baber/WOPTO huggingface dataset:
Patent GB-292218-A (GB)
Title: Improvements in or relating to thermionic valves for transmitting and receiving wireless signals and for other purposes
IPC: H01J21/20
Filed: 1927-03-11
Abstract: 292,218. Midgley, A. H. March 11, 1927. Vacuum tubes.-A valve has a central anode surrounded in turn by a grid, a cathode, and a second grid and anode. The spacing and size of the electrodes are preferably such that the first grid and central anode have a greater effect on the electron stream passing to the central anode than that of the second grid and anode. The valve may be used as a detector, amplifier, or as an oscillation generator as described in Specification 289,999, [Class 40 (v), Wireless signalling &c.]. As shown in Fig. 1, the receiving input circuit is connected between the grid G<1> and cathode, and the central anode A<1>, in the form of a. rod or cylinder, is joined through a resistance R with the positive terminal of the high tension battery, which is also connected through a telephone receiver T with the outer anode A<2>. A blocking condenser C<2> connects the anode A<1> and grid G<2>. The cathode may consist of one or more straight filaments in series or parallel, or of a straight or zig-zag filament wound to form a cylinder of circular or oval section. The central anode may be in the form of a plate and the other electrodes of oval section, or the inner anode and grid may be of circular section, and the other electrodes of oval section. The inner anode and grid mav be shorter than the other electrodes. In order to provide another stage of amplification two further grids with an interposed cathode and surrounded by a third anode, may be mounted around the second anode. In the receiving circuit shown in Fig. 3, the valve has a central anode A<1>, a grid G<1>, a cathode K, and two outer grids G<2>, G', and anodes A<2>, A<3>. The aerial is connected through an inductance I<1> and condenser C' between the grid G<2> and cathode K, which is earthed. The anodes A', A<2> are connected through resistances with the high tension batterv, and the anode A<2> is connected through an inductance I<2> and condenser C<3> to earth, the inductances being coupled. A blocking condenser C<2> connects the anode A<2> and grid G<1>. Specifications 267,198 and 280,981 also are referred to.
Patent GB-131084-A (GB)
Title: Improvements in connection with the Manufacture, or Production of Acetaldehyde.
Filed: 1918-04-25
Abstract: 131,084. Crosfield & Sons, J., and Hilditch, T. P. April 25, 1918. Acetaldehyde.-In the production of acetalclehyde by passing acetylene into acid solutions of mercuric salts, the mercury sludge formed in the process is revivefied by adding to the reaction liquid a small quantity of manganese dioxide, lead dioxide, red lead oxide, or cerium dioxide, and agitating the mixture by passage of gas or by mechanical agitation; the revivefication is repeated until the solution ceases to be an effective absorbent. The reaction liquid should contain 0.5 to 1.5 per cent of mercuric oxide, and the apparatus should be free from metallic parts; the lower portion of the apparatus should contain baffles to break up the gas current. An example is given of the use of manganese dioxide.
Patent GB-372721-A (GB)
Title: Method of grinding bore holes
IPC: B24B5/06
Filed: 1932-03-09
Abstract: 372,721. Enlarging holes by grinding. ROSAK, K., 6, Wullenweberstrasse, Berlin. March 9, 1932, No. 7060. Convention date, March 19, 1931. Drawings to Specification. [Class 60.] In grinding bore-holes the rotational speed of the grinding-wheel is increased in proportion as the grinding-wheel advances through the bore thus avoiding deflection of the grinding spindle and consequent tapering of the bore.
Patent GB-967290-A (GB)
Title: Apparatus for producing and packaging glass strand
IPC: D02G3/18
Filed: 1963-02-22
Abstract: <PICT:0967290/C1/1> Glass fibres 16 from a molten glass container 12 are gathered into a strand 20 and the strand 20 wound on a former 26 which is mounted on a collet 28 driven by a high slip induction motor 30, the motor 30 preferably being one which has constant horse power characteristics. The winding means 26, 28, 30 provide an attenuating force on the fibres 16 which, owing to the motor characteristics, remains constant throughout the process in spite of increasing package diameter.  This increase which would tend to increase the linear winding speed and hence also the attenuating action, is compensated for by reduction in the rotational speed of the winding means 26, 28, 30, and yardage variations of the fibres are thereby reduced and a package is produced of uniform strand tension throughout.  Conventional traverse means 24 may be employed and the motor 30 and winding means 26, 28 may be reciprocated with variable stroke to form a package of the desired shape.  The temperature of the molten glass is preferably held constant in the container 12 and size is applied to the fibres 16 by means of an applicator 18.
Patent GB-803853-A (GB)
Title: Improvements in or relating to ships' propellers
IPC: B64C11/20
Filed: 1957-03-05
Abstract: 803,853. Ship's propellers. ANDERSEN, B. G. March 5, 1957 [March 6, 1956], No. 7214/57. Class 114 A ship's propeller is coated with a layer consisting of fibre glass, &c., in an organic plastic material. The coating may be applied as a foil or a paste and the plastic material be selected from polyester, polyethylene, vinyl resins including polyvinyl-chloride, phenol resins and styrol and polyamide resins including nylon.
Patent GB-212120-A (GB)
Title: An improved preparation or composition for cleaning suede or other leathers having a rough or semi-finished surface
IPC: C11D9/24
Filed: 1923-03-13
Abstract: Cleansing-compositions for suede or other leather having a rough surface consist of such proportions of soap, a cleaning solvent a dye or pigment or both, with or without a filling material, that the product is solid or semi-solid and when rubbed upon the leather deposits thereon a thin film which is practically a liquid. Methylated spirit, carbontetrachloride, and paraffin oil are specified as suitable solvents, and fat, fatty oils, or waxes as bases for the soap.  In an example 4 lb. of stearic acid, 0.58 lb. of caustic soda, 1 lb. of water, 94.42 lb. of methylated spirit, and 0.7-0.1 lb. of spirit dark blue, green, or nigrosine dye are used.
Patent GB-954834-A (GB)
Title: Improved polymers
IPC: C08F214/22
Filed: 1960-03-01
Abstract: Cross-linkable copolymers having a molecular weight between 2,000 and 10,000 and which are liquid at 60 DEG C. or below are obtained by polymerising 15 to 50 mol per cent of hexafluoropropene with 50 to 85 mol per cent of vinylidene fluoride and an alpha-beta unsaturated carboxylic acid at a temperature between 50 and 200 DEG C. in the presence of a free-radical polymerisation promoter and an acylic mercaptan or non-polymerisable halo-hydrocarbon chain transfer agent. Specified acids are acrylic, methacrylic and crotonic.  The polymerization system may be aqueous or non-aqueous and may be operated in a continuous or batchwise manner. Specified promoters are cumene, diisopropyl benzene and t-butyl hydroperoxides; benzoyl, chloroacetyl, barium and zinc peroxides; and metal and ammonium persulphates, perphosphates and perborates. Emulsifiers such as perfluorooctanoic acid, sodium oleate and potassium palmitate and stearate may be used in aqueous systems. Cross-linking may be effected at up to 150 DEG C.; several examples are given of amine, peroxide and dithiol cross-linking agents and basic metal oxide accelerators therefore. Cross-linking may be effected in situ e.g. to line an aluminium tank. Reference is made to Specification 954,835 which is divided out of the present invention and relates to similar copolymers containing only the two fluoromonomers as essential components and prepared by polymerization at 100 to 200 DEG C.
Patent GB-1195391-A (GB)
Title: Improvements in Joints for Electric Cables
Inventor: GOSLING CYRIL HENRY
IPC: H02G15/24
Filed: 1967-02-15
Abstract: 1,195,391. Cable joints. BRITISH INSULATED CALLENDER'S CABLES Ltd. 14 Feb., 1968 [15 Feb., 1967], No. 7323/67. Heading H2E. In a joint for metal sheathed fluid-impregnated cables comprising a fluid-tight enclosure having three parts 12, 4, 10, the central part 4 being joined by insulating rings 5, 9 to end parts 12, 10 which are sealed to cables 1, 2 as described in Specification 1,059,270, instead of separate supplementary enclosures at each end of the joint as in the above Specification, a single enclosure 13 of resin-bonded glass fibre is provided; or no supplementary enclosure may be used. As shown, the enclosure 13 is sealed to cable lengths 1, 2 by epoxy resin putty protected by layers 16 of polyethylene and P.V.C. tape, and is provided with glands (not shown) for inlet and outlet pipes, e.g. 20, of a water jacket 3. The centre part 22 of the enclosure 13 is spaced from the jacket 3 by P.V.C. tape 23, is reinforced at 25 and is supported by concrete blocks 24. When, e.g. in a tunnel, a joint with no supplementary enclosure is used (Fig. 2, not shown), guards of expanded metal (31, 32) may be provided for the ends of the joint.
Patent GB-126138-A (GB)
Title: Improvements in or relating to Dusters, Polishers and the like.
Inventor: SIDEBOTTOM HENRY
IPC: A47L13/38
Filed: 1918-05-03
Abstract: 126,138. Sidebottom, H. May 3, 1918. Pads and like rubbing and polishing appliances. -A duster, polisher, or the like comprises one or more pieces of felt arranged or assembled to form a pocket into which is inserted a blade provided with a handle portion. The appliance as shown in Fig. 1 comprises two pieces a of thick felt covered along one edge by a strip b of leather, canvas, &c. secured by stitching c and rivets d so as to form a longitudinal pocket in which the flat blade of the handle e is secured. In a modification, the appliance is made from a single piece of folded felt. The felt may be stiffened at the edges by stitching f. In another modification, suitable for use as a crumb scoop, the folded parts are secured together by stitching and the handle formed from stout wire, the blade portion being curved.
Patent GB-1495264-A (GB)
Title: Amplifier arrangements
IPC: H03F1/32
Filed: 1975-02-19
Abstract: 1495264 Amplifiers PLESSEY CO Ltd 19 Feb 1975 [19 Feb 1974] 7458/74 Heading H3W An amplifier arranged to give low distortion, comprises a first amplifier A 1  having a feedforward path which includes a second amplifier A 2 , the second amplifier being provided with a predistorted input signal from the first amplifier, whereby distortion introduced by the second amplifier compensates for the distortion produced by the first amplifier. The two amplifiers may operate at substantially the same power levels. An input signal BV in , is applied to a delay line D 1 , a 1/B coupler C 1  providing a parallel input V in  to amplifier A 1 , the output voltage of which is where V d  represents the distortion produced by A 1 . A second I /B coupler C 0  provides the predistorted signal for amplifier A 2 , which is combined with BV in  in a comparator C, which may be a 3 dB hybrid transformer coupler. With switches S 1 , S 2  in the "Y" position, the resulting output of A 2  is which is combined with the output of A 1  in a recombiner R to produce an output free from the distortion V d . R may be a 12 dB directional coupler, and C 1  and C 0  may be 20 dB directional couplers. The delay lines D 1 , D 2  compensate respectively for the differences of time delay T 3 , T 5  over the parallel paths from C, to C and from C 0  to R; D 1  D 2  may be lengths of cable. The switches S 1 , S2 in the "X" position provide a feed-forward only configuration in which A 2  is fed with distortion voltage only, and produces - V d . The "X" position may be used for setting up. The distortion voltages produced by A 1  and A 2  need not be equal; in the example given they differ by 3 dB but attenuators R 2 -R 5  are set to compensate for this difference.
Patent GB-1328603-A (GB)
Title: Apparatus for the remote detection of conducting bodies
IPC: G01V3/10
Filed: 1972-02-17
Abstract: 1328603 Geophysical surveying SELCO MINING CORP Ltd 17 Feb 1972 [22 Feb 1971] 7480/72 Heading G1N In a geophysical surveying apparatus in which a primary e. m. waveform exhibiting abrupt discontinuities is radiated the secondary signals radiated from the ground together with any transient components due to a conducting ore are sampled so that only the transient components are applied to a signal averager providing a number of channels. The transmitter 2 under the control of pulse generator 1 provides a primary field P and the secondary field of the form shown at A received in inductive receiver 3 after amplification is applied to gating circuits 7 and 8 which are gated by pulses D and E so that only the alternate polarity transient components F, G are gated to differential amplifier 9. The repetitive waveform H formed at the output of amplifier 9 is after further amplification applied to signal averager 11. The averager 11 in accordance with trigger pulses T from the pulse generator 1 scans the repetitive waveform and samples sequential portions of each cycle  and stores them in respective memory locations. The memory locations are strapped together in groups to provide six output channels the outputs from which represent the time average values of the respective portions, Fig. 3 (not shown). F.E.T. 18 normally clamps the signal averager input terminal to ground but during the quiescent period between the primary field pulses is switched off by trigger pulses J from the signal averager. The signal averager may include a plurality of capacitors serially connected to respective F.E.T.'s which are sequentially triggered by a ring counter Fig. 4 (not shown). The receiving apparatus may include three mutually perpendicular coils 3 each being connected to a respective receiving circuit and averager.
Patent GB-1179278-A (GB)
Title: Method and Apparatus for Dry Sorting the Constituents of a Homogenous Mixture.
IPC: B03B4/06
Filed: 1967-02-16
Abstract: 1,179,278. Sorting granular materials. C. E. HOING. 16 Feb., 1967 [1 March, 1966], No. 7507/67. Heading B2H. A mixture of solid particles is sorted into particles of different specific weights by causing the mixture to flow under the action of gravity on a porous sloping surface through which a gas is blown to fluidize the stream of particles thereby stratifying the latter into layers of particles of downwardly increasing specific weights, and then causing the stratified stream to slide over a perforated sloping surface through which the stratified particles drop in succession in accordance with their decreasing specific weights. In the arrangement shown in Figs. 1 and 2, the mixture 14 is first fed into an adjustably inclined channel 1 having a porous bottom 2 through which air is blown from a box 3. The porous bottom 2 may be made of an upper layer of canvas or nylon carried by a metal gauze and of a lower sheet of felt. The stratified stream then passes down a further adjustably inclined channel 6 the bottom of which is. constituted by a graduated slotted or perforated grid 7 which provides a longitudinal classification, underneath the channels, of the layers of decreasing weight which are vertically distributed in the stream of particles leaving the channel 1. Flaps 8 are adjustably located lengthwise under the grid 7 so as to allow constituents 15 of different specific gravities to drop into separate containers 9. The width of the channel 1 may be uniformly reduced by means of a movable flange (5), Fig. 3 (not shown), engaging each side of the channel. The width of the stream of particles over the grid 7 may be progressively reduced from the input end to the output end by blades (10), Fig. 3 (not shown), laid perpendicular on the grid to assume the shape of a V. The speed of flow of the upper layer of the stream in the channel 1 may be increased by closing the channel completely or partly by a plate 12, Fig. 4, so that the air blown through the channel bottom is made to sweep at a higher speed along the upper surface layer of the particles. The speed of the air may be increased by a vertically shifting arrangement of the (plate 12 which may be parallel or inclined to the channel bottom, or by feeding additional air from a pipe 13. Alternatively, the flow of air may be reduced by providing a portion of the plate 12 with perforations. A number of arrangements may be connected in series each comprising a channel having a porous bottom and a channel having a grid-type bottom.
Patent GB-584189-A (GB)
Title: Hand-grip for forks, spades, shovels and similar implements
IPC: A01B1/00
Filed: 1944-04-24
Abstract: 584,189. Gardening - tool handles. EVANS, W. H. April 24, 1944, No. 7536. [Class 6 (ii)] [Also in Group XXIII] A supplementary handle 3 for a spade or the like projects forwardly of the main handle 2. It is supported by a triangular frame consisting of pairs of strips 4, 5 bent around the usual spade socket and handle, or pivoted to lugs bolted thereto.
Patent GB-418485-A (GB)
Title: Improvements in soles for footwear
IPC: A43B7/06
Filed: 1934-03-09
Abstract: 418,485. Ventilating boots &c. MAVAUT, O., Boucoiran, Gard, France. March 9, 1934, No. 7542. Convention date, March 11, 1933. Addition to 375,846. [Class 17 (ii).] A plugging member B made, for example, of rubber, is inserted in a depression or cavity A within a large hollow 4 formed in the thickness of the sole proper 2. Holes C, C in the member B may be coincident or not with the ventilating air holes 3 in the sole. A piece of metallic gauze or woven fabric may be placed in the cavity A beneath the member B. A closing member 11 provided with channels 7 which communicate with the interior of the shoe through opening 7<a> in the thickness of the member 11 and with the outside through holes C, C and 3, is inserted in the cavity 4. British Specifications 375,895, 394,349, and Belgian Specification 389,793 are referred to.
Patent GB-818949-A (GB)
Title: Spherical plug valve
Inventor: CLADE ROBERT
IPC: F16K5/06
Filed: 1956-03-12
Abstract: 818,949. Valves. ACF INDUSTRIES Inc. March 12, 1956, No. 7618/56. Class 135. A rotary spherical plug valve comprises a body A, Fig. 3, housing a spherical plug B rotatable by a stem D to bring a passage 40 through the plug into and out of register with passages 38 formed in members C secured to the body and internally threaded to receive pipe ends. The inner end face of each member C is formed with a V-shaped annular groove mounting sealing and seating rings 46, 48 respectively retained in position by a clamping ring 50. The rings 46, 48 are made of chemically inert material such as of polytetrafluoroethylene which has a coefficient of expansion several times that of iron and other metals and it is stated flows under heavy pressure less rapidly with decreasing temperature than with increasing temperature. To overcome this latter characteristic the clamping rings are formed with a recess 54, Fig. 5, providing an edge 52 pressing against the seating ring 48 to deform the latter, as shown chain-dotted. The clamping ring 50 may be replaced by a spring steel ring 60, Fig. 6, which is itself resilient. The stem D is provided with a combined indicator and stop-plate 22 having a downwardly directed lug 28 engageable with stops 30, 32 on the body A.
Patent GB-378352-A (GB)
Title: Paint conditioning machines
IPC: B01F15/00
Filed: 1932-03-15
Abstract: 378,352. M i x i n g - a p p a r a t u s. GLIDDEN CO., 11001, Madison Avenue, Cleveland, Ohio, U.S.A. March 15, 1932, No. 7644. Convention date, March 16, 1931. [Class 86.] An apparatus for mixing the contents of paint &c. cans comprises a shaft which is given an oscillating movement by means of crank mechanism and is provided with means for detachably securing the cans. The crank shaft 20, driven by a pulley 22, is mounted in bearings in a casing 5 in which is also mounted the rocking shaft 23. Splined to the ends of the latter are two plates 32 with bevelled edges 33 to which the can-holding devices are secured. The latter comprise grooved members 46 engaging the plates 32 and provided with cylindrical members 35 with hinged doors 36 and upper and lower end plates ; the upper plate has a screw clamp 43 engaging the top of the paint container.
Patent GB-609374-A (GB)
Title: Improvements in or relating to electric time alarms
IPC: G04C23/02
Filed: 1946-03-12
Abstract: 609,374. Time-alarm signals. OLIVER, M. M. March 12, 1946, No. 7726. [Class 118 (ii)] In an electric time-alarm of the kind comprising a clock having contacts assigned to the hour and minute positions co-operating with master contacts associated with the hour and minute hand respectively and a plug-andsocket switchboard connected to said first contacts, a source of electrical supply is connected between the master contacts, and the switchboard plugs are permanently connected only to an electric alarm device. The minutes spindle 2 of a clock has mounted thereon four cams 17, offset so that four associated pairs of contacts 16, 18 are consecutively closed at fifteen-minute intervals. Twelve spring contacts 13 are consecutively wiped by pins 12 arranged in a helical path on a metal drum 11 connected to a brush 20 and mounted to rotate at the same speed as the hour hand. A battery 23 is connected between brush 20 and contact strip 18 which the contacts 13, 16 are individually connected to sockets 25, 26 respect-. ively. A bell, buzzer or other electric alarm device 27 will thus be operated at a selected quarter-hour when it is plugged into the appropriate hour-and-minute sockets 25, 26. Any number of switchboards 24 may be multipled to contacts of the same clock or a number of alarm devices 27 may have their leads taken to one switchboard, the plug sockets 25, 26 being sufficiently duplicated to allow enough connections to be made. In a modification (Figs. 6 and 7, not shown) the contacts 13 and drum 11 are replaced by a metallic ring and twelve segments, a contact on the hour hand bridging the ring and one segment each hour. The minute hand similarly bridges pairs of contacts at each quarter hour.
Patent GB-598478-A (GB)
Title: Improvements relating to optical projectors
IPC: G03B21/00
Filed: 1945-03-27
Abstract: 598,478. Optical-projection apparatus. PULLIN OPTICAL CO., Ltd., and BAIGENT, E. W. March 27, 1945, No. 7728. [Class 97 (i)] An optical projection apparatus has a tubular spigot supported by and projecting forwardly from the lamphouse and arranged to support a film or slide carrier, the spigot being capable of small rotational adjustments. The film or slide carrier may be rotated round the spigot in steps of 90 degrees. In the form shown, a tubular spigot 6 is secured in a hole in the front wall of the projector housing by a knurled ring 11. It carries a pin 14 which enters a member 13 capable of small tangential adjusting movements produced by a screw entering from the side wall of the casing. The sleeve 8 can rotate on this spigot and has a latch 24 for engaging recesses, in the spigot, spaced 90 degrees apart. Diametrically opposite lugs 30 on the sleeve 8 engage lugs 32 on the mounting for the slide carrier 31, which is secured by pins 34 with knurled heads 35. By withdrawing either pin the carrier can hinge on the other. The carrier can be exchanged for another by withdrawing both pins. Small pins are provided in the upper lugs 32, engaging slots in the pins 34, to prevent their complete removal. The slide-carrier mounting carries the projection lens at its forward end. The upper part 1 of the projector housing is hinged at 3 and secured by a screw 5. The film carrier may be of the kind described in Specification 588,932, modified by the addition of lugs 32. Specification 598,483 also is referred to.