conveying it to the catalyst bed and for feeding it thereinto continuously or intermittently to compensate for the amount of catalyst discharged. As disclosed, exhaust gas passes in the direction A through catalyst bed 10. Ammonia gas is introduced at 14 and mixed with the exhaust gas at 15 to bring about reduction of nitrogen oxides in the presence of the catalyst. Catalyst is removed via 16 to heater 20 provided with vents 22a, 22b for the gas produced, which is added to the treated exhaust gas stream which then proceeds to a sulphur-oxide-removal stage. At 25 regenerated catalyst is separated from dust and re-cycled to the catalyst inlet 28 of the bed.
Patent GB-1162237-A (GB)
Title: Improvements in or relating to Motion Picture Camera
Inventor: VOCKENHUBER KARL
IPC: G03B19/18
Filed: 1966-11-21
Abstract: 1,162,237. Cine camera. K. VOCKENHUBER and R. HAUSER. Nov. 21, 1966 [Nov. 19, 1965], No. 52040/66. Heading G2E. A cine camera includes a chamber adapted to hold a film cartridge in a predetermined exposure position, a spare cartridge holder adapted to hold at least one spare cartridge, and feeding means to move said spare cartridge from the holder to the exposure position. As shown in Fig. 2, the spare cartridge holder is on the left (as viewed) of the optical axis but set back from the exposure position, and a used cartridge holder is on the right and set further back. A sensing means 54, 55 which is activated by the trailing end of the film 5, causes a motor 23 to rotate a cam disc 18 carrying a crankshaft 20. The crank-shaft 20 causes a carriageway, carrying the exposed cartridge 3, to move rearwards until it faces the used cartridge holder. The cam disc 18 then deactivates the motor 23 via a switch 29 and activates a second motor 41 via switch 30. Motor 41 rotates two seats of discs 36,43 and 37,45 which carry pins 46, 47 which engage the edges of the used cartridge 3 and place it in the used cartridge holder. Motor 23 is reactivated and the carryageway 15 moved forward until it faces the spare cartridge holder, an unexposed cartridge is urged into it by a spring contained in the holder, and the carriageway then moves the cartridge to its exposure position. The sensing means may be a footage counter which returns to zero on the change-over, or a sensing lever 55 which engages the edge of the film which has an indentation 56 in the trailing end. The carriageway 15 may also be moved by a rack and pinion or a screw mechanism, and one motor with change-over clutches may be used instead of the two above.
Patent GB-1096628-A (GB)
Title: Improvements in or relating to drive mechanisms for roller hearth furnaces
IPC: C21D9/00
Filed: 1964-12-22
Abstract: 1,096,628. Friction clutches. MARLAND FOUNDATION. Dec. 22, 1964 [March 6, 1964], No. 52104/64. Heading F2C. [Also in Division F4] A drive to each of a number of sections of the roller bed of a roller-hearth furnace (see Division F3-F4) incorporates a one-way clutch 220 and a disc clutch 222 mounted on a driving shaft 226. Clutch 220 has an inner race 224, an outer race 228 mounted on bearings 230, and rollers 232 between the races adapted to wedge in one direction and to rotate in the other. Torque is transmitted in the freewheeling direction by a disc clutch 222 comprising a rim 242 mounted on said outer race 228 and formed with a brake lining 246 extending inwardly between brake shoes 248 and 250. The former terminates in a sleeve 252 attached to shaft 226, which also carries a sleeve 254 to which is attached a yoke 258 by pins 256. Movement of yoke 258 slides sleeve 254 along shaft 226 causing pawls 262 to engage brake shoe 250, locking said outer race 228 to the shaft. Another locking one-way clutch (502), Fig. 11 (not shown), incorporates a magnetic clutch (506) combined with a one-way clutch portion (504). The former has a disc (520) mounted on the outer race (512) of the latter, said disc having spaced depending fingers (522) enclosing a further disc (524) with depending fingers (526). The fingers respectively support interengaging brake discs (528 and 530) and disc (524) is connected to a magnetic plate (532) by bolts (534). Activation of a helical coil (540) in a stationary field piece (536) attracts plate (532), wedging the brake discs together. In another modification, Fig. 12 (not shown), pressure between a drum on the outer race, a brake lining and an inner flexible ring is caused by an inflatable tube.
Patent GB-1084270-A (GB)
IPC: C01B33/148
Filed: 1964-12-23
Abstract: 1,084,270. Concentrated silica sol. ESSO RESEARCH & ENGINEERING CO. Dec. 23, 1964 [Dec. 31. 1963], No. 52179/64. Heading C1A. A concentrated SiO 2  sol is prepared by ion exchange of an aqueous alkali metal silicate solution to a SiO 2 /M 2 O content of 20: 1 to 50: 1 and a pH of 8-9À5, and evaporation of the effluent under superatmospheric pressure at above 212‹ F. The ion exchange may be continued to a lower SiO 2 /M 2 O ratio and further alkali metal silicate then added. A cation exchange resin in the H form is used, which may be a sulphonated styrene-divinyl benzene copolymer, sulphonated phenol-formaldehyde resin, or aromatic hydrocarbon polymer containing sulphonic acid groups. The alkali metal silicate may be of Na, K, or Li and have a concentration of 1-5 weight per cent. Pressures of 20-100 p.s.i.a. and temperatures of 228- 282‹ F. are specified. The concentration of the sol produced is 35-50 weight per cent SiO 2 .
Patent GB-1313737-A (GB)
Title: Means for the continuous casting of aluminium-killed steels
IPC: B22D11/118
Filed: 1970-07-16
Abstract: 1313737 Continuous casting KLOCKNERWERKE AG 16 July 1970 [9 Sept 1969 28 April 1970] 52208/70 Divided out of 1313736 Heading B3F [Also in Division F4] In a tundish (V) of trough form, a chamber (2) contains a layer of slag which reacts chemically with alumina inclusions to remove them from aluminium-killed steel (1) which flows through the chamber before passing to at least one outlet nozzle (6). The apparatus is described in the parent Specification 1,313,736 for use in a process of continuously casting the steel.
Patent GB-1278509-A (GB)
Title: Means for measuring the oxygen content of a metallic melt
Inventor: NSTIERNA OTTO VON KRUSE
IPC: G01N33/20
Filed: 1969-10-27
Abstract: 1278509 Electro-chemical analysis ALLMANNA SVENSKA ELEKTRISKA AB 27 Oct 1969 [28 Oct 1968 2 Oct 1969] 52472/69 Heading G1N A probe for determining oxygen in molten metal comprises a plug of solid electolyte not more than 1 mm. dia fixed through a hole in the end of a closed silica tube containing the reference gas, preferably air. As shown a cylindrical plug 13 of zirconia is sealed by fusing in a hole 12 in a silica tube 10 which is detachably mounted in a hoder 15 e.g. by a screwed or bayonet joint. Internal connection is made by a platinum wire 18 passing through an aluminium oxide rod 21, urged by spring 23 into contact with the electrolyte 13. The counter electrode may be a surrounding cylinder 24 of molybdenum, tungsten, chromium or iron. Modifications: (i) The internal connecting wire may be part of a Pt/PtRo thermocouple; (ii) The counter electrode may be flame sprayed on the outside of the silica tube 10, and covered with a protective layer e.g. of aluminium oxide; aluminium magnesium spinel or silica, Fig. 2 (not shown); (iii) the electrolyte cylinder 13 may project inside the tube and have its inner end "platinized" to contact the platinum wire wound round it Fig. 3 (not shown). (iv) The reference gas may be oxygen with carbon monoxide and carbon dioxide.
Patent GB-1213827-A (GB)
Title: Improvements in electric plugs, particularly for motor vehicle trailers
Inventor: MERTEN WOLFGANG
IPC: B60D1/62
Filed: 1968-11-06
Abstract: 1,213,827. Two-part couplings. G. MERTEN and W. MERTEN, [trading as MERIT-WERK, MERTEN & CO. K.G.]. 6 Nov., 1968 [18 Nov., 1967], No. 52647/68. Heading H2E. An electrical plug connector for a motor vehicle trailer comprises a contact assembly 2 and a concentric multi-shell housing which protects the interior of the connector from water and dirt. As shown, the housing comprises a single-piece, inner shell 1 of metal or hard plastics, protected by a soft, flexible jacket 3, which may be of rubber. A flange 5 formed on the jacket 3 seals one end of the hard shell 1 and a conical portion 4 grips and seals a cable. A sealing ring 5 retains the contacts assembly 2 and forms a seal with a mating socket connector. In another embodiment, the flexible jacket is situated inside the hard shell 1 and is formed with collars to locate it inside the shell and to help retain the contact assembly 2. In a further embodiment, a flexible jacket is sandwiched between two hard shells which are formed in halves, the assembly being held together by two pairs of screws.
Patent GB-1200055-A (GB)
Title: Production of patterned thermoplastic sheet material
Inventor: SAUL WALTER
IPC: B32B27/00
Filed: 1966-11-26
Abstract: 1,200,055. Laminates. DUNLOP SEMTEX Ltd. 22 Nov., 1967 [26 Nov., 1966], No. 53036/66. Addition to 1,152,036. Heading B5N. [Also in Division B2] Patterned thermoplastic sheet material is produced in a method comprising the steps of applying a pattern to one surface of a single- or multi-layered thermoplastic resin composition, at least one layer of which contains a blowing agent and is thereby expandable, adhering the other surface of the resin composition by means of an adhesive to a carrier sheet, heating to decompose the blowing agent to form a cellular layer and stripping from the carrier sheet the sheet material so formed including a layer derived from the adhesive. The thermoplastic material is preferably based on vinyl chloride resins, e.g. P.V.C., vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinylidene chloride copolymer. The carrier sheet is preferably an endless steel belt whilst the adhesive is preferably based on a P.V.C. plastisol composition. The expandable thermoplastic layer is produced by spreading an expandable plasticol composition, suitably based on P.V.C., on to a calendered thermoplastic sheet. The plastisol-coated sheet material may be passed beneath infra-red heaters to gel the plastisol such that a pattern may then be applied to this gelled plastisol layer. The composite structure is adhered to the carrier sheet by means of the P.V.C. plastisol adhesive composition and the composite laminate is passed through a heating oven to form the cellular layer. This heating oven may be of the infra-red or high-frequency dielectric type and may comprise two or more distinct zones in which different temperatures are maintained. A spray of cooling water may be directed against the underside of the carrier sheet when it has left the oven. In a preferred embodiment, a hardenable surfacing composition, suitably based on a P.V.C. plastisol, may be applied to the patterned surface of thee xpandable thermoplastic layer prior to the heating step. This composition is chosen to be hardenable to a clear layer which may then be conveniently embossed. The final composite structure may be laminated to a backing material at its unpatterned lowermost surface. This backing material may be a flooring felt saturated with bitumen or resin or a thermoplastic backing material based on a P.V.C. binder. This may be achieved in the former case by using an acrylic emulsion and in the latter by heat lamination. The adhesive composition may contain a plasticizer and stabilizer and the expandable layer may contain a plasticizer and pigment, the blowing agent being preferably azodicarbonamide.
Patent GB-1161418-A (GB)
Title: Device for the Assembly of Metallic Sectional Structures
IPC: F16B7/04
Filed: 1966-11-28
Abstract: 1,161,418. Building frameworks. SOC. INDUSTRIELLE DE TRANSFORMATION DES PLASTIQUES S.A. 28 Nov., 1966 [20 July, 1966 (2)], No. 53169/66. Headings E1K and E1W. A building framework comprises a hollow upright interconnected with a hollow cross member by means of an element constantly urged by a return element to retract within the end of the cross member and having a transversely elongated head engageable in a slot in the upright which upon rotation of the cross member engages behind flanges delimiting the slot, the element being movable to its extended position whereby it may be so engaged in the slot, by operating means which acts against the return element. In one embodiment, the horizontal framing members 2 have at their heads rods 13 inwardly retractable under spring pressure, the outer ends of the rods each being provided with a head 15 of prismatic shape. To connect a horizontal member 2 to a vertical framing member a wedge 22 is inserted through a slotted part of the member 2 to cause the rods to be displaced outwardly against the spring pressure. Each head 15 is then passed through a slot 6 in the vertical framing member I and into a wider channel behind the slot, after which the member 2 is rotated about its longitudinal axis from the position shown in Fig. 2 to the position shown in Fig. 3. Removal of the wedge 22 then allows the head to grip the walls of the member 1 on each side of the slot 6. In a modification, Figs. 13 to 18, not shown, a square portion behind the head engages the walls of the slot 6 to prevent rotation of the horizontal member 2 after it has been installed. The application of the invention to framing members of modified sectional shapes are described with reference to Figs. 19-21 (not shown).
Patent GB-1275579-A (GB)
Title: Electronically controlled antenna system
IPC: H01Q23/00
Filed: 1969-10-30
Abstract: 1275579 Aerials INTERNATIONAL STANDARD ELECTRIC CORP 30 Oct 1969 [1 Nov 1968] 53198/69 Heading H4A A TACAN beacon aerial array comprises a radiator surrounded by two or more concentric circular arrays of parasitic elements. Switching diodes controlled by re-circulating shift registers, which are stepped by a common clock, determine which parasitic elements are effective, so as to provide a rotating radiation pattern capable of producing two predetermined audio frequencies in a receiver. As described, a central radiator 1, Fig. 1, mounted on a counterpoise 4, is surrounded by two concentric rings 2, 3 of closely spaced parasitic monopole elements 5. The base of each parasitic element is coupled to the counterpoise via a diode which can be made conductive, when the element is effective, or non-conductive, when the element is inhibited, by switching signals applied through an R.F. choke (Fig. 2, not shown). A rotating nine-lobed cardioid type TACAN radiation pattern is produced by progressively enabling the diodes of selected parasitic elements in the rings 2, 3. This is effected by coupling a master clock 11 to two programmed re-circulating shift registers, the first of which has its separate bins coupled to the innermost ring of parasitic elements 2, and the second of which has its separated bins coupled to the outermost ring of parasitic elements 3. In another embodiment, in order to obtain an aerial which is operative over two frequency bands, four concentric rings of parasitic elements, two inner, and two outer, are provided (Fig. 3, not shown). In use, only the elements in one inner ring and in the corresponding outer ring are made effective at a time. The parasitic elements may be of dipole form (Fig. 4, not shown), and may be stacked as shown in Fig. 5 to improve vertical directivity. In this arrangement diodes 24, 25, 26 at the centres of the dipoles are separately coupled to bifilar R.F. chokes 22, 23, which provide a path for control switching signals.