baber/WOPTO huggingface dataset:
Patent GB-151242-A (GB)
Title: Improvements relating to the sound boxes of talking machines
IPC: G11B3/46
Filed: 1920-06-17
Abstract: 151,242. Hurm, H. Sept. 15, 1919, [Convention date]. Diaphragms and diaphragm mountings; soundbox cases; tool arms and mountings.-In a soundbox in which the vibrations from a fibre needle h are communicated to the diaphragm b through a light lever a not fixed to the diaphragm but pressed against it by a spring c, means are provided for adjusting the point of application or contact of the end of the lever on the diaphragm. The lever is adjustably pivoted upon the points of two screws e, which fit into conical holes in an axle f of insulating-material. A buffer d of rubber or like material may be inserted as shown. The spring c, preferably helical, is insulated from the lever a by a twist of silk or elastic material g. The pressure of the gaskets on the diaphragm b can be regulated by the base j screwing into the body of the box. An alternative means for obtaining the maximum tone production is to vary the capacity of the sound-chamber by inserting between the diaphragm and the member j a circular ring of spongy rubber and a similar ring of metal, metal rings of different thickness being employed. A modified arrangement has the diaphragm resting against a suitable carrier, or carried in a conical recess.
Patent GB-944881-A (GB)
Title: Improvements in and relating to electrically heated boilers in hot-water heating systems for buildings
IPC: F24H9/06
Filed: 1960-05-10
Abstract: 944,881. Hot-water boilers. C. PEERS. May 10, 1961 [May 10, 1960], No. 16409/60. Drawings to Specification. Heading F4A. An electrically-heated water heater in a circulation system for heating a building, is adapted to be suspended between the floor joists of the building. In the form described, the boiler is heated by thermostaticallycontrolled immersion heaters and is attached to the floor joists by brackets welded to the boiler casing.
Patent GB-453965-A (GB)
Title: Improvements in means for producing designs upon very heavy rollers for colour printing purposes
IPC: B41D7/04
Filed: 1935-06-06
Abstract: 453,965. Engraving. MOULTON, Ltd., G., VARLEY, G. P., and CLARKE, A., Whitley Street, Manchester. June 6, 1935, No. 16420. [Class 100 (ii)] In a machine for engraving designs on the waxed, varnished, or otherwise treated surface of heavy printing-rollers, the whole of the movement of the tracing device over the pattern is transmitted through a compound slide structure to the engraving tool or tools and the roller is rotated and adjusted as required by hand. For producing reduced engravings of the pattern which is mounted on a table a, the tracer is carried by one arm b 1 of a pantograph frame, another arm of which is pivoted to a bracket d<1> adjustably secured to a bar e, adapted to roll longitudinally of the roller r to be engraved, upon a rail e<7> fixed to bars e<8> mounted to roll on the transverse bars g of the machine frame. Pendant brackets h<2> fixed to the bar e carry a bar h to which supports i<1> for the levers i carrying the engraving tools are adjustably secured. A second rolling bar e which may carry another engraving lever or set of levers is connected to the first bar e for movement in the same or the opposite direction. The engraving tools are moved into and out of contact with the roller r as required by means of a bar l engaging arms j<4> on shafts j<1> carrying cams engaging adjustable stops i<5> on the levers i. Weighted arms on the shafts j<1> hold the arms j<4> on constant contact with the bar l. The bar l is carried at one end by an arm l<2> and at the other end by a bell-crank lever l<3> connected by a rod l<5> to a treadle l<9>. Upon depressing the treadle against the action of a weight l<8> thereon the bar l is raised and the cams j are turned to allow the levers i to fall into the operative position. The roller r is supported by rollers n<1> on a slide n adjustable by screw-and-worm mechanism n<2>, n<3>, n<4> on a bed-plate m<5> carried by a screw m<1> adjustable vertically by a worm-wheel nut m<2> and worm m<3>. The roller is angularly adjustable by a worm engaging a worm-wheel on the roller shaft r<1> and an indexing wheel is fixed to the shaft r<1> to facilitate the adjustment. If a full-size reproduction of the pattern is desired, the pantograph frame is replaced by a tracing arm rigidly fixed to one of the bars e.
Patent GB-547481-A (GB)
Title: Improvements in or relating to electrical resistors
IPC: H01B1/24
Filed: 1940-07-15
Abstract: 547,481. Non-metal resistors. UNITED AIR LINES TRANSPORT CORPORATION. July 15, 1940, No. 16520/41. Convention date, May 10, 1940. Divided out of 545,007. [Class 37] A flexible waterproof resistor comprises a fibrous rope body of jute, hemp, or the like, having interstices carrying granular resistance material within them and surrounded by a flexible waterproof covering of rubber &c. A body 11 of fibrous rope-like material such as jute or hemp is impregnated with colloidal graphite derived from an aqueous graphite dispersion and is then dried, leaving the graphite deposited throughout the fibres in minute particles. A rubber or other watertight insulating covering 12 is then applied by extrusion, moulding, or otherwise. Terminals 13 are provided.
Patent GB-626412-A (GB)
Title: Improvements in or relating to electro-magnetic ignition devices intended for use with electric discharge tubes filled with gas and/or vapour
IPC: H05B41/06
Filed: 1947-06-24
Abstract: 626,412. Control systems for space discharge lamps. PHILIPS LAMPS, Ltd. June 24, 1947, No. 16623. Convention date, June 27, 1946. [Class 38 (iv)] [Also in Group XXXVII] An electromagnetic starter connected across a discharge lamp 1 and comprising a coil 11 shunted by normally open contacts 13, 14 which repeatedly close and re-open until the lamp starts, has included in the contact circuit a thermal interrupter comprising a bimetallic member 17 heated by a resistance or glow discharge tube 20 included in the coil circuit, or by the heat generated in the coil 11 (see Group XXXVII) so as to open contacts 18, 19 after a predetermined period, in the event of a lamp failure, and so prevent repeated operation of the starter. The interrupter and starter are inoperative at the reduced voltage existing across the lamp when running. The light emitted by the resistance or, glow discharge tube 20 may be made perceptible to indicate that the interrupter has operated. The moving contact 13 may co-operate with contact 18 and so dispense with contacts 14, 19.
Patent GB-150262-A (GB)
Title: Improvements in ventilators
IPC: F24F7/02
Filed: 1920-06-19
Abstract: 150,262. Horsburgh, J. K. June 19, 1920. Ventilating-shaft terminals and like ventilators. -A roof ventilator comprises a V-shaped frame 1 carrying louvers 4 and a ridge-shaped top 5 and, mounted on the frame, a V-shaped cover 6 open at the top and spaced from the roof at the bottom 7. Air currents entering at 7 flow upwardly to the outlet 8 and foul air issues between the louvers 4.
Patent GB-799153-A (GB)
Title: Process for the manufacture of n-oxalkylated polycondensatio
IPC: C08G69/48
Filed: 1956-05-29
Abstract: N-oxalkylated polyamides are made by reacting polyamides suspended in organic liquids with which they do not react, with alkylene oxides at elevated temperature, in the presence of catalysts.  Specified alkylene oxides are ethylene oxide, propylene oxide, epichlorhydrin and 2-ethyl-2-methyl-oxacyclobutane.  Organic liquids specified are aromatic, chlorinated aromatic, partially hydrogenated aromatic and aliphatic or cyclo-aliphatic hydrocarbons and ethers, e.g. toluene, xylene, chlorinated benzene, chlorinated naphthalene, tetrahydronaphthalene, benzine, cyclo-hexane and methylcyclo-hexane, decahydronaphthalene and dioxane.  Catalysts specified are alkali metals, alkali metal oxides, hydroxides and alcoholates, organic bases and Friedel-Crafts catalysts, e.g. dimethylaniline, pyridine, boron fluoride, aluminium chloride and zinc chloride.  In Examples: (1) to (3) and (5) powdered polyamincaproic acid is suspended in (1) decahydronaphthalene and reacted with ethylene oxide in the presence of sodium hydroxide; (2) tetrahydronaphthalene and reacted with ethylene oxide in the presence of potassium hydroxide; (3) tetrahydronaphthalene and reacted with epichlorhydrin in the presence of boron fluoride etherate; (5) tetrahydronaphthalene and reacted with ethylene oxide in the presence of sodium hydroxide; whilst in Example (4) a powdered co-polyamide derived from hexamethylene ammonium adipate and aminocaproic acid is suspended in tetrahydronaphthalene and reacted with ethylene oxide in the presence of sodium.
Patent GB-888415-A (GB)
Title: Production of an intermediate for the synthesis of reserpine
Filed: 1958-05-23
Abstract: Laevo - rotatory lactone of 6a  - bromo - 8b  - hydroxy - 2a  - methoxy - 3b ,5b  - epoxy - 7 - oxo - 4aa , - 8aa  - decahydronaphthalene - 1b  - carb - oxylic acid or its optical antipode or racemate is prepared according to the equation <FORM:0888415/IV (b)/1> <FORM:0888415/IV (b)/2> by oxidising the corresponding 7b -hydroxy compound with a solution of chromic acid and phosphoric acid in aqueous acetic acid, working at ambient temperature and in the presence of a solvent which is immiscible with water, e.g. dichloroethane, tetrachloroethane, or methylene chloride, and subsequently separating the desired product, e.g. by extraction with methylene chloride.  A detailed example is given. Specifications 868,475, 868,477, 868,478, 868,484 868,485, 888,407, 888,408, 888,409, 888,410, 888,411, 888,412, 888,413, 888,414 and 888,416 are referred to.
Patent GB-545425-A (GB)
Title: Improvements in electric transformers
IPC: H01F30/14
Filed: 1940-11-22
Abstract: 545,425. Phase changing transformers. BRITISH THOMSON-HOUSTON CO., Ltd., and GARRETT, W. B. Nov. 22, 1940, No. 16768. [Class 38 (ii)] In a transformer for transmitting power between two and three-phase circuits and comprising a three-limbed core carrying a normal deltaconnected winding B and windings a, b, c, d, e arranged for connection, as shown in Fig. 1, to a two-phase circuit, additional turns f, g, hare provided on the core legs so that by connecting the windings as shown in Fig. 2 the transformer may be used for interconnecting two three-phase circuits.
Patent GB-1423252-A (GB)
Title: Electrolytic cell for alkali metal chlorates
IPC: C25B9/17
Filed: 1973-05-07
Abstract: 1423252 Electrolytic cell PENNWALT CORP 7 May 1973 [18 July 1972] 16880/75 Divided out of 1423251 Heading C7B The subject-matter of this Specification is contained in Specification 1423251 but the claims are concerned with an electrolytic cell comprising an electrically conductive tank; solid cathode means in the tank and electrically coupled thereto; an electrically conductive headboard constituting a lid for the tank; means for electrically insulating the headboard from the tank; anode means suspended from the headboard in adjacently spaced disposition with the cathode means; means for pumping an electrolyte through the tank so that the cell is flooded; an anode bus of plate material; and a cathode bus of strip material, the anode and cathode buses being in face-to-face contact respectively with the exterior of the headboard and the exterior of the tank so that, in use of the cell, they can be cooled by the electrolyte being pumped through the cell.
Patent GB-311957-A (GB)
Title: Improved package or carton for cigarettes
IPC: B65D75/38
Filed: 1928-06-11
Abstract: 311,957. Grupe, W. F. June 11, 1928. Packeting cigarettes.- A carton or packet for cigarettes comprises an outer pouch-like case 10 open at one end an inner drawer 15 slidable therein and containing the cigarettes which are wrapped in air and moisture proof material 17 such as tin-foil, waxed paper, &c. ; the drawer comprises a back portion 15<b>, side walls 15<c >and end walls 15<a> having flaps 15<a1>. The end wall and flap of the drawer at the open end of the case 10 forms a closure for the package and may be sealed to the case 10 by a stamp &c. stuck over the drawer and open end of the case 10 on to the sides thereof. A thumb opening 12 in the case 10 facilitates gripping the drawer. The drawer may also be wrapped in tin foil &c. before enclosure in the outer case which may be of transparent material such as grease-proof paper, waxed paper &c. preferably coated on the inner face only, so that the case is moisture proof and the coating is located so as not to rub off; the cigarettes may be wrapped in similar transparent material. The side walls of the slide may be scored along lines 15e so as to fold over the enclosed cigarettes as the number is decreased.
Patent GB-480572-A (GB)
Title: Improvements in or relating to direction finding radio receivers
IPC: G01S1/02
Filed: 1937-06-17
Abstract: 480,572. Directive wireless signalling. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. June 17, 1937, No. 16895. Convention date, June 20, 1936. [Class 40 (v)] To secure visual or audible indications, free from " night-effect," in a switch-controlled direction-finding aerial used in conjunction with " impulse " signals, the direct groundray is used to vary the gain of a high-frequency amplifier to such an extent that it becomes insensitive to the impulse " echo " reflected down from the Heaviside layer. As shown in Fig. 2, a vertical aerial A is constantly switched at U, to aid or oppose the voltage pick-up from a frame aerial R, the resultant being fed to a cathode-ray or other indicator J. The first or direct impact of each signal pulse produces a gain-control voltage at E which is fed back over a lead V to disable the amptiHer HF so far as the reflected " echo " impulse is concerned. A resistance W and condenser C imposes the necessary time constant. The frequency of the transmitted impulses is preferably double that at which the switch U is operated. The arrangement is applicable to automatic " homing "and direction-finding.
Patent GB-612822-A (GB)
Title: Process for the production of organo-substituted silicon compounds
IPC: C07F7/18
Filed: 1945-07-03
Abstract: Organo-substituted silicon compounds are prepared by reacting compounds of the general formula <FORM:0612822/IV(b)/1> or of the formula <FORM:0612822/IV(b)/2> wherein R represents an alkyl group, with an alkyl or aryl halogenide and sodium.  The sodium used may be in a finely divided state or in the form of an amalgam, and may be employed in an amount equal to or greater than 2 gramme atoms per gramme molecule of the halogenide employed.  The reaction may be carried out in the presence of an inert organic solvent, e.g. toluene, xylene, petroleum ether or liquid paraffin, or in the presence of an alkyl orthosilicate, or in the presence of a small quantity of a promoter, e.g. ethyl acetate or amyl alcohol.  The silicon compound used as the starting material may be prepared by refluxing silicon tetrachloride and alkyl orthosilicate in gramme-molecular proportions lying between 1 : 3 and 1 : 1, e.g. by refluxing equimolecular proportions or by refluxing 1 gramme-molecule of silicon tetrachloride and 3 gramme-molecules of an alkyl orthosilicate until the temperature of the boiling liquid becomes constant.  In examples (1) and (2), isoamyltrimethoxy- and di-isoamyl dimethoxy-silicone are prepared.
Patent GB-705371-A (GB)
Title: Improvements relating to twin lens photographic cameras
IPC: G03B13/20
Filed: 1950-07-07
Abstract: 705,371. Twin-lens photographic cameras. HOLMES, J. E. W. March 30, 1951 [July 7, 1950], No. 16974/50. Class 98(1) A twin lens camera of the reflex finder type having the finding lens and the taking lens mounted in a lens panel which is adjusted in a direction parallel to the lens axes for focusing by the operation of a rotary adjusting member, is characterized in that the movement of the lens panel relative to the camera body is guided by a pair of tubular members (or a rod and tube), one of which is secured to the lens panel and is adjustable in or along the other which is secured to the camera body by teeth or screw-threads attached to the rotary member and in driving engagement with complementary elements on the longitudinally movable one of said pair of members. As shown, a tube 16 is fixed in the camera body and an inner sleeve 15 secured to the lens board 12 is movable against a return spring for focusing. The focusing means may comprise a screw 30 secured in a sleeve 43 rotatable about the fixed tube 16 without axial translation by an external wheel 40 extending through the side of the body and engaging in a nut formed in the inner sleeve 15 attached to the lens board, or as in Fig. 2 (not shown), a screw 30 engaging in a nut formed in the fixed tube and extending through the lens board to terminate in a manually operable head, Fig. 3 (not shown), a pinion rotatable by an external knob and engaging a rack on the sleeve secured to the lens board. The lens board may also be guided by a second pair of telescoping tubes which may be duplicate focusing means.
Patent GB-662194-A (GB)
Title: Improvements in scanning devices for television receivers
IPC: H04N5/12
Filed: 1949-06-27
Abstract: 662,194. Television. RADIO-INDUSTRIE SOC. ANON. June 27, 1949 [July 5, 1948], No. 16984/49. Class 40 (iii). [Also in Group XL (c)] In a scanning generator for a television receiver employing a relaxation oscillator 1, 2 for periodically discharging a condenser 10, the oscillator is normally biassed inoperative by a negative potential derived from the received carrier wave by circuit 7a connected between the grid resistor 7 and earth. During normal reception valve 1 functions to reverse the polarity of the synchronizing pulses appearing on its grid, the positive output pulses being applied to render valve 2 conducting, whereby condenser 10 is periodically discharged. In the event of an interruption in the television signal, the bias disappears and allows the circuit to oscillate freely. This ensures that scanning waves continue to be generated in the absence of synchronizing signals and prevents the fluorescent screen of the receiver tube being damaged by a stationary spot.
Patent GB-448587-A (GB)
Title: Improvement in angler's landing net
IPC: A01K77/00
Filed: 1935-06-13
Abstract: A landing net is buoyed with floats to enable the net to float at any desired depth.  A haulage line is secured to the frame.
Patent GB-198229-A (GB)
Title: Improvements in silencers for use with internal combustion engines
IPC: F01N1/08
Filed: 1922-06-20
Abstract: 198,229. Ford, R. June 20,1922. Exhaust-silencers.-A silencer comprises a cylinder A fitted with transverse baffles D having apertures E so shaped that the exhaust gases take a rotary path, the direction of rotation being reversed on passing each baffle. The apertures E are radial slits, formed adjacent up-set walls which cause the gases to take an angular path.
Patent GB-931128-A (GB)
Title: Improvements in or relating to apparatus for feeding sheets
Inventor: AGAR ROBERT LESLIE
IPC: B65H9/10
Filed: 1961-05-11
Abstract: 931,128. Feeding sheets; embossing. MARDON SON & HALL Ltd. May 8, 1962 [May 11, 1961], No. 17138/61. Classes 100 (1) and 100 (2). [Also in Group XVII] Sheets such as box blanks are fed intermittently by pairs of spaced grippers, each gripper being mounted on two spaced endless chains 12 through a lost-motion device, so that on stopping the chains the grippers may be stopped abruptly, both at a first position for receiving a sheet and at a second position for manipulating the sheet (e.g. bending it to form a box), and thereby avoid over-running of the grippers and consequent inaccurate register at those positions, due to the momentum of the conveyer. Each gripper is carried by a baseplate 44, slidably mounted on a bracket 48 by pin-and-slot connections. The bracket 48 is carried by two spaced chains 12. The baseplate 44 and bracket 48 are provided with depending lugs 49, 50 urged apart by springs 51. Two detents 9 are located at each position, one for each gripper, to engage abutments 83 on the base-plates 44 and stop the grippers abruptly. Each detent is carried by a rocker 22, biased clockwise to an operative position as shown in Fig. 6, with the end 85 engaging a stop. The rocker is moved anticlockwise by a solenoid 23, to disengage the gripper. Each gripper comprises a movable jaw 57 carried by a pair of spaced triangular plates 56<SP>1</SP> pivoted at 55 to spaced side walls 54 on the base-plate. The plates 56<SP>1</SP> are connected by links 63 to a second pair of triangular plates 67, pivoted at 69 to the corresponding side walls 54. The links 63 are joined to the plates 56<SP>1</SP> by a pin 59 which extends beyond the side walls to provide extensions 60, 61. The plates 67 are joined by a cross-bar 70. A pair of helical springs normally maintain the upper jaw 57 in contact with the lower jaw. A pair of cranked, hooked, levers 72 pivotally secured to the side walls 54 and connected by a cross-piece 73, are stressed by springs 77 to normally assume the position shown in Fig. 5. On stopping the grippers, the solenoid 82 of each gripper is operated and acts through the cross-bar 70, to pivot the plates 67 and open the jaw 57, the extensions 60, 61 of the pin 59 riding up the hooks 75 until they lock behind them to hold the jaw open. As soon as the sheet is placed flat on the base-plates 44, the solenoids 79 operate to depress the levers 72 via crosspiece 73, to release the jaws 57 and grip the sheet, and the solenoids 23 operate to rock the levers 22 and move the detents 9 clear of the abutments 83. Embossing.-The grippers feed the box blanks 31 vertically downwards one at a time and stop opposite a fixed die 8. A former 26 mounted on an endless conveyer 28 pushes the blank through the die to bend up the side walls of the box. The die comprises a rectangular frame, the lower edge of the frame being slotted to allow the supporting arm of the former to pass.
Patent GB-452460-A (GB)
Title: Improved manufacture of citraconic and itaconic acids and anhydrides
IPC: C07C51/38
Filed: 1935-06-14
Abstract: Citraconic and itaconic acids are obtained in improved yields by allowing a concentrated aqueous solution of citric acid to run into an evacuated vessel heated to 230 DEG  C. or higher, distilling off the anhydrides formed and allowing the mixture of anhydrides to react with water.  According to an example, a solution of citric acid is run into a copper vessel at 280--300 DEG  C. under a pressure of 30--40 mm.  The Specification as open to inspection under Sect. 91 contains an additional example in which a temperature of 320--350 DEG C. and a pressure of 80--90 mm. are employed, the proportion of citraconic acid in the product being increased.  This subject-matter does not appear in the Specification as accepted.