baber/WOPTO huggingface dataset:
Patent GB-1377805-A (GB)
Title: Optical indicating apparatus
IPC: H03M1/00
Filed: 1972-02-14
Abstract: 1377805 Voltage measuring B B C BROWN BOVERI & CO Ltd 14 Feb 1972 [15 Feb 1971] 6834/72 Heading G1U [Also in Division G4] A bar type voltage indicator utilizing a material, such as a liquid crystal, having an optical parameter, such as colour or degree of opacity that changes abruptly when an electric potential applied across it exceeds a particular threshold value, and of the type in which a monotonically increasing potential gradient is applied along the length of the material, the gradient commencing from a level determined by an unknown voltage which is to be indicated so that the position along the material at which the potential across it would normally change sign is indicative of the magnitude of the unknown voltage, is characterized in that the voltage gradient producing means includes diodes which ensure that the potential across the material can only have one polarity. Without this feature only the material in a neighbourhood of the polarity reversal would exhibit a different value of the optical parameter, for example by being light rather than dark, but with the characterizing feature of the invention the different value of the optical parameter is extended back to the beginning of the material thereby providing a bar type display, rather than a moving spot display. In a first discretely variable embodiment, Figs. 1 and 2, the unknown voltage U m  is applied to a single electrode deposited on a base member 3 of a liquid crystal unit LC 1  and a monotonically increasing staircase potential is applied to the other side of the liquid crystal by means of a potential divider R 1 , R 2 , ... R 19 , diodes D 1 , D 2 , ... D 19  and electrodes E 1 , E 2 , ... E 19 , so that as a consequence the left-hand portion of the liquid crystal is light up to a point corresponding to the unknown voltage U m . In a second continuously variable embodiment, Fig.3, the base electrode E r  is made resistive, and a straight line potential gradient is established along it, and the unknown voltage U m  is applied to all the diodes D 1 , D 2 , ... directly. This arrangement allows the light portion of the liquid crystal to vary continuously in length with the unknown voltage providing the potential gradient along the base electrode E r  is not so steep that the potential variation over a length equal to the width of one of the upper electrodes E 1 , E 2 , ... exceeds twice the threshold voltage of the liquid crystal.
Patent GB-512453-A (GB)
Title: Improvements in or relating to motion picture apparatus
IPC: G03B1/42
Filed: 1938-03-04
Abstract: 512,453. Kinematograph projectors. KODAK, Ltd. (Kodak Akt.-Ges.). March 4, 1938, No. 6905. [Class 97 (i)] The gate is movable into partly open position by a' manually-operable spring-controlled part. and independent means is provided for moving film-loop-forming members, and pressure members for the feed sprockets, into film threading position, against spring action, and for completing the gate opening; the parts may be locked in threading position, and are returned to normal position by spring action upon release of the locking means by the operating member for the spring-controlled part. As shown, the gate. which may be as described in Specification 512,454. comprises an intermediate pressure plate 20 having extensions 21, 22, capable of being engaged by arms 29, 25 of levers 27, 23, pivoted respectively at 28, 24. The pressure members 12, 13 for sprockets 10, 11 are carried by plates 14, 15 which are mounted on pivots 16, 17. and carry loop-forming drums 18, 19. The plates 14, 15 are connected by a link 30 so that they move simultaneously into and out of threading position. Springs surround the pivots 17, 24. 28 and urge the parts into normal position. To bring the parts into the threading position shown, the lever 23 is first moved by hand from a substantially vertical position to the broken line position shown. thereby causing the arm 25 to open the lower end of the gate, and then the plate 15 is turned downwards by hand into the position shown. The plate 14 is thereby also turned to the position shown and causes a pin 26 on the drum 18 to turn the lever 27 to the position shown so that the arm 29 opens the upper part of the gate. The lever 23 may then be released so that it assumes the full line position in which a shoulder 32 engages a pin 33 on the drum 19 to lock the parts in threading position. After threading, the lever 23 is moved to its unlocking, broken line. position and released; the drums 18, 19 then move from the film slightly before the members 12. 13 engage it, and before the gate is closed, all the movements being effected by the springs. In a projector capable of use for "still" projection, and to ensure that the parts of the projector are set at the "still" projection position for threading, an arm 42, having an upward projection at its free end, is pivoted to the lever 23, and passes through an aperture 41 in a plate 35 horizontally slidable, by a knob 34, behind a fixed partition 9. The plate 35 controls the setting of the projector and is held by a spring 39 in the "still" projection position shown in Fig. 5; the lever 23 is then movable. Movement of the plate 35 to the left for "projection" position causes a lug 44 to obstruct the upward projection on the end of the arm 42 and prevent its movement and movement of the lever 23. The film claw may be withdrawn from the gate during threading by rotation of a thumbscrew 46, its withdrawn position being indicated when an arrow, on disc 45 rotated by the thumbscrew, points to a mark 47 on the link 30, the link being then in its normal position.
Patent GB-307298-A (GB)
Title: Transfer roller for printing irregular surfaces
IPC: B41F17/00
Filed: 1929-03-04
Abstract: 307,298. Masa Ges. zur Herstellung Kunstlicher Oberflõchen, (Assignees of Koch & Kienzle, Dr. Ing.). March 2, 1928, [Convention date]. Void [Published under Sect. 91 of the Acts]. Offset rollers.-A transfer roller for printing corrugated or irregular surfaces comprises a flexible printing-surface having a backing serving as a stiffener, and a pair of end discs to which the printing-surface is secured and of such a peripheral shape as to maintain the printing- surface in a form suitable to engage the irregularities of the surface to be printed upon.
Patent GB-1403961-A (GB)
Title: Treatment of hides
IPC: C14B1/58
Filed: 1973-02-13
Abstract: 1403961 Treatment of hides D POLVARA 13 Feb 1973 [17 Feb 1972] 6994/73 Heading C6C A machine for nailing and drying hides includes a drying oven 2 and guide rails for a plurality of expandable frames 6 for supporting and stretching out skins, first guide rails 3 being provided above the drying oven, second 4, and third 5, guide rails being located inside the oven on different planes and extending substantially parallel to the first guide rails, there being located at the ends of the guide rails kinematic assemblies 19 and 20 arranged to transfer the frames from the first guide rails to the second and third guide rails and vice versa, means being provided for expanding and contracting the expandable frames so as to stretch and relax skins supported thereon and means being provided for automatically opening grips connected to the frames for gripping the skins. The expandable frames include a fixed part with two axles, to the ends of which wheels arranged to run on the guide rails are rotatably mounted and a mobile part slidably associated with the axles by way of a rack provided with locking and disengagement members; and the means for expanding and contracting the frames is a hydraulic jack to which is connected a fork arranged to engage with the mobile part of one of the frames in order to move it away or towards the fixed part so as to stretch or relax a skin fixed to the frame.
Patent GB-1038163-A (GB)
Title: Flow shut-off valve
IPC: F16K17/24
Filed: 1963-02-21
Abstract: 1,038,163. Valves. BERG AIRLECTRO PRODUCTS CO. Feb. 21, 1963 [July 2, 1962], No. 7040/63. Heading F2V. Communication between an inlet 19 and an outlet 20 is interrupted on loss of pressure in the outlet by a valve comprising a stepped piston 11 with a circumferential groove 32, or a passage entirely within the piston, for interconnecting the inlet and outlet when the piston is in its uppermost position to which it is urged upon the initial application of pressure at the inlet by the action of such pressure in an annular chamber 21a connected by a passage 26 with the inlet. Outlet pressure acts through a passage 27 on the bottom of the piston, and is opposed by inlet pressure which has restricted access through a passage 34 to a chamber 11a above and within the piston. The piston, which together with the housing may be of metal or plastic material and has sealing rings 37, 38, 39 and top and bottom projections 41, 40, may be reopened after cutting off the supply and draining of the chamber 11a, or it may be opened manually by a plunger in which case a valve may be provided for relieving pressure from the chamber 11a.
Patent GB-1513082-A (GB)
Title: Device for cleaning windshields headlamp lenses rear view mirrors reflector means or the like of a vehicle
IPC: B60S1/54
Filed: 1976-02-23
Abstract: 1513082 Cleaning vehicle lamp glasses L A BERGKVIST 23 Feb 1976 [24 Feb 1975]  07102/76 Heading A4F Apparatus for cleaning head-lamp glasses, see Fig. I, comprises a steam generator 3, a container 1 for water, pump 4 and conduits 8, 11, the latter for supply of water to be mixed with the steam issuing from the generator and the former for discharging the steam/water mixture on to a head-lamp glass 10 in order to clean it. The water from container 1 is delivered to the steam generator and conduit 11  by means of pump 4, which may be hand or foot operated. A non-return valve 5 may be located between the pump and steam generator. The steam may be generated by means of the exhaust gases flowing through pipe 7. These gases may also be utilized in heat exchanger 14 for heating the water supplied via conduit 11 to conduit 8, and also for heating water in conduit 15 for cleaning other parts. In a modification, see Fig. 2, the steam may be generated by an electrical heating element 12, and separate pumps 4, 13 may be used for supply of water to the steam generator and conduit 11. The pumps may be co-operable. The water in container 1 may have an anti-freeze agent added to it. Separate containers may be used for supplying water to the steam generator and conduit 11, the former containing pure water and the latter water containing a cleaning agent and/or an anti-freeze agent. The appartus may be used for cleaning windshields as well as rear view mirrors.
Patent GB-988292-A (GB)
Title: Improvements in the production of a zinc oxide pigment
IPC: C09C1/04
Filed: 1963-02-20
Abstract: Zinc oxide pigment material, in which the individual particles consist of a core and a zinc oxide coating, is obtained by atmospheric oxidation of vaporized zinc and deposition of the zinc oxide, as it is formed, upon particles of an inert heat-resistant material, e.g. TiO2, SiO2, BaSO4 or mica.  Zinc vapour is produced by evaporation of zinc metal in a muffle furnace or by reduction of oxidic zinc material. The inert core material may be injected by a reducing gas into the zinc vapour or it may be charged during the subsequent oxidation step, the quantity of core variable between wide limits-for example an excess relative to the zinc oxide may be supplied.  In such a case one part of the overall pigment surface consists of ZnO and the rest, of the core material; this has particular application when the core is a second pigmentary material, e.g. TiO2.ALSO:Zinc oxide, which is formed in situ by the oxidation of zinc vapour, is deposited from the vapour phase on to particles of TiO2.SiO2, barium sulphate, micro talcum, or micro mica. The zinc vapour may be produced by evaporation of zinc metal in a muffle furnace or by reduction of oxidic zinc material.
Patent GB-175545-A (GB)
Title: Improvements in furnace fronts
IPC: F23C7/00
Filed: 1921-03-07
Abstract: 175,545. Howden & Co., Ltd., J., and Hume, C. W. March 7, 1921. Liquid-fuel furnaces.-The front of a liquid-fuel furnace comprises a front plate 1 and back plate 2 with interposed plates 3<1> arranged above and below the furnace opening and forming lateral air openings 3 controlled by valves 6 mounted on vertical axes. Air entering the openings 3 is deflected towards the furnace opening by curved plates 4 which are dished to accommodate a burner 5. The valves 6 may be interconnected so that they may be operated together or each valve may be operated independently.
Patent GB-581422-A (GB)
Title: Means for adjustably supporting a mirror from a wall fitting, cabinet or other base member
IPC: A47G1/24
Filed: 1944-04-19
Abstract: 581,422. Mirror supports. MODERN INDUSTRIES (LONDON), Ltd., and VINEY, H. S. April 19, 1944, No. 7256. [Classes 52 (i), 52 (iii) and 52 (v)] An adjustable mirror support comprises a primary linkage turnable about a vertical axis and arranged to allow the mirror to be swung outwards away from and inwards towards the base member and a secondary linkage including upper and lower members which are adjustable to tilt the mirror with respect to the vertical plane. As shown in Fig. 2 the cabinet 10 is provided with lugs 11 carrying rod 12 on which is pivotally mounted the primary linkage comprising plates 14, 22 which permits the mirror 25 to be swung away from the cabinet in a horizontal direction the mirror maintaining a position parallel to the front of the cabinet or functioning as a conventional hinged door. The secondary linkage as shown in Fig. 4 comprises U-shaped members 17, 21 of which member 17 is pivoted to plate 14 at 15 and member 21 is adjustable in the gapped bottom edge of plate 14 so that the mirror can be tilted in a vertical direction. In a modification shown in Fig. 9 the secondary linkage comprises a short U- shaped link 31 pivotally attached to the plate 14 by a stud 15 and a longer link 26, the sleeve 27 sliding on the rod 18, for adjustment with regard to the vertical plane.
Patent GB-1338970-A (GB)
Title: Time-division multiplex exchanges
IPC: H04Q11/04
Filed: 1972-02-17
Abstract: 1338970 Automatic exchange systems INTERNATIONAL STANDARD ELECTRIC CORP 17 Feb 1972 [22 Feb 1971] 7317/72 Heading H4K In a T.D.M. exchange including crosspoint switching arrays to which T.D.M. highways are connected, the crosspoint arrays being interconnected via links, the T.D.M. channels or time slots of each incoming/outgoing highway are divided into a number of sub-groups each of which includes only some of the channels of the highway, each sub-group of each highway being connected to a different one of said crosspoint arrays. The channels of each highway may be divided into n-sub-groups by a switching device and each highway connected to the switching array, excluding the links, is then a T.D.M. highway having the full number of T.D.M. channels but comprising n of said subgroups each of which sub-groups belongs to a different one of n of said incoming/outgoing highways. The arrangement is said to reduce the number of links required between crosspoint arrays. Transmission on the highways uses P.C.M. A simple arrangement is described which utilizes two crosspoint arrays KG1, KG2 and 72, 30 speech channel, T.D.M. highways S1-S72. Links ZL are provided between arrays. Normally highways S1-S36 would be connected to array KG1 and highways S37-S72 to array KG2 (Figs. 3 and 4, not shown), and connections between highways in different groups would require the use of a link ZL. In the present arrangement the highway are arranged in pairs, e.g. S1 with S37 and S36 with S72 &c., and are connected to a preliminary switching device which may be a 2 Î 2 crosspoint array. Each highway has its 30 channels divided into two sub-groups, channels 1-15 in one sub-group and channels 16-30 in the second sub-group. By use of the switching arrays KV1-KV36 each T.D.M. highway connecting an array, KV1-KV36, to one of the two main arrays comprises the first sub-group of one-of the highways S1-S72 together with the second sub-group of a different one of the highways S1-S72, e.g. the top highway (as shown in the Figure) into array KG1 would have 30 channels the first fifteen being channels 1-15 of highway S1 and their final 15 being channels 16-30 of highway S37, the channels 16-30 of highway S1 and channels 1-15 of highway 37 being likewise fed to array KG2. By this arrangement 15 channels of each highway have access to 15 channels of each of the other 71 highways in the same array. An example calculation given shows that for a given density of traffic this arrangement reduces the number of links ZL that are required. The switching devices, e.g. KV1-KV36, may form parts of the interface circuits by which the information on the TDM highways is synchronized to the exchange clock rate.
Patent GB-1377233-A (GB)
Title: Substituted para-fluorophenols and their use as cyan couplers
IPC: C07C205/26
Filed: 1972-02-17
Abstract: 1377233 Substituted para - fluorophenols EASTMAN KODAK CO 17 Feb 1972 [18 Feb 1971] 7336/72 Heading C2C [Also in Division G2] The invention comprises compounds of formula wherein each R<SP>1</SP> and R<SP>3</SP> is hydrogen or a C 1-4  alkyl group; R<SP>2</SP> is an aryloxyalkylcarbonamido group, the aryl group of which may be substituted; R<SP>4</SP> is an aryl- or alkyl-carbonamido group or an arylureido group, the aryl and alkyl groups of which may be substituted; and L is a group of formula -NH-CO-Ph-CO-NH-, -NHCONH-, -NHCO(CH 2 ) 9 -CO-NH- or -NH-CO-Ph-SO 2 -NH-, wherein Ph is a 1,4-phenylene group and q is 1 to 7. The above compounds may be obtained from pfluorophenol through the following reaction steps:-The p-fluorophenol is converted in the 2-position to a nitro derivative, this intermediate is converted to the corresponding 2- methyl-5-fluorobenzoxazole by catalytic reduction followed by cyclization with triethylorthoacetate. The resulting 2-methyl-5-fluorobenzoxazole is then nitrated with an HNO 3  and H 2 SO 4  acid mixture and hydrolysed to obtain 2-amind-4-fluoro-5-nitro phenol. This intermediate is reacted with an equimolar amount of an appropriate acid chloride in a solvent for 1 hour at room temperature and then poured into a dilute solution of HCl at about 0‹ C. The resulting 2-acylamino-4-fluoro-5-nitrophenol is then finally converted to the desired 2-acylamino - 5 - amino - 4 - fluorophenol by catalytic hydrogenation. Example I describes the preparation of 2-pentafluorobenzamido-4-fluoro- 5-[α-(2,4 - di - t - amylphenoxy) hexanamido] phenol. In its preparation the following intermediates are isolated: 2-nitro-4-fluorophenol; 2 - methyl - 5 - fluorobenzoxazole; 2 - methyl - 5- fluoro - 6 - nitrobenzoxazole; 2 - amino - 4- fluoro - 5 - nitrophenol; 2 - pentafluorobenzamido - 4 - fluoro - 5 - nitrophenol and 2 - pentafluorobenzamido - 5 - amino - 4 - fluorophenol.
Patent GB-1499022-A (GB)
Title: Water washable dye penetrant composition and method for utilizing same
IPC: C09D5/00
Filed: 1975-02-21
Abstract: 1499022 Detecting cracks and flaws ROCKWELL INTERNATIONAL CORP 21 Feb 1975 [21 Feb 1974] 7399/75 Heading G1S [Also in Division C4] Cracks and flaws in the surface of an object are detected by applying to the surface a water washable liquid dye penetrant composition comprising (1) a nonionic surfactant in the form of a polyethoxylate of a G 1  -G 5  linear secondary aliphatic alcohol or a mixture thereof, the average number of ethoxylate groups in the surfactant being from 3 to 12 and (2) a dye soluble in the surfacant, the surfactant being essentially the sole surface active liquid carrier for the dye, removing the dye penetrant composition from the surface without removing the dye penetrant composition from any cracks and flaws in the surface, and viewing the surface of the object under lighting conditions to obtain coloured traces from the dye in the cracks and flaws. The dye is preferably a fluorescent dye.
Patent GB-557791-A (GB)
Title: Improvements in or relating to electrical relay circuits
IPC: H01C7/04
Filed: 1942-06-02
Abstract: 557,791. Electric selective signalling. STANDARD TELEPHONES & CABLES, Ltd., McWHIRTER, E. M. S., WOLFSON, H., DUNN, R. H., and SHEPARD, S. C. June 2, 1942, No. 7455. [Class 40 (i)] [Also in Group XXXIX] A signal-receiver circuit comprises a negativetemperature-coefficient-thermistor associated with a constant resistance and a source of current to give a relay action. The combined current voltage characteristic of the thermistor and resistance is of the form shown by the curves D, D1, which comprise a portion having a positive slope which is indistinguishable from the corresponding portion of the characteristic A of the thermistor alone. Initial conditions are represented by a point near the top P of this portion. Signals, by increasing the heating of the thermistor or the voltage across it, bring conditions past the point P so that the current suddenly changes to that indicated by a point such as N on the positive slope on the right. In the application of the invention to directcurrent signalling over A.C. power mains as described in Specification 472,431, the thermistor heater r is in series with the secondary winding of a transformer, the initial voltage across the thermistor being obtained from a tapping G on the same transformer. Normally the current in the heater is negligible, but when a direct voltage is applied to the mains at the transmitter, the thermistor is heated and the current through it is suddenly changed and operates relay D. To restore the initial conditions, the contact k is opened by a relay (not shown).
Patent GB-168615-A (GB)
Title: Improvements in milling tools
IPC: B23C5/22
Filed: 1921-01-12
Abstract: 168,615. Couldwell, A. C. S. Jan. 12, 1921. Milling-cutters.-In milling-tools having independent cutters assembled in helical grooves and locked by abutting set-screws in end plates, the grooves, cutter-roots, and distance-pieces are each dovetailed and a flat spring is inserted under each end cutter and its adjacent distance-piece. The cutters c, which fit in the dovetailed helical grooves a, are locked by end nuts e, through one of which pass set-screws f applying end pressure to the elements of each groove. The end cutter and distance-piece of each groove are additionally secured by an upward reaction effected by the pressure of a grub-screw k on a cantilever-spring i. Thin tapered wedges may be interposed between the roots of the cutters and distance-pieces, and in addition, the end distance-piece may be formed in two parts.
Patent GB-199126-A (GB)
Title: Improvements in or relating to safety apparatus for railways
IPC: B61L3/04
Filed: 1922-03-15
Abstract: 199,126. Gibson, W. R., and Johnston, T. A. March 15, 1922. Track apparatits actuating signals on trains and for stopping trains.-An arm 12, having extensions 13, 14 engages one of two switches 21 on the locomotive when the semaphore is at ' danger so as to operate an audible signal 26 and visual signals 27<a> or 33 according to which switch is closed. A battery 29 in connection with each switch is in series with each set of visual indicators, and the audible signal is common to both circuits. Brake or throttle valves may be operated by devices in the circuits. The switch arm 21 has cushions to absorb the shock of impact with the arm 12, and is reset by hand.
Patent GB-512688-A (GB)
Title: Improvements in and relating to hydro-turbine pumps
IPC: F04C19/00
Filed: 1938-03-11
Abstract: 512,688. Rotary pumps. NORMAN, E. J. H., and TOMPKINS, W. C. March 11. 1938, No. 7609. [Class 110 (i)] In a water-ring pump having a rotor 3 mounted on conical port member 15 within an eccentric stator providing one lobe or. crescent-shaped chamber, the inlet and outlet ports in the member 15 extend over arcs not less than 110 degrees and 70 degrees, respectively..The tips of the rotor vanes are curved.