baber/WOPTO huggingface dataset:
Patent GB-1322962-A (GB)
Title: Photographic exposing and developing apparatus
IPC: G03D13/00
Filed: 1970-09-02
Abstract: 1322962 Photographic apparatus EASTMAN KODAK CO 2 Sept 1970 [2 Sept 1969] 41933/70 Heading G2A In a camera for exposing and developing a web of sensitive material, the web can be transported at one of two different speeds. The camera 12 is mounted above a cathode ray tube display device 90, the image on the display screen being reflected into the camera by the arrangement described in more detail in Specification 1319277. The web is provided as a continuous reel 30, a predetermined length being fed by metering rollers 32, 33 to an exposure station 20. After exposure web transport is resumed, and a further length fed into the exposure station while the previous length is severed by a cutting assembly 38 and advanced by drive rollers 45, 46 to a heatting station 54. Here it is guided round a drum 56 by a guide plate 58 which also contains the heating elements. The sheet is now advanced by drive rollers 68, 69 to a developing station 74 where it is held in contact with a rotating drum 76 by a belt 84. The drum is transparent, and illuminated from within by ultra-violet lamps 78, so developing the latent image on the sensitive sheet, which is then stripped away from the drum by fingers 82 and directed through an exit opening 88 in the camera housing. The various operations are controlled by a low-speed motor 120 and a high-speed motor 117, Fig. 2 (not shown), which may be selectively coupled to a main drive shaft (123) which is itself selectively clutch-connected to a timing shaft 143. Shaft 143 carries a series of timing cams 145 etc. which control the actuation of a corresponding series of timing switches. Initially, a length of material is advanced into the exposure station, and the shutter 18 actuated to effect an exposure. The length of material is now severed and advanced at the higher speed until it is within the heating station 54, when the speed is changed to the lower value. After passing through the heating station at the lower speed, it is advanced at the higher speed to the developing station 74 through which it then passes at the lower speed again. It is then advanced at the higher speed once more to the discharge opening 88. The entire sequence of operations is controlled automatically by the circuit of Fig. 3 (not shown).
Patent GB-1267890-A (GB)
Title: Safety link, particularly for mountaineering use
IPC: F16B45/02
Filed: 1970-09-02
Abstract: 1,267,890. Hooks. SALEWA LEDERWARENFABRIK G.m.b.H. 2 Sept., 1970 [3 Sept., 1969], No. 41979/70. Heading E2A. A hook-link for rope-climbing and having a hinged mousing piece, is made of hollow section for strength. Tubing is bent into a partial 'D' 23 and its ends 24, 25 are flattened. One is slotted at 26 and the other bored at 27 to receive the hinge-pin 32 of the mousing- piece 29. As shown, the mousing-piece is hollow and houses a spring 34, abutting a fixed pin 35 and loading a plunger 33 which acts to urge the mousing-pin into its closed position in which pin 30 engages the slot 26. The opposed faces 39, 40 of the hook and mousing piece converge towards each other so that if the limb 21 is distorted by load, edges 41, 42 come into engagement to brace the hook.
Patent GB-1219440-A (GB)
Title: Cutter assemblies
IPC: A01D34/83
Filed: 1968-09-04
Abstract: 1,219,440. Mowing machines. OMARK INDUSTRIES Inc. 4 Sept., 1968 [14 Sept., 1967], No. 42119/68. Heading A1F. A cutting assembly comprises cutters attached to an endless belt 22 so that the cutting plates 28 of the cutters 24 extend outwardly from the outer face of the belt and are inclined relative to the horizontal plane through the pitch line of the belt. Each cutter 24 is formed by bending a sheet metal blank and includes a body portion 26 which is attached to the belt and a cutting plate 28. The cutting plate 28 forms a slightly obtuse angle with the body portion 26 and is tilted relative to the horizontal plane 29. A forward surface 30 of the cutting plate is parallel with plane 29 and together with face 32 defines a swept back cutting edge 34. The surface 30 is sharpenable as it passes a sharpening member. The cutters 24 are secured to the belt 22 by rivets 42. In other embodiments the cutters are secured to the belt 22 by means of one rivet and a corner tang cut out and bent from the body portion 26 and embedded in the belt to enable it to flex naturally; or by a central rivet and keying tangs on the ends of the body portion; or by a central rivet and a thin rubber adhering layer vulcanised to the outer face of the belt and to a face on the body. Further embodiments include a cutting plate with a rounded anchor or tang embedded in a slot in the belt and preferably vulcanised to it. An anchoring pin also embedded in the belt is inserted in a hole in the anchor.
Patent GB-936350-A (GB)
Title: Means for filling fountain pens
Inventor: COLES JOHN ERNEST
IPC: B43K5/04
Filed: 1960-12-13
Abstract: 936,350. Reservoir pens. M. MYERS & SON Ltd. Nov. 22, 1961 [Dec. 13, 1960; Jan. 6, 1961], Nos. 42853/60 and 619/61. Class 146 (3). A reservoir sac-filled pen has a tubular sheath 10 enclosing the sac 11 apart from an elongated slot 12 providing access to a presser bar 14 for collapsing the sac. The presser bar 14 is secured to the sheath, e.g. by engagement with a slot 13, Fig. 1 (not shown), apertures 17, Fig. 4 (not shown), or a slot 20, Fig. 8 (not shown).
Patent GB-1474508-A (GB)
IPC: H02P25/08
Filed: 1975-10-22
Abstract: 1474508 Control of variable reluctance motors FORD MOTOR CO Ltd 22 Oct 1975 [19 Dec 1974] 43339/75 Heading H2J A control circuit for a variable reluctance motor having a winding 10 comprises a solid state switching device 32, 34 having a control electrode and an output circuit connected in series with winding 10 to control flow of current therethrough, and a circuit for sensing the EMF induced in the winding 10 while the motor is rotating and the switching device is non-conductive and for rendering the switcing device conductive whenever the EMF is increasing and crosses a predetermined reference potential about which it oscillates. The waveform of Fig. 2(b) shows the EMF induced and the reference potential and Fig. 2 (a) shows the time variation of the motor inductance. The generated EMF is picked up at 14 and applied to one input of a comparator 66, the other input of which receives the reference potential. During the interval t 0 -t 1  the output of comparator 66, Fig. 2(d) is low which causes a transistor 54 to be nonconductive which renders transistors 32, 34 nonconductive. When the EMF increases to the reference potential, the comparator 66 output goes high. This causes a comparator 84 to trigger a transistor 114 which causes a high potential to be applied to the one input of comparator 66 thereby latching it in its present condition. Also, transistor 54 is rendered conductive, via a comparator 88, which in turn renders transistors 32, 34 conductive to supply current to the winding 10. At time t 1 , a capacitor 100 starts to charge at a rate determined by resistors 96, 98, and when the charge reaches a level set by a potentiometer 76, the comparator 88 renders transistor 54 nonconductive which turns off transistors 32, 34 at t 2 . The latch signal of comparator 66 is removed at time t 3 . The time constant of circuit 96, 98, 100 determines the maximum motor speed.
Patent GB-1071560-A (GB)
Title: Process for the production of printing plates
IPC: G03F7/038
Filed: 1964-10-23
Abstract: 1,071,560. Etching. KALLE A.G. Oct. 23, 1964 [Oct. 26, 1963], No. 43386/64. Heading B6J. [Also in Division G2] An etching solution for a copper foil on a polymeric backing comprises calcium chloride, ferric chloride, cupric chloride, nitric acid and hydrochloric acid and an etching solution for copper which has been vacuum deposited on a polymeric support comprises calcium, ferric and cupric chloride and nitric acid. An etchant for chromium is calcium chloride, glycerine and hydrochloric acid.
Patent GB-1421978-A (GB)
Title: Production of tubular film
IPC: B29C48/90
Filed: 1973-09-17
Abstract: 1421978 Tubular films; cup seals IMPERIAL CHEMICAL INDUSTRIES Ltd 2 Aug 1974 [17 Sept 1973] 43477/73 Headings B5A and B5B In an apparatus for extruding and blowing a tubular film a cup seal 7 is disposed downstream of the extruder between the cooling mandrel 4 and the distributor 16, the seal engaging peripherally the internal surface of the tube and presenting a concave surface to the mandrel. The cooling mandrel may be dry or may be cooled by water supplied by maintaining a small-head of water in space 5 and being carried down between the mandrel 4 and tube 1 into space 6. Additional cooling may also be effected using a water jacket 9. The cup seal may be of a resilient material optionally reinforced and may have a form as shown in Figs. 4-9.
Patent GB-1591029-A (GB)
Title: Hematology parameter measuring apparatus
IPC: A61B5/145
Filed: 1976-10-20
Abstract: This analyser has a recording apparatus (16) with counters (17-20) for measured blood values, a display unit (38) and a computer (42). This analyser can be used to measure, for example, the red and white blood count, haemoglobin and haematocrit. Before the digital pulses of blood values measured by the recording apparatus (16) and of the blood values calculated by the computer (42) are fed to a printer (44) the relevant blood values can be read off the display unit (38). This permits a considerable saving of report cards. <IMAGE>
Patent GB-934998-A (GB)
Title: Centrifugal separator
IPC: B04B1/20
Filed: 1961-12-06
Abstract: 934,998. Centrifugal separators. BIRD MACHINE CO. Dec. 6, 1961 [Jan. 11, 1961], No. 43770/61. Class 23. In a centrifuge for separating solid particles from liquid and comprising a rotatable bowl 20 having a plurality of ciroumferentially spaced longitudinally extending strips 88 on its inner surface, a solids discharge chamber 68 at one end of the bowl and a helical conveyer coaxially mounted within the bowl and rotatable at a speed different from that of the bowl whereby separated solid particles are moved by conveyer towards the solids discharge chamber, the inner surface of the bowl between the strips 88 is of hard smooth material and the height of the strips and the clearance of the conveyer therefrom are so regulated in relation to the particle size of the solids to be treated that the force exerted by the conveyer on the beds of solid particles deposited between the strips is sufficient to slide them longitudinally along the bowl to the discharge chamber. The bowl drive sleeve 18 is connected to a belt-driven sheave 24 and the conveyer drive shaft 36 is driven from the bowl through gearing 30. The conveyer comprises a casing 38 supporting a helical conveyer belt 40. The slurry enters through a fixed feed pipe 52 and is discharged through an opening 55 and ports 56 to the bowl where the separated solid particles are carried along the bowl by the conveyer and discharged through ports 70 to the chamber 68 whilst the liquid flows over an adjustable dam 78 to a chamber 76. The bowl comprises an outer wall 80 and a liner 84 of hard smooth-surfaced material, preferably coldrolled stainless steel, the strips 88 and liner 84 being secured together and to the wall by bolts 82. In a modification, Fig. 6 (not shown), the liner and strips are confined to the frustoconical portion of the bowl and the strips are helical. If desired, the liner may be dispensed with. Instances of suitable strip heights and conveyer clearances are given in the Specification. Specification 667,594 is referred to.
Patent GB-1392399-A (GB)
Title: Clutches
IPC: F16D23/14
Filed: 1972-09-21
Abstract: 1392399 Clutch control SKF INDUSTRIAL TRADING & DEVELOPMENT CO NV 21 Sept 1972 [21 Sept 1971] 43799/72 Heading F2C In the clutch release bearing shown, wherein a release member 6 of the clutch is engaged by a ring 5 to which the inner race 3 of the bearing is attached, to release the clutch, an operating member 7, moved by a release fork (not shown) to disengage the clutch, is attached to a flange 11 of the bearing housing by members 12 passing through apertures therein and through apertures in a flange 7a of the member 7, the apertures in one member being of greater diameter than members 12 to permit relative radial movement. Each member 12 is resiliently held in position by a spring washer 14. The holes may be replaced by slots.
Patent GB-1015079-A (GB)
Title: Fumaric and maleic acid dinitrile
Filed: 1964-10-30
Abstract: A process for the production of fumaric and/or maleic dinitrile comprises treating succinonitrile with a gas containing oxygen or air, at elevated temperature, in the presence of at least one oxide, stable at reaction temperature, of a metal of Group V and/or Group VI of the Periodic Table, which may be supported. Specified oxides are vanadium pentoxide, molybdenum trioxide and chromic oxide; an alkali metal hydroxide may also be present. The reacting gases may contain water, and waste reaction gas may be recycled.ALSO:A catalyst suitable for the production of fumaric and/or maleic dinitrile (see Division C2) comprises at least one oxide of a metal of Group V or VI of the Periodic Table (e.g. vanadium pentoxide, molybdenum trioxide or chromic oxide), which may be supported, e.g. on moulded silica gel.  Alkali metal hydroxides may also be present.  The catalyst may be regenerated after use by treatment with air at 400-650  DEG C.  In examples, silica gel bars are impregnated with aqueous solutions of (1) CrO3+KOH; (2) CrO3+(NH4)2MoO4+KOH; and (3) CrO3+NH4VO3+KOH, followed by drying at 120  DEG C. and heating at 450  DEG C.
Patent GB-1069767-A (GB)
Title: Polymeric reaction products of tertahydrofuran and dicarboxylic acid cyclic anhydrides and a method of preparing the same
IPC: C08G63/58
Filed: 1964-10-30
Abstract: Polymers are obtained by the reaction of tetrahydrofuran with a cyclic dicarboxylic acid anhydride.  Suitable anhydrides are those of maleic, succinic, phthalic, dihydrophthalic, tetrahydrophthalic, hexahydrophthalic and endomethylenetetrahydrophthalic acids, which may be substituted by halogen or hydrocarbon groups.  The polymers may be prepared in the presence of an organometallic compound RnM, where M is a metal of Groups I, II or III of the Periodic Table, R is hydrogen, halogen, hydroxy, alkoxy, alkyl, cycloalkyl, aryl, aralkyl or alkaryl, at least one R being a hydrocarbon group, and n is 1, 2 or 3, the valency of the metal, preferably also in the presence of 0.1 to 5 mols. per mol. of organometallic compound of an active hydrogen compound, e.g. water, an alcohol, an amine, or a thiol, and/or a compound capable of forming an oxonium or carbonium ion, e.g. propylene oxide, epichlorhydrin, acetyl chloride, acetic anhydride or benzyl chloride. Suitable organometallic compounds are n-butyl-lithium, dimethylzinc, diethylzinc, trimethylaluminium, triethylaluminium and tri-isobutylaluminium. About 0.1-10 mol. per cent of organometallic catalyst may be used based on the total monomer. An inert solvent, e.g. dioxane, toluene, or benzene, may be used. In examples, tetrahydrofuran is polymerized with phthalic anhydride or endomethylenetetrahydrophthalic anhydride in the presence of triethylaluminium, water and propylene oxide, epichlorhydrin or acetyl chloride.  (Assuming all the anhydride to be consumed the yields suggest ratios of tetrahydrofuran to anhydride residues in the products of 1-4: 1).  The products are insoluble in methanol, acetone and hexane.
Patent GB-1061028-A (GB)
Title: Process and apparatus for the extraction of a soluble fat constituent of a solid material
IPC: C11B1/10
Filed: 1963-11-11
Abstract: <PICT:1061028/C4-C5/1> <PICT:1061028/C4-C5/2> Soluble fat constituent are extracted from solid material containing them by pumping the solid material between a tubular conduit and a tubular filter, one of which is enclosed within the other, the filter being impervious to the solid material, and passing a solvent under pressure through apertures spaced along the conduit wall, through the material and through the filter wall, the solvent being in liquid and/or vapour phase.  As shown in Fig. 1, solid material to be treated is supplied at feed screw 6, is passed upwardly through the column by main vertical feed screw 4 and is discharged via screw 7.  The outlets of screws 6 and 7 are smaller than the inlets thereof.  By adjustments of the speed of the feed screw 6, screw 4 and the inclination of the blades of the wheel 10 the rate of passage and condition of the material can be controlled.  Solvent is introduced under pressure through apertures in tubes 8 and 9, through the apertures in the screw 4, into the solid material to extract the fat constituents therefrom, the resulting solution filters through the filter 5 and is collected and taken off through outlet 18.  Filter 5 may be constructed of perforated coaxial tubes 13 and 14 filled with porous porcelain or sintered metal plates.  In a modification (Fig. 2) a hollow helical member 20 is disposed between screw 4 and filter 5. The member 20 rests on plate 21 and is rotated in a direction opposite to screw 4.  Hence the solid material moves upwardly continuously and without slipping or blockage in the column. A plurality of such units may be used in series. Solid materials treated are crushed oil seeds, fish waste, animal bones and officinal plants, and solvents used include hexane, trichloroethylene and carbon disulphide.
Patent GB-1358259-A (GB)
Title: Formation of relief images
IPC: G03C5/56
Filed: 1970-09-18
Abstract: 1358259 Photo-sensitive materials for colour processes; stopping films AGFA-GEVAERT 19 Aug 1971 [18 Sept 1970] 44668/70 Heading G2C A photo-sensitive material contains a layer with (a) at least one organic halogen compound which releases halogen free radicals on exposure, (b) at least one arylamine or heterocyclic compound containing nitrogen in the ring which is aromatic in character, (c) gelatine and uniformly dispersed therein (d) an organic pigment which is inert and diffusion resistant which uniformly colours the layer. This material may be imagewise exposed which prevents the polymer being hardened, treated with an aldehyde to harden the unexposed areas and removing the unhardened areas to produce a positive coloured relief image. The invention also relates to a process for producing relief images which comprises imagewise exposing the material as above except that (c) may be any hydrophilic colloid and (d) may be absent or be a dye, treating the exposed material with an aldehyde hardener to harden the unexposed areas and washing off the exposed areas. The material is preferably used in colour proofing wherein the light-sensitive layer containing a cyan pigment is applied to a temporary support of unsubbed cellulose triacetate and optionally overcoated with a light-sensitive layer which is identical except that it contains silica particles instead of the cyan pigment. The two layers are transferred under pressure to a wetted permanent support which may be a support subbed with a polymeric layer containing TiO 2  as disclosed in Specification 1234755. The material is exposed to the appropriate colour separated half tone positive and developed as above. The process is repeated using yellow, magenta and black pigments in the light-sensitive layers which are applied to temporary supports before being transferred to the permanent support containing at least the positive cyan image to produce a 4-colour proof. The layer preferably contains (a) carbon tetrabromide (b) N-vinyl carbazole (c) gelatine and (d) pigments specified above but may contain a sensitizer for visible light such as a styryl dye base. Gelatine may be replaced by polyvinyl alcohol or polyacrylamide.
Patent GB-945270-A (GB)
Title: Balanced frequency detector circuit
IPC: H04J1/20
Filed: 1961-12-14
Abstract: 945,270. Multiplex radio signalling. HAZELTINE CORPORATION. Dec. 14, 1961 [Jan. 24, 1961], No. 44855/61. Heading H4L. In a receiver for a multiplex system of the type described in Specification 945,267 wherein a main carrier is frequency modulated by a sub-carrier and both the sub-carrier and the main carrier are modulated by respective audio-frequency signals the frequency detector for the sub-carrier signal is provided with a modified arrangement for removing an unwanted amplitude modulation signal. In the embodiment described, one audio-frequency signal is the L + R signal in a stereophonic system and modulates the main carrier, and the other signal is the L - R signal modulating the subcarrier, the composite signal being supplied via receiver 11 to a frequency detector 12 and the L+R signal being filtered off at 13 and supplied via sum and difference matrix 14 to the output SR. A filter 15 selects the sub-carrier signal, which may carry unwanted amplitude modulation, and is supplied to a variable threshold limiter comprising diodes 18, 19, having a time constant circuit 21, 22 arranged so that long-term variations in the amplitude of the composite signal at the output of frequency detector 12 which result in variations of the signal L+R are accompanied by corresponding variations in the signal L - R so that the relative values of the two signals are maintained. It is assumed that the limiter will not suppress all amplitude modulation, and the diode 18 and resistor 20 form an amplitude detector detecting this unwanted signal. The frequency detector includes a pulse counter circuit 23 as described in Specification 945,268, which derives from the limited signal a train of pulses having an average amplitude component determined by both the frequency and amplitude modulation of the sub-carrier. In the pulse counter the pulses are differentiated by circuit 24, 25 and diode 27 removes the positive pulses. Inductor 28 shapes the differentiated pulses to increase their area and with diode 18 provides a sharp cut-off at the end of each pulse. Circuit 29, 30 provides deemphasis and smoothing. By suitably choosing the value of resistor 20 the voltage detected by diode 18 may be arranged to balance out the amplitude modulation component of the output of frequency detector 23. A capacitor 32 by-passes the sub-carrier frequency. Specification 945,269 also is referred to.
Patent GB-1023505-A (GB)
Title: Process for removing free nitrogen from steel
IPC: C21D3/08
Filed: 1962-11-30
Abstract: Rimming steel sheet is annealed in proximity to an aluminium-killed steel sheet to remove free nitrogen from the former.  The two types of sheet may be alternated, or a sheet of killed steel may be clamped between two sheets of rimming steel; alternatively the two types may be formed into a common coil.