baber/WOPTO huggingface dataset:
Patent GB-785140-A (GB)
Title: Improvements in or relating to blasting methods and materials
Inventor: LAMBERT JAMES EDWARD
IPC: F42D1/10
Filed: 1955-07-27
Abstract: 785,140. Blasting; explosives. IMPERIAL CHEMICAL INDUSTRIES, Ltd. March 5, 1956 [July 27, 1955], No. 21671/55. Classes 9(1), 9(2) and 68(1) A method of forming ammonium nitrate blasting explosives in a substantially vertical borehole comprises introducing concurrently' and at a predetermined rate at least one stream of ammonium nitrate and at least one stream in solid form containing the other ingredients of the explosive composition so that the streams co-mingle during their descent in the borehole. Apparatus for carrying out the method comprises a tube 4, a set of fixed or rotatable baffles 5 so positioned that the materials will be deflected more than once, and at least two branch conduits 3, 3<SP>1</SP> at the top of the tube by which the component materials are delivered into the tube. One or all of the conduits contain means for conveying material through the conduit. The explosive composition comprises ammonium nitrate together with nitroglycerine and sawdust, or trinitrotoluene and ground anthracite, or sawdust and paraffin oil, or ground anthracite alone. The materials may be introduced into a tube of waterproof material that is sealed at the lower end and has been previously positioned in the borehole with or without a borehole liner between it and the borehole.
Patent GB-149331-A (GB)
Title: Telephone repeating circuit
IPC: H04B1/58
Filed: 1920-07-19
Abstract: 149,331. Western Electric Co., (Assignees of Clark, A. B.). July 31, 1919, [Convention date]. Repeating and amplifying systems.-A telephone repeater has a frequency filter connected in its output circuit, thus removing the necessity for balancing the filter impedances as to the two sides of the line, and also preventing " singing " of the repeater due to want of balance of the line at the higher frequencies, say above 2,200. As shown in. Fig. 1, the telephone line L is bridged by a resistance 2 connected by symmetrical tap connexions to the input transformer 3 of a valve 4. The output circuit of the valve comprises a filter F and transformer 10 having its secondary in the line L. The resistance 2 is connected to the line at symmetrical points on the secondaries of the transformer 10, and the sections of the line L on either side of the repeater are balanced for currents of voice frequency, thus preventing " sing- ing " at these frequencies. For the higher frequencies, " singing " is prevented by the filter F. which may also be arranged to prevent the passage of currents of lower frequency than those required for speech transmission. As the filter is not conductively connected to the line, its impedances need not be balanced; and the same filter impedances will serve for any line, because their values are dependent on the impedance of the remainder of the circuit, i.e. on the impedance of the output circuit of the valve. As this has a comparatively high value, the filter condensers need only be of small capacity. In the modification shown in Fig. 2, the line L is cut and both portions are balanced by networks N. The output circuit of each valve includes a filter F and is inductively connected to the opposite portion of the line. Specification 142,115 is referred to.
Patent GB-789242-A (GB)
Title: Improvements relating to the cutting of involute gears
Inventor: CROOK ALFRED WILLIAM
IPC: B23F5/22
Filed: 1955-07-27
Abstract: 789,242. Gear-cutting. ASSOCIATED ELECTRICAL INDUSTRIES, Ltd. July 16, 1956 [July 27, 1955], No. 21727/55. Class 83 (3). Apparatus for cutting involute helical gears comprises means 3 which rotates a blank 1 and is geared to a lead-screw 6, a cutter 8 on a carriage 7 having a split-nut engaging the screw, means for engaging and disengaging the nut, and indicating-means 10 to ensure correct engagement between the nut and the leadscrew. The carriage 7 carries a slide 9 on which is adjustably mounted a profiled cutter or a pair of flat-faced cutters 8 which operate on opposite sides of a tooth. In operation, with the work rotating continuously, the carriage 7 is traversed upwardly by engaging the split-nut when an indicator on the disc 10 driven by the screw co-incides with an indicator 11 fixed on the carriage. At the end of a stroke the cutters are retracted, the split-nut is disengaged, and the carriage 7 is returned by a rack-and-pinion or hydraulic ram. A second traverse is initiated when the indicator 10 is again in its zero-position. To ensure a predetermined cutting- schedule, and complete the cutting of a gear having 363 teeth in ten revolutions thereof, the indicator 10 may drive another indicator at onetenth its speed and the nut then be engaged when both indicators are zero. The indicators may operate electrical or hydraulic circuits to actuate the nut and the cutter-slides, the contacts between the indicators 10, 11 being slightly offset from their theoretical position to allow for the time-actuation of the nut.
Patent GB-857487-A (GB)
Title: Improvements in and relating to an indetectable mine exploding device
IPC: F42C15/33
Filed: 1959-06-25
Abstract: 857,487. Land mine fuzes. HOTCHKISSBRANDT. June 25, 1959 [June 27, 1958], No. 21815/59. Class 9(2). An indetectable device for exploding mines, using a striker and primer, is characterized in that it includes an evacuated container, the breakage of which causes a suction that draws the striker against the primer and thus provides the percussion energy. The device is made of non-metallic materials and comprises a body 1 closed in a fluid-tight manner by a cover 2. Internally the body comprises a boss 5, which forms a chamber 6 in the body connected by a cavity 7 to one end of a lower passage 8, in which a striker 14 is held in position by a sealing ring 15, and into the other end of which is screwed a primer carrier 20. Within the boss is a central cylindrical orifice 11, having a shoulder 13 at the lower end, on which rests a bridge with a central pointed portion, and, above the bridge, a pliable rubber collar 36 supporting an evacuated glass capsule 37. When the plate 2 is depressed it breaks at 2b and the central part 2a is thrust downwardly, so that a boss 38 causes the capsule 37 to be broken on the point 35, thereby causing the striker to be thrown against the primer 21. The primer ignites gunpowder 23 which, through a detonator 25, explodes a charge 26 and so fires a mine attached to the device by a fuze (not shown) inserted through a threaded plug 30 into an aperture 28 in the body 1. Up to three mines may be exploded by fuzes located in similar apertures around the device. When not in use, a threaded plug 31, extended by a rod 32, is inserted in the plug 30 and the primer carrier 20 is replaced by a threaded plug (not shown). In the modification in Fig. 5, the capsule has a portion 44 which breaks at an area of reduced strength 41 when an antenna 45 is pivoted, the antenna being mounted in a member 47, which also houses the portion 44 and is located in the body 1a of the device by a flexible connection 48. When not in use, a threaded cap 50 is used to hold parts 47, 48, 1a assembled, the antenna not being inserted. In another modification, Fig. 7, the striker is located by a plastic member 52 having tabs 53 whose ends are engaged in a recess 54 in the striker.
Patent GB-161886-A (GB)
Title: Improvements in chimney pots
IPC: F23L17/10
Filed: 1920-07-21
Abstract: 161,886. Hodgkins, A. July 21, 1920. Chimney-tops.-A wind-directed chimney-top comprises a centrally pivoted disc A bent upwardly in the manner shown and fitted on the upwardly bent portion with a vane e which, as shown in Fig. 1, is at an angle of 45‹ with the line of bend. The shaft c carrying the disc is mounted in a bearing carried in a frame q above the disc and thus clear of soot &c. The base B is twice the diameter of the top to which it is fixed. Proportions of other parts are specified.
Patent GB-1045768-A (GB)
Title: Apparatus using transistors
IPC: H01L25/03
Filed: 1964-05-27
Abstract: 1,045,768. Mounting transistors in circuit assemblies. E. HEY. May 19, 1965 [May 27, 1964], No. 21862/64. Headings H1K and H1R. A plate 11 is separated by spacers 10 from aluminium plate 4 to give a cooling duct. A power transistor 9, printed circuit-board 6 and potentiometer 7 are mounted on plate 4 in the wall 3 of a record-player cabinet.
Patent GB-354038-A (GB)
Title: Improvements in or relating to vehicle brakes
IPC: F16D65/46
Filed: 1930-07-21
Abstract: 354,038. Brake shoes acting on drums. BENDIX-PERROT BRAKES, Ltd. and CLARK, H., Westwood Road, Witton, Birmingham. July 21, 1930, No. 21932. [Class 103 (i).] A device for centralizing in the off position, the brake shoes of brakes of the type in which the shoes are permitted limited rotational movement with the drum so that one shoe applies the other, comprises a length of steel wire d, or other springy material bent to U form secured in a boss a which can be adjustably fixed in a slot in the anchor plate b. The limbs of the wire are bent over at f to engage on either side, the disc g of the turn-buckle c which connects the two shoes and by which they are adjusted. The limbs e of the spring pass through slots in projections k on a fixed plate l which form stops to limit the movement of the limbs towards each other. When the brake is applied, one or other of the limbs e is flexed away from its stop.
Patent GB-600818-A (GB)
Title: Methods of producing fissured networks in chromium electrodeposits
IPC: C25D5/48
Filed: 1944-11-08
Abstract: 600,818. Etching. UNITED CHROMIUM, Inc. Nov. 8, 1944, No. 21964. Convention date, Nov. 13, 1943. [Class 100(ii)] [Also in Group XXXVI] Chromium platings of a minimum thickness of one thousandth of an inch are electro-deposited under conditions predisposing the deposit to the formation of fissures (see Group XXXVI) and the fissures are subsequently developed by chemical etching alone or preceded by cathodic etching, the articles being removed before the deposit is stripped down to the base metal in the areas between the fissures. In an example for treating a deposit of 0.0072 inch thickness the etching bath contains sulphuric acid 138, chromic acid 5, trivalent chromium (added as potash chrome alum) 2 gms. per litre at 160‹F. The etching is carried out in two cycles each comprising cathodic treatment at 0.5 amps per sq. inch for one minute followed by treatment without current for one minute. In another example for treating a deposit of 0.0061 inch thickness the bath comprises 1 part HC1 (s.g. 1.13) to one part water at 140 ‹F. the treatment being for 10 minutes without current; 1 per cent Rodine and 1 per cent Triton B these being 'inhibitors of the nitrogen compound type, are added to reduce attack on any exposed cast iron. Specification 600,850 is referred to.
Patent GB-755070-A (GB)
Title: Improvements in or relating to work supporting mechanism for use in machine tools
IPC: B23Q1/28
Filed: 1954-07-28
Abstract: 755,070. Work-holders. SUNDSTRAND MACHINE TOOL CO. July 28, 1954 [Aug. 14, 1953], No. 22042/54. Class 83 (3). A machine-tool work-support comprises a work-supporting member 16 extending transversely from a housing 12 to work-engaging position, wedge means 24, 25 for locking the member to a bar 17 reciprocable longitudinally in the housing, and cam means 26, 27 to withdraw the member by endwise movement of the bar after unlocking of the bar and member. To withdraw the work-supporting plunger 16 from engagement with the work A, a cam or fluidpressure device 18 is actuated to turn a lever 19 and withdraw the bar 17. The wedging- surfaces 24, 25 on the bar and plunger are thus released and the surfaces 27, 26 on the bar and plunger then engage to withdraw the plunger against the force of a spring 22.
Patent GB-1035780-A (GB)
Title: Penicillins
Inventor: STOVE EDWARD RAYMOND
IPC: C07D499/60
Filed: 1964-05-28
Abstract: Penicillins have the general formula <FORM:1035780/C2/1> where R is a substituted or unsubstituted heterocyclic ring and X is an alkoxy group.  Preferably, R is a thienyl-substituted in the 5-position by halogen.  The heterocyclic ring may be substituted by one or more halogen atoms or C1 to C5 alkyl groups. The penicillins and their non-toxic salts are prepared by reacting 6-amino-penicillanic acid or a salt thereof with an acid of general formula <FORM:1035780/C2/2> wherein R and X have the above meanings. Specified are a -methoxy-a -2-thienylmethyl penicillin, a  - methoxy - a  - (5 - chloro - 2 - thienyl) methyl penicillin, a -methoxy-a -(3,5-dimethyl-4-isoxazolyl) methyl penicillin and a -methoxy-a -2 furymethyl penicillin.  The penicillins are resistant to destruction by acids and may be administered orally.  a  - Methoxy - a  - (5 - chloro - 2 - thienyl) - acetic acid is prepared by treating 5-chlorothiophene-2 aldehyde with bromoform, pottasium hydroxide and methanol, followed by acidification. a  - Methoxy - a  - (5 - bromo - 2 - thienyl) acetic acid is similarly prepared from 5-bromo-thiopene -2-aldehyde.  a  - Methoxy - a  - 2 - furylacetic acid is prepared by treating methyl a -2-furylglycollate with methyl iodide and silver oxide and hydrolysing the resultant product.  a  - Methoxy - a  - (3,5 - dimethyl - 4 - isoxazolyl) acetic acid is prepared by treating 4-formyl-3,5-dimethylisoxazole with bromoform and methanolic KOH followed by acidification.
Patent GB-1012841-A (GB)
Title: Signal combining circuit
IPC: H04R3/12
Filed: 1964-05-29
Abstract: 1,012,841. Signal combining circuits; audio transducers; local circuits &c. STANDARD TELEPHONES & CABLES Ltd. May 29, 1964 [June 1, 1963], No. 22303/64. Headings H3U and H4J. In a signal combining circuit, comprising e.g. three signal sources and three outputs connected so that first and second signals are applied to the first output, all three signals appear at the second output, and second and third signals appear at the third output, the distribution of the signals is effected through a resistance network comprising two lattice networks having a common series resistance; crosstalk attenuation is achieved by using small internal resistance signal sources which give rise to the necessary voltage division. The invention is described in relation to an aircraft intercom system having inputs from two radio sets and an internal speech amplification system. Thus a system is provided in which it is possible at each of the three listening stations to listen to both radios separately or simultaneously, and to do each in combination with receipt of voice intercom. Circuit.-Signal sources 1, 2, 3 supply signals A, B, C respectively to the output stages 4, 5, 6. The resistances of the output stages are made as high as possible. The system may be expanded indefinitely by adding further lattice networks, and can be used in both transistor and tube type circuits.
Patent GB-466739-A (GB)
Title: Improvements in pistons
IPC: F02F3/04
Filed: 1936-08-13
Abstract: 466,739. Pistons. DIETRICH, F. R. Aug. 13, 1936, No. 22322. [Class 122 (i)] The split skirt of a light metal piston is provided with ring inserts 9 of cast iron &c. One insert may be enlarged to encircle the bosses or two inserts may be connected by parts 14 encircling the bosses. The inserts may be embedded in ribs 7 or may be exposed at the surface of the skirt. The head and skirt may be connected by webs 4 or by ribs extending from the piston crown to the bosses clear of the circumferential wall of the head. Reference has been directed by the Comptroller to British Specifications 158,325, 175,954, 312,055, [all in Class 122 (i)], 407,478, and 408,208, and U.S.A. Specifications 1,825,750, 1,842,745, 1,891,914, and 1,985,699.
Patent GB-1004970-A (GB)
Title: Improvements in or relating to building elements for the construction of floors, walls or the like
IPC: E04C2/32
Filed: 1962-06-08
Abstract: 1,004,970. Composite sheet; lattice elements. J. LINECKER. June 8, 1962 [June 17, 1961], No. 22345/62. Heading E1K. [Also in Division B3] A method of manufacturing a structural element such as a wall or floor from a sheet of wave-shaped cross-section comprises further deforming the sheet at spaced apart intervals so as to form depressions on the wave crests and elevations in the wave troughs so that fold lines are formed across the sheet, and then bending the sheet at these lines to form a zig-zag. A sheet 1, which may be aluminium alloy, having an arcuate wave form cross-section has a series of fold lines 6 extending perpendicular to the wave troughs 3 and crests 2, and, when zig-zagged, is adhesively secured to a pair of similarly waved and transversely indented sheets 7. The indentation angle is so chosen in relation to the zig-zag angle that face to face abutments result to give a maximum contact area to the joints. In a second embodiment, the cross-section of the sheet remains the same, but in plan view each portion of the sheet between any two transverse fold lines is in the form of a series of semi-cones placed with alternate bases and apices along any fold lines. In a further modification (Fig. 10, not shown), the web is bent in meander instead of zig-zag shape, so as to form in side view a series of intermeshed triangles alternately open upwards and downwards.
Patent GB-464248-A (GB)
Title: Improvements in or relating to means for affording protection within living spaces against poisonous gases in the external atmosphere
IPC: A62B13/00
Filed: 1936-08-13
Abstract: 464,248. Bellows. RUSSELL, F. J. Aug. 13, 1936, No. 22361. [Class 8 (i)] [Also in Group X] A manually operated positive action pump is employed in an enclosure to draw air from a layer of the external atmosphere above the layer vitiated by poison gas, and to use this air to create a pressure in the enclosure above that of the outer air, the ingress of which is prevented. An air inlet pipe 15, which extends outside the building or enclosure, and upwardly into a layer of pure air, has valved outlets 11, 13 entering through the ends 4, 5 of a double-acting bellows 1, 2. A partition 3 is reciprocated between the ends of a handle 7 and side members 8, which are fixed to the partition 3. Valved outlets 12, 14 are provided, all valves being of the non-return variety. In Fig. 5, the valves are arranged in the fixed partition 3, and the bellows enclosed in a rigid tubular housing 25 which is moved to- and-fro on rollers 27 by a handle 28. In a modification, the bellows is dispensed with, and a reciprocating piston in a cylinder is used.
Patent GB-793779-A (GB)
Title: Improvements in and relating to means for checking the electrolyte of storage batteries
Inventor: SCOTT JAMES STEVENSON
IPC: H01M50/618
Filed: 1954-07-30
Abstract: 793,779. Storage batteries. COAL INDUSTRY (PATENTS), Ltd. Oct. 24,1955 [July 30, 1954], No. 22368/54. Class 53. An apparatus for checking, and, if necessary, changing, the electrolyte of a storage battery, comprises nozzles 34, for connection to the cells of the battery, which are joined by conduits 32 to electrolyte inspection chambers 24, the nozzles 34 and the battery being mounted on a plate 36 which forms part of a framework 51 pivoted so that the battery can be inverted to drain the electrolyte into the inspection chambers. To check the electrolyte of a threecell miner's lamp battery, the battery with its lid and stoppers removed is placed in a battery carrier 46 and the battery is raised by a locking handle 49 so that the nozzles 34, which are spring-loaded, enter the filling necks of the battery cells. The framework 51 is then swung through 180 degrees (to the position shown in chain lines) and air enters the cells, through valves 42 at the heads of pipes 40 connected to the nozzles, so that the electrolyte drains through the conduits 32 into the indicating chambers 24 where its condition is determined visually and by hydrometers 25. The amount of electrolyte can be seen from datum marks on the chambers. If the electrolyte from any cell is unfit for further use, a push-button valve 29 in a drain pipe 28 from the appropriate chamber 24 is opened and an air bulb 41 at the head of the appropriate pipe 40 is squeezed to force all the electrolyte from the cell, the valve 42 in the line 40 then acting as a non-return valve. The electrolyte in the chambers 24 can be " toppedup " or, if the electrolyte has been drained, the empty chamber can be filled from tanks 13, containing water or electrolyte, via pipes 18 mounted on a sliding plate 19. When each chamber contains the correct amount of electrolyte at the required specific gravity, the frame 51 is swung over to return the battery to the lower position and refill the cells with electrolyte after which the battery is removed. The apparatus can also be used to test for leakage of the cell casings by looking the filled battery against the nozzles 34, closing the valves 33 in the lines 32 and putting the cells under pressure by squeezing the bulbs 41.
Patent GB-1333670-A (GB)
Title: Coating proces
IPC: C08K3/34
Filed: 1971-04-19
Abstract: 1333670 Coating method EI DU PONT DE NEMOURS & CO 19 April 1971 [24 Feb 1970] 22452/71 Heading B2E A coated fibrous substrate is obtained by applying a coating composition containing a water-soluble polyvinyl alcohol which has a degree of hydrolysis of at least 99% and a 4% aqueous solution viscosity at 20‹C. of 7.5-30 centipoises to the surface of the fibrous substrate and drying under conditions such that the instantaneous drying rate at constant evaporation is at least 5 lbs. of water/hour ft<SP>2</SP>. The coating compositions preferably contain a filler such as a clay. The clay may be a wet aluminium silicate of the kaolin group or hydrated silica clay. The pigment, e.g. calcium sulphate, titanium dioxide, blanc fixe, lithophone, zinc sulphide and zinc oxide may be present in amount up to 50% by weight of the clay. 0.10 to 0.50% by weight of dispersing or stabilising agents such as tetrasodium pyrophosphate may be present. The substrate may be paper or paper board. The drying may be effected using high velocity hot air impingement, a high frequency dielectric field, a steam dryer or by direct contact with a or gas flame using a ribbon burner.
Patent GB-1302487-A (GB)
IPC: G01M1/28
Filed: 1971-04-19
Abstract: 1302487 Measuring wheel imbalance electrically APPLIED POWER INDUSTRIES Inc 19 April 1971 [25 Feb 1970] 22460/71 Heading G1N The unbalance of a wheel is determined in situ on a vehicle by rotating the jacked-up wheel and measuring the vertical and horizontal vibrations using an accelerometer, the corresponding electrical signals being fed to a meter, to determine the magnitude, and to a stroboscope lamp, to determine the angular position of the unbalance. The accelerometer 10, Fig.1 incorporating a first element for measuring vibration of the wheel W in the vertical direction, i.e. "static" unbalance, and a second element for measuring vibration in the horizontal direction, i.e. "dynamic" unbalance, is magnetically attached to a convenient non-rotating part, e.g. the wheel spindle backing plate B. The sensing elements constitute variable resistors which are connected in bridge circuits to produce outputs representing the static and dynamic vibrations, selectable by a switch 45, Fig.6. The unbalance signals are fed through an amplifier and rectifier to meter M, giving the unbalance amplitude, and also via a phase shifter 50 and shaper 51 to a synchronous pulse generator 52 whose output is connected to an integrator 53 and meter M, to indicate speed, and also to circuit elements 60-64 which utilize the pulses to light a stroboscopic lamp L when the unbalance mass is at bottom dead centre, preferably passing the signals through a speed discriminator 55 which is open at the nominal resonant wheel speed, for which the phase shifter 50 provides a 90 degrees phase shift. The wheel is first tested for static unbalance and equal compensating weights are added on the outside and inside of the wheel. Switch 45 is then operated to dynamic unbalance and compensation is effected by adjusting the proportion of static compensating weights located on the two sides of the wheel.