baber/WOPTO huggingface dataset:
Patent GB-572056-A (GB)
Title: Improvements in or relating to nitrourea and compositions containing the same
Filed: 1944-02-09
Abstract: A nitrourea composition is prepared by mixing nitrourea, so purified from the acid occluded in it due to the manner of its manufacture from urea nitrate that in the dry condition it withstands a defined stability test, with a relatively small amount of a non-volatile acid or acid salt.  In the examples, compositions containing sulphuric acid, phosphoric acid, oxalic acid, tartaric acid, ammonium acid sulphate, sodium acid sulphate and sulphamic acid are prepared and their stability tested. Other acids which may be used are stated to be propionic acid, acetic acid and benzene sulphonic acid.  If the nitrourea is mixed with inert solids, these may be pretreated with the stabilizing agent.  Specification 567,422 is referred to.
Patent GB-1319757-A (GB)
Title: Childrens musical toys
IPC: G11B25/04
Filed: 1972-01-18
Abstract: 1319757 Toy musical instruments DICKER INTERNATIONAL Inc 18 Jan 1972 [30 April 1971] 2453/72 Heading A6S [Also in Division H1] A toy musical instrument comprises a body simulating a wind instrument and having a blowing tube 28, a body portion 16 containing a battery-powered gramophone 18, a switch 48, &c. in the gramophone motor circuit being closed by blowing down the tube. The switch 48, &c. includes a flexible contact 50, bent into engagement with the adjacent rigid contact shown when the tube 28 is blown down, by a plug 32 slidden leftwards in the tube end. The instrument may be made of plastics, &c.
Patent GB-661201-A (GB)
Title: Improvements relating to equipment for measuring the speed of rotation of rotating apparatus
Inventor: PEDLEY DAVID
IPC: G01P3/48
Filed: 1949-01-28
Abstract: 661,201. Electric inducting systems. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Jan. 17, 1950. [Jan. 28, 1949] No. 2457/49. Class 40 (i). [Also in Group XL (b)] The speed of a rotating member is measured by photo-electrically generated pulses produced by evenly spaced marks round the periphery of the member these pulses being used to trigger an electronic impulse generator to produce pulses of equal amplitude which are averaged to indicate the speed. As shown the photocell P, which receives light reflected from radial marks on a disc and which may be mounted in a "head" with an associated amplifier feeds impulses to a phase splitting valve V1, the outputs from the cathode and anode of which are fed to amplifying valves V3, V2 respectively. The voltage pulses developed across the anode loads of these two valves are used to trigger a conventional flip-flop circuit comprising valves V4, V5. This circuit changes its stable position on receipt of a pulse and back again when the pulse ceases. The constant amplitude pulses developed at the anodes are fed through a differentiating circuit to the grids of a pair of triodes V6 with an indicating or recording meter M in their common anode circuit. The grids of these valves are so biassed by resistors R14, R15 that the negative pulses from the flip-flop circuit have. no effect. Valves V4, V5 may be contained in the same envelope.
Patent GB-1255357-A (GB)
Title: Film testing apparatus
IPC: H01S3/00
Filed: 1969-01-15
Abstract: 1,255,357. Photo-electric flaw detection. GAF CORP. Jan. 15, 1969 [Jan. 16, 1968], No.2473/69. Heading G1A. In an arrangement for detecting flaws in a running web of film using a transversely scanning laser beam, a mask is included in the path of the beam after its impingement on the film to preclude the reception of the beam by the transducer whilst the beam is traversing the region beyond the width limits of the film, the mask being designed so that transition from film to mask and vice versa produces a low-frequency signal, and a high pass filter being included in the output circuit to reject the low frequencies. The beam may be scanned by a rotating multi-sided mirror, and the reflected light used for monitoring. The mask may be in the free beam path, on the face of the transducer, or on the two ends of a spherical mirror. In the last named arrangement, the position of the mask at one end may be adjustable.
Patent GB-396381-A (GB)
Title: Improvements in the manufacture of bricks or blocks
IPC: B28B1/04
Filed: 1932-01-27
Abstract: 396,381. Moulding concrete &c. blocks in tamping-machines. HALL, L., 85, William Street, Sheffield. Jan. 27, 1932, No. 2507. [Class 87 (ii).] A tamping-machine for solid or hollow blocks comprises a tamping member j carried by a sliding frame b raised by applying tension by hand to the belt c thus making the driving-pulley d effective to raise the frame until the tension is released at any desired point thus allowing the frame to drop repeatedly by gravity from any height desired. A pivoted catch f sustains the frame when desired. The hollow cylindrical mould h is fixed on a table g and carries a pallet supported on the upper end of an ejector plunger k which is balanced by a weight q and raised and lowered by the rack- and-pinion gear p actuated by a chain from the handwheel m. The guides a are adjustable on the table g and platform e by means of screws n, o respectively.
Patent GB-988301-A (GB)
Title: A process for treating stable aqueous dispersions of addition polymers
IPC: C08C1/07
Filed: 1963-01-21
Abstract: An aqueous dispersion of a solid organic addition polymer is mixed with a component A which (a) consists of one or more organic liquids, (b) does not give an acid reaction towards the aqueous phase, (c) has a boiling point between - 50 DEG  and +200 DEG  C., (d) at the remperature and pressure of the treatment has a solubility not exceeding 10 grams in 100 ml. of water and (e) is such that, in relation to the addition polymer, the value of the Flory-Huggins interaction parameter of the organic liquid or of the collective organic liquids is lower than 0.6 and with methanol, the weight ratio of the sum of the solid addition polymer and component A to the sum of water and methanol being at the most 5, and then component A is removed from the dispersion.  The dispersion may have been produced by emulsion polymerization and the methanol may be mixed with the dispertion simultaneously or after component A. The dispersion may be of styrene-butadiene, polybutadiene, polystyrene, nitrile rubbers, neoprene, polyisoprene, polyvinylchloride, polyvinyl acetate, natural rubber, polyisobutene, butyl rubber and ethylenepropylene copolymers.
Patent GB-1249723-A (GB)
Title: Improvements in or relating to rearview mirrors
Inventor: HELLE ROBERT JOHN
IPC: B60R1/06
Filed: 1969-01-16
Abstract: 1,249,723. Rear-view mirrors. R. J. HELLE. 16 Jan., 1969, No. 2677/69. Heading B7J. A rear-view mirror assembly 10 comprises a pedestal 17, a mirror 11 adjustably mounted on the pedestal 17, first position-indicating means 21 fixed relative to the pedestal 17 and second position-indicating means 20 fixed relative to the mirror 11, the first and second position-indicating means 21, 20 co-operating without physical contact therebetween to indicate the positioning of the mirror with respect to the pedestal 17. As shown in Fig. 1, the mirror 11 has a rim 13 which is marked with a series of spaced parallel circular strips 20 which co-operate with a plurality of markings 21 angularly spaced round the open edge of a semi-ellipsoidal wind deflector housing 23. In an alternative arrangement, Fig. 3 (not shown), the housing is a cylinder and in a further arrangement, Fig. 7 (not shown), the housing edge is transparent with a plurality of spaced parallel circular lines whilst the rim of the mirror is marked with a plurality of angularly spaced lines. As shown in Fig. 4, a guide pointer 40 of four-pointed star shape and mounted on a stem 44 extending from pivot joint 34 through an aperture 45 in housing 43 co-operates with a series of angularly spaced marks 41 around aperture 45. In an alternative arrangement, Fig. 6 (not shown), the pointer is fixed directly to the mirror supporting stem and the marks are arranged around the pivot joint.
Patent GB-160842-A (GB)
Title: Improvements in thermostatic regulating or controlling apparatus
IPC: H01H37/48
Filed: 1917-02-26
Abstract: 160,842. McNeil, A. H. Feb. 26, 1917. Electrically -tripped switches.-A thermostat of the type in which an expansion element operates an electric switch is used in combination with an electric system of control as shown in Fig. 3. In the system the main heating circuit e is adapted to be closed against the action of a spring s' by a switch s, controlled by a coil or relay f and adapted to be locked in the closed position by a locking arm j controlled by a spring j<1> and a relay k. The relays f, k are arranged in an auxiliary circuit and controlled by contacts d<2>, d<3>, co-operating with a contact blade d operated by the thermostatic element. In the position shown a rise in temperature has brought the blade d into contact with the contact d<2> and the heating circuit e has been opened. When the temperature falls until the blade d and contact d<3> meet, a circuit will be closed through contacts m, m' and the relay f, thus closing the heating circuit e and allowing the spring j<1> to pull down the locking arm j and separate the contacts m, m<1> and close the contacts l, l<1>. If the circuit through the contact d<2> should again be made the relay k is energized and the locking arm j raised, thus opening the main heating circuit, separating the contacts l, l<1> and closing the contacts m, m<1>.
Patent GB-468397-A (GB)
Title: Improvements in and in the manufacture of pistons
IPC: F02F3/04
Filed: 1936-01-30
Abstract: 468,397. Pistons. W. P. (LYMINGTON), Ltd., and HOWLETT, J. W. Jan. 30, 1936, No. 2826. [Class 122 (i)] [Also in Group XXII] A piston comprises a steel skirt 2, having flats 6 pressed therein, and an aluminium or other light alloy head 3 cast with gudgeon-pin bosses 4 engaging the flats 6. These have openings 8 which may each have a plane, perforated, or discontinuous flange 9 to be engaged by the cast metal. The skirt may have longitudinal, inclined H, T, or other slits or longitudinal or other grooves. As the head 3 is secured to the skirt only at the middle of the flats 6, variations of temperature cause these to flex but do not distort the bearing surfaces 2. Specifications 321,092, [Class 122 (i)], 400,131, and 439,796 are referred to.
Patent GB-940879-A (GB)
Title: Improvements in accelerator valves for train braking systems
Inventor: MARSH GERALD CRANTON
IPC: B60T13/46
Filed: 1961-01-25
Abstract: 940,879. Accelerator valves. GRESHAM & CRAVEN Ltd. Dec. 22, 1961 [Jan. 25, 1961], No. 2890/61. Heading F2F. An accelerator valve for train braking systems comprises first and second chambers 10, 15 betwen which is a first valve seat 19 normally closed by a valve element 17 which is resiliently loaded by a spring 20 into engagement therewith and is carried by a movable member 13. The valve element has a first choke 27 extending therethrough so as to restrict communication between the chamber 15 and a third chamber 16 and is movable against the spring 20 into engagement with a second valve seat 25. The arrangement is such that when the valve element moves into engagement with the seat 25 communication between chambers 10 and 16 is provided only through the first choke 27 and a second choke 28 which is more restricted than the choke 27. In emergency operation an increase in the pressure of vacuum train pipe 11 causes the valve element to move into engagement with seat 25 so as to connect the train pipe to atmosphere via vent 21. After the vacuum in chamber 16 has been destroyed at a predetermined rate through the choke 28 the valve element 17 re-seats on seat 19.
Patent GB-1338848-A (GB)
Title: Ignition systems for internal combustion engines
IPC: F02P7/067
Filed: 1972-01-21
Abstract: 1338848 I C engine ignition systems ROBERT BOSCH GmbH 21 Jan 1972 [22 Jan 1971] 2951/72 Heading F1B An astable multivibrator feeds a signal to the primary of a transformer, the resultant signal at the secondary being attenuated in dependence upon the crankshaft position by means of a rotary core driven in synchronism with the engine and subsequently demodulated, the demodulated signal being fed to a control circuit to produce a spark at a spark plug in response to a drop in the signal voltage at the secondary. An approximately 1MHz signal generated by a multivibrator 11 is fed via an emitter follower 46 to the primary 13 of a transformer 12. The primary 13 and secondary 14 are wound on separate iron cases separated by an air gap. At least one strip 104 of magnetically and/or electrically conductive material depending from the periphery of a plastics disc mounted on, e.g, the engine distributor shaft, sweeps through the air gap once per revolution of the shaft to attenuate the signal induced in the secondary 14. This signal is demodulated by a diode 53 and capacitor 54 and fed to a Schmitt trigger 58, 61 which is coupled by amplifiers 75, 81 to a power transistor 85 which controls the current through the primary of the ignition coil 71. When the strip 104 passes through the air gap, the resultant drop in the demodulated signal fed to the Schmitt trigger causes an abrupt cessation of the primary current of the ignition coil 71 to produce a spark at a spark plug 93. The ignition system may be of capacitor discharge type.
Patent GB-535281-A (GB)
Title: Staybolt plugs and the method of making the same
IPC: F22B7/16
Filed: 1940-02-17
Abstract: 535,281. Steam boiler stay bolts. STEVENS, A. H. (Flannery Bolt Co.). Feb. 17, 1940, No. 3059. Drawings to Specification. [Class 123 (ii)] A porous ceramic plug inserted in the end of the tell-tale hole of a boiler stay bolt has its pores restricted by a deposit of water glass or like substance. The particles from which the plug is formed preferably are of a mesh not exceeding 240 to the inch. The plugs are placed in a vessel which is evacuated and then filled with a solution of water glass or salt. The plugs are then dried and treated to render the deposit insoluble in water.
Patent GB-946943-A (GB)
Title: Improvements in artificial reverberation units
Inventor: TUCK KENNETH ERNEST
IPC: G10K15/10
Filed: 1961-01-26
Abstract: 946,943. Reverberation systems; piezo-electric transducers; electromechanical delay lines. SYDNEY S. BIRD & SONS Ltd. Jan. 25, 1962 [Jan. 26, 1961], No. 3146/61. Headings H3U, H4J and H4R. An artificial reverberation unit comprises a plurality of helical springs 21, 22 acting as delay lines of different delay times and a piezoelectric transducer 11 coupled to springs 21, 22 through a yoke 24 which acts as a partially reflective termination of the springs and a partially transmissive coupling between the springs. Spring 21 is coupled to a second transducer 12, also of piezo-electric type. Transducer 11 is the input transducer and transducer 12 the output transducer. Each transducer 11, 12 comprises a body 13 enclosing a piezo-electric crystal (not shown) and a slotted block 14 cemented to the crystal and projecting out of the body 13. At each transducer a wire 15 is hooked at one end to the body 13 and passes through the slot in block 14. Each wire 15 vibrates transversely. At the output of the unit an amplifier 18 with a volume control 19 and a tone control 20 is provided. Spring 21 is of stainless steel and is made of two linked spring elements. Spring 22 is connected to a reflective termination 23 and its reverberation time may be adjusted by a clamping device movable along the length of the spring. The unit has a plug 10 for connection to the extension speaker socket of a radio receiver, record player or electrophonic organ. The loudspeaker of the radio receiver &c., provides unreverberated sound and the reverberation unit supplies the delayed sound. In an attachment for an electrophonic organ, two long springs of different delay times are used and both go to separate output transducers, the outputs of which are combined before amplification.
Patent GB-514371-A (GB)
Title: Improvements in and relating to methods of treating ferrous metals
IPC: C23C8/80
Filed: 1938-02-02
Abstract: 514,371. Treating ferrous metals. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 2, 1938, No. 3267. Void. Convention date, Feb. 24, 1937. [Classes 72 and 82 (ii)] A method of treating ferrous metal consists in oxidizing the metal at an elevated temperature to form a tightly adhering, electrically insulating film or coating of oxide thereon and immediately thereafter annealing the oxidecoated metal in an .enveloping non-oxidizing gaseous atmosphere maintained at a temperature not substantially exceeding 1300‹C. The treatment is particularly applicable to sheets or punchings of silicon steel used for magnetic purposes in electrical devices such as magnetic cores for transformers or dynamo-electric machinery. In one method the punchings may be stacked in trays. The stacking may be vertical, i.e., on edge, and if the sheets are curved they may be straightened by dividing into small stacks and arranging adjacent stacks to have opposing curvature. The loaded trays. are fed to a furnace, e.g., of an electric elevatortype, and heated first in an oxidizing atmosphere so as to form an adherent insulating film of oxide on the sheets. Volatile matter escapes through a vent in the furnace and is replaced by fresh air. Dry hydrogen is then passed into the furnace, for example, shortly before the oxide film has reached its maximum. thickness. The amount of hydrogen introduced is insufficient to reduce the oxide layer completely. The hydrogen may be introduced immediately after the formation of the desired thickness of coating or during its formation between the temperatures of about 700‹C. to about 1300‹C., and preferably at about 800‹C. After this annealing process the material is cooled in a non-oxidizing atmosphere to a suitable temperature, e.g., about 600‹C., for example, by covering with a drum and then exposed to air. If desired a continuous furnacemay be used and a zone provided for the removal of volatile matter and heated by the waste heat from the annealing zone. In a further embodiment steel laminations such as used in electric motors may be assembled in proper position in the iron shell of the motor and the entire assembly including the iron shell be heat treated as above.
Patent GB-265379-A (GB)
Title: Improvements in anti-glare spectacles or eyeglasses
IPC: G02C7/16
Filed: 1926-02-05
Abstract: 265,379. Cooper, F. W. Feb. 5, 1926. Goggles; spectacle lenses. -The lenses of spectacles &c. have approximately threefourths of their surfaces scored with lines d to obscure strong rays of light, leaving a plain, clear or cut away portion c situated centrally through which ordinary vision may be obtained. The lines may be tinted or coloured at the obscured portions or may comprise screens of metal or thread gauze having portions cut away for clear vision.
Patent GB-491780-A (GB)
Title: Improvements in or relating to tool grinding apparatus
IPC: B24B3/34
Filed: 1937-02-04
Abstract: 491,780. Grinding. STEVENS, A. H. (Sundstrand Machine Tool Co.) Feb. 4, 1937, No. 3343. [Class 60] A tool is ground with top or side rake, by the flat face 10<1> of a cup-shaped grinding-wheel 10, and for this purpose is swung about an axis outside the periphery of the wheel. The machine employed for grinding may be that described in Specification 452,060, and secured to the work-table 17 thereof by means of bolts 26 and a T-slot 27 is a base 25 having ways 28, 29 thereon, perpendicular to the face of the wheel 10, carrying a slide 31 adjustable along the ways by a screw 32 and a nut 25<1>. The slide has a split part formed with a bore 40 in which is adjustably clamped a bushing 42 rotatably carrying a shaft 44 having at one end a handle 45 and at the other end a U -shaped head 46. The limbs 46<1>, 46<11> of the head respectively support a shoe 48 mounted on a pin 50, and a shoe 47 located by a plug 49 fitting a recess 51 in the shoe and a recess 53 in the limb 46<1>, and mounted in arcuate surfaces 47<1>, 48<1> of the shoes is a cylindrical tool-holder 60 having therein. a square opening 62 in which the tool T to be ground is clamped by screws 63. The holder 60 is angularly adjustable with the aid of a scale 64 to give the required side rake to the tool, and the tool may be adjusted, for top rake, about the axis of the pin 50 and the plug 49, with the aid of a scale 65 ; the holder is clamped in adjusted position by a screw 61 mounted on the limb 46<1> and engaging the plug 49. In operation, the tool, after adjustment for the rake angles, is oscillated, by the handle' 45, across the face 10<1> of the wheel 10, reversal of the movements taking place with the tool out of contact with the wheel. The axis of oscillation of the shaft 44 and the axes of adjustment of the tool-holder all intersect.
Patent GB-881963-A (GB)
Title: Improvements in or relating to sectionalised crates for carrying bottles or other containers
Inventor: MORTIMER HAROLD
IPC: B65D71/52
Filed: 1959-01-30
Abstract: 881,963. Crates. BIRKBYS Ltd. Jan. 20, 1960 [Jan. 30, 1959], No. 3352/59. Class 18. A carrying crate for bottles comprises a plurality of multi-cell units of moulded plastics material A, B, C, each unit presenting a keyway 14 at its point of contact with adjacent units in to which a key 13 is inserted to secure the units together. The units are bound together by bands 10, which are corrugated to conform with the shape of the units and which are retained between ribs 24, 25 and 26, 27, the upper band 10 being provided with loops 11 for attaching a carrying handle 12. Each cell has a hole formed through its base and has a protective rib 17 on its underside to facilitate stacking. The corner cells A, B are of uniform height but the inner cell units C, Fig. 6, may be stepped.
Patent GB-1003483-A (GB)
Title: Improvements in the lubrication of bearings
Inventor: FULLER DUDLEY DEAN
IPC: F16C32/06
Filed: 1963-01-28
Abstract: 1,003,483. Bearings. EASTERN ROLLING MILLS Inc. Jan. 28, 1963, No. 3357/63. Heading F2A. A fluid bearing is supplied with a controlled flow of pressurised lubricant from an external source. In an embodiment, bearings 13, Fig. 2, each have a recess 14 continuously supplied by a pre-determined flow of lubricant through a pipe 15 connected to a supply-line 25. The lubricant is returned to a reservoir 17, Fig. 4, via grooves 16, Fig. 2, in the bearing 13 and a pipe 18. Seals are provided at 19. The supply-line 25, Fig. 4, is connected to a fluid-actuated pump 26 having a cylinder 31 with a piston 32 therein forming at one end a chamber 33 for the lubricant and at the other end a chamber 34 for electric motor 39. The valve effects a controlled flow of power fluid into the chamber 34 to cause the piston 32 to rise and thus discharge lubricant through the line 25 into the recess 14, Fig. 2, of the bearing. When lubricant is recharged into the chamber 34, Fig. 4, a solenoid valve 27, in the line 25, is closed, the solenoid control of the hydraulic power fluid. The chamber 34 is supplied with the power fluid through a line 35, via a flow-control valve 36, a solenoidactuated valve 37 and a pump 38, driven by an valve 37 is opened to sump, and a motor 22 is operated so as to drive a pump 21 which causes the flow of lubricant from the reservoir 17 into the lines 25 through check-valves 48. Indicator lights operate when re-charging is required and pressure gauges M are provided.