baber/WOPTO huggingface dataset:
Patent GB-1468894-A (GB)
Title: Video signal reproducing apparatus including a gain control device
IPC: H04N9/793
Filed: 1974-06-05
Abstract: 1468894 Automatic gain control; colour television SONY CORP 5 June 1974 [8 June 1973] 24979/74 Headings H4F and H4R In an automatic gain control system for the output of a multi rotary head video reproducing apparatus, a pilot signal, e.g. derived from the amplitude of the colour burst signal, is applied across a parallel circuit comprising a number of series circuits, one for each head of the reproducing apparatus, each comprising a switching device in series with a capacitor, the switching devices are rendered conductive in synchronism with the switching into operation of the corresponding reproducing head, and the signal across the parallel circuit is used to control the amplitude of the reproduced signal. As described with respect to Fig. 3 the outputs from reproducing heads 1A and 1B after amplification are alternately switched by switch 4 to feed low pass filter 12 and high pass filter 5 to separate the chrominance signals and luminance signals. The luminance signal from filter 5 is limited at 6, demodulated at 7, filtered at 8, and applied via a delay line 9 to an adder circuit 10 and to a sync. separator 21 and shaper 22 for application to a colour burst gate 35. The chrominance signal from filter 12 is fed through gain control circuit 13 to a frequency changer 14 so that the signal is changed to have a colour sub-carrier frequency of 3À58 MHz. The chrominance signal is fed to the adding circuit 10, to provide the apparatus output, and also to the colour burst gate 35, so that the colour burst is extracted. The colour burst is utilized in phase comparator 17 to ensure that the colour sub-carrier is exactly 3À58 MHz, the frequency of oscillator 16, and is also fed, both direct and via a limiter circuit 36, to a synchronous detector 37 serving as an amplitude detector for the colour burst signal. The resulting D.C. signal, which is dependent on the colour burst signal amplitude is applied to the parallel combination of capacitors 32A and 32B respectively in series with switching f.e.t.'s 30A and 30B. Transistors 30A and 30B are alternately rendered conductive by the complementary outputs of bi-stable 29 in synchronism with the switching of the rotary heads so that the colour burst amplitude level signals from each head are stored on the respective one of capacitors 32A, 32B. The voltage stored on the appropriate one of the capacitors 32A and 32B which is connected in circuit at any one time controls the impedance of f.e.t, 40, which is the gain controlling element in the chrominance signal amplifier 13. In a modified system, Fig. 5 (not shown), separate gain controlled amplifiers (13A and 13B) are provided in the feeds from the reproducing heads 1A, 1B to the switching circuit 4 so that gain control is provided on both the luminance and chrominance signals.
Patent GB-1042635-A (GB)
Title: Functional fluids
Inventor: COFFIELD T H
IPC: C10L1/10
Filed: 1963-06-24
Abstract: Hydraulic fluid, lubricating oil, grease and transformer oil compositions comprise (1) an oil (2) 0.001-2 wt. per cent of a bis-phenol of formula <FORM:1042635/C4-C5/1> in which R1-4 are C3-8 alkyl groups are branched on the carbon atom alpha to the ring and (3) 0.1-5 wt per cent of a compound which reduces the surface tension of the oil, has boiling-point above 200 DEG  F. at 1 mm. pressure, and contains at least one alkyl, aryl, alkaryl or aralkyl radical which is connected through a sulphonate, hydroxyl, or mercaptan radical to at least one Al, Ca, Li, Ba, Sr or Mg atom.  Suitable components (3) include normal and overbased petroleum sulphonates, phenates and phenate sulphides.  The oil (1) may be a mineral or synthetic oil, including diesters, and the compositions may also contain one or more of a wide variety of conventional additives, which are discussed in great detail.
Patent GB-250028-A (GB)
Abstract: 250,028. Breffit, W. April 24, 1925. Fuel-economizers.-A fire-clay block, to be placed at the back of a firegrate, with a clear air space behind it, is formed with a series of vertical grooves extending from the bottom nearly to the top of the front face, and has a number of .conical holes extending from the grooves to the back.
Patent GB-599992-A (GB)
Title: Improvements relating to variable speed gears for cycles and the like
IPC: B62M9/1248
Filed: 1945-09-27
Abstract: 599,992. Variable-speed chain gearing. FITZPATRICK, H., and FITZPATRICK, A. A. Sept. 27, 1945, No. 25072. [Class 80(ii)] In a variable-speed gear of the type where a chain is transferred from one sprocket to another for gear changing purposes, such as described in Specification 571,608, the chain tensioner is arranged for maximum tension when the chain is on the smallest sprocket and conversely. A chain transfer sprocket B is mounted on a crank D, D<SP>1</SP> having a stud D<SP>2</SP> with a spiral groove engaged by a peg (not shown) in a fixed bush F, so that rotary movement of D<SP>2</SP> is accompanied by lateral movement of the sprocket B. Journalled on D<SP>1</SP> and on D3 rigid with crank D is an arm E<SP>4</SP> carrying a tension sprocket E<SP>5</SP> and having a tubular extension E with a slot E<SP>3</SP> in which is fixed one end of a volute spring G<SP>1</SP>. The outer end of the spring G<SP>1</SP> is fixed to a casing J screwed to the end of the sleeve D<SP>3</SP> and having a control cable K. When tension is applied to the cable K, the transfer sprocket B is moved laterally to move the chain C on to the small sprocket A<SP>2</SP> and the casing J is rotated to increase the tension in spring G<SP>1</SP> and thus, through the lever E<SP>4</SP>, to increase the chain tension.
Patent GB-1236692-A (GB)
Title: Improvements in or relating to racks for phonograph records
Inventor: HERRLI HANS
IPC: A47B81/06
Filed: 1969-05-16
Abstract: 1,236,692. Box files. H. HERRLI, and P. HERRLI. 16 May, 1969 [4 Oct., 1968], No. 25099/69. Heading B6E. [Also in Division A4] A gramophone record holder of plastics comprises a top bracket 7 having holes (4) for screws (3) for mounting on a wall, vertical members 8, a lower channel 14 and an upper channel 16, members 8 having leaves 12 bearing on abutments 13 in sockets 11 of channels 14, 16, and channel 16 being hinged to bracket 7 by a reduced portion 17. Record jackets (18) are received on edge in grooves 21 in channel 14 and retained upright by a lip 19 of channel 16. A side member 23 extends from one member 8, and a detent 27 on lip 19 is engageable in a socket 28 on member 23. Labels may be applied to the lower surface of channel 16. A modified holder (Fig. 4) has a front panel hinged to the lower channel 14 and connected to the side member 23 by a folding stay (31).
Patent GB-438623-A (GB)
Title: Improvements in connection with locks and latches
IPC: E05B15/00
Filed: 1934-09-01
Abstract: 438,623. Locks and latches. PARKES, S. R., Pretoria Works, New Road, Willenhall, Staffordshire. Sept. 1, 1934, No. 25210. [Class 44] [See also Group XXII] A follower for locks, latches, &c., or a catch operated by a square key, is made in three parts by press operations from metal sheet or strip, a central portion 1 or 5 forming the follower or catch itself and two circular members 3 or 7 forming the trunnions which are riveted or spot-welded to the central portion. A follower or catch with a single bearing may be formed by securing two discs of unequal size to one side of the follower or catch, the larger one outside,to engage aplate of the lock.
Patent GB-868481-A (GB)
Title: Improvements in or relating to reserpine and its derivatives
Filed: 1958-08-06
Abstract: Reserpic acid lactone is prepared from the perchlorate of the lactone of 18b -hydroxy-11, 17a - dimethoxy-16- carboxy-3,4- dehydro-20a -yohimbane by hydrogenating in an inert solvent, e.g. aqueous tetrahydrofuran using a platinum catalyst, and isomerizing the resultant isoreserpic acid lactone by heating for a short time in an aliphatic carboxylic acid containing up to six carbon atoms. Examples detail the preparation of the isoreserpic acid lactone and its isomerization with formic, acetic and propionic acids. Specifications 868,475 and 868,480 are referred to.  Reference has been directed by the Comptroller to Specification 799,272.
Patent GB-924120-A (GB)
Title: Rotary motor driven rotary switch
IPC: H01H19/56
Filed: 1960-07-20
Abstract: 924,120. Snap-action switches. MASON ELECTRIC CORPORATION. July 20, 1960 [Jan. 11, 1960], No. 25253/60. Class 38 (5). A rotary switch comprises one or more annular housings 16 carrying pairs of fixed contacts 32 recessed to receive bridging rollers 36 resiliently mounted in and supporting respective annular rotors 42 which are operated by a reversible electric motor 12 accommodated therewithin and coupled thereto by resilient lost-motion torque-multiplying means including a cylindrical actuator 54. Actuator 64 is coupled to rotors 42 by springs 58 and to the motor shaft 76 by arms 98 and mechanism within the coupling housing 22. The annular housings 16 are clamped between the coupling housing 22 and an end cover 20 by means of studs 24 and nuts 26. When motor 12 is energized it rotates U-shaped member 78, one arm 80 of which first engages one end of spring 88 and then one end of slot 82 in a member 84 which is thus rotated. Thus lost-motion allows motor 12 to develop peak torque before cylindrical cam elements 86 mounted on member 84 engage levers 94, pivoted at 96 in the housing 22 (only one lever being shown in diagrammatic, Fig. 4). As levers 94 are then moved they act on the ends of arms 98 with increased torque and thus turn the actuator 54. Pins 50, fixed in the rotors 42, support springs 48 which press against pins 52 and on to contact carriers 40 to urge rollers 36 against the contact, track of housing 16. Each pin 50 also supports two springs 58 tensioned in opposite directions against pin 52 and having their other ends 62 extending through holes 64 in the actuator 54. When actuator 54 is turned, half of the springs 58 are tensioned and tend to rotate their rotor 42 while the oppositely oriented springs 58 are not engaged until lost-motion due to the diameter of holes 64 is taken up, whereupon they give a positive kick to rotor 42 (Figs. 6 and 7, not shown), and the rollers 36 leave the recesses in fixed contacts 32 ; rotor 42 then rapidly rotates until the rollers bridge the next pairs of fixed contacts 32. The motor 12 is de-energized at about the time rollers 36 are leaving the fixed contacts 32 and this is preferably accomplished automatically by connecting the motor 12 in circuit with certain of the contacts 32. Reverse operation of the switch is obtained by energizing the motor in the opposite sense. The arms 98 of actuator 54 extend through levers 94 into notches 104 in a member 102 rotatable in a cover 74 which closes housing 22, and a screwdriver slot 108 in the hub of member 102 enables the switch to be operated manually. Specifications 837,432 837,433, 837,434, 837,435 and 871,568 are referred to.
Patent GB-1175013-A (GB)
Title: Benzimidazole Compounds, process for their Manufacture and their use
IPC: C07D235/18
Filed: 1968-05-27
Abstract: 1,175,013. Microbicidal benzimidazole compositions. CIBA Ltd. 27 May, 1968 [8 June, 1967], No. 25254/68. Headings A5B and A5E. [Also in Divisions C2 and C5] Antibacterial and antifungal compositions comprise, as active ingredient, a benzimidazole derivative of the general formula wherein X is a chlorine atom or a methyl group, together with a carrier, diluent or surface active agent. The compositions may further contain water, an organic solvent, a light filter, an optical brightener and a further bactericide or fungicide. They may be used as cosmetic, preparations or may be applied to fibres and textile materials by impregnation or by spraying with solutions or suspensions containing the benzimidazole derivative.
Patent GB-606904-A (GB)
Title: Improvements in and relating to electric pulse generators
IPC: H03K3/55
Filed: 1945-09-28
Abstract: 606,904. Pulse generating circuits. RATSEY, O. L., and BUCKINGHAM, J. Sept. 28, 1945, No. 25266. [Class 40 (vi)] A pulse generator comprises a transmission line or delay network with means for statically changing the line and a switching device for discharging the line into an output load. Fig. 5 shows a rectangular pulse generator comprising a delay network connected to a load resistance R through a grid-controlled gas discharge tube B, the resistance R having a value equal to the surge impedance of the line. The tube B is provided with a source F of subsidiary triggering pulses to control the instant of discharge. When tube B conducts, a positive pulse equal to V/2 where V is the voltage to which the line is charged, is applied to the load R for a period until the pulse reflected from the open end of the line reaches the load. The line is recharged through half-wave rectifier E during the quiescent period. Alternatively, a D.C. supply may be provided in place of the A.C. supply and rectifier arrangement, a suitable A.C. impedance then being included to prevent a short circuit at the end of the pulse, or a switching means may be employed to disconnect the D.C. charging supply during each discharge period. The value of resistance R may be made greater or less than the value of the surge impedance of the line to provide stepped waveforms. Reference has been directed by the Controller to Specifications 578,510, 579,679 and 582,850.
Patent GB-687180-A (GB)
Title: Improvements relating to anchor nuts
Inventor: BROSCOMB DENNIS GEORGE
IPC: F16B37/06
Filed: 1950-10-19
Abstract: 687,180. Making nuts. G.K.N. GROUP SERVICES, Ltd. Oct. 16, 1951 [Oct. 19, 1950], No. 25434/50. Class 83 (ii). [Also in Group XXV] Anchor nuts of the kind having a base flange or ears for securing to a support have the flange &c. blanked and punched at 14, Fig. 4, from plate stock with embossed welding projections 16 for securing the nut by resistance welding. When the nut is countersunk at 17, Fig. 6, for a lead-in for the bolt, the projections are embossed in a stamped conical flange. In another form, the hole 14 in the plate is countersunk after welding to provide a lead-in.
Patent GB-405381-A (GB)
Title: Casein products and process for their manufacture
Filed: 1932-09-13
Abstract: A casein preparation is produced by adding to an ammoniacal solution of casein an ammoniacal solution of a compound of copper, nickel, cobalt, cadmium, tin, antimony, zinc, chromium or magnesium.  No precipitate is produced, but an insoluble product remains when the water and ammonia are evaporated.  In an example, casein is swelled with water and kneaded with an ammonia solution at 60 DEG  C. until dissolved; the metal compound dissolved in ammonia is then added.  A suitable solution may be prepared by precipitating a nickel sulphate solution with caustic soda and dissolving the washed precipitate in ammonia.  The products are for use in the paint industry, for varnishes, agglomerates, waterproofing and adhesives.  The Specification as open to inspection under Sect. 91 includes the use of ammoniacal solutions of compounds of barium and strontium.  This subject-matter does not appear in the Specification as accepted.ALSO:A casein preparation is produced by adding to an ammoniacal solution of casein an ammoniacal solution of a compound of copper, nickel, cobalt, cadmium, tin, antimony, zinc, chromium, or magnesium.  No precipitate is produced, but an insoluble product remains when the water and ammonia are evaporated.  In an example, casein is swelled with water and kneaded with an ammonia solution at 60 DEG  C. until dissolved, the metal compound dissolved in ammonia is then added.  A suitable solution may be prepared by precipitating a nickel sulphate solution with caustic soda and dissolving the washed precipitate in ammonia.  The products are for use in the paint industry, for varnishes, agglomerates, water-proofing, and adhesives. The Specification as open to inspection under Sect. 91 includes the use of ammoniacal solutions of compounds of barium and strontium. This subject-matter does not appear in the Specification as accepted.ALSO:A casein preparation is produced by adding to an ammoniacal solution of casein an ammoniacal solution of a compound of copper, nickel, cobalt, cadmium, tin, antimony, zinc, chromium or magnesium.  No precipitate is produced, but an insoluble product remains when the water and ammonia are evaporated.  In an example, casein is swelled with water and kneaded with an ammonia solution at 60 DEG  C. until dissolved; the metal compound dissolved in ammonia is then added.  A suitable solution may be prepared by precipitating a nickel sulphate solution with caustic soda and dissolving the washed precipitate in ammonia.  The products are for use in the paint industry, for varnishes, agglomerates, waterproofing and adhesives. The Specification as open to inspection under Sect. 91 includes the use of ammoniacal solutions of compounds of barium and strontium. This subject-matter does not appear in the Specification as accepted.
Patent GB-752301-A (GB)
Title: Floor truck drive pin
IPC: B61B9/00
Filed: 1954-09-03
Abstract: 752,301. Rope railways. WEBB & CO., J. B. Sept. 3, 1954 [Sept. 11, 1953], No. 25572/54. Class 104 (2). A drive pin construction for a load-carrying trolley which is driven by a drive pin engaging a driving chain 16 or the like arranged below floor level has a drive pin 30 mounted beneath the trolley bed between the sides and ends thereof vertically movable, in a sleeve 28 fixed to the trolley, between raised and lowered positions by a handle 50 or pedal arranged alongside the trolley outside of the travel path. The drive pin assembly comprises a framework consisting of a pair of longitudinal members 25 connected by an cross member 26 of angle section and through downwardly and inwardly extending struts 27 to a sleeve 28 in which the drive pin 30 is vertically and rotatably mounted.. The drive pin framework is secured to the trolley by rivets on the like passing through the longitudinal members 25 and truck longitudinal members 23. A lever 32 pivotally mounted at 33 on a pair of straps 34 attached to the cross members 26 carries a yoke 31 which loosely straddles the drive pin 30 between a pair of spaced washers 35 attached to the drive pin 30. The yoke 31 is adjustably mounted in the end of the lever 32 by a pin 38 and a bolt 39 which engages a slot 40. Handles 50 arranged on each side of the trolley are attached to a cross shaft 45 mounted on bearing blocks 46 attached to the members 25 and bearing blocks 47 attached to the trolley frame 22. The shaft 45 has crank arms 44 with a roller 42 to operate the lever 32 and is counterbalanced by a weight 57. In the full line position shown in Fig. 3 the drive pin 30 is held in the disengaged position notwithstanding the weight of the lever 32 since the counterweight presses the roller 42 (which is in a beyond dead centre position of the crank arms) against an abutment 52 mounted on the lever 32. On movement of the handle to the chain dotted position the roller 42 passes away from the dead centre position and the lever drops to allow the drive pin 30 to engage the driving chain pusher dog 17.
Patent GB-750771-A (GB)
Title: Improvements in and relating to objective lenses
IPC: G02B13/02
Filed: 1954-09-03
Abstract: 750,771. Optical objectives. VOIGTLANDER AKT.-GES. Sept. 3, 1954 [Sept 18, 1953], No. 25639/54. Class 97 (1). A telephoto anastigmat consists of a front positive combination separated by a distance greater than F/3 from a rear negative combination, each combination consisting of a biconvex positive component followed by a negative component having surfaces of unequal curvature the more strongly curved of which is concave over the longer conjugate side, the radius of curvature of the front surface of the rear negative component. being greater than 18 per cent F. and less than 36 per cent F. and the axial distance between that surface and the rear surface of the front combination being greater than 40 per cent F., where F is the focal length of the objective. Numerical data are given for one example of the objective shown. Specification 709,659 is referred to.
Patent GB-151173-A (GB)
Title: Improvements in stamping, crushing or like machines
IPC: B02C1/14
Filed: 1919-10-20
Abstract: 151,173. Adams, H. F. Oct. 20, 1919. Stationary-mould machines.-In moulding-apparatus comprising a plunger which is depressed manually and raised by springs, the plunger is guided and prevented from rotating by means of guide-rails. A machine for making butter-pats is shown in Fig. 2, the plunger c<1>, guided by rails b<1> and connected to a returning-spring e', being formed with punches d<1> adapted to enter holes in a plate g<1>. A slab g<2> of butter is placed on the plate, and the pats drop into a receptacle g<3>.
Patent GB-859925-A (GB)
Title: Improvements relating to alternating current generators and to synchronous control systems embodying such generators
Inventor: MURDOCH PETER
IPC: H02K57/00
Filed: 1958-08-11
Abstract: 859,925. Selsyn machines. ELLIOTT BROS. (LONDON) Ltd. Oct. 20, 1959 [Aug. 11, 1958], No. 25716/58. Classes 35 and 38 (2). In a polyphase selsyn transmitter, each phase produces a steady current of magnitude and direction depending on the angular position of the rotor. This is achieved by the use of quadrature stator generating windings d, d and e, e in each phase, these windings together feeding each phase winding on the synchronous follower through rectifiers f. The rotor carries a single-phase excitation winding a, a. The pole-arc of the rotor poles and the coil span of the stator windings are each about “ pole-pitch so that the stator windings only generate while the rotor is within 45 degrees of the centre of the winding. The rectifiers f are reversely connected to each other so that the windings d, d and e, e supply alternate (positive and negative) half-waves to the motor windings g, g as the rotor rotates. The motor may have a single winding for each phase, but preferably separate windings g, g fed from the quadrature generator windings are used as shown. Halfwave rectification and smoothing networks may be used.
Patent GB-1286208-A (GB)
Title: Method of producing threonine by fermentation
IPC: C12P13/08
Filed: 1970-08-28
Abstract: 1286208 L-threonine by fermentation AJINOMOTO CO Inc 28 May 1970 [28 May 1969] 25751/70 Heading C2C L-threonine is prepared by culturing an L- threonine producing microorganism of the genus Brevibacterium, Corynebacterium, Arthrobacter or Microbacterium and which is resistant to α- amino-# -hydroxyvaleric acid, at a temperature of from 25‹ to 37‹ C. on a nutrient medium containing an assimilable source of nitrogen and ethanol in a concentration of less than 5 g./dl. as the principal source of assimilable carbon and recovering the accumulated L-threonine from the medium. The ethanol may be fed to the nutrient medium either intermittently or continuously during the culturing in order to at least partly replenish the consumed carbon source. The pH of the medium is preferably between 6 and 9.
Patent GB-1527839-A (GB)
Title: Two-wire signal transmission
IPC: H03F3/183
Filed: 1977-06-21
Abstract: 1527839 Two-wire circuits WESTERN ELECTRIC CO Inc 21 June 1977 [28 June 1976] 25805/77 Heading H4R A bidirectional 2-wire signal circuit includes a directional threshold detector 2 providing a control signal, in response to the direction of signal flow, to (at least one) power converter 1 which is a 2-part circuit providing in one direction a predetermined gain and in the opposite direction an equal loss. The circuit shown operates to detect the longitudinal voltage difference across resistor R s  and provide greater gain for receive than transmit signals, thereby preventing singing and assisting an audially-deficient subscriber. Power converters may be arranged to effect directional-switching and assist quiet-speaking subscribers. The converter operation is effected by light-dependent resistors in op-amp circuits.