baber/WOPTO huggingface dataset:
Patent GB-546703-A (GB)
Title: Improvements in or relating to volume range control systems
IPC: H03G7/02
Filed: 1941-03-13
Abstract: 546.703. Automatic volume control. RADIO CORPORATION OF AMERICA. March 13, 1941, No. 3434. Convention date, March 30, 1940. [Class 40 (v)] A signal amplifier with means for deriving rectified signals for controlling the gain of the amplifier is characterized by a control amplifier for amplifying the rectified signals and by means for causing the gain of the signal amplifier and the control amplifier to vary inversely. With respect to one another in response to variations in the amplitude of the rectified signals for preventing gain variation of the signal amplifier from influencing the controlling function of the controlling amplifier. As shown in Fig. 1 an audio-frequency voltage is taken from a variable potentiometer resistance 9 and fed through switch 17 to the control grid of an amplifier 48 which feeds an amplifier 50 whose output is coupled to a diode 12 having a load resistor 54, 55 earthed at the centre 56. The positive terminal 58 of resistor 54 is connected through a filter 59 to the control grid of an intermediate frequency amplifier 8. This provides volume expansion dependent on the depth of modulation since the carrier intensity is kept constant by the usual A.V.C. arrangement 6. To prevent instability due to a regenerative effect, the negative terminal 60 of resistor 55 is connected to the control grid of amplifier 48 to reduce the gain with increased depth of modulation. A suitably biased diode 14 serves to prevent the negative bias on grid of valve 8 from being reduced beyond a predetermined value, thus setting a limit to the maximum gain. Rotation of switch 17 serves to disconnect the volume expansion circuit and to bias valve 8 to an intermediate value of gain. Also the cathode-ray indicator 35 is connected to the A.V.C. circuit 6 in the usual way. Volume contraction may be effected by connecting valve 8 to the negative terminal of resistor 55 and control amplifier 48 to the positive terminal of resistor 54.
Patent GB-365814-A (GB)
Title: Apparatus for producing groups of cigarettes in overlapping scale-like formation
IPC: B65B19/08
Filed: 1931-02-03
Abstract: 365,814. Arranging cigarettes for packeting. UNIVERSELLE CIGARETTEN-MASCHINEN-FABRIK J. C. MœLLER & CO., 48, Zwickauerstrasse, Dresden, Germany. Feb. 3, 1931, No. 3442. Convention date, Feb. 4, 1930. [Class 94 (i).] In arranging cigarettes of oval cross-section into groups in which the cigarettes overlap each other, the cigarettes are conveyed to position x by a chain 1 and are moved therefrom into a curved slideway 4 by a rotating brush 3. The first cigarette of a group is arrested by a stop 5, and the succeeding ones engage partly underneath each preceding cigarette to form an overlapping assembly. Normally, the following cigarettes ensure that each cigarette is forwarded from the position x by the brush 3, but in order to ensure the introduction of the last one in each group to the slideway, cam-actuated fingers 8 mounted on the chain drum 7, rise and engage behind the cigarette. Before the last cigarette has time to fall out of its inclined position, a resilient arm 12 on a rotating cross sweeps the group forward, the stop 5 being drawn downwards to allow its passage. The group arrives at position y, a stop 20 rising to maintain it in position until a plunger removes it to the packeting position. A stop 29 disengages the arm 12 from the group. The ends of the arm are hinged at 30 and are arranged to yield under the action of springs 31.
Patent GB-601577-A (GB)
Title: Improvements relating to control valve arrangements for pneumatically-operated tools
IPC: E21B21/01
Filed: 1946-02-04
Abstract: 601,577. Pneumatic tools. CLIMAX ROCK DRILL & ENGINEERING WORKS, Ltd., ST. STEPHENS, R. DE H. and McLEMAN, G. A. Feb. 4, 1946, No. 3512. [Class 124] [Also in Group XXIX] In a pneumatic tool in which the air supply is automatically cut off by a spring-controlled valve when the water supply fails or its pressure falls to a predetermined minimum, the automatic air valve being incorporated either in the back-head of the tool, as described in Speci. fication 550,937, or in a separate valve block, as described in Specification 552,269, the pressure water acts on a composite flexible diaphragm formed of rubber 7 bonded to metal 9, the diaphragm flexing under normal pressure to open the automatic air valve 11. The diaphragm is also bonded around the small end 12 of a metal stem 10 which passes through a guide 16 and abuts a cylindrical slide 17 integral with the valve 11. The diaphragm is held in position by a spring 14 engaged by a removable screwed plug 15.
Patent GB-1027310-A (GB)
Title: An automatic narrowing mechanism in a flat knitting machine
IPC: D04B11/06
Filed: 1963-01-29
Abstract: Narrowing and widening mechanism for a flat bed machine comprises a series of transfer points 13 adapted to be lowered into engagement with the needles which are then operated in conjunction with the points to transfer the loops to or receive the loops from the points for the purpose of narrowing or widening the fabric being knitted. To this end the points 13 are mounted on a slide 12, Figs. 4 and 9 (not shown) which raises or lowers them into contact with the needles.  The slide 12 is attached to a rack 11 driven by rack and pinion mechanism 22 ... 26 operated by a cam on the cam shaft to advance and retract the points.  The slide 12 is also supported in a block 10 which is advanced by pawl and ratchet mechanism 7, 8 to pivot the points and mechanism into a position whereby the narrowing or widening can be effected.  Two cam shafts are provided in the machine one of which is effective under pattern control to effect narrowing and the other of which effects widening.  Lead screws 6 are provided for traversing the blocks 10 under cam control to effect the shogging movement of the points for lateral transfer of the loops and lead screws 32 are provided for shogging the needle selecting mechanism 34 ... 36 which functions to select the needles for the loop transferring operations in either a widening or narrowing direction.
Patent GB-607458-A (GB)
Title: Fire extinguishing system and method
IPC: A62C99/00
Filed: 1946-02-05
Abstract: 607,458. Fire extinguishers. TRIGGS, W. W. (Specialties Development Corporation). Feb. 5, 1946, No. 3591. [Class 47 (ii)] [Also in Group XXVIII] Liquid carbon dioxide stored at sub-atmospheric temperatures is ejected from its container as snow by the pressure of a mixture of nitrogen, air or other substantially inert gas and carbon dioxide. The liquid carbon dioxide is stored in a container 10 and cooling coils 11 from a refrigerator 12 keep the liquid and vapour at a constant low temperature by means of a thermostat 13. An outlet conduit 14 from the bottom of the container 10 leads to the discharge system. The nitrogen &c. is introduced into the vapour space V of the container 10 from a cylinder 25, either manually or by an automatic pressure-operable valve.
Patent GB-691100-A (GB)
Title: Improvements in convertible bed settees
Inventor: VAUGHAN VIVIAN JOHN
IPC: A47C17/207
Filed: 1952-02-11
Abstract: 691,100. Bed-settees. MULTI-SPRING, Ltd. Feb. 11, 1952, No. 3612/52. Class 52(ii) A bed-settee in which the back is hinged to the fixed frame and is supported by a strut is constructed in such a manner that the back A is pivoted at F to the fixed frame by metal brackets E, a block H being arranged on the fixed frame below the pivots F and a base block C has a recess for the reception of the end of the strut B. The height of the pivots F and the length of the adjacent portion of the bracket E is such that when the back is lowered to form the head end of the bed it rests upon the blocks H, C. The seat is formed of two mattresses K, I hinged together so that the mattress K may be extended to form a bed section, legs or feet M being provided on such mattress K.
Patent GB-368769-A (GB)
Title: Improvements in the contact arrangements of electric circuit making and breaking devices
IPC: H01H1/36
Filed: 1930-12-05
Abstract: 368,769. Switch contacts. CALLENDER'S CABLE & CONSTRUCTION CO., Ltd., Hamilton House, Victoria Embankment, London, and WILSON, A. E., 19, Oaklands Road, Bromley, Kent. Dec. 5, 1930, No. 3703/32. Divided on 368,755. [Class 38 (v).] A contact blade is gripped between two members so that contact may be broken by relative sliding of the blade and the two members, and a single bolt passes through the gripping members, and through spring members carrying arcing tips for adjusting the contact pressure. Two bars 5 grip at their ends contact blades 1, and are provided at their ends with spring members 9 having arcing tips 12, bolts 10 which pass through holes at each end of the bars 5, and through holes in extension of the spring members 9 being provided for adjusting the contact pressure. The members 9 are shaped to fit channel recesses in the sides of the bars 5. A bridge 7 having notches 13 for the bolts 10, is situated between the bars 5, and is provided with means for attaching a handle 16. The blades 1 may also have arcing tips.
Patent GB-822450-A (GB)
Title: Melt spinning polypropylene
Inventor: LLOYD-ROBERTS JOHN FRANCIS
IPC: D01F6/04
Filed: 1957-02-04
Abstract: In melt spinning polypropylene filaments containing a major proportion of the polypropylene in isotactic form, the filaments coming from the spinneret are maintained after solidification at an elevated temperature, e.g. 110-120 DEG  C., at which crystallization occurs at a high rate until the filaments are stabilised, so that they do not subsequently elongate when stored at room temperature, e.g. after having been wound up on a yarn package such as a bobbin. In the example, a monofil of isotactic polypropylene is melt-spun at 280 DEG  C. and passed through a metal tube 60 cm. long and of 5 cm. diameter interposed between the spinneret and the wind-up bobbin at such a distance below the spinneret that the filament has time to solidify before entering the tube.  The tube is heated to 110-120 DEG C. by electrical resistance heaters strapped round the outside of the tube.  The process is particularly applicable to filaments having an intrinsic viscosity of 0.8-1.0 dl./gr.  Specification 818,100 is referred to.
Patent GB-224427-A (GB)
Title: An obturator to render bottles unrefillable
IPC: B65D49/02
Filed: 1924-02-14
Abstract: 224,427. Rockey, N. F. W., and Young, S. D. Feb. 14, 1924. Bottles, non-refillable.-An obturator for non- refillable bottles comprises a hollow member d, having a passage b and a valve seat c<1> at its lower end. A valve a, Figs. 1 and 3, recessed at a', rests upon the valve seat and is limited in its upward movement by the lower end e<1> of a hollow member e, cut away at e<2> to allow the passage of liquid. The members d, e are made of sheet metal and are secured together by interengaging flanges g, resting on a washer h and secured in position by a threaded cap i. The threads on the bottle neck are interrupted by grooves j adapted to be engaged by spring pawls k to prevent unscrewing. The parts d, e may be made from the plate and re-tinned before being secured together, and, according to the Provisional Specification, of glass or porcelain.
Patent GB-945018-A (GB)
Title: Process of chemical metal plating and baths therefor
IPC: C23C18/34
Filed: 1962-02-01
Abstract: A chemical plating bath for coating metals or plastics with metal comprises a solution containing a salt of the plating metal, a boron compound with 1-4 hydrogen atoms selected from alkali metal borohydrides, alkylamino boranes, alkylamino borines and borozoles as reducing agents, and at least one soluble organic sulphur compound having a CSC grouping.  The solution may additionally contain one or more compounds of the metals of Group IIb, IIIb, IVb, Vb and VIb of the Periodic System, buffers such as sodium acetate, citrate or tartrate and complex formers such as ethylene diamine, ethanolamine, tetramethylene diamine, diethylene triamine, triethylene tetramine, ethylenediamino tetraacetic acid and nitrilotriacetic acid.  The plating metals specified are Ni, Co, Fe and Zn and the materials coated may be Ni, Cu, brasses, Al, Fe and plastics such as acetyl cellulose, cellulose acetobutyrate, P.V.C., polyamides, polyurethanes, polystyrene, polycarbonates, polyacrylates, polyethylene and polypropylene. In the case of plastics they are first pretreated in a solution of NaOH and a wetting agent followed by a solution of stanuous chloride hydrochloric acid and a wetting agent and then a solution of palladium chloride and hydrochloric acid.  The salts of the plating metals may be the nitrates, formates, chlorides, sulphates or acetates and the organic sulphur compounds may be sulphur containing aliphatic carboxylic acids, alcohols and their derivatives, sulphur containing aromatic/aliphatic carboxylic acids, sulphur containing acetylenic compounds, aromatic sulphides, thiophenes and thionaphthenes, and thiazoles.  Many examples of these sulphur compounds are given.  The preferred coating solution contains 0.1-10 g/1. of the boron compound, 0.02-0.5 mol/1. of the plating metal salt, 0.001-5 g/1. of the organic sulphur compound, 0.001-1 g/1. of compounds of the other metals, 5-200 g/1. buffers and 0.2-5 mol/1. of complex formers.
Patent GB-339192-A (GB)
Title: Improvements relating to liquid fuel, gas or like burners of furnaces
IPC: F23D11/42
Filed: 1930-02-05
Abstract: 339,192. Collins, T. B. Feb. 5, 1930. Pilot jets. - A closure, plate is moved by gravity, a spring or gearing to cover the burner aperture in a furnace when the burner is removed and to shut off the supply of gas to a pilot-jet, Fig. 1, shows liquid fuel or gas burner c such as described in Specification 339,190, [Class 75 (i), Burners &c.], mounted on a hinged head as described in Specifications 339,191, [Class 75 (i), Burners &c.], a closure plate d being moved about its pivot d<1> by a counterweight d<2> to close the furnace aperture a<1> when the burner is swung about the pivot c<1>. The pivot d<1> is formed by a screw pin carrying a bush d<4> which is formed with a passage d<5> registering with the gas conduit b<1>. When the plate is in the open position, the passage d<5> communicates with the pilot jet through a passage in the boss d<7> of the closure plate d.
Patent GB-696367-A (GB)
Title: Improvements relating to musical combs
IPC: G10F1/06
Filed: 1950-02-15
Abstract: A zinc alloy used for casting the base of a comb in a musical box (see Groups XX and XXXVIII) includes 3.5-4.5 per cent aluminium, 2.5-3.5 per cent copper, 0.02-0.1 per cent magnesium, not more than 0.1 per cent iron, 0.007 per cent lead, 0.005 per cent cadmium, 0.005 per cent tin and the remainder zinc.
Patent GB-557135-A (GB)
Title: Improvements in electric condensers
IPC: H01G5/12
Filed: 1942-03-27
Abstract: 557,135. Locking bolts; securing against unauthorised removal. MULLARD RADIO VALVE CO., Ltd., and MAITLAND, C. E. March 27, 1942, No. 4101. [Class 89 (i)] [Also in Group XXXVI] Condenser electrodes varied in relative position by a nut and shaft action, are locked in position by two opposed coiled springs normally gripping the shaft. As shown, the springs 16, 17 have their adjacent ends 18, 19 brought out and anchored in arms 9 attached to the movable part 2 of a concentric cylindrical condenser 1, 2 adjusted by screw-action from casing 10. One or other of the springs 16, 17 is eased, according to the direction of rotation by a projection within the casing 10 bearing on one or other of the outer spring-ends 21, 22, which also are brought out normally to lie on each side of the projection. Over-actuation of the screwed spindle 14 in an outward direction is prevented by a screwed stop 11 locked in position by running in wax or low-melting alloy 12. A pressedin cap 13 serves as outer protection.
Patent GB-637051-A (GB)
Title: Temperature control system
IPC: G05D23/13
Filed: 1948-02-12
Abstract: 637,051. Induction motors; automatic temperature control systems. FLIGHT, T. N., and WILSON, W. H. Feb. 12, 1948, Nos. 4164 and 18427. [Classes 35 and 38 (iv)] [Also in Group XXXVII] In a heating system wherein a thermally sensitive switch 15, Fig. 1, determines the direction of rotation of a reversible electric motor 9 operating a valve 10 to maintain the temperature constant, the motor is energized intermittently for varying periods depending upon the departure of the controlled temperature from a predetermined value. The valve 10 may control the amount of hot and returning water in pipes 3 and 4 respectively in a hot water radiator system or it may control the passage of steam from a boiler to a heatexchanger (Fig. 2, not shown). The reversible motor may be a shaded pole induction motor 23, Fig. 3, having four main poles each having an energizing winding 28-31. Each pole is split into two legs, each leg being wound with a shading coil. Shading coils 41, 43, 45, 47 are connected in series and coils 40, 42, 44, 46 are also connected in series, the two circuits being made common at 48, and connected to the thermostat switch 50 and a motor switch 49. The opposite ends of the shading coil circuits are connected to contacts 53, 54 of the thermostat switch and contacts 51, 52 of the motor switch. The main windings of the motor are energized intermittently by means of contacts 56, 57 co-operating with a rotating segment 58, the contact 57 being adjustable to vary the lengths of period of operation. At the predetermined value of temperature both sets of shading coils are short-circuited and upon energization the motor remains stationary. Upon a departure of the temperature from the predetermined value the thermostatic switch open circuits one set of shading coils so that upon energization the motor will rotate to operate the valve in a sense to correct the deviation. If, however, a large deviation occurs, further contacts 59, 60, 62 of the thermostat switch operate to close a secondary motor energizing circuit, the motor remaining energized as long as the segment 58 is in contact with 56 independent of the position of the contact 57, so that the valve may be positioned more quickly. The motor switch 49 is geared to the motor so that upon complete closure or full opening of the valve both shaded windings become short-circuited, thereby stopping the motor. In a modification (Fig. 4, not shown), both sets of shading windings are permanently short-circuited, the motor having two separately wound stators, the direction of rotation being determined according to which stator is energized by means of the thermostat switch.
Patent GB-372775-A (GB)
Title: Improvements in or relating to the production of compositions of or containing rubber
IPC: C08L7/00
Filed: 1931-02-11
Abstract: Aqueous emulsions of rubber, guttapercha, balata, or other vegetable resins, or of synthetic rubber, applicable as adhesives for fibrous material, especially leather to rubber, are prepared by adding to natural or artificial aqueous dispersions of one or more of these substances (including dispersions of vulcanized, waste or reclaim rubber), aqueous dispersions of rubber solvents such as coal-tar naphtha or carbon tetrachloride in the presence of destabilizing agents such as ethyl alcohol, acetone or zinc oxide.  The initial rubber or like dispersion may contain compounding or vulcanizing ingredients or may comprise concentrates prepared as in Specifications 219,635 and 290,313, [both in Class 70, Indiarubber &c.].  In examples: (1) 50 parts of a 50 per cent rubber latex are mixed with 40 parts of an aqueous dispersion, containing 50 per cent of coal-tar naphtha and prepared with oleic acid gelatine and soap, together with 10 parts of methylated spirits; (2) 100 parts of 60 per cent rubber latex are mixed with 40 parts of 25 per cen sodium silicate solution and 5 parts of 10 per cent casein-ammonia solution, and 100 parts of a 50 per cent dispersion of carbon tetrachloride and 20 parts of methylated spirits are added.  The carbon tetrachloride dispersion is prepared with the emulsifying agents referred to in (1).ALSO:Aqueous emulsions of rubber, guttapercha, balata or other vegetable resins, or of synthetic rubber, applicable as adhesives for fibrous material, especially leather to rubber, are prepared by adding to natural or artificial aqueous dispersions of one or more of these substances (including dispersions of vulcanized, waste or reclaim rubber), aqueous dispersions of rubber solvents such as coal-tar naphtha or carbon tetrachloride in the presence of destabilizing agents such as ethyl alcohol, acetone or zinc oxide. The initial rubber or like dispersion may contain compounding or vulcanizing ingredients or may comprise concentrates prepared as in Specifications 219,635 and 290,313, [both in Class 70, Indiarubber &c.].  In examples (1) 50 parts of a 50 per cent rubber latex are mixed with 40 parts of an aqueous dispersion, containing 50 per cent of coal-tar naphtha and prepared with oleic acid, gelatine and soap, together with 10 parts of methylated spirit; (2) 100 parts of 60 per cent rubber latex mixed with 40 parts of 25 per cent sodium silicate solution and 5 parts of 10 per cent casein ammonia solution, and 100 parts of a 50 per cent dispersion of carbon tetrachloride and 20 parts of methylated spirit are added.  The carbon tetrachloride dispersion is prepared with the emulsifying agents referred to in (1).
Patent GB-632511-A (GB)
Title: Improvements relating to dials for radio receivers and the like
IPC: H05K11/00
Filed: 1947-02-14
Abstract: 632,511. Indicating-apparatus. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Feb. 14, 1947, No. 4249. Convention date, Feb. 14, 1946. [Class 106 (iv)] [Also in Group XL (c)] An article having a dial, particularly a radio receiver, comprises a panel having an opaquepatterned portion surrounding a tuning dial which is covered by a translucent-patterned covering which normally conceals the dial and appears as a continuation of the opaquepattered portion except when the dial is illuminated. A radio receiver is concealed in a wooden or imitation wooden table top 2 having a front side 4 made of a transparent material covered on its inside or outside surface with a translucent veneer or decoration which may be a photographic replica or of paper transfer and which harmonises with the table top. All but a portion of the front is rendered opaque by a backing, for example of paint, and this portion conceals a dial or scale 4b which may be impressed on the rear surface or may be separate and which becomes visible when illuminated. The control knobs take the form of handles 5, 6 for an imitation drawer 4a. In an alternative arrangement (Fig. 4, not shown), the receiver is housed in the vase-like body of a table lamp and the translucent covering has the appearance of marble or other decorative stone-ware. The Specification as open to inspection under Sect. 91 suggests that the invention is applicable to other articles having a dial besides radio receivers. This subject-matter does not appear in the Specification as accepted.