baber/WOPTO huggingface dataset:
Patent GB-1269968-A (GB)
Title: Improvements in or relating to microphone pre-amplifiers
IPC: H04M1/60
Filed: 1969-09-23
Abstract: 1,269,968. Substation circuit amplifiers. SIEMENS A.G. 23 Sept., 1969 [24 Sept., 1968], No. 46698/69. Heading H4K. A microphone preamplifier, suited to production as an integrated circuit and having a common pair of terminals 3, 4, for supply and output, has a first stage comprised by the differential amplifier T1, T2, with negative feedback from resistor R7, a final stage comprised of transistors T3, T4, operating as a controlled voltage source. The D.C. supply potentials for transistors T1, T2, are taken from diodes D1, D2, D3 across the line, positive feedback being introduced by resistor R4 in conjunction with D1 in order to compensate supply voltage variations, the dynamic impedance of the diodes increasing as the voltage falls. The circuit is designed to give operating potentials for T1, T2, equal to multiples of the forward threshold of a diode. Thus the voltage at B is three times, that at A and terminals 1 and 2 twice, and that at K is equal to, the forward threshold. The microphone W is of the piezo-ceramic, magnetic or dynamic type.
Patent GB-1526797-A (GB)
Title: Coupling systems for ultrasonic waves
IPC: A61B8/14
Filed: 1975-11-13
Abstract: 1526797 Ultrasonic couplings SRI INTERNATIONAL 13 Nov 1975 [21 July 1975] 46904/75 Heading H4J Ultrasonic waves are coupled between a solid container 14 (i.e. an ultrasonic camera), and a specimen via a liquid-filled bellows system 20, 22 comprising a (PFTE) diaphragm 18 stretched over a (neoprene) toroid 22 and secured (by rings 50,52) to one wall 24 of a (vehicle tyre) toroid 28 whose other wall 26 is secured 32, 34 to the end 30 of the housing 14. A steel ring 58 prevents the tyre collapsing under the weight of liquid which is at below-ambient pressure and is introduced and vented via tubes 60, 62. A further membrane 68 may be provided.
Patent GB-1108060-A (GB)
Title: Indole derivatives and a process for their production
Inventor: HOFMANN ALBERT
IPC: C07D209/08
Filed: 1965-04-01
Abstract: Compounds of the general formula <FORM:1108060/C2/1> (wherein R1 represents a hydrogen atom and R2 represents a hydrogen atom or methyl group or R1 + R2 represents a single bond, and R3 represents a hydrogen atom or benzyl group) are prepared by reacting 5-chloroacetylindole with an amine of the formula <FORM:1108060/C2/2>
Patent GB-1320556-A (GB)
Title: Apparatus for changing the work rolls in roll stands
IPC: B21B31/10
Filed: 1970-10-05
Abstract: 1320556 Rolling mills MASCHINEN-UND WERKZEUGBAU GmbH 5 Oct 1970 [18 Oct 1969] 47177/70 Heading B3M Roll changing apparatus for a strip rolling mill comprises an hydraulic connector which ensures that a new set of rolls are automatically coupled to an hydraulic supply when the rolls are inserted in the mill. The rolls 4 are supported on a cradle 6 and are shown in Fig. 1 as being ready to be inserted, together with the cradle, into the mill 1 by a displacer 5. The connector 11, Fig. 2, engages with a similar connector on the mill when the rolls are moved into position, thus connecting the hydraulic supply to rollbalancing cylinders 14, via passages 10 and 13 in the cradle 6. The rolls are therefore automatically urged apart when they are moved into position. A carriage 2, which is movable in the rolling direction, facilitates removal of one set of rolls from the mill and insertion of a replacement set.
Patent GB-1162689-A (GB)
Title: A process for Bonding together Sheets using a Copolymer Material
IPC: C09J123/08
Filed: 1966-10-21
Abstract: 1,162,689. Laminated fabrics. FARBENFABRIKEN BAYER A.G. 21 Oct., 1966 [21 Oct., 1965], No. 47337/66. Heading B5N. A process for bonding together textile sheets, e.g. woven or knitted fabrics, felts or fleeces of cotton, rayon, polyacrylonitrile, polyamide or polyester fibres comprises using as bonding agent a copolymer of ethylene with 1 to 35% by weight of at least one α: #-unsaturated carboxylic acid having from 3 to 5 carbon atoms, the copolymer being in the form of a powder or in the form of filaments, a fleece or a fabric. If a fleece is used, it may contain other fibres or a binder. Bonding is preferably effected by sintering the copolymer on one textile sheet and applying the second textile sheet thereto under heat and pressure.
Patent GB-1329890-A (GB)
Title: Telecommunications systems
IPC: H04B3/20
Filed: 1971-10-12
Abstract: 1329890 Echo suppressors SIEMENS AG 12 Oct 1971 [3 Nov 1970] 47365/71 Heading H4R In an echo suppressor with a break-in facility in which the outgoing path S-SL is interrupted at 12 on detection at 7, 9, of a signal in the incoming path and break-in is effected by inhibiting gate 11 when the signal in the outgoing path exceeds a predetermined relation with the signal in the incoming path, the comparison is effected in two frequency bands defined by the filters 13a, 14a, and 13b, 14b and the gate inhibited, via "OR" gate 15 when the signals in either band bear that relationship. As described the incoming path EL-L signal is fed to the comparison circuits 10a, 10b, via a variable attenuator circuit 16 whose attenuation is increased, either in one step or continuously, during the time the outgoing line is blocked, in order that breaking in is effected at a lower outgoing signal level after the line has been blocked for a short time. The filters 13a and 14a can have pass bands of 300 to 2000 Hz and filters 13b, 14b 2000 to 3000 Hz. or 13a, 14a can be 300 to 3000 Hz and 13b, 14b 2000 to 3000 Hz.
Patent GB-1494335-A (GB)
Title: Automatic sewing machine
IPC: D05B35/10
Filed: 1974-11-04
Abstract: 1494335 Automatic sewing machines KAYABAKOGYO KK 4 Nov 1974 47700/74 Heading D1G In an automatic sewing machine which sews together two superposed pieces of material the edge of each piece is detected and, if necessary, the pieces are adjusted to maintain the edges in alignment. A sensing unit 63 (Fig. 6) situated just before the needle comprises a reflecting plate 77 between two arms 66, 69 each arm having several light sources 81 and photo cells 82 to detect light reflected from the plate. Material passing between the arms and the plate interrupts the beams. If the top and bottom photo cells indicate that the edges of the layers are not aligned as they pass through the sensor an aligning device shifts the layers transversely.  The aligning device. (Fig. 5) comprises a plate 113 placed between the layers, and two pinions 97. 135 at the ends of two arms 92, 130. The pinions engage the respective top and bottom surfaces of the layers and move them transversely when required. The pinions are rotated by electric motors 104. 137 through shafts extending through the arms 92, 130. In operation the sewing starts in the reverse direction at a slow speed driven by an auxiliary electric motor 30. After sewing a predetermined number of stitches the control unit 13 reverses the feed and causes an air cylinder 47 to clutch the drive to the fast electric motor 29. As the end of the workpiece passes the sensing unit 63 one photocell indicates the absence of the workpiece and the control unit changes the drive to the slow auxiliary motor 30. After a predetermined number of stitches it reverses the feed for a predetermined number of stitches, then stops the machine and cuts the thread. The air cylinder 47 operating the clutch can be overridden by a foot treadle 35, and the air cylinder 46 raising and lowering the presser foot can be overridden by a knee operated lever 27 so that the machine can be operator controlled.
Patent GB-1079768-A (GB)
Title: Electric device for repetitive stimulation of body tissues
Inventor: JR JOHN WALTER KELLER
IPC: A61N1/375
Filed: 1964-11-24
Abstract: 1,079,768. Electromedical apparatus. CORDIS CORPORATION. Nov. 24, 1964, No. 47725/64. Heading A5R. An electrical cardiac pacer for implanting in the body comprises a stimulation circuit within a casing 10 and responsive to pulses received from the heart by a sensing electrode 37, a stimulating electrode 35 or 36, and a return electrode 12 which has a larger surface area than the other electrodes, the connections between the circuit and the electrodes being of such extent that the return electrode may be located remote from the other two electrodes. The stimulating electrodes and the sensing electrodes are sutured to the heart and the return electrode 12 forms a cover for the plastic casing of the circuit which is placed in the abdomen. One of a pair of stimulating electrodes and the sensing electrode are connected to the circuit by a reversible plug and socket connection in one position, the other stimulating electrode and the sensing electrode being connected to the circuit when the plug and socket connection is in its other position. The stimulating and sensing electrodes comprise silicone rubber tabs having apertures for suturing to the heart and contact members formed by platimum wire coils or loops. The device may be used for repetitive stimulation of body tissue other than cardiac tissue.
Patent GB-1373131-A (GB)
Title: Photographic silver halide products and diffusion transfer processes
IPC: G03C8/48
Filed: 1971-10-18
Abstract: 1373131 Photographic diffusion transfer film unit containing optical filter agent POLAROID CORP 18 Oct 1971 [23 Oct 1970(2)] 48274/71 Heading G2C A photographic film unit comprises a photosensitive silver halide layer having associated therewith dye image-forming material which is processing composition diffusible as a function of exposure, an image-receiving layer capable of receiving dye image-forming material diffusing to it, a layer between the silver halide and imagereceiving layers comprising an inorganic reflecting pigment e.g. titanium dioxide and at least one optical filter agent at a concentration effective to provide a complete barrier to incident actinic radiation when the filter agent is above its pKa, or means for forming such a layer, and means for reducing the pH from a first pH, which is above the pKa of the filter agent and at which the imageforming material is diffusible to a second pH which is below the pKa of the filter agent and at which the image-forming material is diffusible and after an interval sufficient to permit imageformation in the image-receiving layer, to a third pH at which the image-forming material is non- diffusible. The means for reducing the pH stepwise may comprise a neutralizing layer in the unit capable of reducing the pH from the first pH to the third pH and a buffering agent effective to hold the pH temporarily at the second pH. The buffering agent may be present in a layer adjacent in the image-receiving or photo-sensitive layers or in the processing composition. The buffering agent may be sodium orthosilicate, sodium metasilicate, fumed silica, a salt of salicylic acid or a salt of ethylenediamine tetraacetic acid. Alternatively, the means for reducing the pH stepwise may comprise an acidic additive in the film unit capable of reducing the pH from the first pH to the second pH and a neutralizing layer in the unit capable of reducing the pH from the second pH to the third pH. The acidic additive may be present in the photo-sensitive or image-receiving layers or a layer adjacent thereto and may be benzoic acid, salicylic acid, methyl sulphonamide or an acid salt of anti-foggant e.g. benzotriazole. The neutralizing layer may be a polymeric layer carrying acidic groups. The dye image-forming material may be a dye-developer
Patent GB-1473927-A (GB)
Title: Device for automatically locking transverse sealing joints between movable hatch-cover sections or the like
IPC: B63B19/24
Filed: 1974-11-08
Abstract: 1473927 Hatch covers MAC GREGOR COMARAIN 8 Nov 1974 [8 Nov 1973[ 48463/74 Addition to 1181978 Heading B7S A hatch cover with abutting sections 5, 6 has a rotary torsion bar 13b mounted on section 6 parallel to the abutting edges of the sections and provided with a first abutment element 15b projecting towards the adjacent section 5 and co-operating with abutment element 16a on section 5. A second abutment element 15c co-operates with an abutment element 16b on section 6. The torsion bar is rotated into the locking position by the engagement of radially extending arm 17<SP>1</SP> with movable actuating rod 36 mounted on the side of section 5, which rod engages covering 3 upon the lowering of the hatch sections. The hatch cover described with respect to Fig. 1 (not shown) has two coaxially aligned torsion bars 13b mounted symmetrically with respect to the longitudinal vertical centre plane of the cover.
Patent GB-1166513-A (GB)
Title: Butt-Welding Apparatus
IPC: B23K11/00
Filed: 1967-10-26
Abstract: 1,166,513. Flash-butt welding. H. A. SCHLATTER A.G. 26 Oct., 1967 [28 Oct., 1966], No. 48754/67. Heading B3R. Apparatus for successively welding pieces of preheated material e.g. billets, to form a continuous length or lengths comprises at least one flash-butt welding machine 5 and guide rails along which the machine is movable by means of a drive, at least one rail 13 being disposed above and at least one rail 7 being disposed below the machine and at least one of which rails supports the machine, the machine having two parts 17, 18 connected together by a pivot 19 whose axis is perpendicular to the line of movement of the workpieces, one part 17 carrying a device 20, 21 for clamping a length of material and the other part 18 carrying a device 25, 26 for clamping a succeeding piece of material to be welded. The upper conductive jaws 20, 25 are fixed respectively to parts 17, 18 and connected to the respective ends of secondary windings of two transformers 32, 33, the other ends of the secondaries being joined to connect the windings in series. The lower jaws 21, 26 are fixed to the cylinders of hydraulic rams whose pistons are secured to the parts 17, 18 respectively. A further hydraulic ram located at the bottom of the machine has its cylinder 35 fixed to part 17 and its piston 36 fixed by a flexible leaf-spring 37 to part 18. The upper jaws may be provided with removable inserts (29) (Figs. 3, 4, not shown), which, when in place, project from the clamped surface of the jaws. The machine moves in a tank of water such that with the lower jaws retracted they are at least partly submerged. The upper part of the machine may oe guided by two rails (12, 13) (Fig. 2, not shown) on which rollers fixed to the machine run. Four such machines may be mounted side by side.
Patent GB-1493123-A (GB)
Title: Display device
IPC: B62B3/14
Filed: 1974-11-12
Abstract: 1493123 Display devices VISUAL MOTIVATION Ltd 12 Nov 1974 48820/74 Heading G5C A display device for releasable attachment to a shopping trolley consists of a frame 24 of angle bars with clips 26, 28 for engaging the walls of the trolley, a display card 32 being sandwiched between a transparent front sheet 30 and a backing sheet 34 and received in the frame. The display matter is easily removed and changed.
Patent GB-967130-A (GB)
Title: Preparation of shaped bodies
IPC: C08K5/14
Filed: 1962-12-28
Abstract: Shaped bodies are prepared from cross-linked homo- or copolymers of ethylene by mixing the non-crosslinked polymer, at temperatures above its softening temperature, with at least one accelerator which is an organic compound containing at least one enolisable carbonyl group and at least one aromatic radical on the carbon or nitrogen atom adjacent to the carbonyl group and/or such a compound capable of forming an enolisable carbonyl group, and at least one organic peroxide, then cross-linking the mixture by increasing the temperature to at least the decomposition temperature of the peroxide or peroxide mixture, the shaping of the bodies being effected before or during the cross-linking. Accelerators mentioned have the formula (a): <FORM:0967130/C3/1> where R1 represents an aromatic radical, either unsubstituted or substituted by alkyl, hydroxyl, hydroxyalkyl, amino or halogen groups; R11 represents hydrogen, hydroxyl, formyl, hydroxyalkyl, cyano, alkyl, benzyl, benzoyl, benzyloxy, amino, anilido or halogen groups, or an aromatic radical either unsubstituted or substituted by alkyl, hydroxyl, hydroxyalkyl, amino or halogen groups; and R represents hydrogen, benzyl, alkyl or an aromatic radical either unsubstituted or substituted by alkyl, hydroxyl, hydroxyalkyl, amino or halogen groups: or (b): <FORM:0967130/C3/2> where R1 is as above, but it may also be benzoylamino and R is an alkyl, benzyl or anilido group, or an aromatic group either unsubstituted or substituted by alkyl, hydroxyl, hydroxyalkyl, amino or halogen groups.  Long lists of accelerators are given including phenyl acetaldehyde and substituted phenyl acetaldehydes, desoxybenzoins, various anilides and other amides. Alternatively desoxybenzoin diethyl acetal may be used. Preferably the accelerator is added first to the polymer and then the peroxide. Fillers to improve light-fastness may be added e.g. carbon blacks, oxides of metals or metalloids e.g. oxides of aluminium, silicon, iron and zirconium.  Lists of suitable peroxides are given. In the examples:-(A) a sheet of high pressure polyethylene was mixed with dibenzyl ketone, a -phenyl-propionaldehyde, phenyl acetaldehyde, benzylmethylketone, acetanilide or bis-benzoyl-p-phenylene diamine and dicumyl peroxide, (B) a sheet of low pressure polyethylene was mixed with desoxybenzoin or phenylacetaldehyde and dicumyl peroxide.
Patent GB-1166065-A (GB)
Title: Photosensitive Materials for use in the Preparation of an Offset Printing Plate
Inventor: FRANCO SIMONE
IPC: G03F7/023
Filed: 1966-11-01
Abstract: 1,166,065. Cross-linked polymers. FERRANIA S.p.A. 1 Nov., 1966 [2 Nov., 1965; 18 Oct., 1966], No. 49005/66. Heading C3P. [Also in Division G2] Alkali-insoluble but alkali-permeable polymers are produced by copolymerizing vinyl acetate with vinyl monophthalate, acrylic acid, methacrylic acid or crotonic acid or copolymerizing ethyl acrylate with acrylic acid or acrylonitrile with methacrylic acid so that there are up to 10% of carboxylic acid groups and then cross-linking with polyglycidyl methacrylate or copolymers thereof, 2,4 or 2,6 tolyenedi - isocyanate, hexamethylene di - isocyanate, diphenyl - or diphenylmethane - 4,41 - diisocyanate, the condensate of 1,1,1-trimethylolpropane with 2,4 tolyldiisocyanate, p,p<SP>1</SP>p<SP>11</SP>-triphenyl methane triisocyanate, polyvinyl isocyanate, tris - (1 - aziridinyl) - phosphine oxide, tris - (1 - (2 - methyl) - aziridinyl)- phosphine oxide, s-triethylene imino triazine and acryloyl ethylene-imine.
Patent GB-1300921-A (GB)
Title: Improvements in hydraulic braking systems for vehicles
Inventor: WILSON ALEXANDER JOHN
IPC: B60T8/36
Filed: 1968-10-17
Abstract: 1300921 Antiskid braking systems GIRLING Ltd 15 Jan 1970 [17 Oct 1968] 49302/68 Heading F2F In a vehicle braking antiskid system hydraulic fluid is passed from a pedal-operated valve 11 (or master cylinder) to slave cylinders by way of a solenoid valve 18 which is adapted to cut off supply of fluid to the slave cylinders and return it to a reservoir supplying the valve 11 when signals detected by sensors 20 are passed via an amplifier 21 to the valve 18 when the deceleration of the braked wheels exceeds a predetermined value. In the embodiment shown fluid passes straight to the front wheels by way of conduit 15 and to the rear wheels by way of the valve 18. As shown in Fig. 2, a magnetic core piece 40 of solenoid valve 18 normally closes, at 44, 30, a first outlet 29 leading (at 19, Fig. 1) to the reservoir, while inlet 32 from valve 11 is permitted to communicate via bores 33, 34 and passage 35 with a second outlet 36 leading to the slave cylinders. On energization of solenoid windings 39, the magnetic core piece first opens communication between the second outlet 36 and first outlet 29 via a through bore 41 in the core piece, and then, by stem 42 extending from the core piece, closes inlet 32, spring 43 being thereby compressed.
Patent GB-1120363-A (GB)
Title: Improvements relating to peak analysis systems
Inventor: DRURY GEOFFREY STUART
IPC: G06F17/00
Filed: 1965-11-23
Abstract: 1,120,363. Peak analysis. BRITISH RAILWAYS BOARD, and G. S. DRURY. 25 May, 1966 [23 Nov., 1965], No. 49674/65. Heading G4H. In a peak analysis system, the effects of spurious peaks and troughs are eliminated. ADC produces 90 degrees phase-displaced pulse trains representing increments of the input variable. DLC is phase-sensitive and provides a train of pulses on lead F or R, and MCIG produces a pulse each time the trend of the variable reverses, i.e. at each peak and trough, to reset divide-by-ten counter CTR10. If counter CTR10 subsequently receives seven pulses from ADC before the next pulse from MCIG, a pulse R/O is produced to read out counter CTR6 which is cascaded to CTR10 via CTR2. The excursion of the variable between successive peaks and troughs is assigned different statistical weights according to the magnitude of the excursion. The output of decoder DCR6 indicates which statistical band the detected peak lies in, each band being 20 increments wide. An output 1-5 from DCR6 opens gate TG2 to feed clock pulses to counters CTR s  and CTR x  until a number corresponding to the statistical weighting of the band is registered in CTR s . Counters CTR2, CTR6 and CTR s  are then reset. If counter CTR10 does not receive seven pulses before being reset by the next pulse from MCIG, no pulses are supplied to CTR s  and CTR x . CTR x  controls neon lamps and a printer for read-out.
Patent GB-1241840-A (GB)
Title: Automatic firearms
IPC: F41A3/76
Filed: 1968-10-22
Abstract: 1,241,840. Automatic firearms; cartridges. ALLIED RESEARCH ASSOCIATES Inc. 22 Oct., 1968 [6 Nov., 1967], No. 49975/68. Headings F3A and F3C. An automatic firearm comprises a frame 1, a cylinder 8 rotatable in the frame 1 and provided with a plurality of blind cartridge receiving chambers 9, a barrel 5 and recoil operated mechanisms for rotating the cylinder to. place a loaded chamber in registry with the barrel and loading a cartridge 16 into another of the chambers each time a cartridge is fired. The firing mechanism comprises an electrical circuit which is adapted to be completed through an electrical primer 30 in a cartridge in one of the chambers when the chamber is in registry with the barrel. In the construction shown the firing mechanism comprises a contact 33 within each chamber, each contact 33 being connected to a contact 35 on the outer wall of the cylinder, the contacts and connections therefor being insulated from the cylinder. A contact 36 mounted on and insulated from the frame engages the contact 35 of the chamber in the firing position. The firing mechanism further comprises a trigger 4 which when squeezed urges two contacts 43, 44 into engagement. A switch 41 is provided for permanently opening the firing circuit (as shown) or closing the circuit through a " direct " terminal 40 to provide automatic firing or through a resistor-capacitor circuit to give single shot firing. The cylinder 8, in firing the firearm, is urged rearwardly against a spring 11, a cam follower. 14 connected to the frame working in a cam groove 13 in the cylinder 8, to rotate the cylinder through 90 degrees. During the reciprocation of the cylinder 8 the loading mechanism which comprises a rack and pinion arrangement 22, 23, 24 in working engagement with the cylinder 8, is also actuated so that a plunger 18 thereof allows a cartridge 16 to emerge from the mouth of a magazine 15 and then urges the cartridge into an aligned chamber 9. A gas seal is provided between the cylinder and the barrel by tapering portions 12 on the cylinder. In a modification (Fig. 6, not shown) on firing a cartridge, a sleeve housed in the " fired " chamber is urged outwardly therefrom to bridge the gap between the cylinder and the barrel to form a gas seal. A spring- loaded mechanism is provided in the barrel for urging the sleeve back into its associated chamber. The firearm may be actuated other than by direct blowback. A cartridge 16 comprises a projectile 25 of lead, lead alloy or the like, an outer jacket 28 of explosive, electrically insulating material e.g. plastic explosive material, a charge e.g. of lead styphnate, and the primer 30 which may be platinum-iridium bridge wire.