baber/WOPTO huggingface dataset:
Patent GB-659598-A (GB)
Title: Improvements in or relating to radio-receiving circuits
IPC: H03G11/06
Filed: 1949-08-12
Abstract: 659,598. Frequency modulation. PHILIPS ELECTRICAL, Ltd. Aug. 12, 1949, No. 21024. Convention date, Aug. 17. 1948. [Class 40 (v)] In a frequency modulation receiver, variation in amplitude of the F.M. wave is reduced or eliminated by feeding back amplitude changes detected in a rectifier with two separate output filters, one having a short time constant for feeding back audio or like amplitude modulation, the other a long time constant for feeding back slow changes; the audio modulation being pre-amplified in an amplifier preceding the detector before it is used to amplitudemodulate the incoming wave in negative sense. In Fig. 1, the I.F. stages 1, 2 feed a rectifier 3 having two load filters 4, 9. Output from the short time constant filter 4 is fed to the second I.F. stage 2 and is amplified therein as in Specification 646,997, an amplified output across the impedance 7 being fed through a condenser 8 to the grid of the first stage 1, giving a counter-acting modulation to the wave passing through that valve. The other filter 9 feeds its output through a D.C. connection to the grid of the valve 1 to counteract slow changes in amplitude. In Fig. 2 the output from filter 4 is fed to the inner grid 15 of the second amplifier 2 which is of the heptode type. This input is amplified in the impedance 7 placed in the screen circuit or in the anode circuit, and is fed through a condenser 8 to the outer grid 14 of the valve 2. Alternatively, the output from filter 4 may be fed to the outer grid 14 and the amplified voltage across the impedance 7 applied to the grid of the first valve 1. The A.V.C. voltage derived from the filter 9 may be applied to the valve 1 or to an earlier stage of the receiver. The circuit may be arranged to provide silent tuning by biassing the valve 2 so that very weak signals are blocked, this block being removed by the D.C. voltage across the filter 4 raising the grid voltage of the valve 2. A tuning indicator may be connected to the A.V.C. terminal 12, to which a biassed diode may also be connected to delay the A.V.C. action.
Patent GB-686922-A (GB)
Title: Improvements in or relating to apparatus for emptying containers
Inventor: HOWLETT GEORGE
IPC: B65G65/23
Filed: 1950-08-25
Abstract: 686,922. Tipping-apparatus; endless conveyers. WILTS UNITED DAIRIES, Ltd. Aug. 27, 1951. [Aug. 25, 1950] No. 21121/50. Classes 78 (i) and 78 (iv). In apparatus for emptying containers of the kind consisting of an endless belt or chain conveyer which delivers the containers to means for up-ending them over a reservoir or the like, a driven roller is provided at the delivery end of the conveyer which roller is arranged with a portion of its circumference upstanding from the outer surface of the conveyer belt or chain so as positively to traverse each container off the end of the conveyer against a stop arranged to cause the container to tilt. As shown milk churns are conveyed by a pair of endless chains 22, mounted at one end of their travel on sprockets 21 and guided by angle irons 24, 25, to a tipping device, at which the churns are traversed off the conveyer by a pair of pulleys 23, of larger diameter than the sprockets 21 and by the shaft 18 of the sprockets 21. The churns fall against a stop 36 curved to the shape of the churns and the middle part of each churn as it arrives at the stop 36 engages and depresses a roller 30 also curved to the shape of the churns and carried by counterweighted arms 27 pivotally mounted at 26 and constrained to move between stops 34. The churn continues to fall until the mouth is arrested by a grill 37 through which the milk flows to a reservoir (not shown). As the milk is discharged roller 30 rises owing to the lightening of the churn and pushes the churn to a fully inverted position, arms 27 thus returning to their original position ready for the next churn.
Patent GB-586495-A (GB)
Title: Improvements in or relating to firearms
IPC: F41A21/48
Filed: 1944-10-31
Abstract: 586,495. Smallarms. BIRMINGHAM SMALL ARMS CO., Ltd., and PERRY, C. A. Oct. 31, 1944, No. 21206. [Class 119] - The barrel of a rifle is detachably held upon the body of the rifle by a latch or stirrup which fits into a groove formed in the end of the barrel. The breech end of the barrel 1 (Fig. 1) has a groove 5, a shoulder 9 and a flat portion 15. To put the barrel into position it is slid within a casing 17 until the flat portion 15 lies in contact with a transverse pin 33 and the shoulder 9 abuts against the end of the casing. It is then locked by the latch 19 (Fig. 3), hinged at 21 to the casing 17. A leaf spring 27 bears against the faces 23 and 25 of the latch and serves to retain it in either the operative position or the inoperative position.
Patent GB-1427321-A (GB)
Title: Tyre repair vulcanising clamp
IPC: B29C35/00
Filed: 1972-05-06
Abstract: 1427321 Apparatus for repairing tyres DUNLOP Ltd 1 May 1973 [6 May 1972] 21255/72 Heading B7C A tyre repair vulcanizing clamp comprises opposed pads between which the part of the tyre to be repaired may be inserted, and means to apply pressure to the pads to cause the pads to move relatively together and apply, in use, pressure to said part of the tyre, at least one of the pads comprising a holder which incorporates an electrical heater and which has a shoe slidably detachably attached thereto, location means being provided to prevent unintended sliding of the shoe on the holder. The means to apply pressure may be as described in Specification 584,095. The holder 1 of Fig. 1 has an electrical resistance heater embedded in a portion 3 and is provided with ribs 13, 14, Fig. 3, for securing an associated shoe. The holder 1 has a thermostat 9 and cover plates 11 and 12 made respectively of asbestos and metal. The locating means takes the form of a spring-loaded ball 5 of the holder 1, which locates in a depression 16, Fig. 10 of the associated shoe. The holder 1 has a hole 7 for receiving the stem of a tyre valve. In the shoe of Fig. 10 a rubber insert 20 is held in a depression 21 in the shoe.
Patent GB-933530-A (GB)
Title: Improvements in skirt hangers
IPC: A47G25/62
Filed: 1962-06-01
Abstract: 933,530. Garment hangers. H. S. LEE. June 1, 1962 [Aug. 21, 1961], No. 21279/62. Class 52 (5). A garment hanger comprises a diametrically split tube 1, the halves 2 and 3 having clip formations on the longitudinal edges so that they may be clipped together to house compression springs 10, and arms 11 loaded by the spring and telescopically and non-rotatably mounted in slots 6 at each solid end of the tube 1, the arm ending in bent up portions 14 to engage in the waist band of a skirt for example. The hanger may be of polypropylene. Sleeve 9 at the end of hook 8 projects inside tube 1 and locates springs 10.
Patent GB-878050-A (GB)
Title: An improved holder for electric lamp bulbs
Inventor: GREASLEY ERIC ARTHUR
IPC: H01R33/22
Filed: 1959-06-22
Abstract: 878,050. Lamp holders. PRESSAC Ltd. May 30, 1960 [June 22, 1959], No. 21298/59. Class 38 (1). A holder for a screw-type lamp bulb is formed of plastic, e.g. nylon, polythene, &c., and is provided with an end wall 2 which yields to end thrust exerted when a bulb is screwed home in the holder. Distension of the end wall draws the cylindrical wall of the holder into contact with the bulb shank so that the bulb does not become loose in the holder when the latter is subjected to the heat of the bulb. A contact strip 5 for the shank of the bulb is accommodated within a groove formed in a threaded portion 4 of the holder. A securing channel 6 is provided.
Patent GB-797272-A (GB)
Title: Improvements in or relating to methods of generating electrical energy, involving accurately maintaining the rated voltage of a synchronous generator or of a similar generator
IPC: H02P9/38
Filed: 1954-07-21
Abstract: 797,272. Alternators. SIEMENS-SCHUCKERTWERKE AKT.-GES. July 21, 1954 [July 21, 1953; Oct. 30, 1953; March 23, 1954], No. 21338/54. Class 35. An alternator is compounded to provide a desired fixed value of output voltage at three points in its operational range, say, at no load and at two different power factors at full load, by feeding its exciting winding from a rectifier supplied by a transformer having primary windings energized, respectively, by the current and voltage of the machine, the voltage windings being fed through impedances having such a value and so connected as to produce in these windings a predetermined phase displacement determined by measurement from a vector diagram representing the ampere-turns of the transformer at the different operational points. Several circuits for effecting different phase dis-. placements are described. Fig. 4 shows the exciting winding 6 of an alternator 5 supplied over a rectifier 7 from a transformer 8 having windings, 18 carrying the load current, and windings 9 connected in mesh across the phases R, S, T of the machine through resistors 11 and chokes 10 in series with the windings.
Patent GB-249805-A (GB)
Title: Improvements in or relating to adjusting mechanism
IPC: H03J1/14
Filed: 1925-08-26
Abstract: 249,805. Gischow, O. R. March 25, 1925, [Convention date]. Wireless tuning-apparatus, adjustment devices for. - Adjusting mechanism, affording both a fine and a coarse adjustment, and particularly applicable for electric condensers, comprises toothed discs 15<1>, 171 engaging each other but having differing numbers of teeth. The disc 15<1>, which remains stationary during the operation of the fine adjustment, is separated from the panel p by a pad 36; the other disc is engaged by the end 20 of a spring finger 25<1> rotated by the dome 50. The disc 17<1> is secured to the sleeve 21<1> and through it to the shaft 22; the rotation imparted depending on the numbers of teeth on the two wheels. The edge projecting beyond the dome 50 is calibrated to indicate the adjustment. Coarse adjustment is effected by the knob 51 secured directly to the sleeve 21<1>, the two toothed wheels rotating solidly with the spindle and sleeve. Modifications are described in which the knob for fine adjustment is at the outer end of the shaft 22, and also in which it surrounds the knob for effecting coarse adjustment, and access to the inner knob being obtained through perforations in the outer.
Patent GB-465190-A (GB)
Title: Improvements relating to machine tools
IPC: B30B15/00
Filed: 1935-07-27
Abstract: 465,190. Toothed gearing. SHEARMAN, C. H. HOWLAND-. July 27,1935, No. 21434. Void. Convention date, July 27, 1934. [Class 80 (i)] [Also in Group XXVI] A flywheel 19 for storing energy between the working phases of a tool such as a press, planer, &c. is carried on a shaft 14 driven by step-up herringbone gears 36, 23 from the power-shaft 30 of the tool. The shaft 14 is mounted in rollerbearings 15, 16 with provision for a slight amount of end-play in them to allow the gears 23, 36 to take up their natural relative positions. It is stated that when power is being delivered to the flywheel the gear 36 tends to move to the right, when the thrust is taken by a thrust-bearing 35, and that when the flywheel is delivering energy the gear 23 tends to move to the left, the thrust being then taken by a thrust bearing 21.
Patent GB-960872-A (GB)
Title: Improvements in or relating to photographic developers
IPC: G03C5/38
Filed: 1960-06-17
Abstract: 960,872. Photographic developers. W. WALKER. June 17, 1960, No. 21442/60. Heading G2C. A photographic developer is prepared by boiling from 140-160 parts by weight of sodium sulphite (anhydrous) and from 2<SP>1</SP>/2 to 20 parts by weight of metol in sufficient water to make 1000 parts of solution. It is particularly useful for tropical development at temperatures of 85-126‹F. Development and fixing may be effected in one operation by leaving the emulsions for extended times in the developer. -
Patent GB-308561-A (GB)
IPC: G09F13/00
Filed: 1928-07-24
Abstract: 308,561. M³ller, G. G. March 23, 1928, [Convention date]. Globes.-A lamp comprises a hollow translucent one-piece unit 1 having only flat sides, one of which is used for introducing and supporting an electric lamp bulb 2. The flat sides enable the lamp to stand alone on a flat surface or to be associated with like lamps in a substantially contiguous pack. The unit 1 may be of square, rectangular, hexagonal, or triangular cross-section, and may be made of glass, porcelain, celluloid, or other lightpermeable material. The unit 1 or bulb 2 may be coloured. Reflectors may be provided at one or more sides of the unit.
Patent GB-1073969-A (GB)
Title: Hydraulic system for slewing a crane boom
IPC: B66C23/72
Filed: 1964-12-10
Abstract: 1,073,969. Slewing mobile jib-cranes. JEFFREY GALION MANUFACTURING CO. Dec. 10, 1964 [Dec. 26, 1963], No. 21494/66. Divided out of 1,073,968. Heading B8B. A mobile hydraulically-operated jib-crane, which forms the subject matter of the parent Specification, has a hydraulic motor 70 for slewing the boom, pressure relief valves in the supply lines to the motor for dissipating the energy of the slewing parts when the supply of fluid is interrupted, and a brake 63 which becomes operative to hold the slewing mechanism stationary when the pressure of the hydraulic supply to the motor drops. The brake is applied by a spring and released by a hydraulic ram connected to the hydraulic supply to the slewing motor 70. The application of the brake is delayed until the slewing parts have come to rest.
Patent GB-732321-A (GB)
Title: Closures for tiltable dispensing valves
Inventor: SOFFER JACK W
IPC: B65D83/14
Filed: 1953-08-04
Abstract: 732,321. Valves. DEVELOPMENT RESEARCH, Inc. Aug. 4, 1953, No. 21508/53. Class 135. [Also in Group XXVIII] In a container for aerosols from which the contents are discharged when an outlet spout 15 carrying a disc valve 14 is tilted, a cover 21 for the spout has a screw-thread connection therewith so that, as the cover is screwed down, a skirt 25 thereon engages and presses on the adjacent wall of the container to hold the spout and valve in the closed position and prevent them from being inadvertently tilted. The valve seats on a resilient grommet 6 which, when the cover is screwed down, has its upper surface 9 flattened against the wall 3 of the container. When the valve is tilted, the contents of the container can flow through ports 12 into the lower end of the spout. A helical compression spring may be located between the top of wall 3 on the container and a shoulder 31 on the spout. Specification 672,436 is referred to.
Patent GB-737925-A (GB)
Title: New crystalline sodium borate
Inventor: BALL GEOFFREY ROBERT
IPC: C01B35/12
Filed: 1952-08-27
Abstract: <PICT:0737925/III/1> Sodium borate monohydrate is produced by heating a sodium borate or mixture of sodium borates having a molar ratio Na2O : B2O3 between 0.4 and 0.7 and a water content as hereinafter defined, in a closed vessel until equilibrium is attained or until a sufficient quantity of monohydrate crystals have deposited from solution, and to a working temperature which is dependent as hereinafter defined on the molar ratio and water content, filtering and washing the product.  Fig. 1 is an isothermal diagram of the relevant part of the system Na2O-B2O3-H2O at 150 DEG  C.: B represents pure sodium borate monohydrate, C a borate produced by Augers ("Augers sodium borate") and A the ternary point at which the solubility curves AD and AE of Augers sodium borate and the monohydrate, respectively, meet.  The water content of the starting materials is so chosen that it lies within the area marked "1 : 2 : 1 + soln" on Fig. 1, or within the corresponding portions of similar isothermal diagrams.  Below 115 DEG  C., however, sodium diborate monohydrate is not formed.  By adjusting the operating temperature and the water content, any ratio Na2O : B2O3 from 0.4-0.7 may be used.  This ratio may be adjusted by adding sodium metaborate, boric acid, or caustic soda. Water in addition to that present in the crystalline material employed may be added.  Preferred starting materials are mixtures of borax deca- or pentahydrate and crystalline sodium metaborate or caustic soda.  The preferred process uses a molar ratio of 0.52, a total water content of 35 per cent by weight of the starting materials and a temperature of 170 DEG  C.  Other advantageous proportions and temperatures, and examples, are given.
Patent GB-1156912-A (GB)
Title: Araliphatic Compounds Containing Fluorine
Inventor: MCLOUGHLIN VICTOR CONRAD RICHA
IPC: C07C17/26
Filed: 1965-05-21
Abstract: 1,156,912. Araliphatic fluoro compounds. NATIONAL RESEARCH DEVELOPMENT CORP. 18 Aug., 1966 [21 May, 1965], No. 21636/65. Heading C2C. A process for the manufacture of a fluorinated organic compound having an aromatic group directly connected to a fluorinated alkyl group comprises reacting an aromatic compound having an aromatic nucleus with a reactive halogeno-substituent, a fluorinated alkane having a reactive halogeno-substituent and metallic copper in a dipolar aprolic organic solvent at between 90 and 200 C. and separating out the resulting desired fluorinated organic compound formed. The term "reactive halogeno substituent" includes iodine and bromine in general and chlorine when activated, e.g. when attached to a triazine ring or when ortho to a nitro group in a benzene ring. Dipolar aprolic solvents specified include diacyl dialkylamides, dialkyl sulphoxides, pyri - dines and quinolines, pyridine and quinoline N-oxides and hexamethylphosphoramide. Products of which the preparation is described in examples are 1-phenyl heptafluoropropane, 4 - phenyl hexafluorobutanoate, pentadecafluoroheptyl benzene, o - heptafluoropropyl nitrobenzene, 2,2,2 - trifluoroethylbenzene, 1,2 - di - (3 - pyridyl) hexafluoropropane and 1,3 - disubstituted hexafluoropropanes in which the 1 and 3 substituents are the same and are phenyl, m-tolyl, m-methoxyphenyl, m-nitrophenyl, m-acetoxyphenyl, m-ethoxyphenyl, p- and m-methoxy-phenyl-, 4,6-dimethoxy-s-triazinyl- and 3-(#-phenylhexafluoropropyl)-phenyl.
Patent GB-1335277-A (GB)
Title: Crop driers
IPC: A01D43/00
Filed: 1971-04-19
Abstract: 1335277 Crop driers C VAN DER LELY NV 19 April 1971 [13 Feb 1970] 21684/71 Heading F4G Dried crop is carried out of a drying chamber 1 through an opening in its end wall by an endless conveying member 3 and falls therefrom into a guide trough 7 extending obliquely down the outside of the end wall of the chamber 1. The trough 7 is secured to one door 2 of a pair of doors 2, 2A, (which are opened to allow the drying chamber 1 to be charged with crop to be dried) but the trough 7 may be divided into two ports, one secured to each door. The side of the trough 7 remote from the doors 2, 2A is provided with a wind screen 23 which extends from bottom to top of the trough 7. The trough 7 extends horizontally into a feeder 8 communicating with the housing of a blower 9 delivering via duct 10 to a store (not shown). A blower 6 blows air from heater 5 into a chamber 4 whence the air passes through the floor of the chamber 1 and an endless conveyer (not shown) thereon. In another embodiment, a single blower communicates with a branched duct, one branch being connected to the chamber 4 and the other terminating in a delivery channel into which crop is fed from the trough 7 by means of a feeder, for delivery by air to a store. Either branch may be selectively closed by a flap. The feeder may comprise spring-loaded pivoted flaps which pivot under the weight of crop, or resilient driven rollers pressing against each other and sealing material around them.
Patent GB-725249-A (GB)
Title: Improvements relating to the manufacture by die casting of rotors for electrical machines
IPC: H02K15/00
Filed: 1953-08-06
Abstract: 725,249. Squirrel cage constructions. GENERAL MOTORS CORPORATION. Aug. 6, 1953 [Aug. 16, 1952], No. 21689/53. Class 35. [Also in Group XXII] In a rotor for an electrical machine comprising a pack of laminµ 21 held between a pair of conductor rings 35, 40 interconnected by conductor bars B passing through perforations in the laminµ, the rings and bars are unitary and are die cast in position, and the rings are of substantially semi-circular crosssection.
Patent GB-638578-A (GB)
Title: Improvements in or relating to density measuring apparatus
IPC: G01N9/10
Filed: 1947-08-08
Abstract: 638,578. Density measuring apparatus. ELECTROFLO METERS CO., Ltd. Aug. 8, 1947, No. 21813. Convention date, July 29, 1944. [Class 97 (iii)] In density measuring apparatus comprising a pivoted balance beam, the tilting of the beam due to variations in the density to be measured is opposed by a tilting force exerted by means responsive to a regulated pressure produced by means controlled by tilt of the beam, the regulated pressure being measured to indicate density. The beam 10 pivoted at 14 to the frame 13 by pressure-sealing means described in Specification 635,731, [Group XIX], carries at one end a member 19 arranged to be displaced by the fluid flowing through the chamber 15 and whose density is to be measured. The other end of the beam 10 carries a valve member 36 regulating the discharge of fluid from a valve chamber 32 which communicates with a chamber 29 having a flexible diaphragm 28 connected to the beam 10 by a rod 31. The beam 10 regulates, the pressure in the chamber 29 to balance itself automatically against any tilting produced by the density responsive member 19, so that the regulated pressure as indicated on the gauge 39 is proportional to the density. The calibration and range of the scale of the density readings on the gauge 39 may be adjusted by means of a weight 42 mounted to slide to both sides of the pivot 14 of the beam 10 along a calibration scale 41, an additional adjustable counterweight for zerosetting being provided on the end of beam 10 if required. To avoid disturbance to the density responsive member 19 due to the flow of fluid through the chamber 15, the fluid is introduced to or exhausted from the chamber in two equal streams by means of ports 18, and is exhausted from or introduced to the chamber by means of a pipe 23 communicating with an annular tube 25 having a plurality of ports arranged around its inner periphery, which communicate with the inside of the chamber. In another embodiment the fluid is circulated through the density responsive member by means of two flexible connections located at its upper and lower ends which also serve to maintain the member upright in the bracket by means of which it is pivoted to the beam.
Patent GB-1468485-A (GB)
Title: Method of producing bimetallic strip
IPC: C22C38/00
Filed: 1975-05-21
Abstract: 1468485 Making saw &c strip; welding by fusion FAGERSTA AB 21 May 1975 [30 May 1974] 21839/75 Headings B3A and B3R [Also in Division C7] Hard-edged strip for saws is made by rolling strip backing metal down to a thickness of 10 mm or less and fusing a filler metal together with the backing metal to form an alloy run of greater hardness than that of the backing metal. The filler metal may be deposited in a groove in an edge of the backing by gas-metal-arc gastungsten-arc or plasma arc welding. Filler metal may be in the form of a wire or powder e.g. in a tube. Alternatively, a plurality of runs of the filler metal may be applied to a backing strip from one or both sides and the strip severed, after cold rolling to consolidate the weld, through the runs so that each provides two hard edges. Instead, cuts can be made in the backing adjacent the runs.  A spring-steel backing has the following composition, percentages by weight:- C 0À45%, Cr 4À2%, Mo 0À85%, V 0À15%, balance Fe. A filler for combining with a backing to produce high-speed steel has the following composition:- Cr 3À5-5À0%, Mo 2À5-25%, W 2À5-50%, Co up to 30%, V 1À2-10%. High-speed steel obtained using the filler has the following composition:- C 0À6-1À2%, Cr 2À0-5À0%, Mo 1À0-10%, W 1À0- 20%, Co up to 12%, Va 0À5-4À0%, balance Fe.