baber/WOPTO huggingface dataset:
Patent GB-925249-A (GB)
Title: Improvements in or relating to the manufacture of cellular materials
Inventor: BUIST JACK MITCHELL
IPC: C08J9/36
Filed: 1960-10-12
Abstract: A process for improving the physical properties of flexible polyurethane foam comprises compression of the foam to less than half its original volume followed by removal of the forces causing compression and expansion of the compressed foam to approximately its original dimensions, characterized in that the expansion takes place in an atmosphere of a gas to which the foam is chemically inert, the gas being maintained at a temperature of from 80 DEG F to 300 DEG F. Suitable gas is carbon dioxide, nitrogen, oxygen and hydrogen.  In examples the process is effected by passing foam, soon after its preparation, through rollers and allowing it to expand in air at 100 DEG  to 105 DEG F. and at 110 DEG F. respectively.ALSO:A process for improving the physical properties of flexible polyurethane foam comprises compression of the foam to less than half its original volume followed by removal of the forces causing compression and expansion of the compressed foam to approximately its original dimensions, characterised in that the expansion takes place in an atmosphere of a gas to which the foam is chemically inert, the gas being maintained at a temperature of from 80 DEG F. to 300 DEG F. Suitable gas is carbon dioxide, nitrogen, oxygen and hydrogen.  In examples the process is effected by passing foam, soon after its preparation, through rollers and allowing it to expand in air at 100 DEG  to 105 DEG F. and at 110 DEG F. respectively.
Patent GB-392641-A (GB)
Title: Improvements in and connected with sound reproducing apparatus
IPC: G11B15/22
Filed: 1931-12-17
Abstract: 392,641. Optical soundreproducing apparatus. HENDERSON, W. A., 125, Burbage Road, Dulwich Village, London, and ARNOLD, H. C., 5, Parkfield Road, Waterloo, near Liverpool. Dec. 17, 1931, No. 34980. [Class 40 (ii).] Comprises apparatus for reproducing sound from a non-endless optical soundrecord film bearing a plurality of sound-record tracks, means actuated by contacts near the ends of the film being provided to close the circuits ot devices for reversing automatically the direction of motion of the film and for changing the sound-record track exposed to the reproducing light'beam. The apparatus, housed in a casing 1, Fig. 1, comprises a sound gate 6, a photoelectric cell 2, a light source 3, and pulleys 8, 9 which guide the sound film 10 through the gate 6 from a spool 11 to a spool 12. Pulleys 15, mounted on the spindles of the spools 11, 12 are driven from an electric motor 16 by belts 17, 18 and are provided with free-wheel devices, so that when one pulley 15 is driven in one direction it is coupled positively to its spindle while the other pulley rotates idly, and vice versa. In this way, the direction of motion of the film 10 can be changed by reversing the direction of rotaton of the motor 16 This reversal is effected by the closing of a circuit by a copper strip 17, Fig. 3, one such strip being carried at each end of the film 10. Each strip 17 is adapted to bridge copper flanges 8a, 9a on the pulleys 8, 9, respectively, and so produce energization of an electromagnet 21 whose armature 22 is moved axially against the influence of a spring 22a. This causes movement of a conductor strip 30 away from a pair of contacts 31, 32, to break the circuit of the motor 16, and the simultaneous rotation of a switch member 33 through the action of a pawl 34 and ratchet 35. Rotation of the switch member 33 reverses contacts in the switch so that, on the release of the armature 22 the direction of current flow to the motor 16 is reversed and the film 10 is driven in the reverse direction. Energization of the electromagnet 21 causes also a pawl 23 on one end of the armature 22 to engage operatively with one of a series of ratchet teeth 24 on a plate 25 to slide the plate 25 along guides 26 so that a light aperture 27 is brought into line with the next longitudinal sound-record track on the film 10. This sequence of operations is repeated when the contact strip 17 on the other end of the film bridges the flanges of the other guide pulley, and so on, until the whole of the record has been reproduced, whereupon the machine is stopped by the automatic operation of a main switch 48, Fig. 1. A reserve supply of films 45 and a reserve battery 49 may be stored in a compartment 46, and the thermionic circuit may be connected at will to a wireless aerial, the motor 16 being then cut out.
Patent GB-1168284-A (GB)
Title: Photosensitive Device
Inventor: BINKS ALBERT EDWARD
IPC: H01L31/00
Filed: 1967-06-21
Abstract: 1,168,284. Utilizing radiation detectors. ILFORD Ltd. June 12, 1968 [June 21, 1967; July 31, 1967], Nos. 28727/67 and 35029/67. Heading G1A. [Also in Division H1] Connection is made to a photo-sensitive material or to a photo-sensitive junction by a layer of polyalkylene oxide, such as a polyolefin oxide composed of units of the general formula [(CH 2 )n<SP>-</SP> 0] where n is 2, 3, or 4, such layers being themselves not responsive to light. Connection to the layer may be made through a silver or aluminium coating which should be shielded from photon radiation. In one example the photo-conductivity of poly-N-vinyl-carbazole is measured by sandwiching a slice of the material between two polyethylene oxide slices, the slices being held together by a spring. The photo-cell so formed is illuminated by monochromatic beams from a mercury vapour lamp and the current measured when a 120V supply is connected across the cell with its negative terminal connected to the exposed side.
Patent GB-303150-A (GB)
Title: Improvements in or relating to high frequency circuit arrangements, thermionic valvetransmitters and the like
IPC: H03B5/10
Filed: 1928-11-28
Abstract: 303,150. Telefunken Ges. f³r Drahtlose Telegraphie. Dec. 29, 1927, [Convention date]. Thermionic generators. -In a thermionic-valve transmitter or similar highfrequency arrangement an even plurality of oscillatory circuits II, III is interposed in series between a generating circuit I and a loading circuit, for example an aerial IV, to avoid increasing the load on the generator if the aerial breaks or is otherwise accidentally detuned. All the circuits are tuned to the same frequency and the circuit II is coupled inductively to the generating circuit and capacitatively to the remaining circuits.
Patent GB-892111-A (GB)
Title: Improvements in or relating to carding machines for jute, jute substitute fibres, hemp and flax
IPC: D01G15/98
Filed: 1959-10-16
Abstract: 892,111. Carding machines. SCHNEIDER, W. H. Oct. 16, 1959 [Oct. 23, 1958], No. 35106/59. Class 120(1) In a worker and stripper carding machine for jute, jute substitute fibres, hemp or flax, the stripper 3 is provided with Morel clothing in association with which operate a brush 4 and knife roller 5 that removes woody particles and seeds from the stripper surface and directs them into a collector 6 which may be emptied mechanically, pneumatically or manually.
Patent GB-1529900-A (GB)
Title: Dual frequency microstrip antenna structure
IPC: H01Q5/00
Filed: 1976-08-24
Abstract: 1529900 Microstrip antenna BALL BROS RESEARCH CORP 24 Aug 1976 [25 Aug 1975] 35116/76 Heading H4A A dual-frequency microstrip antenna comprises a ground plane 14, a dielectric layer 12, and conducting areas 16, 18, 20, 22 mutually spaced to define a first pair of cavity-backed intersecting slots for transmitting or receiving at a first frequency and a second pair of cavity-backed intersecting slots for transmitting or receiving at the second frequency. Microstrip conductors 24-38 connect the areas to a common terminal 40. The outer edges of the areas 16-22 are connected to ground plane 14 to form the cavities, which are loaded by the dielectric 12. Inner edges 42, 48 bound a slot backed by a cavity of depth l 1 ; likewise, edges 44, 56 are associated with a cavity of depth l 1 <SP>1</SP>. These two cavities are approximately resonant at the first frequency, the difference between l 1  and l 1 <SP>1</SP> determining the relative phase of currents at the slots associated with them and hence the ellipticity of polarization of waves at the first frequency. Similarly cavities of depth l 2  and 12' (defined by edges 50, 54 and 46, 52) are approximately resonant at the second frequency. The antenna is useful on an aircraft or satellite. Its directivity pattern is stated to be nearly omnidirectional in the upper hemisphere.
Patent GB-470752-A (GB)
Title: Improvements in or relating to electrical oscillation generators
IPC: H03K4/28
Filed: 1935-12-20
Abstract: 470,752. Valve generating circuits. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. Dec. 20, 1935, No. 35394. Convention date, Dec. 20, 1934. [Class 40 (v)] A saw - tooth current wave, suitable for the magnetic deflection of the beam, in a cathode-ray tube, is generated by a back - coupled screen - grid or pentode valve V having an inductance coil AL in its anode circuit, coupled to a grid coil GL. The latter may be tuned by a condenser GC to a frequency equal to or greater than that of the anode coil with its small selfcapacity SC. Resistance is shunted across one or both coils, but the damping is not sufficient to render the circuit aperiodic. The mean screen-grid current is at least equal to the mean anode current. The frequency of' the saw-tooth oscillation may be varied by regulating the anode voltage, and synchronizing- pulses may be applied to the control grid. The coil AL may be the deflecting-coil of the cathode-ray tube. The Specification includes an explanatory diagram showing the anodevoltage anode-current characteristic of the valve, Fig. 1 (not shown), and dimensions of the circuit elements are given.
Patent GB-198625-A (GB)
Title: Improvements in apparatus for heat-treatment by means of a bath of molten metal
IPC: C21D1/48
Filed: 1922-12-30
Abstract: 198,625. Thermal Industrial & Chemical (T.I.C.) Research Co., Ltd., and Duckham, Sir A. M. Dec. 30, 1922. Heating-apparatus.-In apparatus for heating materials in a bath of molten metal, a conveyer chain f with retaining plates g is so mounted on sprockets e that the lower run of the chain is just above the surface of the molten metal in the bath a. Side ledges take the weight of the upper run of the chain and the upward thrust of the lowerrun.
Patent GB-966034-A (GB)
Title: Advanceable roof support suitable for use in mines
Inventor: MILLS JOSEPH ALEXANDER WALL AC
IPC: E21D23/00
Filed: 1961-10-02
Abstract: 966,034. Advancing mine roof supports. DOWTY MINING EQUIPMENT Ltd. Sept. 24, 1962 [Oct. 2, 1961; Oct. 19, 1961; Dec. 27, 1961], Nos. 35517/61, 37564/61 and 46296/61. Heading EIE. An advancing mine roof support comprises a roof engaging member 5 having two pairs of props 6, 7 which are pivoted thereto and interconnected by links 23 whereby the member 5 may be slidably advanced together with one pair of props whilst the other extended pair of props rock about their bases, see Figs. 2 and 11, (not shown). The member 5 is provided with opposed lugs connected by advancing jacks to the frames arranged on either side thereof, see Fig. 1 (not shown). Pivotal movement of the props is limited or restricted by adjustable spring-loaded plungers 22, see also Fig. 10 (not shown) or springs surrounding the stub shafts 16 of the props. Each prop is provided with a combined relief and release valve and the props and advancing jacks of a frame are jointly controlled by two control valve units mounted in a common housing for full details of which Figs. 5 - - 9, (not shown), should be referred to. The member 5 may be combined with a friction-reducing agent such as molybdenum disulphide or lubricated by water or the hydraulic fluid used in the props. The member 5 may also have a claw or ratchet mechanism to prevent it from moving backwards.
Patent GB-878431-A (GB)
Title: Improvements in or relating to window arrangements, particularly for engine driven vehicles
IPC: B60J1/02
Filed: 1959-10-20
Abstract: 878,431. Windscreens. HEIMER, A. F. Oct. 20, 1959 [Oct. 27, 1958; Dec. 19, 1958], No. 35531/59. Class 20(3) In order to create an optically dead space at the junction of two angularly related windows, such as the side window 2 and windscreen 3 of a motor car, to e.g. a driver's place 5 between the windows and closer to the side window 2, than the other window 3 the window edges or supports 13 at the junction falling within said dead space, the junction end 6 of the pane 2 is cut obliquely to the driver's place and forms one boundary of the dead space while the other boundary is formed by the unbroken path of a ray of light tangential to the junction edge of the closer window and extending to the driver's place 5. Preferably the pane 2 has several times the thickness of the pane 3 and may have parallel sides or decrease in thickness towards the junction at a rate of a fraction of one degree.
Patent GB-1282895-A (GB)
Title: Process and apparatus for the continuous manufacture of covers
IPC: B31D1/00
Filed: 1969-07-15
Abstract: 1282895 Laminated insulating covers; seaming edges FELDMUHLE ANLAGEN-UND PRODUKTIONS-GmbH 15 July 1969 [15 July 1968] 35571/69 Headings B5K and B5N [Also in Division A5] A cover comprising an envelope of non- woven fabric enclosing a soft fibrous filling, e.g. cotton, having thermally insulating properties is produced by continuously withdrawing from each of two rolls of non-woven fabric an upper web and a lower web, bringing the webs together in superposition with a space between them, introducing the filling into the space, connecting together the side edges of the filled webs in a first seaming station and optionally also quitting the filled webs in the station, intermittently cutting the travelling filled webs into lengths by knife means, e.g. a rotary multi-edged knife, traversing the webs at an angle such as to form a cut perpendicular to the direction of travel of the webs, conveying each of the resulting partly formed covers in the same direction as the webs at a higher speed on a first conveying section, receiving and arresting each cover on a second conveying section extending perpendicularly to the first conveying section, conveying each partly formed cover on the second conveying section to a second seaming section, connecting together the cut edges of the partly formed cover in the second station and optionally quitting the cover therein. The edges may be connected adhesively by means of a heat sealable band. The seaming and quitting stations may comprise a device in which the needle heads and edge connecting devices are adjustable relatively to one another and are operated on the same shaft. Quitting may be effected by point connection of the layers of the envelope along the quitting seams by point stitching or point adhesion. The edges may be trimmed prior to connecting them. The finished cover may be passed to a packing track extending in a direction perpendicular to that of the second conveying and seaming stations where it is folded longitudinally and transversely, wrapped and seated in foil. The cover may be used as an insulating mat for building purposes, mattress protector, anti-incontinence under-layer or diaper.
Patent GB-1336538-A (GB)
Title: Device for opening or closing a sliding door displaceable along a wall
IPC: E05F15/56
Filed: 1972-08-01
Abstract: 1336538 Operating sliding doors J J G MARKUS 1 Aug 1972 [11 Aug 1971] 35812/ 72 Heading E2M An operating mechanism for a sliding door 1 comprises a piston, 5a, and cylinder 5, mechanism having a stroke which is less than the path to be travelled by the door and in which a pin 7 on the piston engages projections 11, 12, 13 on the door; the projections 11 and 13 being engaged to begin the opening and closing movements respectively with the piston returning to engage projection 12 on a second power stroke to complete the movement in each case. The pin 7 is urged upwardly by a spring (not shown) and a profiled guide 8 controls its engagement with the projections. Contact elements 15, 16 and 18, 19 on the door engage wall mounted switches 14 and 17 to control the movement of the piston. When the door is to be opened the piston moves to the right from the position shown in Fig. 1 and pin 7 engages projection 11; at the fully extended position of the piston, Fig. 3, contact element 15 operates switch 14 to retract the piston while the door continues to move under the momentum acquired on the first power stroke and contact element 16 operates switch 14 to begin a second power stroke when projection 12 is in a position to be engaged by the pin (Fig. 4). The piston remains extended once the door is fully open, moving to the left to engage projection 13 when the door is to be closed. On the completion of the first closing power stroke element 19 operates switch 17 to return the piston to the right with the element 18 operating switch 17 to begin the second power stroke when projection 12 is in a position to be re-engaged. One intermediate projection 12 is shown however more than one may be used in conjunction with the appropriate switches to cause the piston to execute the necessary no. of power strokes.
Patent GB-960469-A (GB)
Title: Improvements in or relating to sampling circuits for transducers
IPC: H03K17/60
Filed: 1961-10-05
Abstract: 960,469. Transistor gating circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. Oct. 5, 1961 [Oct. 8, 1960], No. 35899/61. Heading H3T. In a circuit arrangement for periodically sampling and amplifying the measuring voltage supplied by a measuring transducer, an amplifier is connected to a source of sampling pulses having a duration at least two orders of magnitude shorter than the interval between two successive pulses and to the transducer in such a manner that the transducer is shunted by a capacitor which is charged to the measuring voltage delivered by the transducer during the interval between two successive sampling pulses and acts as an input voltage source of comparatively low internal impedance for the amplifier during each sampling pulse. As shown, a transducer 4 which may be a strain gauge bridge is connected between the bases of two transistors 1, 2 connected in push-pull and having a symmetrical output circuit comprising two resistors 8, 9 connected between the respective collectors and earth terminal 7. Positive sampling pulses are applied to the emitters via terminal 6, common resistor 3 and potentiometer 5. In order to reduce the internal resistance of the transducer with respect to the base input resistance of the transistors the transducer 4 is shunted by a capacitor 10 such that the voltage drop produced by an asymmetry of the base current with respect to the transducer becomes negligible in relation to the voltage delivered by the transducer. During a sampling pulse the capacitor 10 discharges to a very slight degree through the input resistance of the push-pull stage because the time constant is very large compared with the duration of the pulse. During an interval between pulses, the duration of which is two orders of magnitude greater than that of a pulse, the capacitor is charged to a voltage which is substantially equal to the voltage delivered by the transducer 4 under no-load conditions. Specification 899,407 is referred to.
Patent GB-390468-A (GB)
Title: Improvements in or relating to pipe clamps
IPC: F16L1/10
Filed: 1932-12-19
Abstract: 390,468. Uniting by fusion. NATIONAL TRANSIT PUMP & MACHINE CO., Oil City, Pennsylvania, U.S.A.- (Assignees of Pearson, C. A. ; 311, West 5th Street, Oil City, Pennsylvania, U.S.A.) Dec. 19, 1932, No. 35940. Convention date, Sept. 14. [Class 83 (iv).] A pipe clamp comprises long jaws 5, 6, 7 which by operation of a hand-lever 8 and toggles 11 grip and force the abutting ends of two pipes 13 into alignment for tack &c. welding. The toggles act to lock the jaws on the pipe until released.
Patent GB-1503451-A (GB)
Title: Inspection apparatus
IPC: G01N21/90
Filed: 1976-09-01
Abstract: 1503451 Detecting flaws in glass containers OWENS-ILLINOIS Inc 1 Sept 1976 [2 Sept 1975] 36102/76 Heading G1A Stress flaws in glass containers are detected by illuminating the containers with linearly polarized infrared radiation of wavelength greater than 7000A, viewing the container with a TV camera via a polarizing filter set at 90 degrees to the polarization of the illumination and a filter passing wavelengths of less than 9500Š and determining flaws from the camera output.  The illumination sources 18, 19 are flash tubes with high infrared output, fitted with polarizers 21, 22. They are preferably arranged to operate when a container 10 is between sensor 42 and its minor reflector 44. The TV cameras 14, 15 are fitted with polarizing and <9500Š filters 24, 25, 27, 28 and are operated in synchronism. Their output drives a reject device 40.
Patent GB-1031811-A (GB)
Title: Improvements in or relating to low frequency waveform generators
Inventor: BECK HAROLD VINCENT
IPC: H03B5/24
Filed: 1961-10-09
Abstract: 1,031,811. Transistor circuits. MARCONI INSTRUMENTS Ltd. Sept. 26, 1962 [Oct. 9, 1961], No. 36137/61. Heading H3T. In a low-frequency waveform generator of the type in which a relatively high-frequency wave is sampled at different points in successive cycles, the sampling pulses are derived by combining the low-frequency output with the relatively high-frequency input. As shown in Fig. 1, sinusoidal or other waveforms at T1 are sampled by a gate 1 at slightly earlier or later times in each cycle (or every nth cycle) the samples being stored and integrated at 2 and 3 so as to provide a relatively smoothly varying, lower frequency waveform at T2. Pulses are produced by a fiduciary instant generator 6 (monostable multivibrator) which are delayed by variable amounts at 7 under control of a lower frequency sawtooth generator 8 synchronized with a pulse derived at 9 from the output waveform. Generating pulses with adjustable delay.-Fig. 2 shows a circuit for use in block 7 of Fig. 1. Transistor T3 is initially bottomed whilst T4 is non-conductive. Each positive-going pulse at 10 (from generator 6, Fig. 1) causes T3 to cease bottoming and to discharge capacitor C1 with constant current until T4 becomes conductive when a positive-going step is generated at the collector of T4, which is differentiated and shaped by T5, T6 to form a positive-going short-duration pulse at 12. The onset of this pulse is delayed from the onset of the pulse at 10 by a time dependent on the base voltage of T4 which in turn is controlled by a lower-frequency sawtooth wave at 11.
Patent GB-506934-A (GB)
Title: A process for preparing superficially coloured road-covering or other materials
IPC: E01C7/18
Filed: 1937-12-30
Abstract: 506,934. Colouring . stone ; coating surfaces. COLAS PRODUCTS, Ltd. Dec. 30, 1937, Nos. 36143 and 36144. Convention dates, July 14, 1937 and Oct. 16, 1937. [Class 22] [Also in Group III] Mineral materials, such as stone chippings or large stones, are coated with a thin layer of pigment, if desired with the aid of a liquid such as water or oil, which is fixed on the material by an aqueous dispersion of a bituminous substance such as bitumen or tar, which gels or dries to an insoluble film. The coloured material may be used for covering roads, floors, roofs and the like, for roof and wall coverings, for covering roof paper, and as an aggregate for coloured concrete.